US20010040877A1 - Method of dynamic transmit scheduling using channel quality feedback - Google Patents
Method of dynamic transmit scheduling using channel quality feedback Download PDFInfo
- Publication number
- US20010040877A1 US20010040877A1 US09/840,538 US84053801A US2001040877A1 US 20010040877 A1 US20010040877 A1 US 20010040877A1 US 84053801 A US84053801 A US 84053801A US 2001040877 A1 US2001040877 A1 US 2001040877A1
- Authority
- US
- United States
- Prior art keywords
- mobile units
- scheduling
- channel
- mobile
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
- H04W52/221—TPC being performed according to specific parameters taking into account previous information or commands using past power control commands
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
Definitions
- the present invention is related in general to communication systems, and, more particularly, to an improved method and system for dynamic scheduling via channel quality feedback.
- each layer has a well-defined interface between itself and the layer immediately above and below. Consequently, the implementation of a particular protocol layer is independent of all other layers.
- the function of each layer is specified formally as a protocol that defines the set of rules and conventions used by the layer to communicate with a similar peer layer in another (remote) system.
- Each layer provides a defined set of services to the layer immediately above. It also uses the services provided by the layer immediately below it to transport the message units associated with the protocol to the remote peer layer.
- Communication systems such as Code Division Multiple Access (CDMA) systems, communicate messages between infrastructure equipment and subscriber or mobile units.
- a forward or downlink channel refers to data generated by cellular infrastructure equipment and transmitted for reception by a mobile communication unit
- a reverse or uplink channel refers to data generated by a mobile communication unit, such as a mobile cellular phone and transmitted for reception by the cellular infrastructure equipment, specifically a base station.
- cdma2000 provides protocols and services that correspond to the bottom two layers of the ISO/OSI Reference Model (i.e., Layer 1—the Physical Layer, and Layer 2—the Link Layer) according to the general structure specified by the ITU for IMT-2000 systems.
- Layer 1 the Physical Layer
- Layer 2 the Link Layer
- Cdma2000 also includes a Quality of Service (QOS) control mechanism to balance the varying QOS requirements of multiple concurrent services.
- QOS Quality of Service
- FIG. 1 depicts a communication system in accordance with the method and system of the present invention
- FIG. 2 illustrates a block diagram of a communication system layer structure in accordance with the method and system of the present invention
- FIG. 3 illustrates a fading profile of a typical wireless communication channel
- FIG. 4 Scheduling based on C/I measurements provided by each remote unit A and B.
- FIG. 5 Shows that the forward dedicated control channel (DCH) voltage gain levels of remote unit A and B can be used to determine scheduling priority on the common channel.
- DCH forward dedicated control channel
- FIG. 6. Shows that the accumulation of power control commands (also called the closed loop gain adjustment (CGA)) of the forward dedicated control channel (DCH) of remote unit A and B.
- CGA closed loop gain adjustment
- FIG. 7 illustrates the nature of the channel statistics and important channel metrics
- FIG. 8 illustrates an example of scheduling a plurality of users based on the channel statistics in accordance with the method and system of the present invention
- FIG. 9 illustrates a functional flow diagram depicting the process of base transceiver station transmit scheduling for a plurality of users in accordance with the method and system of the present invention
- FIG. 1 depicts a communication system 100 in accordance with the preferred embodiment of the present invention.
- System 100 includes a mobile station 102 , a first base transceiver station 104 , a second base transceiver station 103 , and a Centralized Base Station Controller (CBSC) 105 .
- CBSC 105 includes a transcoder 106 , and a selection distribution unit 111 .
- System 100 preferably includes a plurality of mobile stations and base transceiver stations, but only one mobile station and two base transceiver stations are depicted in FIG. 1 for clarity.
- system 100 is a Code Division Multiple Access (CDMA) system.
- CDMA Code Division Multiple Access
- System 100 may also be any communication system that transmits signaling messages and requires accurate delivery and receipt by mobile stations.
- CDMA Code Division Multiple Access
- First base station 104 includes a transceiver 108 that includes a transmitter and a receiver.
- Second base station 103 includes a transceiver 107 that includes a transmitter and a receiver.
- Transceivers 107 and 108 transmit, over-the-air, RF signals to be received by mobile unit 102 . The transmission is well known in the art, and will not be described further in this application. Signals transmitted from base stations 103 and 104 to mobile unit 102 are referred to herein as forward traffic frames, or as forward link messages.
- Transceivers 107 and 108 receive messages from mobile unit 102 , as is well known in the art. Such messages are referred to herein as reverse link messages.
- Mobile unit 102 is preferably a cellular telephone unit that is capable of communicating with base transceiver stations 103 and 104 .
- mobile unit 102 is a digital cellular CDMA telephone.
- Mobile unit 102 may also be a wireless data terminal or a videophone.
- Mobile unit 102 includes a transceiver 110 that includes a transmitter and a receiver, as is well known in the art.
- Mobile unit 102 communicates with base stations 103 and 104 by transmitting messages by the transceiver 110 located therein on a reverse link, and by receiving messages generated by base stations 103 and 104 at transceiver 110 located therein on the forward link.
- BTSs 103 and 104 act as the central location for managing power control in system 100 .
- CBSC 105 manages power control in system 100 .
- FIG. 2 illustrates a block diagram of a communication system layer structure 200 in accordance with the method and system of the present invention.
- FIG. 2 illustrates a block diagram of IS-95 and cdma2000 layer structure.
- IS-95 has a layered structure providing voice, packet data, simple circuit data, and simultaneous voice and packet data services.
- IS-95 includes any of the standards that are predecessors to cdma2000, i.e. IS-95-A, and TIA/EIA-95-B.
- cdma2000 provides protocols and services that correspond to the bottom two layers of the ISO/OSI Reference Model (i.e., Layer 1—the Physical Layer 202 , and Layer 2—the Link Layer 204 ) according to the general structure specified by the ITU for IMT-2000 systems.
- Layer 2 204 is further subdivided into the Link Access Control (LAC) sublayer 206 and the Medium Access Control (MAC) sublayer 208 .
- LAC Link Access Control
- MAC Medium Access Control
- QOS Quality of service
- Applications and upper layer protocols corresponding to OSI Layers 3 through 7 utilize the services provided by the cdma2000 LAC services. Examples include signaling services, voice services, packet data applications(TCP/IP), and circuit data applications.
- the design of the cdma2000 LAC and MAC sublayers 206 , 208 is motivated by many factors, among those being: the need to support a wide range of upper layer services; the requirement to provide for high efficiency and low latency for data services operating over a wide performance range; support for advanced QOS delivery of circuit and packet data services; and the demand for advanced multi-media services that support multiple concurrent voice, packet data, and circuit data services, each with varying QOS requirements.
- the cdma2000 MAC sublayer 208 provides two important functions: (1) best effort delivery—reasonably reliable transmission over the radio link with a Radio Link Protocol (RLP) 212 that provides a best effort level of reliability; and (2) multiplexing and QOS control—enforcement of negotiated QOS levels by mediating conflicting requests from competing services and by the appropriate prioritization of access requests. The resolution of these conflicting requirements is handed to a scheduler that prioritizes the prepares the users and system requirements.
- RLP Radio Link Protocol
- the Mobile Unit transmits channel quality feedback on the Reverse Link, which indicates the measured quality metrics of the forward link.
- These metrics can be explicit (actual values of channel signal to noise measurements such as C/I), implicit (power control commands) or a mixture of both.
- the channel quality metrics a fed into the scheduler which prepares the different transmission to the plurality of users and indicates the event to the MAC 208 . For these applications, portions of the MAC are moved to the Base Stations from the PDG and CBSC 105 .
- FIG. 3 The power control command behavior given rayleigh faded channel at 3 kph with 800 Hz feedback.
- FIG. 4 Scheduling based on C/I measurements provided by each remote unit A and B.
- the scheduling may be for a common channel (such as a pilot channel) shared by a plurality of mobile units.
- the remote unit reporting the strongest C/I is scheduled first, where the actual modulation (QPSK, 16QAM, 64QAM) and the encoding rate used (1 ⁇ 2 or 3 ⁇ 4) is determined by the strength of the C/I and other metrics available at the basestation indicating the available bandwidth for each remote unit. If enough bandwidth is available and the remote unit's C/I are strong enough then both can be scheduled for the same time interval using separate orthogonal codes.
- FIG. 5 Shows that the forward dedicated control channel (DCH) voltage gain levels of remote unit A and B can be used to determine scheduling priority on the common channel due to the high correlation of the gain with the reported C/I measurements (see FIG. 5). Scheduling the remote unit with the lowest DCH voltage gain is similar to scheduling based on C/I measurements passed from the remote units.
- DCH forward dedicated control channel
- FIG. 6 Shows that the accumulation of power control commands (also called the closed loop gain adjustment (CGA)) of the forward dedicated control channel (DCH) of remote unit A and B can be used to determine scheduling priority on the common channel due to the high correlation of the CGA level with the reported C/I measurements (see FIG. 5).). Scheduling the remote unit with the lowest CGA is similar to scheduling based on C/I measurements passed from the remote units.
- CGA closed loop gain adjustment
- FIG. 7. illustrates the different link fading parameters which in accordance with the method and system of the present invention.
- the scheduler uses these parameter to define its internal processing.
- the Doppler rate 507 is used to define the fading mode (slow, medium, fast) which is used in the scheduling process and the channel coherence period 503 is used to determine the scheduling window for a given Mobile Station.
- the actual channel gain during a constructive fade 504 is higher than the static channel reference point 505 by about 3-6 db. As a result, scheduling a transmission only during the constructive fade will provide a net gain during this packet.
- FIG. 8 illustrates the input to the scheduler from three different Mobile Stations 601 , 602 and 603 ; each subject to a different fade condition.
- the scheduler realizes that user one is in constructive fade at the beginning of the coherence time, and assigns the highest priority to packets directed to this user during the time slot 604 .
- the scheduler gives the highest priority to user three.
- the scheduler did not realize yet that user three is in a constructive fade, so the priority is assigned to user two, however the scheduler realizes that user two is well into the coherence period, and a fade is likely to happen within the 606 time slot.
- the scheduler assigns the channel again to user two, but this time at full rate as no fade is expected.
- the channel is assigned to user one.
- FIG. 9 illustrates a flow chart detailing how the channel data is processed accordance with the method and system of the present invention.
- the probability of the channel being in a constructive fade is scaled by a programmable parameter ‘A’ and combined with a priority Metric scaled by a programmable parameter ‘B’.
- the Priority metric is a result of the time a packet is waiting in the transmission Que. The longer the wait time, the higher the priority for a given packet to be selected regardless of the channel conditions.
- the scheduler selects the highest metric in the metric selector 702 .
- the rate determination 703 defines which rate to use based on the channel conditions 705 and the coherence time left in the fade cycle 706 .
- the packet is transmitted in block 706 .
- Block 707 resets the priority counters and the scheduling sequence starts all over again.
Abstract
A method and system for dynamic rate switching via medium access channel layer signaling is disclosed, wherein data rates for high data rate channels are automatically shifted up or down based on a predetermined metric. In a preferred embodiment, data rates are automatically shifted up or down based on transmit channel gain required to maintain a required signal to noise ratio.
Description
- The present invention is related in general to communication systems, and, more particularly, to an improved method and system for dynamic scheduling via channel quality feedback.
- Standards bodies such as the International Standards Organization (ISO) have adopted a layered approach for the reference model of a communication subsystem. The complete communication subsystem is broken down into a number of layers, each of which performs a well-defined function in the context of the overall communication subsystem. It operates according to a defined protocol by exchanging messages, both user data and additional control information, with a corresponding peer layer in a remote system. Each layer has a well-defined interface between itself and the layer immediately above and below. Consequently, the implementation of a particular protocol layer is independent of all other layers. The function of each layer is specified formally as a protocol that defines the set of rules and conventions used by the layer to communicate with a similar peer layer in another (remote) system. Each layer provides a defined set of services to the layer immediately above. It also uses the services provided by the layer immediately below it to transport the message units associated with the protocol to the remote peer layer.
- Communication systems, such as Code Division Multiple Access (CDMA) systems, communicate messages between infrastructure equipment and subscriber or mobile units. As used herein, a forward or downlink channel refers to data generated by cellular infrastructure equipment and transmitted for reception by a mobile communication unit, and a reverse or uplink channel refers to data generated by a mobile communication unit, such as a mobile cellular phone and transmitted for reception by the cellular infrastructure equipment, specifically a base station.
- At the most basic level, cdma2000 provides protocols and services that correspond to the bottom two layers of the ISO/OSI Reference Model (i.e.,
Layer 1—the Physical Layer, andLayer 2—the Link Layer) according to the general structure specified by the ITU for IMT-2000 systems. In cdma2000, a generalized multi-media service model is supported. This allows a combination of voice, packet data, and circuit data services to be operating concurrently (within the limitations of the air interface system capacity). Cdma2000 also includes a Quality of Service (QOS) control mechanism to balance the varying QOS requirements of multiple concurrent services. - One problem associated with the combination of voice, packet data, and circuit data services operating concurrently is the ability to maintain a high data rate connection at a required fixed error rate over a channel of varying quality. In addition, maximizing system capacity when high data rate channels are active presents another problem. Consequently, a need exists for a method and system for dynamic rate switching and scheduling control, wherein data rates for high data rate channels are automatically shifted up or down based on a channel quality feedback.
- The novel features believed characteristic of the invention are set forth in the appended claims. The invention itself, however, as well as a preferred mode of use, further objects, and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings, wherein:
- FIG. 1 depicts a communication system in accordance with the method and system of the present invention;
- FIG. 2 illustrates a block diagram of a communication system layer structure in accordance with the method and system of the present invention;
- FIG. 3 illustrates a fading profile of a typical wireless communication channel;
- FIG. 4. Scheduling based on C/I measurements provided by each remote unit A and B.
- FIG. 5. Shows that the forward dedicated control channel (DCH) voltage gain levels of remote unit A and B can be used to determine scheduling priority on the common channel.
- FIG. 6. Shows that the accumulation of power control commands (also called the closed loop gain adjustment (CGA)) of the forward dedicated control channel (DCH) of remote unit A and B.
- FIG. 7 illustrates the nature of the channel statistics and important channel metrics;
- FIG. 8 illustrates an example of scheduling a plurality of users based on the channel statistics in accordance with the method and system of the present invention;
- FIG. 9 illustrates a functional flow diagram depicting the process of base transceiver station transmit scheduling for a plurality of users in accordance with the method and system of the present invention;
- FIG. 1 depicts a
communication system 100 in accordance with the preferred embodiment of the present invention.System 100 includes amobile station 102, a firstbase transceiver station 104, a secondbase transceiver station 103, and a Centralized Base Station Controller (CBSC) 105. CBSC 105 includes atranscoder 106, and aselection distribution unit 111.System 100 preferably includes a plurality of mobile stations and base transceiver stations, but only one mobile station and two base transceiver stations are depicted in FIG. 1 for clarity. In a preferred embodiment,system 100 is a Code Division Multiple Access (CDMA) system.System 100 may also be any communication system that transmits signaling messages and requires accurate delivery and receipt by mobile stations. -
First base station 104 includes atransceiver 108 that includes a transmitter and a receiver.Second base station 103 includes atransceiver 107 that includes a transmitter and a receiver.Transceivers mobile unit 102. The transmission is well known in the art, and will not be described further in this application. Signals transmitted frombase stations mobile unit 102 are referred to herein as forward traffic frames, or as forward link messages. Transceivers 107 and 108 receive messages frommobile unit 102, as is well known in the art. Such messages are referred to herein as reverse link messages. -
Mobile unit 102 is preferably a cellular telephone unit that is capable of communicating withbase transceiver stations mobile unit 102 is a digital cellular CDMA telephone.Mobile unit 102 may also be a wireless data terminal or a videophone.Mobile unit 102 includes atransceiver 110 that includes a transmitter and a receiver, as is well known in the art.Mobile unit 102 communicates withbase stations transceiver 110 located therein on a reverse link, and by receiving messages generated bybase stations transceiver 110 located therein on the forward link. - In the preferred embodiment of the present invention, BTSs103 and 104 act as the central location for managing power control in
system 100. In an alternate embodiment of the present invention, CBSC 105 manages power control insystem 100. - FIG. 2 illustrates a block diagram of a communication
system layer structure 200 in accordance with the method and system of the present invention. In the preferred embodiment, FIG. 2 illustrates a block diagram of IS-95 and cdma2000 layer structure. However, it will be appreciated by those skilled in the art that other communication systems, such as CDMAOne, UMTS, and ARIB, have similar layer structures. As shown in FIG. 2, IS-95 has a layered structure providing voice, packet data, simple circuit data, and simultaneous voice and packet data services. It should be noted that the term “IS-95” includes any of the standards that are predecessors to cdma2000, i.e. IS-95-A, and TIA/EIA-95-B. At the most basic level, cdma2000 provides protocols and services that correspond to the bottom two layers of the ISO/OSI Reference Model (i.e.,Layer 1—thePhysical Layer 202, andLayer 2—the Link Layer 204) according to the general structure specified by the ITU for IMT-2000 systems.Layer 2 204 is further subdivided into the Link Access Control (LAC) sublayer 206 and the Medium Access Control (MAC)sublayer 208. In addition, a Quality of service (QOS)control mechanism 210 is included to balance the varying QOS requirements of multiple concurrent services. Applications and upper layer protocols corresponding to OSI Layers 3 through 7 utilize the services provided by the cdma2000 LAC services. Examples include signaling services, voice services, packet data applications(TCP/IP), and circuit data applications. - The design of the cdma2000 LAC and
MAC sublayers 206, 208 is motivated by many factors, among those being: the need to support a wide range of upper layer services; the requirement to provide for high efficiency and low latency for data services operating over a wide performance range; support for advanced QOS delivery of circuit and packet data services; and the demand for advanced multi-media services that support multiple concurrent voice, packet data, and circuit data services, each with varying QOS requirements. Thecdma2000 MAC sublayer 208 provides two important functions: (1) best effort delivery—reasonably reliable transmission over the radio link with a Radio Link Protocol (RLP) 212 that provides a best effort level of reliability; and (2) multiplexing and QOS control—enforcement of negotiated QOS levels by mediating conflicting requests from competing services and by the appropriate prioritization of access requests. The resolution of these conflicting requirements is handed to a scheduler that prioritizes the prepares the users and system requirements. - In the preferred embodiment, the Mobile Unit transmits channel quality feedback on the Reverse Link, which indicates the measured quality metrics of the forward link. These metrics can be explicit (actual values of channel signal to noise measurements such as C/I), implicit (power control commands) or a mixture of both. The channel quality metrics a fed into the scheduler which prepares the different transmission to the plurality of users and indicates the event to the
MAC 208. For these applications, portions of the MAC are moved to the Base Stations from the PDG andCBSC 105. - Placing the decision making on the Base Station side of the link, allows for more intelligent scheduling with low latency and fast turn around decision based on the link statistics.
- FIG. 3. The power control command behavior given rayleigh faded channel at 3 kph with 800 Hz feedback.
- FIG. 4. Scheduling based on C/I measurements provided by each remote unit A and B. In the preferred embodiment of the present invention the scheduling may be for a common channel (such as a pilot channel) shared by a plurality of mobile units. The remote unit reporting the strongest C/I is scheduled first, where the actual modulation (QPSK, 16QAM, 64QAM) and the encoding rate used (½ or ¾) is determined by the strength of the C/I and other metrics available at the basestation indicating the available bandwidth for each remote unit. If enough bandwidth is available and the remote unit's C/I are strong enough then both can be scheduled for the same time interval using separate orthogonal codes.
- FIG. 5. Shows that the forward dedicated control channel (DCH) voltage gain levels of remote unit A and B can be used to determine scheduling priority on the common channel due to the high correlation of the gain with the reported C/I measurements (see FIG. 5). Scheduling the remote unit with the lowest DCH voltage gain is similar to scheduling based on C/I measurements passed from the remote units.
- FIG. 6. Shows that the accumulation of power control commands (also called the closed loop gain adjustment (CGA)) of the forward dedicated control channel (DCH) of remote unit A and B can be used to determine scheduling priority on the common channel due to the high correlation of the CGA level with the reported C/I measurements (see FIG. 5).). Scheduling the remote unit with the lowest CGA is similar to scheduling based on C/I measurements passed from the remote units.
- FIG. 7. illustrates the different link fading parameters which in accordance with the method and system of the present invention. The scheduler uses these parameter to define its internal processing. For example, the
Doppler rate 507 is used to define the fading mode (slow, medium, fast) which is used in the scheduling process and thechannel coherence period 503 is used to determine the scheduling window for a given Mobile Station. It is noted that the actual channel gain during aconstructive fade 504 is higher than the staticchannel reference point 505 by about 3-6 db. As a result, scheduling a transmission only during the constructive fade will provide a net gain during this packet. - FIG. 8 illustrates the input to the scheduler from three
different Mobile Stations time slot 604. Fortime slot 605, the scheduler gives the highest priority to user three. Duringtimeslot 606, the scheduler did not realize yet that user three is in a constructive fade, so the priority is assigned to user two, however the scheduler realizes that user two is well into the coherence period, and a fade is likely to happen within the 606 time slot. As a result the user two is assigned a lower transmission rate during 606 to allow for the higher possibility of a fade in this time slot. Duringtime slot 607, the scheduler assigns the channel again to user two, but this time at full rate as no fade is expected. Duringtime slot 608, the channel is assigned to user one. - FIG. 9 illustrates a flow chart detailing how the channel data is processed accordance with the method and system of the present invention. In the
metric calculation module 701, the probability of the channel being in a constructive fade is scaled by a programmable parameter ‘A’ and combined with a priority Metric scaled by a programmable parameter ‘B’. The Priority metric is a result of the time a packet is waiting in the transmission Que. The longer the wait time, the higher the priority for a given packet to be selected regardless of the channel conditions. Following themetric generation 701, the scheduler selects the highest metric in themetric selector 702. One the packet to be transmitted, or Mobile station to be serviced is known, therate determination 703 defines which rate to use based on thechannel conditions 705 and the coherence time left in thefade cycle 706. The packet is transmitted inblock 706.Block 707 resets the priority counters and the scheduling sequence starts all over again. - The foregoing description of a preferred embodiment of the invention has been presented for the purpose of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Obvious modifications or variations are possible in light of the above teachings. The embodiment was chosen and described to provide the best illustration of the principles of the invention and its practical application, and to enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly, legally, and equitably entitled.
Claims (7)
1. A method for scheduling a plurality of mobile units for data transmission, the method comprising the steps of:
determining a plurality of mobile units that require data transmission;
determine power control feedback information for each mobile unit within the plurality of mobile units that require data transmission; and
schedule the plurality of mobile units for data transmission based on their power control feedback information.
2. The method of further comprises the step of determining C/I information for each mobile unit within the plurality of mobile units and scheduling the plurality of mobile units additionally based on C/I.
claim 1
3. The method of wherein the step of scheduling the plurality of mobile units for data transmission comprises the step of scheduling the plurality of mobile units for data transmission over a common channel shared by the plurality of mobile units.
claim 1
4. The method of wherein the step of determining C/I information for each mobile unit comprises the step of determining feedback information of a common channel.
claim 2
5. An apparatus for scheduling mobile units for data transmission, the apparatus comprising:
a channel statistic estimator, wherein the channel statistic estimator has power control information for a plurality of mobile units as an input and outputs a power-control statistic based on the power control information;
a scheduler having the power-control statistic as an input and outputting scheduled mobile units based on the power control statistic.
6. The apparatus of wherein the channel statistic estimator additionally has C/I feedback information for the plurality of mobile units as an input and outputs a statistic based on both power control and C/I information for each mobile unit.
claim 5
7. The apparatus of wherein the C/I information is C/I feedback information for a common channel shared by the plurality of mobile units.
claim 6
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/840,538 US20010040877A1 (en) | 2000-05-09 | 2001-04-23 | Method of dynamic transmit scheduling using channel quality feedback |
JP2001582926A JP2003533122A (en) | 2000-05-09 | 2001-05-04 | Dynamic transmission scheduling method using channel quality feedback |
PCT/US2001/014516 WO2001086826A2 (en) | 2000-05-09 | 2001-05-04 | Method of dynamic transmit scheduling using channel quality feedback |
EP01935079A EP1282950B1 (en) | 2000-05-09 | 2001-05-04 | Method of downlink dynamic scheduling using channel quality feedback |
US10/886,962 US7397803B2 (en) | 2000-05-09 | 2004-07-08 | Method of dynamic transmit scheduling using channel quality feedback |
JP2006317009A JP4369463B2 (en) | 2000-05-09 | 2006-11-24 | Method and apparatus for scheduling a plurality of mobile devices for data transmission |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20263200P | 2000-05-09 | 2000-05-09 | |
US09/840,538 US20010040877A1 (en) | 2000-05-09 | 2001-04-23 | Method of dynamic transmit scheduling using channel quality feedback |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/886,962 Division US7397803B2 (en) | 2000-05-09 | 2004-07-08 | Method of dynamic transmit scheduling using channel quality feedback |
Publications (1)
Publication Number | Publication Date |
---|---|
US20010040877A1 true US20010040877A1 (en) | 2001-11-15 |
Family
ID=26897886
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/840,538 Abandoned US20010040877A1 (en) | 2000-05-09 | 2001-04-23 | Method of dynamic transmit scheduling using channel quality feedback |
US10/886,962 Expired - Lifetime US7397803B2 (en) | 2000-05-09 | 2004-07-08 | Method of dynamic transmit scheduling using channel quality feedback |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/886,962 Expired - Lifetime US7397803B2 (en) | 2000-05-09 | 2004-07-08 | Method of dynamic transmit scheduling using channel quality feedback |
Country Status (4)
Country | Link |
---|---|
US (2) | US20010040877A1 (en) |
EP (1) | EP1282950B1 (en) |
JP (2) | JP2003533122A (en) |
WO (1) | WO2001086826A2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020071445A1 (en) * | 2000-12-07 | 2002-06-13 | Geng Wu | Method and apparatus for the transmission of short data bursts in CDMA/HDR networks |
US20020089952A1 (en) * | 2000-11-22 | 2002-07-11 | Qiang Cao | Method and system for UMTS packet transmission scheduling on shared downlink channels |
WO2003055266A1 (en) * | 2001-12-20 | 2003-07-03 | Qualcomm Incorporated | Acknowledging missed messages broadcast on a control channel |
US20030210664A1 (en) * | 2002-05-10 | 2003-11-13 | Baaziz Achour | Method and apparatus for a reverse link supplemental channel scheduling |
WO2003096553A2 (en) * | 2002-05-10 | 2003-11-20 | Interdigital Technology Corporation | Cognitive flow control based on channel quality conditions |
US20040141466A1 (en) * | 2003-01-08 | 2004-07-22 | Samsung Electronics Co., Ltd. | Apparatus and method for estimating a channel condition of a forward link in a mobile communication system |
US20040190507A1 (en) * | 2003-03-25 | 2004-09-30 | Qiang Wu | Adaptive rate prioritizing |
US7463616B1 (en) * | 2002-03-28 | 2008-12-09 | Nortel Networks Limited | Scheduling based on channel change indicia |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7155246B2 (en) * | 1999-06-30 | 2006-12-26 | Qualcomm, Incorporated | Transmitter directed code division multiple access system using multi-users diversity to maximize throughput while equitably providing access to users |
GB0104610D0 (en) * | 2001-02-23 | 2001-04-11 | Koninkl Philips Electronics Nv | Radio communication system |
US6662024B2 (en) * | 2001-05-16 | 2003-12-09 | Qualcomm Incorporated | Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system |
JP4198921B2 (en) | 2002-02-28 | 2008-12-17 | 株式会社エヌ・ティ・ティ・ドコモ | Adaptive radio parameter control method, QoS control device, base station, and radio communication system |
US8009607B2 (en) * | 2002-04-24 | 2011-08-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for uplink transmission timing in a mobile communications system |
US7218948B2 (en) * | 2003-02-24 | 2007-05-15 | Qualcomm Incorporated | Method of transmitting pilot tones in a multi-sector cell, including null pilot tones, for generating channel quality indicators |
US9544860B2 (en) * | 2003-02-24 | 2017-01-10 | Qualcomm Incorporated | Pilot signals for use in multi-sector cells |
US9661519B2 (en) | 2003-02-24 | 2017-05-23 | Qualcomm Incorporated | Efficient reporting of information in a wireless communication system |
US8811348B2 (en) * | 2003-02-24 | 2014-08-19 | Qualcomm Incorporated | Methods and apparatus for generating, communicating, and/or using information relating to self-noise |
JP3847733B2 (en) * | 2003-06-12 | 2006-11-22 | 松下電器産業株式会社 | Multi-carrier communication method and communication apparatus therefor |
EP1658697A1 (en) * | 2003-08-21 | 2006-05-24 | Koninklijke Philips Electronics N.V. | Wireless transmission control in uwb (ultra wide band) technology |
NZ555079A (en) | 2004-10-14 | 2010-04-30 | Qualcomm Inc | Methods and apparatus for determining, communicating and using information which can be used for interference control purposes |
US8503938B2 (en) | 2004-10-14 | 2013-08-06 | Qualcomm Incorporated | Methods and apparatus for determining, communicating and using information including loading factors which can be used for interference control purposes |
US9191840B2 (en) * | 2005-10-14 | 2015-11-17 | Qualcomm Incorporated | Methods and apparatus for determining, communicating and using information which can be used for interference control |
US8989084B2 (en) | 2005-10-14 | 2015-03-24 | Qualcomm Incorporated | Methods and apparatus for broadcasting loading information corresponding to neighboring base stations |
US9338767B2 (en) * | 2005-12-22 | 2016-05-10 | Qualcomm Incorporated | Methods and apparatus of implementing and/or using a dedicated control channel |
US9125092B2 (en) | 2005-12-22 | 2015-09-01 | Qualcomm Incorporated | Methods and apparatus for reporting and/or using control information |
US20070149132A1 (en) | 2005-12-22 | 2007-06-28 | Junyl Li | Methods and apparatus related to selecting control channel reporting formats |
US9451491B2 (en) * | 2005-12-22 | 2016-09-20 | Qualcomm Incorporated | Methods and apparatus relating to generating and transmitting initial and additional control information report sets in a wireless system |
US9125093B2 (en) * | 2005-12-22 | 2015-09-01 | Qualcomm Incorporated | Methods and apparatus related to custom control channel reporting formats |
US20070249360A1 (en) * | 2005-12-22 | 2007-10-25 | Arnab Das | Methods and aparatus related to determining, communicating, and/or using delay information in a wireless communications system |
US8437251B2 (en) | 2005-12-22 | 2013-05-07 | Qualcomm Incorporated | Methods and apparatus for communicating transmission backlog information |
US8514771B2 (en) | 2005-12-22 | 2013-08-20 | Qualcomm Incorporated | Methods and apparatus for communicating and/or using transmission power information |
US9473265B2 (en) | 2005-12-22 | 2016-10-18 | Qualcomm Incorporated | Methods and apparatus for communicating information utilizing a plurality of dictionaries |
US9572179B2 (en) | 2005-12-22 | 2017-02-14 | Qualcomm Incorporated | Methods and apparatus for communicating transmission backlog information |
US9137072B2 (en) * | 2005-12-22 | 2015-09-15 | Qualcomm Incorporated | Methods and apparatus for communicating control information |
US9148795B2 (en) * | 2005-12-22 | 2015-09-29 | Qualcomm Incorporated | Methods and apparatus for flexible reporting of control information |
US9119220B2 (en) * | 2005-12-22 | 2015-08-25 | Qualcomm Incorporated | Methods and apparatus for communicating backlog related information |
US20070243882A1 (en) | 2006-04-12 | 2007-10-18 | Qualcomm Incorporated | Method and apparatus for locating a wireless local area network associated with a wireless wide area network |
GB2453979B (en) * | 2007-10-24 | 2010-01-06 | Motorola Inc | Scheduling of data packets over an air interface of a cellular communication system |
JP2008295070A (en) * | 2008-07-03 | 2008-12-04 | Ntt Docomo Inc | Adaptive radio parameter control method, qos control apparatus, base station and radio communication system |
WO2011070597A1 (en) | 2009-12-09 | 2011-06-16 | Grossi Lamiere S.R.L. | Apparatus and process for manufacturing of decorative panels and relevant decorative panel |
US8811513B2 (en) * | 2010-02-05 | 2014-08-19 | Qualcomm Incorporated | Antenna switching in a closed loop transmit diversity system |
US8345616B2 (en) | 2010-06-24 | 2013-01-01 | Microsoft Corporation | Scheduling communications in a mobile device |
US8923137B2 (en) * | 2012-02-06 | 2014-12-30 | Qualcomm Incorporated | System and method for information verification based on channel awareness |
US8843169B2 (en) * | 2012-08-06 | 2014-09-23 | Microsoft Corporation | Signal-aware data transfer in cellular networks |
EP3455976A1 (en) * | 2016-05-13 | 2019-03-20 | Sony Mobile Communications Inc. | Timing relationships of pilot and data for mobile network communications |
Citations (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5309503A (en) * | 1991-12-06 | 1994-05-03 | Motorola, Inc. | Dynamic channel assignment in a communication system |
US5327576A (en) * | 1990-08-23 | 1994-07-05 | Telefonakitebolaget L M Ericsson | Handoff of a mobile station between half rate and full rate channels |
US5345598A (en) * | 1992-04-10 | 1994-09-06 | Ericsson-Ge Mobile Communications Holding, Inc. | Duplex power control system in a communication network |
US5687162A (en) * | 1994-08-11 | 1997-11-11 | Nec Corporation | DS/CDMA receiver having an interference cancelling function capable of asssuring a desired reception quality in a narrow-band DS/CDMA |
US5999534A (en) * | 1996-12-26 | 1999-12-07 | Daewoo Electronics Co., Ltd. | Method and apparatus for scheduling cells for use in a static priority scheduler |
US6023623A (en) * | 1995-02-16 | 2000-02-08 | Detemobil Deutsche Telekom Mobilnet Gmbh | Process for dynamic channel allocation in mobile radio networks |
US6052594A (en) * | 1997-04-30 | 2000-04-18 | At&T Corp. | System and method for dynamically assigning channels for wireless packet communications |
US6069883A (en) * | 1995-10-05 | 2000-05-30 | Lucent Technologies Inc | Code division multiple access system providing enhanced load and interference based demand assignment service to users |
US6108316A (en) * | 1997-07-25 | 2000-08-22 | At & T Corp | Adaptive scheduling priorities based on battery power level in wireless access protocols |
US6134220A (en) * | 1994-04-13 | 2000-10-17 | Alcatel Cit | Method of adapting the air interface in a mobile radio system and corresponding base transceiver station, mobile station and transmission mode |
US6134230A (en) * | 1997-08-29 | 2000-10-17 | Telefonaktiebolaget Lm Ericsson | Method for selecting a link protocol for a transparent data service in a digital communications system |
US6167031A (en) * | 1997-08-29 | 2000-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for selecting a combination of modulation and channel coding schemes in a digital communication system |
US20010000168A1 (en) * | 1996-11-27 | 2001-04-05 | Riaz Esmailzadeh | Transmission power control method and apparatus for mobile communication system |
US6289217B1 (en) * | 1997-09-17 | 2001-09-11 | Nokia Mobile Phones Ltd. | Adaptive radio link |
US20010029189A1 (en) * | 2000-02-01 | 2001-10-11 | Mandyam Giridhar D. | Apparatus, and associated method, for selectably permitting communication of burst data in a radio communication system |
US20010030956A1 (en) * | 2000-01-07 | 2001-10-18 | Gopal Chillariga | Dynamic channel allocation in multiple-access communication systems |
US20010033560A1 (en) * | 2000-01-20 | 2001-10-25 | Wen Tong | Flexible frame structures in adaptive high data rate wirelesss access systems |
US6335922B1 (en) * | 1997-02-11 | 2002-01-01 | Qualcomm Incorporated | Method and apparatus for forward link rate scheduling |
US6374112B1 (en) * | 1998-04-03 | 2002-04-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Flexible radio access and resource allocation in a universal mobile telephone system |
US6396867B1 (en) * | 1997-04-25 | 2002-05-28 | Qualcomm Incorporated | Method and apparatus for forward link power control |
US6493331B1 (en) * | 2000-03-30 | 2002-12-10 | Qualcomm Incorporated | Method and apparatus for controlling transmissions of a communications systems |
US6512752B1 (en) * | 1999-12-30 | 2003-01-28 | Ericsson Inc. | Adaptive carrier assignment in multiple reuse patterns for packet data systems based on service type and user location |
US6526062B1 (en) * | 1998-10-13 | 2003-02-25 | Verizon Corporate Services Group Inc. | System and method for scheduling and rescheduling the transmission of cell objects of different traffic types |
US6542742B2 (en) * | 1998-04-01 | 2003-04-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Cell selection in mobile radio systems |
US6546017B1 (en) * | 1999-03-05 | 2003-04-08 | Cisco Technology, Inc. | Technique for supporting tiers of traffic priority levels in a packet-switched network |
US6603753B1 (en) * | 1999-12-03 | 2003-08-05 | Lucent Technologies Inc. | Down-link transmission inter-cell scheduling in CDMA data networks |
US6608827B1 (en) * | 1999-02-01 | 2003-08-19 | Bellsouth Intellectual Property Corporation | Method for increasing the communication capacity of a cellular telephone system |
US6748233B1 (en) * | 1999-10-28 | 2004-06-08 | Telcordia Technologies, Inc. | System and method for energy-efficient transmission power control, routing and transmission scheduling in wireless communication networks |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE503893C2 (en) * | 1994-07-15 | 1996-09-30 | Ericsson Telefon Ab L M | Method and apparatus for frequency hopping in a radio communication system |
EP0741467A2 (en) * | 1995-04-25 | 1996-11-06 | AT&T IPM Corp. | A method and apparatus for power control in wireless networks |
JPH10173594A (en) * | 1996-12-06 | 1998-06-26 | Hitachi Ltd | Code division multiple access communication system and sending power control method |
JP3652837B2 (en) * | 1997-05-12 | 2005-05-25 | シャープ株式会社 | TDMA communication system |
US6377809B1 (en) * | 1997-09-16 | 2002-04-23 | Qualcomm Incorporated | Channel structure for communication systems |
US6574211B2 (en) * | 1997-11-03 | 2003-06-03 | Qualcomm Incorporated | Method and apparatus for high rate packet data transmission |
US6208835B1 (en) * | 1998-07-01 | 2001-03-27 | Hughes Electronics Corporation | Methods for enhancing service and reducing service cost in mobile satellite systems |
ES2247734T3 (en) * | 1998-11-11 | 2006-03-01 | Nokia Corporation | METHOD AND APPARATUS FOR DIRECTIONAL RADIOCOMMUNICATION. |
US6229795B1 (en) * | 1999-01-13 | 2001-05-08 | Qualcomm Incorporated | System for allocating resources in a communication system |
US6965590B1 (en) * | 2000-02-29 | 2005-11-15 | Texas Instruments Incorporated | Dynamic slave selection in frequency hopping wireless communications |
EP1264422B1 (en) * | 2000-03-17 | 2007-12-26 | QUALCOMM Incorporated | Forward-link scheduling in a wireless communication system |
-
2001
- 2001-04-23 US US09/840,538 patent/US20010040877A1/en not_active Abandoned
- 2001-05-04 WO PCT/US2001/014516 patent/WO2001086826A2/en active Application Filing
- 2001-05-04 EP EP01935079A patent/EP1282950B1/en not_active Expired - Lifetime
- 2001-05-04 JP JP2001582926A patent/JP2003533122A/en not_active Ceased
-
2004
- 2004-07-08 US US10/886,962 patent/US7397803B2/en not_active Expired - Lifetime
-
2006
- 2006-11-24 JP JP2006317009A patent/JP4369463B2/en not_active Expired - Lifetime
Patent Citations (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5327576A (en) * | 1990-08-23 | 1994-07-05 | Telefonakitebolaget L M Ericsson | Handoff of a mobile station between half rate and full rate channels |
US5309503A (en) * | 1991-12-06 | 1994-05-03 | Motorola, Inc. | Dynamic channel assignment in a communication system |
US5345598A (en) * | 1992-04-10 | 1994-09-06 | Ericsson-Ge Mobile Communications Holding, Inc. | Duplex power control system in a communication network |
US6134220A (en) * | 1994-04-13 | 2000-10-17 | Alcatel Cit | Method of adapting the air interface in a mobile radio system and corresponding base transceiver station, mobile station and transmission mode |
US5687162A (en) * | 1994-08-11 | 1997-11-11 | Nec Corporation | DS/CDMA receiver having an interference cancelling function capable of asssuring a desired reception quality in a narrow-band DS/CDMA |
US6023623A (en) * | 1995-02-16 | 2000-02-08 | Detemobil Deutsche Telekom Mobilnet Gmbh | Process for dynamic channel allocation in mobile radio networks |
US6069883A (en) * | 1995-10-05 | 2000-05-30 | Lucent Technologies Inc | Code division multiple access system providing enhanced load and interference based demand assignment service to users |
US20010000168A1 (en) * | 1996-11-27 | 2001-04-05 | Riaz Esmailzadeh | Transmission power control method and apparatus for mobile communication system |
US5999534A (en) * | 1996-12-26 | 1999-12-07 | Daewoo Electronics Co., Ltd. | Method and apparatus for scheduling cells for use in a static priority scheduler |
US6335922B1 (en) * | 1997-02-11 | 2002-01-01 | Qualcomm Incorporated | Method and apparatus for forward link rate scheduling |
US6396867B1 (en) * | 1997-04-25 | 2002-05-28 | Qualcomm Incorporated | Method and apparatus for forward link power control |
US6052594A (en) * | 1997-04-30 | 2000-04-18 | At&T Corp. | System and method for dynamically assigning channels for wireless packet communications |
US6108316A (en) * | 1997-07-25 | 2000-08-22 | At & T Corp | Adaptive scheduling priorities based on battery power level in wireless access protocols |
US6167031A (en) * | 1997-08-29 | 2000-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for selecting a combination of modulation and channel coding schemes in a digital communication system |
US6134230A (en) * | 1997-08-29 | 2000-10-17 | Telefonaktiebolaget Lm Ericsson | Method for selecting a link protocol for a transparent data service in a digital communications system |
US6289217B1 (en) * | 1997-09-17 | 2001-09-11 | Nokia Mobile Phones Ltd. | Adaptive radio link |
US6542742B2 (en) * | 1998-04-01 | 2003-04-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Cell selection in mobile radio systems |
US6374112B1 (en) * | 1998-04-03 | 2002-04-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Flexible radio access and resource allocation in a universal mobile telephone system |
US6526062B1 (en) * | 1998-10-13 | 2003-02-25 | Verizon Corporate Services Group Inc. | System and method for scheduling and rescheduling the transmission of cell objects of different traffic types |
US6608827B1 (en) * | 1999-02-01 | 2003-08-19 | Bellsouth Intellectual Property Corporation | Method for increasing the communication capacity of a cellular telephone system |
US6546017B1 (en) * | 1999-03-05 | 2003-04-08 | Cisco Technology, Inc. | Technique for supporting tiers of traffic priority levels in a packet-switched network |
US6748233B1 (en) * | 1999-10-28 | 2004-06-08 | Telcordia Technologies, Inc. | System and method for energy-efficient transmission power control, routing and transmission scheduling in wireless communication networks |
US6603753B1 (en) * | 1999-12-03 | 2003-08-05 | Lucent Technologies Inc. | Down-link transmission inter-cell scheduling in CDMA data networks |
US6512752B1 (en) * | 1999-12-30 | 2003-01-28 | Ericsson Inc. | Adaptive carrier assignment in multiple reuse patterns for packet data systems based on service type and user location |
US20010030956A1 (en) * | 2000-01-07 | 2001-10-18 | Gopal Chillariga | Dynamic channel allocation in multiple-access communication systems |
US20010033560A1 (en) * | 2000-01-20 | 2001-10-25 | Wen Tong | Flexible frame structures in adaptive high data rate wirelesss access systems |
US20010038630A1 (en) * | 2000-01-20 | 2001-11-08 | Wen Tong | Multi-carrier arrangement for high speed data |
US20010029189A1 (en) * | 2000-02-01 | 2001-10-11 | Mandyam Giridhar D. | Apparatus, and associated method, for selectably permitting communication of burst data in a radio communication system |
US6493331B1 (en) * | 2000-03-30 | 2002-12-10 | Qualcomm Incorporated | Method and apparatus for controlling transmissions of a communications systems |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020089952A1 (en) * | 2000-11-22 | 2002-07-11 | Qiang Cao | Method and system for UMTS packet transmission scheduling on shared downlink channels |
US7190684B2 (en) * | 2000-11-22 | 2007-03-13 | Lucent Technologies Inc. | Method and system for UMTS packet transmission scheduling on shared downlink channels |
US6952426B2 (en) * | 2000-12-07 | 2005-10-04 | Nortel Networks Limited | Method and apparatus for the transmission of short data bursts in CDMA/HDR networks |
US20020071445A1 (en) * | 2000-12-07 | 2002-06-13 | Geng Wu | Method and apparatus for the transmission of short data bursts in CDMA/HDR networks |
WO2003055266A1 (en) * | 2001-12-20 | 2003-07-03 | Qualcomm Incorporated | Acknowledging missed messages broadcast on a control channel |
US6993352B2 (en) | 2001-12-20 | 2006-01-31 | Qualcomm Incorporated | Acknowledging missed messages broadcast on a control channel |
US7463616B1 (en) * | 2002-03-28 | 2008-12-09 | Nortel Networks Limited | Scheduling based on channel change indicia |
WO2003096553A3 (en) * | 2002-05-10 | 2003-12-24 | Interdigital Tech Corp | Cognitive flow control based on channel quality conditions |
US7480270B2 (en) | 2002-05-10 | 2009-01-20 | Qualcomm, Incorporated | Method and apparatus for a reverse link supplemental channel scheduling |
US10631197B2 (en) | 2002-05-10 | 2020-04-21 | Signal Trust For Wireless Innovation | Cognitive flow control based on channel quality conditions |
US20040027997A1 (en) * | 2002-05-10 | 2004-02-12 | Interdigital Technology Corporation | Cognitive flow control based on channel quality conditions |
WO2003096739A1 (en) * | 2002-05-10 | 2003-11-20 | Qualcomm, Incorporated | Method and apparatus for a reverse link supplemental channel scheduling |
WO2003096553A2 (en) * | 2002-05-10 | 2003-11-20 | Interdigital Technology Corporation | Cognitive flow control based on channel quality conditions |
US9781629B2 (en) | 2002-05-10 | 2017-10-03 | Signal Trust For Wireless Innovation | Cognitive flow control based on channel quality conditions |
US9369917B2 (en) | 2002-05-10 | 2016-06-14 | Signal Trust For Wireless Innovation | Cognitive flow control based on channel quality conditions |
US20030210664A1 (en) * | 2002-05-10 | 2003-11-13 | Baaziz Achour | Method and apparatus for a reverse link supplemental channel scheduling |
US8942200B2 (en) | 2002-05-10 | 2015-01-27 | Signal Trust For Wireless Innovation | Cognitive flow control based on channel quality conditions |
US8175030B2 (en) | 2002-05-10 | 2012-05-08 | Interdigital Technology Corporation | Cognitive flow control based on channel quality conditions |
CN101242363B (en) * | 2002-05-10 | 2012-11-07 | 美商内数位科技公司 | Cognitive flow control based on channel quality conditions |
US8379575B2 (en) | 2002-05-10 | 2013-02-19 | Interdigital Technology Corporation | Cognitive flow control based on channel quality conditions |
US20040141466A1 (en) * | 2003-01-08 | 2004-07-22 | Samsung Electronics Co., Ltd. | Apparatus and method for estimating a channel condition of a forward link in a mobile communication system |
US7321563B2 (en) * | 2003-01-08 | 2008-01-22 | Samsung Electronics Co., Ltd. | Apparatus and method for estimating a channel condition of a forward link in a mobile communication system |
US7369549B2 (en) * | 2003-03-25 | 2008-05-06 | Qualcomm Incorporated | Adaptive rate prioritizing |
US20040190507A1 (en) * | 2003-03-25 | 2004-09-30 | Qiang Wu | Adaptive rate prioritizing |
Also Published As
Publication number | Publication date |
---|---|
WO2001086826A3 (en) | 2002-03-28 |
US7397803B2 (en) | 2008-07-08 |
JP2003533122A (en) | 2003-11-05 |
EP1282950A4 (en) | 2003-08-06 |
EP1282950A2 (en) | 2003-02-12 |
JP2007060723A (en) | 2007-03-08 |
EP1282950B1 (en) | 2008-08-06 |
US20050003847A1 (en) | 2005-01-06 |
JP4369463B2 (en) | 2009-11-18 |
WO2001086826A2 (en) | 2001-11-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7397803B2 (en) | Method of dynamic transmit scheduling using channel quality feedback | |
US9832735B2 (en) | Uplink power control using received power control information | |
US9674798B2 (en) | Transport format combination selecting method, wireless communication system, and mobile station | |
RU2420883C2 (en) | Method for efficient management of radio resources | |
EP1871131B1 (en) | Mobile communication system, mobile station, base station, and communication control method | |
US7327716B2 (en) | Reverse link enhancement for CDMA 2000 Release D | |
KR100987204B1 (en) | Method and system for a data transmission in a communication system | |
EP1309120A1 (en) | A method for allocating wireless communication resources | |
US20080064386A1 (en) | Uplink communication method and radio terminal in radio communication system | |
US9413677B1 (en) | Dynamic adjustment of reverse-link rate-control parameters | |
US7092717B2 (en) | Method and system for a dynamic adjustment of a data request channel in a communication system | |
US20070105593A1 (en) | Equalizing signal-to-interference ratios of different physical channels supporting a coded composite transport channel | |
US7856210B2 (en) | Power step control for high-speed downlink shared channel packet access | |
WO2005117363A1 (en) | Method and arrangement for uplink scheduling | |
KR101086726B1 (en) | Method for operating a radio station and a subscriber station of a radio communication system, and corresponding radio station and subscriber station | |
KR101100776B1 (en) | Method, user station and network device for radio communication in particular in connection with hsdpa service | |
KR20000071571A (en) | Method for premature termination of burst transmission in wireless communication systems |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MOTOROLA, INC., ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LOVE, ROBERT T.;ROTSTEIN, RON;CUDAK, MARK C.;AND OTHERS;REEL/FRAME:011735/0168;SIGNING DATES FROM 20010419 TO 20010420 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE |
|
AS | Assignment |
Owner name: GOOGLE TECHNOLOGY HOLDINGS LLC, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOTOROLA MOBILITY LLC;REEL/FRAME:035464/0012 Effective date: 20141028 |