Methods and apparatuses for power control in wireless communications
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04W-052/02
H04W-080/04
H04W-088/06
H04W-028/04
H04W-072/04
H04W-052/24
H04W-052/50
H04W-052/34
H04W-052/14
H04W-052/54
H04W-052/58
출원번호
US-0898269
(2013-05-20)
등록번호
US-9155053
(2015-10-06)
발명자
/ 주소
Damnjanovic, Aleksandar
출원인 / 주소
QUALCOMM Incorporated
대리인 / 주소
Do, Liem T.
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
Downlink power control commands are mapped to resources used for uplink communications within a wireless communication system. A base station receives communications from UEs and determines the resources used by the UEs for those transmissions on the uplink which are transmitted at non-optimum power
Downlink power control commands are mapped to resources used for uplink communications within a wireless communication system. A base station receives communications from UEs and determines the resources used by the UEs for those transmissions on the uplink which are transmitted at non-optimum power levels. Power control messages are formulated wherein the location of the power control commands is mapped to particular resources used by the UEs for their uplink transmissions. This facilitates the base station to dynamically assign resources for the power control commands while permitting the UEs to decode the power control messages to adjust their power accordingly.
대표청구항▼
1. A method for controlling power within a wireless communication system, the method comprising: receiving uplink communications from a plurality of user equipments (UEs);determining that the uplink communications have been transmitted at a non-optimal power level by comparing one or more attributes
1. A method for controlling power within a wireless communication system, the method comprising: receiving uplink communications from a plurality of user equipments (UEs);determining that the uplink communications have been transmitted at a non-optimal power level by comparing one or more attributes associated with the uplink communications to thresholds for the one or more attributes;determining the identity and number of resource blocks employed by each UE of the plurality of UEs that transmitted the uplink communications at the non-optimal power level;generating power control messages for the plurality of UEs, wherein positions of power control commands within the power control messages are mapped respectively to the identified resource blocks employed by the plurality of UEs that transmitted the uplink communications at the non-optimal power level, and wherein a number of power control commands for controlling power of a respective UE is equal to the number of resource blocks determined to be employed by the respective UE for its uplink transmissions; andtransmitting the power control messages to the plurality of UEs. 2. The method of claim 1, wherein the power control messages comprise a bitmap that communicates the power control commands. 3. The method of claim 2, wherein the power control commands are bits within the bitmap and a location of the bits within the bitmap is mapped to the resource blocks employed by the respective UEs. 4. The method of claim 3, wherein a number of bits for controlling power of the respective UE is associated with the number of resource blocks utilized by the respective UE for its uplink communications. 5. The method of claim 1, wherein the transmitting the power control messages comprises transmitting at least one common power control message to the plurality of UEs. 6. The method of claim 1, wherein the transmitting the power control messages comprises transmitting individual power control messages comprising power control bits to each of the UEs. 7. The method of claim 1, further comprising indexing the resource blocks employed by the respective UEs. 8. The method of claim 7, wherein the power control messages comprise bits associated with the indexed resource blocks in addition to bits associated with the power control commands. 9. The method of claim 7, further comprising grouping the UEs based at least on their estimated radio conditions. 10. The method of claim 9, wherein the transmitting the power control messages comprises transmitting group power control commands to one or more of the UE groups. 11. The method of claim 1, wherein at least one of the UEs transmits a plurality of data streams concurrently at different frequencies and the power control messages individually adjust power of the resource blocks employed for the data streams being transmitted at the non-optimal power level. 12. An apparatus for conveying power control information within a communication system, the apparatus comprising: at least one processor configured to: receive uplink communications from a plurality of user equipments (UEs),determine that the uplink communications have been transmitted at a non-optimal power level by comparing one or more attributes associated with the uplink communications to thresholds for the one or more attributes,determine the identity and number of resource blocks employed by each UE of the plurality of UEs that transmitted the uplink communications at the non-optimal power level,generate power control messages for the plurality of UEs, wherein positions of power control commands within the power control messages are mapped respectively to the identified resource blocks employed by the plurality of UEs that transmitted the uplink communications at the non-optimal power level, and wherein a number of power control commands for controlling power of a respective UE is equal to the number of resource blocks determined to be employed by the respective UE for its uplink transmissions andtransmit the power control messages to the plurality of UEs; anda memory coupled to the at least one processor. 13. A computer program product comprising: a non-transitory computer-readable medium comprising: code for causing at least one computer to receive uplink communications from a plurality of user equipments (UEs),code for causing the at least one computer to determine that the uplink communications have been transmitted at a non-optimal power level by comparing one or more attributes associated with the uplink communications to thresholds for the one or more attributes,code for causing the at least one computer to determine the identity and number of resource blocks employed by each UE of the plurality of UEs that transmitted the uplink communications at the non-optimal power level,code for causing the at least one computer to generate power control messages for the plurality of UEs, wherein positions of power control commands within the power control messages are mapped respectively to the identified resource blocks employed by the plurality of UEs that transmitted the uplink communications at the non-optimal power level, and wherein a number of power control commands for controlling power of a respective UE is equal to the number of resource blocks determined to be employed by the respective UE for its uplink transmissions, andcode for causing the at least one computer to transmit the power control messages to the plurality of UEs. 14. A wireless communications apparatus for communicating power control information, the system comprising: means for receiving uplink communications from a plurality of user equipments (UEs);means for determining that the uplink communications have been transmitted at a non-optimal power level by comparing one or more attributes associated with the uplink communications to thresholds for the one or more attributes;means for determining the identity and number of resource blocks employed by UE of the plurality of UEs that transmitted the uplink communications at the non-optimal power level;means for generating power control messages for the plurality of UEs, wherein positions of power control commands within the power control messages are mapped respectively to the identified resource blocks employed by the plurality of UEs that transmitted the uplink communications at the non-optimal power level, and wherein a number of power control commands for controlling power of a respective UE is equal to the number of resource blocks determined to be employed by the respective UE for its uplink transmissions; andmeans for transmitting the power control messages to the plurality of UEs. 15. A method of receiving power control commands, the method comprising: transmitting one or more uplink communications using a first number of resource blocks;receiving at least one power control message on a downlink when the one or more uplink communications is determined to be transmitted at a non-optimal power level by a comparison of one or more attributes associated with the uplink communications to thresholds for the one or more attributes, wherein the at least one power control message includes a second number of power control messages equal to the first number of resource blocks based on a determination of the first number of resource blocks, and wherein at least one location of the second number of power control commands within the at least one power control message is mapped to the first number of resource blocks utilized for transmitting the one or more uplink communications at the non-optimal power level; andadjusting power levels of the one or more uplink communications in accordance with the at least one power control command. 16. The method of claim 15, wherein the transmitting the one or more uplink communications comprises transmitting a plurality of uplink communications concurrently at different frequencies on a plurality of resource blocks at a non-optimal power level. 17. The method of claim 16, wherein the received power control message comprises a plurality of power control commands, wherein a location of the power control commands within the received message is mapped to the plurality of resource blocks used for the non-optimal uplink communications. 18. The method of claim 15, wherein the resource blocks utilized for the uplink communications are indexed. 19. The method of claim 18, further comprising associating with a group of UEs based at least upon radio conditions. 20. The method of claim 19, wherein the receiving the power control message comprises receiving a group power control message that includes power control commands in the group in addition to indexing information associated with the resource blocks utilized by the UEs for the uplink communications. 21. An apparatus for adjusting transmission power levels within a communication system, the apparatus comprising: at least one processor configured to: transmit one or more uplink communications at a non-optimal power level using a first number of resource blocks,receive at least one power control message when the one or more uplink communications is determined to be transmitted at the non-optimal power level by a comparison of one or more attributes associated with the uplink communications to thresholds for the one or more attributes, wherein the at least one power control message includes a second number of power control messages equal to the first number of resource blocks based on a determination of the first number of resource blocks, and wherein at least one location of the second number of power control commands within the at least one power control message is mapped to the first number of resource blocks utilized for transmitting the one or more non-optimal uplink communications at the non-optimal power level, andadjust power levels of the one or more uplink communications in accordance with the at least one power control command; anda memory coupled to the at least one processor. 22. A computer program product comprising: a non-transitory computer-readable medium comprising:code for causing at least one computer to transmit one or more uplink communications using a first number of resource blocks;code for causing the at least one computer to receive at least one power control message on a downlink when the one or more uplink communications is determined to be transmitted at a non-optimal power level by a comparison of one or more attributes associated with the uplink communications to thresholds for the one or more attributes, wherein the at least one power control message includes a second number of power control messages equal to the first number of resource blocks based on a determination of the first number of resource blocks, and wherein at least one location of the second number of power control commands within the at least one power control message is mapped to the first number of resource blocks utilized for transmitting the one or more uplink communications at the non-optimal power level; andcode for causing the at least one computer to adjust power levels of the one or more uplink communications in accordance with the at least one power control command. 23. An apparatus for adjusting power within a wireless communication system, the apparatus comprising: means for transmitting one or more uplink communications using a first number of resource blocks;means for receiving at least one power control message on a downlink when the one or more uplink communications is determined to be transmitted at a non-optimal power level by a comparison of one or more attributes associated with the uplink communications to thresholds for the one or more attributes, wherein the at least one power control message includes a second number of power control messages equal to the first number of resource blocks based on a determination of the first number of resource blocks, and wherein at least one location of the second number of power control commands within the at least one power control message is mapped to the first number of resource blocks utilized for transmitting the one or more uplink communications at the non-optimal power level; andmeans for adjusting power levels of the one or more uplink communications in accordance with the at least one power control command.
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이 특허에 인용된 특허 (4)
Tiedemann ; Jr. Edward G., Methods and apparatuses for fast power control of signals transmitted on a multiple access channel.
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