Dynamic channel quality measurement procedure implemented in a wireless digital communication system to prioritize the forwarding of downlink data
View Patent ↗A wireless digital communication system includes a base station in communication with a plurality of user equipment mobile terminals (UEs). The system prioritizes the forwarding of blocks of downlink data to designated ones of the UEs. The system employs adaptive modulation and coding (AM&C) to achieve improved radio resource utilization and provides optimum data rates for user services. Blocks of downlink (DL) data are received by the base station which requests downlink (DL) channel quality measurements only from those mobile terminals (UEs) with pending downlink transmissions. The UEs respond to the request by measuring and reporting DL channel quality to the base station, which then allocates resources such that the UEs will make best use of radio resources. The base station notifies the UEs of the physical channel allocation indicating the modulation/coding rate and allocated slots followed by transmission of blocks of downlink data which are transmitted to the UEs.
1. A user equipment (UE), comprising:
a receiver operable using radio resources to receive a non-periodic request from a base station to provide channel quality information (CQI) regarding specific radio resources as a subset of the radio resources, wherein the request is to be transmitted to the UE;
a transmitter to transmit channel quality information with respect to the specific radio resources that are the subset of the radio resources in response to the non-periodic request;
wherein the receiver is operable to receive a coding rate and an allocation of the radio resources from the base station, wherein the coding rate is based on the channel quality information, and wherein the allocation of radio resources is based on a prioritization of UEs based on the channel quality information received from the UEs; and
wherein the receiver is operable to receive downlink data via the subset of radio resources based on the coding rate and the allocation of the radio resources received from the base station, wherein UEs with a higher channel quality receive the downlink data before UEs with lower channel quality.
2. The user equipment of claim 1 , wherein the receiver is operable to receive a request to provide one of a number of types of channel quality information.
3. The user equipment of claim 2 , wherein a first type of channel quality information comprises the channel quality information regarding the subset of the radio resources.
4. The user equipment of claim 2 , wherein a second type of channel quality information comprises channel quality information regarding the entire radio resources.
5. The user equipment of claim 1 :
wherein the receiver is operable to receive a non-periodic request to provide a channel quality information in respect of the subset of radio resources; and
the transmitter is operable to transmit channel quality information with respect to the specific radio resources that are the subset of the radio resources response to the non-periodic request based on the UE having pending downlink transmissions.
6. A user equipment (UE), comprising:
a receiver operable using radio resources to receive a first type of non-periodic request from a base station to provide channel quality data regarding specific radio resources as a subset of the radio resources, the first type of non-periodic request being one of a plurality of types of requests for channel quality data, wherein the first type of non-periodic request is to be transmitted to the UE;
a transmitter to transmit channel quality data with respect to the specific radio resources that are the subset of the radio resources in response to the first type of non-periodic request;
wherein the receiver is operable to receive a coding rate and an allocation of the radio resources from the base station, wherein the coding rate is based on the channel quality data, and wherein the allocation of radio resources is based on a prioritization of UEs based on the channel quality data received from the UEs; and
wherein the receiver is operable to receive downlink data via the subset of radio resources based on the coding rate and the allocation of the radio resources received from the base station, wherein UEs with a higher channel quality receive the downlink data before UEs with lower channel quality.
7. The user equipment of claim 6 , wherein the receiver is operable to receive downlink transmission parameters associated with the downlink data.
8. The user equipment of claim 7 , wherein the downlink transmission parameters comprise one or more of modulation type, the coding rate, and timeslot(s).
9. The user equipment of claim 6 , wherein the first type of non-periodic request for the channel quality data comprises a request for channel quality data regarding a subband of the radio resources.
10. The user equipment of claim 9 , wherein a second type of non-periodic request for the channel quality data comprises a request for channel quality data regarding the entirety of the radio resources.
11. A base station for establishing a downlink channel with a user equipment (UE), the base station comprising:
a transmitter using radio resources to output a first type of non-periodic request from the base station for a downlink channel quality measurement report regarding specified radio resources as a subset of the radio resources, wherein the non-periodic request is to be transmitted to the UE;
a receiver to receive the requested downlink channel quality measurement report regarding the specified radio resources that are the subset of the radio resources and in response to the non-periodic request;
wherein the transmitter is operable to output a coding rate and an allocation of the radio resources to the UE, wherein the coding rate is based on the requested downlink channel quality measurement report regarding the specified radio resources, and wherein the allocation of radio resources is based on a prioritization of UEs based on the requested downlink channel quality measurement report regarding the specified radio resources as received at the base station from the UE; and
wherein the transmitter is operable to establish the downlink channel with the user equipment in response to the received downlink channel quality measurement report based on the coding rate and the allocation of the radio resources outputted from the base station, wherein UEs with a higher channel quality receive downlink data before UEs with lower channel quality.
12. The base station of claim 11 , wherein the first type of non-periodic request is associated with a subset of the specified radio resources.
13. The base station of claim 11 , wherein the first type of non-periodic request is associated with the entirety of the radio resources.
14. The base station of claim 11 , wherein the transmitter, responsive to the receiver receiving the downlink channel quality measurement report, is operable to output a downlink physical channel allocation of radio resources for transmission to the user equipment for use in receiving downlink data via the downlink channel.
15. The base station of claim 14 , wherein the downlink physical channel allocation of radio resources comprises at least one of a specified coding rate, modulation type, and allocated timeslot(s).
16. A user equipment (UE), comprising:
a receiver operable using radio resources to receive a non-periodic request form a base station to provide a channel quality (CQ) measurement report regarding specified radio resources as a subset of the radio resources, wherein the request is to be transmitted to the UE;
a transmitter to transmit the CQ measurement report with respect to the specific radio resources that are the subset of the radio resources in response to the non-periodic request;
wherein the receiver is operable to receive a coding rate and an allocation of the radio resources from the base station, wherein the coding rate is based on the CQ measurement report, and wherein the allocation of radio resources is based on a prioritization of UEs based on the CQ measurement report received from the UEs; and
wherein the receiver is operable to receive downlink data via the subset of radio resources based on the coding rate and the allocation of the radio resources received from the base station, wherein UEs with a higher channel quality receive the downlink data before UEs with lower channel quality.
17. The user equipment of claim 16 , wherein the non-periodic request to provide the CQ measurement report comprises a scheduled request to provide the CQ measurement report regarding scheduled radio resources.
18. The user equipment of claim 17 , wherein the scheduled radio resources comprise specified radio resources.
19. The user equipment of claim 17 , wherein the scheduled radio resources comprise at least one specific time slot.
20. The user equipment of claim 16 :
wherein a first type of the non-periodic request from the base station for the CQ measurement report comprises a request for information regarding a subband of the radio resources; and
wherein a second type of the non-periodic request from the base station for the CQ measurement report comprises a request for information regarding the entirety of the radio resources.