Dynamic channel quality measurement procedure implemented by user equipment for adaptive modulation and coding techniques
First Claim
1. In a wireless communication system including a plurality of user equipment mobile terminals (UEs) and a base station, wherein a first subset of the UEs have pending downlink transmissions and a second subset of the UEs do not have pending downlink transmissions, a method of minimizing overhead signaling and optimizing radio resource utilization by restricting the transmission of channel quality measurement requests to only those UEs that have pending downlink transmissions so as to avoid unnecessary channel quality measurements performed by the UEs and also avoid unnecessary channel quality measurement requests transmitted by the base station, the method comprising:
- (a) each of the UEs in the first subset receiving from the base station a request to begin channel quality measurements, whereby the base station does not transmit a request to begin channel quality measurements to the UEs in the second subset due to not having pending downlink transmissions;
(b) each of the UEs in the first subset performing channel quality measurements and transmitting to the base station the results of the channel quality measurements, whereby the UEs in the second subset do not perform channel quality measurements because they did not receive a request to begin channel quality measurements from the base station due to not having pending downlink transmissions; and
(c) the base station allocating radio resources used by the UEs in the first subset in response to the results of the channel quality measurements transmitted to the base station by the UEs in the first subset.
2 Assignments
0 Petitions
Accused Products
Abstract
A wireless digital communication method for a plurality of user equipment mobile terminals (UEs) to communicate with a base station. Adaptive modulation and coding (AM&C) is used to achieve improved radio resource utilization and provide 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.
-
Citations
45 Claims
-
1. In a wireless communication system including a plurality of user equipment mobile terminals (UEs) and a base station, wherein a first subset of the UEs have pending downlink transmissions and a second subset of the UEs do not have pending downlink transmissions, a method of minimizing overhead signaling and optimizing radio resource utilization by restricting the transmission of channel quality measurement requests to only those UEs that have pending downlink transmissions so as to avoid unnecessary channel quality measurements performed by the UEs and also avoid unnecessary channel quality measurement requests transmitted by the base station, the method comprising:
-
(a) each of the UEs in the first subset receiving from the base station a request to begin channel quality measurements, whereby the base station does not transmit a request to begin channel quality measurements to the UEs in the second subset due to not having pending downlink transmissions; (b) each of the UEs in the first subset performing channel quality measurements and transmitting to the base station the results of the channel quality measurements, whereby the UEs in the second subset do not perform channel quality measurements because they did not receive a request to begin channel quality measurements from the base station due to not having pending downlink transmissions; and (c) the base station allocating radio resources used by the UEs in the first subset in response to the results of the channel quality measurements transmitted to the base station by the UEs in the first subset. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. In a wireless communication system including a plurality of user equipment mobile terminals (UEs) and a base station, wherein a first subset of the UEs have pending downlink transmissions and a second subset of the UEs do not have pending downlink transmissions, a method of minimizing overhead signaling and optimizing radio resource utilization by restricting the transmission of channel quality measurement requests to only those UEs that have pending downlink transmissions so as to avoid unnecessary channel quality measurements performed by the UEs and also avoid unnecessary channel quality measurement requests transmitted by the base station, the method comprising:
-
(a) each of the UEs in the first subset receiving from the base station a request to begin channel quality measurements, whereby the base station does not transmit a request to begin channel quality measurements to the UEs in the second subset due to not having pending downlink transmissions; (b) each of the UEs in the first subset performing channel quality measurements and transmitting to the base station the results of the channel quality measurements, whereby the UEs in the second subset do not perform channel quality measurements because they did not receive a request to begin channel quality measurements from the base station due to not having pending downlink transmissions; (c) the base station determining which of the UEs in the first subset will make the best use of radio resources; and (d) the base station sending downlink data only to the UEs determined in step (c). - View Dependent Claims (9, 10, 11, 12, 13)
-
-
14. A wireless communication system for minimizing overhead signaling and optimizing radio resource utilization, the system comprising:
-
(a) a base station; and (b) a plurality of user equipment mobile terminals (UEs), wherein the base station sends a request to begin channel quality measurements only to a first subset of the UEs that have pending downlink transmissions and not to a second subset of the UEs that do not have pending downlink transmissions, the UEs in the first subset perform channel quality measurements and transmit to the base station the results of the channel quality measurements, and the base station allocates radio resources used by the UEs in the first subset in response to the results of the channel quality measurements transmitted to the base station by the UEs in the first subset. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
-
21. A wireless communication system for minimizing overhead signaling and optimizing radio resource utilization, the system comprising:
-
(a) a base station; and (b) a plurality of user equipment mobile terminals (UEs), wherein the base station sends a request to begin channel quality measurements only to a first subset of the UEs that have pending downlink transmissions and not to a second subset of the UEs that do not have pending downlink transmissions, the UEs in the first subset perform channel quality measurements and transmit to the base station the results of the channel quality measurements, and the base station sends downlink data to those UEs in the first subset that the base station determines will make the best use of radio resources. - View Dependent Claims (22, 23, 24, 25, 26)
-
-
27. In a wireless communication system including a plurality of user equipment mobile terminals (UEs) and a base station, wherein a subset of the UEs have pending downlink transmissions, a method of minimizing overhead signaling and optimizing radio resource utilization, the method comprising:
-
(a) each of the UEs in the subset receiving from the base station a request to begin channel quality measurements; (b) each of the UEs in the subset transmitting to the base station the results of the channel quality measurements; (c) the base station allocating radio resources used by the UEs in the subset in response to the results of the channel quality measurements; and (d) each of the UEs in the subset receiving a communication signal from the base station that indicates a particular coding rate, modulation type and at least one allocated time slot, wherein each of the UEs in the subset prepare for reception of downlink data from the base station by setting reception parameters in accordance with the particular coding rate, the modulation type and the at least one allocated time slot indicated by the communication signal. - View Dependent Claims (28, 29, 30, 31)
-
-
32. In a wireless communication system including a plurality of user equipment mobile terminals (UEs) and a base station, wherein a subset of the UEs have pending downlink transmissions, a method of minimizing overhead signaling and optimizing radio resource utilization, the method comprising:
-
(a) each of the UEs in the subset receiving from the base station a request to begin channel quality measurements; (b) each of the UEs in the subset transmitting to the base station the results of the channel quality measurements; (c) the base station determining which of the UEs in the subset will make the best use of radio resources; (d) the base station sending downlink data only to the UEs determined in step (c); and (e) each of the UEs determined in step (c) receiving a communication signal from the base station that indicates a particular coding rate, modulation type and at least one allocated time slot, wherein each of the UEs determined in step (c) prepare for reception of downlink data from the base station by setting reception parameters in accordance with the particular coding rate, the modulation type and the at least one allocated time slot indicated by the communication signal. - View Dependent Claims (33, 34, 35)
-
-
36. A wireless communication system for minimizing overhead signaling and optimizing radio resource utilization, the system comprising:
-
(a) a base station; and (b) a plurality of user equipment mobile terminals (UEs), wherein the base station sends a request to begin channel quality measurements only to a subset of the UEs that have pending downlink transmissions, the UEs in the subset transmit to the base station the results of the channel quality measurements, the base station allocates radio resources used by the UEs in the subset in response to the results of the channel quality measurements, and each of the UEs in the subset receives a communication signal from the base station that indicates a particular coding rate, modulation type and at least one allocated time slot, wherein each of the UEs in the subset prepares for reception of downlink data from the base station by setting reception parameters in accordance with the particular coding rate, the modulation type and the at least one allocated time slot indicated by the communication signal. - View Dependent Claims (37, 38, 39, 40)
-
-
41. A wireless communication system for minimizing overhead signaling and optimizing radio resource utilization, the system comprising:
-
(a) a base station; and (b) a plurality of user equipment mobile terminals (UEs), wherein the base station sends a request to begin channel quality measurements only to a subset of the UEs that have pending downlink transmissions, the UEs in the subset transmit to the base station the results of the channel quality measurements, the base station sends downlink data to those UEs in the subset that the base station determines will make the best use of radio resources, and each of the UEs that the base station determines will make the best use of radio resources receives a communication signal from the base station that indicates a particular coding rate, modulation type and at least one allocated time slot. - View Dependent Claims (42, 43, 44, 45)
-
Specification