Abstract
To report feedback information regarding a wireless channel, a mobile station determines whether a predefined condition is satisfied. In response to determining that the predefined condition is satisfied, feedback information regarding an individual one of plural subbands of the wireless channel is included in a first report to be sent to a base station. In response to determining that the predefined condition is not satisfied, aggregate feedback information regarding the plural subbands is included in a second report to be sent to the base station.
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Claim
1. A base station comprising:
an interface to communicate wirelessly over a wireless channel with a mobile station; and
a processor to:
receive, in a first reporting interval, first feedback information from a mobile station, wherein the first feedback information comprises an indication of one or more preferred sub-bands of a wireless channel;
receive, in a second successive reporting interval, second feedback information from the mobile station, wherein the second feedback information comprises an indication of one or more preferred sub-bands of a wireless channel;
in response to determining that the indication in each of the first and second feedback information is the same:
send a control indication to the mobile station to cause the mobile station to send individual feedback information regarding at least one individual subband of a wireless channel in a physical uplink control channel (PUCCH), wherein each of the at least one individual subband is a preferred subband, wherein the control indication is part of a radio resource control (RRC) message; and
receive a plurality of messages from the mobile station containing the individual feedback information that is responsive to the control indication, wherein each of the plurality of messages comprise an indication of one or more preferred sub-bands of a wireless channel, wherein each successive one of the plurality of messages contains feedback information regarding a different individual subband than the previous message; and
in response to determining, from the plurality of messages, that the indication of one or more preferred sub-bands of a wireless channel has changed:
send a second control indication to the mobile station to cause the mobile station to send aggregate feedback information for a plurality of preferred subbands; and
receive at least one message from the mobile station containing the aggregate feedback information that is responsive to the second control indication.
2. The base station of claim 1,
wherein the individual feedback information comprises at least one of:
an individual channel quality indicator (CQI); and
an individual precoding matrix index (PMI).
3. The base station of claim 1,
wherein the individual feedback information or aggregate feedback information is used for downlink signaling and traffic data to be sent to the mobile station.
4. The base station of claim 1,
wherein the aggregate feedback information includes an average of the plurality of subbands.
5. The base station of claim 1,
wherein the plurality of messages comprises the individual feedback information for a first of plural codewords, and wherein the plurality of messages further comprise the individual feedback information for a second of the plural codewords.
6. The base station of claim 1,
wherein the first and second feedback information is for a closed loop MIMO (multiple input, multiple output) mode of operation.
7. The base station of claim 1,
wherein the one or more preferred subbands are identified in a bitmap included in the first feedback information.
8. The base station of claim 1,
wherein the one or more preferred subbands are identified in a data structure included in the first feedback information.
9. An apparatus, comprising:
a memory; and
a processor in communication with the memory, wherein the processor is configured to:
generate instructions to transmit, in a first reporting interval, first feedback information, wherein the first feedback information comprises an indication of one or more preferred sub-bands of a wireless channel;
generate instructions to transmit, in a second successive reporting interval, second feedback information, wherein the second feedback information comprises an indication of one or more preferred sub-bands of a wireless channel;
wherein, when the indication in each of the first and second feedback information is the same:
receive a control indication from a base station that requests individual feedback information regarding at least one individual subband of a wireless channel in a physical uplink control channel (PUCCH), wherein each of the at least one individual subband is a preferred subband, wherein the control indication is part of a radio resource control (RRC) message; and
generate instructions to transmit a plurality of messages to the base station containing the individual feedback information that is responsive to the control indication, wherein each of the plurality of messages comprise an indication of one or more preferred sub-bands of a wireless channel, wherein each successive one of the plurality of messages contains feedback information regarding a different individual subband than the previous message; and
wherein, when the indication of one or more preferred sub-bands of a wireless channel has changed:
receive a second control indication that requests aggregate feedback information for a plurality of preferred subbands; and
generate instructions to transmit at least one message containing the aggregate feedback information responsive to the second control indication.
10. The apparatus of claim 9,
wherein the individual feedback information comprises at least one of:
an individual channel quality indicator (CQI); and
an individual precoding matrix index (PMI).
11. The apparatus of claim 9,
wherein the aggregate feedback information includes an average of the plurality of subbands.
12. The apparatus of claim 9,
wherein the plurality of messages comprises the individual feedback information for a first of plural codewords, and wherein the plurality of messages further comprise the individual feedback information for a second of the plural codewords.
13. The apparatus of claim 9,
wherein the first and second feedback information is for a closed loop MIMO (multiple input, multiple output) mode of operation.
14. The apparatus of claim 9,
wherein the one or more preferred subbands are identified in a bitmap included in the first feedback information.
15. The apparatus of claim 9,
wherein the one or more preferred subbands are identified in a data structure included in the first feedback information.
16. An apparatus, comprising:
a memory; and
a processor in communication with the memory, wherein the processor is configured to:
determine whether a parameter of aggregate feedback information regarding plural subbands included in a prior report sent to a base station has not changed;
in response to determining that the parameter of aggregate feedback has not changed, include, in a first report to be sent to the base station, individual feedback information regarding an individual one of plural subbands of the wireless channel; and
in response to determining that the parameter of aggregate feedback remains unchanged, include, in a second report to be sent to the base station, feedback information regarding a second individual one of plural subbands of the wireless channel.
17. The apparatus of claim 16,
wherein the processor is further configured to:
in response to determining that the parameter of aggregate feedback has changed, include, in a third report to be sent to the base station, aggregate feedback information regarding the plural subbands.
18. The apparatus of claim 16,
wherein to determine whether the parameter of aggregate feedback has not changed the processor is further configured to:
determine whether a mobile station associated with the processor is slow moving.
19. The apparatus of claim 16,
wherein the first report includes a bitmap identifying the plural subbands as being preferred subbands.
20. The apparatus of claim 16,
wherein the parameter of aggregate feedback information regarding plural subbands included in a prior report is a data structure identifying preferred subbands.
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.