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.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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4G | 11/04/2012 | ISLD-201204-011 | APPLE INC | No | Family Member |
Specification Information
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Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Claim
1. A method of reporting feedback information regarding a wireless channel comprising:
determining, by a mobile station, whether a predefined condition is satisfied, wherein determining whether the predetermined condition is satisfied comprises determining 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 predefined condition is satisfied, including, in a first report to be sent to the base station, feedback information regarding an individual one of plural subbands of the wireless channel; and
in response to determining that the predefined condition remains satisfied, including, 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.
2. The method of claim 1, further comprising
in response to determining that the predefined condition is not satisfied, including, in a third report to be sent to the base station, aggregate feedback information regarding the plural subbands.
3. The method of claim 2, wherein the aggregate feedback information includes an average of the plurality of subbands.
4. The method of claim 1, wherein determining whether the predefined condition is satisfied comprises determining whether the mobile station is slow moving.
5. The method of claim 1, further comprising:
including in the first report further feedback information regarding a second individual one of the plural subbands.
6. The method of claim 1, wherein the feedback information is for a closed loop MIMO (multiple input, multiple output) mode of operation.
7. The method of claim 6, wherein the feedback information included in the first report is for a first of plural codewords, and wherein the first report further includes feedback information for an individual subband for another one of the plural codewords.
8. The method of claim 1, wherein the feedback information in the first report for the individual subband comprises at least one of:
a precoding matrix index (PMI); and
channel quality indicator (CQI).
9. A base station comprising:
an interface to communicate wirelessly over a wireless channel with a mobile station; and
a processor configured to:
determine whether a predefined condition is satisfied, wherein to determine whether the predefined condition is satisfied the processor is further configured to determine whether a parameter of aggregate feedback information regarding plural subbands included in a prior report received from the mobile station has not changed;
in response to determining that the predefined condition is satisfied, use individual feedback information for an individual subband of plural subbands of the wireless channel; and
in response to determining that the predefined condition remains satisfied, use individual feedback information regarding a second individual one of plural subbands of the wireless channel.
10. The base station of claim 9, wherein the processor is further configured to:
in response to determining that the predefined condition is not satisfied, including, use aggregate feedback information regarding the plural subbands.
11. The base station of claim 9, wherein to determine whether the predefined condition is satisfied the processor is further configured to:
determine whether the mobile station is slow moving.
12. The base station of claim 9, wherein the individual feedback information or aggregate feedback information is used for downlink signaling and traffic data to be sent to the mobile station.
13. The base station 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).
14. A mobile station comprising:
an interface to communicate wirelessly over a wireless channel with a base station; and
a processor configured to:
determine whether a predefined condition is satisfied, wherein to determine whether the predefined condition is satisfied the processor is further configured to determine whether a parameter of aggregate feedback information regarding plural subbands included in a prior report sent to the base station has not changed;
in response to determining that the predefined condition is satisfied, 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 predefined condition remains satisfied, 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.
15. The mobile station of claim 14, wherein the processor is further configured to:
in response to determining that the predefined condition is not satisfied, include, in a third report to be sent to the base station, aggregate feedback information regarding the plural subbands.
16. The mobile station of claim 14, wherein to determine whether the predefined condition is satisfied the processor is further configured to:
determine whether the mobile station is slow moving.
17. The mobile station of claim 14, wherein the first report includes a bitmap identifying the plural subbands as being preferred subbands.
18. The base station of claim 9, wherein the parameter of aggregate feedback information regarding plural subbands included in a prior report is a data structure identifying preferred subbands.
19. The method of claim 1, wherein the parameter of aggregate feedback information regarding plural subbands included in a prior report is a data structure identifying preferred subbands.
20. The mobile station of claim 14, 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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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
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.