Abstract
To suppress concentration of channel quality information requests and reports in a case of discontinuously transmitting reference signals at specific resources in a time domain, and thereby preventing degradation in throughput. A transmission apparatus transmits an instruction of CSI request distributed for each reception apparatus in a subframe concurrently with or earlier than a reference signal CSI-RS to each of reception apparatuses. Each of the reception apparatuses detects the CSI request from the transmission apparatus and calculates CSI from a channel estimation value of CSI-RS received thereafter. Then, the reception apparatus identifies CSI report subframe of the own apparatus from CSI report interval information of a given time interval notified in advance, the subframe in which the CSI request is detected and transmission timing of CSI-RS, and transmits a feedback signal including CSI report value by using PUSCH at the timing of the CSI report subframe.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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4G | 06/08/2013 | ISLD-201309-038 | PANASONIC CORP |
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Specification Information
Specification Information
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Technologies
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Claim
1. A communication apparatus comprising:
circuitry, which, in operation, detects a request signal for requesting a transmission of a signal; and a transmitter, which, in operation, transmits the signal, upon detection of the request signal, in a subframe, which is configured to be specific for the communication apparatus among a plurality of communication apparatuses, which is one among a plurality of subframes configured to be common to the plurality of communication apparatuses, and which is after a defined number of subframes or more from the detection of the request signal.
2. The communication apparatus according to claim 1, wherein said transmitter, in operation, transmits the signal at a time that is specific for the communication apparatus among the plurality of communication apparatuses.
3. The communication apparatus according to claim 1, wherein the defined number of subframes is configured to be common for the plurality of communication apparatuses.
4. The communication apparatus according to claim 1, wherein said circuitry, in operation, detects the request signal, which is transmitted at a time that is specific for the communication apparatus among the plurality of communication apparatuses.
5. The communication apparatus according to claim 1, wherein said circuitry, in operation, detects the request signal, which is transmitted on a control channel.
6. The communication apparatus according to claim 1, comprising a receiver, which, in operation, receives first information indicating the plurality subframes configured to be common to the plurality of communication apparatuses and second information indicating the subframe configured to be specific for the communication apparatus.
7. The communication apparatus according to claim 1, wherein the plurality of subframes configured to be common to the plurality of communication apparatuses and the subframe configured to be specific for the communication apparatus are configured using a period represented by a number of subframes.
8. The communication apparatus according to claim 1, wherein the plurality of subframes configured to be common to the plurality of communication apparatuses are subframes configured to be specific for a cell.
9. The communication apparatus according to claim 1, wherein the signal is a sounding reference signal.
10. The communication apparatus according to claim 1, wherein the signal is a signal indicating channel quality.
11. The communication apparatus according to claim 10, comprising a receiver, which, in operation, receives a reference signal with a period, which is represented by a number of subframes, wherein said transmitter, in operation, transmits the signal indicating channel quality, which is computed based on the reference signal.
12. The communication apparatus according to claim 11, wherein the reference signal is used for a communication system compatible with 8 antennas.
13. The communication apparatus according to claim 11, wherein the reference signal is a CSI reference signal.
14. A communication method comprising:
detecting a request signal for requesting a transmission of a signal; and transmitting the signal, upon detection of the request signal, in a subframe, which is configured to be specific for the communication apparatus among a plurality of communication apparatuses, which is one among a plurality of subframes configured to be common to the plurality of communication apparatuses, and which is after a defined number of subframes or more from the detection of the request signal.
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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.