Method and device for multi-access-point calibration
A technology of multiple access points and calibration method, applied in the field of communication, can solve the problems of reduction, access point coherent transmission system performance, poor data parameters, etc., to achieve the effect of ensuring system performance
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Embodiment 1
[0047] This preferred embodiment 1 describes the situation that each RRU / access point does not perform antenna self-calibration.
[0048] (1) The serving cell configures the antenna port of each RRU / access point measured by the UE and the granularity of phase feedback, and sends a downlink reference signal on the corresponding antenna port.
[0049] The serving cell configures the UE to measure all antenna ports of each RRU / access point.
[0050] The frequency domain granularity of the phase feedback configured above may be RE (Resource Element), or RB (Resource Block), or subband (SubBand), or the entire cell system bandwidth, or other frequency domain units.
[0051] The above-mentioned downlink reference signal may be CSI-RS (Channel Status Information Reference Signal), and each RRU / access point is multiplexed and sent by frequency division, code division, or time division, or a mixture of the first three methods.
[0052] (2) According to the configuration of the serving...
Embodiment 2
[0062] The second preferred embodiment describes the situation that each RRU / access point performs antenna self-calibration. is a non-codebook based embodiment.
[0063] (1) Each RRU / access point performs antenna self-calibration.
[0064] The above self-calibration method may adopt an existing method based on a calibration network or a method based on a non-calibration network.
[0065] (2) The serving cell triggers a certain CoMP UE to perform assisted calibration, and configures the timing and times of UE measurement, as well as the granularity of antenna ports and phase feedback of each RRU / access point to be measured.
[0066] The above triggering manner may be that the serving cell triggers once, and then the UE measures and feeds back at a subsequent configured measurement moment.
[0067] It may also be that the serving cell triggers once, and then the UE measures and feeds back at the next N configured measurement moments.
[0068] Preferably, the serving cell conf...
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