Transmission method of uplink listening reference signal

Abstract

The present application discloses a method for transmitting an uplink sounding reference signal, including: when a base station needs to configure an uplink sounding reference signal SRS resource for a user equipment UE, configure the SRS frequency hopping bandwidth of the UE as the full SRS bandwidth, so that The SRS period LSRS of the UE and the CQI period LCQI on the UE's uplink control channel satisfy: LCQI=n*LSRS, and the subframe offset of the SRS period and the CQI period are the same, wherein the n is A preset positive integer greater than 1; when the base station needs to schedule the UE, configure the UE's uplink traffic channel on a subframe different from the uplink control channel; the UE according to the configuration, According to the SRS cycle, send an SRS signal to the base station; when it is necessary to send the CQI information on the uplink control channel and the SRS signal in the same subframe according to the CQI cycle and the SRS cycle, only send CQI information on the uplink control channel. The invention can access more users and is easy to implement.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a method for transmitting an uplink listening reference signal (SRS). Background technique [0002] In order to improve uplink Frequency Selective Scheduling (FSS) performance, the LTE system sets an uplink Sensing Reference Signal (SRS) to measure the channel quality of a Physical Uplink Shared Channel (PUSCH) of a User Equipment (UE). SRS resources are distributed in a tree structure, each UE occupies a subband to send SRS signals, and the subband width is allocated by the eNB. Considering the number of users carried by SRS resources, eNB can allocate SRS sub-bands with smaller bandwidth occupied by each UE to ensure that more users are allowed to transmit SRS on the same frequency resources. However, if the UE's SRS transmission subband bandwidth is small, the obtained channel state information is limited, which will inevitably affect the FSS performance. For this reason, S...

AI Technical Summary

Problems solved by technology

[0008] It can be seen from the above that the performance of SRS measurement in the existing SRS frequency hopping mechanism is affected by the system parameters

For example, in order to access more users, SRS subband B needs to be set SRS = 2, frequency hopping bandwidth b hop =0, at this time, due to the frequency hopping bandwidth b hop = 0, then SRS needs to traverse all the bandwidths, and in practical applications, under the less severe channel of frequency selection, traversing all the bandwidths can not effectively improve the gain, which will increase the system complexity; if in order to avoid the full bandwidth of SRS The traversal of the frequency hopping bandwidth b hop = 1, then the measured bandwidth is limited to 1 / 3 of the full bandwidth of the SRS, and the bandwidth is very limited. At this time, the ability to resist frequency selection will appear insufficient

It can be seen that the SRS configuration specified in the existing LTE system cannot avoid many problems caused by traversing the full bandwidth while ensuring the frequency selection performance

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