Physical downlink control channel symbol number adaptive method and base station

Abstract

The invention provides a physical downlink control channel (PDCCH) symbolic number self-adaptive method and a base station. The method comprises: counting the quantity of aperiodical resource element groups (REGs) used by a PDCCH in a preset period; calculating the quantity of periodical REGs used by the PDCCH at a current transmission time interval (TTI); and according to the sum of the quantity of aperiodical REGs and the quantity of the periodical REGs, calculating the symbolic number of the PDCCH of the current TTI. By using the PDCCH symbolic number self-adaptive method and the base station, the symbolic number self-adaptive accuracy of the PDCCH can be improved.

Description

technical field [0001] The present invention relates to communication technologies, and in particular to a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) symbol number adaptive method and a base station (evolved Node B, eNB for short). Background technique [0002] The number of PDCCH symbols not only affects the number of symbols used for data transmission on the Physical Downlink Shared Channel (PDSCH), but also directly determines the number of users that can be authorized in the current subframe. Therefore, during the communication process, the eNB The number of PDCCH symbols is estimated according to the usage of Control Channel Element (CCE) in the latest period, so as to realize the adaptive adjustment of the number of PDCCH symbols. [0003] At present, the PDCCH symbol number adaptive method is: classify the subframes in a radio frame, and count the CCE usage of each type of subframe in a preset period. For a certain type of s...

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Problems solved by technology

[0004] In the public network, it is reasonable to use the above-mentioned existing method of setting the number of PDCCH symbols; but in the private network, group paging periodically uses public space CCEs, which consumes high power, and the number of PDCCH symbols often just shrinks. , and because of the lack of CCE due to the arrival of group paging, this scheduling fails, and this scheduling failure leads to the expansion of the number of PDCCH symbols, and after this scheduling, it needs to wait for another preset period to shrink PDCCH symbols, resulting in a reduction in the number of symbols that PDSCH can use before PDCCH symbols shrink

Therefore, using the existing adaptive method for the number of PDCCH symbols, the shrinkage or expansion of the number of PDCCH symbols is not timely, and the accuracy of the number of PDCCH symbols set is poor.

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