Method for reducing HARQ retransmission time interval in multi-carrier system and base station

Abstract

The invention provides a method for reducing an hybrid automatic repeat request (HARQ) retransmission time interval in a multi-carrier system, which comprises the following steps that: a base station carries out aggregation on a plurality of carriers, wherein the allocation of at least one carrier is different from that of other carriers so as to increase the distribution of uplink resources on atime domain in a system; and the base station sends data on the aggregated carriers. By increasing the number of the subframes of the uplink resources in the system, the method reduces the HARQ maximum processes and round-trip time (RTT) in the system while guaranteeing to meet the requirements of the ratio of total uplink subframes and total downlink subframes of the system. The method sufficiently utilizes the multi-carrier property of the system and reduces the HARQ retransmission delay in the system so as to improve the transmission efficiency of the system.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and a base station for reducing HARQ (Hybrid Automatic Repeat Request, Hybrid Automatic Repeat Request) RTT (Round-trip Time, retransmission time interval) in a multi-carrier system. Background technique [0002] In the long-term evolution multi-carrier mobile communication system, such as the LTE-Advanced (long-term evolution multi-carrier) system, it is necessary to provide a higher peak rate through a larger transmission bandwidth to meet the needs of users, but the expansion of the transmission bandwidth is subject to operational constraints. Frequency resources owned by the provider. For the Long Term Evolution multi-carrier system, in order to support a wider system bandwidth than the LTE system, such as 100MHz, one possibility is to directly allocate 100M bandwidth spectrum. However, due to the limited frequency resources owned by operators, in orde...

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Problems solved by technology

[0016] The disadvantage of the existing technology is that, for the long-term evolution multi-carrier system, when multi-carrier aggregation is used, the data on each downlink carrier will be independently encoded and decoded. At this time, the maximum number of HARQ processes in the system will increase with the number of aggregated carriers. It grows exponentially, and the more processes in the system, the larger the RTT, so the larger the capacity of the terminal memory is required, which increases the manufacturing cost of the terminal equipment

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