Random access method and equipment

Abstract

The invention discloses a random access method and random access equipment. The random access method comprises the following steps that: uplink random access channels of uplink member carrier waves are grouped; one-to-one correspondence between downlink member carrier waves and uplink random access channel groups is established; a base station sends broadcast information to a terminal on each downlink member carrier wave, and according to the correspondence, loads a time-frequency resource collocation instruction of the uplink random access channel groups corresponding to the downlink member carrier waves on the broadcast information; the base station receives a random access leading sequence sent by the terminal from the uplink random access channel groups, and according to the correspondence, determines a downlink member carrier wave corresponding to the uplink random access channel groups sending the random access leading sequence; and the base station sends a random access response to the terminal on the determined downlink member carrier wave. The scheme of the invention saves downlink resources.

Description

technical field [0001] The present invention relates to random access technology, in particular to a random access method and equipment, the equipment includes a base station and terminal equipment. Background technique [0002] In a long term evolution-advanced (LTE-A, Long term Evolution-advanced) system, there is carrier aggregation. The so-called carrier aggregation means that a large bandwidth may include multiple continuous or discontinuous component carriers. For example, for a downlink system bandwidth of 100 MHz, it may include five discrete frequency bands of 20 MHz; it may also include discontinuous bandwidths of various frequency bands, such as multiple 10 MHz frequency bands, multiple 5 MHz frequency bands, and so on. [0003] In the case of carrier aggregation, the downlink system bandwidth on the base station side is not consistent with the uplink system bandwidth on the UE side. Generally, the downlink system bandwidth is greater than the uplink system bandwi...

AI Technical Summary

Problems solved by technology

[0014] It can be seen from the above that for the situation that the uplink component carrier and the downlink component carrier do not have a one-to-one correspondence, in the existing random access scheme, after receiving the random preamble, the base station needs to send a random access response to the UE on all downlink component carriers , which occupies too many downlink resources, resulting in a waste of downlink resources

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