US 10,462,822 B2
Random access method and apparatus
Wei Quan, Beijing (CN); Xiaodong Yang, Beijing (CN); Zhenxing Hu, Shenzhen (CN); and Jian Zhang, Beijing (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Jun. 29, 2016, as Appl. No. 15/197,289.
Application 15/197,289 is a continuation of application No. PCT/CN2014/083887, filed on Aug. 7, 2014.
Claims priority of application No. 2013 1 0753912 (CN), filed on Dec. 31, 2013.
Prior Publication US 2016/0309519 A1, Oct. 20, 2016
Int. Cl. H04W 74/08 (2009.01); H04W 74/00 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 74/006 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A random access method, carried out on a base station, comprising:
receiving a preamble sent by a user equipment (UE);
acquiring, according to a pre-obtained first downlink assignment information mapping relationship, a first downlink assignment information mapped to the preamble based on the mapping relationship, wherein the first downlink assignment information is downlink assignment information used by a random access response message; and
sending the random access response message to the UE according to the first downlink assignment information,
wherein, after the sending the random access response message to the UE, the method further comprises:
receiving, by using uplink resources indicated in a pre-obtained first uplink grant information, an uplink message sent by the UE, wherein the uplink message carries an identification information of the UE, and the pre-obtained first uplink grant information is uplink grant information used by the uplink message;
generating a contention resolution message according to the identification information of the UE that is carried in the uplink message; and
sending, by using downlink resources indicated in a pre-obtained second downlink assignment information, the contention resolution message to the UE, wherein the pre-obtained second downlink assignment information is downlink assignment information used by the contention resolution message.