Method for updating random access response parameters and random access response method

Abstract

The invention discloses a method for updating random access response parameters and a random access response method. The method for updating the random access response parameters comprises the following steps that: before a terminal sends a random access precursor message to a base station, a retroversion control parameter is set as an initial value; after the terminal sends the random access precursor message to the base station and receives a random access response message returned by the base station, the terminal judges whether the random access response message contains the retroversion control parameter or not; if so, the terminal updates the value of the retroversion control parameter into the value of the retroversion control parameter contained in the random access response message; and otherwise, the terminal keeps the original value of the retroversion control parameter. The method is adopted to ensure that the terminal obtains the accurate retroversion control parameter in the random access process, only needs to update the retroversion control parameter once, simplifies the terminal operation and saves the time of the random access process of the terminal.

Description

technical field [0001] The invention relates to a wireless communication system, in particular to a random access response parameter update method and a random access response method. Background technique [0002] Such as figure 1 As shown, the cellular wireless communication system is mainly composed of a terminal, a base station and a core network (CoreNetwork, CN). A network composed of base stations is called a radio access network (Radio Access Network, RAN), which is responsible for access layer affairs, such as management of radio resources. There may be physical or logical connections between base stations according to the actual situation, such as figure 1 The connection between base station 1 and base station 2 or base station 3 in . Each base station can be connected to one or more core network nodes. The core network is responsible for non-access stratum affairs, such as location updates. Terminals refer to various devices that can communicate with cellular ...

AI Technical Summary

Problems solved by technology

If the base station sends a total of two random access response messages, the first random access response message is the response corresponding to terminal 1, the second random access response message is the response corresponding to terminal 2, and the rollback control parameter If it is set in the first response message, then terminal 1 will get the fallback control parameter and the corresponding response parameter in the same first response message, so everything is normal; but for terminal 2, the first response is received After the message, only the fallback control parameter is updated, and the corresponding response parameter is obtained when receiving the second response message, but because the second response message does not have a fallback control parameter, Terminal 2 updates the fallback control parameter to 0 , resulting in the error

If the base station includes the fallback control parameters in the second response message, then terminal 1 needs to wait for the second response message in order to obtain the correct fallback control parameters, which introduces additional delay

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