User terminal and its random access method

A technology for random access and user terminal, applied in the field of communication, can solve the problem of high signaling overhead, reduce complexity and achieve the effect of adaptive modulation

Active Publication Date: 2018-10-16
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the signaling overhead in the above random access process is relatively large

Method used

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  • User terminal and its random access method
  • User terminal and its random access method
  • User terminal and its random access method

Examples

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Embodiment Construction

[0022] In the LTE system, since the signaling for sending the Preamble sequence cannot contain data information, when the UE performs random access, it usually sends the Preamble sequence to the base station first, and then sends an RRC connection request to the base station based on the response of the base station to perform random access. random access. Wherein, the RRC connection request generally includes data information required for establishing random access. That is to say, in the above random access process, the UE needs to send the Preamble sequence and the data information required for random access to the base station through separate signaling.

[0023] In the fifth-generation mobile communication network (5G), it is being studied that the signaling for sending the Preamble sequence can carry the user terminal ID, and the base station responds to the user terminal ID, thereby simplifying the signaling interaction of the random access process.

[0024] However, i...

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PUM

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Abstract

The invention discloses a user terminal and a random access method thereof. The method comprises the following steps: acquiring a piece of information of a time-frequency resource block for random access from the preset physical layer resource information, wherein the preset physical layer resource information comprises identification information of more than two time-frequency resource blocks for random access and a data transmission parameter on each time-frequency resource block, and more than two time-frequency resource blocks for random access are non-overlapped on the time domain or the frequency domain; sending a corresponding lead symbol sequence and the data information for random access to a base station by use of acquired information of the time-frequency resource block for the random access, wherein the base station performs the random access detection according to the preset physical layer resource information. By use of above mentioned scheme, the signaling expenditure in the random access process can be saved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a user terminal and a random access method thereof. Background technique [0002] In the Long Term Evolution (LTE) system, the base station will allocate random access channel (Random Access Channel, RACH) physical layer resources for the user terminal (UE), and the UE will use the RACH physical layer resources allocated by the base station to use The preamble sequence used in contention for access is sent to the base station, and the base station sends a corresponding response message to the UE based on the preamble sequence. Next, the UE sends an RRC connection request to the base station, and the base station establishes an RRC connection according to the RRC connection request. [0003] However, the signaling overhead in the above random access process is relatively large. Contents of the invention [0004] The problem to be solved by the present invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/004H04W74/0833H04W74/0866
Inventor 黄甦王化磊
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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