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Non-orthogonal random access method

A random access and random access response technology, applied in the field of communication, can solve the problem that the power multiplexing technology is not fully utilized, and achieve the effect of improving performance indicators and mitigating collisions

Active Publication Date: 2016-11-09
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Power multiplexing technology has not been fully utilized in several other traditional multiple access schemes. It is different from simple power control, but the base station follows related algorithms to perform power allocation.

Method used

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Embodiment Construction

[0046] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0047] figure 1 shows the random access steps of the non-orthogonal random access method, figure 2 The information transfer process of the non-orthogonal random access method is shown. The method includes the following steps:

[0048] 1. The user obtains the necessary configuration information for completing the random access process from the PBCH system information broadcast by the eNodeB, including uplink and downlink subframe allocation information, PRACH configuration information (PRACH configuration sequence number...

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Abstract

The present invention discloses a non-orthogonal random access method. The method includes a first step of acquiring, by each of N users, necessary configuration information; a second step of sending a random access preamble; a third step of detecting, based on arrival time of the user, the preamble; a fourth step of transmitting a random access response; a fifth step of transmitting a layer III message; a sixth step of determining, according to a relationship between regular time and ahead of time of the user, a user demodulation sequence by eNodeB, so as to separate multiple users in a serial interference cancellation (SIC) manner; and a seventh step of replying, by the eNodeB, each identified cell radio network temporary identifier (C-RNTI) competition resolving information, so as to indicate that the user randomly accesses successfully. According to the non-orthogonal random access method, multiple users access randomly simultaneously due to adoption of a power domain multiplexing manner, user access success probability is effectively improved, access time delay is lowered, network users are greatly increased, and demands of a fifth-generation mobile communication system are met.

Description

technical field [0001] The invention relates to the technical field of communication. More specifically, it relates to a non-orthogonal random access method. Background technique [0002] The random access process refers to the process from when the user sends a random access preamble to try to access the network to when a basic signaling connection is established with the network. Random access is a very critical step in the mobile communication system, and it is also the first step in establishing a communication link between the terminal and the base station: UE performs necessary signaling interaction with the base station through the random access process to complete subsequent operations: such as call, resource Request, data transmission, etc.; UE achieves uplink time synchronization with the system through random access. It can be said that the performance of random access directly affects user experience. [0003] The future fifth-generation mobile communication n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/004H04W74/085H04W74/0858H04W74/0866Y02D30/70
Inventor 章嘉懿梁亚楠李旭
Owner BEIJING JIAOTONG UNIV
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