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Random access method, device and equipment

A random access and random access request technology, applied in electrical components, wireless communication, etc., can solve the problem of excessive delay in random access

Active Publication Date: 2018-04-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a random access method, device and equipment, which can solve the problem of excessive random access delay

Method used

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  • Random access method, device and equipment

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0217] Embodiment 1: Simplified method for random access process

[0218] Currently, since the coverage radius of the cell becomes smaller, it is not necessary for the terminal to obtain a TA (time advanced timing advance) by sending a random access response, so further simplification of the steps becomes possible. For some terminals, such as Internet of Things terminals, after establishing a link with the network through random access, there is no large amount of data to be transmitted, and the very small amount of data information to be transmitted can also be combined into random access, which further The need to simplify the random access procedure is supported.

[0219] Therefore, in order to further reduce the access delay of random access in the new generation communication system, the following processing can be performed based on the method in LTE.

[0220] Since the process for the terminal to obtain TA through the random access response is not necessary, that is to...

Embodiment 2

[0226] Embodiment 2: Implementation Scheme 1 of Random Access Control Information and Data Information Retransmission Method

[0227] This embodiment is applied when an error occurs in some transmissions in Embodiment 1. The content sent in step 1 in the first embodiment is preamble and control information or preamble, control information and data information. Generally speaking, when control information and data information are together, they can be uniformly packaged into data blocks for transmission. The preamble mainly examines the detection rate and false detection rate, while the control information or the data block packaged by control information and data information mainly examines the block error rate (BLER) or bit error rate (BER). Generally, the preamble For large coverage requirements, the sequence is often longer and the required SIR is relatively low, while the control information or data block generally has at least ten to dozens of bits, and the SIR required ...

Embodiment 3

[0258] Embodiment 3: Implementation Scheme 2 of Random Access Control Information and Data Information Retransmission Method

[0259] The problem to be solved in this embodiment and embodiment two is the same.

[0260] In the two-step random access process, the terminal first sends a random access request to the base station or transmission node (TRP). The random access request contains at least preamble and control information. In some scenarios, some data may also be added. The control information contains At least the UE ID for conflict resolution needs to be included. The base station or transmission node (TRP) tries to receive a random access request. When the base station or transmission node (TRP) detects a successful Preamble but fails to demodulate successful control information or data, the base station or transmission node (TRP) sends a random access request to the terminal. Response (RAR), the RAR contains at least a preamble ID, which is used to confirm the pream...

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Abstract

The invention discloses a random access method, device and equipment, and the method comprises the steps that a network node receives a random access request, wherein the random access request at least comprises a precursor and a first data block; the network node transmits an RAR (random access response) to a terminal; the network node receives a second data block transmitted by the terminal or receives the random access request again.

Description

technical field [0001] The present invention relates to wireless communication technology, especially to a random access method, device and equipment. Background technique [0002] The new generation of mobile communication systems will carry out system networking on carrier frequencies higher than those used by 2G, 3G, and 4G systems. Currently, the frequency bands that have been widely agreed in the industry and recognized by international organizations are mainly 3GHz~6GHz, 6GHz~100GHz, relatively Due to the networking frequency of the early communication system, these frequency bands are relatively high, and the loss in propagation is greater, and the coverage radius is relatively smaller under the same power, which also determines that in the new generation of mobile communication system networking, the small cell (Small cell) will be the main form of composition. In addition, many of these frequency bands belong to the unlicensed spectrum, which needs to comply with t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
CPCH04W74/0833H04W74/0841H04W72/0466H04W72/20
Inventor 张峻峰郝鹏苟伟帕特里克·斯韦德曼游爱民
Owner ZTE CORP
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