Random access method, equipment and system

A technology for random access and access network equipment, which is applied in the field of communication and can solve the problems such as the inability to meet the requirements of 5G mobile communication services, the inability to guarantee the waiting time of URLLC services, and the requirements for low latency.

Active Publication Date: 2018-11-13
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

However, in the existing random access process, the terminal device randomly determines the waiting time according to the backoff instruction sent by the access network device. This method cannot guarantee that the waiting ti

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  • Random access method, equipment and system
  • Random access method, equipment and system
  • Random access method, equipment and system

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[0059] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0060] The technical solution of the embodiment of the present invention is based on figure 1 The communication system 100 is shown. The communication system 100 can support services with low latency requirements, such as URLLC services. It can be understood that the communication system 100 also supports services with conventional delay requirements. The communication system 100 includes an access network device and at least one terminal device. Such as figure 1 As shown, the communication system 100 includes, for example, an access network device 10 and terminal devices 20 and 30. The terminal devices 20 and 30 can be synchronized with the access network device 10 through a random access process. Thereafter, control information and data can be transmitted between the terminal devices 20, 30 and the access network device 10.

[006...

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Abstract

The embodiment of the invention discloses a random access method, equipment and a system. The random access method comprises the steps that: terminal equipment sends a first preamble to access networkequipment; the terminal equipment receives a random access response message sent by the access network equipment, wherein the random access response message comprises backoff indication and parameterinformation; the backoff indication indicates a time value; the parameter information is used for determining the waiting time by the terminal equipment; the terminal determines the waiting time according to the backoff indication or the backoff indication and the parameter information; and the terminal equipment sends a second preamble to the access network equipment after delaying the first time. Thereby, the terminal equipment can initiate random access according to random access priority requirements; and thus, low-delay requirements are satisfied.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a random access method, device and system. Background technique [0002] In the fourth generation (4th Generation, 4G) mobile communication, the terminal device and the access network device need to perform data transmission while maintaining synchronization, thereby ensuring the accuracy of data transmission. A random access (Random Access, RA) process is an important way for a terminal device to maintain synchronization with an access network device. Taking a Long Term Evolution (LTE) system as an example, there are two different random access methods: non-contention based random access and contention based random access. [0003] In the initial stage of the random access process, the terminal device will send a preamble (preamble) to the access network device. One function of the preamble sent by the terminal device is to enable the access network device to es...

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Application Information

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IPC IPC(8): H04W72/04H04W74/08
CPCH04W72/046H04W74/0833H04W74/0875
Inventor 于海凤熊新蔺波于峰
Owner HUAWEI TECH CO LTD
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