Random access method and system

A random access and system message technology, applied in the field of communication, can solve the problems of reducing resource utilization, resource waste, etc., and achieve the effects of avoiding random access conflicts and inter-symbol interference, avoiding influence, and improving utilization.

Inactive Publication Date: 2011-12-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with this solution, since the dedicated PRACH channel is not needed in the case of small M2M or MBMS service traffic, otherwise it will lead to waste of resources. For example, in the existing LTE protocol, the minimum number of allocated resources for the PRACH channel is A PRACH Occasion is allocated every 20 wireless subframes, occupying 6 PRBs (Physical Resource Blocks). If the M2M service traffic is small, configuring a PRACH resource independently for the M2M service will waste resources and reduce resource utilization.

Method used

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Embodiment 1

[0022] figure 1 It is a schematic structural diagram of a random access system according to Embodiment 1 of the present invention, and the system includes: a wireless access network element (for example, a base station) 10 and a terminal 20 for performing services. Wherein, the access network element 10 is configured to use a system message or a paging message to indicate to the terminal 20 of the predetermined service the random access resource allocated for the predetermined service, wherein the random access resource includes a dedicated preamble code in the shared PRACH and / or a dedicated PRACH, and the configuration information of the dedicated PRACH and the configuration information of the shared PRACH are respectively indicated in different system messages or paging messages; the terminal 20 is configured to perform random access using the above random access resources .

[0023] For example, the aforementioned predetermined service may be an M2M service or an MBMS ser...

Embodiment 2

[0029] figure 2 It is a flowchart of a random access method according to Embodiment 2 of the present invention, the method mainly includes the following steps (step S202-step S204):

[0030] Step S202, the radio access network element indicates to the terminal of the scheduled service the random access resource allocated for the scheduled service by using a system message or a paging message, wherein the random access resource includes a dedicated preamble code and / or a dedicated preamble code in the shared PRACH Dedicated PRACH, and the configuration information of the dedicated PRACH and the configuration information of the shared PRACH are respectively indicated in different system messages or paging messages;

[0031] For example, the predetermined service in the embodiment of the present invention may be an M2M service or an MBMS uplink feedback service.

[0032] In practical applications, the wireless access network element can allocate random access resources for the ...

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PUM

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Abstract

The present invention discloses a random access method and system. Wherein, the random access method includes the following steps: a radio access network element uses system information or paging information to indicate the random access resources allocated for a predetermined service to a terminal of the predetermined service, wherein, the random access resources comprise a dedicated preamble in a shared Physical Random Access Channel (PRACH) and/or a dedicated PRACH, and the configuration information of the dedicated PRACH and that of the shared PRACH are indicated in different system information or paging information respectively; and the terminal of the predetermined service uses the random access resources to perform random access. With the present invention, the impact on other ordinary service terminals due to the service requirements of the predetermined service is avoided.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a random access method and system. Background technique [0002] Due to the huge number of M2M (Internet of Things) mobile terminals, there is a suddenness in initiating a connection with the network. For example, when a certain area recovers from a power failure, all M2M terminals in this area will initiate a request to connect to the network to register with the network, which will bring a large number of network connection requests; or in the monitoring M2M application, A large number of M2M terminal sensors trigger responses to the same event at the same time, and initiate wireless connection requests almost synchronously. In addition, when multimedia broadcast multicast service (Multimedia Broadcast Multicast Service, referred to as MBMS) terminals feed back service reception status information, if a large number of terminals are receiving MBMS services in a cell, at a ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
CPCH04W74/006H04W74/0833
Inventor 艾建勋戴谦张银成
Owner ZTE CORP
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