Random access method, base station and user device

A technology for user equipment and random access preamble, applied in the field of communication, can solve the problems of trunked user equipment access request response, the inability to determine whether the user equipment requesting access belongs to ordinary user equipment or trunked user equipment, etc.

Inactive Publication Date: 2017-01-04
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are the following problems in the existing technical solutions: when the trunking network is started, the base station cannot determine whether the

Method used

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  • Random access method, base station and user device
  • Random access method, base station and user device
  • Random access method, base station and user device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] In this embodiment, the clustered user equipment is called IOPS UE for short, and the clustered network is assumed to be an IOPS network. This embodiment includes the following steps:

[0131] 1. The IOPS network is started. After the base station enters the IOPS mode, it sends broadcast messages and or proprietary signaling. After the IOPS UE reads the proprietary signaling or broadcast information sent by the base station, it disables the previous ordinary PRACH configuration index table (in the ordinary network used in ), enable the preset dedicated PRACH configuration index table (used in the IOPS network).

[0132] Wherein, the preset dedicated PRACH configuration index table is stored in the IOPS UE, but the normal PRACH configuration index table is not stored in the normal UE and still uses the previous common PRACH configuration index table. In addition, the time-frequency resources indicated by the same index number in the preset dedicated PRACH configuration ...

Embodiment 2

[0137] In this embodiment, the LTE system takes the FDD mode as an example to introduce in detail the preset dedicated PRACH configuration index table described in the embodiment of the present invention:

[0138] In the FDD mode, the preset dedicated PRACH configuration index table described in the embodiment of the present invention can be designed according to the existing Table 3, and the design principle is: the preset dedicated PRACH configuration index table is the same index number as in Table 3 The indicated time-frequency resources for sending the Preamble need to be completely different.

[0139] In order to facilitate the understanding of the above design principles, an example is given to illustrate:

[0140] Taking the Prach-Configuration Index as 0 as an example, according to Table 3, it can be seen that the UE should start sending the Preamble with the Preamble Format of 0 in the subframe with the subframe number of 1 in the even radio frame (the Preamble only ...

Embodiment 3

[0150] In this embodiment, the LTE system takes the TDD mode as an example to introduce in detail the preset dedicated PRACH configuration index table described in the embodiment of the present invention:

[0151] In TDD mode, the preset dedicated PRACH configuration index table described in the embodiment of the present invention can be designed according to the existing table 6, and the design principle is: the preset dedicated PRACH configuration index table has the same index number as in table 6 The indicated time-frequency resources for sending the Preamble need to be completely different.

[0152] Note: If the preamble format is 1, 2, 3, it means that the lengths of consecutive subframes occupied by the preamble are 2, 2, and 3 respectively. Therefore, it should also be avoided that when the preamble format indicated in the preset dedicated PRACH configuration index table is not 0, the subframe numbers continuously occupied by the preamble should not coincide with those...

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Abstract

The present invention discloses a random access method, a base station and a user device. The method comprises: after a cluster network starts, the base station sends cluster network information to a user device in a district covered by the base station, wherein the user device in the covered district includes a common user device and a cluster user device; after the cluster user device receives the cluster network information, it is determined that a common PRACH configuration index table stops using and a preset special PRACH configuration index table starts to use; the base station sends PRACH configuration parameters, wherein the PARCH configuration parameters include the PRACH frequency domain resource offset and the PRACH configuration index numbers; the cluster user device determines the time-frequency resource required when sending the random access front leading according to the PRACH configuration parameters and the preset special PRACH configuration index table; and the base station detects the random access front leading sent by the cluster user device on the corresponding time-frequency resource and sends the random access response message to the cluster user device.

Description

technical field [0001] The present invention relates to communication technology, especially to a random access method, base station and user equipment. Background technique [0002] The trunking communication system is developed to meet the needs of industry users for command and dispatch. It is a dedicated wireless communication system for specific industry applications. The main features of the trunking communication system different from the public radio mobile communication system are: in addition to providing the two-way conversation function of the mobile phone, it can also provide group (group) calls and all calls in the system, and even establish call priority levels, and can carry out Priority calls, emergency calls, and other communications that ordinary mobile phones do not have; it can also provide special functions such as dynamic reorganization and virtual private network within the system. These characteristics are especially suitable for the special communi...

Claims

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Application Information

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IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/02H04W74/008H04W48/10H04W74/08H04W74/0866H04W84/08
Inventor 杜婷
Owner ZTE CORP
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