Group service transmission method and apparatus based on PRACH (physical random access channel)

A technology of group business and transmission method, applied in broadcast service distribution, error prevention/detection using return channel, electrical components, etc., can solve problems such as waste of resources, and achieve the effect of improving accuracy

Active Publication Date: 2016-12-07
CHENGDU TD TECH LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the group service provided by the trunking communication is different from the MBMS service. If a grou...

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  • Group service transmission method and apparatus based on PRACH (physical random access channel)
  • Group service transmission method and apparatus based on PRACH (physical random access channel)
  • Group service transmission method and apparatus based on PRACH (physical random access channel)

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Embodiment Construction

[0055] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0056] figure 1 It is a flow chart of Embodiment 1 of the PRACH-based group service transmission method of the present invention, as shown in figure 1 As shown, the method of this embodiment may include:

[0057] S100. The base station pre-configures PRACH resources. The PRACH resources include: N groups of PRACHs and the corresponding relationship between each PRACH in each PRACH group and...

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Abstract

The invention provides a group service transmission method and apparatus based on a PRACH (physical random access channel). The method comprises the following steps: a base station configures PRACH resources in advance, wherein the PRACH resources comprise N groups of PRACHs and corresponding relations between each PRACH in each PRACH group with a CQI grade; and the base station sends a notification message to group UE in a group so that the group UE can feed NACK information to the base station through the PRACH resources, the base station, when it is detected that the UE feeds the NACK information back, obtains a CQI expected by the UE feeding back the NACK information through a CQI grade corresponding to the PRACH of the detected feedback NACK information, and the base station, according to the obtained CQI expected by at least one piece of UE, performs retransmission scheduling and adjusts the MCS of primary transmission of the next time, wherein the notification message comprises a group RNTI, carried configuration information and the PRACH resources. The group service transmission method and apparatus based on the PRACH, provided by the invention, can improve the accuracy of group service transmission and can also decentralize interference caused to a local cell and adjacent cells.

Description

technical field [0001] The present invention relates to the technical field of cluster communication, in particular to a PRACH-based group service transmission method and device. Background technique [0002] With the rapid development of trunking communication, it has become a general trend to support trunking communication in a long term evolution (Long Term Evolution, hereinafter referred to as: LTE) public network system. A basic service in trunking communication is a group call, and there are multiple user equipments (User Equipment, hereinafter referred to as UE) in a group. In the current LTE public network system, the multimedia broadcast multicast service (Multimedia Broadcast Multicast Service, hereinafter referred to as: MBMS) is sent in the following manner: in a multicast / multicast single frequency network (Multimedia Broadcast Multicast Service Single Frequency Network, hereinafter referred to as : MBMS Traffic Channel (MBMS Traffic Channel, referred to as: MT...

Claims

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Application Information

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IPC IPC(8): H04W4/08H04W72/08H04W74/08H04L1/16H04L1/18
Inventor 魏立梅陈迎杨小倩袁乃华徐绍君
Owner CHENGDU TD TECH LTD
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