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Method and device for downlink power control of trunking communication system based on embms

A technology of trunking communication and power control, which is applied in the field of mobile communication, can solve problems such as the inability to effectively control the downlink power of the trunking communication system, and achieve the effects of effective power control, performance optimization, and interference reduction

Active Publication Date: 2018-01-02
SHANGHAI ZTE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides an eMBMS-based trunking communication system downlink power control method and device to solve the problem that traditional power control methods cannot effectively control the eMBMS-based trunking communication system downlink power

Method used

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  • Method and device for downlink power control of trunking communication system based on embms
  • Method and device for downlink power control of trunking communication system based on embms
  • Method and device for downlink power control of trunking communication system based on embms

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Embodiment 1

[0059] This embodiment adopts a networking mode in which multiple cells of a single frequency network transmit simultaneously. The cluster users are randomly scattered in multiple cells of the single frequency network. The measurement information of the cluster users is aggregated to the MCE through the eNodeB, and the user measurement information is completed in the MCE. Analysis, and the downlink power control of the PMCH channel carried by the trunking service.

[0060] image 3 It is a schematic diagram of the PMCH channel downlink power control process in Embodiment 1, such as image 3 As shown, the PMCH channel downlink power control process in Embodiment 1 specifically includes:

[0061] Step S301: When the trunking service session is initially established, the downlink uses open-loop initial transmission power to ensure that all trunking service session users can receive it correctly. The open-loop initial transmit power is the downlink transmit power that satisfies ...

Embodiment 2

[0072] This embodiment adopts the transmission mode of a single cell in the single frequency network, Figure 4 It is a schematic diagram of the PMCH channel downlink power control process in Embodiment 2, such as Figure 4 As shown, in this embodiment, the PMCH channel downlink power control process specifically includes:

[0073] Step S401: When the trunking service session is initially established, the downlink uses open-loop initial transmission power to ensure that all trunking users can receive it correctly.

[0074] Step S402: the eNodeB receives the power measurement information fed back by the cluster users, and the eNodeB calculates the user's path loss and user distribution characteristics.

[0075] Step S403: According to the current service and application scenario, the eNodeB sets the proportion of users who can guarantee normal communication on each PMCH channel. If it is necessary to ensure that all cluster users can receive correctly, the proportion of users...

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Abstract

The invention discloses a trunked communication system downlink power control method based on the enhanced multimedia broadcast multicast service (eMBMS). The method includes that path losses of all trunked users on a physical multicast channel (PMCH) are sequenced from small to large; a corresponding path loss is found from a queue formed by the path loss sequencing according to the percentage of users which need to be guaranteed in normal communication by the trunked service, and considered as the maximum path loss of the users on the PMCH; and the downlink sending power of the PMCH is computed according to the maximum path loss of the users, and a practical downlink sending power is determined according to a power threshold used for judging whether adjacent region interference constraints are overrun and a community maximum sending power. The trunked communication system downlink power control method based on the eMBMS achieves effective control over trunked communication system downlink power and based on the eMBMS, and reduces trunked communication system interference. The invention further discloses a trunked communication system downlink power control device based on the eMBMS. The trunked communication system downlink power control device based on the eMBMS comprises a maximum path loss determining module, a sending power computing module, a sending power verification module and a power rating scale setting module.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a downlink power control method and device of an eMBMS (enhanced multimedia broadcast / multicast)-based mobile broadband trunking communication system. Background technique [0002] The MBMS (Multimedia Broadcast Multicast Service, Multimedia Broadcast Multicast Service) service has been supported in the third-generation mobile communication system, and eMBMS (EvolvedMultimedia Broadcast Multicast Service, enhanced multimedia broadcast / multicast) built in the fourth-generation mobile communication LTE system The business is regarded by the industry as a business with very applicable scenarios. The implementation method is that an intelligent terminal with a video function receives digital audio / video services in the form of broadcast / multicast through a PMCH (Physicalmulticast channel, physical multicast channel). For eMBMS service realization and network...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/10H04W52/14
Inventor 高扬曹春亮朱伏生杨兵
Owner SHANGHAI ZTE SOFTWARE CO LTD