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Digital trunked system down power control method and device based on enhanced multimedia broadcast multicast service (eMBMS)

A digital trunking system and power control technology, which is applied in the field of communication, can solve problems such as the inability to effectively control the downlink power of the digital trunking system, and achieve the effects of improving user experience, reducing inter-cell interference, and improving performance

Inactive Publication Date: 2013-05-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Digital trunked system down power control method and device based on enhanced multimedia broadcast multicast service (eMBMS)
  • Digital trunked system down power control method and device based on enhanced multimedia broadcast multicast service (eMBMS)
  • Digital trunked system down power control method and device based on enhanced multimedia broadcast multicast service (eMBMS)

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Experimental program
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Embodiment 1

[0055] For the centralized trunking service scenario, the MCE judges that all users carried on the PMCH channel will only occupy one or two cells in the single frequency network. At this time, the MCE notifies the eNodeB through control signaling, and the eNodeB alone completes the power control of the PMCH channel. . Such as figure 2 Among the seven cells of the single frequency network shown, if the users are concentrated in one of the cells, considering the energy saving of the eNodeB of the single frequency network, and the transmission of one cell can meet the receiving needs of the users, there will only be cluster users The cells in the cell transmit downlink power, while the other 6 cells do not transmit power on the PMCH channel.

[0056] In this embodiment, the specific implementation steps of the inventive method are as follows:

[0057] S1: Divide each cell into three power areas, namely central area, middle area and edge area, and transmit powers are A, B and C...

Embodiment 2

[0069] For the scenario of distributed trunking services, the trunking users are dispersed in multiple cells of the single frequency network. At this time, the MCE summarizes the distribution of users on the PMCH channel in all cells, and counts the number of users in each power area, and calculates the The distribution of users in each power zone determines the downlink transmission power of the PMCH channel, and the MCE maps this power value into a power index and sends it to each eNodeB.

[0070] In this embodiment, the specific implementation steps of the inventive method are as follows:

[0071] S1: Divide the cell group into three areas, namely central area, middle area and edge area. Each area corresponds to a type of transmission power, wherein, the central area is the transmission power type A, the middle area is the transmission power type B, and the edge area is the transmission power type C. During open-loop transmission, the power of the open-loop initial transmi...

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Abstract

The invention discloses a digital trunked system down power control method based on an enhanced multimedia broadcast multicast service (eMBMS). The digital trunked system down power control method includes that a single frequency network is divided into N power areas, and an initial sending power is arranged on each power area, each power area corresponding to the initial sending power is added in accordance with a central area of a community to an edge area of the community in sequence, the N is an integer which is greater than 2 or equal to 2; according to distributed situations of users in each power area, a down link initial sending power is ensured; according to changes of the maximum road damage of the users, the down link sending power is in tiny adjustment. With the help of the technical scheme, the initial sending power of the trunk service down link can be ensured quickly. And power changes of the users can be followed the tracks effectively. User experience is promoted. The invention further discloses a digital trunked system down power control device based on the eMBMS. The digital trunked system down power control device based on the eMBMS comprises a power area divided module, a down power determination module and a power adjustment module.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a downlink power control method and device of an eMBMS (Evolved Multimedia Broadcast Multicast Service, enhanced multimedia broadcast / multicast) broadband digital trunking communication system. Background technique [0002] LTE (Long Term Evolution, long-term evolution) is a next-generation mobile broadband network standard defined by 3GPP (Third Generation Partnership Project, third-generation mobile communication system cooperation project). Using OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology and introducing MIMO (Multiple-Input Multiple-Out-put, multiple output multiple output) and other technologies; at the same time, it can support 1.25-20MHz bandwidth, greatly improving peak data Speed ​​and system capacity; the flat network structure enhances the efficiency of scheduling and radio resource control...

Claims

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Application Information

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IPC IPC(8): H04W52/14H04W52/24H04W52/34
CPCH04W52/322H04W52/143H04W52/242H04W52/327
Inventor 高扬杨兵黄佩周玉芬
Owner ZTE CORP