Method and device for determining joint transmission cells

A joint transmission and cell technology, applied in the field of network communication, can solve the problems of unpredictable and undetermined unicast transmission interference.

Active Publication Date: 2011-01-05
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, CoMP in the LTE-A system is mainly designed in unicast subframes. For example, RSRP (reference signal received power, reference signal received power) is used to measure the signal strength RSSI (Received Signal Strength Indicator, receive channel strength), select the joint transmission cell according to RSSI, but because there are multiple MIMO (Multiple-Input Multiple-Out-put) modes in eNodeB unicast, the unicast transmission interference of surrounding cells cannot be predicted Yes, in the case of unpredictable interference, it is impossible to determine whether the selected joint transmission cell is sufficient to provide sufficient SINR (Signal to Interference and Noise Ratio, Signal to Interference and Noise Ratio) for the UE

Method used

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  • Method and device for determining joint transmission cells

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Embodiment 1

[0024] see figure 1 , an embodiment of the present invention provides a method for determining a joint transmission cell, the method comprising:

[0025] 101: According to the CSI (Channel State Information, channel state information) of each cell in the report set sent by the UE, obtain the signal-to-interference and noise ratio SINR of the signal received by the UE, and select the cell that will make the SINR of the signal received by the UE reach a preset threshold into a cooperative collection;

[0026] Specifically, only the serving cell provides services to the UE at the beginning, and the cells in the reporting set are used to configure PMCH (Physical Multicast Channel, Physical Multicast Channel) for unicast transmission. Select the strong cell into the cooperation set, and then calculate whether the SINR of the signal received by the UE reaches the preset threshold. If not, select the cell with the strongest interference in the report set that is not selected into th...

Embodiment 2

[0050] see figure 2 , an embodiment of the present invention provides a method for determining a joint transmission cell, the method comprising:

[0051] 201: According to the CSI of each cell in the report set sent by the UE, obtain the signal-to-interference and noise ratio SINR of the signal received by the UE, and select the cell whose SINR of the signal received by the UE reaches a preset threshold value into the cooperation set;

[0052] Specifically, only the serving cell provides services to the UE at the beginning, and the cells in the reporting set are used to configure PMCH (Physical Multicast Channel, Physical Multicast Channel) for unicast transmission; Select the strong cell into the cooperation set, and then calculate whether the SINR of the signal received by the UE reaches the preset threshold. If not, select the cell with the strongest interference in the report set that is not selected into the cooperation set into the cooperation set according to the CSI. ...

Embodiment 3

[0076] see image 3 , an embodiment of the present invention provides a device for determining a joint transmission cell, the device includes: a selection module 301 and a negotiation module 302;

[0077] The selection module 301 is configured to obtain the signal-to-interference and noise ratio (SINR) of the signal received by the UE according to the CSI of each cell in the report set sent by the UE, and select the cell whose SINR of the signal received by the UE reaches a preset threshold into the cooperation set;

[0078]Specifically, at the beginning, only the cell served by the device provides services to the UE, and the cells in the reporting set are used to configure PMCH for unicast transmission; first, the cell with the strongest interference in the reporting set is selected into the cooperation set according to the CSI sent by the UE , and then calculate whether the SINR of the signal received by the UE reaches the preset threshold, if not, select the cell with the s...

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Abstract

The embodiment of the invention discloses a method and a device for determining joint transmission cells, belonging to the field of network communication. The method comprises the following steps of: acquiring the signal to interference plus noise ratio (SINR) of a signal received by user equipment (UE) according to the channel status information (CSI) of each cell in a report set sent by the UE, and selecting the cells with the SINR reaching a preset threshold into a cooperation set; and negotiating with each cell in the cooperation set, and determining the cells successfully negotiated as the joint transmission cells. The device comprises a selection module and a negotiation module. The technical scheme provided by the embodiment can be used for predicting transmission interference from surrounding cells so as to ensure that sufficient SINR is provided to the UE.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a method and device for determining a joint transmission cell. Background technique [0002] LTE (Long Term Evolution, long-term evolution) / LTE-A is gradually regarded as the most competitive quasi-4G communication standard, EMBMS (Enhanced Multimedia Broadcast / Multicast Service, enhanced multimedia broadcast service) is the LTE / LTE-A uses an important service that must be supported by the mobile communication system, such as mobile TV, to provide a more efficient way for the LTE network to transmit multimedia information to each LTE terminal in the form of multicast or broadcast. In order to improve the spectrum efficiency of edge users, the LTE system introduces the CoMP (Coordinated multi-point Transmission, coordinated multi-point transmission) technology that serves a single UE through multi-base station cooperative transmission. This CoMP technology not only adds anten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04B7/04H04W4/06H04W24/10
Inventor 孙国林高秀娟
Owner HUAWEI TECH CO LTD
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