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Method, device and system for configuring multicast broadcast single frequency network (MBSFN) sub-frames

A subframe and subframe configuration technology, applied in the field of communication, can solve the problems of downlink data accumulation in RN, inability to accurately know the channel quality of RN traffic, and low throughput of R-UE downlink data, so as to achieve data capacity balance and improve The overall data throughput performance and the effect of avoiding data blocking

Active Publication Date: 2011-08-10
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The DeNB cannot accurately know the size of the traffic that the RN needs to carry and the channel quality of the access link. Therefore, the allocated MBSFN subframe may not be able to meet the resource requirements of the access link
For example, if the quality of the backhaul link channel is very good, and the DeNB defaults that the quality of the access link channel is also very good, then the DeNB will allocate 5 MBSFN subframes (DL backhaul subframes) to the RN in one radio frame (10 subframes), then RN only has 5 subframes available for access link, which may cause the downlink data sent by DeNB to RN to not be sent by RN to R-UE in time, resulting in the accumulation of downlink data in RN, or even packet loss
Conversely, if the DeNB allocates very few access link MBSFN subframes to the RN, the amount of downlink data to the R-UE may be lower than the expected throughput

Method used

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  • Method, device and system for configuring multicast broadcast single frequency network (MBSFN) sub-frames
  • Method, device and system for configuring multicast broadcast single frequency network (MBSFN) sub-frames
  • Method, device and system for configuring multicast broadcast single frequency network (MBSFN) sub-frames

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Embodiment 1: The initial operating parameters reported by the RN include built-in MBSFN subframe configuration reference information.

[0104] Embodiment 1 is applicable to initial configuration of MBSFN subframes.

[0105] First, when establishing a connection with the DeNB, the RN carries the initial operating parameters configured by the operator in the RRC connection request or other uplink RRC messages.

[0106] These initial operating parameters can be used to indicate what purpose the RN is used for, such as hot spot coverage, suburban coverage, etc. On the other hand, the above initial operating parameters can also include the number of MBSFN subframes expected by the RN or access link downlink The number of subframes, or characteristic parameters of the RN, such as the number of RN receiving and transmitting antennas, the radio frequency capability of the RN, the maximum transmitting and receiving rate of the RN, and the like.

[0107] Secondly, according to ...

Embodiment 2

[0113] Embodiment 2: RN reports MBSFN subframe configuration information downloaded from OAM to DeNB

[0114] Embodiment 2 is applicable to the initial configuration of the MBSFN subframe.

[0115] First, after the RN establishes a connection with the DeNB, it downloads the MBSFN subframe configuration reference information from the OAM. The MBSFN subframe configuration reference information is used to indicate the purpose of the RN, such as hotspot coverage, suburban coverage, etc., and can also be Contains the number of MBSFN subframes expected by the RN or the number of downlink subframes on the access link;

[0116] Secondly, the RN reports the MBSFN subframe configuration reference information to the DeNB, that is, the number of MBSFN subframes expected by itself or the number of downlink subframes of the access link;

[0117] Thirdly, according to the RN request and other information, such as macro UE resource requirements, interference coordination requirements, etc., ...

Embodiment 3

[0120] Embodiment 3: The DeNB reconfigures the MBSFN subframe under the RN according to the PRB occupancy information reported by the RN.

[0121] First, the RN reports the PRB occupation information of the access link in a triggered or periodic manner.

[0122] In this embodiment, the reported content may be the statistical average PRB occupancy number, or the ratio of the statistical average PRB occupancy number to the total number of PRBs, or the instruction to increase or decrease the MBSFN subframe obtained according to the PRB occupancy threshold, or according to the PRB occupancy The threshold is an indication that the downlink subframe of the access link needs to be increased or decreased.

[0123] Secondly, according to the MBSFN subframe configuration reference information reported by the RN, combined with the channel quality of the backhaul link, such as macro UE resource requirements, interference coordination requirements, etc., the DeNB determines the number and ...

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Abstract

The invention relates to the field of communication, and discloses a method, a device and a system for configuring multicast broadcast single frequency network (MBSFN) sub-frames, which are used for balancing the data throughput of a long term evolution advanced (LTE-A) system. The method comprises that: a relay node reports MBSFN configuration reference information which is locally configured or downloaded by an operation administration and maintenance (OAM) entity, and a donor E-UTRAN NodeB (DeNB) can acquire the resource need conditions of an access link of the relay node according to the received MBSFN configuration reference information to configure an accurate number of MBSFN sub-frames at accurate positions for the RN. Therefore, the phenomenon of data jamming or small data volume in the system can be avoided, the data capacity of the system can be balanced, and the overall data throughput performance of the system can be further improved effectively. Simultaneously, the invention discloses the DeNB, the RN and a communication system.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for configuring an MBSFN subframe. Background technique [0002] refer to figure 1 As shown, in a Long Term Evolution Advanced (LTE-A) system, a user terminal (User Equipment, UE) is connected to a relay node (Relay Node, RN) or a donor base station (Donor E - UTRAN NodeB, DeNB). The interface between UE and RN, UE and DeNB is called Uu interface. The UE connected to the RN is also called the R-UE, and the UE directly communicating with the DeNB is called the macro UE. [0003] The introduction of RN makes there are three wireless links in the Relay-based mobile communication system: the direct link of DeNB->macro UE, the backhaul link of DeNB->RN and the link of RN->R-UE For an access link (access link), considering the signal interference limitation of wireless communication, the above three links need to use orthogonal wireless resourc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04W72/04
Inventor 谌丽刘佳敏鲍炜杨晓东
Owner DATANG MOBILE COMM EQUIP CO LTD
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