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Method and system for obtaining downlink control information in mbsfn subframe

A control information and control channel technology, applied in the field of LTE systems, can solve the problems of inability to obtain downlink control information, inability to demodulate PDSCH, etc.

Active Publication Date: 2015-09-16
ZTE CORP
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Problems solved by technology

When the LTE-A UE is assigned any of the downlink transmission modes 1 to 6, the public reference signal (CRS, Cell-specific reference signal) is used for PDSCH demodulation, and when the LTE-A UE is in the MBSFN subframe In the middle, since there is no CRS on the MBSFN subframe, at present, the downlink control information cannot be obtained, so the demodulation of the PDSCH cannot be performed

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  • Method and system for obtaining downlink control information in mbsfn subframe
  • Method and system for obtaining downlink control information in mbsfn subframe

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no. 2 example

[0091] In the second embodiment, in the LTE-Advance UE-specific MBSFN subframe, PDCCH detection can still be performed according to any one of modes 1 to 9, or downlink transmission modes in versions after R10. When the base station notifies the use of downlink transmission modes 1 to 6, or adopts other modes and requires CRS for demodulation (the CRS on the unicast service frequency domain resource of the MBSFN subframe is used instead of the CRS on the entire bandwidth) During the demodulation of PDSCH), at this time, the CRS position is the same as the CRS position of the subframe except MBSFN, which is equivalent to the truncation processing of the CRS of the full bandwidth, only in the physical resource block that needs CRS for demodulation ( PRB, Physical Resource Block), other locations may or may not be sent. like Figure 5As shown in the shaded part in the middle, ordinary subframes (subframes other than MBSFN subframes) adopt a full-bandwidth CRS structure, while in...

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Abstract

A method and system for acquiring downlink control information in an MBSFN subframe. The method includes: a base station sending downlink control information to user equipment according to the determined downlink transmission mode (300); and the user equipment acquiring the downlink control information according to a corresponding downlink control information format in the determined downlink transmission mode on a multicast broadcast single frequency network (MBSFN) subframe (301). Proposed in the present invention is a solution for the problem of how to acquire downlink control information and carry out PDSCH demodulation and how to configure the downlink transmission mode with respect to the MBSFN subframe in Release R10 of LTE-Advance. The downlink control information in the MBSFN subframe can be acquired in the LTE-Advance system, thus the implementation of the demodulation of the PDSCH in the MBSFN subframe specific to the LTE-AUE in the LTE-Advance system is ensured.

Description

technical field [0001] The present invention relates to advanced LTE (LTE-Advance) system technology, in particular to a method and system for acquiring downlink control information in MBSFN subframes. Background technique [0002] A radio frame (RF, Radio Frame) in a Long Term Evolution (LTE, Long Term Evolution) system includes frame structures in a Frequency Division Duplex (FDD, Frequency Division Duplex) mode and a Time Division Duplex (TDD, Time Division Duplex) mode. [0003] figure 1 It is a schematic diagram of the frame structure of the FDD mode, such as figure 1 As shown, a wireless frame of 10 milliseconds (ms) consists of twenty slots (slots) with a length of 0.5ms and numbers 0 to 19, and slots 2i and 2i+1 form a subframe (subframe) with a length of 1ms i. [0004] figure 2 It is a schematic diagram of the frame structure of the TDD mode, such as figure 2 As shown, a 10ms radio frame consists of two half frames with a length of 5ms, a half frame includes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/12H04L1/00
CPCH04W76/002H04W72/1289H04W76/40H04W72/23
Inventor 吴欣戴博左志松
Owner ZTE CORP
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