Method and device for configuring demodulation reference symbols of enhanced common search space

A technology of public search space and demodulation reference symbols, which is applied in the direction of digital transmission system, multiple use of transmission path, error prevention, etc., can solve the problem of demodulation enhanced public search space, UE cannot obtain effective DMRS, signal overlap, etc. problem, to achieve the effect of improving transmission rate and utilization, improving demodulation performance and reliability, and increasing capacity

Active Publication Date: 2018-03-23
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] Embodiments of the present invention provide a method and device for configuring demodulation reference symbols in an enhanced common search space, to solve the problem of overlapping signals between cells in the prior art, resulting in the inability of UEs in the cells to obtain effective DMRS and fail to obtain effective DMRS based on effective DMRS. DMRS Demodulation Enhancement Common Search Space Problem

Method used

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  • Method and device for configuring demodulation reference symbols of enhanced common search space
  • Method and device for configuring demodulation reference symbols of enhanced common search space
  • Method and device for configuring demodulation reference symbols of enhanced common search space

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Embodiment 1

[0031] Figure 4 It shows the working flow diagram of the DMRS configuration method for enhancing the common search space provided by the embodiment of the present invention, as shown in Figure 4 As shown, the method includes:

[0032] Step 401 , during initial network configuration or network optimization, configure DMRSs with different antenna ports for each adjacent cell.

[0033] Specifically, specific configuration operations can be performed in the following two ways:

[0034] Configuration method 1. For the cell currently to be allocated, the value of the cell ID of the cell is used to modulo the predetermined parameter to obtain the modulus result. According to the corresponding relationship between the predetermined index value and the DMRS of the antenna port, the value of the modulus result will be the same The DMRS of the antenna port corresponding to the index value of is configured for the cell;

[0035] For example, by dividing the value of the cell ID of th...

Embodiment 2

[0069] In this scenario, there are 7 adjacent cells, that is, cell N~cell N+6, and each cell includes a macro base station and a low-power base station (pico). The schematic diagram of this scenario can be shown as Figure 9 shown.

[0070] In this scenario, as Figure 10 As shown, the process of configuring the DMRS of the enhanced common search space for each adjacent cell includes the following steps:

[0071] Step 1001. In the process of network initial configuration or network optimization, in a layered network including macro base stations and low-power base stations, configure DMRS with different antenna ports for adjacent macro base stations, so that they are within the coverage of the same macro base station. DMRS configured with different antenna ports for low-power base stations;

[0072] Preferably, the adjacent macro base stations are configured with DMRSs that occupy different antenna ports of different REs in OFDM symbols, and the low-power base stations withi...

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Abstract

The present invention discloses a configuration method and device for demodulation reference symbol DMRS of enhanced public search space. By configuring DMRS with different antenna ports for each adjacent cell, UEs in each adjacent cell can pass through different antenna ports respectively. DMRS demodulation enhances the common search space. Since DMRSs of different antenna ports occupy different positions of REs in OFDM, when there is no signal overlap between cells, UEs in each cell can obtain effective DMRSs, and even if multiple The overlap of signals between adjacent cells leads to the overlap of the enhanced common search space, which can also reduce the possibility of DMRS overlap between adjacent cells, thereby improving the possibility that the UE in the cell can obtain an effective DMRS, and according to the effective The DMRS demodulates the enhanced common search space, and can effectively obtain the control information in the enhanced common search space.

Description

technical field [0001] The present invention relates to a mobile communication system, in particular to a configuration method and device for demodulation reference symbols of an enhanced common search space. Background technique [0002] In the Long Term Evolution (LTE) Rel-8 / 9 / 10 system, the Physical Downlink Control Channel (PDCCH) is transmitted in each wireless downlink subframe; and in the Physical Resource Block (Physical Resource Block) When the number of Resource Block (PRB) is greater than 10, the PDCCH occupies the first 1 to 3 Orthogonal Frequency Division Multiplexing (OFDM) symbols of each downlink subframe. When the number of PRB is greater than 10 , the PDCCH occupies the first 2~4 OFDM symbols of each downlink subframe, and demodulates the PDCCH based on the Cell-specific Reference Signal in the system; wherein, the first 1~3 OFDM symbols are called It is a "traditional PDCCH region", which may also be called a control region. figure 1 is a schematic diagr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L1/00H04L5/00
Inventor 郑毅史志华王锐胡丽洁胡臻平
Owner CHINA MOBILE COMM GRP CO LTD
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