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Method and device for determining relay link resource unit group, and base station

A technology of resource unit groups and relay links, which is applied in the field of determination of relay link resource unit groups, and can solve the problems of no reference technology and no research

Active Publication Date: 2018-07-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] At present, the physical downlink control channel (R-PDCCH, Relay link-Physical Downlink Control Channel) of the relay link and the physical downlink shared channel (R-PDSCH, Relay link-Physical Downlink Shared Channel) of the relay link The research on how to use it is a hot spot, but there is no research on technologies other than the size of the resource unit group of R-PDCCH, and of course there is no related reference technology

Method used

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  • Method and device for determining relay link resource unit group, and base station
  • Method and device for determining relay link resource unit group, and base station
  • Method and device for determining relay link resource unit group, and base station

Examples

Experimental program
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Effect test

Embodiment 1

[0154] Figure 4 It is a schematic diagram of the reference symbol bearing method when the CRS in the normal cyclic prefix unicast subframe corresponds to one antenna port, such as Figure 4 As shown, it represents a unicast subframe with a normal cyclic prefix, the subframe includes 2 time slots, and each time slot includes 7 OFDM symbols. It is assumed that the R-PDCCH and the R-PDSCH use a time division multiplexing (TDM, Time Division Multiplexing) combined with a frequency division multiplexing (FDM, Frequency Division Multiplexing) multiplexing mode, and the R-PDCCH starts from the first time slot. 4 OFDM symbols and terminates in the last OFDM symbol of the 1st slot.

[0155] In this embodiment, in order to facilitate the division of resource unit groups, the CRS corresponding to one antenna port is regarded as corresponding to two antenna ports. like Figure 4 As shown in the figure, the REs covered by the oblique lines in the figure represent the REs that carry CRS...

Embodiment 2

[0164] Figure 5 It is a schematic diagram of the reference symbol bearing method when the CRS and DMRS are carried in the normal cyclic prefix unicast subframe, such as Figure 5 As shown, what is shown at this time is a unicast subframe of a normal cyclic prefix, the subframe includes 2 time slots, and each time slot includes 7 OFDM symbols. It is assumed that R-PDCCH and R-PDSCH use TDM combined with FDM multiplexing, and R-PDCCH starts from the fourth OFDM symbol of the first slot and ends at the last OFDM symbol of the first slot . Figure 5 Among them, the REs covered by the sand dots are the REs that bear the DMRS, and the REs covered by the diagonal lines are the REs that bear the CRS.

[0165] On the 4th OFDM symbol in an RB in the 1st time slot, every 4 resource units are divided into 1 resource unit group, there are 3 resource unit groups in total, and every 4 complex symbols are mapped in one resource unit group On the 5th OFDM symbol in an RB in the 1st time sl...

Embodiment 3

[0168] Image 6 It is a schematic diagram of the reference symbol bearing method when the CRS and DMRS are carried in the multicast subframe of the extended cyclic prefix, such as Image 6 As shown, it represents a multicast subframe with extended cyclic prefix, the subframe includes 2 time slots, and each time slot includes 6 OFDM symbols. It is assumed that the R-PDCCH and the R-PDSCH are multiplexed by FDM, and the R-PDCCH starts from the fourth OFDM symbol of the first slot and ends at the last OFDM symbol of the second slot.

[0169] In this embodiment, two resource blocks in the frequency direction are bundled, the fourth OFDM symbol in one RB in the first time slot and the first and second in one RB in the second time slot On the 3rd and 4th OFDM symbols, every 4 resource units is a resource unit group, there are 6 resource unit groups in total, and every 4 complex symbols are mapped on the resource units in one resource unit group; On the 5th and 6th OFDM symbols in ...

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Abstract

The present invention discloses a method for determining a relay link resource unit group, which includes: determining a relay link according to at least one of the subframe type, the cyclic prefix type of the subframe, and the bearing mode of reference symbols in the subframe The resource unit group of the road. The present invention also discloses a device for determining a relay link resource unit group, including: a determining unit configured to select at least one of the subframe type, the cyclic prefix type of the subframe, and the bearing mode of the reference symbol in the subframe This information determines the resource unit group of the relay link. The manner in which the foregoing reference symbols are carried in the subframe is determined according to the type of the carried reference symbols and the number of antenna ports corresponding to the reference symbols. The invention also discloses a base station including the above device. The invention not only ensures the backward compatibility, that is, the compatibility with the LTE system, but also solves the problem of the size of the relay link resource unit group. The present invention makes little modification to the existing network protocol, and the technical solution is simple to realize and low in cost.

Description

technical field [0001] The present invention relates to a technology for determining a relay link resource unit group, and in particular, to a method and device for determining a relay link resource unit group, and a base station. Background technique [0002] The Long Term Evolution (LTE, Long Term Evolution) system, the Long Term Evolution Advanced (LTE-A, Long Term Evolution Advanced) system, and the International Mobile Telecommunication Advanced (IMT-Advanced, International Mobile Telecommunication Advanced) system are all based on orthogonal frequency division multiplexing ( OFDM, Orthogonal Frequency Division Multiplexing) technology-based communication system. OFDM technology mainly performs data transmission in the form of time-frequency two-dimensional data. figure 1 is a schematic diagram of the structure of resource blocks in subframes in the LTE-A system, such as figure 1 As shown, in the LTE and LTE-A systems, a resource block (RB, Resource Block) is defined ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L27/26H04W72/04
CPCH04B7/15542H04L5/0044H04L5/0058H04W72/04H04W84/047
Inventor 毕峰袁明梁枫杨瑾吴栓栓袁弋非
Owner ZTE CORP