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LTE-A system and resource distribution method of physical downlink control channel of relay link

A technology of physical downlink control and relay link, which is applied in the direction of transmission path sub-channel allocation, transmission path separation device, multi-frequency code system, etc., can solve problems such as research and resource allocation, and improve scheduling gain and link Road performance gain, guaranteed backward compatibility, flexible and simple multiplexing

Inactive Publication Date: 2014-12-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to provide a resource allocation method for the physical downlink control channel of the LTE-A system and its relay link, so as to solve the problem that the prior art has not yet carried out resource allocation for the specific physical downlink control channel of the eNode-B to RN link. research question

Method used

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  • LTE-A system and resource distribution method of physical downlink control channel of relay link
  • LTE-A system and resource distribution method of physical downlink control channel of relay link
  • LTE-A system and resource distribution method of physical downlink control channel of relay link

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Experimental program
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Embodiment 1

[0073] Such as Figure 5 As shown, the R-PDCCH occupies the 4th and 5th OFDM symbols of the 4th, 6th, 7th, 10th, 12th, 13th, and 14th PRBs (physical resource blocks) , which means that the multiplexing mode of R-PDCCH and R-PDSCH is TDM combined with FDM, that is, some OFDM symbols are occupied; for example Image 6 As shown, the R-PDCCH occupies all OFDM symbols except the PDCCH of the 6th, 7th, and 10th PRBs, which means that the multiplexing mode of the R-PDCCH and R-PDSCH is the FDM mode.

[0074] Currently, the system bandwidth supports 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, and 20MHz. A preferred example is to use TDM combined with FDM when the system bandwidth is greater than 1.4MHz, and use FDM when the system bandwidth is less than or equal to 1.4MHz.

[0075] Through this method, the system can flexibly configure the multiplexing mode of the R-PDCCH, which is suitable for application scenarios with small bandwidth and large bandwidth, reasonably utilizes time-frequency r...

Embodiment 2

[0077] Such as Figure 7 As shown, when using TDM combined with FDM, if the system statically configures fixed OFDM symbols for carrying R-PDCCH, a preferred example is the last OFDM symbol ending in the first slot in the subframe Symbols, of course, can also be terminated in other OFDM symbols; such as Figure 8 As shown, when the FDM method is adopted, there are OFDM symbols for transceiving conversion. For example, in the last OFDM symbol of the subframe, all OFDM symbols except the PDCCH and the OFDM symbols for transmitting and receiving are used to bear R-PDCCH .

[0078] The system statically configures fixed OFDM symbols to bear the R-PDCCH. This method does not increase signaling overhead, nor does it increase the design complexity of the eNode-B and RN sides.

Embodiment 3

[0080] Such as Figure 9 As shown, the 2 OFDM symbols represent the 4th and 5th OFDM symbols in the subframe. The figure on the left shows that the 4th OFDM symbol does not contain any reference symbols. Each of the 4th OFDM symbols in the physical resource block 4 subcarriers are 1 REG, and the 5th OFDM symbol contains CRS (such as R 0 , R 1 ), every 6 subcarriers in the 5th OFDM symbol in the physical resource block is 1 REG; the figure on the right shows that the 4th OFDM symbol does not contain any reference symbols, and the 4th OFDM Every 2 subcarriers in a symbol is 1 REG, the 5th OFDM symbol contains CRS, and every 3 subcarriers in the 5th OFDM symbol in the physical resource block is 1 REG.

[0081] The number of RNs in the system is much smaller than the number of UEs, so the REG size for R-PDCCH can be made smaller, so that more interleaving gain can be obtained during resource mapping, and the interference between cells can be reduced.

[0082] The resource alloc...

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Abstract

The present invention provides a resource allocation method for a relay link physical downlink control channel, which includes that a base station allocates resources for a relay link Physical Downlink Control Channel (PDCCH), wherein, the resources are all or a part of Orthogonal Frequency Division Multiplexing (OFDM) symbols of a physical resource block excluding the OFDM symbols occupied by the existing physical downlink control channel (S10). The present invention also provides a Long Term Evolution Advanced (LTE-A) system. The present invention can be applied to the link between the base station and the relay node very well, improve the scheduling gain and the link performance gain of the overall system, enable the multiplexing mode to be flexible and simple, thus ensuring the backward compatibility (being compatible with Long Term Evolution (LTE) system), and solving the problem that the relay node can correctly receive control information from the base station.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a resource allocation method of a physical downlink control channel of an LTE-A system and a relay link thereof. Background technique [0002] LTE (Long Term Evolution, long-term evolution) system, LTE-A (Long Term Evolution Advanced, advanced long-term evolution) system, and IMT-Advanced (International Mobile Telecommunication Advanced, advanced international mobile communication) system are based on OFDM (Orthogonal Frequency Division Multiplexing , Orthogonal Frequency Division Multiplexing) technology as the basis, in the OFDM system is mainly time-frequency two-dimensional data form, in LTE, LTE-A in RB (Resource Block, resource block; resource block mapping on physical resources is called A physical resource block (PhysicalResource Block, PRB)) is defined as an OFDM symbol in a continuous slot (time slot) in the time domain, and 12 or 24 subcarriers in the frequency domai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04L27/26
CPCH04L5/0007H04L5/003
Inventor 毕峰袁明梁枫杨瑾吴栓栓袁弋非
Owner ZTE CORP