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A method and system for detecting a downlink control channel of a relay node

A relay node, line control technology, applied in transmission systems, digital transmission systems, baseband system components and other directions, can solve problems such as no R-PDCCH, no implementation method, no solution, etc.

Inactive Publication Date: 2015-12-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is no specific implementation method, for example, how the subset is divided, the configuration method of the subset, etc., there is no corresponding plan
At present, there is no technical solution related to how to detect R-PDCCH in the existing technical solutions

Method used

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  • A method and system for detecting a downlink control channel of a relay node
  • A method and system for detecting a downlink control channel of a relay node
  • A method and system for detecting a downlink control channel of a relay node

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] In this example, the reserved N PRBs used to bear the R-PDCCH uniquely correspond to the division method of the subsets; wherein, the number of subsets that can be divided is set to m. Describe it in detail below.

[0077] The base station divides the N PRBs reserved semi-statically for carrying the R-PDCCH into m subsets, and the value of m and the size of the m subsets are uniquely determined by the value of N. The specific determination method is shown in Table 1, wherein the PRBs contained in each subset can be continuous or discrete, but the division method is unique, and the specific division method is shown in Table 1. The maximum number of subsets in Table 1 is 5. You can also set more than 5 subsets as needed. In Table 1, when there are multiple subsets, the PRBs allocated in each subset are as equal as possible.

[0078] Among them, no matter what the value of N is, there is a possibility that there is only one subset, as shown in Table 1, under various val...

Embodiment 2

[0085] In this example, the reserved N PRBs used to bear the R-PDCCH uniquely correspond to the division method of the subsets; wherein, the number of subsets that can be divided is set to m. The method for determining the value of m is exactly the same as that in Embodiment 1.

[0086] In this example, in addition to notifying the RN of all subset division methods, the base station also implicitly notifies each RN of the subset index number (subsetindex) to which each RN belongs.

[0087] First, the RN learns all subsets according to the N value and Table 1 notified by the network side; secondly, according to the implicit relationship between parameters such as the total number of subsets and the relay node identifier (RN-ID), the RN that bears itself is known. - the subset index where the PDCCH is located. As an implementation, the subsetindex where the R-PDCCH bearing the RN is located can be determined in the following manner:

[0088] subsetindex=RN-IDmodN subset , whe...

Embodiment 3

[0091] In this example, the reserved N PRBs used to bear the R-PDCCH uniquely correspond to the division method of the subsets; wherein, the number of subsets that can be divided is set to m. For the case where the m value is determined by the N value but not unique, the specific processing method is as follows:

[0092] The base station limits the value of m to {1, 2, 3, 4}, that is, the same value of N corresponds to 4 different values ​​of m. In order for the RN to determine the value of m, the network side needs to use 2 bits in the R-PBCH to notify the RN. For example, when N=15, the m value can be indicated in the following manner:

[0093] When the indication bit carried in the R-PBCH is 00, it means m=1, that is, there is only 1 subset;

[0094] When the indication bit carried in the R-PBCH is 01, it means that m=2, that is, it is divided into 2 subsets, and each subset has 7 and 8 PRBpairs respectively;

[0095] When the indication bit carried in the R-PBCH is 10, ...

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Abstract

The present invention discloses a method for detecting relay physical downlink control channel. The method includes the following steps: the network side divides available resources of relay physical downlink control channel (R-PDCCH) into subsets, and assigns at least one of the subsets to a relay node (RN); the RN determines its R-PDCCH in the assigned subset. The present invention also discloses a system for detecting relay physical downlink control channel, which is applied in the communication network including an RN. The system includes: a division unit, an assignment unit and a determination unit, wherein the division unit and the assignment unit are set at the network side, and the determination unit is set at the RN. The division unit is used for dividing the available resources of R-PDCCH at the network side into subsets; the assignment unit is used for assigning at least one of the subsets to the RN; and the determination unit is used for determining the R-PDCCH of the RN in the assigned subset. The present invention ensures that the relay node can detect the R-PDCCH correctly, reduces the complexity of blindly detecting the physical downlink control channel to a certain extent, and improves the processing efficiency.

Description

technical field [0001] The present invention relates to a determination technology of a relay node downlink control channel (R-PDCCH, RelayPhysicalDownlinkControlChannel), in particular to a method and system for detecting a relay node downlink control channel capable of determining an R-PDCCH allocation mode and bearing mode. Background technique [0002] Long Term Evolution (LTE, Long Term Evolution) system, Advanced Long Term Evolution (LTE-A, Long Term Evolution-Advanced) system and Advanced International Mobile Communication System (IMT-A, International Mobile Telecommunications-Advanced) all use Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing ) technology-based communication system. In the OFDM system, the data is in a time-frequency two-dimensional format, and a subframe (subframe) consists of 2 slots (slots). If a normal cyclic prefix (CP, CyclicPrefix) is used, each slot consists of 7 OFDM symbols; if Using extended CP, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/00H04W28/26H04L25/02H04L1/00
CPCH04W8/005H04W72/04H04W84/047
Inventor 袁明毕峰梁枫杨瑾吴栓栓袁弋非戴博
Owner ZTE CORP
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