Reconfiguration method and reconfiguration system of relay subframes
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A subframe configuration and reconfiguration technology, applied in the field of wireless communication, can solve problems such as unreasonable RN subframe configuration and data congestion
Inactive Publication Date: 2016-05-25
HENAN UNIVERSITY OF TECHNOLOGY
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[0003] The purpose of the present invention is to provide a method and system for reconfiguring relay subframes to solve the problem of data congestion caused by unreasonable RN subframe configuration
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example 1
[0055] The following uses a specific OAM system as an example to illustrate, assuming that the initial uplink and downlink configuration mode of the DeNB cell in the OAM system is 1, the initial configuration mode of the Un subframe is 0, the subframe reconfiguration period T is 1s, and the DeNB downlink is allocated to the The maximum value T of the following node buffer max-eNodeB 3000000bytes, the maximum value of RN downlink buffer T max-relay is 250990bytes, and the buffer critical ratio α is 75%.
[0056] 1. The DeNB obtains the subframe configuration mode through the OperationAdministrationandMaintenance (OAM) system. The initial uplink and downlink configuration mode of the DeNB cell is 1, the initial configuration mode of the Un subframe is 0, and the subframe reconfiguration period T is 1s.
[0057] 2. The RN starts up, accesses the network through the normal UE attachment process, and obtains the initial configuration mode of the Un subframe as 0.
[0058] 3. Whet...
example 2
[0066] Assume that the initial uplink and downlink configuration mode of the DeNB cell in the OAM system is 1, the initial configuration mode of the Un subframe is 3, the subframe reconfiguration period T is 1s, and the maximum value T of the DeNB downlink allocated to the relay node buffer max-eNodeB 3000000bytes, the maximum value of RN downlink buffer T max-relay is 250990bytes, and the buffer critical ratio α is 75%
[0067] 1. The DeNB obtains the subframe configuration mode through the OperationAdministrationandMaintenance (OAM) system. The initial uplink and downlink configuration mode of the DeNB cell is 1, the initial configuration mode of the Un subframe is 3, and the subframe reconfiguration period T is 1s.
[0068] 2. The RN starts up, accesses the network through the normal UE attachment process, and obtains the initial configuration mode of the Un subframe as 3.
[0069] 3. Whether the current time reaches the Un subframe adjustment period, if it reaches the sub...
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Abstract
The invention relates to a reconfiguration method and a reconfiguration system of relay subframes, belonging to the technical field of wireless communication. The method comprises the following steps of: predicting traffic of an eNodeB and a Relay of next subframe adjusting period according to change conditions of the traffic of the eNodeB and the relay of former N subframe adjusting periods; and judging whether to increase a Un subframe or reduce the Un subframe according to the predicted traffic of a DeNB and the relay of the next subframe adjusting period, and performing reconfiguration for RN subframes according to the result, when increase of the subframes is required, selecting a subframe configuration mode capable of increasing the number of the subframes from Un subframe configuration modes corresponding to uplink and downlink configuration modes of a DeNB cell, and when decrease of the subframes is required, selecting the subframe configuration mode capable of decreasing the number of the subframes from the Un subframe configuration modes corresponding to the uplink and downlink configuration modes of the DeNB cell. Thus, configuration modes of the subframes can be adjusted according to the traffic, a problem of data congestion caused by unreasonable subframe configuration is avoided. The method and the system provided by the invention are simple and practicable, are easy to realize in engineering, and improve performance of relay nodes.
Description
technical field [0001] The invention relates to a method and system for reconfiguring a relay subframe, and belongs to the technical field of wireless communication. Background technique [0002] As an emerging technology, relay technology has attracted more and more attention, and is regarded as the key technology of B3G / 4G. In wireless communication systems, in order to increase coverage or provide hotspot services, the use of relay technology has become a important technical means. like figure 1 As shown, a relay node (RN, RelayNode) is connected to its home eNodeB cell in a wireless manner. After the RN is introduced, the backhaul link between the RN and its home eNodeB (Donor, DeNB) becomes the Un interface. In a Type1 trunk, the Un interface and the Uu interface use the same carrier resources. To avoid interference between the Un interface and the Uu interface, the two links work in a time-division manner. The 3GPP standard provides 19 Un subframe allocation methods...
Claims
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