CN105611572B - A kind of method for reconfiguration and system of relay sub-frame - Google Patents
A kind of method for reconfiguration and system of relay sub-frame Download PDFInfo
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- CN105611572B CN105611572B CN201610089342.4A CN201610089342A CN105611572B CN 105611572 B CN105611572 B CN 105611572B CN 201610089342 A CN201610089342 A CN 201610089342A CN 105611572 B CN105611572 B CN 105611572B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0289—Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention relates to a kind of method for reconfiguration of relay sub-frame and systems, belong to wireless communication technology field.The present invention adjusts period eNodeB and Relay portfolio situation of change according to top n subframe,Predict the portfolio of next subframe adjustment period eNodeB and Relay,The portfolio that the DeNB and Relay in period are adjusted according to the next subframe predicted judges whether to need to increase Un subframes or reduces Un subframes,And RN subframes are reconfigured according to result,When needing to increase subframe,According to the selection increased sub-frame configuration mode of number of sub-frames in the corresponding Un sub-frame configurations mode of DeNB cell uplink-downlink configuration modes,When needing to reduce subframe,According to the sub-frame configuration mode for choosing number of sub-frames reduction in the corresponding Un sub-frame configurations mode of DeNB cell uplink-downlink configuration modes,The configuration mode of subframe is adjusted according to portfolio to realize,The problem of avoiding the data congestion caused by sub-frame configuration is unreasonable,The present invention is simple and practicable,It is easily achieved in engineering,Improve the performance of relay node.
Description
Technical field
The present invention relates to a kind of method for reconfiguration of relay sub-frame and systems, belong to wireless communication technology field.
Background technology
Relaying technique causes more and more extensive attention as a kind of emerging technology, is considered as the key of B3G/4G
Technology in order to increase coverage area or provide hot spot service, is had become important in a wireless communication system using relaying technique
Technological means.As shown in Figure 1, relay node (RN, Relay Node) is wirelessly connected to the eNodeB of its ownership
Cell, after introducing RN, the backhaul link between the eNodeB (Donor, DeNB) that RN belongs to it becomes Un interfaces.In Type1
In relaying, Un interfaces use identical carrier resource with Uu interfaces, to avoid generating interference, two chains between Un interfaces and Uu mouthfuls
Road is worked using time division way.The 19 kinds of Un subframes distribution sides configured by high-level signaling by DeNB are provided in 3GPP standards
Formula, as shown in table 1.19 kinds of configuration modes of Un subframes are only provided in existing standard, but according to which kind of method, how to select to match
Set and do not specifically give, if Un subframes reconfigure it is unreasonable if, necessarily cause the congestion of data, influence relay system
Energy.
Invention content
The object of the present invention is to provide a kind of method for reconfiguration of relay sub-frame and systems, to solve due to RN sub-frame configurations
Unreasonable the problem of causing data congestion.
The present invention provides a kind of method for reconfiguration of relay sub-frame to solve above-mentioned technical problem, the method for reconfiguration packet
Include following steps：
1) period DeNB and RN portfolio situation of change is adjusted according to top n subframe, predicts next subframe adjustment period
DeNB and RN portfolios；
2) judge whether to need to increase Un according to the portfolio of the DeNB and Relay in the next subframe adjustment period predicted
Subframe reduces Un subframes, and is reconfigured to RN subframes according to result.
When needing to increase subframe, current subframe mode is adjusted to corresponding RN of DeNB cell uplink-downlink configuration modes
The increased sub-frame configuration mode of number of sub-frames in frame configuration mode；When needing to reduce subframe, current subframe mode is adjusted to
The sub-frame configuration mode of number of sub-frames reduction in the corresponding RN sub-frame configurations mode of DeNB cell uplink-downlink configuration modes.
The business that the DeNB portfolios in the next subframe adjustment period predicted in the step 1) are current period DeNB
Amount is plus the average value of top n subframe adjustment period DeNB portfolio variation, the RN industry in the next subframe adjustment period predicted
Business amount is that the portfolio of current period RN adjusts the average value of period RN portfolio variation plus top n subframe.
For downlink subframe, the criterion for increasing subframe in the step 2) is：
Wherein, T 'eNodeBWith T 'relayThe respectively DeNB and RN downlink traffics of current period,WithThe respectively average value of top n subframe adjustment period DeNB and RN downlink traffic variation, Tmax-eNodeBIt is that DeNB is
The buffer traffic peak of relay node distribution, Tmax-relayIt is RN down buffer storage device traffic peaks, α is facing for buffer
Boundary's ratio, 0<α<1.
For downlink subframe, the criterion that subframe is reduced in the step 2) is：
Wherein, T 'eNodeBWith T 'relayThe respectively DeNB and RN downlink traffics of current period,WithThe respectively average value of top n subframe adjustment period DeNB and RN downlink traffic variation, Tmax-eNodeBIt is that DeNB is
The buffer traffic peak of relay node distribution, Tmax-relayIt is RN down buffer storage device traffic peaks, α is facing for buffer
Boundary's ratio, 0<α<1.
It is that DeNB carries out RN subframe adjustment according to court verdict, and is reconfigured RN by RRC signaling in the step 2)
Message is sent to RN, and completing subframe in RN reconfigures, and notifies DeNB is re-matched to complete by RRC signaling.
The present invention also provides a kind of reconfiguration system of relay sub-frame, which includes prediction module and judgement
Module is adjusted,
The prediction module is used to adjust period DeNB and RN portfolio situation of change according to top n subframe, under prediction
One subframe adjusts DeNB the and RN portfolios in period；
The judgement adjustment module is used for the business of DeNB and Relay according to the next subframe adjustment period predicted
Amount judges whether to need to increase subframe or reduces subframe, and is reconfigured to RN subframes according to result.
Current subframe mode is adjusted in DeNB cells by the judgement adjustment module when judging to need to increase subframe
The increased sub-frame configuration mode of number of sub-frames in the corresponding RN sub-frame configurations mode of downstream arrangements mode；When judging to need to reduce
When subframe, current subframe mode is adjusted to subframe in the corresponding RN sub-frame configurations mode of DeNB cell uplink-downlink configuration modes
The reduced sub-frame configuration mode of number.
It is described to judge that adjustment module is for the criterion for increasing subframe for downlink subframe：
Wherein, T 'eNodeBWith T 'relayThe respectively DeNB and RN downlink traffics of current period,WithThe respectively average value of top n subframe adjustment period DeNB and RN downlink traffic variation, Tmax-eNodeBIt is that DeNB is
The buffer traffic peak of relay node distribution, Tmax-relayIt is RN down buffer storage device traffic peaks, α is facing for buffer
Boundary's ratio, 0<α<1.
It is described to judge that adjustment module is for the criterion for reducing subframe for downlink subframe：
Wherein, T 'eNodeBWith T 'relayThe respectively DeNB and RN downlink traffics of current period,WithThe respectively average value of top n subframe adjustment period DeNB and RN downlink traffic variation, Tmax-eNodeBIt is that DeNB is
The buffer traffic peak of relay node distribution, Tmax-relayIt is RN down buffer storage device traffic peaks, α is facing for buffer
Boundary's ratio, 0<α<1.
The beneficial effects of the invention are as follows:The present invention adjusts the variation of period eNodeB and Relay portfolio according to top n subframe
Situation predicts the portfolio of next subframe adjustment period eNodeB and Relay, the period is adjusted according to the next subframe predicted
The portfolio of DeNB and Relay judges whether to need to increase Un subframes or reduces Un subframes, and is carried out to RN subframes according to result
It reconfigures, when needing to increase subframe, is chosen according in the corresponding Un sub-frame configurations mode of DeNB cell uplink-downlink configuration modes
The increased sub-frame configuration mode of number of sub-frames, it is corresponding according to DeNB cell uplink-downlink configuration modes when needing to reduce subframe
The sub-frame configuration mode that number of sub-frames reduction is chosen in Un sub-frame configuration modes, to realize the configuration according to portfolio to subframe
Mode is adjusted, the problem of avoiding the data congestion caused by sub-frame configuration is unreasonable, and this method is simple and practicable, work
It is easily achieved in journey, improves the performance of relay node.
Description of the drawings
Fig. 1 is the connection diagram of relay node RN；
Fig. 2 is RN configuration schematic diagrams；
Fig. 3 is relay sub-frame configuration flow chart.
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings.
A kind of embodiment of the method for reconfiguration of relay sub-frame of the present invention
Un interfaces and Uu interfaces need the time-division to work in being relayed due to Type1, so DeNB needs for Type1 link deployments
Un subframes, so that RN determines that the time of the progress data transmit-receive on Un interfaces, the start-up course of RN can be divided into two stages,
First stage, RN access network, and are connected to OAM systems and download initial configuration parameters.RN start-up courses second stage and
After, DeNB can re-match Un mouthfuls of parameters using RN reconfiguration courses, as shown in Figure 2.
From the point of view of 19 kinds of current Un sub-frame configuration modes, subframe is carried out according to portfolio and is reconfigured mainly for Un downlinks
Subframe increases or decreases, therefore the present embodiment is illustrated with the adjustment of Un downlink subframes, but the present invention is not limited solely to downlink.This
Embodiment subframe reconfiguration course is as shown in Figure 3：Specific configuration step is as follows：
1.DeNB passes through operation management maintainance (Operation Administration and Maintenance, OAM)
System obtains DeNB cell uplink-downlink configuration modes and sub-frame configuration mode.
2. starting relay node RN, network is accessed using common UE attaching process, obtains initial configuration.
3. setting Un subframes adjusts the period, judge whether to reach the Un subframes adjustment period, if reaching, according to Un subframe tune
Whole criterion is adjusted.
The portfolio that the DeNB portfolios in next subframe adjustment period are current period DeNB is plus top n subframe adjustment week
The RN portfolios of the average value of phase DeNB portfolio variation, the next subframe adjustment period predicted are the business of current period RN
Average value of the amount plus the adjustment period RN portfolio variation of top n subframe.
DeNB the and RN downlink traffics variation of current period T is respectively ΔeNodeBAnd Δrelay, i.e.,
ΔeNodeB=T 'eNodeB-TeNodeB Δrelay=T 'relay-Trelay
Wherein T 'eNodeB、T′relayThe respectively DeNB and RN downlink traffics of current period T, TeNodeB、TrelayIt is upper one
DeNB the and RN downlink traffics of cycle T then can similarly calculate adjustment period DeNB and RN the downlink business quantitative change of top n subframe
The average value of change is respectivelyWithRelaying passes through buffer status report (Buffer Status shown in table 2
Reports, BSR) it indicates downlink traffic being reported to DeNB.ENodeB is by predicting that next subframe adjusts the DeNB of cycle T
With RN downlink traffics, subframe adjustment is carried out, if：
Then increase Un downlink subframes；Wherein, Tmax-eNodeBIt is the buffer traffic peak that DeNB is relay node distribution,
Tmax-relayIt is RN down buffer storage device traffic peaks, α is the aritical ratio of buffer, 0<α<1.
If：Then reduce Un
Downlink subframe, otherwise subframe do not adjust.
Table 1
Table 2
4.DeNode carries out Un subframe adjustment according to subframe court verdict, and is sent out RN reconfiguration messages by RRC signaling
RN is given, when needing to increase subframe, current subframe mode is adjusted to corresponding RN of DeNB cell uplink-downlink configuration modes
The increased sub-frame configuration mode of number of sub-frames in frame configuration mode；When needing to reduce subframe, current subframe mode is adjusted to
The sub-frame configuration mode of number of sub-frames reduction in the corresponding RN sub-frame configurations mode of DeNB cell uplink-downlink configuration modes.RN is completed
Subframe reconfigures, and notifies eNodeB is re-matched to complete by RRC signaling.
Example 1
It is illustrated by taking a certain specific OAM systems as an example below, it is assumed that the OAM system DeNB cell initial uplink and downlinks are matched
It is 0 that set mode, which be 1, Un subframes initial configuration mode, and it is 1s that subframe, which reconfigures cycle T, and DeNB downlinks distribute to relay node
The maximum of T of buffermax-eNodeBFor 3000000bytes, RN downlink buffer maximum of Tmax-relayFor 250990bytes,
Buffer aritical ratio α is 75%.
1.DeNB passes through operation management maintainance (Operation Administration and Maintenance, OAM)
System obtains sub-frame configuration mode, and DeNB cell initials uplink-downlink configuration mode is that 1, Un subframes initial configuration mode is 0, subframe
It is 1s to reconfigure cycle T.
2.RN starts, and network is accessed using common UE attaching process, and it is 0 to obtain Un subframe initial configuration modes.
3. whether current time reaches the Un subframes adjustment period, subframe adjustment is carried out if reaching the subframe adjustment period and is sentenced
Certainly, otherwise terminate.
4. if the subframe adjustment period reaches, adjusting criterion according to Un subframes is adjusted, it is assumed that current period eNodeB
It is transferred to relaying downlink traffic T 'eNodeBFor 2439678bytes, RN downlink traffics are reported by BSR is designated as 25, i.e.,
1162<T′relay<=1429, take N=5, the average value of preceding 5 sub- framing control period eNodeB and Relay downlink traffic variationsIt can be calculated next subframe adjustment period eNodeB and Relay
Downlink traffic predicted value be respectively 3145334bytes and 4086,
Then increase Un downlink subframes.
5.DeNode carries out Un subframe adjustment according to the 4th step frame court verdict, by Un sub-frame configurations mode by 0 adjustment
It is 2, and RN reconfiguration messages is sent to by RN by RRC signaling.
6.RN completes Un sub-frame configuration modes and changes, and subframe re-matching is set to 2, and notify eNodeB weights by RRC signaling
With completion.
Example 2
Assuming that it is 3 that OAM system DeNB cell initials uplink-downlink configuration modes, which are 1, Un subframes initial configuration mode, subframe weight
Configuration cycle T is 1s, and DeNB downlinks distribute to the maximum of T of relay node buffermax-eNodeBFor 3000000bytes, under RN
Row buffer maximum of Tmax-relayIt is 75% for 250990bytes, buffer aritical ratio α
1.DeNB passes through operation management maintainance (Operation Administration and Maintenance, OAM)
System obtains sub-frame configuration mode, and DeNB cell initials uplink-downlink configuration mode is that 1, Un subframes initial configuration mode is 3, subframe
It is 1s to reconfigure cycle T.
2.RN starts, and network is accessed using common UE attaching process, and it is 3 to obtain Un subframe initial configuration modes.
3. whether current time reaches the Un subframes adjustment period, subframe adjustment is carried out if reaching the subframe adjustment period and is sentenced
Certainly, otherwise terminate.
4. if the subframe adjustment period reaches, adjusting criterion according to Un subframes is adjusted, it is assumed that current period eNodeB
It is transferred to relaying downlink traffic T 'eNodeBFor 134986bytes, RN downlink traffics are reported by BSR is designated as 49, i.e.,
165989<T′relay<=204111, take N=5, preceding 5 sub- framing control period eNodeB and Relay downlink traffic variations to put down
Mean valueIt can be calculated
Then reduce Un downlink subframes
5.DeNode carries out Un subframe adjustment according to the 4th step frame court verdict, and Un sub-frame configurations are adjusted to 1 by 3,
And RN reconfiguration messages are sent to by RN by RRC signaling.
6.RN completes Un sub-frame configuration modes and changes, and subframe re-matching is set to 1, and notify eNodeB weights by RRC signaling
With completion.
A kind of embodiment of the reconfiguration system of relay sub-frame of the present invention
Simultaneously the present invention also provides a kind of reconfiguration system of relay sub-frame, the reconfiguration system include prediction module and
Judge that adjustment module, wherein prediction module are used to adjust period DeNB and RN portfolio situation of change, prediction according to top n subframe
DeNB the and RN portfolios in next subframe adjustment period；Judge that adjustment module was used for according to the next subframe adjustment period predicted
DeNB and the portfolio of Relay judge whether to need to increase subframe or reduce subframe, and weight is carried out to RN subframes according to result
Configuration.The specific implementation mode of each module is illustrated in the embodiment of method, and which is not described herein again.
The present invention adjusts period eNodeB and Relay downlink traffic situation of change according to top n subframe, predicts next son
The downlink traffic of framing control period eNodeB and Relay adjusts the DeNB and Relay in period according to the next subframe predicted
Portfolio judge whether to need to increase Un subframes or reduce Un subframes, and RN subframes are reconfigured according to result, when needing
When increasing subframe, increase according to number of sub-frames is chosen in the corresponding Un sub-frame configurations mode of DeNB cell uplink-downlink configuration modes
Sub-frame configuration mode, when need reduce subframe when, according to the corresponding sub-frame configuration sides Un of DeNB cell uplink-downlink configuration modes
The sub-frame configuration mode that number of sub-frames reduction is chosen in formula, adjusts the configuration mode of subframe according to portfolio to realize
Whole, the problem of avoiding the data congestion caused by sub-frame configuration is unreasonable, this method is simple and practicable, is easy to real in engineering
It is existing.
Claims (8)
1. a kind of method for reconfiguration of relay sub-frame, which is characterized in that the method for reconfiguration includes the following steps：
1) period DeNB and RN portfolio situation of change is adjusted according to top n subframe, predicts the DeNB in next subframe adjustment period
With RN portfolios；
2) judge whether to need to increase Un subframes according to the portfolio of the DeNB and Relay in the next subframe adjustment period predicted
Or Un subframes are reduced, and RN subframes are reconfigured according to result；
The criterion of increase subframe is in the step 2)：
Wherein, T 'eNodeBWith T 'relayThe respectively DeNB and RN downlink traffics of current period,WithPoint
Not Wei top n subframe adjust period DeNB and RN downlink traffic variation average value, Tmax-eNodeBBe DeNB be relay node
The buffer traffic peak of distribution, Tmax-relayIt is RN down buffer storage device traffic peaks, α is the aritical ratio of buffer, 0<
α<1。
2. the method for reconfiguration of relay sub-frame according to claim 1, which is characterized in that, will when needing to increase subframe
It is increased that current subframe mode is adjusted to number of sub-frames in the corresponding RN sub-frame configurations mode of DeNB cell uplink-downlink configuration modes
Sub-frame configuration mode；When needing to reduce subframe, current subframe mode is adjusted to DeNB cell uplink-downlink configuration modes and is corresponded to
RN sub-frame configuration modes in number of sub-frames reduction sub-frame configuration mode.
3. the method for reconfiguration of relay sub-frame according to claim 2, which is characterized in that predicted in the step 1)
The portfolio that the DeNB portfolios in next subframe adjustment period are current period DeNB adjusts period DeNB industry plus top n subframe
The average value of business amount variation, before the portfolio that the RN portfolios that the next subframe predicted adjusts the period are current period RN adds
The average value of N number of subframe adjustment period RN portfolio variation.
4. the method for reconfiguration of relay sub-frame according to claim 2, which is characterized in that described for downlink subframe
The criterion of reduction subframe is in step 2)：
Wherein, T 'eNodeBWith T 'relayThe respectively DeNB and RN downlink traffics of current period,WithPoint
Not Wei top n subframe adjust period DeNB and RN downlink traffic variation average value, Tmax-eNodeBBe DeNB be relay node
The buffer traffic peak of distribution, Tmax-relayIt is RN down buffer storage device traffic peaks, α is the aritical ratio of buffer, 0<
α<1。
5. the method for reconfiguration of relay sub-frame according to claim 1 or 4, which is characterized in that be in the step 2)
DeNB carries out RN subframe adjustment according to court verdict, and RN reconfiguration messages are sent to RN by RRC signaling, and son is completed in RN
Frame reconfigures, and notifies DeNB is re-matched to complete by RRC signaling.
6. a kind of reconfiguration system of relay sub-frame, which is characterized in that the reconfiguration system includes prediction module and judges to adjust
Module,
The prediction module is used to adjust period DeNB and RN portfolio situation of change according to top n subframe, predicts next son
DeNB the and RN portfolios in framing control period；
The judgement adjustment module is used to be sentenced according to the portfolio of the DeNB and Relay in the next subframe adjustment period predicted
It is disconnected whether to need to increase subframe or reduce subframe, and RN subframes are reconfigured according to result；
It is described to judge that adjustment module is for the criterion for increasing subframe for downlink subframe：
Wherein, T 'eNodeBWith T 'relayThe respectively DeNB and RN downlink traffics of current period,WithPoint
Not Wei top n subframe adjust period DeNB and RN downlink traffic variation average value, Tmax-eNodeBBe DeNB be relay node
The buffer traffic peak of distribution, Tmax-relayIt is RN down buffer storage device traffic peaks, α is the aritical ratio of buffer, 0
< α < 1.
7. the reconfiguration system of relay sub-frame according to claim 6, which is characterized in that the judgement adjustment module is being sentenced
Break to need increase subframe when, current subframe mode is adjusted to the corresponding RN sub-frame configurations of DeNB cell uplink-downlink configuration modes
The increased sub-frame configuration mode of number of sub-frames in mode；When judging to need to reduce subframe, current subframe mode is adjusted to
The sub-frame configuration mode of number of sub-frames reduction in the corresponding RN sub-frame configurations mode of DeNB cell uplink-downlink configuration modes.
8. the reconfiguration system of relay sub-frame according to claim 7, which is characterized in that described for downlink subframe
Judge that adjustment module is for the criterion for reducing subframe：
Wherein, T 'eNodeBWith T 'relayThe respectively DeNB and RN downlink traffics of current period,WithPoint
Not Wei top n subframe adjust period DeNB and RN downlink traffic variation average value, Tmax-eNodeBBe DeNB be relay node
The buffer traffic peak of distribution, Tmax-relayIt is RN down buffer storage device traffic peaks, α is the aritical ratio of buffer, 0
< α < 1.
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