CN101640947A - Affiliation method of relay system terminal - Google Patents
Affiliation method of relay system terminal Download PDFInfo
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- CN101640947A CN101640947A CN 200910055923 CN200910055923A CN101640947A CN 101640947 A CN101640947 A CN 101640947A CN 200910055923 CN200910055923 CN 200910055923 CN 200910055923 A CN200910055923 A CN 200910055923A CN 101640947 A CN101640947 A CN 101640947A
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Abstract
The invention discloses an affiliation method of a relay system terminal, comprising the following steps: 1. a relay station RN measures a SRS signal transmitted from a terminal UE so as to obtain a measurement report; 2. the relay station RN prescreens the measurement report and feeds back the measurement report passing the screen to a base station eNB; 3. according to feedback measurement report, the base station eNB finally judges the terminal UE affiliation and notifies the UE ID of the subordinate terminal UE thereof to the relay station RN. The invention utilizes the SRS signal to measure the channel and obtain quantification channel quality information, which is convenient to quantitatively describe UE-to-RN link channel quality and brings convenience for operators to make a threshold for the terminal UE to belong to or separate from the relay station RN according to business requirements, so that channel environment from the terminal to the relay station is more accurately expressed.
Description
Technical field
The invention belongs to communication technical field, relate to a kind of affiliation method of relay system terminal.
Background technology
As current communications field development potentiality maximum, the mobile communication technology that market prospects are the widest has welcome the 3G epoch.But in order to solve frequency spectrum resource anxiety, power system capacity is limited, user's request is growing problem, International Telecommunication Association's tissue has started the technology collecting work of the 4th IMT-Advanced of third-generation mobile communication system (ITU) in February, 2008.In order to respond the technology collection of ITU-R IMT-Advanced (ITU-Radio communicationssector International Mobile Telecommunications-Advanced), also be unwilling to remain out of the limelight as the 3GPP (3th Generation Partnershipproject) that had once formulated 3G UMTS in the industry cycle with strongest influence power (Universal MobileTelecommunications System) technical standard, launched LTE-Advanced (Long TermEvolution-Advanced) standard process in March, 2008.A characteristic of LTE-A system be in system, introduced relay station (Relay station, RS/RN).The introducing of relay station has improved covering quality, the coverage of signal and power system capacity to a certain extent.
In the technical discussion of 3GPP, now defined two types relaying: Type I Relay (Class1 relaying) and Type II Relay (type 2 relayings).Wherein Type II Relay is because it disposes flexible, characteristics such as network topology structure influence is little are received much attention, but for Type II Relay, because the 3GPP technical discussion has been determined its descending common pilot signal (Common ReferenceSignal that does not send oneself, CRS), cause it to be unable to estimate the channel quality information of descending RN-to-UE (being relayed to terminal) link, therefore can't define the UE (Remote UE) that UE (Macro UE) that certain UE is under the jurisdiction of the base station still is under the jurisdiction of relaying, follow-up research work brings a lot of uncertain factors and potential problem to Type II Relay for this.
In Type II Relay on the attaching problem of UE, neither one total solution also, only Waduven once set forth their the solution thinking about the UE attaching problem in the 57th meeting of 3GPP: utilize and mix automatic repeat requests (Hybrid Automatic Repeat request, HARQ) retransmission rate (number of times) defines certain threshold value, if HARQ retransmission rate (number of times) is on this threshold value, just retransmission probability is greater than threshold value, this UE is considered to needs and obtains the RN help of cooperating, and belongs to Remote UE; If below the threshold value, just retransmission rate is lower than threshold value to HARQ retransmission rate (number of times) at this, this UE do not need to be considered to the help of RN, belong to Macro UE.Such solution exists following open defect and deficiency at least at 2:
1, the HARQ height that retransmits frequency depends on choosing of MCS in the link circuit self-adapting (modulation coding mode) form to a great extent, and the high frequency that retransmits might not be represented that the link-quality of UE-to-eNB (terminal to base station link) is very poor and needs RN to help.
2, whether determine the attaching problem of UE with the height of HARQ re-transmission frequency, can only solve UE needs RN help and can not solve the problem which RN UE needs help.
Summary of the invention
Technical problem to be solved by this invention is: the affiliation method that a kind of relay system terminal is provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme.
A kind of affiliation method of relay system terminal may further comprise the steps:
Step 3, base station eNB is made the conclusive judgement that belongs to about terminal UE according to feedback measurement report, and the UE ID of its subordinate terminal of notice relay station RN UE.
As a preferred embodiment of the present invention, the listening sweep implementation of described method may further comprise the steps:
Steps A 3, relay station RN carries out prescreen to each terminal to the channel quality information of relay station link according to criterion B, and terminal that then will be by prescreen is to the channel quality information of relay station link, perhaps together with its UE ID, form measurement report, feed back to base station eNB;
As another kind of preferred version of the present invention, the high-rise configuration information of the SRS of described terminal UE comprises the transmission bandwidth, time-frequency position, and transmission cycle.
As another preferred version of the present invention, described criterion A is: the link-quality of terminal to base station does not satisfy the requirement of the service quality QoS of this terminal.
As another preferred version of the present invention, described prescreen is to determine according to the ability of relay station RN self service terminal UE.
As another preferred version of the present invention, the active mode search implementation of described method may further comprise the steps:
Step B1, the base station eNB indication relay station RN flow process of starting working, and relay station RN feeds back employed temporal frequency Resource Block;
Step B2, relay station RN is according to the cell-specific information of the SRS configuration of all user terminal UE in the sub-district, to the SRS signal that might occur carry out blind check, catch the SRS signal of terminal UE in the relay station RN coverage, record the link quality information of terminal to relay station;
Step B3, relay station RN carries out prescreen to the terminal that records to the link quality information of relay station according to criterion B, terminal that will be by prescreen to the link quality information of relay station with and corresponding SRS characteristic information, form measurement report, feed back to base station eNB;
Step B4, base station eNB obtains the UE ID of relevant terminal UE according to the SRS characteristic information of relay station RN feedback, and comprehensively determines the UE ID of the terminal UE that needs relay station RN helps according to criterion C;
Step B5, base station eNB is notified the UE ID of each its subordinate terminal of relay station RN UE.
Beneficial effect of the present invention is: the invention solves the problem whether terminal UE needs relay station RN cooperation, also solved the problem which relay station RN is terminal UE specifically belong to simultaneously; The present invention utilizes the SRS signal to carry out channel measurement, obtain the channel quality information of quantification, convenient quantitative UE-to-RN link channel quality is described, and be convenient to operator and formulate the threshold value that terminal UE belongs to relay station RN or breaks away from relay station RN, showed the channel circumstance of terminal more accurately to relay station according to its business demand.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is listening sweep model process figure;
Fig. 2 is active mode search model process figure.
Embodiment
The present invention is towards the 4th third-generation mobile communication technology.The present invention is directed to existing Type II Relay (type 2 relayings) system and can't propose solution lacking the attaching problem of finishing UE (terminal) under the scene of downlink reference signal.This invention can be applied to LTE-A (Long Term Evolution-Advanced, LTE-A) Type II Relay (type 2 relayings) system.
Because the UE attaching problem all is unavoidable technical barrier for all possible Type II Relay operative scenario among the Type II Relay, we have proposed to utilize SRS (Sounding ReferenceSignal for this reason, SRS) reference signal solves the technical scheme of UE attaching problem, concrete technical scheme is: we at first utilize the uplink SRS reference signal to finish the channel quality measurement of UE-to-RN link (terminal is to repeated link), solve the attaching problem of UE then according to channel quality information.
The affiliation method of a kind of relay system terminal provided by the invention mainly may further comprise the steps:
Step 3, base station eNB is made the conclusive judgement that belongs to about terminal UE according to feedback measurement report, and the UE ID of its subordinate terminal of notice relay station RN UE.
Embodiment one
What present embodiment was described is the listening sweep implementation of the method for the invention, and workflow may further comprise the steps as shown in Figure 1:
Steps A 3, relay station RN carries out prescreen to each terminal to the channel quality information of relay station link according to criterion B, and terminal that then will be by prescreen is to the channel quality information of relay station link, perhaps together with its UE ID, form measurement report, feed back to base station eNB;
Wherein, the high-rise configuration information of the SRS of described terminal UE comprises the transmission bandwidth, time-frequency position, and transmission cycle.Described criterion A is: the link-quality of terminal to base station does not satisfy the requirement of the service quality QoS of this terminal.Described prescreen is to determine according to the ability of relay station RN self service terminal UE.
The detailed process of present embodiment is as follows:
1, eNB is according to criterion A, inferred some terminal UE s that may need RN to help in the sub-district, and send to relay station RNs, and inform the employed temporal frequency Resource Block of RN flow process 3 feedbacks with the UE information specific of the high-rise configuration of its SRS or together with its UE ID (UE Identifier terminal indications).
Illustrate: wherein the high-rise configuration information of the SRS of UEs comprises that SRS sends bandwidth, sends the position, and the transmission cycle etc. are by the high-rise semi-static configuration of eNB.It is multiple that eNB has inferred that the criterion of " UE that may need RN to help " in the sub-district has, and wherein a kind of can be the qos requirement that the link-quality of UE-to-eNB does not satisfy this UE.
2, RN monitors the SRS that UE sends according to the high-rise configuration information of the SRS of eNB notice, obtains UE-to-RN link channel quality information.
3, RN feeds back to the UE-to-RN link channel quality information of each UEs of eNB.RN can carry out prescreen to reduce the feedback data amount to the UE-to-RN link channel quality information of each UE according to criterion B.
4, the UE-to-RN channel quality information that feeds back of comprehensive each RN of eNB is made last judgement according to criterion C, the attaching problem of decision UEs.
5 and notify the UE ID of its subordinate UE of each RNs.
Embodiment two
What present embodiment was described is the active mode search implementation of the method for the invention, and workflow may further comprise the steps as shown in Figure 2:
Step B1, the base station eNB indication relay station RN flow process of starting working, and relay station RN feeds back employed temporal frequency Resource Block;
Step B2, relay station RN is according to the cell-specific information of the SRS configuration of all user terminal UE in the sub-district, to the SRS signal that might occur carry out blind check, catch the SRS signal of terminal UE in the relay station RN coverage, record the link quality information of terminal to relay station;
Step B3, relay station RN carries out prescreen to the terminal that records to the link quality information of relay station according to criterion B, terminal that will be by prescreen to the link quality information of relay station with and corresponding SRS characteristic information, form measurement report, feed back to base station eNB;
Step B4, base station eNB obtains the UE ID of relevant terminal UE according to the SRS characteristic information of relay station RN feedback, and comprehensively determines the UE ID of the terminal UE that needs relay station RN helps according to criterion C;
Step B5, base station eNB is notified the UE ID of each its subordinate terminal of relay station RN UE.
The detailed process of present embodiment is as follows:
1, eNB indicates each RN flow process of starting working, and relay station RN feeds back employed temporal frequency Resource Block.
2, each relay station RN is according to the cell specific information (RNs obtains cell specific (sub-district is specific) SRS configuration information by broadcast channel) of all user SRS configurations in the sub-district, to the SRS signal that might occur carry out blind check, catch the SRS signal of UE in its coverage, record the UE-to-RN link quality information.
Illustrate: because each RN is without any the UE specific configuration information about the SRS of UE, therefore, can only to SRS might appear and signal carry out blind check, RN can't know certain SRS that records by which UE is sent.
3, RN is through prescreen, and feedback is given eNB by the UE-to-RN channel quality information of prescreen and corresponding SRS characteristic information.
Illustrate:, just can't learn that also certain SRS is which UE sends, so can only feed back corresponding SRS characteristic information because RN does not know the UE specific configuration information of SRS.For example RN finds a SRS signal, records the channel quality information of certain UE to RN, then feeds back characteristic information such as the cycle of this SRS, and time-frequency position and corresponding channel quality information are given eNB.
4, eNB obtains corresponding UE ID according to the SRS characteristic information of each RN feedback, and comprehensively determines the UE ID that certain RN of needs helps according to certain criterion C.
Illustrate: the configuration information that sends SRS owing to UE is up is that the high-rise configuration of eNB comes, and therefore, for the SRS characteristic information of RN feedback, eNB can find corresponding UE ID.ENB is according to business need, and the communication quality information of each subordinate UEs, and QoS (service quality), the UE ID that decision needs certain RN to help.
5, eNB notifies the UE ID of its subordinate UEs of each RN.
The present invention is applicable to LTE-A Type II Relay system, has following advantage with respect to prior art:
1, utilize the SRS signal to carry out channel measurement, obtain the channel quality information of quantification, convenient quantitative UE-to-RN link channel quality is described, and be convenient to the threshold value that operator belongs to RN or breaks away from RN according to its business demand formulation UE.
2, channel quality information has showed the UE-to-RN channel circumstance more accurately with respect to the retransmission rate of HARQ.
3, solve the problem whether UE needs RN to help, also solved the problem which RN UE specifically needs help simultaneously.
Here description of the invention and application is illustrative, is not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of disclosed embodiment and change are possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present invention or substantive characteristics, and the present invention can be with other forms, structure, layout, ratio, and realize with other elements, material and parts.
Claims (6)
1. the affiliation method of a relay system terminal is characterized in that, said method comprising the steps of:
Step 1, relay station RN measures the SRS signal that terminal UE is sent, and draws measurement report;
Step 2, relay station RN carries out prescreen to described measurement report, will feed back to base station eNB by the measurement report of screening;
Step 3, base station eNB is made the conclusive judgement that belongs to about terminal UE according to feedback measurement report, and the UE ID of its subordinate terminal of notice relay station RN UE.
2. the affiliation method of relay system terminal according to claim 1 is characterized in that, the listening sweep implementation of described method may further comprise the steps:
Steps A 1, base station eNB is inferred according to criterion A and in the sub-district terminal UE that some may needs relay station RN helps, and with the high-rise configuration information of the SRS of these terminal UE or and UE ID send to relay station RN together, and inform that relay station RN feeds back employed temporal frequency Resource Block;
Steps A 2, relay station RN monitors the SRS signal that terminal UE is sent according to the high-rise configuration information of the SRS of base station eNB notice, obtains the channel quality information of terminal to the relay station link;
Steps A 3, relay station RN carries out prescreen to each terminal to the channel quality information of relay station link according to criterion B, and terminal that then will be by prescreen is to the channel quality information of relay station link, perhaps together with its UE ID, form measurement report, feed back to base station eNB;
Steps A 4, the terminal that comprehensive each relay station of base station eNB feeds back is made last judgement to the channel quality information of relay station link according to criterion C, determines the ownership of terminal UE;
Steps A 5, base station eNB are notified the UE ID of each its subordinate terminal of relay station RN UE.
3. the affiliation method of relay system terminal according to claim 2 is characterized in that: the high-rise configuration information of the SRS of described terminal UE comprises the transmission bandwidth, time-frequency position, and transmission cycle.
4. the affiliation method of relay system terminal according to claim 1 is characterized in that, described criterion A is: the link-quality of terminal to base station does not satisfy the requirement of the service quality QoS of this terminal.
5. the affiliation method of relay system terminal according to claim 1 is characterized in that: described prescreen is to determine according to the ability of relay station RN self service terminal UE.
6. the affiliation method of relay system terminal according to claim 1 is characterized in that, the active mode search implementation of described method may further comprise the steps:
Step B1, the base station eNB indication relay station RN flow process of starting working, and relay station RN feeds back employed temporal frequency Resource Block;
Step B2, relay station RN is according to the cell-specific information of the SRS configuration of all user terminal UE in the sub-district, to the SRS signal that might occur carry out blind check, catch the SRS signal of terminal UE in the relay station RN coverage, record the link quality information of terminal to relay station;
Step B3, relay station RN carries out prescreen to the terminal that records to the link quality information of relay station according to criterion B, terminal that will be by prescreen to the link quality information of relay station with and corresponding SRS characteristic information, form measurement report, feed back to base station eNB;
Step B4, base station eNB obtains the UE ID of relevant terminal UE according to the SRS characteristic information of relay station RN feedback, and comprehensively determines the UE ID of the terminal UE that needs relay station RN helps according to criterion C;
Step B5, base station eNB is notified the UE ID of each its subordinate terminal of relay station RN UE.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102281518A (en) * | 2010-06-12 | 2011-12-14 | 普天信息技术研究院有限公司 | Resource scheduling/authorizing method |
| WO2012028097A1 (en) * | 2010-09-03 | 2012-03-08 | 电信科学技术研究院 | Method for judging spatial affiliation of user equipment and base station therefor |
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2009
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102281518A (en) * | 2010-06-12 | 2011-12-14 | 普天信息技术研究院有限公司 | Resource scheduling/authorizing method |
| WO2011153864A1 (en) * | 2010-06-12 | 2011-12-15 | 普天信息技术研究院有限公司 | Method for resource scheduling/authorization |
| WO2012028097A1 (en) * | 2010-09-03 | 2012-03-08 | 电信科学技术研究院 | Method for judging spatial affiliation of user equipment and base station therefor |
| CN102387488A (en) * | 2010-09-03 | 2012-03-21 | 电信科学技术研究院 | Method for judging affiliation of terminal space and base station |
| CN102387488B (en) * | 2010-09-03 | 2015-04-15 | 电信科学技术研究院 | Method for judging affiliation of terminal space and base station |
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Open date: 20100203 |