CN103118390A - Business matching system and method for LTE-Advanced mobile relay access link and return link - Google Patents
Business matching system and method for LTE-Advanced mobile relay access link and return link Download PDFInfo
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- CN103118390A CN103118390A CN2013100541718A CN201310054171A CN103118390A CN 103118390 A CN103118390 A CN 103118390A CN 2013100541718 A CN2013100541718 A CN 2013100541718A CN 201310054171 A CN201310054171 A CN 201310054171A CN 103118390 A CN103118390 A CN 103118390A
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Abstract
The invention discloses a business matching system and method for an LTE-Advanced mobile relay access link and a return link. The system comprises a timing start module which is used for the business matching of the mobile relay MR_UE timing start access link and the return link, a business classification statistics module which is used for the classification statistics of MR_eNode B, UE(user Equipment)access number, operation queue and total volume of business of the mobile relay as well as determining the volume of business of the distributed return link resources, a resource statistics module which is used for the statistics of the return link resources of the MR_UE of the mobile relay, a business bypass module which is used for determining can-be-matched businesses of the access link and the return link, a business and resource matching module which is used for mapping the UE businesses which is available for the matching of the access link and the return link to transmission resources, and a matching feedback module which is used for sending matching feedback to the business classification statistics module and the resource statistics module. The business matching system and method for the LTE-Advanced mobile relay access link and the return link ensures the quality of QoS service of data transmission between UE and eNode B, after the return link is replaced.
Description
Technical field
The invention belongs to the mobile communication technology field, particularly relate to a kind of business matching system and the method for LTE-Advanced mobile relay access link and back haul link.
Background technology
LTE-Advanced is the evolution version of LTE, requires under the 100MHz bandwidth, and descending peak rate reaches 1Gbps, the up 500Mbps that reaches.Because LTE-Advanced uses the higher resource of frequency range, the problem such as cause cell coverage area to diminish and attenuation loss is serious.If the simple method that increases base station density that adopts solves the problems referred to above, can bring operator increases cost and disposes the problem that difficulty rises.For this reason, 3GPP has introduced relaying (relay) technology in LTE-Advanced.Introduce via node (RN, relay node) after, between subscriber equipment (UE) and base station (eNode B) with back haul link (Backhaul Link) and access link (Access Link) link (Direct Link) that replaces direct transferring, as shown in Figure 1.Wherein, depositing relatively independent separately access link between each UE and relaying, relaying and eNode B exist a shared back haul link.
In present relaying technique research, great majority also rest on the scene of fixing or static relaying.Along with the development of public transport is universal, people wish and can obtain the communication service of two-forty in the vehicles of high-speed motion, and this has just promoted the development of mobile relay.In mobile-relay system, exist strong mobility between relaying and eNode B, switch frequent between relaying and eNode B; And be relatively static or weak mobility between UE and relaying, the switching between UE and relaying is less, as shown in Figure 2.When a UE accesses eNode B by mobile relay, its access link is relatively stable; Back haul link is because frequent the replacing becomes unstable.
Mobile relay converges all business of its access UE by metastable access link, and the frequent replacing of back haul link is the principal element that affects the data transmission performance between UE and eNode B.In order to adapt to the frequent characteristics of changing of back haul link, the present invention proposes a kind of business matching system and the method for LTE-Advanced mobile relay access link and back haul link.
Summary of the invention
The invention provides business matching system and the method for a kind of LTE-Advanced mobile relay access link and back haul link, it has been guaranteed after changing back haul link, the QoS service quality of transfer of data between UE and eNode B.
According to the function of relaying, can resolve in logic two unit to trunking: one is the UE unit (being designated as MR_UE) for eNode B, and another is the eNode B unit (being designated as MR_eNode B) for UE.The present invention is the business coupling of studying LTE-Advanced mobile relay access link and back haul link on the basis of back haul link replacing adopting existing handoff technique to complete.A complete business coupling cycle is before after a back haul link switches, back haul link switches extremely next time.
The LTE-Advanced network can provide multiple business, and each business has QoS demand separately.Therefore, the business that UE uses need to be categorized as speech business, mobile video business, online game class business, downloading business etc.Every class business arranges a formation usually, and corresponding priority is set.The LTE-Advance mobile relay realizes that smoothly the precondition of the business coupling of access link and back haul link has two, one is to need the business demand of all UE of statistics access link in advance, and another is the channel resource that needs prior statistics back haul link to provide.For ease of expression and relatively, business demand and channel resource are all take message transmission rate as unit (for example bps).
The present invention is by the following technical solutions: the business matching system of LTE-Advanced mobile relay access link and back haul link comprises start by set date module, business statistic of classification module, resource statistics module, service distributing module, business and resource matched module, matching result feedback module.
Start by set date module: the business coupling that is used for mobile relay MR_UE start by set date access link and back haul link.The MR_UE unit of mobile relay regularly detects current eNode B numbering, and more whether the eNode B numbering that detects with the last time is consistent.As inconsistent, to assert to switch, will distribute the service queue of back haul link resource to empty (queue length T this moment
1=0) and the Resources allocation formation empties (S
1=0); Otherwise, do not empty.
Business statistic of classification module: be used for its UE quantity, service queue and total traffic (queue length T) that accesses of MR_eNode B statistic of classification of mobile relay, confirm to have distributed simultaneously traffic carrying capacity (the queue length T of back haul link resource
1).The business that UE uses can be categorized as speech business, mobile video business, online game class business, downloading business etc.Formation of every class business setting, and corresponding priority is set.Every kind of service queue is according to the principle of " first in first out ", can adopt the total traffic carrying capacity of pointer mark and distribute the traffic carrying capacity of back haul link resource.Total traffic carrying capacity (queue length T) deducts traffic carrying capacity (the queue length T that distributes the back haul link resource
1) be exactly traffic carrying capacity (the queue length T-T of unallocated back haul link resource
1).
Resource statistics module: the resource that is used for the MR_UE statistics back haul link of mobile relay.When switching (replacing back haul link) between relaying and eNode B, calculate total message transmission rate (S) that back haul link can provide for the UE business.Back haul link can deduct Resources allocation (S for total message transmission rate (S) that the UE business provides
1) be exactly the message transmission rate (S-S of unallocated resource back haul link
1).
Service distributing module: the business that is used for determining to allow to carry out access link and back haul link coupling.At first judge traffic carrying capacity (the queue length T-T of unallocated back haul link resource
1) whether less than the message transmission rate (S-S of unallocated resource back haul link
1).If set up, all business enter business and resource matched module.Otherwise, according to unallocated total resources, according to priority reaching order and determine to allow coupling UE business, the UE business that then is allowed to enters business and resource matched module.Certainly, the UE business (queue length (T-T that is not allowed to
1)-(S-S
1)) return to business statistic of classification formation.
Business and resource matched module: the UE business that is used for allowing to carry out access link and back haul link coupling is mapped to transfer resource.According to the method for LTE-Advanced time-division, the UE business that allows to carry out access link and back haul link coupling matches transmission time slot.
Matching result feedback module: be used for matching result is returned to business statistic of classification module and resource statistics module.UE business (the queue length T of this coupling
2) return to business statistic of classification module, count service queue (the queue length T that distributes the back haul link resource
1=T
1+ T
2); The channel resource that has mated the UE business returns to the resource statistics module, counts Resources allocation (S
1=S
1+ S
2).
The service matching method of LTE-Advanced mobile relay access link of the present invention and back haul link, its as follows:
1. the MR_UE unit of mobile relay regularly detects current eNode B numbering, and more whether the eNode B numbering that detects with the last time is consistent.As inconsistent, to assert to switch, will distribute the service queue of back haul link resource to empty (queue length T this moment
1=0) and the Resources allocation formation empties (S
1=0); Otherwise, do not empty.
2. its UE quantity that accesses, the formation of miscellaneous service (speech business, mobile video business, online game class business, downloading business etc.), total service queue (queue length T) are added up in the MR_eNode B unit of mobile relay.
The UE business that the not permission of 3. receiving according to feedback is mated, the information such as UE business of having mated, check the UE business of having mated of end of transmission of removing, confirm the business of distributing the back haul link resource of miscellaneous service and calculate and distributed total business volume (the queue length T of back haul link resource
1).Total traffic carrying capacity (queue length T) deducts traffic carrying capacity (the queue length T that distributes the back haul link resource
1) be exactly traffic carrying capacity (the queue length T-T of unallocated back haul link resource
1).
4. the UE business of receiving according to feedback and channel resource match information, confirm the UE business information of mating, check and confirm Resources allocation formation (S
1).Back haul link can deduct Resources allocation formation (S for total message transmission rate (S) that the UE business provides
1) be exactly the message transmission rate (S-S of unallocated resource back haul link
1).Wherein, length S determines when switching (replacing back haul link) between relaying and eNode B, also can remeasure and determine after switch.
5. judge traffic carrying capacity (the queue length T-T of unallocated back haul link resource
1) whether greater than the message transmission rate (S-S of unallocated resource back haul link
1).If set up, according to unallocated total resources, according to priority reach order and determine to allow coupling UE business.Namely distribute the UE business that allows coupling and the UE business that is not allowed to mate.
6. the UE business information feed back input business statistic of classification formation that is not allowed to.
7. the UE business that allows to carry out access link and back haul link coupling is mapped to transfer resource.Employing is according to the time-multiplexed method of LTE-Advanced, and the UE business that allows to carry out access link and back haul link coupling matches transmission time slot.Complete the business of coupling, can carry out transfer of data.
8. UE business (the queue length T of this coupling
2) information feed back input business statistic of classification module, count service queue (the queue length T that distributes the back haul link resource
1=T
1+ T
2); Mate the channel resource information feed back input resource statistics module of UE business, counted Resources allocation formation (S
1=S
1+ S
2).
The advantage of the system and method for the business coupling of LTE-Advanced mobile relay access link of the present invention and back haul link is: propose complete access link and the business matching scheme of back haul link, the business coupling cycle is before after a back haul link switches, back haul link switches extremely next time; And then the business of access link and back haul link is mated back haul link and is switched and carry out, when taking full advantage of back haul link and switching to the measurement result of channel; According to the priority level of business, can preferentially guarantee has the business of strict demand first to process to time delay and delay variation, has guaranteed the QoS service quality of business.
Description of drawings
Fig. 1 is the LTE-Advanced system construction drawing after the increase via node.
Fig. 2 is that the back haul link that mobile relay need to solve switches schematic diagram.
Fig. 3 is an application scenarios schematic diagram of mobile relay.
Fig. 4 is the service queue schematic diagram in concrete case study on implementation.
Fig. 5 is the flow chart of LTE-Advanced mobile relay access link and back haul link business coupling.
Fig. 6 is the system block diagram of LTE-Advanced mobile relay access link and back haul link business coupling.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing, embodiments of the invention are described in detail.
In mobile relay application scenarios as shown in Figure 3, with 7 residential quarters of identifier 1～7 sign, there is eNode B separately each residential quarter respectively.The bus that mobile relay is housed is current under the service of residential quarter 1, and the direction of motion can to arbitrary cells, be supposed 4 motions to the residential quarter here.With respect to mobile relay, this moment, the eNode B of residential quarter 1 was source eNode B, and the eNode B of residential quarter 4 is target eNode B.Relaying switches to target eNode B from source eNodeB, at first changes back haul link, and then the UE business with the relaying access matches back haul link from access link.
Suppose that this mobile relay has accessed a plurality of UE.Each UE may only use a business, may use simultaneously a plurality of business, also may be in idle condition by UE.The difference of business according to classification is divided into i formation and requires to mark corresponding priority according to different delay and delay variation, such as voice class service queue S1 priority is the 1(limit priority), mobile video business S2 priority is 2, mobile phone games class business S3 priority is 3, downloading business S4 priority is 4, etc.Illustrate as Fig. 4.Three pointer Li_0, Li_1 and Li_2 are adopted in each formation.Be the queue length of such business between Li_2 and Li_0, be designated as Li_2-Li_0; Distribute the queue length of back haul link resource between Li_1 and Li_0 for such business, be designated as Li_1-Li_0.So the queue length addition of all business can get service queue length (T) always, the queue length addition that distributes the back haul link resource of all business can get the traffic carrying capacity (T that distributes the back haul link resource always
1).
Referring to Fig. 5, the service matching method of LTE-Advanced mobile relay access link and back haul link, concrete execution in step is as follows:
1. the MR_UE unit of mobile relay regularly detects current eNode B numbering, and more whether the eNode B numbering that detects with the last time is consistent.As inconsistent, to assert to switch, will distribute the service queue of back haul link resource to empty (queue length T this moment
1=0) and the Resources allocation formation empties (S
1=0); Otherwise, do not empty.
2. its UE quantity that accesses, the formation of miscellaneous service (speech business, mobile video business, online game class business, downloading business etc.), total service queue (queue length T) are added up in the MR_eNode B unit of mobile relay.
The UE business that the not permission of 3. receiving according to feedback is mated, the information such as UE business of having mated, check the UE business of having mated of end of transmission of removing, confirm the business of distributing the back haul link resource of miscellaneous service and calculate and distributed total business volume (the queue length T of back haul link resource
1).Total traffic carrying capacity (queue length T) deducts traffic carrying capacity (the queue length T that distributes the back haul link resource
1) be exactly traffic carrying capacity (the queue length T-T of unallocated back haul link resource
1).
4. the UE business of receiving according to feedback and channel resource match information, confirm the UE business information of mating, check and confirm Resources allocation formation (S
1).Back haul link can deduct Resources allocation formation (S for total message transmission rate (S) that the UE business provides
1) be exactly the message transmission rate (S-S of unallocated resource back haul link
1).Wherein, length S determines when switching (replacing back haul link) between relaying and eNode B, also can remeasure and determine after switch.
5. judge traffic carrying capacity (the queue length T-T of unallocated back haul link resource
1) whether greater than the message transmission rate (S-S of unallocated resource back haul link
1).If set up, according to unallocated total resources, according to priority reach order and determine to allow coupling UE business.Namely distribute the UE business that allows coupling and the UE business that is not allowed to mate.
6. the UE business information feed back input business statistic of classification formation that is not allowed to.
7. the UE business that allows to carry out access link and back haul link coupling is mapped to transfer resource.Employing is according to the time-multiplexed method of LTE-Advanced, and the UE business that allows to carry out access link and back haul link coupling matches transmission time slot.Complete the business of coupling, can carry out transfer of data.
8. UE business (the queue length T of this coupling
2) information feed back input business statistic of classification module, count service queue (the queue length T that distributes the back haul link resource
1=T
1+ T
2); Mate the channel resource information feed back input resource statistics module of UE business, counted Resources allocation formation (S
1=S
1+ S
2).
Referring to Fig. 6, the business matching system of LTE-Advanced mobile relay access link of the present invention and back haul link comprises start by set date module, business statistic of classification module, resource statistics module, service distributing module, business and resource matched module, Real-time Feedback module.
Start by set date module: the business coupling that is used for mobile relay MR_UE start by set date access link and back haul link.The MR_UE unit of mobile relay regularly detects current eNode B numbering, and more whether the eNode B numbering that detects with the last time is consistent.As inconsistent, to assert to switch, will distribute the service queue of back haul link resource to empty (queue length T this moment
1=0) and the Resources allocation formation empties (S
1=0); Otherwise, do not empty.
Business statistic of classification module: be used for its UE quantity, service queue and total traffic (queue length T) that accesses of MR_eNode B statistic of classification of mobile relay, confirm to have distributed simultaneously traffic carrying capacity (the queue length T of back haul link resource
1).The business that UE uses can be categorized as speech business, mobile video business, online game class business, downloading business etc.Formation of every class business setting, and corresponding priority is set.Every kind of service queue is according to the principle of " first in first out ", can adopt the total traffic carrying capacity of pointer mark and distribute the traffic carrying capacity of back haul link resource.Total traffic carrying capacity (queue length T) deducts traffic carrying capacity (the queue length T that distributes the back haul link resource
1) be exactly traffic carrying capacity (the queue length T-T of unallocated back haul link resource
1).
Resource statistics module: the resource that is used for the MR_UE statistics back haul link of mobile relay.When switching (replacing back haul link) between relaying and eNode B, calculate total message transmission rate (S) that back haul link can provide for the UE business.Back haul link can deduct Resources allocation (S for total message transmission rate (S) that the UE business provides
1) be exactly the message transmission rate (S-S of unallocated resource back haul link
1).
Service distributing module: the business that is used for determining to allow to carry out access link and back haul link coupling.At first judge traffic carrying capacity (the queue length T-T of unallocated back haul link resource
1) whether less than the message transmission rate (S-S of unallocated resource back haul link
1).If set up, all business enter business and resource matched module.Otherwise, according to unallocated total resources, according to priority reaching order and determine to allow coupling UE business, the UE business that then is allowed to enters business and resource matched module.Certainly, the UE business (queue length (T-T that is not allowed to
1)-(S-S
1)) return to business statistic of classification formation.
Business and resource matched module: the UE business that is used for allowing to carry out access link and back haul link coupling is mapped to transfer resource.According to the method for LTE-Advanced time-division, the UE business that allows to carry out access link and back haul link coupling matches transmission time slot.
Matching result feedback module: be used for matching result is returned to business statistic of classification module and resource statistics module.UE business (the queue length T of this coupling
2) return to business statistic of classification module, count service queue (the queue length T that distributes the back haul link resource
1=T
1+ T
2); The channel resource that has mated the UE business returns to the resource statistics module, counts Resources allocation (S
1=S
1+ S
2).
Above preferred embodiment and principle to patent of the present invention has been described in detail.For those of ordinary skill in the art, the thought according to patent of the present invention provides will change on embodiment, and these changes also should be considered as the protection range of patent of the present invention.
Claims (2)
1.LTE-Advanced the business matching system of mobile relay access link and back haul link is characterized in that comprising:
Clocked flip module: the business coupling that is used for mobile relay MR_UE start by set date access link and back haul link;
Business statistic of classification module: be used for its UE quantity, service queue and total traffic that accesses of MR_eNode B statistic of classification of mobile relay, confirm to have distributed simultaneously the traffic carrying capacity of back haul link resource;
Resource statistics module: the resource that is used for the MR_UE statistics back haul link of mobile relay;
Service distributing module: the business that is used for determining to allow to carry out access link and back haul link coupling;
Business and resource matched module: the UE business that is used for allowing to carry out access link and back haul link coupling is mapped to transfer resource;
Matching result feedback module: be used for matching result is returned to business statistic of classification module and resource statistics module.
2.LTE-Advanced the service matching method of mobile relay access link and back haul link is characterized in that as follows:
1. the MR_UE unit of mobile relay regularly detects current eNode B numbering, and more whether the eNode B numbering that detects with the last time is consistent; If inconsistent, assert and changed back haul link, will distribute this moment the service queue of back haul link resource to empty and the Resources allocation formation empty; Otherwise, do not empty;
2. its UE quantity that accesses, the formation of miscellaneous service, total service queue are added up in the MR_eNode B unit of mobile relay;
The UE business that the not permission of 3. receiving according to feedback is mated, the information such as UE business of having mated, check the UE business of having mated of end of transmission of removing, confirm the business of distributing the back haul link resource of miscellaneous service and calculate the total business volume of having distributed the back haul link resource; Be exactly total traffic carrying capacity deduct the traffic carrying capacity of the unallocated back haul link resource of the traffic carrying capacity of distributing the back haul link resource;
4. the UE business of receiving according to feedback and channel resource match information, confirm the UE business information of mating, check and confirm Resources allocation formation; Be exactly total back haul link can for the UE business provide message transmission rate deduct the message transmission rate of the unallocated resource back haul link of Resources allocation formation;
Whether the traffic carrying capacity that 5. judges unallocated back haul link resource is greater than the message transmission rate of unallocated resource back haul link; If set up, according to unallocated total resources, according to priority reach order and determine to allow coupling UE business; Namely distribute the UE business that allows coupling and the UE business that is not allowed to mate;
6. the UE business information feed back input business statistic of classification formation that is not allowed to;
7. the UE business that allows to carry out access link and back haul link coupling is mapped to transfer resource; Employing is according to the method for LTE-Advanced time-division, and the UE business that allows to carry out access link and back haul link coupling matches transmission time slot; Complete the business of coupling, can carry out transfer of data;
8. the UE business information feed back input business statistic of classification module of this coupling, count the service queue that distributes the back haul link resource; Mate the channel resource information feed back input resource statistics module of UE business, counted Resources allocation formation.
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| CN201310054171.8A CN103118390B (en) | 2013-02-20 | 2013-02-20 | Business matching system and method for LTE-Advanced mobile relay access link and return link |
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|---|---|---|---|
| CN201310054171.8A CN103118390B (en) | 2013-02-20 | 2013-02-20 | Business matching system and method for LTE-Advanced mobile relay access link and return link |
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| CN103118390B CN103118390B (en) | 2015-06-17 |
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Cited By (3)
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| CN103354653A (en) * | 2013-07-17 | 2013-10-16 | 三维通信股份有限公司 | Switching method of LTE-Advanced mobile relay |
| CN104394596A (en) * | 2014-12-22 | 2015-03-04 | 哈尔滨工业大学 | Upstream resource distribution method capable of considering both throughput capacity and fairness in TD-LTE-Advanced (Time Division-Long Term Evolution-Advanced) relay system |
| CN107005973A (en) * | 2014-12-05 | 2017-08-01 | 瑞典爱立信有限公司 | Perform the adaptive method of link and communication equipment |
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| CN102932859A (en) * | 2012-09-28 | 2013-02-13 | 三维通信股份有限公司 | System and method for switching long term evolution (LTE)-advanced mobile relay (MR) and eNode B |
| CN102932830A (en) * | 2012-10-17 | 2013-02-13 | 三维通信股份有限公司 | Communication system and communication method for reducing channel measurement position deviation between mobile relays and eNode B by using LTE-Advanced (Long Term Evolution Advanced) |
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| CN103354653A (en) * | 2013-07-17 | 2013-10-16 | 三维通信股份有限公司 | Switching method of LTE-Advanced mobile relay |
| CN103354653B (en) * | 2013-07-17 | 2015-12-02 | 三维通信股份有限公司 | A kind of changing method of LTE-Advanced mobile relay |
| CN107005973A (en) * | 2014-12-05 | 2017-08-01 | 瑞典爱立信有限公司 | Perform the adaptive method of link and communication equipment |
| CN104394596A (en) * | 2014-12-22 | 2015-03-04 | 哈尔滨工业大学 | Upstream resource distribution method capable of considering both throughput capacity and fairness in TD-LTE-Advanced (Time Division-Long Term Evolution-Advanced) relay system |
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|---|---|
| CN103118390B (en) | 2015-06-17 |
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Granted publication date: 20150617 Termination date: 20200220 |