CN102137498A - Method and device for allocating resources in relay system - Google Patents
Method and device for allocating resources in relay system Download PDFInfo
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- CN102137498A CN102137498A CN2010101005911A CN201010100591A CN102137498A CN 102137498 A CN102137498 A CN 102137498A CN 2010101005911 A CN2010101005911 A CN 2010101005911A CN 201010100591 A CN201010100591 A CN 201010100591A CN 102137498 A CN102137498 A CN 102137498A
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Abstract
The invention discloses a method for allocating resources in a relay system. The method is used for realizing semi-static allocation of backhaul resources and access resources. The method comprises the following steps: comparing the absolute value of the difference value of the first resource use ratio of a backhaul link and the second resource use ratio of an access link with the preset difference value threshold; if the absolute value is not more than the preset difference value threshold, allocating resources for the backhaul link and the access link according to the resource allocation parameter values respectively preset for the backhaul link and the access link; and if the absolute value is more than the preset difference value threshold, increasing the resource allocation parameter value of the link corresponding to the bigger resource user ratio and decreasing the resource allocation parameter value of the link corresponding to the smaller resource user ratio according to the comparison result of the first and second resource use ratios and allocating resources for the backhaul link and the access link according to the adjusted resource allocation parameter values. The invention also discloses a device for realizing the method.
Description
Technical field
The present invention relates to the communications field, particularly relate to resource allocation methods and device in the relay system.
Background technology
Relaying (Relay) technology is a key property of Long Term Evolution (LTE-A) system of upgrading, and its introducing can improve power system capacity or covering.For Relay in the band, after Relay introduced, interface-free resources was divided into backhaul (Backhaul) resource and access (Access) resource two parts: on the Backhaul resource, macro base station is Relay node transmission data; On the Access resource, Relay node and the macro base station user that scheduling simultaneously belongs to separately on identical or different frequency resources.Macro base station is by direct (Direct) link and the grand telex network that directly belongs under it.
Prior art has the method for fixing resource allocation and the resource allocation methods of pure dynamic dispatching about the resource allocation algorithm of Backhaul.So-called fixing resource allocation algorithm is meant: interface-free resources is certain, and Backhaul resource and Access resource adopt the method for salary distribution of unified fixed proportion in whole system.Under the mode of this fixed allocation resource, if too much to the resource that Backhaul distributes, can cause distributing to a resource shrinkage of Access link on the one hand, cause the wasting of resources, on the other hand, when descending, also can cause the data volume in the Relay buffer memory too much to be overflowed.If less, can cause Relay user when descending because the reason speed of Backhaul link can not improve for the resource that Backhaul distributes; When up, can cause the data in the RelayAccess link buffer memory can not be uploaded to the base station timely and cause data to overflow.
Pure dynamic resource allocation is meant: as all will calculating and upgrade according to the real-time resource utilization to Backhaul link and Access link such as channel condition, buffer memory size etc. in each TTI, and take this as a foundation real-time resource of distributing for Backhaul and Access in the unit interval.Though the shortcoming that pure Dynamic Resource Allocation for Multimedia can avoid the fixed resource allocation algorithm to exist, the implementation complexity height, overhead is bigger.
Summary of the invention
The embodiment of the invention provides resource allocation methods and the device in a kind of relay system, be used to realize semi-static distribution Backhaul resource and Access resource, can reduce the wasting of resources and data are overflowed with respect to the mode of solid-state resource allocation, can simplify implementation complexity with respect to pure dynamic resource distribution mode.
Resource allocation methods in a kind of relay system may further comprise the steps:
The absolute value of the difference of second resource utilization of first resource utilization of Backhaul link and Access link and default difference threshold value are compared;
When being not more than default difference threshold value, be Backhaul link and Access link assignment resource according to Backhaul link and the corresponding respectively resource allocation parameters value of Access link;
When greater than default difference threshold value, size according to first resource utilization and second resource utilization, improve wherein resource allocation parameters value than large resource utilance respective links, reducing the resource allocation parameters value of wherein less resource utilization respective links, is Backhaul link and Access link assignment resource according to adjusted resource allocation parameters value.
A kind of base station comprises:
Control module is used for first resource utilization of backhaul Backhaul link is compared with the absolute value of the difference of second resource utilization that inserts the Access link and default difference threshold value;
The link circuit resource distribution module, be used for when being not more than default difference threshold value, according to being Backhaul link and Access link assignment resource for the default respectively resource allocation parameters value of Backhaul link and Access link, when greater than default difference threshold value, size according to first resource utilization and second resource utilization, improve wherein resource allocation parameters value than large resource utilance respective links, reducing the resource allocation parameters value of wherein less resource utilization respective links, is Backhaul link and Access link assignment resource according to adjusted resource allocation parameters value.
The embodiment of the invention judges that whether the absolute value of difference of second resource utilization of first resource utilization of Backhaul link and Access link is greater than default difference threshold value, if greater than, then adjust the resource allocation parameters value of link and according to adjusted resource allocation parameters value Resources allocation, otherwise according to current resource allocation parameters value Resources allocation, realized that semi-static mode is Backhaul link and Access link assignment resource, both solve the dumb variety of problems that causes of fixed allocation, solved the problems such as complexity height of pure dynamic assignment again.
Description of drawings
Fig. 1 is the primary structure figure of base station in the embodiment of the invention;
Fig. 2 is the detailed structure view of base station in the embodiment of the invention;
Fig. 3 is the structure chart of communication system in the embodiment of the invention;
Fig. 4 is the main method flow chart of resource allocation in the embodiment of the invention;
Fig. 5 is according to the method flow diagram of resource utilization allocation of downlink resource in the embodiment of the invention;
Fig. 6 is according to the method flow diagram of data in buffer amount allocation of downlink resource in the embodiment of the invention;
Fig. 7 is the method flow diagram that distributes ascending resource in the embodiment of the invention according to resource utilization;
Fig. 8 is the method flow diagram that distributes ascending resource in the embodiment of the invention according to the data in buffer amount.
Embodiment
It is Backhaul link and Access link assignment resource that the embodiment of the invention adopts semi-static mode, has both solved the dumb variety of problems that causes of fixed allocation, has solved the problems such as complexity height of pure dynamic assignment again.
Referring to Fig. 1, the base station in the present embodiment comprises: control module 101 and link circuit resource distribution module 102.This base station can be specially evolution base station (eNB) etc.
Link circuit resource distribution module 102 is used for when being not more than default difference threshold value, promptly | u
1-u
2|≤Δ, the resource allocation parameters value corresponding respectively according to Backhaul link and Access link is Backhaul link and Access link assignment resource, when greater than default difference threshold value, promptly | u
1-u
2|＞Δ, size according to first resource utilization and second resource utilization, improve wherein resource allocation parameters value than large resource utilance respective links, reducing the resource allocation parameters value of wherein less resource utilization respective links, is Backhaul link and Access link assignment resource according to adjusted resource allocation parameters value.| u
1-u
2| under the situation of＞Δ, work as u
1＞u
2The time, illustrate that Backhaul is resource-constrained, be adjusted to the resource of Backhaul link assignment on the needs, be equivalent to be adjusted into the resource of Access link assignment downwards.Work as u
1＜u
2The time, illustrate that the Backhaul resource is too much, need to be adjusted to down the resource of Backhaul link assignment, be equivalent to adjust upward resource into the Access link assignment.The amplitude of adjusting is Δ t, and the size of definite and business model, channel condition, the interface-free resources of Δ t etc. are relevant.As: than higher business, the value of adjustment amount t Δ can be bigger to delay requirement; The business smaller to delay requirement, the value of the adjustment amount Δ t that it is each can be smaller.Eat dishes without rice or wine total resources when bigger, and the value of adjustment amount Δ t also can be greatly; Otherwise the value of each adjustment amount Δ t can be smaller.If two link channel condition differences of Backhaul and Access are bigger, the value of Δ t can be bigger; If two the channel condition difference of link is less, the value of adjustment amount Δ t can be smaller.Certainly, the size of concrete adjustment amount Δ t also will obtain according to concrete simulation result or empirical value.
The resource allocation parameters value y that is initially the Backhaul link assignment is
The resource allocation parameters value x that is initially the Access link assignment is
Wherein T is the interface-free resources total amount, f
1Be the spectrum efficiency of Access link, f
2Spectrum efficiency for the Backhaul link.f
1And f
2Can obtain by emulation experiment, or rule of thumb set.
The base station also comprises initial value module 103, referring to shown in Figure 2.Initial value module 103 is used to obtain the resource allocation parameters value y of Backhaul link and Access link and the initial value y of x
0And x
0Concrete, need be forwarded to subscriber equipment because the base station sends to the data of Relay equipment, so initial value module 103 is established f
1* x
0=f
2* y
0, and x
0+ y
0=T, and then have
With
The base station may be Backhaul link and Access link assignment ascending resource or downlink resource, when needs distribute ascending resource, first resource utilization of Backhaul link is first resource utilization of up Backhaul link, second resource utilization of Access link is second resource utilization of up Access link, for the resource of Backhaul link and Access link assignment is the ascending resource of Backhaul link and Access link.When needs allocation of downlink resource, first resource utilization of Backhaul link is first resource utilization of descending Backhaul link, second resource utilization of Access link is second resource utilization of descending Access link, for the resource of Backhaul link and Access link assignment is the downlink resource of Backhaul link and Access link.
In order to reduce the adjustment number of times of resource allocation parameters value, save the resource of base station, when needs distribute ascending resource and during greater than default difference threshold value, control module 101 also is used to judge the first resource utilization u
1Whether greater than the first default resource utilization threshold value Δ
1And the second resource utilization u
2Whether greater than the second default resource utilization threshold value Δ
2Link circuit resource distribution module 102 also is used for when all being not more than, i.e. u
1≤ Δ
1﹠amp; ﹠amp; u
2≤ Δ
2The time, according to being Backhaul link and Access link assignment resource for the default respectively resource allocation parameters value of Backhaul link and Access link, otherwise, determine resource utilization link corresponding bigger in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and the resource allocation parameters value of another link of reduction.Δ
1And Δ
2Be respectively the minimum threshold of Backhaul link and Access link circuit resource utilance, determining of this threshold value is relevant with type of service, delay requirement etc.As: full buffer memory (full buffer) business, Δ
1And Δ
2Value can establish higherly, for the less business of traffic carrying capacity, as VoIP business, Δ
1And Δ
2Value low relatively.
Perhaps, distribute ascending resource and during greater than default difference threshold value, control module 101 also is used to judge data in buffer amount Buffer on the Relay Access link when needs
RelayWhether greater than the first default buffer threshold value Δ
4Link circuit resource distribution module 102 also be used for greater than the time, i.e. Buffer
Relay＞Δ
4The time, then determine bigger resource utilization link corresponding in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and reduce the resource allocation parameters value of another link, when being not more than, i.e. Buffer
Relay≤ Δ
4The time, according to being Backhaul link and Access link assignment resource for the default respectively resource allocation parameters value of Backhaul link and Access link.Wherein, Δ
4Be the minimum threshold of Relay Access link buffer memory, determining of this threshold value is relevant with number of users, user business type, delay requirement and channel condition etc.Buffer
RelayBy Relay user's (user who directly connects Relay equipment) statistical measurement and report Relay equipment, send to the base station by Relay equipment then.
First resource utilization greater than the first default resource utilization threshold value and/or second resource utilization greater than the second default resource utilization threshold value, or RelayAccess link data in buffer amount is greater than the first default buffer threshold value, all illustrate resource-constrained, might be that Backhaul is resource-constrained, also might be that Access is resource-constrained.When Backhaul is resource-constrained, can cause the data in the Relay Access link buffer memory can not be uploaded to the base station timely and cause the Relay side data to overflow.When Access is resource-constrained, can cause the user because resource is not enough, speed is lower.The Backhaul resource too much causes the wasting of resources, and system effectiveness is lower.Need to adjust the resource allocation parameters value this moment, to adjust the resource of distributing.On the contrary, the Backhaul link has relative sufficient resources to transmit data with the Access link, and the possibility that data are overflowed is less, can not adjust the resource allocation parameters value.Other implementation can also be arranged, guaranteeing that enough resource transmission data are arranged, avoid the least possible under the prerequisite that data overflow, not enumerate one by one herein for the scheme of Backhaul link assignment resource all is applicable to present embodiment.
Ascending resource is similar with distributing, when needing the allocation of downlink resource and during greater than default difference threshold value, control module 101 also be used to judge first resource utilization whether greater than the first default resource utilization threshold value and second resource utilization whether greater than the second default resource utilization threshold value.Link circuit resource distribution module 102 also is used for when all being not more than, according to Backhaul link and the corresponding respectively resource allocation parameters value of Access link is Backhaul link and Access link assignment resource, otherwise, determine resource utilization link corresponding bigger in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and the resource allocation parameters value of another link of reduction.
Perhaps, when needing the allocation of downlink resource and during greater than default difference threshold value, control module 101 also is used to judge base station data in buffer amount Buffer
ENBWhether greater than the second default buffer threshold value Δ
3Link circuit resource distribution module 102 also be used for greater than the time, i.e. Buffer
ENB＞Δ
3The time, then determine bigger resource utilization link corresponding in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and reduce the resource allocation parameters value of another link, when being not more than, i.e. Buffer
ENB≤ Δ
3The time, be Backhaul link and Access link assignment resource according to Backhaul link and the corresponding respectively resource allocation parameters value of Access link.Δ
3Be the minimum threshold of base station side buffer memory, determining of this threshold value is relevant with type of service, delay requirement and channel condition etc.
The base station also comprises: interface module 104 and memory module 105.
Above base station is that the resource of Backhaul link and Access link assignment is the total resources on the link.When the base station is connected with a plurality of Relay equipment, also need resource allocation with the Backhaul link to a plurality of Relay equipment.Then, the base station also comprises: device resource allocation module 106 is used for giving a plurality of Relay equipment with the resource allocation for the Backhaul link assignment.
Device resource allocation module 106 has multiple specific implementation, as giving a plurality of Relay equipment for the resource mean allocation of Backhaul link assignment; Perhaps account for Relay total number of users purpose ratio under a plurality of Relay equipment, the Backhaul link circuit resource is distributed to a plurality of Relay equipment according to number of users under each Relay equipment; Perhaps, the Backhaul link circuit resource is distributed to a plurality of Relay equipment according to a plurality of Relay equipment corresponding service amount separately.Device resource allocation module 106 can also have other implementation, and as distributing resource according to channel quality etc., any resource distribution mode all is applicable to present embodiment, does not enumerate one by one herein.
Base station, Relay equipment, grand user and Relay user's annexation is referring to shown in Figure 3.
More than introduced the internal structure and the function of base station, below the resource allocation methods of mainly being realized by the base station has been introduced.
Referring to Fig. 4, the main method flow process of resource allocation in the present embodiment is as follows:
Step 401: the absolute value of the difference of second resource utilization of first resource utilization of Backhaul link and Access link and default difference threshold value are compared.
Step 402: when being not more than default difference threshold value, according to being Backhaul link and Access link assignment resource for the default respectively resource allocation parameters value of Backhaul link and Access link.
Step 403: when the time greater than default difference threshold value, size according to first resource utilization and second resource utilization, improve wherein resource allocation parameters value than large resource utilance respective links, reducing the resource allocation parameters value of wherein less resource utilization respective links, is Backhaul link and Access link assignment resource according to adjusted resource allocation parameters value.
For more rational Resources allocation, present embodiment has multiple specific implementation, introduces the implementation procedure of resource allocation in detail below by 4 embodiment.
At first provide the initial value y of the resource allocation parameters value of Backhaul link and Access link
0And x
0, the acquisition of initial value is as follows: initial value module 103 is established f
1* x
0=f
2* y
0, and x
0+ y
0=T, and then have
With
Initial value for the resource allocation parameters value y of Backhaul link assignment
Initial value for the resource allocation parameters value x of Access link assignment
Wherein T is the interface-free resources total amount, f
1Be the spectrum efficiency of Access link, f
2Spectrum efficiency for the Backhaul link.f
1And f
2Can obtain by emulation experiment, or rule of thumb set.
Referring to Fig. 5, as follows in the present embodiment according to the method flow of resource utilization allocation of downlink resource:
The second resource utilization u of the descending Access link of step 501:Relay device statistics
2, and send it to the base station by signaling.
Step 502: the base station is with the first resource utilization u of descending Backhaul link
1With the second resource utilization u
2Compare, judge the first resource utilization u
1With the second resource utilization u
2The absolute value of difference whether greater than default difference threshold value Δ, if then continue step 503, otherwise continue step 504.
Step 503: the first resource utilization u is judged in the base station
1Whether greater than the first default resource utilization threshold value Δ
1And the second resource utilization u
2Whether greater than the second default resource utilization threshold value Δ
2, if all be not more than, then continue step 504, otherwise continue step 505.
Step 504: the base station is descending Backhaul link and descending Access link assignment resource according to descending Backhaul link and corresponding respectively resource allocation parameters value y and the x of descending Access link.
Step 505: judge the first resource utilization u
1Whether greater than the second resource utilization u
2If,, then continue step 506, otherwise continue step 507.
Step 506: the resource allocation parameters value y of descending Backhaul link is improved default amplitude, ao t, and the resource allocation parameters value x of descending Access link is reduced this amplitude, ao t.That is, y=y+ Δ t, x=x-Δ t.
Step 507: the resource allocation parameters value y of descending Backhaul link is reduced default amplitude, ao t, and the resource allocation parameters value x of descending Access link is improved this amplitude, ao t.That is, y=y-Δ t, x=x+ Δ t.
Step 508: according to adjusted resource allocation parameters value is descending Backhaul link and descending Access link assignment resource.
Present embodiment is after carry out step 508, and communication system operation a period of time is when arriving a default resource allocation cycle, recomputate statistics such as resource utilization, be equivalent to repeating step 501, and then judge, repeating step 502, and carry out the subsequent flows journey.
After step 504 and 508, can further the resource of descending Backhaul link be segmented according to Relay equipment and grand user.
Referring to Fig. 6, as follows in the present embodiment according to the method flow of data in buffer amount allocation of downlink resource:
The second resource utilization u of the descending Access link of step 601:Relay device statistics
2, and send it to the base station by signaling.
Step 602: the base station is with the first resource utilization u of descending Backhaul link
1With the second resource utilization u
2Compare, judge the first resource utilization u
1With the second resource utilization u
2The absolute value of difference whether greater than default difference threshold value Δ, if then continue step 603, otherwise continue step 604.
Step 603: base station data in buffer amount Buffer is judged in the base station
ENBWhether greater than the second default buffer threshold value Δ
3If,, then continue step 605, otherwise continue step 604.
Step 604: the base station is descending Backhaul link and descending Access link assignment resource according to descending Backhaul link and the corresponding respectively resource allocation parameters value of descending Access link.
Step 605: judge the first resource utilization u
1Whether greater than the second resource utilization u
2If,, then continue step 606, otherwise continue step 607.
Step 606: the resource allocation parameters value y of descending Backhaul link is improved default amplitude, ao t, and the resource allocation parameters value x of descending Access link is reduced amplitude, ao t.
Step 607: the resource allocation parameters value y of descending Backhaul link is reduced default amplitude, ao t, and with the resource allocation parameters value x increase rate Δ t of descending Access link.
Step 608: according to adjusted resource allocation parameters value is descending Backhaul link and descending Access link assignment resource.
Present embodiment communication system operation a period of time, when arriving a default resource allocation cycle, recomputates resource utilization and base station data in buffer amount Buffer after carry out step 608
ENBEtc. statistics such as statistics, be equivalent to repeating step 601, and then judge, repeating step 602, and carry out the subsequent flows journey.
After step 604 and 608, can further the resource of descending Backhaul link be segmented according to Relay equipment and grand user.
Referring to Fig. 7, distribute the method flow of ascending resource as follows according to resource utilization in the present embodiment:
The second resource utilization u of the up Access link of step 701:Relay device statistics
2, and send it to the base station by signaling.
Step 702: the base station is with the first resource utilization u of up Backhaul link
1With the second resource utilization u
2Compare, judge the first resource utilization u
1With the second resource utilization u
2The absolute value of difference whether greater than default difference threshold value Δ, if then continue step 703, otherwise continue step 704.
Step 703: the first resource utilization u is judged in the base station
1Whether greater than the first default resource utilization threshold value Δ
1And the second resource utilization u
2Whether greater than the second default resource utilization threshold value Δ
2, if all be not more than, then continue step 704, otherwise continue step 705.
Step 704: the base station is up Backhaul link and up Access link assignment resource according to up Backhaul link and the corresponding respectively resource allocation parameters value of up Access link.
Step 705: judge the first resource utilization u
1Whether greater than the second resource utilization u
2If,, then continue step 706, otherwise continue step 707.
Step 706: the resource allocation parameters value y of up Backhaul link is improved default amplitude, ao t, and the resource allocation parameters value x of up Access link is reduced amplitude, ao t.
Step 707: the resource allocation parameters value y of up Backhaul link is reduced default amplitude, ao t, and with the resource allocation parameters value x increase rate Δ t of up Access link.
Step 708: according to adjusted resource allocation parameters value is up Backhaul link and up Access link assignment resource.
Present embodiment is after carry out step 708, and communication system operation a period of time is when arriving a default resource allocation cycle, recomputate statistics such as resource utilization, be equivalent to repeating step 701, and then judge, be equivalent to repeating step 702, and carry out the subsequent flows journey.
After step 704 and 708, can further Relay equipment and grand user be arrived in the resource allocation of up Backhaul link.
Referring to Fig. 8, distribute the method flow of ascending resource as follows according to the data in buffer amount in the present embodiment:
The second resource utilization u of the up Access link of step 801:Relay device statistics
2With the buffer data size of Relay reporting of user, and two information are sent to the base station by signaling.
Step 802: the base station is with the first resource utilization u of up Backhaul link
1With the second resource utilization u
2Compare, judge the first resource utilization u
1With the second resource utilization u
2The absolute value of difference whether greater than default difference threshold value Δ, if then continue step 803, otherwise continue step 804.
Step 803: Relay side data in buffer amount Buffer is judged in the base station
RelayWhether greater than the first default buffer threshold value Δ
4If,, then continue step 805, otherwise continue step 804.Relay side data in buffer amount Buffer
RelayBe Relay user's statistics and the buffer data size that reports Relay equipment, and send to the base station by Relay equipment.
Step 804: the base station is up Backhaul link and up Access link assignment resource according to up Backhaul link and the corresponding respectively resource allocation parameters value of up Access link.
Step 805: judge the first resource utilization u
1Whether greater than the second resource utilization u
2If,, then continue step 806, otherwise continue step 807.
Step 806: the resource allocation parameters value y of up Backhaul link is improved default amplitude, ao t, and the resource allocation parameters value x of up Access link is reduced amplitude, ao t.
Step 807: the resource allocation parameters value y of up Backhaul link is reduced default amplitude, ao t, and with the resource allocation parameters value x increase rate Δ t of up Access link.
Step 808: according to adjusted resource allocation parameters value is up Backhaul link and up Access link assignment resource.
Present embodiment is after carry out step 808, communication system operation a period of time, when arriving a default resource allocation cycle, recomputate statistics such as resource utilization and Relay Access link data in buffer amount, be equivalent to repeating step 801, and then judge, repeating step 802, and carry out the subsequent flows journey.
After step 804 and 808, can further Relay equipment and grand user be arrived in the resource allocation of up Backhaul link.
Be used to realize that the software of the embodiment of the invention can be stored in storage mediums such as floppy disk, hard disk, CD and flash memory.
It is Backhaul link and Access link assignment resource that the embodiment of the invention adopts semi-static mode, has both solved the dumb variety of problems that causes of fixed allocation, has solved the problems such as complexity height of pure dynamic assignment again.The embodiment of the invention is carried out initial configuration based on Backhaul and Access link channel condition, again according to the semi-static adjustment of the resource utilization of base station side in every sub-district/Relay Access link buffer data size size, Backhaul and Access link be updated to the resource of Backhaul link assignment.Can guarantee can not distribute on the Backhaul link the too much resource of Relay like this, improved resource utilization, in the time of guaranteeing descending Access link transmission again, Relay user can not influence Relay user's scheduling because of there not being enough data to send in the Relay equipment, can be when up owing to Backhaul is not resource-constrained, make the overabundance of data in the RelayAccess link buffer memory and overflow.Resource allocation methods with respect to fixing has promoted system effectiveness and fairness; With respect to the resource allocation methods of pure dynamic dispatching, implementation complexity is lower, and expense is less.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1. the resource allocation methods in the relay system is characterized in that, may further comprise the steps:
First resource utilization of backhaul Backhaul link is compared with the absolute value of the difference of second resource utilization that inserts the Access link and default difference threshold value;
When being not more than default difference threshold value, be Backhaul link and Access link assignment resource according to Backhaul link and the corresponding respectively resource allocation parameters value of Access link;
When greater than default difference threshold value, size according to first resource utilization and second resource utilization, improve wherein resource allocation parameters value than large resource utilance respective links, reducing the resource allocation parameters value of wherein less resource utilization respective links, is Backhaul link and Access link assignment resource according to adjusted resource allocation parameters value.
2. the method for claim 1 is characterized in that, also comprises step: will give a plurality of relaying Relay equipment for the resource allocation of Backhaul link assignment.
3. method as claimed in claim 2 is characterized in that, will give the step of a plurality of Relay equipment for the resource allocation of Backhaul link assignment and comprise:
To give a plurality of Relay equipment for the resource mean allocation of Backhaul link assignment; Perhaps
Account for Relay total number of users purpose ratio under a plurality of Relay equipment according to number of users under each Relay equipment, the Backhaul link circuit resource is distributed to a plurality of Relay equipment; Perhaps
According to a plurality of Relay equipment corresponding service amount separately, the Backhaul link circuit resource is distributed to a plurality of Relay equipment.
4. as each described method in the claim 1 to 3, it is characterized in that the resource allocation parameters value that is initially the Backhaul link assignment is
The resource allocation parameters value that is initially the Access link assignment is
Wherein T is the interface-free resources total amount, f
1Be the spectrum efficiency of Access link, f
2Spectrum efficiency for the Backhaul link.
5. the method for claim 1 is characterized in that, the amplitude of the amplitude of the resource allocation parameters value of raising and the resource allocation parameters value of reduction all is to determine according to one in channel condition, traffic performance and the interface-free resources size or multinomial factor.
6. as each described method in the claim 1 to 3, it is characterized in that, when needs distribute ascending resource, first resource utilization of Backhaul link is first resource utilization of up Backhaul link, second resource utilization of Access link is second resource utilization of up Access link, for the resource of Backhaul link and Access link assignment is the ascending resource of Backhaul link and Access link;
When needs allocation of downlink resource, first resource utilization of Backhaul link is first resource utilization of descending Backhaul link, second resource utilization of Access link is second resource utilization of descending Access link, for the resource of Backhaul link and Access link assignment is the downlink resource of Backhaul link and Access link.
7. method as claimed in claim 6, it is characterized in that, when needs distribute ascending resource and during greater than default difference threshold value, judge first resource utilization whether greater than the first default resource utilization threshold value and second resource utilization whether greater than the second default resource utilization threshold value, when all being not more than, according to being Backhaul link and Access link assignment resource for the default respectively resource allocation parameters value of Backhaul link and Access link, otherwise, determine resource utilization link corresponding bigger in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and the resource allocation parameters value of another link of reduction; Perhaps
When needs distribute ascending resource and during greater than default difference threshold value, judge that whether the data in buffer amount is greater than the first default buffer threshold value on the Relay Access link, if greater than, then determine bigger resource utilization link corresponding in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and reduce the resource allocation parameters value of another link, otherwise according to being Backhaul link and Access link assignment resource for Backhaul link and the default respectively resource allocation parameters value of Access link.
8. method as claimed in claim 6, it is characterized in that, when needing the allocation of downlink resource and during greater than default difference threshold value, judge first resource utilization whether greater than the first default resource utilization threshold value and second resource utilization whether greater than the second default resource utilization threshold value, when all being not more than, according to being Backhaul link and Access link assignment resource for the default respectively resource allocation parameters value of Backhaul link and Access link, otherwise, determine resource utilization link corresponding bigger in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and the resource allocation parameters value of another link of reduction; Perhaps
When needing the allocation of downlink resource and during greater than default difference threshold value, judge that whether base station side data in buffer amount is greater than the second default buffer threshold value, if greater than, then determine bigger resource utilization link corresponding in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and reduce the resource allocation parameters value of another link, otherwise according to being Backhaul link and Access link assignment resource for Backhaul link and the default respectively resource allocation parameters value of Access link.
9. a base station is characterized in that, comprising:
Control module is used for first resource utilization of backhaul Backhaul link is compared with the absolute value of the difference of second resource utilization that inserts the Access link and default difference threshold value;
The link circuit resource distribution module, be used for when being not more than default difference threshold value, according to being Backhaul link and Access link assignment resource for the default respectively resource allocation parameters value of Backhaul link and Access link, when greater than default difference threshold value, size according to first resource utilization and second resource utilization, improve wherein resource allocation parameters value than large resource utilance respective links, reducing the resource allocation parameters value of wherein less resource utilization respective links, is Backhaul link and Access link assignment resource according to adjusted resource allocation parameters value.
10. base station as claimed in claim 9, it is characterized in that, control module also is used for, when needs distribute ascending resource and during greater than default difference threshold value, judge first resource utilization whether greater than the first default resource utilization threshold value and second resource utilization whether greater than the second default resource utilization threshold value; The link circuit resource distribution module also is used for when all being not more than, according to being Backhaul link and Access link assignment resource for the default respectively resource allocation parameters value of Backhaul link and Access link, otherwise, determine resource utilization link corresponding bigger in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and the resource allocation parameters value of another link of reduction; Perhaps
Control module also is used for, when needs distribute ascending resource and during greater than default difference threshold value, judge that whether the data in buffer amount is greater than the first buffer threshold value of presetting on the Relay Access link; The link circuit resource distribution module also be used for greater than the time, then determine bigger resource utilization link corresponding in first resource utilization and second resource utilization, and improving the resource allocation parameters value of this link and the resource allocation parameters value of another link of reduction, basis is that Backhaul link and the default respectively resource allocation parameters value of Access link are Backhaul link and Access link assignment resource when being not more than.
11. base station as claimed in claim 9, it is characterized in that, control module also is used for, when needing the allocation of downlink resource and during greater than default difference threshold value, judge first resource utilization whether greater than the first default resource utilization threshold value and second resource utilization whether greater than the second default resource utilization threshold value; The link circuit resource distribution module also is used for when all being not more than, according to being Backhaul link and Access link assignment resource for the default respectively resource allocation parameters value of Backhaul link and Access link, otherwise, determine resource utilization link corresponding bigger in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and the resource allocation parameters value of another link of reduction; Perhaps
Control module also is used for, when needing the allocation of downlink resource and during greater than default difference threshold value, judging that whether base station side data in buffer amount is greater than the second buffer threshold value of presetting; The link circuit resource distribution module also be used for greater than the time, then determine bigger resource utilization link corresponding in first resource utilization and second resource utilization, and improve the resource allocation parameters value of this link and reduce the resource allocation parameters value of another link, when being not more than, according to being Backhaul link and Access link assignment resource for the default respectively resource allocation parameters value of Backhaul link and Access link.
12. base station as claimed in claim 9 is characterized in that, also comprises: the device resource allocation module is used for giving a plurality of relaying Relay equipment with the resource allocation for the Backhaul link assignment.
13. base station as claimed in claim 12 is characterized in that, the device resource allocation module specifically is used for giving a plurality of Relay equipment with the resource mean allocation for the Backhaul link assignment; Perhaps account for Relay total number of users purpose ratio under a plurality of Relay equipment, the Backhaul link circuit resource is distributed to a plurality of Relay equipment according to number of users under each Relay equipment; Perhaps, the Backhaul link circuit resource is distributed to a plurality of Relay equipment according to a plurality of Relay equipment corresponding service amount separately.
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| CN 201010100591 CN102137498B (en) | 2010-01-22 | 2010-01-22 | Method and device for allocating resources in relay system |
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