CN102833868A - Method for scheduling independent carrier in multi-carrier system based on preassigning - Google Patents
Method for scheduling independent carrier in multi-carrier system based on preassigning Download PDFInfo
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Abstract
The invention discloses a method for scheduling the independent carrier in a multi-carrier system based on preassigning, comprising the following steps: determining the preassigning queues of all activated carriers according to the priority of each updated activated carrier and the level of all services of all users when each sub-frame arrives and a load balancing cycle timer expires; sequencing the services in the preassigning queues of all the activated carriers in sequence accroding to the sequence of the priority of the services from high to low to form the priority queues of all the activated carriers; and finally allotting resources to all the services in the priority queues of all the activated carriers in sequence according to the sequence of the priority queues. Due to the adoption of the method, the load among all the activated carriers can be balanced.
Description
Technical field
The present invention relates to field of wireless communication, in particularly a kind of multicarrier system based on preallocated Independent Carrier Wave dispatching method.
Background technology
In order to satisfy the demand of IMT-Advanced; 3GPP has carried out the research of LTE-Advanced project; It is the evolution system of LTE; In some key technologies of LTE-Advanced, carrier aggregation technology is to improve the direct method of message transmission rate, and carrier aggregation technology can join together a plurality of carrier waves to use.
In multicarrier system, the common dispatching algorithm that can be applicable under the multi-carrier polymerizing scene is mainly Independent Carrier Wave dispatching algorithm (CIS) and united carrier dispatching algorithm (MCJS) at present.Wherein, the united carrier dispatching algorithm is changed bigger to existing Rel-8/9 system architecture, and the implementation of Independent Carrier Wave dispatching algorithm and Rel-8/9 realize that framework is compatible better.
Because the present invention only relates to the improvement to the Independent Carrier Wave dispatching method, so temporarily only Independent Carrier Wave dispatching method of the prior art is introduced.
The characteristics of Independent Carrier Wave dispatching algorithm are each carrier wave independent allocation resources, independently on the carrier wave scheduler are arranged respectively at each, and the upper strata after carrier aggregation does not increase new schedule level one device.The Independent Carrier Wave dispatching method is roughly following in the prior art: at first different users is allocated in advance to different activation carrier waves; Activate carrier wave for each then; Activate user's on the carrier wave service priority or activate user's on the carrier wave priority based on this, carry out resource allocation from the business that height to low order is followed successively by user on this activation carrier wave according to priority based on this.
Need to prove that the ascending resource allocation requirements is continuous for the resource that the user distributes, therefore; During uplink scheduling, activate carrier wave, activate all users' on the carrier wave priority based on this for each; Priority according to the user is carried out resource allocation from the business that height to low order is followed successively by user on this activation carrier wave; Wherein, in practical application, can the priority of this certain main business of user be regarded as this user's priority; And downlink resource distributes and can distribute available Resource Block arbitrarily for the user; Therefore; During descending scheduling; Activate carrier wave for each, activate user's on the carrier wave service priority, carry out resource allocation from the business that height to low order is followed successively by user on this activation carrier wave according to service priority based on this.Wherein, definite method of service priority can be dependent on the calculating of priority factors, and the calculating of priority factors may be with reference to parameters such as this professional service quality (QoS) requirement, channel qualities.Because the common means in the existing communication field that is calculated as of priority factors, concrete computational methods can no longer detail with reference to existing pertinent literature here.
For Independent Carrier Wave dispatching method of the prior art is further clearly explained, be scheduling to example with descending Independent Carrier Wave and be illustrated at present.
Activate carrier wave (carrier wave 1 and carrier wave 2) with 2 and be polymerized to example, suppose that user's total amount is 5, is designated as user 1, user 2... user 5 respectively.At first, can user 1 and user 2 be allocated in advance to carrier wave 1, user 3, user 4 and user 5 are dispensed to carrier wave 2, in practical application, above-mentioned allocating in advance is random fashion usually.Then, when descending scheduling sublayer frame arrives, respectively for carrier wave 1 and carrier wave 2; Service priority according to all users on this activation carrier wave carries out resource allocation from the business that height to low order is followed successively by all users on this activation carrier wave; With carrier wave 1 is example, supposes user's 1 supporting business 1 and business 2, user's 2 supporting businesses 3; Computational methods according to priority factors; Suppose that determined service priority is followed successively by from height to low order: business 3,2,1, then be followed successively by professional 3,2,1 Resources allocation, the concrete grammar of resource allocation can be with reference to the explanation of Rel-8/9 related Sections.For carrier wave 2 also is above-mentioned similar dispatching method.
To sum up, according to Independent Carrier Wave dispatching method of the prior art, owing to need in advance the user to be dispensed on the different activation carrier waves; Do not consider that each activates the current loading condition of carrier wave carrying out the branch timing; And, because the qos requirement of the business of different user support also is not quite similar, therefore; The activation carrier wave that might cause is owing to loaded service seldom causes the wasting of resources; And the activation carrier wave that has causes jam owing to loaded service is excessive, and is visible, and the load that Independent Carrier Wave dispatching method of the prior art may cause each to activate between the carrier wave is unbalanced.
Summary of the invention
In view of this, the present invention provides in a kind of multicarrier system based on preallocated Independent Carrier Wave dispatching method, can activate the load between carrier wave by balanced each.
For realizing the foregoing invention purpose, technical scheme of the present invention is achieved in that
In a kind of multicarrier system based on preallocated Independent Carrier Wave dispatching method, the length of pre-configured load balancing cycle timer, this method also comprises:
A, when each subframe arrives, judge whether the load balancing cycle timer expires, if expire, execution in step B then; Otherwise, direct execution in step C;
B, activate the priority of carrier wave and all professional grades of service of all users, confirm that each activates the preassignment formation of carrier wave according to after upgrading each;
C, according to the priority of business from height to low order, respectively each business that activates in the preassignment formation of carrier wave is carried out prioritization, form the priority query that each activates carrier wave;
D, according to the order of priority query, be followed successively by each traffic assignments resource that each activates the priority query of carrier wave.
The said subframe of steps A is descending scheduling subframe or uplink scheduling subframe.
Step B is said to confirm that each method that activates the preassignment formation of carrier wave comprises:
According to each load that activates carrier wave, upgrade the priority that each activates carrier wave, wherein, the load that activates carrier wave is light more, and the priority that then activates carrier wave is high more, and the load that activates carrier wave is heavy more, and the priority that then activates carrier wave is low more;
According to all professional grades of service of all users from height to low order; And activate carrier wave priority from height to low order; Successively each traffic assignments is activated on the carrier wave to corresponding with polling mode; After then distributing end, each business that activates on carrier wave is formed the preassignment formation that this activates carrier wave.
Activate the preassignment formation of carrier wave if not confirm each for the first time, then said definite preassignment formation is the preassignment formation after upgrading.
The said grade of service is professional service quality QoS requirements, and wherein, professional qos requirement is high more, and then the grade of service is high more, and professional qos requirement is low more, and then the grade of service is low more.
The said service priority of step C confirms that according to the priority factors of business the priority factors of said business is with reference to the grade of service, channel conditions and traffic delay requirement.
Activate the priority query of carrier wave if not confirm each for the first time, then said definite priority query is the priority query after upgrading.
If the said load balancing cycle timer of steps A is not yet due, the then determined preassignment formation when expiring of preassignment formation described in the step C apart from the last cycle timer of current time.
According to technical scheme provided by the present invention; When each subframe arrives; If the load balancing cycle timer expires, then activate the priority of carrier wave and all professional grades of service of all users confirm that each activates the preassignment formation of carrier wave according to after upgrading each, then according to the priority of business from height to low order; Respectively the business in the preassignment formation of each activation carrier wave is carried out prioritization; Form the priority query that each activates carrier wave,, be followed successively by each traffic assignments resource that each activates the priority query of carrier wave at last according to the order of priority query.It is thus clear that the present invention has considered the loading condition of carrier wave during preassignment before Resources allocation, and has combined the grade of service, therefore avoided occurring the unbalanced situation of load between the carrier wave, can activate the load between carrier wave by balanced each.
Description of drawings
Fig. 1 is based on the flow chart of preallocated Independent Carrier Wave dispatching method in a kind of multicarrier system provided by the present invention.
Fig. 2 is based on the flow chart of the embodiment of preallocated Independent Carrier Wave dispatching method in a kind of multicarrier system provided by the present invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, scheme according to the invention is done to specify further.
Fig. 1 is based on the flow chart of preallocated Independent Carrier Wave dispatching method in a kind of multicarrier system provided by the present invention.As shown in Figure 1, this method may further comprise the steps:
Step 101, the length of pre-configured load balancing cycle timer.
Step 102 when each subframe arrives, judges whether the load balancing cycle timer expires, if expire, then execution in step 103; Otherwise, direct execution in step 104.
Step 103 according to the priority of each the activation carrier wave after upgrading and all professional grades of service of all users, confirms that each activates the preassignment formation of carrier wave.
Step 104 from height to low order, is carried out prioritization to each business that activates in the preassignment formation of carrier wave according to the priority of business respectively, forms the priority query that each activates carrier wave.
Step 105 according to the order of priority query, is followed successively by each traffic assignments resource that each activates the priority query of carrier wave.
So far, this flow process finishes.
Fig. 2 is based on the flow chart of the embodiment of preallocated Independent Carrier Wave dispatching method in a kind of multicarrier system provided by the present invention.In the present embodiment, describe with the descending example that is scheduling to.In addition, describe for ease, unless stated otherwise, carrier wave described in the present embodiment all refers to activate carrier wave.
As shown in Figure 2, this embodiment may further comprise the steps (Fig. 2 adopts " Y " expression judged result to be " being ", and adopting " N " expression judged result is " denying "):
In this step, if the descending scheduling subframe arrives, then expression can begin to carry out the subsequent operation of descending scheduling, if any operation is not then carried out in the also no show of descending scheduling subframe, continues to wait for the arrival of descending scheduling subframe.
Before this step, also need the length T of pre-configured load balancing cycle timer, the length T of load balancing cycle timer is an one-period, is the overdue moment of load balancing cycle timer the finish time in each cycle.
Present embodiment does not limit the length T of load balancing cycle timer, and the length T of load balancing cycle timer is looked concrete condition and is provided with.Reach optimum load balancing property if expect each carrier wave, then can be provided with T smaller, certainly; This has increased the computation burden of system again; Therefore, in practical application, the load balancing property that we generally consider each carrier wave within the acceptable range; And consider to try one's best not for system increases excessive computation burden, confirm the concrete numerical value of T with this.
In the present embodiment,, be provided with the load balancing cycle timer, periodically to upgrade the preassignment formation of each carrier wave according to the loading condition of each carrier wave in order to safeguard the load balancing of intercarrier better.
Specifically, step 204 comprises following two steps: at first, and according to the loading condition of this each carrier wave of sub-district; Upgrade the priority of each carrier wave of this sub-district, the load of carrier wave is light more, and then the priority of carrier wave is high more; The load of carrier wave is heavy more, and then the priority of carrier wave is low more.Secondly; According to all professional grades of service of all users of this sub-district from height to low order; And carrier wave priority is from height to low order; Successively with on the extremely corresponding carrier wave of each traffic assignments, after then distribution finished, the business on each carrier wave was formed the preassignment formation of this carrier wave with polling mode.
Need to prove; Owing to when last once load balancing cycle timer expires, also upgraded carrier wave priority, also business distributed; Also confirmed the preassignment formation of each carrier wave; Therefore, confirm the preassignment formation if not first, this load balancing cycle timer is actual to the determined preassignment formation of after date to be preassignment formation after the renewal.
In practical application, after first descending scheduling subframe arrived, the load balancing cycle timer expired for the first time usually, with the first preassignment formation of confirming carrier wave.
Below, the above-mentioned poll method of salary distribution is illustrated.
With two carrier waves is example, supposes that the priority of carrier wave from height to low order is: carrier wave 1, carrier wave 2, suppose that all users of this sub-district are user 1 and user 2, and user's 1 supporting business 1,2,3, user's 2 supporting businesses 4,5.From height to low rank order (professional qos requirement is high more, and then the grade of service is high more), suppose that all professional grades of service of all users of this sub-district from height to low order are: professional 1,2,3,4,5 according to the qos requirement of business.Then the process of poll distribution is: business 1 is dispensed to carrier wave 1; Business 2 is dispensed to carrier wave 2; And then business 3 is dispensed to carrier wave 1, and business 4 is dispensed to carrier wave 2, at last business 5 is dispensed to carrier wave 1; Then the preassignment formation on the carrier wave 1 is: business 1,3,5, the preassignment formation on the carrier wave 2 is: professional 2,4.
Needing ben is that service priority described in this step is different implications with the grade of service described in the last step.The grade of service usually as a reference with the qos requirement of business, professional qos requirement is high more, then the grade of service is high more, and service priority not only with the qos requirement of business as a reference, possibly go back parameters such as reference channel condition, service delay requirement.Definite method of service priority can rely on the calculating of priority factors, and the calculating of priority factors may be with reference to parameters such as this professional service quality (QoS) requirement, channel qualities, and concrete calculating can be with reference to the relevant introduction among the Rel-8/9.
Need to prove that if not the first priority query that confirms carrier wave, then this determined priority query is actual is the priority query after upgrading.And; In this descending scheduling subframe; If execution in step 204 (being that the load balancing cycle timer is not yet due) not before this step; The preassignment formation that then relates in this step is last (the last apart from current time) determined preassignment formation when cycle timer expires, actual be on when once cycle timer expires the business in the determined preassignment formation carry out prioritization.
The priority query that can suppose carrier wave 1 is: business 1,5,3, the priority query of carrier wave 2 is: professional 4,2.
In following step 206～212; The business in the priority query of each carrier wave of being followed successively by is carried out resource allocation, and (order according to from head of the queue to the tail of the queue of priority query is carried out resource allocation to each business; Promptly carry out resource allocation from height to low order according to service priority; Each carrier wave is not always the case); The concrete scheme of resource allocation is still continued to use the correlation technique that downlink resource distributes among the Rel-8/9, and only object for allocation no longer is all business of the user on this carrier wave, but this carrier wave is attend the business in the priority query.
Following step 206～212 are only as illustrating.
When first time during execution in step 206, suppose carrier wave 1 earlier as current carrier wave, when second time during execution in step 206, suppose carrier wave 2 remake and be current carrier wave, certainly also can be earlier with carrier wave 2 as current carrier wave, again with carrier wave 1 as current carrier wave.Present embodiment does not limit the order that carrier resource distributes.
Step 207 judges whether current carrier wave also has residual resource, if residual resource is arranged, then execution in step 208; Otherwise, execution in step 212.
Step 209 is for i business in the priority query of current carrier wave carried out resource allocation (being scheduling).
The method of resource allocation adopts the descending scheduling Resource Allocation Formula of Rel-8/9, will not give unnecessary details here.
Step 210 is calculated i+1, with i+1 as the i after upgrading.
Step 211 judges whether for all the traffic assignments resources (whether the priority query of promptly judging current carrier wave travels through) in the priority query of current carrier wave, if then execution in step 212; Otherwise, return execution in step 207.
Step 212 judges whether all carrier waves all as mistake current carrier wave (judging whether that promptly all carrier waves have all carried out resource allocation), if, then direct execution in step 213; Otherwise, the value of i is changed to 1 again, select next carrier wave as current carrier wave, return execution in step 206 then;
Through the introduction of the foregoing description, can find out, in the present embodiment; In each descending scheduling subframe, periodically upgrade carrier wave priority according to the loading condition of carrier wave, according to all professional grades of service of all users from height to low order; And carrier wave priority from height to low order, with polling mode successively with each traffic assignments to corresponding carrier wave, to upgrade the preassignment formation of each carrier wave; Form the priority query of each carrier wave then to low order from height according to the service priority in the preassignment formation of each carrier wave; In each carrier wave,, be followed successively by each business and carry out resource allocation at last according to the order of priority query.Though be professional content of carrying out resource allocation according to the order in the priority query in the present embodiment for prior art; But inventive point of the present invention is to carry out resource allocation method for pre-distributing before; Considered the loading condition of carrier wave during preassignment; And combined the grade of service, therefore avoided occurring the unbalanced situation of load between the carrier wave.
Need to prove, in each descending scheduling subframe, all implement according to above-mentioned steps 201～213.Though present embodiment describes with the descending example that is scheduling to, but the scheme of present embodiment also can be applicable to uplink scheduling, the ins and outs that art technology can disclose according to present embodiment are to realize uplink scheduling.
So far, this flow process finishes.
To sum up; In the present invention, when each subframe arrives, if the load balancing cycle timer expires; Then confirm that according to the priority of each the activation carrier wave after upgrading and all professional grades of service of all users each activates the preassignment formation of carrier wave; Then according to the priority of business from height to low order, respectively each business that activates in the preassignment formation of carrier wave is carried out prioritization, form the priority query that each activates carrier wave; According to the order of priority query, be followed successively by each traffic assignments resource that each activates the priority query of carrier wave at last.It is thus clear that the present invention has considered the loading condition of carrier wave during preassignment before Resources allocation, and has combined the grade of service, therefore avoided occurring the unbalanced situation of load between the carrier wave, can activate the load between carrier wave by balanced each.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
- In the multicarrier system based on preallocated Independent Carrier Wave dispatching method, it is characterized in that, the length of pre-configured load balancing cycle timer, this method also comprises:A, when each subframe arrives, judge whether the load balancing cycle timer expires, if expire, execution in step B then; Otherwise, direct execution in step C;B, activate the priority of carrier wave and all professional grades of service of all users, confirm that each activates the preassignment formation of carrier wave according to after upgrading each;C, according to the priority of business from height to low order, respectively each business that activates in the preassignment formation of carrier wave is carried out prioritization, form the priority query that each activates carrier wave;D, according to the order of priority query, be followed successively by each traffic assignments resource that each activates the priority query of carrier wave.
- 2. method according to claim 1 is characterized in that, the said subframe of steps A is descending scheduling subframe or uplink scheduling subframe.
- 3. method according to claim 2 is characterized in that, step B is said to confirm that each method that activates the preassignment formation of carrier wave comprises:According to each load that activates carrier wave, upgrade the priority that each activates carrier wave, wherein, the load that activates carrier wave is light more, and the priority that then activates carrier wave is high more, and the load that activates carrier wave is heavy more, and the priority that then activates carrier wave is low more;According to all professional grades of service of all users from height to low order; And activate carrier wave priority from height to low order; Successively each traffic assignments is activated on the carrier wave to corresponding with polling mode; After then distributing end, each business that activates on carrier wave is formed the preassignment formation that this activates carrier wave.
- 4. method according to claim 3 is characterized in that, activates the preassignment formation of carrier wave if not confirm each for the first time, and then said definite preassignment formation is the preassignment formation after upgrading.
- 5. method according to claim 4 is characterized in that, the said grade of service is professional service quality QoS requirements, and wherein, professional qos requirement is high more, and then the grade of service is high more, and professional qos requirement is low more, and then the grade of service is low more.
- 6. method according to claim 1 is characterized in that, the said service priority of step C confirms that according to the priority factors of business the priority factors of said business is with reference to the grade of service, channel conditions and traffic delay requirement.
- 7. method according to claim 6 is characterized in that, activates the priority query of carrier wave if not confirm each for the first time, and then said definite priority query is the priority query after upgrading.
- 8. method according to claim 7 is characterized in that, if the said load balancing cycle timer of steps A is not yet due, and the then determined preassignment formation when expiring of preassignment formation described in the step C apart from the last cycle timer of current time.
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| CN104954102A (en) * | 2014-03-27 | 2015-09-30 | 成都鼎桥通信技术有限公司 | Uplink semi-static resource user scheduling method |
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| CN1933363A (en) * | 2005-09-15 | 2007-03-21 | 大唐移动通信设备有限公司 | Method for dispatching group data transmission |
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| CN101087160A (en) * | 2006-06-08 | 2007-12-12 | 大唐移动通信设备有限公司 | A dispatching method and device for uplink enhanced priority |
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| CN1933363A (en) * | 2005-09-15 | 2007-03-21 | 大唐移动通信设备有限公司 | Method for dispatching group data transmission |
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| CN104954102A (en) * | 2014-03-27 | 2015-09-30 | 成都鼎桥通信技术有限公司 | Uplink semi-static resource user scheduling method |
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