CN100490348C - Method for realizing high-speed upward grouped data scheduling in wide-band CDMA system - Google Patents
Method for realizing high-speed upward grouped data scheduling in wide-band CDMA system Download PDFInfo
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- CN100490348C CN100490348C CNB2005100901102A CN200510090110A CN100490348C CN 100490348 C CN100490348 C CN 100490348C CN B2005100901102 A CNB2005100901102 A CN B2005100901102A CN 200510090110 A CN200510090110 A CN 200510090110A CN 100490348 C CN100490348 C CN 100490348C
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Abstract
This invention discloses a method for realizing high speed up packet data dispatch in a WCDMA system, in which, a service EDCH area compares the current tolerated maximum emission power ratio assigned to the UE and the current emission rate of the UE, if the current rate of the UE is lower than the power ratio assigned to it, the service EDCH area re-distributes AG to the UE based on the current rate of the UE to ensure the reasonable distribution of the UE resources.
Description
Technical field
The present invention relates to high speed uplink packet and insert (HSUPA) technology, refer to a kind of method that in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, realizes high-speed upward grouped data scheduling especially.
Background technology
In the WCDMA system, it is an important subject of third generation partner program (3GPP) that the data service of user terminal (UE) is dispatched always, the upward grouped data scheduling technology is wherein a kind of business, by upward grouped data scheduling, the emission rate of UE is controlled.In 3GPP Rel ' 99/Rel ' 4/Rel ' 5, upward grouped data scheduling is finished by radio network controller (RNC); And in 3GPP Rel ' 6, for Frequency Division Duplexing (FDD) (FDD) HSUPA data, upward grouped data scheduling is realized by base station node B, when the ascending load of sub-district among the Node B descends, Node B distributes higher emission rate to UE, and when the ascending load of sub-district rises in Node B, the emission rate of Node B restriction UE.Compare with the upward grouped data scheduling of being controlled by RNC, the upward grouped data scheduling of NodeB control can be made a response to the variation of ascending load quickly, thereby obtains higher cell throughout and bigger coverage.
Fig. 1 is prior art is realized upward grouped data scheduling by Node B a flow chart, generally, each UE has several wireless links (RL) simultaneously, each bar RL enhancing dedicated channel (EDCH) sub-district with different respectively is relevant, each UE only has a service EDCH sub-district, the Node B at service place, EDCH sub-district is called service EDCH Node B, and other EDCH sub-district, RL place is non-service EDCH sub-district, and the Node B at place, non-service EDCH sub-district is called non-service EDCHNodeB.Suppose among Fig. 1 that service EDCH sub-district belongs to service EDCH Node B, non-service EDCH sub-district n belongs to non-service EDCH base station n, and wherein n is a positive integer, and the specific implementation of upward grouped data scheduling may further comprise the steps:
Step 100:UE initiates to increase scheduling (SI) request of emission rate to service EDCH sub-district.
In the HSUPA technology, UE sends ascending packet data by the EDCH channel to the EDCH sub-district, and ascending packet data sends in the mode of data block.Stipulate according to agreement, UE can calculate current emission rate according to the data block that sends in the unit interval, judge that then can current emission rate satisfy the data rate requirement in the UE buffering area, if current emission rate can not satisfy, then UE sends the SI request to service EDCH sub-district, comprises the size of UE buffering area and the maximum power ratio that the UE permission is used in the SI request.Here, the data rate in the UE buffering area is that the size of UE buffering area is the data block of UE buffering area stored, with the ratio of the time of data block in the transmission UE buffering area of presetting; The maximum transmission power that UE allows to use is the intrinsic characterisitic parameter of UE itself.
Step 101～step 102: after service EDCH sub-district receives the SI request, distribute absolute scheduling indication (AG), and the AG of distributing is handed down to UE.
Service EDCH sub-district receives the SI request, after judging that service EDCH sub-district has enough resources and satisfies UE and increase the request of emission rate, service EDCH distributes AG according to the ascending load factor of self in the sub-district, promptly when self the ascending load factor during less than predetermined threshold value, service EDCH distributes AG to UE in the sub-district, also just a part of pre-allocation of resources has been given the UE that initiates the SI request simultaneously.Here, the ascending load factor of service EDCH sub-district can obtain by formula (1):
I
total/P
N＝1/(1-η
UL) (1)
Wherein, I
TotalBe total broadband reception power of Node B; P
NIt is thermal noise; η
ULIt is the ascending load factor of sub-district; I
TotalAnd P
NAll by measuring, specific implementation can repeat no more here referring to related protocol.
According to 3GPP agreement regulation, AG mainly comprises: the sign (E-RNTI) of the UE that scheduling relates to; Current permission maximum power ratio etc.
In addition, the maximum power ratio and the current permission emission maximum speed that allow to use according to agreement regulation UE have mapping relations, promptly allow the maximum power ratio of use according to UE, the current emission rate of the power ratio of the current use of UE and UE can calculate current permission emission maximum speed; And can converse current permission maximum power ratio according to current permission emission maximum speed, and current permission emission maximum speed and current permission maximum power ratio are proportional.Specific implementation can repeat no more here referring to related protocol.
Step 103: the load estimation is carried out to RL respectively in service EDCH sub-district and non-service EDCH sub-district, and sends scheduling indication (RG) relatively according to assessment result to UE respectively.
According to agreement regulation, there are three kinds of value: UP to be illustrated in to increase by one on the basis of former emission rate from the RG of service EDCH sub-district and specify step value; It is constant that HOLD represents to keep former emission rate; DOWN is illustrated in and reduces by one on the basis of former emission rate and specify step value.There have two kinds of value: HOLD to represent to keep former emission rate from the non-RG that serves the EDCH sub-district to be constant; DOWN is illustrated in and reduces one on the basis of former emission rate and specify step value.
According to the agreement regulation, estimate that by comparing the sub-district measurement uplink noise that obtains increases the factor (RoT) and the RoT thresholding of RNC for each cell configuration, determine the value of RG, as if the RoT thresholding that measure R oT equals to dispose, then the RG value is HOLD; If measure R oT is less than the RoT thresholding of configuration, then the RG value is UP; If measure R oT is greater than the RoT thresholding of configuration, then the RG value is DOWN.
Wherein, measure R oT can obtain according to above-mentioned formula (1),
Be RoT=I
Total/ P
N=1/ (1-η
UL).
Step 104:UE adjusts the emission rate of self according to the value of carrying among the RG.
Stipulate according to agreement, as long as UE receives that the value of the RG that arbitrary non-service EDCH sub-district sends is DOWN, then represent the RoT thresholding of the measure R oT of this non-service EDCH sub-district greater than this cell configuration, this non-service cell transships, at this moment, even service EDCH sub-district and other non-service EDCH sub-district all allow UE to increase emission rate, UE also must reduce emission rate.
From the processing of this step as can be seen, when UE receives that RG value that a non-service EDCH sub-district sends is DOWN, UE downward modulation emission rate then.In this case, the service EDCH cell allocation of UE is given the not downward modulation thereupon of current permission maximum power ratio of this UE, mean promptly that this UE has wasted part of service EDCH cell allocation and given its other resources, thereby the resource that causes serving the EDCH sub-district is not utilized fully yet.
Prior art is realized in the upward grouped data scheduling by Node B, because being dispersed among each Node B, the scheduling of Node B control carries out, each Node B only understands and controls the loading condition of the sub-district of self having jurisdiction over, and the loading condition of the neighbor cell of other NodeB control is short in understanding, say nothing of and carried out certain control.In this case, may cause to make full use of finite wireless resources, reduce the problem of systematic function, thereby also reduced cell throughout the scheduling of ascending packet data.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method that realizes high-speed upward grouped data scheduling in the WCDMA system, can improve the throughput of sub-district to UE reasonable distribution resource.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of method that in broadband CDMA system WCDMA, realizes high-speed upward grouped data scheduling, this method comprises: if UE receives the relative scheduling indication RG that arbitrary non-service EDCH sub-district requires to reduce the UE emission rate, UE reduces self emission rate according to the RG from arbitrary non-service EDCH sub-district, and adopt the emission rate after reducing to send ascending packet data to service EDCH sub-district, afterwards, this method further may further comprise the steps:
A. serve the EDCH sub-district and obtain the current emission rate of UE, and judge whether the current emission rate of UE is lower than the current permission emission maximum speed of the current permission maximum power ratio correspondence of carrying among the described AG, if then enter step B; Otherwise, process ends;
B. serve the EDCH sub-district according to the current emission rate of UE, reduce the current permission maximum power ratio of this UE and be carried among the AG, be handed down to UE.
Before the requirement that UE receives arbitrary non-service EDCH sub-district reduced the RG of UE emission rate, this method also comprised:
UE strengthens the scheduling SI request that dedicated channel EDCH sub-district sends increases emission rate to service, the current permission maximum power ratio that service EDCH will distribute the sub-district is carried among the absolute scheduling indication AG and is handed down to UE, and UE sends ascending packet data according to this AG setting self emission rate to service EDCH sub-district.
Set self emission rate according to this AG after service EDCH sub-district sends ascending packet data at UE, this method also comprises: the measurement uplink noise that non-service EDCH compares the sub-district self increases factor R oT and pre-configured RoT threshold value, if certain non-service EDCH cell measurement RoT is greater than pre-configured RoT threshold value, then this non-service EDCH sub-district issues RG to UE.
The method that the EDCH sub-district of service described in the steps A obtains the current emission rate of UE is: the bit value according to the data block of the ascending packet data that receives in the unit interval calculates the current emission rate of this UE.
The method that reduces current permission maximum power ratio described in the step B is: described current permission maximum power ratio is reduced to the power ratio that equals the current emission rate correspondence of described UE.
After step B, this method also comprises: service EDCH sub-district utilizes and reduces residual resource behind the current permission maximum power ratio of described UE, improves that other has the up emission rate of permission maximum of demand UE this sub-district in.
As seen from the above technical solution, UE of the present invention sends the dispatch request that increases emission rate to service EDCH sub-district, after the current permission maximum power ratio that service EDCH sub-district will be distributed is carried among the AG and AG is handed down to UE, if UE receives the RG that arbitrary non-service EDCH sub-district requires to reduce the UE emission rate, service EDCH sub-district is by relatively self having distributed to current permission emission maximum speed and the current emission rate of UE of UE, be lower than current permission emission maximum speed if detect the current emission rate of UE, be that UE has reduced emission rate at this moment, then serve the EDCH sub-district and UE is redistributed AG, be carried at after promptly current permission maximum power ratio being turned down and be handed down to UE among the AG according to the current emission rate of UE according to the current emission rate of UE.Processing of the present invention for service EDCH sub-district, along with the reduction of the current permission maximum power ratio of distributing to UE, is also distributed to minimizing the resource of UE, has guaranteed that service EDCH sub-district shares reasonable resources to UE and distribute, and has improved the throughput of sub-district.
Description of drawings
Fig. 1 is the flow chart of existing techniques in realizing upward grouped data scheduling;
Fig. 2 is the flow chart that the present invention realizes upward grouped data scheduling.
Embodiment
Core concept of the present invention is: service EDCH sub-district is by relatively self distributing to current permission emission maximum speed and the current emission rate of UE of UE, if the current emission rate of UE is lower than the current permission emission maximum speed of distributing to UE, then serves the EDCH sub-district and UE is redistributed AG according to the current emission rate of UE.Guaranteed that service EDCH sub-district shares reasonable resources to UE and distribute, improved the throughput of sub-district.
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in more detail.
Fig. 2 is the present invention is realized upward grouped data scheduling by Node B a flow chart, suppose that service EDCH sub-district belongs to service EDCH Node B, non-service EDCH sub-district n belongs to non-service EDCH base station n, and wherein n is a positive integer, and the specific implementation of upward grouped data scheduling of the present invention may further comprise the steps:
Step 200:UE initiates the SI request to service EDCH sub-district.
Step 201～step 202: after service EDCH sub-district receives the SI request, distribute AG, and the AG of distributing is handed down to UE.
Step 203: the load estimation is carried out to RL respectively in service EDCH sub-district and non-service EDCH sub-district, and sends RG according to assessment result to UE respectively.
Step 204:UE adjusts the emission rate of self according to the value of carrying among the RG.
The specific implementation of above step 200, step 201～step 202, step 203 and step 204 respectively with prior art in step 100, step 101～step 102, step 103 and step 104 in full accord, no longer repeat here.
Step 205～step 206: the service EDCH sub-district emission rate current according to UE, determine whether to redistribute AG, if the current permission emission maximum speed that the current emission rate of UE is given UE less than service EDCH cell allocation, then reduce the current permission maximum power ratio of this UE, and the current permission maximum power ratio that will redistribute is carried at and is handed down to UE among the AG; Otherwise, the method ends flow process.
In the HSUPA technology, UE sends ascending packet data by the EDCH channel to service EDCH sub-district, the HSUPA data are that the mode with data block sends, and service EDCH sub-district can be according to the data block size that receives in the unit interval, and promptly bit value calculates the current emission rate of UE;
If the current permission emission maximum speed that the current emission rate of the UE that calculates issued to UE less than the service EDCH sub-district last time, illustrate that UE has reduced emission rate, be that some non-service cells at UE place have transshipped and sent to UE and carry the RG that value is DOWN, service EDCH sub-district reduces the current permission maximum power ratio of this UE, promptly according to the current emission rate of the UE current permission maximum power ratio that converts, and the current permission maximum power ratio after will reducing is carried at and is handed down to UE among the AG.Current permission maximum power ratio reduces with the current emission rate of UE, and is reduced to the power ratio that equals the current emission rate correspondence of UE this moment at least.Here, belong to prior art, can no longer repeat here referring to related protocol according to the convert value of current permission maximum power ratio of the current emission rate of UE.
Reduction along with the current permission maximum power ratio of described UE, just mean that also service EDCH cell allocation will reduce to the resource of this UE, therefore step 206 back service EDCH sub-district can further utilize reduce the current permission maximum power ratio of described UE after residual resource, improve in this sub-district the maximum up emission rate of other permission that demand UE is arranged, have jurisdiction over the UE that other has demand thereby residual resource is distributed to service EDCH sub-district.
Make when the emission rate of UE descends that by the inventive method service EDCH can adjust the sub-district maximum power ratio that current permission UE uses immediately, thereby rationally gives the UE Resources allocation, has improved the throughput of sub-district.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (6)
1. method that in broadband CDMA system WCDMA, realizes high-speed upward grouped data scheduling, this method comprises: if UE receives the relative scheduling indication RG that arbitrary non-service EDCH sub-district requires to reduce the UE emission rate, UE reduces self emission rate according to the RG from arbitrary non-service EDCH sub-district, and adopt the emission rate after reducing to send ascending packet data to service EDCH sub-district, afterwards, it is characterized in that this method further may further comprise the steps:
A. serve the EDCH sub-district and obtain the current emission rate of UE, and judge whether the current emission rate of UE is lower than the current permission emission maximum speed of the current permission maximum power ratio correspondence of carrying among the absolute scheduling indication AG, if then enter step B; Otherwise, process ends;
B. serve the EDCH sub-district according to the current emission rate of UE, reduce the current permission maximum power ratio of this UE and be carried among the AG, be handed down to UE.
2. method according to claim 1 is characterized in that, before the requirement that UE receives arbitrary non-service EDCH sub-district reduced the RG of UE emission rate, this method also comprised:
UE strengthens the scheduling SI request that dedicated channel EDCH sub-district sends increases emission rate to service, the current permission maximum power ratio that service EDCH will distribute the sub-district is carried among the absolute scheduling indication AG and is handed down to UE, and UE sends ascending packet data according to this AG setting self emission rate to service EDCH sub-district.
3. method according to claim 2, it is characterized in that, set self emission rate according to this AG after service EDCH sub-district sends ascending packet data at UE, this method also comprises: the measurement uplink noise that non-service EDCH compares the sub-district self increases factor R oT and pre-configured RoT threshold value, if certain non-service EDCH cell measurement RoT is greater than pre-configured RoT threshold value, then this non-service EDCH sub-district issues RG to UE.
4. method according to claim 1, it is characterized in that the method that the EDCH sub-district of service described in the steps A obtains the current emission rate of UE is: the bit value according to the data block of the ascending packet data that receives in the unit interval calculates the current emission rate of this UE.
5. method according to claim 1 is characterized in that, the method that reduces current permission maximum power ratio described in the step B is: described current permission maximum power ratio is reduced to the power ratio that equals the current emission rate correspondence of described UE.
6. method according to claim 1, it is characterized in that, after step B, this method also comprises: service EDCH sub-district utilizes and reduces residual resource behind the current permission maximum power ratio of described UE, improves that other has the up emission rate of permission maximum of demand UE this sub-district in.
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| FDD Enhanced Uplink. 3GPP TS 25.309 V6.3.0. 2005 |
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