CN101043292A - Packet scheduling method of high-speed downlink packet access system and base station using the same - Google Patents
Packet scheduling method of high-speed downlink packet access system and base station using the same Download PDFInfo
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Abstract
The invention discloses a grouping attempering method of HSDPA system that comprises: the user equipment UE whose wireless line is in desynchronizing condition is moved out of the attemper queue; the UE whose wireless line is in synchronous condition is moved into the attemper queue. The invention also discloses a base station with said method. The invention regards that whether the wireless line of UE is in synchronous condition as the condition of attempering, the UE whose channel quality is dicky is not distributed with resource, so the waste of physical resource can be avoided, the data throughput of areola is increased; at the same time, the interference of UE whose channel quality is dicky for transmitting data can be avoided.
Description
Technical field
The present invention relates to HSDPA (High Speed Downlink Packet Access, high speed downlink packet inserts) technology, the base station that relates in particular to the grouping scheduling method among a kind of HSDPA and use this method.
Background technology
In 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) R5 standard, introduced the HSDPA technology.HSDPA is by adopting AMC (Adaptive Modulation Coding, Adaptive Modulation and Coding), HARQ (Hybrid Automatic Repeat Request, the mixed automatic retransmission request), technology such as high order modulation, increase a MAC-hs (Media Access Control forHSDPA in base station side, the high speed downlink packet accessing medium access control) entity can provide data service at a high speed for the user.
Similar with power control, AMC is a kind of link adaptation techniques, by adopting more encoding rate, as 1/3,1/2,3/4 etc., with multiple modulation system, as QPSK (Quadri Phase Shift Keying, quadriphase PSK), 16QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation), modulation and coded system according to the adaptive adjustment data of link-quality, with compensation because the influence of fading that caused to received signal of channel variation, thereby improve the signal-to-noise performance of signal.General and the HARQ of AMC is used, by utilizing UE (User Equipment, subscriber equipment) Fan Kui CQI (ChannelQuality Indicator, the channel quality indication), network side can carry out flexible dispatching, when channel circumstance is good, distributes more resources to UE, adopt high code-rate and high order modulation, improve the UE data rate; When channel circumstance worsens, distribute less resource to UE, adopt low encoding rate and low-order-modulated.
When having a plurality of UE in the HSDPA sub-district, network side is dispatched UE by certain dispatching algorithm, for UE distributes physical resource, determines the data transmission rate of UE.Adopt the fast dispatch algorithm among the HSDPA, purpose is the time-varying characteristics that make full use of channel, obtains multi-user diversity gain, improves the throughput of system.The dispatching algorithm that adopts generally has training in rotation dispatching algorithm, maximum C/I (carrier/interface ratio) dispatching algorithm and direct ratio fair scheduling algorithm etc. several at present, wherein training in rotation dispatching algorithm is mainly considered the fairness of UE, do not make full use of the channel condition of different UEs, no matter the current channel quality of UE how, all obtain physical resource in turn, therefore fairness is best, but the sub-district throughput is lower; Maximum C/I dispatching algorithm then takes into full account the channel condition of UE, and the UE that channel condition is good can take resource for a long time, and the UE of bad channel conditions may can not get service for a long time, and this dispatching algorithm can obtain maximum sub-district throughput, but fairness is the poorest; The direct ratio fair scheduling algorithm is then taken into account fairness and the cell data throughput between UE, takes into full account channel quality, service priority, stand-by period of UE etc., can obtain higher cell data throughput when suitably taking into account fairness again.
In above-mentioned the whole bag of tricks, network side the relative value of parameter is all considered in the scheduling of UE based on algorithm between each UE.For example in the direct ratio fair scheduling algorithm, if the comprehensive consideration result of the channel quality to UE, service priority and a stand-by period makes it by priority scheduling, even the bad channel quality of this UE is to the degree that is difficult to finish transfer of data, the base station still can repeatedly repeat to send data to this UE, causes the waste of bandwidth and cell data throughput to reduce.For another example in maximum C/I dispatching algorithm, if the only surplus UE in sub-district, no matter then its bad channel quality is to which kind of degree, the base station still can be for it carries out scheduling of resource, thereby causes the interference to other UE.
Summary of the invention
What the present invention will solve is only to dispatch according to the parameter relative value between UE in the prior art to cause the wasting of resources and disturb the problem that increases.
The grouping scheduling method of HSDPA of the present invention system may further comprise the steps:
The user equipment (UE) that Radio Link is entered desynchronizing state shifts out scheduling queue;
The UE that Radio Link is entered synchronous regime adds scheduling queue;
UE in the scheduling queue is carried out scheduling of resource.
Preferably, described method also comprises: after the UE that initially sets up Radio Link enters synchronous regime, put it into scheduling queue.
Preferably, described method also comprises: the state of monitoring UE up-link wireless link.
Preferably, the state of described up-link wireless link obtains by the signal quality of the up own coding composite transport channel CCTrCH of monitoring UE.
Preferably, describedly UE in the scheduling queue is carried out scheduling of resource be specially: the UE in the scheduling queue is dispatched according to training in rotation dispatching algorithm, maximum signal to noise ratio C/I dispatching algorithm or direct ratio fair scheduling algorithm.
The invention provides the grouping scheduling method of another kind of HSDPA system, may further comprise the steps:
Judge whether UE to be scheduled is in the wireless link synchronization state, if then this UE is carried out scheduling of resource; If not, then this UE is not carried out scheduling of resource.
Preferably, whether described UE Radio Link is in the signal quality acquisition of synchronous regime by the up CCTrCH channel of monitoring UE.
The present invention also provides the base station in a kind of HSDPA system, comprises Link State unit and scheduling unit, wherein:
The Link State unit is used for carrying out the monitoring wireless link state of UE;
Scheduling unit carries out scheduling of resource according to the wireless chaining status of UE to the UE that is in synchronous regime, and the UE that is in desynchronizing state and initial condition is not dispatched.
Preferably, described scheduling unit comprises scheduling queue module and scheduling of resource module, wherein:
The scheduling queue module is used for the maintenance schedule formation, comprises that the UE that Radio Link is entered desynchronizing state shifts out scheduling queue and the UE that Radio Link enters synchronous regime is added scheduling queue;
The scheduling of resource module is used for the UE in the described scheduling queue is carried out scheduling of resource.
Preferably, described maintenance schedule formation also comprises: after the UE that initially sets up Radio Link enters synchronous regime, it is added scheduling queue.
The present invention is in synchronous regime as the condition that it is dispatched with the Radio Link of UE, no longer is the abominable UE Resources allocation of channel quality, has avoided the waste to physical resource, has improved the data throughout of sub-district; The interference that causes in the time of can also avoiding that simultaneously the abominable UE of channel quality carried out transfer of data.
Description of drawings
Fig. 1 is the flow chart of grouping scheduling method embodiment one of the present invention;
Fig. 2 is the flow chart of grouping scheduling method embodiment two of the present invention;
Fig. 3 is the structural representation of base station of the present invention.
Embodiment
For fear of to bad channel quality to the UE transmission data that are difficult to finish proper communication, can a condition of carrying out scheduling of resource be set for UE, the UE that satisfies this condition just can finish transfer of data.Can not satisfy the UE of this condition to channel quality, network side is not dispatched it, even because this moment this UE is dispatched in fact also basically can't efficient communication, can not influence the service that UE obtains so this condition is set.
Use transmission channel HS-DSCH (High Speed Downlink Shared Channel among the HSDPA, high speed descending sharing channel) carries high-rise PDU (Protocol Data Unit, protocol Data Unit), transmission channel HS-DSCH corresponding physical channel is HS-PDSCH (High Speed PhysicalDownlink Shared Channel, a High-Speed Physical Downlink Shared Channel).In order to carry out fast dispatch, in the base station, introduce entity MAC-hs, also introduce down control channel HS-SCCH (SharedControl Channel for HS-DSCH, the shared control channel of high speed descending sharing channel) and ascending control channel simultaneously and be used for the mutual of base station and UE control information.Ascending control channel is at TD-SCDMA (TimeDivision Synchronous Code Division Multiple Access, TD SDMA) in the system is HS-SICH (Shared Information Channel for HS-DSCH, the shared information channel of high speed descending sharing channel), at WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) in the system is HS-DPCCH (High Speed Dedicated Physical ControlChannel, High-Speed Dedicated Physical Control Channel), the CQI of UE generation transfers to network side on ascending control channel.
Existing dispatching algorithm adopts the parameter of CQI as the reaction channel quality usually.CQI is that UE generates according to the measurement result to HS-PDSCH, and relevant with the resource allocation status of HS-PDSCH channel.When UE did not obtain the resource allocation of network side in a period of time, its CQI might can not the current channel quality of real time reaction UE.And in some dispatching algorithms, for priority scheduling that the consideration of fairness this UE this moment is more had an opportunity to obtain.Therefore, CQI is not suitable as whether measurement carries out scheduling of resource to UE parameter.
Link with one of network side foundation for UE, when using high speed shared channels HS-DSCH to carry out downlink data transmission, also there is special-purpose CCTrCH (Coded CompositeTransport Channel in up-downgoing, coded composite transport channel), respectively by up/descending DPCH (DedicatedPhysical Channel, DPCH) carrying, wherein descending DPCH can be used for transmitting high-level signaling and transmission up DPCH power control of control and synchronous command word TPC and SS (SynchronizationShift, simultaneous bias).
In TD-SCDMA system and WCDMA system, between UE and network side dedicated link set up and the maintenance process in, in order to monitor link-quality in real time and to keep air interface synchronization, base station and UE also will carry out the monitoring of wireless chaining status when carrying out transfer of data.For a link, from setting up, remaining to release, generally may experience three states, i.e. initial condition, synchronous regime and desynchronizing state, the state of link is generally changed between these three states.
After Radio Link was set up, UE and network side were all monitored the wireless chaining status of air interface.For network side, the state of up-link wireless link is mainly judged by the quality of reception of monitoring up CCTrCH; For UE, the state of down wireless link is mainly judged by the quality of reception of monitoring descending CCTrCH.When Radio Link is in desynchronizing state, mean that the channel quality of this UE quite worsens, be difficult to finish the demodulation of communication data.
For a UE who supports HSDPA, after setting up service chaining with network side, network side is also carrying out the mutual of other data and/or signaling on the special-purpose CCTrCH of the up-downgoing of the Radio Link related with this UE when UE being dispatched, distribute shared channel resources to carry out transfer of data for UE.Network side and UE side also will be monitored the quality of up-downgoing CCTrCH respectively in data interaction, judge the residing state of uplink downlink.Therefore, in case the quality of CCTrCH drops to the setting degree, Radio Link can change desynchronizing state rapidly into.
As seen, whether the channel quality that wireless chaining status can immediate reaction UE is in the state that can finish data communication, among the present invention with its condition of this UE being dispatched as whether.
Among the present invention the flow process of grouping scheduling method embodiment one as shown in Figure 1, at step S110, UE and network side are set up and links, network side is to UE assigned with dedicated channel resource, and foundation HSDPA signaling link therebetween.The present invention of this step is same as the prior art.
At step S120, monitor the state of each UE Radio Link.The state of Radio Link comprises initial condition, synchronous regime and desynchronizing state, is in initial condition in the starting stage of link establishment.
At step S130, judge whether that the Radio Link of UE enters synchronous regime, if, execution in step S140; If not, change step S150.
At step S140, the UE that Radio Link is entered synchronous regime adds scheduling queue.To just setting up Radio Link, being in the UE of initial condition, after transferring synchronous regime to, its state joins in the scheduling queue in this step.
At step S150, judge whether that the Radio Link of UE enters desynchronizing state, if, execution in step S160; If not, change step S170.
At step S160, the UE that Radio Link is entered desynchronizing state shifts out scheduling queue.
At step S170, the UE in the scheduling queue is carried out scheduling of resource.Identical in the process of the UE in the scheduling queue being carried out scheduling of resource and the prior art, and can adopt various dispatching algorithms, comprise aforesaid training in rotation dispatching algorithm, maximum signal to noise ratio C/I dispatching algorithm or direct ratio fair scheduling algorithm.
In the present embodiment, at the initial establishment stage of link, if up special-purpose CCTrCH does not enter synchronous regime, then base station MAC-hs not for this UE distributes physical resource, does not use HSDPA to send data to this UE when scheduling; After link entered synchronous regime from the starting stage, the MAC-hs entity added scheduling queue with this UE, began scheduling by normal dispatching algorithm, distributed for this UE and shared physical channel resources; In link maintenance process, if detecting up special-purpose CCTrCH, network side enters desynchronizing state, then notify MAC-hs, the UE that up special-purpose CCTrCH is entered desynchronizing state shifts out scheduling queue, this UE is not dispatched when HSDPA dispatches; Detect this UE up to the base station on up special-purpose CCTrCH and enter synchronous regime again, MAC-hs adds scheduling queue with this UE again, restarts this UE is dispatched by dispatching algorithm, distributes and shares physical channel resources.
Embodiment one is a preferred implementation of the present invention, and by the maintenance schedule formation, the UE in the maintenance scheduling queue is in the synchronous regime of Radio Link and avoids being difficult to finish the UE Resources allocation of transfer of data.In fact, for various scheduling modes, because network side has had the real-time status of its link in the prior art, therefore as long as before certain UE of scheduling, the current state of its link is checked, only the UE that Radio Link is in synchronous regime dispatches, the UE that is in asynchronous regime is not carried out scheduling of resource, can realize the present invention equally.Still this execution mode is described among the embodiment two so that the UE in the scheduling queue is scheduling to example.
The flow process of grouping scheduling method embodiment two as shown in Figure 2, at step S210, UE and network side are set up and links, network side is to UE assigned with dedicated channel resource, and foundation HSDPA signaling link therebetween.
At step S220, UE is added scheduling queue.With identical in the prior art, the UE that will set up in the present embodiment behind the Radio Link adds scheduling queue, and this moment, this UE still may be in initial condition.
At step S230, determine the UE to be dispatched in the scheduling queue.
At step S240, judge to wait whether the Radio Link of dispatching UE is in synchronous regime, if, execution in step S250; If not, change step S260.
At step S250, this UE is carried out scheduling of resource.With identical among the embodiment one, can adopt various dispatching algorithms that it is carried out scheduling of resource.
At step S260, judge whether untreated UE is arranged in the scheduling queue, if, change step S230, handle next UE to be scheduled; If not, this finishing scheduling.
In the HSDPA system, mainly finish the scheduling of UE by the base station.Figure 3 shows that the structural representation of using base station of the present invention, scheduling unit 320 comprises scheduling queue module 321 and scheduling of resource module 322, and wherein scheduling queue module 321 is connected to Link State unit 310 and scheduling of resource module 322 respectively.
The wireless chaining status of the 310 couples of UE in Link State unit is monitored, scheduling unit 320 is learnt the current Link State of UE by Link State unit 310, only the UE that is in synchronous regime is carried out scheduling of resource, and the UE that is in initial condition and desynchronizing state is not dispatched.
During dispatching method in adopting previous embodiment one, comprise scheduling queue module 321 and scheduling of resource module 322 in the scheduling unit 320.Scheduling of resource module 322 is carried out scheduling of resource according to certain dispatching algorithm to the UE in the scheduling queue; The scheduling queue that scheduling queue module 321 maintenance resources scheduler modules 322 are used, when when Link State unit 310 learns that the Radio Link of some UE enters synchronous regime, scheduling queue module 321 joins these UE in the scheduling queue; When learning that some UE enters desynchronizing state, scheduling queue module 321 shifts out scheduling queue with these UE.
To just setting up the UE of Radio Link, when when Link State unit 310 learns that its Link State enters into synchronous regime, scheduling queue module 321 joins it in scheduling queue.
The present invention is when dispatching HSDPA user, taken into full account the synchronous desynchronizing state of UE Radio Link, the up-link wireless link is in the UE of desynchronizing state, not putting into the HSDPA scheduling queue dispatches, the UE Resources allocation that can avoid the MAC-hs scheduling entity that channel quality is extremely worsened like this, help simplifying the HSDPA dispatching algorithm, improve the cell data throughput.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (10)
1. the grouping scheduling method of a high-speed downlink packet access HSDPA system is characterized in that, may further comprise the steps:
The user equipment (UE) that Radio Link is entered desynchronizing state shifts out scheduling queue;
The UE that Radio Link is entered synchronous regime adds scheduling queue;
UE in the scheduling queue is carried out scheduling of resource.
2. the grouping scheduling method of HSDPA system according to claim 1 is characterized in that described method also comprises: after the UE that initially sets up Radio Link enters synchronous regime, put it into scheduling queue.
3. the grouping scheduling method of HSDPA system as claimed in claim 1 or 2 is characterized in that described method also comprises: the state of monitoring UE up-link wireless link.
4. as the grouping scheduling method of HSDPA system as described in the claim 3, it is characterized in that: the state of described up-link wireless link obtains by the signal quality of the up own coding composite transport channel CCTrCH of monitoring UE.
5. the grouping scheduling method of HSDPA system according to claim 1 is characterized in that: describedly UE in the scheduling queue is carried out scheduling of resource be specially: according to training in rotation dispatching algorithm, maximum signal to noise ratio C/I dispatching algorithm or direct ratio fair scheduling algorithm the UE in the scheduling queue is dispatched.
6. the grouping scheduling method of a HSDPA system is characterized in that, may further comprise the steps:
Judge whether UE to be scheduled is in the wireless link synchronization state, if then this UE is carried out scheduling of resource; If not, then this UE is not carried out scheduling of resource.
7. as the grouping scheduling method of HSDPA system as described in the claim 6, it is characterized in that: whether described UE Radio Link is in the signal quality of synchronous regime by the up CCTrCH channel of monitoring UE obtains.
8. the base station in the HSDPA system is characterized in that, comprises Link State unit and scheduling unit, wherein:
The Link State unit is used for carrying out the monitoring wireless link state of UE;
Scheduling unit carries out scheduling of resource according to the wireless chaining status of UE to the UE that is in synchronous regime, and the UE that is in desynchronizing state and initial condition is not dispatched.
9. as the base station in the HSDPA system as described in the claim 8, it is characterized in that described scheduling unit comprises scheduling queue module and scheduling of resource module, wherein:
The scheduling queue module is used for the maintenance schedule formation, comprises that the UE that Radio Link is entered desynchronizing state shifts out scheduling queue and the UE that Radio Link enters synchronous regime is added scheduling queue;
The scheduling of resource module is used for the UE in the described scheduling queue is carried out scheduling of resource.
10. as the base station in the HSDPA system as described in the claim 9, it is characterized in that described maintenance schedule formation also comprises: after the UE that initially sets up Radio Link enters synchronous regime, it is added scheduling queue.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101400132B (en) * | 2007-09-28 | 2010-08-25 | 大唐移动通信设备有限公司 | Method and apparatus for sharing control channel resource distribution |
| CN101369824B (en) * | 2008-10-21 | 2012-03-28 | 北京北方烽火科技有限公司 | Base station step-out detection apparatus and method |
| CN114780000A (en) * | 2022-03-18 | 2022-07-22 | 江苏红网技术股份有限公司 | Multipath large-scale real-time data job scheduling system and method thereof |
| WO2023005239A1 (en) * | 2021-07-29 | 2023-02-02 | 中兴通讯股份有限公司 | Ephemeris information acquisition method, indication method, communication node, and storage medium |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170394C (en) * | 2001-10-09 | 2004-10-06 | 华为技术有限公司 | Descending grouped data transmission method |
| FI20031200A0 (en) * | 2003-08-26 | 2003-08-26 | Nokia Corp | Procedure and base station for controlling link matching and packet time setting in an HSDPA radio system |
| CN100433604C (en) * | 2003-12-03 | 2008-11-12 | 上海贝尔阿尔卡特股份有限公司 | Method of realizing dynamic quickly regulating for HSDPA system |
| CN1317919C (en) * | 2004-06-14 | 2007-05-23 | 华为技术有限公司 | Synchronous maintainment of active set in CDMA system |
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2006
- 2006-03-24 CN CN2006100661781A patent/CN101043292B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101400132B (en) * | 2007-09-28 | 2010-08-25 | 大唐移动通信设备有限公司 | Method and apparatus for sharing control channel resource distribution |
| CN101369824B (en) * | 2008-10-21 | 2012-03-28 | 北京北方烽火科技有限公司 | Base station step-out detection apparatus and method |
| WO2023005239A1 (en) * | 2021-07-29 | 2023-02-02 | 中兴通讯股份有限公司 | Ephemeris information acquisition method, indication method, communication node, and storage medium |
| CN114780000A (en) * | 2022-03-18 | 2022-07-22 | 江苏红网技术股份有限公司 | Multipath large-scale real-time data job scheduling system and method thereof |
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