CN101378541B - Method for distributing dynamic channel of multimedia broadcast and multicast business - Google Patents
Method for distributing dynamic channel of multimedia broadcast and multicast business Download PDFInfo
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- CN101378541B CN101378541B CN2007101480218A CN200710148021A CN101378541B CN 101378541 B CN101378541 B CN 101378541B CN 2007101480218 A CN2007101480218 A CN 2007101480218A CN 200710148021 A CN200710148021 A CN 200710148021A CN 101378541 B CN101378541 B CN 101378541B
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Abstract
The invention discloses a dynamic channel distributing method of a multimedia-broadcasting multicast service. The distributing method comprises the steps that: a radio network controller (RNC) configures a reserved radio resource pool for the multimedia-broadcasting multicast service (MBMS), a distributable unit is marked in a channelization-code distribution table corresponding to the radio resource pool, and a service regional mark of the MBMS occupying the distributable unit and corresponding to the distributable unit is stored in the channelization-code distribution table; the MBMS sends a request message about conversation initiation to the RNC; after receiving the request message, the RNC searches the channelization-code distribution table for a spare distributable unit, finds out an occupied distributable unit of which the corresponding service regional mark has no intersection with the service regional mark of a current MBMS, and brings the spare distributable unit and the occupied distributable unit into a distributable set; and according to the distributable set, the RNC distributes resource for the current MBMS from the reserved radio resource pool. The dynamic channel distributing method has high radio resource utilization rate.
Description
Technical field
The present invention relates to a kind of distribution method of wireless communication field resource, relate in particular to a kind of in 3-G (Generation Three mobile communication system) TD-SCDMA, be multimedia broadcast multi-broadcasting business (MultimediaBroadcast/Multicast Service, MBMS) method of dynamic assignment channel.
Background technology
Along with the commercialization of 3-G (Generation Three mobile communication system), mobile TV service (Mobile TV) more and more receives the concern of operator at present.In the TD-SCDMA system, provide multimedia broadcasting and multicast service also to become an active demand.Organize the agreement of 3GPP according to global standardsization to the MBMS business, the MBMS business is at UTRAN (Universal Terrestrial Radio Access Network, universal land radio access web) and UE (User Equipment, dual mode is arranged: PTM (Point-to-Multipoint when transmitting subscriber equipment), point-to-multipoint) mode and PTP (Point-to-Point, point-to-point) mode.The PTM mode uses common logical MTCH (MBMS PTM Traffic Channel, point multipoint message traffic channel) that all are added multicast service or the interested UE of broadcasting service is sent data; The PTP mode then uses dedicated logical channel DTCH (Dedicated Traffic Channel) that single UE is sent business datum.When adding multicast service or when big, using the PTM mode can effectively utilize wireless network resource undoubtedly, cut operating costs widely to the interested UE quantity of broadcasting service.
Can there be serious co-channel interference when in the TD-SCDMA multi-carrier frequency system, providing MBMS professional.Logic channel MTCH under the MBMS PTM mode is mapped to transmission channel FACH (ForwardAccess Channel, forward access channel), and finally be carried on SCCPCH (Secondary CommonControl Physical Channel, S-CCPCH Secondary Common Control Physical Channel).Public physic channel SCCPCH uses omni-directional antenna transmission.While MBMS business is the mobile TV service of high speed normally, takies many code channels.Like this, when using the SCCPCH channel of omni-directional antenna transmission to carry out the continuous covering of MBMS business, can cause serious minizone co-channel interference, make service quality can not get ensureing in many sub-districts.
The problem of co-channel interference of minizone during for the solution identical networking, a kind of scheme are that all sub-districts use same carrier, time slot, channel code, scrambler and basic midamble code (Midamble Code) to send the wireless signal of identical MBMS business channels.Under above-mentioned pattern, UE can be considered as multipath signal with the signal that comes from different base station, makes to obtain big performance gain aspect the receiving broadcast service signal, has improved the service quality of MBMS business.This scheme can improve the broadcasting service availability of frequency spectrum, and the realization of UE side is also comparatively simple simultaneously.
Usually, a MBMS business has a professional numbering, and an identical service area (Service Area, SA) numbering are used in all sub-districts in the zone that this MBMS business is covered.To the MBMS business of given area numbering and professional numbering, identical Radio Resource is used in the sub-district that such scheme necessarily requires all to belong to this given area numbering, comprises frequency, time slot, channel code, scrambler and basic midamble code.So the independently dynamic resource allocation method of traditional cell-level based on sub-district physical resource situation just no longer is applicable to the MBMS business.
Under above-mentioned MBMS wireless signal sending mode,, need to revise radio network controller (Radio NetworkController, RNC) standard interface protocol between of existing 3GPP if carry out fully dynamic allocation of radio resources for the MBMS business.If keep existing 3GPP agreement constant, then can only take static resource allocation method.
In the resource allocation method of static state, if take Radio Resources such as professional numbering of MBMS and frequency, time slot form one to one, not only make universal land radio access web (UTRAN) be subject to very much core net (Core Network, CN) to the configuration of MBMS business, on wireless resource allocation, also seem very inflexible and inefficient simultaneously.Because MBMS business may have its specific broadcast time section, also only during session (Session), just can take valuable Radio Resource simultaneously.The different sessions of a MBMS business may be used different RABs, and (as maximum traffic rate, and different MBMS business have different service areas and cover for Radio AccessBearer, RAB) parameter.For certain specific MBMS traffic assignments Radio Resource, then this part resource uses can't be again for the sub-district beyond the service area of this MBMS business, cause waste of radio resources.Generally speaking, existing technology can't provide not only unified but also flexible and efficient radio resource management method for the MBMS business.
Summary of the invention
Technical problem to be solved by this invention is to provide the dynamic channel assignment method of a kind of multimedia broadcast multicast (MBMS) business, be MBMS traffic assignments Radio Resource, make described distribution method have unified and flexible and efficient characteristics, improve wireless resource utility efficiency.
In order to solve the problems of the technologies described above, the invention provides a kind of dynamic channel assignment method of multimedia broadcast multi-broadcasting business, said method comprising the steps of:
(1) radio network controller (RNC) is that multimedia broadcast multicast MBMS business configuration is reserved the Radio Resource pond, but in the channelization code allocation table of described Radio Resource pond correspondence, identify allocation units, but but and in the channelization code allocation table, preserve and the corresponding service area sign that takies the MBMS business of these allocation units of described allocation units;
(2) the MBMS business begins request message to RNC transmission session, comprises the service area sign and the RAB parameter of current MBMS business in the described request message;
(3) after RNC receives described request message, obtain the service area sign and the RAB parameter of current MBMS business in the message, afterwards, but find out allocation units idle in the channelization code allocation table, and find out and take but but there are not the allocation units of common factor in its corresponding service area sign and the service area sign of current MBMS business, include in and can distribute set;
(4) RNC is according to described RAB parameter with describedly distribute set, it from the reserved radio resource pond current MBMS traffic assignments resource, radio bearer is set up for all sub-districts in the service area scope of current MBMS business in the success back, and it is the service area of current MBMS business sign is kept in the channelization code allocation table, but corresponding with shared allocation units.
Further, described method is further comprising the steps of:
(5) when the Radio Resource of MBMS business discharges, but but RNC deletes the service area sign of the MBMS business of pairing these allocation units of release of d/d allocation units in the channelization code allocation table.
Further, RNC distributes set according to described in the step (4), from the reserved radio resource pond for current MBMS traffic assignments resource according to priority order carry out, comprising: frequency priority allocation order, time slot priority allocation order or channel code priority allocation order.
Further, the Radio Resource pond comprises the set that combination constituted such as frequency, time slot and channel code described in the step (1).
Further, step also comprises in (1): the service area sign correlation table between the RNC configuration different business zone identifies between the service area sign of different MBMS business whether have common factor.
Further, the common factor between the described service area sign is that geographical going up exists the common zone that covers.
Further, step (1) but but described in the channelization code allocation table, preserve and the corresponding service area sign that takies the MBMS business of these allocation units of described allocation units, comprise: safeguard the set of a service area sign but RNC is each allocation units in the channelization code allocation table of MBMS, but the set of described service area sign comprises the service area sign of all MBMS business that take these allocation units; Accordingly,
Step (3) but in find out in the channelization code allocation table idle allocation units, comprising: if described service area identification sets is combined into sky, but then described allocation units be the free time.
Further, step (1) but but described in the channelization code allocation table, preserve and the corresponding service area sign that takies the MBMS business of these allocation units of described allocation units, comprise: safeguard the set of a service area sign but RNC is each allocation units in the channelization code allocation table of MBMS, but the set of described service area sign comprises the service area sign of all MBMS business that take these allocation units; Accordingly,
Step (5) but but in RNC in the channelization code allocation table, delete the service area sign of the MBMS business of pairing these allocation units of release of d/d allocation units, comprising: but the service area of the described MBMS business of deletion identifies in the service area sign set of d/d allocation units.
Adopt the method for the invention, can guarantee in all sub-districts of a given service area SA to be Radio Resources such as the unified frequency of MBMS traffic assignments, time slot and channel code, realize the same wireless signal transmission of MBMS business.Can set up simultaneously the fixed correspondence of MBMS traffic ID and resource again, only need be according to " MBMS SESSION START " message content, dynamic assignment resource as required when the MBMS service conversation begins.The present invention compares the fixed allocation of complete static state, has good flexibility, the wireless resource utility efficiency height.
Description of drawings
Fig. 1 is a MBMS service area correlation schematic diagram of the present invention.
Fig. 2 is the dynamic channel assignment method flow chart of MBMS business of the present invention.
Fig. 3 is the dynamic channel assignment method flow chart of application example MBMS business of the present invention.
Embodiment
The present invention is by at radio network controller being multimedia broadcast multi-broadcasting business configure reserved Radio Resource pond, in the MBMS business when RNC sends session and begins request message, but RNC finds out idle allocation units from the channelization code allocation table in reserved radio resource pond, and find out and take but but there are not the allocation units of common factor in its corresponding service area sign and the service area sign of current MBMS business, include in and can distribute set, but be combined into current MBMS traffic assignments resource according to allocation set.
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail:
With reference to shown in Figure 1, be MBMS service area correlation schematic diagram of the present invention.Service area 1 (SA#1) has comprised service area 2 (SA#2), service area 3 (SA#3), service area 4 (SA#4), so service area 1 exists and occurs simultaneously with service area 2, service area 3, service area 4; And there is common factor in service area 2 with service area 4.The so-called common factor is meant that there is the common zone that covers in geographical going up.
With reference to shown in Figure 2, be the dynamic channel assignment method flow chart of MBMS business of the present invention, described method comprises the following steps:
Step 201: in RNC, reserve the Radio Resource pond, comprise the set that combination constituted such as frequency, time slot and channel code for the MBMS configuring static.Simultaneously dispose correlation table between the different SA at RNC, this table is used for identifying between two different SA whether have common factor;
In the wireless communication system of code division multiple access, but being each allocation units in the channelization code allocation table of MBMS, RNC safeguards a SA set, this SA set comprises the SA sign of all specific MBMS business that take these allocation units.If this SA set represents then that for empty these allocation units are not taken by any MBMS business;
Step 202:MBMS business sends session to RNC and begins request message, comprises the service area sign and the RAB parameter of current MBMS business in the described request message;
Step 203: when RNC received " MBMS SESSIONSTART " message of specific MBMS business of CN, RNC obtained SA sign and the RAB parameter in the message.But at first find out the free time in the MBMS channelization code allocation table, do not have occupied allocation units, they are included in and can distribute in the set.Find out again and be assigned with in the MBMS channelization code allocation table but do not have the allocation units that the SA of common factor is arranged with the SA of current MBMS business to be allocated in its SA set, this part allocation units is also included in can be distributed set;
Step 204: distribute in the set above-mentioned, RNC is with certain priority order Resources allocation.Described priority order comprises frequency priority allocation order, time slot priority allocation order and channelization code allocation order.If be allocated successfully, for setting up radio bearer in the sub-district of specific MBMS business in its SA scope.And the SA that adds specific MBMS business in the SA of the allocation units that are assigned with set identifies;
Step 205: when the Radio Resource of specific MBMS business discharges, the SA sign of this specific MBMS business of deletion in the SA of d/d allocation units set.
Come technical solution of the present invention is carried out exemplary explanation below by the example in the concrete application:
With reference to shown in Figure 3, be the dynamic channel assignment method flow chart of application example MBMS business of the present invention.The method of this example may further comprise the steps:
Step 301: in RNC, reserve the Radio Resource pond, comprise the set that combination constituted such as frequency, time slot and channel code for the MBMS configuring static.For example: the configuration of MBMS reserved resource can be as shown in table 1,
Table 1: static reservations resource distribution table
| The frequency numbering | Time-gap number | The downgoing channelized codes numbering |
| fx | T4 | 1-16 |
| fx | T5 | 1-16 |
| fy | T4 | 1-16 |
Step 302: dispose correlation table between the different SA at RNC, this table is used for identifying whether have common factor (there is the common zone that covers in promptly geographical going up) between two different SA.In conjunction with the accompanying drawings 1, the tabulation of SA correlation can be as table 2:
The tabulation of table 2:SA correlation
| SA#1 | SA#2 | SA#3 | SA#4 | |
| SA#1 | 1 | 1 | 1 | 1 |
| SA#2 | 1 | 1 | 0 | 1 |
| SA#3 | 1 | 0 | 1 | 0 |
| SA#4 | 1 | 1 | 0 | 1 |
Annotate: 1-has common factor, and there is not common factor in 0-.
Safeguard a SA set but step 303:RNC is each allocation units in the channelization code allocation table of MBMS, this SA set comprises the SA sign of all specific MBMS business that take these allocation units.If this SA set represents then that for empty these allocation units are not taken by any MBMS business.This SA is integrated in the real system and can preserves with the form of bitmap.Associative list 1, MBMS channelization code allocation table can be as tables 3:
Table 3:MBMS channelization code allocation table
Step 304: when RNC received " MBMS SESSIONSTART " message of specific MBMS business of CN, RNC obtained SA sign and the RAB parameter in the message.For example, current to need the SA of the MBMS business of distributing radio resource be SA#3, and required code channel resource is 8.
Step 305: but find out in the MBMS channelization code allocation table idle, do not have occupied allocation units, they are included in and can distribute in the set.Table 3 for example is labeled as idle Resource Unit with all and includes in and can distribute set, is about to all channel codes among the time slot T4 of the time slot T5 of carrier frequency fx and carrier frequency fy and includes in and can distribute set.
Step 306: find out and be assigned with in the MBMS channelization code allocation table but do not have the allocation units that the SA of common factor is arranged with the SA of current MBMS business to be allocated in its SA set, this part allocation units is also included in can be distributed set.Table 3 for example, because the SA of the channel code 9-16 of the time slot T4 of carrier frequency fx set is SA#2, and there are not common factor in SA#2 and SA#3, can distribute set so this part allocation units also included in.
Step 307: distribute in the set above-mentioned, RNC is with certain priority order Resources allocation.Described priority order comprises frequency priority allocation order, time slot priority allocation order and channelization code allocation order.Table 3 for example, the priority allocation order of carrier frequency be fx, fy}, the priority allocation order of time slot be T4, T5}, the allowable resource of priority allocation carrier frequency fx then, promptly the channel code 9-16 of the time slot T4 of carrier frequency fx is assigned to current MBMS business.
Step 308: judging whether to be allocated successfully, is execution in step 309 then, otherwise execution in step 312.
Step 309: if be allocated successfully, for setting up radio bearer in the sub-district of specific MBMS business in its SA scope.And the SA that adds specific MBMS business in the SA of the allocation units that are assigned with set identifies.For example table 3 is updated to table 4 as follows:
Table 4:MBMS channelization code allocation table (renewal)
Step 310: judging whether to discharge Radio Resource, is execution in step 311 then, otherwise execution in step 310;
Step 311: the SA sign of this specific MBMS business of deletion in the SA of d/d allocation units set, finish.
Step 312: return the distribution failed message.
The dynamic channel assignment method of multimedia broadcast multi-broadcasting business provided by the invention, distributing radio resource dynamically, it is flexible to have the method for salary distribution, the characteristics that wireless resource utility efficiency is high.
Certainly, above-mentioned specific embodiment is not the further qualification to technical solution of the present invention, and any those of ordinary skill in the art replaced or corresponding deformation the technology of the present invention feature being equal to of being done, still within protection scope of the present invention.
Claims (7)
1. the dynamic channel assignment method of a multimedia broadcast multi-broadcasting business is characterized in that, said method comprising the steps of:
(1) radio network controller (RNC) is that multimedia broadcast multicast MBMS business configuration is reserved the Radio Resource pond, but in the channelization code allocation table of described Radio Resource pond correspondence, identify allocation units, but but and in the channelization code allocation table, preserve and the corresponding service area sign that takies the MBMS business of these allocation units of described allocation units;
(2) the MBMS business begins request message to RNC transmission session, comprises the service area sign and the RAB parameter of current MBMS business in the described request message;
(3) after RNC receives described request message, obtain the service area sign and the RAB parameter of current MBMS business in the message, afterwards, but find out allocation units idle in the channelization code allocation table, and find out and take but but there are not the allocation units of common factor in its corresponding service area sign and the service area sign of current MBMS business, include in and can distribute set; Common factor between the service area sign is that geographical going up exists the common zone that covers;
(4) RNC is according to described RAB parameter with describedly distribute set, it from the reserved radio resource pond current MBMS traffic assignments resource, radio bearer is set up for all sub-districts in the service area scope of current MBMS business in the success back, and it is the service area of current MBMS business sign is kept in the channelization code allocation table, but corresponding with shared allocation units.
2. the method for claim 1 is characterized in that, described method is further comprising the steps of:
(5) when the Radio Resource of MBMS business discharges, but but RNC deletes the service area sign of the MBMS business of pairing these allocation units of release of d/d allocation units in the channelization code allocation table.
3. the method for claim 1, it is characterized in that, RNC distributes set according to described in the step (4), from the reserved radio resource pond for current MBMS traffic assignments resource according to priority order carry out, comprising: frequency priority allocation order, time slot priority allocation order or channel code priority allocation order.
4. the method for claim 1 is characterized in that, the Radio Resource pond comprises frequency, the set that time slot and channel code constituted described in the step (1).
5. the method for claim 1 is characterized in that, step also comprises in (1): the service area sign correlation table between the RNC configuration different business zone identifies between the service area sign of different MBMS business whether have common factor.
6. the method for claim 1, it is characterized in that, step (1) but but described in the channelization code allocation table, preserve and the corresponding service area sign that takies the MBMS business of these allocation units of described allocation units, comprise: safeguard the set of a service area sign but RNC is each allocation units in the channelization code allocation table of MBMS, but the set of described service area sign comprises the service area sign of all MBMS business that take these allocation units; Accordingly,
Step (3) but in find out in the channelization code allocation table idle allocation units, comprising: if described service area identification sets is combined into sky, but then described allocation units be the free time.
7. method as claimed in claim 2, it is characterized in that, step (1) but but described in the channelization code allocation table, preserve and the corresponding service area sign that takies the MBMS business of these allocation units of described allocation units, comprise: safeguard the set of a service area sign but RNC is each allocation units in the channelization code allocation table of MBMS, but the set of described service area sign comprises the service area sign of all MBMS business that take these allocation units; Accordingly,
Step (5) but but in RNC in the channelization code allocation table, delete the service area sign of the MBMS business of pairing these allocation units of release of d/d allocation units, comprising: but the service area of the described MBMS business of deletion identifies in the service area sign set of d/d allocation units.
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| CN101702789B (en) * | 2009-10-20 | 2014-11-05 | 中兴通讯股份有限公司 | Multimedia broadcast/multicast service control method and device thereof |
| EP2668802B1 (en) * | 2011-01-27 | 2016-12-07 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for allocating transport channels for multimedia broadcast multicast service |
| CN105592551B (en) * | 2015-08-10 | 2019-06-07 | 新华三技术有限公司 | A kind of method for channel allocation and device |
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| CN1523798A (en) * | 2003-02-17 | 2004-08-25 | ��������ͨ�ż����о�����˾ | Method for effective updating of MBMS business service parameter in GGSN, SGSN and RNC |
| WO2005013514A1 (en) * | 2003-07-31 | 2005-02-10 | Samsung Electronics Co., Ltd. | Method of providing multiple qos for mbms service |
| CN1722890A (en) * | 2004-07-14 | 2006-01-18 | 中兴通讯股份有限公司 | A method of dynamic channel allocation for TD-SCDMA communication system |
| CN1863401A (en) * | 2006-03-14 | 2006-11-15 | 华为技术有限公司 | Method of sending mobile station address identification message and allocating identification for mobile station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1523798A (en) * | 2003-02-17 | 2004-08-25 | ��������ͨ�ż����о�����˾ | Method for effective updating of MBMS business service parameter in GGSN, SGSN and RNC |
| WO2005013514A1 (en) * | 2003-07-31 | 2005-02-10 | Samsung Electronics Co., Ltd. | Method of providing multiple qos for mbms service |
| CN1722890A (en) * | 2004-07-14 | 2006-01-18 | 中兴通讯股份有限公司 | A method of dynamic channel allocation for TD-SCDMA communication system |
| CN1863401A (en) * | 2006-03-14 | 2006-11-15 | 华为技术有限公司 | Method of sending mobile station address identification message and allocating identification for mobile station |
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