CN101198082B - Method for providing MBMS service in multi-carrier frequency subdistrict - Google Patents
Method for providing MBMS service in multi-carrier frequency subdistrict Download PDFInfo
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- CN101198082B CN101198082B CN200610161058XA CN200610161058A CN101198082B CN 101198082 B CN101198082 B CN 101198082B CN 200610161058X A CN200610161058X A CN 200610161058XA CN 200610161058 A CN200610161058 A CN 200610161058A CN 101198082 B CN101198082 B CN 101198082B
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Abstract
The invention discloses a MBMS service providing method which includes the following steps: the first step, a frequency point in a plurality of frequency points distributed for a cell is selected as a main carrier frequency, and the others are taken as auxiliary carrier frequencies; the second step, the cell provides a MBMS service on the auxiliary carrier frequencies with PTM wireless bearer mode, and the central area of the cell is covered by adopting an omnidirectional antenna transmitting mode; the third step, the cell provides the MBMS service on the main carrier frequency or the auxiliary carrier frequencies with PTP wireless bearer mode, and the cell-edge is covered by adopting a shaped beam transmitting mode; the fourth step, a user terminal detects the service quality of a received MBMS service channel; the fifth step, when the service quality can not fulfill the QoS requirement, a RRC connection or a cell update request is initiated, thereby requesting to change into the PTP bearer mode; and the sixth step, the request is responded, a UTRAN side accepts and reserves relative network resource, and the user terminal is transmitted to the PTP bearer mode in the case of successful acceptance.
Description
Technical field
The present invention relates to a kind of multi-carrier frequency cell MBMS is provided (Multimedia BroadcastMulticast Service, multimedia broadcast/multi broadcast business) Ye Wu method relates in particular to the method that multi-carrier frequency cell in wireless communication field TD SDMA (TD-SCDMA) system provides the MBMS business.
Background technology
Satisfy the ever-increasing demand in mobile communication market, the power system capacity that improves hot zones covers, TD-SCDMA multi-carrier frequency cell notion is that a plurality of sub-districts of identical geographical coverage area (each carrier frequency is a sub-district) is merged together, share same set of common channel resources, thereby constitute a multi-carrier frequency cell.In actual networking, use multi-carrier frequency cell, not only on RRM, reduced complexity, and the main carrier frequency of neighbor cell is configured on the different frequencies, not only can reduce the interference of pilot channel and common signal channel effectively, but also can reduce requirement effectively, thereby can guarantee to carry out networking with flexible way more to the base station acc power.
Along with the commercialization of 3-G (Generation Three mobile communication system), mobile TV service (MobileTV) more and more receives the concern of operator at present.Multimedia broadcasting and multicast service are provided in TD SDMA (TD-SCDMA) system, and (Multimedia Broadcast/MulticastService MBMS) also becomes an active demand.Organize the agreement of 3GPP according to global standardsization to the MBMS business, the MBMS business is at universal land radio access web (Universal Terrestrial Radio Access Network, UTRAN) and subscriber equipment (User Equipment, dual mode is arranged: point-to-multipoint (Point-to-Multipoint when transmitting UE), PTM) mode and point-to-point (Point-to-Point, PTP) mode.The PTM mode is used common logical point multipoint message traffic channel, and (MBMS PTMTraffic Channel MTCH) adds multicast service or the interested UE of broadcasting service is sent data all; The PTP mode then uses dedicated logical channel DTCH 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 number of broadcasting service.
Just there are some problems when in the TD-SCDMA multi-carrier frequency system, providing MBMS professional.Logic channel MTCH under the MBMS PTM mode is mapped to the fl transmission channel (forward access channel FACH), and finally is carried on the SCCPCH public physic 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.For example, the MBMS service needed of 1 64K is used 8 code channels in the TD-SCDMA system, and the MBMS service needed of 1 128K is used 16-18 bar code channel.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, can take two class methods: the one, the UE side uses multi-plot joint to detect, and eliminates co-channel interference; Two are to use some strategies to avoid co-channel interference.First method can increase the complexity of terminal undoubtedly sharp, and its actual effect depends on the ability of UE.Second method is that the power system capacity with sacrificial section exchanges evading of co-channel interference on time, space or frequency domain.Just recommended the method that time slot is reused (timeslot reuse) in a kind of time-division synchro-duplexing TDD system in the 3GPP agreement 25.346.This method is divided into transmission group or transmission collection (transmission set) with microzonation.Each transmission collection is monopolized with a time slot (or set of time-slot) and is sent the MBMS business.Different transmission collection transmit identical MBMS business at different time slots.So just can stagger and send business time-slot and avoid the adjacent area to disturb by neighbor cell.But this method must use three above time slots to send identical business, causes the loss of power system capacity.When real network is planned, also need the cell transmission group of careful planning MBMS business, concrete engineering construction can more complicated.
Summary of the invention
In view of the problem of co-channel interference of minizone during identical networking in the correlation technique, main purpose of the present invention is to provide the method and apparatus that a kind of multi-carrier frequency cell provides the MBMS business, is particularly useful for the TD-SCDMA system.
Embodiments of the invention provide a kind of MBMS business that method is provided, and being used for multi-carrier frequency cell provides MBMS business.
This method may further comprise the steps: first step, from a plurality of frequencies of distributing to the sub-district, select one as main carrier frequency, and all the other frequencies are as assistant carrier frequency; Second step, sub-district use PTM radio bearer mode that MBMS is provided business on assistant carrier frequency, take the central area of omni-directional antenna transmission mode coverage cell; And third step, the sub-district uses PTP radio bearer mode that MBMS is provided business on main carrier frequency or assistant carrier frequency, takes beam forming emission formula coverage cell fringe region.
Wherein, in first step, the main carrier frequency of neighbor cell is inequality.In addition, in third step, the factor that the selection of main carrier frequency or assistant carrier frequency is depended on comprises: the state of the load condition of main carrier frequency, the ability of user terminal, voice and packet data concurrent service.And, in third step, be supported at user terminal and carry PTP on the main carrier frequency, and the main carrier frequency load is under the situation of non-overload, the MBMS business is provided on main carrier frequency; Be not supported at user terminal and carry PTP on the main carrier frequency, perhaps the main carrier frequency load is under the situation of overload, and the MBMS business is provided on assistant carrier frequency.
Wherein, be at user terminal under the situation of PTM radio bearer mode, further may further comprise the steps: steps A, user terminal detects the service quality of the MBMS Traffic Channel that receives; Step B when the service quality that detects the MBMS Traffic Channel that receives at user terminal does not reach qos requirement, initiates RRC and connects or the cell update request, changes to the PTP bearing mode with request; And step C, connecting or the cell update request in response to RRC, corresponding Internet resources are admitted and reserved to the UTRAN side, and under the admittance case of successful user terminal is adjourned the PTP bearing mode.
Wherein, in step C, if the load of MBMS frequency is higher or the time-slot code channel inadequate resource, then the MBMS business is carried out reduction of speed and handle, wherein, the order that reduction of speed is handled is by the priority decision of business.
In addition, be at user terminal under the situation of PTP radio bearer mode, further may further comprise the steps: steps A ': the UTRAN side detects the downlink dedicated sign indicating number transmitted power of user terminal; Step B ': under the situation of downlink dedicated sign indicating number transmitted power, user terminal is adjourned the PTM bearing mode, and discharge the dedicated channel under the user terminal PTP mode less than predetermined threshold.
Wherein, in steps A ' in, downlink dedicated sign indicating number transmitted power is taked incident or period measurement report manner.In addition, in step B ', predetermined threshold is determined according to the PTM covering radius of sub-district and the covering radius of subdistrict beaconing channel.
Wherein, if the load of MBMS frequency is higher or the time-slot code channel inadequate resource, then bearing mode change module is carried out the reduction of speed processing to the MBMS business, and wherein, the order that reduction of speed is handled is by the priority decision of business.
By technique scheme, the present invention can reduce the loss of power system capacity aspect, and has improved the flexibility ratio of engineering construction.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart that method is provided according to the MBMS business of first embodiment of the invention;
Fig. 2 is the flow chart that method is provided according to the MBMS business of second embodiment of the invention;
Fig. 3 is the schematic diagram that the MBMS business is provided during according to the N frequency point cell identical networking of the embodiment of the invention; And
Fig. 4 is the block diagram according to the professional generator of MBMS of third embodiment of the invention.
Embodiment
Describe the present invention below with reference to the accompanying drawings in detail.
First embodiment
At first the first embodiment of the present invention is described with reference to Fig. 1.Fig. 1 is the flow chart that method is provided according to the MBMS business of first embodiment of the invention.
In the present embodiment, user terminal adopts the PTM mode.
As shown in Figure 1, provide method may further comprise the steps according to the MBMS business of first embodiment of the invention: step S102, from a plurality of frequencies of distributing to the sub-district, select one as main carrier frequency, all the other frequencies are as assistant carrier frequency; Step S104, the sub-district uses PTM radio bearer mode that MBMS is provided business on assistant carrier frequency, takes the central area of omni-directional antenna transmission mode coverage cell, and as shown in Figure 3, the overlay area of PTM mode is the center of housing estate shadow region; And step S106, the sub-district uses PTP radio bearer mode that MBMS is provided business on main carrier frequency or assistant carrier frequency, takes beam forming emission formula coverage cell fringe region.
Wherein, in step S102, the main carrier frequency of neighbor cell is inequality.
In addition, in step S106, the factor that the selection of main carrier frequency or assistant carrier frequency is depended on comprises: the state of the load condition of main carrier frequency, the ability of user terminal, voice and packet data concurrent service.And, in step S106, be supported at user terminal and carry PTP on the main carrier frequency, and person's main carrier frequency load is under the situation of non-overload, the MBMS business is provided on main carrier frequency; Be not supported at user terminal and carry PTP on the main carrier frequency, perhaps the main carrier frequency load is under the situation of overload, and the MBMS business is provided on assistant carrier frequency.
Method according to present embodiment further may further comprise the steps: step S108, and user terminal detects the service quality of the MBMS Traffic Channel that receives; Step S110 when the service quality that detects the MBMS Traffic Channel that receives at user terminal does not reach qos requirement, initiates RRC and connects or the cell update request, changes to the PTP bearing mode with request; And step S112, connecting or the cell update request in response to RRC, corresponding Internet resources are admitted and reserved to the UTRAN side, and under the admittance case of successful user terminal is adjourned the PTP bearing mode.
Wherein, in step S112, if the load of MBMS frequency is higher or the time-slot code channel inadequate resource, then the MBMS business is carried out reduction of speed and handle, wherein, the order that reduction of speed is handled is by the priority decision of business.
Second embodiment
With reference to Fig. 2 the second embodiment of the present invention is described below.Fig. 2 is the flow chart that method is provided according to the MBMS business of second embodiment of the invention.
In the present embodiment, user terminal adopts the PTP mode.
As shown in Figure 2, provide method may further comprise the steps according to the MBMS business of second embodiment of the invention: step S202, from a plurality of frequencies of distributing to the sub-district, select one as main carrier frequency, all the other frequencies are as assistant carrier frequency; Step S204, the sub-district uses PTM radio bearer mode that MBMS is provided business on assistant carrier frequency, takes the central area of omni-directional antenna transmission mode coverage cell, and as shown in Figure 3, the overlay area of PTM mode is the center of housing estate shadow region; And step S206, the sub-district uses PTP radio bearer mode that MBMS is provided business on main carrier frequency or assistant carrier frequency, takes beam forming emission formula coverage cell fringe region.
Wherein, in step S202, the main carrier frequency of neighbor cell is inequality.In addition, in step S206, the factor that the selection of main carrier frequency or assistant carrier frequency is depended on comprises: the state of the load condition of main carrier frequency, the ability of user terminal, voice and packet data concurrent service.And, in step S206, be supported at user terminal and carry PTP on the main carrier frequency, and the main carrier frequency load is under the situation of non-overload, the MBMS business is provided on main carrier frequency; Be not supported at user terminal and carry PTP on the main carrier frequency, perhaps the main carrier frequency load is under the situation of overload, and the MBMS business is provided on assistant carrier frequency.
Further may further comprise the steps: step S208:UTRAN side detects the downlink dedicated sign indicating number transmitted power of user terminal; Step S210: under the situation of downlink dedicated sign indicating number transmitted power, user terminal is adjourned the PTM bearing mode, and discharge the dedicated channel under the user terminal PTP mode less than predetermined threshold.
Wherein, in step S208, downlink dedicated sign indicating number transmitted power is taked incident or period measurement report manner.In addition, in step S210, predetermined threshold is determined according to the PTM covering radius of sub-district and the covering radius of subdistrict beaconing channel.
For instance, in the above-described embodiments, in step S102 and step S202, can be from the frequency set { f that distributes
1, f
2, f
3In determine a frequency, for example among Fig. 3, Cell# 1 chooses f
3As main carrier frequency, all the other are assistant carrier frequency; Cell# 2 chooses f
1As main carrier frequency, all the other are assistant carrier frequency; Cell#3 chooses f
2As main carrier frequency, all the other are assistant carrier frequency;
When the service quality of the MBMS Traffic Channel that detects reception reaches quality of service requirement, the UTRAN side joint is received and reserve the unsuccessful or downlink dedicated of respective network resource when sending sign indicating number power and reaching requirement, keep user's former bearing mode.
The 3rd embodiment
With reference to Fig. 4 the fourth embodiment of the present invention is described below.Fig. 4 is the block diagram according to the professional generator 400 of MBMS of the embodiment of the invention.
As shown in Figure 4, comprise according to the professional generator 400 of the MBMS of the embodiment of the invention: main carrier frequency configuration module 402, be positioned at the UTRAN side, from a plurality of frequencies of distributing to the sub-district, select one as main carrier frequency, all the other frequencies are as assistant carrier frequency; The one MBMS business provides module 404, is positioned at the UTRAN side, is connected to the main carrier frequency configuration module, is used for using on assistant carrier frequency PTM radio bearer mode that MBMS is provided business, takes the central area of omni-directional antenna transmission mode coverage cell by transceiver 416; And the 2nd the MBMS business module 406 is provided, be positioned at the UTRAN side, be connected to main carrier frequency configuration module 402 and a MBMS business provides module 404, be used on main carrier frequency or assistant carrier frequency, using PTP radio bearer mode that MBMS is provided business, take beam forming emission formula coverage cell fringe region by transceiver 416.
Wherein, for neighbor cell, the main carrier frequency difference that the main carrier frequency configuration module is selected.The factor that is depended on when in addition, the 2nd MBMS business provides module to select main carrier frequency or assistant carrier frequency comprises: the state of the load condition of main carrier frequency, the ability of user terminal, voice and packet data concurrent service.
And, be supported at user terminal and carry PTP on the main carrier frequency, and the main carrier frequency load being under the situation of non-overload, the 2nd MBMS business provides module 406 that the MBMS business is provided on main carrier frequency; Be not supported at user terminal and carry PTP on the main carrier frequency, perhaps the main carrier frequency load is under the situation of overload, and the 2nd MBMS business provides module 406 that the MBMS business is provided on assistant carrier frequency.
And this device further comprises: service quality detection module 408, be positioned at subscriber terminal side, and be used to be in the service quality of the MBMS Traffic Channel of the user terminal detection reception under the PTM radio bearer mode; Bearing mode change request module 410, be positioned at subscriber terminal side, be connected to service quality detection module 408, be used for when the service quality that service quality detection module 408 detects the MBMS Traffic Channel that receives does not reach qos requirement, initiate RRC and connect or the cell update request, change to the PTP bearing mode with request; And bearing mode change module 412, be positioned at the UTRAN side, connect or the cell update request in response to above-mentioned RRC, corresponding Internet resources are admitted and reserved to bearing mode change module 412, and under the admittance case of successful user terminal is adjourned the PTP bearing mode.
Wherein, if the load of MBMS frequency is higher or the time-slot code channel inadequate resource, then 412 pairs of MBMS business of bearing mode change module are carried out the reduction of speed processing, and wherein, the order that reduction of speed is handled is by the priority decision of business.
In addition, this device further comprises: downlink dedicated sign indicating number transmitted power detection module 414, be positioned at the UTRAN side, and be connected to bearing mode change module 412, be used to detect the downlink dedicated sign indicating number transmitted power of the user terminal that is under the PTP radio bearer mode.
Wherein, downlink dedicated sign indicating number transmitted power is taked incident or period measurement report manner.And, detect under the situation of downlink dedicated sign indicating number transmitted power less than predetermined threshold at downlink dedicated sign indicating number transmitted power detection module 414, bearing mode change module 412 is adjourned the PTM bearing mode with user terminal, and discharges the dedicated channel under the user terminal PTP mode.Wherein, predetermined threshold is determined according to the PTM covering radius of sub-district and the covering radius of subdistrict beaconing channel.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. multimedia broadcasting and multicast service provide method, and being used for multi-carrier frequency cell provides multimedia broadcasting and multicast service, it is characterized in that, may further comprise the steps:
First step is selected one as main carrier frequency from a plurality of frequencies of distributing to the sub-district, all the other frequencies are as assistant carrier frequency, and the main carrier frequency of neighbor cell is inequality;
Second step, described sub-district use point-to-multipoint radio bearer mode that multimedia broadcasting and multicast service are provided on described assistant carrier frequency, take the central area of omni-directional antenna transmission mode coverage cell; And
Third step, described sub-district use point-to-point radio bearer mode that multimedia broadcasting and multicast service are provided on described main carrier frequency or assistant carrier frequency, take beam forming emission formula coverage cell fringe region.
2. multimedia broadcasting according to claim 1 and multicast service provide method, it is characterized in that, in described third step, the factor that the selection of main carrier frequency or assistant carrier frequency is depended on comprises: the state of the load condition of main carrier frequency, the ability of user terminal, voice and packet data concurrent service.
3. multimedia broadcasting according to claim 2 and multicast service provide method, it is characterized in that, in described third step, it is point-to-point to be supported on the main carrier frequency carrying at user terminal, and the main carrier frequency load is under the situation of non-overload, and multimedia broadcasting and multicast service are provided on described main carrier frequency; It is point-to-point not to be supported on the main carrier frequency carrying at user terminal, and perhaps the main carrier frequency load is under the situation of overload, and multimedia broadcasting and multicast service are provided on described assistant carrier frequency.
4. multimedia broadcasting according to claim 1 and multicast service provide method, it is characterized in that, are at user terminal under the situation of point-to-multipoint radio bearer mode, further may further comprise the steps:
Steps A, user terminal detects the multimedia broadcasting of reception and the service quality of multicast control channel;
Step B when the service quality that detects the multimedia broadcasting that receives and multicast control channel at described user terminal does not reach qos requirement, initiates RRC and connects or the cell update request, changes to point-to-point bearing mode with request; And
Step C connects or the cell update request in response to described RRC, and corresponding Internet resources are admitted and reserved to the UTRAN side, and under the admittance case of successful described user terminal is adjourned point-to-point bearing mode.
5. multimedia broadcasting according to claim 4 and multicast service provide method, it is characterized in that, in described step C, if the load of multimedia broadcasting and multicast service frequency is higher or the time-slot code channel inadequate resource, then multimedia broadcasting and multicast service are carried out the reduction of speed processing, wherein, the order of reduction of speed processing is by the priority decision of business.
6. multimedia broadcasting according to claim 1 and multicast service provide method, it is characterized in that, are at user terminal under the situation of point-to-point radio bearer mode, further may further comprise the steps:
Steps A ': the UTRAN side detects the downlink dedicated sign indicating number transmitted power of described user terminal;
Step B ': under the situation of described downlink dedicated sign indicating number transmitted power, described user terminal is adjourned the point-to-multipoint bearing mode, and discharge the dedicated channel under the point-to-point mode of described user terminal less than predetermined threshold.
7. multimedia broadcasting according to claim 6 and multicast service provide method, it is characterized in that, in described steps A ' in, described downlink dedicated sign indicating number transmitted power is taked incident or period measurement report manner.
8. multimedia broadcasting according to claim 6 and multicast service provide method, it is characterized in that, in described step B ', described predetermined threshold is determined according to the point-to-multipoint covering radius of sub-district and the covering radius of subdistrict beaconing channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610161058XA CN101198082B (en) | 2006-12-04 | 2006-12-04 | Method for providing MBMS service in multi-carrier frequency subdistrict |
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| CN200610161058XA CN101198082B (en) | 2006-12-04 | 2006-12-04 | Method for providing MBMS service in multi-carrier frequency subdistrict |
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| CN101198082B true CN101198082B (en) | 2011-04-06 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101651481B (en) * | 2008-08-15 | 2013-04-17 | 工业和信息化部电信传输研究所 | Method for improving quality of broadcasting service in mobile communication network |
| EP2403156A4 (en) * | 2009-02-27 | 2014-07-09 | Alcatel Lucent | Cooperative beam forming method, device and base station |
| CN109246743B (en) | 2017-04-28 | 2021-10-15 | 华为技术有限公司 | Beam management method, terminal equipment and network equipment |
| EP4183146A4 (en) * | 2020-08-07 | 2024-04-17 | JRD Communication (Shenzhen) Ltd | Apparatus and method for multicast/broadcast service |
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| CN1476260A (en) * | 2002-08-16 | 2004-02-18 | ��������ͨ�ż����о�����˾ | Multimedid broadcasting and switching method of organizing broadcasting business point to point channel and point to multipoint channel |
| CN1496141A (en) * | 2002-08-16 | 2004-05-12 | 北京三星通信技术研究有限公司 | Conversion method of MBMS point-to-point channel and point-to-multipoint channel |
| CN1600041A (en) * | 2001-03-28 | 2005-03-23 | 高通股份有限公司 | Method and apparatus for channel management for point-to-multipoint services in a communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1600041A (en) * | 2001-03-28 | 2005-03-23 | 高通股份有限公司 | Method and apparatus for channel management for point-to-multipoint services in a communication system |
| CN1476260A (en) * | 2002-08-16 | 2004-02-18 | ��������ͨ�ż����о�����˾ | Multimedid broadcasting and switching method of organizing broadcasting business point to point channel and point to multipoint channel |
| CN1496141A (en) * | 2002-08-16 | 2004-05-12 | 北京三星通信技术研究有限公司 | Conversion method of MBMS point-to-point channel and point-to-multipoint channel |
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