CN101197609A - Device for providing MBMS service in multi-carrier frequency subdistrict - Google Patents
Device for providing MBMS service in multi-carrier frequency subdistrict Download PDFInfo
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- CN101197609A CN101197609A CNA2006101610594A CN200610161059A CN101197609A CN 101197609 A CN101197609 A CN 101197609A CN A2006101610594 A CNA2006101610594 A CN A2006101610594A CN 200610161059 A CN200610161059 A CN 200610161059A CN 101197609 A CN101197609 A CN 101197609A
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Abstract
The invention discloses an apparatus providing MBMS service, which comprises a major carrier frequency configuration module, a first MBMS service provision module and a second MBMS service provision module. All of the three modules are at the side of UTRAN side; wherein, the major carrier frequency configuration module chooses one from a plurality of frequency points distributed to the cell as the major carrier frequency and the left frequency point as minor carrier frequency. The first MBMS service provision module is connected to the major carrier frequency configuration module, which is used in the minor carrier frequency to provide MBMS service by adopting PTM radio bearer and covers the central regions of the cell by means of omni-directional antenna emission mode. The second MBMS service provision module is connected to the major carrier frequency configuration module and the first MBMS service provision module, which is used in the major or minor carrier frequency to provide MBMS service by adopting PTP radio bearer and covers the edge regions of the cell by means of beamforming transmission. Through the technical proposal, the invention can reduce the losses in system capacity and improve the flexibility of the project implementation.
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 device relates in particular to the device 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 professional generator, and being used for multi-carrier frequency cell provides MBMS business.
This device comprises: the main carrier frequency configuration module, be positioned at the UTRAN side, and 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, 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; And the 2nd the MBMS business module is provided, be positioned at the UTRAN side, be connected to the main carrier frequency configuration module and a MBMS business provides module, 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.
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 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 that the MBMS business is provided on assistant carrier frequency.
And this device further comprises: further comprise: the service quality detection module, 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, be positioned at subscriber terminal side, be connected to the service quality detection module, be used for when the service quality that the service quality detection module 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, be positioned at the UTRAN side, connect or the cell update request in response to stating RRC, corresponding Internet resources are admitted and reserved to bearing mode change module, 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 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.
In addition, this device further comprises: downlink dedicated sign indicating number transmitted power detection module, be positioned at the UTRAN side, and be connected to bearing mode change module, 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, detecting 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, bearing mode change module 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.
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 S 102 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 (10)
1. multimedia broadcasting and multicast service generator, being used for multi-carrier frequency cell provides multimedia broadcasting and multicast service, it is characterized in that, comprising:
The main carrier frequency configuration module is positioned at the UTRAN side, selects one as main carrier frequency from a plurality of frequencies of distributing to the sub-district, and all the other frequencies are as assistant carrier frequency;
First multimedia broadcasting and multicast service provide module, be positioned at the UTRAN side, be connected to described main carrier frequency configuration module, be used on assistant carrier frequency, using point-to-multipoint radio bearer mode that multimedia broadcasting and multicast service are provided, take the central area of omni-directional antenna transmission mode coverage cell; And
Second multimedia broadcasting and multicast service provide module, be positioned at the UTRAN side, be connected to described main carrier frequency configuration module and described first multimedia broadcasting and multicast service module is provided, be used on described main carrier frequency or assistant carrier frequency, using point-to-point radio bearer mode that multimedia broadcasting and multicast service are provided, take beam forming emission formula coverage cell fringe region.
2. multimedia broadcasting according to claim 1 and multicast service generator is characterized in that, for neighbor cell, and the main carrier frequency difference that described main carrier frequency configuration module is selected.
3. multimedia broadcasting according to claim 1 and multicast service generator, it is characterized in that the factor that described second multimedia broadcasting and multicast service are depended on when providing 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.
4. multimedia broadcasting according to claim 3 and multicast service generator, it is characterized in that, 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 described second multimedia broadcasting and multicast service provide module that 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 described second multimedia broadcasting and multicast service provide module that multimedia broadcasting and multicast service are provided on described assistant carrier frequency.
5. multimedia broadcasting according to claim 1 and multicast service generator is characterized in that, further comprise:
The service quality detection module is positioned at subscriber terminal side, and the user terminal that is used to be under the point-to-multipoint radio bearer mode detects the multimedia broadcasting of reception and the service quality of multicast control channel;
Bearing mode change request module, be positioned at subscriber terminal side, be connected to described service quality detection module, be used for when the service quality that described service quality detection module detects the multimedia broadcasting that receives and multicast control channel does not reach qos requirement, initiate RRC and connect or the cell update request, change to point-to-point bearing mode with request; And
Bearing mode change module, be positioned at the UTRAN side, connect or the cell update request in response to the described RRC that states, corresponding Internet resources are admitted and reserved to described bearing mode change module, and under the admittance case of successful described user terminal is adjourned point-to-point bearing mode.
6. multimedia broadcasting according to claim 5 and multicast service generator, it is characterized in that, if the load of multimedia broadcasting and multicast service frequency is higher or the time-slot code channel inadequate resource, then described bearing mode change module is carried out the reduction of speed processing to multimedia broadcasting and multicast service, wherein, the order of reduction of speed processing is by the priority decision of business.
7. multimedia broadcasting according to claim 5 and multicast service generator is characterized in that, further comprise:
Downlink dedicated sign indicating number transmitted power detection module is positioned at the UTRAN side, is connected to bearing mode change module, is used to detect the downlink dedicated sign indicating number transmitted power of the user terminal that is under the point-to-point radio bearer mode.
8. multimedia broadcasting according to claim 7 and multicast service generator is characterized in that, described downlink dedicated sign indicating number transmitted power is taked incident or period measurement report manner.
9. multimedia broadcasting according to claim 7 and multicast service generator, it is characterized in that, detect under the situation of downlink dedicated sign indicating number transmitted power less than predetermined threshold at described downlink dedicated sign indicating number transmitted power detection module, described bearing mode change module is adjourned the point-to-multipoint bearing mode with described user terminal, and discharges the dedicated channel under the point-to-point mode of described user terminal.
10. multimedia broadcasting according to claim 9 and multicast service generator is characterized in that, described predetermined threshold is determined according to the point-to-multipoint covering radius of sub-district and the covering radius of subdistrict beaconing channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101610594A CN101197609A (en) | 2006-12-04 | 2006-12-04 | Device for providing MBMS service in multi-carrier frequency subdistrict |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101610594A CN101197609A (en) | 2006-12-04 | 2006-12-04 | Device for providing MBMS service in multi-carrier frequency subdistrict |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101197609A true CN101197609A (en) | 2008-06-11 |
Family
ID=39547787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101610594A Withdrawn CN101197609A (en) | 2006-12-04 | 2006-12-04 | Device for providing MBMS service in multi-carrier frequency subdistrict |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101197609A (en) |
-
2006
- 2006-12-04 CN CNA2006101610594A patent/CN101197609A/en not_active Withdrawn
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