CN100562149C - Adopt the system of single slot network transceiving MBMS among the TD-SCDMA - Google Patents
Adopt the system of single slot network transceiving MBMS among the TD-SCDMA Download PDFInfo
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- CN100562149C CN100562149C CNB2007101020549A CN200710102054A CN100562149C CN 100562149 C CN100562149 C CN 100562149C CN B2007101020549 A CNB2007101020549 A CN B2007101020549A CN 200710102054 A CN200710102054 A CN 200710102054A CN 100562149 C CN100562149 C CN 100562149C
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Abstract
The invention discloses the system that adopts single-slot network UTN transmitting-receiving multimedia broadcast-multicast service MBMS among a kind of TD-SCDMA, comprise radio network controller, Node B and subscriber equipment.Wherein, radio network controller is used for sending the UTN configuration information to subscriber equipment, be UTN scrambler of each time slot configuration of carrying MBMS business, and and Node B between set up the less important Common Control Physical Channel SCCPCH of carrying MBMS business, and dispose the UTN scrambler for Node B; Node B is used for setting up the SCCPCH channel with radio network controller, adopts the UTN scrambler of configuration that the MBMS data are carried out sending after the scrambling; Subscriber equipment is used for receiving the MBMS business datum according to the UTN configuration information that receives on follow-up SCCPCH.Adopt the present invention, can avoid the neighbor cell problem of co-channel interference in the TD-SCDMA system.
Description
Technical field
The present invention relates to field of wireless communication, particularly the receive-transmit system of multimedia broadcasting and multicast service in the TDS-CDMA system (TD-SCDMA).
Background technology
Along with the fast development of Internet and popularizing of large-screen multi-functional mobile phone, a large amount of mobile data multimedia services emerge, various high bandwidth multimedia services constantly occur, as video conference, television broadcasting, video request program, advertisement, online education, interactive game etc., satisfy the business demand that the mobile subscriber constantly rises on the one hand, also bring new business growth point simultaneously for mobile operator.These mobile multi-media services require a plurality of users can receive identical data simultaneously, compare with general data, have characteristics such as data volume is big, longer duration, delay sensitive.
In order to effectively utilize mobile network resource, third generation partner program (3rd GenerationPartnership Project, abbreviation 3GPP) multimedia broadcasting and multicast service (MultimediaBroadcast Multicast Service have been proposed, be called for short MBMS), this business is a kind of technology that transmits data from a data source to a plurality of targets, thereby realize sharing of network (comprising core net and Access Network) resource, improve the utilance of Internet resources (especially air interface resource).The MBMS of 3GPP definition can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can also realize the broadcasting and the multicast of high-speed multimedia business, multiple rich video, audio frequency and multimedia service are provided, this has complied with the trend of following mobile data development undoubtedly, for the development of 3G provides better professional prospect.
The configuration of the professional radio bearer of MBMS can be adopted the bearer types of P-T-M (put multiple spot, also can write a Chinese character in simplified form PTM or ptm) and P-T-P (point-to-point also can be write a Chinese character in simplified form PTP or ptp).The PTM mode of MBMS business uses common logical MTCH (MBMS PTM Traffic Channel, MBMS point multipoint message traffic channel) that all are added multicast service or the interested UE of broadcasting service is sent data; The MTCH logic channel is mapped to transmission channel FACH (Forward Access Channel, forward access channel), by physical channel Secondary CCPCH (Secondary CommonControl Physical Channel, less important Common Control Physical Channel is called for short SCCPCH) send at wave point.System side RNC (radio network controller) informs the configuration informations such as physical channel of the relevant MBMS business configuration of UE by MCCH (MBMSpoint-to-multipoint Control Channel, the MBMS point is to the multiple spot control channel) channel.
The MBMS related news of the last transmission of MCCH comprise: MBMS Access Information (MBMS access information), MBMS Common p-t-m rb Information (the public point to multi-point wireless beared information of MBMS), MBMS Current Cell p-t-m rb Information (MBMS current area P-T-M wireless loading information), MBMS General Information (MBMS general information), MBMS Modified services Information (MBMS revises business information), MBMSUnmodified services Information (MBMS does not revise business information) or the like.
UTRAN carries out the relevant system information broadcast of MBMS in system message (SIB5 and SIB5bis), comprise MBMS PTM control channel (MCCH:MBMS point-to-multipoint ControlChannel) configuration information.
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, and finally is carried on public physic channel SCCPCH.Because public physic channel SCCPCH uses omni-directional antenna transmission, and because MBMS business at a high speed mobile TV service normally takies many code channels.Therefore, when using the SCCPCH channel of omni-directional antenna transmission to carry out the continuous covering of MBMS business, can cause the co-channel interference of serious minizone, 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 well accepted scheme is single-slot network (Uniform Timeslot Network, a UTN) technology.Require all neighbor cells to use same carrier, time slot, channel code, scrambler and basic midamble (training sequence) sign indicating number when sending the wireless signal of same MBMS business channels based on this technology, at a time on the crack, different districts sends after all adopting identical scrambler to the wireless signal scrambling, UE can be considered as multipath signal with the signal that comes from different base station when receiving, UE can obtain bigger performance gain after the multipath signal that receives is carried out multipath merging processing.Simultaneously, the UTN networking technology can be avoided the neighbor cell problem of co-channel interference in the TD-SCDMA system.
In existing 3G wireless network networking, the cell scrambling that disposes between the neighbor cell is different in twos, so that UE is according to the wireless signal of different scrambler differences from different districts.And the UTN mode sends wireless signal, requires neighbor cell to send the professional wireless signal of identical MBMS on identical frequency, time slot.This is different from the UTN scrambler of cell scrambling with regard to requiring system to the time slot configuration that sends the MBMS service signal.Like this, network side carries out scrambling with the UTN scrambler to the professional wireless signal of MBMS and handles having disposed on the frequency time slot of UTN, and the time slot that does not dispose UTN is used cell scrambling.UE receives wireless signal having disposed on the frequency time slot of UTN, uses the UTN scrambler of network configuration to carry out scramble process, and uses cell scrambling not disposing on the frequency time slot of UTN.
In the TD-SCDMA system, the MBMS business of some speed (such as the 256Kbps business) may occupy a plurality of continuous time slot, according to the UTN mode of routine, can use identical scrambler on these two continuous slots.As shown in Figure 1, for the UTN MBMS signal that uses with the multi-slot emission of scrambler, UE need merge long time delay from the base station, distant place (such as with the time delay of this cell MBMS signal greater than 16 chip) during signal, long time delay signal with scrambler will produce the bigger time slot interference of striding, thereby influence the merging reception of the UE of UTN pattern to multi-slot MBMS signal.
In existing 3GPP agreement, do not have definition how in the TD-SCDMA system, to dispose the needed UTN scrambling code information on specific frequency time slot of UTN, thereby can't carry out the MBMS data transmit-receive of UTN mode.
Summary of the invention
Technical problem to be solved by this invention provides the system that adopts single slot network transceiving MBMS among a kind of TD-SCDMA.
In order to solve the problems of the technologies described above, the invention provides the system that adopts single-slot network UTN transmitting-receiving multimedia broadcast-multicast service MBMS among a kind of TD-SCDMA, comprise radio network controller, Node B and subscriber equipment, it is characterized in that:
Described radio network controller, be used for sending the UTN configuration information to subscriber equipment, be UTN scrambler of each time slot configuration of described carrying MBMS business, and and Node B between set up the less important Common Control Physical Channel SCCPCH of carrying MBMS business, and dispose the UTN scrambler for Node B;
Described Node B is used for setting up SCCPCH with radio network controller, adopts the UTN scrambler of described configuration that the MBMS data are carried out sending after the scrambling;
Described subscriber equipment is used for receiving the MBMS business datum according to the UTN configuration information that receives on follow-up SCCPCH.
Further, described radio network controller by the MBMS point to the public point to multi-point wireless bearer messages of the MBMS on the multiple spot control channel, be MBMS Common p-t-m RB Information, the perhaps general message of MBMS, be MBMS General Information, perhaps MBMS current area P-T-M wireless loading message, be MBMS Current Cell P-t-m RB Information, perhaps system message, be system information, described UTN configuration information is sent to subscriber equipment.
Further, described radio network controller is set up SCCPCH by setting up message to Node B transmission Common transport channel; Described radio network controller be Node B configuration UTN scrambler one of in the following ways: radio network controller is the time slot configuration UTN scrambler at described SCCPCH place, and at this moment, described Common transport channel is set up and carried time slot and UTN scrambler in the message; Radio network controller is every SCCPCH configuration UTN scrambler, and the identical UTN sign indicating number of the configuration of the SCCPCH in the same time slot, and at this moment, described Common transport channel is set up and carried the UTN scrambler in the message.Radio network controller is UTN scrambler of each coded combination transmission channel configuration.
Further, comprise frequency point information, time slot and UNT scrambler in the described UTN configuration information, described UTN scrambler is pressed the time slot configuration.
Further, described frequency point information is used to indicate the frequency that needs dispose the time slot place of UTN scrambler.
Further, described frequency point information is concrete value of frequency point, perhaps points to an index that has the list entry of frequency, perhaps points to an ident value that has the list entry of frequency.
Further, when described subscriber equipment received the MBMS business datum, the UTN scrambler carried out scramble process to the MBMS business datum on the corresponding frequency time slot in the described configuration information that employing earlier receives.
Further, when described MBMS service needed occupied a plurality of time slot, described radio network controller was a plurality of differences of time slot configuration of carrying MBMS business or identical UTN scrambler.
Further, when described radio network controller during for a plurality of different UTN scrambler of the time slot configuration of carrying MBMS business, described Node B recycles the scrambler that is disposed described MBMS data is carried out scrambling.
Adopt system of the present invention, make and to realize that in the TD-SCDMA system single-slot network mode receives and dispatches the MBMS business datum, can avoid the neighbor cell problem of co-channel interference in the TD-SCDMA system, when subscriber equipment need merge long time delay MBMS signal from the base station, distant place, can well weaken and stride the signal interference of time slot with homogenizing, improve receptivity, simultaneously, make UE can obtain big performance gain aspect the receiving broadcast service signal, improve the service quality of MBMS business, improve the broadcasting service availability of frequency spectrum, the realization of UE side is also comparatively simple simultaneously.
Description of drawings
Fig. 1 is the time slot interference schematic diagram that in the MBMS service signal SCCPCH channel is provided with the UTN scrambler in the prior art;
Fig. 2 is when the emission of MBMS service signal need take 2 continuous slots in the present embodiment, the UTN scrambler set-up mode schematic diagram of continuous slot;
Fig. 3 is when MBMS service signal emission need take 2 above continuous slots in the present embodiment, the UTN scrambler set-up mode schematic diagram of continuous slot.
Embodiment
In the present embodiment, adopt the system of single slot network transceiving multimedia broadcast-multicast service, comprise radio network controller, Node B and subscriber equipment, wherein:
Described radio network controller, be used for sending the UTN configuration information to subscriber equipment, UTN scrambler of each time slot configuration for carrying MBMS business, and and Node B between set up the less important Common Control Physical Channel of carrying MBMS business, and being Node B configuration UTN scrambler, described less important Common Control Physical Channel is hereinafter to be referred as SCCPCH;
Described Node B is used for setting up the SCCPCH channel with radio network controller, adopts the UTN scrambler of described configuration that the MBMS data are carried out sending after the scrambling;
Described subscriber equipment is used for receiving the MBMS business datum according to the UTN configuration information that receives on follow-up SCCPCH.
When the MBMS of UTN pattern service needed occupies a plurality ofly during with continuous slots emission frequently, use different scramblers between adjacent time slot, as shown in Figure 2, occupy 2 time slots with the MBMS service needed of UTN pattern and finish the MBMS signal of multi-slot and be emitted as the example explanation.When the MBMS of UTN pattern service needed occupies time slot N and time slot N+1 and forms the emission of multi-slot signal, on time slot N, use scrambler A, and on time slot N+1, use scrambler B, like this occurred from the base station, distant place long time delay (such as with the time delay of this cell MBMS signal greater than 16 chip) during signal, the N time slot of long time delay signal has improved the quality of reception of UE to disturbing owing to the reason of having used different scrambling codes is greatly diminished from the signal on the N+1 time slot of base station nearby.
In the TD-SCDMA system, a sub-district can dispose a plurality of carrier frequency.When adopting the UTN mode to send wireless signal, require neighbor cell on identical frequency, time slot, to send the professional wireless signal of identical MBMS.Like this in the TD-SCDMA system, MBMS single-slot network Radio Resource can be with following information definition: frequency point information, time slot, UTN scrambler.Present embodiment increases the configuration information unit of supporting UTN by in the message of definition MBMS channel configuration, to each time slot that is configured to the UTN mode, defines the scrambler of frequency, time slot and the use at its place.
In the TD-SCDMA system, send the process of MBMS business, may further comprise the steps in the single-slot network mode:
Step 110, RNC sends UTN configuration information by the MCCH channel to UE according to service needed, comprise frequency point information, time slot and UNT scrambler in the described UTN configuration information, described UTN scrambler is pressed the time slot configuration, promptly carries corresponding UTN scrambler of each time slot of MBMS business;
The cell that defines in the configuration information sees Table 1, in MBMS Common p-t-m rb Information message, increased Frequency list (list of frequency), comprise in the table: frequency point information and the time slot tabulation that needs to dispose UTN on this frequency comprise information timeslot number and the scrambler that uses at this time slot in the tabulation of UTN time slot.The value of each parameter is not limited to this in the table, also desirable other values.
Wherein: frequency (Frequency) information indicates the frequency at the time slot place that needs configuration UTN scrambler, can be defined as concrete value of frequency point, perhaps point to an index that has the list entry of frequency, perhaps point to an ident value that has the list entry of frequency point information; Time slot (Timeslot) cell indicates the time slot that needs configuration UTN scrambler; Scrambler (Cell Parameter ID) is the cell parameter sign, indicates the scrambler of the time slot use of configuration UTN.
Above-mentioned information unit in MBMS Common P-t-m RB Information message, can also be configured in the MBMS General Information message or MBMS Current CellP-t-m RB Information message in, or in the system information (system information).
When sending same MBMS to the continuous sub-district of a slice when professional, RNC need use identical UTN scrambler for these cell configuration on identical frequency, time slot.
Step 120 is set up the SCCPCH channel of carrying MBMS business between radio network controller and the Node B, and is Node B configuration UTN scrambler;
RNC can directly be the time slot configuration UTN scrambler at described SCCPCH channel place; Perhaps, be every SCCPCH channel configuration UTN scrambler, and the identical UTN sign indicating number of SCCPCH channel configuration in the same time slot, like this, the SCCPCH channel that carries same MBMS business can dispose different UTN scramblers at different time-gap.Perhaps, radio network controller is scrambler of each CCTrCH (the coded combination transmission channel is made up of one group of SCCPCH channel) configuration.
Radio network controller is set up the SCCPCH channel by setting up message (common transport channel setup request) to Node B (NodeB) transmission Common transport channel.
When RNC directly is the time slot configuration UTN scrambler at described SCCPCH channel place, then set up at the Common transport channel of setting up the SCCPCH channel and carry time slot and UTN scrambler in the message, the cell that Common transport channel is set up definition in the request message (Common Transport Channel Setup Request) sees Table 2; When RNC is every SCCPCH channel configuration UTN scrambler, then set up and carry the UTN scrambler in the message at the Common transport channel of setting up the SCCPCH channel, the cell that defines in the configuration information sees Table 3, has increased the UTN scrambler at every physical channel SCCPCH in message.The value of each parameter is not limited to this in the table, also desirable other values.
Step 130, Node B carries out sending after the scrambling to the MBMS data according to described UTN scrambler.
Because RNC can or be every SCCPCH channel or is that each CCTrCH disposes UTN scrambler for the time slot at SCCPCH channel place, therefore Node B also has multiple mode when sending, can carry out scrambling with the UTN scrambler to the MBMS business datum on the frequency time slot that has disposed the UTN scrambler as network side and handle, described frequency time slot is meant the time slot on certain frequency that has disposed the UTN scrambler.Handle and use cell scrambling to carry out scrambling to the time slot that does not dispose UTN, it is identical with non-UTN mode that other handles the UTN mode.Perhaps on the physical channel that has disposed the UTN scrambler, send with the scrambler scrambling.
Table 1 (overstriking person is for newly-increased in the table)
| Information Element/Group name | Need | Multi | Type and reference | Semantics description | Version |
| Message type | MP | Message Type | REL-6 | ||
| RB information list | MP | 1 to <maxMBMS -CommonR B> | REL-6 | ||
| ＞RB identity | MP | MBMS Common RB identity 10.3.9a.3 | REL-6 | ||
| ＞PDCP info | MP | PDCP info 10.3.4.2 | REL-6 | ||
| ＞RLC info | MP | RLC info MBMS 10.3.4.23a | REL-6 | ||
| TrCh information for each TrCh | MP | 1 to <maxMBMS -CommonTr Ch> | REL-6 | ||
| ＞Transport channel identity | MP | MBMS Common TrCh identity 10.3.9a.4 | REL-6 | ||
| ＞TFS | MP | Transport format set 10.3.523 | REL-6 | ||
| TrCh information for each CCTrCh | OP | 1 to <maxMBMS -CommonC CTrCh> | The list needs not include the CCTrCh for which the default TFCS for MBMS applies，as specified in subclause 14.10.1. | REL-6 | |
| ＞CCTrCH identity | MP | MBMS Common CCTrCh identity 10.3.9a.1 | REL-6 | ||
| ＞TFCS | MP | Transport format combination set 10.3.5.20 | REL-6 |
| PhyCh information | MP | 1 to <maxMBMS -CommonP hyCh> | REL-6 | ||
| ＞PhyCh identity | MP | MBMS Common PhyCh identity 10.3.9a.2 | REL-6 | ||
| ＞Secondary CCPCH info MBMS | MP | Secondary CCPCH info MBMS 10.3.6.71a | REL-6 | ||
| Frequency list | MP | 1 to <maxMBM S-frenquen cy-lcr> | List of frequency | ||
| ＞Frequency info | OP | Frequency info 10.3.6.36 | Frequency point information | ||
| ＞Timeslot list | OP | 1 to <maxTS> | The time slot tabulation | ||
| ＞＞Timeslot Number | MP | Timeslot Number 10.3.6.84 | Timeslot number | ||
| ＞＞Cell Parameters ID | MP | Cell Parameters ID 10.3.6.36 | The cell parameter sign, the scrambling code information of in the UTN time slot, using |
Table 2 (overstriking person is for newly-increased in the table)
Table 3 (overstriking person is for newly-increased in the table)
In the TD-SCDMA system, receive the process of MBMS business, may further comprise the steps in the single-slot network mode:
Step 210, UE preserves the UTN configuration information of receiving from the MCCH channel;
Step 220, UE receives the MBMS data according to described UTN configuration information on follow-up SCCPCH physical channel.
The frequency time slot of which transmission MBMS business has adopted the UTN mode to UE according to disposing as can be known, and know the used scrambler of frequency time slot that has disposed UTN, no matter how scrambling sends network side, UE receives wireless signal on these time slots, adopt the scrambler that is disposed that the MBMS data are carried out scramble process, and on the time slot that does not dispose UTN, use cell scrambling.
The MBMS service needed of UTN pattern occupies a plurality of time slots and forms multi-slot signal when emission, to adding different scramblers on the adjacent time slot, when the MBMS of UTN pattern service needed occupies two time slots, can use two kinds of different scrambling codes, as shown in Figure 2.When the MBMS of UTN pattern service needed occupies two above time slots, the mode that is used alternatingly two kinds of different scrambling codes can be preferably adopted, as shown in Figure 3, the scrambler difference that adjacent time-slots is used can be realized like this, and only need take two scramblers, can save needs configuration scrambler number.In other embodiments, also can recycle a plurality of different scramblers.
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 (9)
1, adopt the system of single-slot network UTN transmitting-receiving multimedia broadcast-multicast service MBMS among a kind of TD-SCDMA, comprise radio network controller, Node B and subscriber equipment, it is characterized in that:
Described radio network controller, be used for sending the UTN configuration information to subscriber equipment, described UTN configuration information comprises frequency point information, time slot and UTN scrambler, UTN scrambler of each time slot configuration for described carrying MBMS business, and and Node B between set up the less important Common Control Physical Channel SCCPCH of carrying MBMS business, and dispose the UTN scrambler for Node B;
Described Node B is used for setting up described SCCPCH with radio network controller, adopts the UTN scrambler of described configuration that the MBMS data are carried out sending after the scrambling;
Described subscriber equipment is used to receive described UTN configuration information, receives the MBMS business datum of corresponding frequency time slot then on described SCCPCH according to the described UTN configuration information that receives.
2, the system as claimed in claim 1, it is characterized in that, described radio network controller by the MBMS point to the public point to multi-point wireless bearer messages of the MBMS on the multiple spot control channel, be MBMS Common p-t-m RB Information, the perhaps general message of MBMS, be MBMSGeneral Information, perhaps MBMS current area P-T-M wireless loading message, be MBMSCurrent Cell P-t-m RB Information, perhaps system message, be system information, described UTN configuration information is sent to subscriber equipment.
3, the system as claimed in claim 1 is characterized in that, described radio network controller is set up described SCCPCH by setting up message to Node B transmission Common transport channel; Described radio network controller be Node B configuration UTN scrambler one of in the following ways:
Radio network controller is the time slot configuration UTN scrambler at described SCCPCH place, and at this moment, described Common transport channel is set up and carried time slot and UTN scrambler in the message;
Radio network controller is every described SCCPCH configuration UTN scrambler, and the identical UTN sign indicating number of the configuration of the SCCPCH in the same time slot, and at this moment, described Common transport channel is set up and carried the UTN scrambler in the message.
Radio network controller is UTN scrambler of each coded combination transmission channel configuration.
4, the system as claimed in claim 1 is characterized in that, the described UTN scrambler in the described UTN configuration information is pressed the time slot configuration.
5, system as claimed in claim 4 is characterized in that, described frequency point information is used to indicate the frequency that needs dispose the time slot place of UTN scrambler.
6, system as claimed in claim 5 is characterized in that, described frequency point information is concrete value of frequency point, perhaps points to an index that has the list entry of frequency, perhaps points to an ident value that has the list entry of frequency.
7, system as claimed in claim 4 is characterized in that, when described subscriber equipment received the MBMS business datum, the UTN scrambler carried out scramble process to the MBMS business datum on the corresponding frequency time slot in the described configuration information that employing earlier receives.
8, the system as claimed in claim 1 is characterized in that, when described MBMS service needed occupied a plurality of time slot, described radio network controller was a plurality of differences of time slot configuration of carrying MBMS business or identical UTN scrambler.
9, system as claimed in claim 8 is characterized in that, when described radio network controller during for a plurality of different UTN scrambler of the time slot configuration of carrying MBMS business, described Node B recycles the scrambler that is disposed described MBMS data are carried out scrambling.
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| CN105024778B (en) * | 2014-04-16 | 2018-08-10 | 普天信息技术有限公司 | The method for scrambling of down channel |
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