CN101272526B - Service data transmission method, communication system, base station and user device - Google Patents
Service data transmission method, communication system, base station and user device Download PDFInfo
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Abstract
The invention relates to the communication field, in particular to a business data transmitting method, a communication system, a base station, and a server device for balancing the reliability of each bit in the transmitted MBMS data. In two or more than two adjacent districts adopting different constellation editions of the invention, the constellation restructuring and modulation are implemented on the data of multimedia broadcast or multicast business MBMS according to the corresponding constellation editions, and the business data is synchronously transmitted; data transmitted by at least two districts are received by the UE; the unite decoding is implemented on the received data according to the carried constellation edition after the resolution constellation combination. By adopting the technical scheme of the invention, the reliability of each bit in the transmitted MBMS data can be balanced.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of service data transmission method, communication system, base station and subscriber equipment.
Background technology
In various mobile Packet Services; Comprise that business such as video request program, television broadcasting, video conference, online education, interactive game have a principal character; The a plurality of users that subscribe to this business exactly receive identical data simultaneously; And this professional compares with general data, often have that the concurrent user is many, data volume greatly, characteristics such as longer duration, delay sensitive.Obviously, this type business still being continued to use common point-to-point transmission method, is very inefficient for the mobile communications network of resource scarcity.For this reason, 3GPP (third generation collaborative project) introduces MBMS (Multimedia Broadcast Multicast Service, multimedia broadcasting and multicast service) technology to the transmission demand of this type broadcasting and multicast service at Release 6.In the MBMS technology, a data source can be sent to a plurality of users simultaneously and a little arrived the multiple spot data, and realizes that effectively Internet resources are shared, comprises that mobile core network and access network resource are shared, especially air interface resource.
Because the data traffic of MBMS business is big, the duration is longer; For saving interface-free resources; UMTS (Universal Mobile Telecommunication System; UMTS) network has been introduced the logic channel of new support point to multicast communication to the MBMS business; Be MTCH (MBMS Point-to-multipoint Traffic Channel, MBMS point-to-multipoint service channel), MCCH (MBMS Point-to-multipoint Control Channel, the MBMS point is to the multiple spot control channel) and MSCH (MBMS Point-to-multipoint Scheduling Channel; The MBMS point is to multiple spot control scheduling channel), be respectively applied for and carry the professional transmitting scheduling information of MBMS business datum, control information and MBMS.The transmission channel of above-mentioned three logic channels is FACH (Forward Access Channel; Forward access channel); FACH then goes up transmission at down physical channel S-CCPCH (Secondary Common Control Physical Channel, Secondary Common Control Physical Channel).Fig. 1 shows the frame structure of S-CCPCH, and wherein, a radio frames comprises 15 time slots (Slot), and the time span T of this frame
fBe 10ms, each time slots length T
SlotBe 2560 chips (chips), 20*2
kBit (bits).The content of transmitting in each time slot comprises TFCI (Transport Format Combination Index; The transformat combination indication), data (Data) and three fields of dedicated pilot (Pilot); Each fields account is used corresponding bit number; Wherein, TFCI is used to indicate this S-CCPCH to go up the information such as transformat of the transmission block of transmission.
Because a plurality of users receive identical data simultaneously among the MBMS, therefore one receives the professional UE (User Equipment, subscriber equipment) of MBMS; Not only can receive the professional S-CCPCH channel of carrying MBMS of this sub-district; Also can receive the professional S-CCPCH channel of carrying MBMS of adjacent sub-district, the point of MBMS is supported two kinds of receive modes in multicast communication, and promptly selectivity merges mode and soft merging mode; Typically, soft merging mode has more performance than selectivity merging mode.
In the existing multimedia broadcasting and multicast transmission method, S-CCPCH only supports QPSK (Quadrature Phase Shift Keying, QPSK) modulation system, and code check is lower, so spectrum utilization efficiency is lower.In order to improve the professional spectrum efficiency of MBMS; Wherein a kind of effective and efficient manner is to make S-CCPCH support 16QAM (Quadrature Amplitude Modulation; Quadrature amplitude modulation) modulation, this also is the viewpoint that many companies all support in 3GPP standard evolution process.When adopting the 16QAM modulation, the input bit when carrying out constellation mapping is with v
k, v
K+1, v
K+2, v
K+3Be one group, wherein, k mod4=1, promptly k is 1 divided by 4 remainders, k is a positive integer, wherein, preceding two the bit v in every group of input bit
k, v
K+1Represent the I road component of respective constellation point and the symbol of Q road component (being positive and negative situation) respectively, and latter two bit v
K+2, v
K+3The amplitude of representing the I road component and the Q road component of respective constellation point respectively, when concrete the realization, preceding two the bit v in every group of input bit
k, v
K+1Reliability when carrying out constellation mapping is than latter two bit v
K+2, v
K+3Reliability higher.And when in the MBMS business, adopting the 16QAM modulation at present, constellation mapping is carried out according to the input sequence of this business datum in each sub-district when identical MBMS business datum is modulated; So, in each sub-district, all the reliability than latter two bit is higher for the reliability of preceding two bits in every group of input bit; Like this; UE even receive the data of a plurality of adjacent cell transmission simultaneously, also can't promote the reliability of latter two bit in every group of input bit when obtaining these data; The reliability of each bit in every group of data of balance how is that those skilled in the art hope the problem that solves.
Summary of the invention
The embodiment of the invention provides a kind of service data transmission method, communication system, base station and subscriber equipment, in order to the reliability of each bit in the MBMS data of balance transmission.
In order to solve the problems of the technologies described above, the embodiment of the invention provides a kind of service data transmission method, may further comprise the steps:
Adopting more than two in the neighbor cell of various constellations version; Part sub-district in each neighbor cell has the multimedia broadcasting or the multicast service MBMS data of different constellation version; The part sub-district has the multimedia broadcasting or the multicast service MBMS data of identical constellation version in addition; According to corresponding constellation version multimedia broadcasting or multicast service MBMS data are carried out constellation reorganization and modulation respectively, and said business datum is carried out synchronous transmission;
Subscriber equipment receives the data of a plurality of said cell transmission, the data that receive is carried out multipath respectively by the sub-district merge; The data from different districts to constellation version is identical are carried out the high specific merging first time earlier after multipath merges; To the data after the merging of the constellation version mutually different first time of high specific; Separate the constellation reorganization according to corresponding constellation version respectively, the data of separating after constellation is recombinated are carried out the high specific merging second time and carried out channel-decoding;
Said subscriber equipment obtains the constellation version information of data through following manner:
Obtain the indicated constellation version of constellation version dispensing unit during the auxiliary CCCH S-CCPCH of adjacent sub-district tabulates in the P-T-M wireless loading information of the adjacent sub-district of MBMS in the radio resource control information;
Obtain the constellation version that adopt this indicated sub-district of constellation version configuration information unit in the tabulation of the S-CCPCH in the MBMS current area P-T-M wireless loading information in the radio resource control information;
Obtain the message common transport channel of node B application part and set up the constellation version that adopt this indicated sub-district of modulation system information unit among the S-CCPCH that asks.
The embodiment of the invention also provides a kind of subscriber equipment, and said subscriber equipment comprises the receiver module and second processing module, wherein:
Said receiver module is used to receive the multimedia broadcasting or the multicast service MBMS data of at least two neighbor cell synchronous transmission, and said sub-district is carried out the constellation reorganization according to different constellation version to said business datum respectively;
Said second processing module comprises:
Multipath merges module, and the data that are used for receiver module is received are by sub-district multipath merging and output respectively;
Second merges module, is used for that the identical data from different districts of constellation version that multipath merges module output are carried out high specific and merges and export to and separate the constellation recombination module;
Separate the constellation recombination module, the data that are used for that the second merging module is exported are separated the constellation reorganization by the sub-district according to corresponding constellation version and are exported;
First merges module, is used for the data of separating after constellation is recombinated are carried out high specific merging and output;
Decoder module is used for the data of the first merging module output are carried out channel-decoding.
In embodiments of the present invention; Utilize two or more neighbor cell synchronous transmission MBMS data; In each sub-district, according to different constellation version business datum is carried out carrying out modulation transmissions again after the constellation reorganization respectively, can the MBMS data of balance transmission in the reliability of each bit.
Description of drawings
Fig. 1 is the frame structure sketch map of S-CCPCH;
Fig. 2 is the flow chart of MBMS data transmission procedure in the embodiment of the invention mode one;
Fig. 3 is that an instance UE of embodiment of the invention mode one receives the sketch map of handling the MBMS data;
Fig. 4 receives the follow-up processing flow figure of MBMS data for UE in the embodiment of the invention mode two;
Fig. 5 is that an instance UE of embodiment of the invention mode two receives the sketch map of handling the MBMS data;
Fig. 6 is a communication system block diagram in the embodiment of the invention;
Fig. 7 is a base station block diagram in the embodiment of the invention;
Fig. 8 is a subscriber equipment block diagram in the embodiment of the invention.
Embodiment
In the embodiment of the invention; Adopt in the neighbor cell of various constellations version at two or more; According to corresponding constellation version multimedia broadcasting or multicast service MBMS data are carried out constellation reorganization and modulation respectively, and this business datum is carried out synchronous transmission;
Subscriber equipment receives the data of at least two above-mentioned cell transmission, the data that receive is separated carry out combined decoding after constellation is recombinated.
Below in conjunction with accompanying drawing the embodiment of the invention is done description further.
In the present embodiment, both can make each sub-district of MBMS transmission data all adopt different CV (Constellation version, constellation version) respectively, and can make in each sub-districts of MBMS transmission data a part of sub-district adopt different CV again.For example:
Mode one
In mode one; Adopt the common down channel transmission when putting the MBMS of multicast communication; For the situation of each cell synchronizing, each neighbor cell all adopts different CV modes to send the MBMS data that a little arrive multiple spot on this common down channel respectively, promptly at same TTI (Transmission Time Interval; Transmission Time Interval), the point of adjacent different districts transmission adopts different constellation version to carry out carrying out modulation transmissions again after the constellation reorganization respectively in the MBMS data of multiple spot.UE can receive only this common down channel of putting the MBMS data of multiple spot of carrying of one of them sub-district (like the strongest sub-district of pilot tone) and independently decode; Also can receive simultaneously a plurality of neighbor cells carrying this put the common down channel of the MBMS data of multiple spot, through the soft merging of respective cell signal being realized this is put the reception of the MBMS of multiple spot.
In mode one, each different CV is as shown in table 1:
Table 1
Wherein, the input bit sequence of packets of 16QAM constellation reorganization, every group bit is v
k, v
K+1, v
K+2, v
K+3, k mod 4=1.Being designated 0 CV representes by list entries v
k, v
K+1, v
K+2, v
K+3Directly carry out constellation mapping, be designated 1 CV and represent that be v to list entries as location swap
K+2, v
K+3, v
k, v
K+1Laggard planet seat mapping.Being designated 2 CV representes list entries v
k, v
K+1, v
K+2, v
K+3Constellation mapping is carried out after two negates again in the back, is designated 3 CV and representes that be v to list entries as location swap
K+2, v
K+3, v
k, v
K+1And, wherein, carry out the position that inversion operation can change mapped constellation points to the laggard planet seat mapping of back two negates.
In mode one; UE receive simultaneously a plurality of neighbor cells carrying this put under the situation of common down channel of MBMS data of multiple spot; Realize this is put under the situation of reception of MBMS of multiple spot through soft merging to the respective cell signal; The flow process of this transmission course is as shown in Figure 2, may further comprise the steps:
Step S101, the base station is carried out constellation reorganization and modulation to the MBMS data, and is carried out synchronous transmission according to the different CV of each neighbor cell configuration;
Modulation in this step comprises constellation mapping.
Step S102, UE receive the data of at least two above-mentioned neighbor cell transmission;
Step S103, UE merges the data that receive by sub-district difference multipath, and the data after the multipath merging are separated the constellation reorganization by the sub-district;
Data combination after step S104, UE recombinate constellation gets up to carry out combined decoding.
With the mode that data combination gets up to adopt high specific to merge, then the data that combine are carried out channel-decoding.
It is thus clear that because when adopting above-mentioned flow process to carry out the MBMS transfer of data, each sub-district is in the capable again modulation transmissions of the advanced planet seat reorganization of transmitting terminal, therefore, for different sub-districts, carrying out constellation mapping at transmitting terminal is that two higher bits of reliability possibly be v
k, v
K+1, v
K+2, v
K+3In any two bits or its distortion (the for example numerical value after the negate), so, at receiving terminal when the data combination after the constellation reorganization is got up, v
k, v
K+1, v
K+2, v
K+3The unfailing performance of corresponding output bit accesses balance effectively, rather than v
k, v
K+1The reliability of corresponding output bit is apparently higher than v
K+2, v
K+3Corresponding output bit.
In an instance of mode one, as shown in Figure 3, in this example; Be designated 1 sub-district (being called for short sub-district 1) and adopt and be designated 0 CV (being called for short CV0) and carry out the constellation reorganization, be designated 2 sub-district (being called for short sub-district 2) and adopt and be designated 1 CV (being called for short CV1) and carry out the constellation reorganization, UE receives the data that are designated 1 cell transmission and the data that are designated 2 cell transmission simultaneously; Be designated 0 CV and be designated 1 CV owing to adopt respectively; Therefore, from be designated the data that 1 sub-district receives, v
k, v
K+1Reliability compare v
K+2, v
K+3Reliability high, and from be designated the data that 2 sub-district receives, v
K+2, v
K+3Reliability compare v
k, v
K+1Reliability high, so, to the data that receive by the sub-district respectively multipath merge conciliate constellation reorganization operation after, carrying out high specific when merging, just can obtain the suitable v of reliability
k, v
K+1, v
K+2, v
K+3, successfully balance the reliability of each bit.
Mode two
In mode two; Adopt the common down channel transmission when putting the MBMS of multicast communication; Situation for each cell synchronizing; At same TTI; Send with the constellation recombination form on this common down channel part sub-district in each neighbor cell has the MBMS data block of the point of various constellations version to multiple spot, and point with the identical constellation version MBMS data block to multiple spot is sent in the part sub-district on this common down channel in addition, and user terminal can receive only this common down channel of putting the MBMS data of multiple spot of carrying of one of them sub-district (like pilot tone sub-district the most by force) and independently decode; Also can receive simultaneously a plurality of neighbor cells carrying this put the common down channel of the MBMS data of multiple spot, through the soft merging of respective cell signal being realized this is put the reception of the MBMS of multiple spot.
In mode two; UE receive simultaneously a plurality of neighbor cells carrying this put under the situation of common down channel of MBMS data of multiple spot; Realize this is put under the situation of reception of MBMS of multiple spot through the soft merging to the respective cell signal, UE can carry out subsequent treatment to step S104 according to step S103 in the mode one.Also can carry out subsequent treatment according to flow process as shown in Figure 4:
Step S201 judges in the data that receive, and whether has the identical data from different districts of CV, if carry out step S202; Otherwise, carry out step S203;
Step S202 carries out high specific to the identical data from different districts of CV and merges;
Step S203 separates the constellation reorganization respectively to the mutually different data of CV;
Step S204 carries out the high specific merging and carries out channel-decoding the data of separating after constellation is recombinated.
It is thus clear that; When adopting flow process shown in Figure 4 to handle; The data that receive from the identical sub-district of CV of adopting are carried out a high specific earlier after multipath merges merge; Then can separate the constellation reorganization to the data that receive from each sub-district respectively, thereby reduce the number of times of understanding the constellation reorganization, this also is a kind of more excellent reception handling process.
In an instance of mode two; As shown in Figure 5; In this example, be designated 1 sub-district and adopt and be designated 0 CV and carry out the constellation reorganization, be designated 2 sub-district and also adopt and be designated 0 CV and carry out the constellation reorganization; Be designated 3 sub-district and adopt and be designated 4 CV and carry out the constellation reorganization, be designated 4 sub-district and also adopt and be designated 4 CV and carry out the constellation reorganization.Data and mode one that UE receives these four cell transmission simultaneously are similar, and employing mode two also can obtain the suitable v of reliability
k, v
K+1, v
K+2, v
K+3, successfully balance the reliability of each bit.
When concrete the realization, can adopt multiple mode to carry the constellation version that adopt the sub-district, for example:
Mode A
In existing MBMS technology, UE receives in order to carry out selectivity merging mode or soft merging mode, needs to receive " the MBMS in relevant RRC (Ratio Resource Control, the Radio Resource control) message
NEIGHBOURING CELL P-T-M RB INFORMATION (MBMS adjacent sub-district P-T-M wireless loading information) " information, from this information, obtain to carry out the configuration information of S-CCPCH channel that corresponding merging receives the carrying MBMS business datum of required adjacent sub-district.In order to support in the present embodiment transmission plan based on the soft merging of constellation version; Can in this message, increase new IE (Information Element; Information unit), so that adopt UE based on the soft merging of constellation version of present embodiment can obtain to carry out the constellation version information of S-CCPCH channel that corresponding merging receives the carrying MBMS business datum of required adjacent sub-district.
In the instance of mode A; Increase new IE " CV Configuration (configuration) " among the IE in " MBMS NEIGHBOURING CEL P-T-M RB INFORMATION " information " Neighbouring cell ' s S-CCPCH list (the Secondary Common Control Physical Channel tabulation of adjacent sub-district) "; The typical span of this IE is 0～3 integer; Wherein, this IE is used to the constellation version of indicating this neighbour sub-district to be adopted.
Mode B
In existing MBMS technology; UE receives in order to carry out selectivity merging mode or soft merging mode; Need to receive " MBMS CURRENT CELL P-T-M RBINFORMATION (MBMS current area P-T-M wireless loading the information) " information in the relevant RRC message, from this information, obtain to carry out the configuration information of S-CCPCH channel that corresponding merging receives the carrying MBMS business datum of required current area.In order to support the transmission plan in the present embodiment based on the soft merging of constellation version; Can in this message, increase new IE, so that adopt UE based on the soft merging of constellation version of present embodiment can obtain to carry out the constellation version information of S-CCPCH channel that corresponding merging receives the carrying MBMS business datum of required adjacent sub-district.
In the instance of mode B; Increase new IE " CVConfiguration " among the IE " S-CCPCH list (tabulation) " in " MBMS CURRENT CELL P-T-M RBINFORMATION " information; The typical span of this IE is 0～3 integer; Wherein, this IE is used to indicate and deserves the constellation version that adopt preceding sub-district.
Mode C
Message " COMMON TRANSPORT CHANNEL SETUP REQUEST (common transport channel is set up request) " at NBAP (Node B Application Part, node B application part) needs to increase the modulation system that an IE indicates the S-CCPCH channel.In the instance of mode C; Increase IE " Modulation scheme (modulation system) " among the IE " S-CCPCH " in " COMMON TRANSPORT CHANNEL SETUP REQUEST " message; The typical span of this IE is 0～1 integer; Wherein, this IE is used to the modulation system of indicating this S-CCPCH to adopt.Typically, the BPSK modulation system is adopted in 0 expression, and the 16QAM modulation system is adopted in 1 expression.
Communication system in the embodiment of the invention, as shown in Figure 6, comprise base station 100 and subscriber equipment 200, wherein:
This base station 100 can also utilize this business datum of cell synchronizing transmission that adopts identical constellation version with each sub-district.
Multipath merges module 221, and the data that are used for receiver module 210 is received are by sub-district multipath merging and output respectively;
Separate constellation recombination module 222, be used for the data after the multipath merging are separated constellation reorganization and output by the sub-district according to corresponding constellation version;
First merges module 223, is used for and will separates data after the constellation reorganization and carry out that high specific merges and output;
In sum; Adopt the technical scheme of the embodiment of the invention; Adopt in the neighbor cell of various constellations version at two or more; According to corresponding constellation version multimedia broadcasting or multicast service MBMS data are carried out constellation reorganization and modulation respectively, and this business datum is carried out synchronous transmission; UE receives the data of at least two above-mentioned cell transmission, the data that receive is separated carry out combined decoding after constellation is recombinated.The reliability of each bit in can the MBMS data of balance transmission.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (2)
1. a service data transmission method is characterized in that, may further comprise the steps:
In plural neighbor cell; Part sub-district in each neighbor cell has the multimedia broadcasting or the multicast service MBMS data of different constellation version; The part sub-district has the multimedia broadcasting or the multicast service MBMS data of identical constellation version in addition; According to corresponding constellation version said MBMS data are carried out constellation reorganization and modulation respectively, and said business datum is carried out synchronous transmission;
Subscriber equipment receives the data that a plurality of said neighbor cells send simultaneously, the data that receive is carried out multipath respectively by the sub-district merge; The data from different districts to constellation version is identical are carried out the high specific merging first time earlier after multipath merges; To the data after the merging of the constellation version mutually different first time of high specific; Separate the constellation reorganization according to corresponding constellation version respectively, the data of separating after constellation is recombinated are carried out the high specific merging second time and carried out channel-decoding; Said subscriber equipment obtains the constellation version information of data through following manner:
Obtain the indicated constellation version of constellation version dispensing unit during the auxiliary CCCH S-CCPCH of adjacent sub-district tabulates in the P-T-M wireless loading information of the adjacent sub-district of MBMS in the radio resource control information;
Obtain the constellation version that adopt this indicated sub-district of constellation version configuration information unit in the tabulation of the S-CCPCH in the MBMS current area P-T-M wireless loading information in the radio resource control information;
Obtain the message common transport channel of node B application part and set up the constellation version that adopt this indicated sub-district of modulation system information unit among the S-CCPCH that asks.
2. a subscriber equipment is characterized in that, said subscriber equipment comprises the receiver module and second processing module, wherein:
Said receiver module is used to receive the multimedia broadcasting or the multicast service MBMS data of at least two neighbor cell synchronous transmission, and said sub-district is carried out the constellation reorganization according to different constellation version to said business datum respectively;
Said second processing module comprises:
Multipath merges module, and the data that are used for receiver module is received are by sub-district multipath merging and output respectively;
Second merges module, is used for that the identical data from different districts of constellation version that multipath merges module output are carried out high specific and merges and export to and separate the constellation recombination module;
Separate the constellation recombination module, the data that are used for that the second merging module is exported are separated the constellation reorganization by the sub-district according to corresponding constellation version and are exported;
First merges module, is used for the data of separating after constellation is recombinated are carried out high specific merging and output;
Decoder module is used for the data of the first merging module output are carried out channel-decoding.
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| CN101888595B (en) * | 2010-06-29 | 2013-04-17 | 北京邮电大学 | Method for selecting and soft combining multi-cell signals in multicast broadcast single frequency network |
| CN105450367A (en) * | 2014-09-01 | 2016-03-30 | 电信科学技术研究院 | Method and apparatus for data transmission |
| CN104283644B (en) * | 2014-11-03 | 2018-06-19 | 大唐移动通信设备有限公司 | A kind of data decoding method and equipment of uplink collaboration multiple spot |
| CN106241672B (en) * | 2016-08-12 | 2018-08-21 | 龙合智能装备制造有限公司 | Accessory Automatic adjustment method and device |
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| CN1620775A (en) * | 2002-10-18 | 2005-05-25 | 松下电器产业株式会社 | Constellation resetting of transmitting diversity scheme |
| WO2006137594A1 (en) * | 2005-06-23 | 2006-12-28 | Nec Corporation | Mbms soft combining |
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| CN1620775A (en) * | 2002-10-18 | 2005-05-25 | 松下电器产业株式会社 | Constellation resetting of transmitting diversity scheme |
| WO2006137594A1 (en) * | 2005-06-23 | 2006-12-28 | Nec Corporation | Mbms soft combining |
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| 3rd Generation Partnership Project.Technical Specification Group Radio Access Network |
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