CN101674604B - Method for transmitting circuit switched domain service, network equipment and terminal equipment - Google Patents
Method for transmitting circuit switched domain service, network equipment and terminal equipment Download PDFInfo
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- CN101674604B CN101674604B CN2008101985876A CN200810198587A CN101674604B CN 101674604 B CN101674604 B CN 101674604B CN 2008101985876 A CN2008101985876 A CN 2008101985876A CN 200810198587 A CN200810198587 A CN 200810198587A CN 101674604 B CN101674604 B CN 101674604B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
Abstract
The invention discloses a method for transmitting circuit switched domain service, network equipment and terminal equipment. The method comprises the following steps: establishing block scheduling based connection for the circuit switched domain service; and scheduling the circuit switched domain service at an air interface in a block scheduling mode, multiplexing the circuit switched domain service according to the scheduling and then transmitting, or multiplexing the circuit switched domain and packet switched domain service and then transmitting. The technical scheme multiplexes the circuit switched domain service to the packet switched domain, improves the utilization rate of channel resources, improves network capacity and throughput, and realizes resource sharing of the circuit switched domain and the packet switched domain.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of transmitting circuit switched domain, the network equipment and terminal equipment.
Background technology
Existing global system for mobile communications (Global System For Mobile Communication, GSM) the parallel circuit switching domain (Circuit Switch, CS) and packet-switched domain (Packet Switch, PS) two kinds of business; Speech business is all transmitted through the CS territory.The second layer (L2) of CS territory in the network hierarchy structure adopts the LAPDm agreement, and monopolizes channel, and every time slot carries two speech businesses at most; The PS territory L2 adopt Radio Link control (Radio Link Control, RLC)/medium access control (Medium Access Control, MAC) agreement.
In the invention process, the inventor finds that there is following problem at least in background technology:
Carry out voice transfer in the existing gsm system all based on the CS territory, the mode of monopolizing channel is used in the transmission of speech frame, causes the waste of channel resource and the bottleneck of network capacity.
Summary of the invention
Technical problem to be solved by this invention is, a kind of transmitting circuit switched domain, the network equipment and terminal equipment are provided, and realization to the PS territory, reduces the waste of channel resource with CS territory service integration.
For this reason, on the one hand, embodiments of the invention provide a kind of transmitting circuit switched domain, comprising: for circuit switched domain service is set up the connection based on block dispatching; Circuit switched domain service is carried out Radio Link control coding; Or circuit switched domain service carried out new chnnel coding, said new chnnel coding is included in the traffic frame form of circuit switched domain service and inserts uplink state sign USF or insert temporary flow identity TFI simultaneously; Circuit switched domain service behind the coding is being eated dishes without rice or wine to carry out time division multiplexing dispatching with the block dispatching mode; Circuit switched domain service behind the said coding is carried out transmitting after the time division multiplexing, and circuit switched domain service after maybe will encoding and grouping commutative field service carry out transmitting after the time division multiplexing.
On the other hand, embodiments of the invention provide a kind of network equipment, comprising: set up the unit, be used to circuit switched domain service and set up the connection based on block dispatching, so that circuit switched domain service is carried on the packet-switched domain network; Scheduling unit; Said circuit switched domain service after being used for encoding is eating dishes without rice or wine to carry out time division multiplexing dispatching with the block dispatching mode; Said circuit switched domain service behind the coding is carried out in said connection, transmitting after the time division multiplexing, the circuit switched domain service after maybe will encoding with on said the connection, transmit after grouping commutative field service carries out time division multiplexing;
Wherein, said scheduling unit comprises:
The first coding submodule is used for said circuit switched domain service is carried out Radio Link control coding;
Or/and,
The second coding submodule; Be used for said circuit switched domain service is carried out chnnel coding; Said signal encoding comprises that the traffic frame to circuit switched domain service carries out the circuit commutative field coding, and in said traffic frame, inserts uplink state sign USF or insert temporary flow identity TFI simultaneously.
Simultaneously, embodiments of the invention provide a kind of terminal equipment, comprising: codec unit is used for the circuit switched domain service frame in the packet-switched domain transmission is carried out encoding and decoding; Discrimination unit is used for the business of descending reception is carried out circuit commutative field and/or grouping commutative field service differentiation, and obtains the corresponding business content through the decoding of codec unit; Transmitting element is used for the uplink state sign USF that correct decoding obtains, and sends the uplink service through coding according to said USF;
Wherein, said codec unit comprises:
First coding/decoding module; Be used for said circuit-switched service frame is carried out channel coding/decoding; Said signal encoding comprises that the traffic frame to circuit switched domain service carries out the circuit commutative field coding, and in said traffic frame, inserts USF or insert temporary flow identity TFI simultaneously;
Or second coding/decoding module is used for the traffic frame of said circuit switched domain service is carried out Radio Link control encoding and decoding.
In the scheme that the embodiment of the invention provides since with CS territory service integration to the PS territory, realized the resource-sharing in CS territory and PS territory, improved utilization rate of channel resources, raising network capacity and throughput.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the background technology description below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention.
Fig. 1 is the map of the professional protocol stack of professional protocol stack of the CS in the embodiment of the invention and existing C S;
Fig. 2 be among the present invention transmitting circuit switched domain first specifically execute the example flow chart;
Fig. 3 be among the present invention transmitting circuit switched domain second specifically execute the example flow chart;
Fig. 4 be among the present invention transmitting circuit switched domain the 3rd specifically execute the example flow chart;
Fig. 5 is a USF coded format sketch map in the TCH FS traffic frame among the present invention;
Fig. 6 is the composition sketch map of a specific embodiment of the network equipment among the present invention;
Fig. 7 is the composition sketch map of a specific embodiment of the scheduling unit among Fig. 6;
Fig. 8 is the composition sketch map of a specific embodiment of the coding unit among Fig. 7;
Fig. 9 is the composition sketch map of a specific embodiment of terminal equipment among the present invention;
Figure 10 is the composition sketch map of a specific embodiment of codec unit among Fig. 9.
Embodiment
Below in conjunction with the corresponding accompanying drawing of the embodiment of the invention, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.
The technical scheme that the embodiment of the invention provided will be dealt with problems and comprised: carry out professional traffic frame (like speech frame or the Frame etc.) transmission of CS in the background technology all based on CS territory network; Make the transmission of traffic frame monopolize communication channel (keeping 1 or 2 audio call), cause the waste of channel resource and the bottleneck of network capacity like every time slot.
For this reason; The scheme that the use packet network carries CS territory professional (for example speech business) has been proposed in the embodiment of the invention; Protocol stack to original CS is professional is made amendment, and promptly adopts the RLC/MAC agreement to replace original LAPDm agreement at L2, and is as shown in Figure 1; The left side is the protocol hierarchy structure based on former CS territory transmitting voice service among the figure, and the right side is the protocol hierarchy structure of the professional network in the transmission CS territory in the embodiment of the invention.Wherein, in order to carrying the professional packet network in CS territory, such as can being that (GSM EDGE Radio Access Network GERAN), allows the user multiplexing in a plurality of time slots in packet domain to GSM EDGE wireless access network, also allows a plurality of users of every timeslot multiplex.
In the embodiment of the invention; Because the CS service bearer is in packet network; Therefore the CS business can adopt higher speech encoding rate, even can introduce high-order modulating such as 16QAM and 32QAM, thereby and can realize the multiplexing and resource-sharing between the CS, between the CS/PS.
First of a kind of transmitting circuit switched domain of the present invention is specifically executed the flow chart of example, and as shown in Figure 2, present embodiment comprises:
Step 201: be the professional connection of setting up in CS territory based on block dispatching;
Said CS territory business can comprise speech business, also comprises data service.In general, the block dispatching process can comprise: when the multiplexing same channel of a plurality of users, or during the multiplexing a plurality of channel of certain user, confirm by network side which user the piece resource allocation of each time slot gives in up-downgoing.Descendingly directly distributed by network, up to come each user's of assignment up resource, said connection based on block dispatching through USF can be that (Temporary Block Flow is TBF) with being connected of similar TBF for Temporary Block Flow.Concrete, promptly professional to a CS territory, eating dishes without rice or wine to set up up-downgoing TBF connection or type TBF connection; Thereby can carry out the up-downgoing scheduling to CS territory traffic frame (or the RLC/MAC piece that forms after to CS territory traffic frame coding) at network side, promptly adopt the mode of dynamic block scheduling to dispatch interface-free resources.Adopt interface-free resources dynamic dispatching CS territory professional, make a circuit switched domain service on a plurality of time slots, to transmit, perhaps a plurality of circuit switched domain services are multiplexing on identical time slot, and perhaps circuit domain business is multiplexing on identical time slot with packet switch domain service.
Step 202: said circuit switched domain service is being eated dishes without rice or wine to carry out time division multiplexing dispatching with the block dispatching mode, with said circuit switched domain service carry out after the time division multiplexing transmission in the said connection or with circuit commutative field with on said the connection, transmit after grouping commutative field service carries out time division multiplexing.Wherein, describedly eat dishes without rice or wine to be meant eating dishes without rice or wine of packet-switched domain, can not realize multiplexingly when carrying out professional transmission in the available circuit switching domain business, also can carry out eating dishes without rice or wine of time division multiplexing dispatching with regard to not existing.
CS territory business is being carried out when multiplexing; Because need be to same channel or on several channel with a plurality of service integrations; As, three business to be transmitted through two channels, each business is not a certain channel of monopolizing of use; Therefore need dispatch the transmission of a plurality of business on a plurality of channels, effectively transmit on a plurality of channels of being implemented in of a plurality of service time division multiplexes so that realize.
Wherein, the PS territory eat dishes without rice or wine to dispatch the time, follow scheduling strategy:
Carrying out uplink and downlink when scheduling, carrying out when multiplexing, preferentially carrying out CS territory business multiplexing and transmit, be about to a plurality of CS territory business and carry out transmitting after the time division multiplexing when CS and PS territory business.
Since will with CS territory service bearer in the PS territory network; So need be different from the professional coding in original CS territory to CS territory business; According to the difference of the coded system of specifically carrying out, the mode of multiplexing scheduling is difference to some extent also, describes respectively in the face of concrete situation down.
Can be based on the embodiment of the invention one, as shown in Figure 3, for CS territory business being carried out the multiplexing situation in RLC coding back, comprising:
Step 301: be the professional connection of setting up in CS territory based on block dispatching.
Step 302: CS territory business is carried out the RLC coding, wherein, through comprising USF territory and TFI territory in the CS territory business behind the RLC coding.
This step specifically can comprise:
The existing voice code rate is mapped to the RLC coded system, utilizes the remaining bits in the RLC piece,, improve link performance CS territory loaded service frame (being the CS business tine) encode (like error correction coding);
Or, to the advanced row cache packing of traffic frame, and then carry out the RLC coding and send.
Better at wireless environment, under the higher scene of reusing degree, utilize the RLC coding of two-forty, under the prerequisite that guarantees certain voice quality and delay performance, can further improve power system capacity.
Because generally, the length of the CS frame of transmission is much littler than the PS piece of transmission, in order to increase operation rate, can be with a plurality of CS frame packings, and the back transmission of encoding again.The process of respectively CS territory traffic frame being carried out the RLC coding below and packing is elaborated:
CS territory traffic frame is carried out the RLC/MAC cataloged procedure, comprising:
RLC coding to CS territory traffic frame can not revised RLC/MAC form.For the speech business that is carried on the PS network, we can adopt the affirmation pattern (promptly only retransmitting once) of perishability.(Fast Ack/Nack Reporting, FANR) technology reduce retransmitting the time delay of being brought in this process, can to use the rapid answer report equally.
Present GSM full rate (Full Rate, FR) speed of speech business is 13kbit/s, half rate (Half Rate; HR) speed of speech business is 5.6bits/s; EFR (Enhanced Full Rate, EFR) speed of speech business is 12.2kbit/s, self-adaption multi-speed encoding/decoding (Adaptive Multi-Rate Code; AMR) arrowband (Narrow Band; NB) speed is 4.75～12.2kbit/s, and (Wide Band, speed WB) is 6.60～23.85kbit/s in the AMR broadband.Can find out that (Radio Link Control, RLC) code rate is inconsistent to the control of CS speech encoding rate of the prior art and Radio Link, if directly use PS network carrying traffic frame, will certainly cause the waste and the performance decrease of bandwidth resources.
Therefore, for making full use of bandwidth, promote the link performance of RLC bearer service frame, the embodiment of the invention is utilized the remaining bits of RLC piece, and the loaded service frame is carried out error correction coding, as CRC (Cyclic Redundancy Check, CRC).
The mode of error correction coding is an example with GSM FR, and the speed of GSM FR is 13kbit/s, can select CS-2 (speed is 13.4kbit/s) or MCS-3 (speed is 14.8kbit/s) to carry the FR traffic frame.With MCS-3 is example, adds that the remaining bits number is 36 behind the traffic frame, and we can utilize this 36 bit to come the loaded service frame is done error correction coding, reaching the purpose that improves link performance, as shown in table 1:
Table 1: the RLC block structure (MCS-3) that carries the FR traffic frame
With respect to full-rate speech traffic, in the half-rate speech business, every 20ms comprises two users' traffic frame (being that every traffic frame accounts for two burst), and the HR traffic frame is carried out RLC when coding, can only carry same user's traffic frame in every 20ms data block.Therefore during to the RLC coding of HR traffic frame, descending two multiplexing HR users, every 20ms is scheduling in turn; To a certain HR user, need the HR traffic frame of the preceding 20ms of buffer memory,, be carried in the same RLC piece two traffic frame cascades then together.So can cause the 20ms time delay.
For example the speed of GSM HR is 5.6kbit/s, can select MCS-2 to carry the half-rate speech business.The RLC code rate of MCS-2 is 11.2kbit/s, just in time can be used for carrying two HR traffic frames (being shown in the following figure), and the cascade of traffic frame directly joins end to end.
Table 2: the RLC block structure (MCS-2) that carries the HR traffic frame
RLC coding to each pattern of AMR can adopt similar method.Because PS territory bandwidth is higher, when the traffic frame that carries out the CS territory (being speech frame) transmits in the PS territory, can improve AMR speech coding transmission rate.
If the multiplexing CS business of carrying out to described in the embodiment of the invention adopts Unacknowledged Mode; Then can utilize some territory in the RLC head, as the piece sequence number (Block Sequence Number, BSN) etc.; Carry the information of the link of transmission, thereby further improve the link performance of this technical scheme.
Be described below what CS territory traffic frame was packed:
The high-throughput in PS territory is its bigger advantage, particularly after GERAN evolution.Described in embodiments of the present invention carrying out on the professional basis of multiplexing CS/PS; We can utilize the two-forty in PS territory, in each RLC/MAC piece, carry more traffic frame, like this can be better at wireless environment; Under the higher scene of reusing degree; Utilize the RLC coding of two-forty, under the prerequisite that guarantees certain voice quality and delay performance, further improve power system capacity and spectrum efficiency.
With TCH FS is example, can adopt MCS-3 to carry single traffic frame.If the current scene channel quality is fine, but reusing degree is very high, and we can adopt MCS-6 to encode and carry continuous two traffic frames (being shown in the following figure).So just can vacate half the time and resource, thereby can insert more CS or PS user.As shown in table 3 for carrying out the bag to be sent after RLC encodes after packing again.
Block format (MCS-6) after the packing of table 3:TCH FS traffic frame
Step 303: the CS territory business through the RLC coding is dispatched with the block dispatching mode at wave point, and carries out the multiplexing business transmission of CS/PS according to said scheduling.
Scheduling generally includes descending scheduling (network side is called descending to the user side direction) and uplink scheduling (user side is called up to the network side direction).The scheduling strategy of these two kinds of scheduling is described respectively below.
One, descending scheduling
Because the CS customer service is transmitted in the connection based on block dispatching of setting up; (Discontinuous Transmission DTX) during mechanism, actually has only time of 40% to have data to transmit for a CS is professional such as adopt the noncontinuity emission when the CS customer service; So there is the idle time in the transmission course; Therefore, can each CS is professional, and CS is professional and the PS business is carried out multiplexing.Lifting two kinds of situation below is example, describes the flow process of concrete multiplexing scheduling.
1), the multiplexing scheduling of CS and PS
When CS and PS business being carried out when multiplexing, the principle of the professional first priority of CS is adopted in scheduling.When CS user does not have speech data and need send, just the PS downlink data block is carried out multiplexing transmission.
2), multiplexing scheduling between the CS
If network side is not supported multiplexing between the same time slot CS user, promptly do not support multiplexing between the CS business then to need not to realize the scheduling between the CS user.If network side is supported multiplexing between the same time slot CS user; Then can be with the CS service integration in a plurality of channels; (probability that multiplexing CS user on two time slots for example, 3 users converse simultaneously is that to occur the probability that 3 and above user converse simultaneously among 6.4%, 4 user be 17.92% according to the principle of statistic multiplexing; Simultaneously the little interchannel of talk probability can carry out multiplexing), allow multiplexing between the CS business.When the reusing degree on the channel group is higher, if the conflict of CS traffic frame descending scheduling can adopt the mode of buffer memory to solve.
If the CS business is half rate traffic (HR); Because in half rate traffic; Scheduling (like MAC scheduling) be every 20ms once; Need the professional traffic frame of two CS of scheduling in the 20ms, promptly each traffic frame takies two bursts (burst), tries one's best two multiplexing HR business in 20ms scheduling together in the cycle descending.Only multiplexing HR business in channel group, when not having other HR business to have data to transmit in the perhaps current 20ms, two other burst can transmit the indication of mourning in silence (Silence Descriptor, SID) frame (own or other HR is professional).
Two, uplink scheduling.
Because when having carried out the RLC coding, the USF that in traffic frame, encoded is so when carrying out uplink scheduling, can dispatch according to existing USF.
Concrete scheduling mode is following:
USF in the traffic frame of the CS territory business that the user sends is set as required, and said USF is used to indicate can be next up user who uploads traffic frame;
When the CS user side of full rate listens to the USF of oneself, can be at up transmission traffic frame or SID frame.Network side needed to dispatch its uplink service for constantly this user before receiving this user's SID frame; After network is received the SID frame, represent that this user gets into the voice quiet period, only need the up of this user of periodic scheduling to get final product, for example every 480ms dispatches once, and scheduled resources is used to transmit this user's SID or traffic frame; Other idle resource just can be distributed to other user, as the ascending resource of free time is distributed to multiplexing CS or PS user; In this case, receive this user's regular traffic frame above that, represent that then this user returns to the normal talking state, at this moment need dispatch the up of this user constantly if network side is gone.
When the CS user of half rate listens to the USF of oneself; Next up resource all belongs to this user; This just needs, and a traffic frame (each traffic frame is carried on 2 burst) and current traffic frame send in the up block period of the next one together on the user side buffer memory.That is to say the scheduling in turn between two half rate users of up resource.Similar with full rate, when two half rate user uplinks all are in quiet period, CS and PS user that then can dispatching multiplex.
Relative, as shown in Figure 4 with the situation shown in Fig. 3 based on multiplexing behind the RLC coding, be CS territory business to be different from situation about transmitting after the professional encoding and decoding in existing CS territory, corresponding flow process comprises:
401, be the professional connection of setting up in circuit switching (CS) territory based on block dispatching.
402, network side carries out new chnnel coding to CS territory business, promptly the physical layer transmission data of the traffic frame form in the business of said CS territory is encoded.Can not carry out RLC coding here, but since with CS territory service bearer in the PS territory network, so need carry out certain modification to the professional coded system in original C S territory.As, in the traffic frame form of CS territory business, insert USF, or insert TFI etc. simultaneously.
403, according to scheduling strategy said CS territory business through coding is dispatched with the block dispatching mode at the wireless mouth in packet switching PS territory, and carry out the multiplexing business transmission of CS/PS according to said scheduling.Scheduling and the embodiment among Fig. 3 in this step are similar, also comprise uplink scheduling and descending scheduling, and wherein the description of the embodiment among descending scheduling and Fig. 3 is consistent, does not do here and gives unnecessary details.Uplink scheduling is only described below:
Carry out up user's (comprising CS user and PS user) scheduling and need dispatch sign, accomplish like USF.Still prolong with uplink state sign (Uplink State Flag, USF) scheduling mode of the prior art in the PS territory.In the CS territory, need to increase in the traffic frame structure in the prior art the USF territory, promptly insert the USF territory in the traffic frame.
At Gaussian Minimum Shift-frequency Keying (Gaussian Minimum Shift-frequency Keying; GMSK) under the modulation system; 3 USF form 12 bits after coding; Therefore the space that in based on the traffic frame the coding of prior art after, needs 12 bits to be inserting USF, so that carry out the traffic frame after the new chnnel coding in the acquisition embodiment of the invention.
The first, can USF be inserted in the idle bit (for example the 13k full rate has 8 bit spare bits after the chnnel coding) before encoding.
The second, can punch to the data after the convolution code (being meant a kind of error correction coding of physical layer), thereby obtain the space of 12 bits.The USF coded format is as shown in Figure 5 in full rate speech traffic channel (Full rate Speech Traffic Channel, the TCH FS) traffic frame.
In addition, USF only need interweave (interweave and be meant again process) to the signal ordering get on to current 4 bursts (burst), and the position needs that interweave can make PS user side ability correct decoding.So no matter be PS data block or CS traffic frame, the interleaving mode of USF on 4 burst all is the same.Therefore the CS user side only need carry out deinterleaving according to the mode in CS territory, reads out USF then from corresponding position and gets final product (USF possibly intert in former and later two traffic frames like this).The USF coding and the full rate of half-rate speech business are similar, at this moment need USF be mapped in two half rate users' the traffic frame.
For having inserted the traffic frame behind the USF, the mode of describing among the concrete scheduling mode of its uplink scheduling and the embodiment of Fig. 3 is consistent, does not do here and gives unnecessary details.
Also can further comprise the step that user side is distinguished the business of receiving in the transmitting circuit switched domain in embodiments of the present invention; Be that user side is distinguished the said said CS territory business of transmitting in the PS territory that obtains, obtain CS or PS business tine.
Because network side carries out business when transmission, the CS/PS business has been carried out multiplexing, so need user terminal can distinguish above-mentioned two kinds of business, so that obtain concrete business tine at user side.The difference of the object of distinguishing as required describes above-mentioned concrete differentiation mode:
1) PS distinguish is promptly distinguished different PS business.
When CS and PS user's hybrid multiplex; Differentiation between the PS user is with of the prior art identical; Promptly because PS territory business all is process RLC encoding and decoding; Therefore still (Temporary Flow Identity TFI) indicates different PS territories professional through the temporary flow identity in the RLC/MAC head in the RLC coding.
2) CS/PS distinguish is promptly distinguished CS business and PS business.
The CS territory traffic differentiation mode that the RLC encoding and decoding transmit is following for not carrying out:
When the professional user side of PS receives the CS traffic frame, verification can occur when this traffic frame is carried out head decoding and not pass through, verification occurs when therefore the data that receive being carried out head decoding and do not pass through, then said receive be the CS business, otherwise be the PS business.This way is compatible mutually with the end side of existing support PS business.
When CS user carries out CS business and PS traffic differentiation, can distinguish the family through the frame bit steathily in the business tine.After network side is to each traffic frame or data block process coding and pulse formatization, there are 8 to steal frame bits (being that each burst has 2 frame bits steathily), as in the prior art; CS-1 (Code Scheme-1 coded system-1; Be a kind of RLC (L2) coded system of GPRS) for complete 1, CS-2 is (11001000), CS-3 is (00100001); CS-4 and MCS-1～4 are (00010110); The frame bit of stealing of TCH is complete 0, Fast Associated Control Channel (Fast Associated Control Channel, FACCH to steal the frame bit be complete 1.Therefore in embodiments of the present invention, the frame bit steathily of modification FACCH is other bit, as is 01010101, so just can distinguish CS and PS territory business through stealing the frame bit.This be because, the PS territory is professional steal the frame bit be CS-1～CS-4, MCS-1～MCS-4 steal the frame bit; The frame bit steathily of TCH and FACCH is the frame bit steathily of CS; But, CS-1 and FACCH to steal the frame bit identical, after therefore one of them being made amendment, just can distinguish CS user and PS user fully; But in order not influence old PS terminal, so need to revise the frame bit steathily of FACCH.
CS territory for the encoding and decoding through RLC are transmitted is professional, can distinguish according to the TFI territory that adds in the speech business.
3) CS distinguish is promptly distinguished different CS business.
The CS territory traffic differentiation mode that the RLC encoding and decoding transmit is following for not carrying out:
If user side does not support CS user multiplexing in same time slot, then need not distinguish CS user; Otherwise need to realize the differentiation between the CS user.The CS distinguish has 3 kinds of modes:
A, steal the frame bit, as, can define a series of frame bit sequences (8 bit) of stealing and distinguish different CS users.
B, training sequence, as, can define a series of mutually orthogonal training sequences, distinguish different CS users.
C, TFI, as, in traffic frame, add the TFI territory, distinguish different CS users.
Wherein, owing to might carry out the CRC check position, can XOR be carried out in TFI territory and 5 CRC check positions wherein, thereby TFI implicit expression is carried to receiving terminal the professional data of CS.Have some idle bits (4 bit spare bits being arranged) in some voice channels coding, also can be used for carrying TFI like the 13k full rate.
But when full rate and the same time slot of half-rate speech service integration, carry the method for TFI and then can't distinguish.Can adopt training sequence equally this moment or steal the frame bit sequence and distinguish full rate and half-rate speech business.
CS territory for the encoding and decoding through RLC are transmitted is professional, can distinguish according to the TFI territory that adds in the speech business.
Simultaneously, in the scheme that the embodiment of the invention provides,, only need carry out at rlc/mac layer to the encryption of traffic frame.Still prolong the key that issues with core net, therefore can not have influence on the normal flow of core net.Do not run business into particular one here and state.
Can know through above-mentioned description,, make that utilization rate of channel resources is improved,, can make every time slot carry 8 speech businesses as when adopting GERAN carrying CS professional owing to adopted multiplexing CS/PS professional to the embodiment of the invention.Simultaneously, circuit and Packet Service multiplexing can make the more PS of the network carrying professional, or be the more available channel of PS traffic assignments, thereby improve whole network capacity and throughput; Circuit adopts identical Um mouth L2 agreement with packet domain, has simplified network configuration, practices thrift the networking cost; And really realized the resource-sharing of circuit and packet domain, more reasonable distribution with make full use of limited channel resource; Utilize the advanced technology (like RTTI) of GERAN can promote the performance of Circuit Service simultaneously.
Accordingly, as shown in Figure 6, a kind of network equipment 2 also is provided in the embodiment of the invention, this network equipment 2 comprises:
Set up unit 20, be used to the professional connection of setting up in CS territory based on block dispatching, so as with CS territory service bearer on the network of PS territory.
Scheduling unit 22 is used for said CS territory business is dispatched eating dishes without rice or wine with the block dispatching mode, and carries out CS or/and the multiplexing business transmission of PS according to said scheduling.
As shown in Figure 7, scheduling unit 22 comprises:
Scheduler module 224; Be used for according to scheduling strategy professionally and change the territory business through the CS of coding and dispatch eating dishes without rice or wine, and carry out CS or/and the multiplexing business transmission of PS, wherein according to said scheduling with the block dispatching mode to the PS territory; Said scheduling strategy comprises; When carrying out the uplink and downlink scheduling, when CS and PS territory service integration, priority scheduling CS territory business is carried out multiplexing and transmission.
Wherein, Scheduler module 224 can further comprise: submodule 2240 is set; Be used for being provided with USF to the professional traffic frame in the CS territory that the user sends; Said USF is used to indicate can be next up user who uploads traffic frame, when the professional user in CS territory know according to the USF in the said traffic frame that receives own for can be the time next up user who uploads traffic frame, at next up transmission traffic frame or SID frame; Uplink scheduling submodule 2242 is used for carrying out uplink scheduling according to traffic frame or SID frame that the user who receives sends, after receiving the SID frame; Represent that this user gets into the voice quiet period; This user's of periodic scheduling uplink SID frame or traffic frame, and the ascending resource of free time distributed to multiplexing CS or PS user, when receiving traffic frame; Represent that this user returns to the normal talking state, at this moment need dispatch the traffic frame of this user's uplink constantly.
As shown in Figure 8, said coding module 222 can comprise one or both in following, is exemplified as two kinds of situation about all comprising among the figure:
The first coding submodule 2220 is used for said CS territory business is carried out the RLC coding, wherein, and through comprising USF territory and TFI territory in the CS territory business behind the RLC coding;
The second coding submodule 2224 is used for said CS territory business is carried out new chnnel coding, in the traffic frame form of said CS territory business, inserts USF, or inserts TFI simultaneously.。
As shown in Figure 9, be a kind of terminal equipment 4 in the corresponding embodiment of the invention, it comprises:
Transmitting element 44 is used for the uplink scheduling sign that correct decoding obtains, and sends the uplink service through coding according to said uplink scheduling sign.
Wherein, shown in figure 10, codec unit 40 can comprise:
First coding/decoding module 400 is used for said CS traffic frame is carried out new channel coding/decoding, promptly in frame format, inserts USF, or inserts TFI simultaneously;
Or second coding/decoding module 402 is used for the traffic frame of said CS territory business is carried out the RLC encoding and decoding, wherein, and through comprising USF territory and TFI territory in the CS territory business behind the RLC coding.
The noun mentioned at said system and equipment moves with relevant execution, and consistent with described in other embodiment of the present invention do not done here and given unnecessary details.
Owing to adopted multiplexing CS/PS professional, make that utilization rate of channel resources is improved, as when adopting GERAN carrying CS professional, can make every time slot carry 8 speech businesses.Simultaneously, circuit and Packet Service multiplexing can make the more PS of the network carrying professional, or be the more available channel of PS traffic assignments, thereby improve whole network capacity and throughput; Circuit adopts identical Um mouth L2 agreement with packet domain, has simplified network configuration, practices thrift the networking cost; And really realized the resource-sharing of circuit and packet domain, more reasonable distribution with make full use of limited channel resource; Utilize the advanced technology (like RTTI) of GERAN can promote the performance of Circuit Service simultaneously.
Device embodiment described above only is schematic; Wherein said unit as the separating component explanation can or can not be physically to separate also; The parts that show as the unit can be or can not be physical locations also; Promptly can be positioned at a place, perhaps also can be distributed on a plurality of NEs.Can realize the purpose of present embodiment scheme according to the needs selection some or all of module wherein of reality.Those of ordinary skills promptly can understand and implement under the situation of not paying performing creative labour.
Through the description of above execution mode, those skilled in the art can be well understood to each execution mode and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware.Based on such understanding; The part that technique scheme contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product can be stored in the computer-readable recording medium, like ROM/RAM, magnetic disc, CD etc., comprises that some instructions are with so that a computer equipment (can be a personal computer; Server, perhaps network equipment etc.) carry out the described method of some part of each embodiment or embodiment.
Above-described execution mode does not constitute the qualification to this technical scheme protection range.The modification of being done within any spirit and principle at above-mentioned execution mode, be equal to replacement and improvement etc., all should be included within the protection range of this technical scheme.
Claims (11)
1. a transmitting circuit switched domain is characterized in that, said method comprises:
For circuit switched domain service is set up the connection based on block dispatching;
Circuit switched domain service is carried out Radio Link control coding; Or circuit switched domain service carried out new chnnel coding, said new chnnel coding is included in the traffic frame form of circuit switched domain service and inserts uplink state sign USF or insert temporary flow identity TFI simultaneously;
Circuit switched domain service behind the coding is being eated dishes without rice or wine to carry out time division multiplexing dispatching with the block dispatching mode; Circuit switched domain service behind the said coding is carried out transmitting after the time division multiplexing, and circuit switched domain service after maybe will encoding and grouping commutative field service carry out transmitting after the time division multiplexing.
2. the method for claim 1 is characterized in that, said circuit switched domain service behind the said coding is carried out transmitting after the time division multiplexing, and circuit switched domain service after maybe will encoding and grouping commutative field service carry out transmitting after the time division multiplexing and comprise:
When circuit switched domain service and grouping commutative field service are carried out time division multiplexing, preferentially circuit switched domain service is carried out time division multiplexing and in said connection, transmit;
When having only the circuit switched domain service transmission, a plurality of circuit switched domain services are carried out in said connection, transmitting after the time division multiplexing.
3. the method for claim 1 is characterized in that, saidly circuit switched domain service is carried out Radio Link control coding comprises:
Circuit switched domain service is carried on Radio Link controll block,, institute's loaded service frame is carried out error correction coding according to the remaining bits of Radio Link controll block.
4. the method for claim 1 is characterized in that, saidly circuit switched domain service is carried out Radio Link control coding comprises:
Traffic frame in the said circuit switched domain service is carried out the buffer memory packing;
The traffic frame that will pass through above-mentioned buffer memory packing carries out Radio Link control coding so that send.
5. the method for claim 1 is characterized in that, said method also comprises:
USF in the traffic frame of the circuit switched domain service that the user sends is set, and said USF is used to indicate can be next up user who uploads traffic frame;
Know ownly for can be the time according to the USF in the said traffic frame that receives as the user of circuit switched domain service, send traffic frame or mourn in silence and indicate the SID frame at next up next up user who uploads traffic frame.
6. method as claimed in claim 5 is characterized in that, said method also comprises:
When receiving the SID frame that the user sends, this user's of periodic scheduling uplink SID frame or traffic frame, and the ascending resource of free time distributed to multiplexing circuit switching or packet switching user;
When receiving the traffic frame that the user sends, dispatch the traffic frame of this user's uplink constantly.
7. method as claimed in claim 6 is characterized in that, said method comprises that also the user distinguishes the business of the multiplexing back transmission of reception, obtains circuit switching or packet switching service content, comprising:
When packet switching user's side is distinguished, do not pass through if said user carries out verification occurring when head is deciphered to the data that receive, then said receive be the business of circuit-switched user, said packet switching user shields the business of said circuit-switched user;
When the circuit-switched user side is distinguished; According to frame bit area parallel circuit switching domain business and the grouping commutative field service steathily in the burst that obtains said business; Distinguish different circuits switching domain business according to different frame bits steathily or training sequence; Or the TFI that inserts in the traffic frame according to said circuit switched domain service distinguishes the different circuits reciprocal exchange of business.
8. a network equipment is characterized in that, said equipment comprises:
Set up the unit, be used to circuit switched domain service and set up connection, so that circuit switched domain service is carried on the packet-switched domain network based on block dispatching;
Scheduling unit; Said circuit switched domain service after being used for encoding is eating dishes without rice or wine to carry out time division multiplexing dispatching with the block dispatching mode; Said circuit switched domain service behind the coding is carried out in said connection, transmitting after the time division multiplexing, the circuit switched domain service after maybe will encoding with on said the connection, transmit after grouping commutative field service carries out time division multiplexing;
Wherein, said scheduling unit comprises:
The first coding submodule is used for said circuit switched domain service is carried out Radio Link control coding;
Or/and,
The second coding submodule; Be used for said circuit switched domain service is carried out chnnel coding; Said signal encoding comprises that the traffic frame to circuit switched domain service carries out the circuit commutative field coding, and in said traffic frame, inserts uplink state sign USF or insert temporary flow identity TFI simultaneously.
9. equipment as claimed in claim 8 is characterized in that, said scheduling unit also comprises:
Scheduler module; Be used for dispatching eating dishes without rice or wine with the block dispatching mode to grouping commutative field service with through the circuit switched domain service of coding according to scheduling strategy; And according to said scheduling circuit switched domain service is carried out multiplexing back transmission or circuit commutative field and grouping commutative field service are carried out multiplexing back transmitting, wherein, said scheduling strategy comprises; When circuit switching and grouping commutative field service were multiplexing, the priority scheduling circuit switched domain service carried out multiplexing and transmission.
10. equipment as claimed in claim 9 is characterized in that, said scheduler module comprises:
Submodule is set; Be used for being provided with the USF of the traffic frame of the circuit switched domain service that sends to the user; Said USF is used to indicate can be next up user who uploads traffic frame; When the user of circuit switched domain service know according to the USF in the said traffic frame that receives own for can be the time next up user who uploads traffic frame, at next up transmission traffic frame or SID frame;
The uplink scheduling submodule; Be used for carrying out uplink scheduling according to the traffic frame of the user's transmission that receives or the indication SID frame of mourning in silence; After receiving the SID frame, this user's of periodic scheduling uplink SID frame or traffic frame, and the ascending resource of free time distributed to multiplexing circuit switching or packet switching user; When receiving traffic frame, dispatch the traffic frame of this user's uplink constantly.
11. a terminal equipment is characterized in that, said equipment comprises:
Codec unit is used for the circuit switched domain service frame in the packet-switched domain transmission is carried out encoding and decoding;
Discrimination unit is used for the business of descending reception is carried out circuit commutative field and/or grouping commutative field service differentiation, and obtains the corresponding business content through the decoding of codec unit;
Transmitting element is used for the uplink state sign USF that correct decoding obtains, and sends the uplink service through coding according to said USF;
Wherein, said codec unit comprises:
First coding/decoding module; Be used for said circuit-switched service frame is carried out channel coding/decoding; Said signal encoding comprises that the traffic frame to circuit switched domain service carries out the circuit commutative field coding, and in said traffic frame, inserts USF or insert temporary flow identity TFI simultaneously;
Or second coding/decoding module is used for the traffic frame of said circuit switched domain service is carried out Radio Link control encoding and decoding.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101985876A CN101674604B (en) | 2008-09-12 | 2008-09-12 | Method for transmitting circuit switched domain service, network equipment and terminal equipment |
| PCT/CN2009/073912 WO2010028608A1 (en) | 2008-09-12 | 2009-09-14 | Transmission method, network device and terminal device for circuit switch field services |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101985876A CN101674604B (en) | 2008-09-12 | 2008-09-12 | Method for transmitting circuit switched domain service, network equipment and terminal equipment |
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| CN101674604A CN101674604A (en) | 2010-03-17 |
| CN101674604B true CN101674604B (en) | 2012-07-04 |
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| WO (1) | WO2010028608A1 (en) |
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| CN101860800B (en) * | 2010-05-20 | 2012-09-05 | 北京邮电大学 | Method for providing MBMS service by fusion of cellular network and broadcast network, system and device |
| CN102025851B (en) * | 2010-12-20 | 2014-03-12 | 中兴通讯股份有限公司 | Method and system for bearing voice services on data field |
| CN103283275B (en) * | 2011-01-05 | 2017-03-08 | 瑞典爱立信有限公司 | The load balance of data |
| US9007937B2 (en) * | 2012-06-02 | 2015-04-14 | International Business Machines Corporation | Techniques for segregating circuit-switched traffic from packet-switched traffic in radio access networks |
| CN103906240B (en) * | 2012-12-26 | 2017-11-14 | 中国移动通信集团辽宁有限公司 | A kind of time-derived channel distribution method and system |
| US9680609B2 (en) | 2015-01-27 | 2017-06-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Transmitting device, receiving device, controlling node, and methods therein, for transmitting a block to the receiving device |
| CN107342949B (en) * | 2017-06-12 | 2019-08-20 | 烽火通信科技股份有限公司 | It is a kind of realize TDM and Packet Service statistical multiplex transmission device, method |
| CN110798415B (en) * | 2018-08-03 | 2022-02-18 | 中兴通讯股份有限公司 | Service transmission method, equipment and computer storage medium |
| CN113839739B (en) * | 2020-06-24 | 2023-07-28 | 华为技术有限公司 | Data processing method and device in communication system |
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| CN101674604A (en) | 2010-03-17 |
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