CN101932038B - Transmission method of radio access bearer and system thereof - Google Patents
Transmission method of radio access bearer and system thereof Download PDFInfo
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- CN101932038B CN101932038B CN 200910087388 CN200910087388A CN101932038B CN 101932038 B CN101932038 B CN 101932038B CN 200910087388 CN200910087388 CN 200910087388 CN 200910087388 A CN200910087388 A CN 200910087388A CN 101932038 B CN101932038 B CN 101932038B
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Abstract
The invention discloses a transmission method of a radio access bearer, which comprises the following steps of: a sending party of a use end (UE) service bearer merges the UE service bearer with the completely same or partially same service quality (QoS) parameters, multiplexes the emerged UE service bearer onto the same bottom layer data bearer, and sends to a receiving party of the UE service bearer according to the uniform QoS; and the receiving party of the UE service bearer obtains the UE service bearer which corresponds to the bottom layer data bearer identification from the bottom layer data bearer according to the corresponding relationship of the preset bottom layer data bearer identification and the UE service bearer identification. The invention further discloses a transmission system of the radio access bearer, which offers the transmission which meets the QoS for the service bearers of the different UEs under the condition that the quantity of the bottom layer data bearer is limited and the bottom layer data bearer simultaneously bears the service with the other types.
Description
Technical field
The present invention relates to the service bearer technology in the radio communication, relate in particular to a kind of transmission method and system of RAB.
Background technology
Cellular radio Communication system as shown in Figure 1, mainly by terminal (UE, User Equipment), Access Network and core net form, the network that base station (eNB) or base station and base station controller form is called wireless access network (RAN, Radio Access Network), be responsible for Access Layer affairs, for example management of Radio Resource; Core net is responsible for the Non-Access Stratum affairs, such as position renewal etc.; UE refers to the various device that can communicate by letter with cellular radio communication network, such as mobile phone, notebook computer etc.Can have physics or connection in logic according to actual conditions between the eNB, and each eNB can connect with one or more than one core net node (CN, Core Network).
In cellular radio Communication system, fixedly the wireless coverage of eNB network causes in the covering of wireless network inevasible existence covering leak such as various building structure for reasons such as stopping of wireless signal because a variety of causes is restricted.In addition, the edge zone in the residential quarter, owing to weakening of wireless signal strength, and the interference of neighbor cell, cause UE communication quality when cell edge relatively poor, the error rate of wireless transmission is higher.For the coverage rate, group mobility, casual network deployment, the throughput in cell edge area and the covering of new region that improve data, prior art has been introduced the concept of relaying (Relay).
Relay refers to have the website that passes through Radio Link relay data function between network node, also claim via node (Relay Node) or relay station (Relay Station), the structure of junction network as shown in Figure 2, wherein, the eNB directly UE of service is called grand (Macro) UE, and the UE of Relay service is called Relay UE; Radio Link between eNB and the UE is called the link that direct transfers (direct link), comprises up/down row (DL/UL, the downlink/uplink) link that direct transfers; Radio Link between Relay and the UE is called access link (access link), comprises the DL/UL access link; Radio Link between eNB and the Relay is called back haul link (backhaul link), comprises the DL/UL back haul link.
Relay can pass through the several different methods relay data, for example directly amplifies the wireless signal that receives; Perhaps the data that receive are processed, the data retransmission that will correctly receive again is to UE; Perhaps Relay and eNB cooperation send data to UE.Otherwise, the data that Relay also can relaying be sent to eNB by UE.
In numerous trunk types, exist a kind of relaying to be called as type one relaying (Type I Relay), its characteristics are as follows:
UE can't distinguish relaying and the fixing residential quarter under the eNB, and namely at UE, Relay itself is exactly a residential quarter, and as broad as long with the residential quarter under the fixing eNB, this type of residential quarter can be called the relaying residential quarter.There is the physical cell identity (PCI, Physical Cell Identity) of self the relaying residential quarter, equally with common residential quarter sends broadcasting, and when UE resided in the relaying residential quarter, used to UE relaying residential quarter separately distributing radio resource.Interface and protocol stack between relaying residential quarter and the Relay UE, identical with between common eNB residential quarter and the UE.
The LTE system adopts internet protocol-based (IP, Internet Protocol) flat architecture, as shown in Figure 3, Universal Terrestrial Radio Access Network (E-UTRAN by evolution, Evolved Universal Terrestrial Radio Access Network), CN and other support nodes form, wherein CN comprises: mobile management unit (MME, Mobility Management Entity) and gateway (S-GW, Serving Gateway), MME is responsible for mobile management, the processing of Non-Access Stratum signaling, user's mobile management, the operation of the chains of command such as contextual management; S-GW is responsible for transmission, forwarding and the route handoff etc. of UE user face data.Logically link to each other by X2 interface between the eNB, be used for supporting the mobility of UE in whole network, guarantee user's seamless switching; Each eNB is connected to System Architecture Evolution (ASE by the S1 interface, System Architecture Evolution) core net, namely the S1-MME interface by control plane links to each other with MME, S1-U interface by user plane links to each other with S-GW, and the S1 interface supports eNB to be connected with multiple spot between MME and the S-GW.The protocol stack of S1-MME interface as shown in Figure 4, its network layer is used the IP agreement, transport layer on the network layer is used SCTP (SCTP, Stream Control Transmission Protocol), application layer is used applying portion (S1-AP, the Application Part) agreement of chain of command.The protocol stack of S1-U interface as shown in Figure 5, its conventional data transmission platform (GTP-U, General Data Transfer Platform)/User Datagram Protoco (UDP) (UDP, User Datagram Protocol)/IP formed transmission bearer, in order to transmit the user plane protocol data cell (PDU, Protocol Data Unit) between eNB and the S-GW.
Each eNB carries out signaling and data transfer by Uu interface (wave point between UTRAN and the UE) with UE.Fig. 6 and Fig. 7 have shown respectively the L1 of eNB and UE, L2, the air protocol stack between the L3 from chain of command and user's face.
The LTE system can provide end to end service, and guarantees the professional service quality (QoS, Quality of Service) that provides by the parameter of concrete carrying.Packet-based core networks (EPC in evolution, Evolved Packet Core) and the granularity that guarantees of the QoS level of E-UTRAN carrying be the grouping system (EPS of evolution, Evolved Packet System) RAB (E-RAB, E-UTRAN Radio Access Bearer) of carrying (EPS bearer)/E-UTRAN.It is the packet that carries to transmit the EPS carrying by S5/S8 between S-GW and public data network (PDN, Public Data NetWorks) gateway (P-GW, PDN GateWay).Being the packet that transmits E-RAB by S1 Bearer between eNB and S-GW, is the packet that transmits E-RAB by radio bearer (Radio Bearer) between UE and eNB.
The base station of being responsible for connection Relay is called as the evolution base station of gifting (DeNB, Donr eNB).Wave point between Relay and the DeNB is defined as the Un interface, and the radio bearer of Un interface is called as Un RB; Interface between UE and the Relay still is defined as the Uu interface, and the radio bearer of Uu interface is called as Uu RB.
In the prior art to the QoS definition of the E-RAB (being UE-E-RAB) of UE with reference to following table 1, be called standards service quality scale sign (QCI, QoS Class Identified).Stipulated that at present 9 class QoS are from QCI 1 to QCI 9, every class QCI has stipulated corresponding resource type (Resource Type), message delay requires (Packet Delay Budget), the parameters such as packet loss (Packet Error loss Rate).For example: QCI is that the resource type of 1 its representative of expression is guaranteed rate (GBR, Guaranteed Bit Rate), and message delay requires to be no more than 100 milliseconds (ms), and packet loss is no more than 10-2.
Table 1
Different Un RB need to transmit control signal, the UE-E-RAB information of UE on the Relay, the data such as configuration information of Relay itself in the Un interface.Wherein, the transmission of UE-E-RAB need to have QoS as assurance, because existing Un interface only can provide a limited number of Un RB carryings, therefore need to solve the problem of how in the Un of limited amount RB, transmitting at UE-E-RAB under the prerequisite of guaranteed qos, yet prior art also can't provide a kind of effective solution, thereby makes troubles to practical application.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of transmission method and system of RAB, to realize in the transmission of UE-E-RAB under the prerequisite of guaranteed qos in the Un of limited amount RB.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of transmission method of RAB, the method comprises:
The UE service bearer that the transmit leg of terminal UE service bearer is identical to service quality QoS parameter or part is identical merges, and the UE service bearer after will merging is multiplexed into the upper reciever that is transferred to the UE service bearer according to unified QoS of same bottom data carrying; Described UE service bearer merging is specially: the identical UE service bearer of levels of quality of service sign QCI is merged, perhaps require the UE service bearer identical with packet loss to merge to message delay in the qos parameter;
The reciever of described UE service bearer obtains the UE service bearer corresponding with described bottom data bearing identification according to the corresponding relation of pre-configured bottom data bearing identification and UE service bearer sign from described bottom data carrying; Described bottom data is carried as the radio bearer Un RB of Un interface, or the RAB Relay-E-RAB of relaying.
Described corresponding relation is pre-configured by the transmit leg of described UE service bearer, and sends to the reciever of described UE service bearer before transmission UE service bearer.
The method further comprises: the reciever of described UE service bearer selects to return the employed bottom data carrying of described UE service bearer according to described bottom data bearing identification.
The method further comprises: when the UE service bearer that transmits after merging, only transmit conventional data transmission platform GTP protocol data.
The head of described GTP protocol data only carries mandatory field.
The present invention also provides a kind of sending method of RAB, and the method comprises:
The UE service bearer that the transmit leg of terminal UE service bearer is identical to service quality QoS parameter or part is identical merges, and the UE service bearer after will merging is multiplexed into the upper reciever that is transferred to the UE service bearer according to unified QoS of same bottom data carrying; Described bottom data is carried as the radio bearer Un RB of Un interface, or the RAB Relay-E-RAB of relaying;
Described UE service bearer merging is specially:
The identical UE service bearer of levels of quality of service sign QCI is merged, perhaps require the UE service bearer identical with packet loss to merge to message delay in the qos parameter.
When the UE service bearer that transmits after merging, only transmit conventional data transmission platform GTP protocol data.
The head of described GTP protocol data only carries mandatory field.
The present invention also provides a kind of transmission system of RAB, and this system comprises: the sending module of UE service bearer and accept module, wherein,
The sending module of described UE service bearer, be used for UE service bearer identical to qos parameter or that part is identical and merge, and the UE service bearer after will merging is multiplexed into the upper module of accepting that is transferred to the UE service bearer according to unified QoS of same bottom data carrying; Described UE service bearer merging is specially: the identical UE service bearer of levels of quality of service sign QCI is merged, perhaps require the UE service bearer identical with packet loss to merge to message delay in the qos parameter;
Described UE service bearer accept module, be used for according to the corresponding relation of pre-configured bottom data bearing identification with UE service bearer sign, carry from described bottom data and obtain the UE service bearer corresponding with described bottom data bearing identification;
Described bottom data is carried as the radio bearer Un RB of Un interface, or the RAB Relay-E-RAB of relaying.
The sending module of described UE service bearer is further used for, and before transmission UE service bearer, pre-configured described corresponding relation is sent to the module of accepting of described UE service bearer.
The module of accepting of described UE service bearer is further used for, and selects to return the employed bottom data carrying of described UE service bearer according to described bottom data bearing identification.
The transmission method of a kind of RAB provided by the present invention and system, the UE service bearer that transmit leg is identical to qos parameter or part is identical by the UE service bearer merges, and the UE service bearer after will merging is multiplexed into the upper reciever that is transferred to the UE service bearer according to unified QoS of same bottom data carrying; The reciever of UE service bearer obtains the UE service bearer corresponding with the bottom data bearing identification according to the corresponding relation of pre-configured bottom data bearing identification and UE service bearer sign from the bottom data carrying.By the present invention, realized in bottom data carrying limited amount, and the bottom data carrying bears under the other types service conditions simultaneously, provide the transmission of satisfying QoS of survice to the service bearer of different UEs.
Description of drawings
Fig. 1 is the structural representation of cellular radio Communication system in the prior art;
Fig. 2 is the structural representation of junction network in the prior art;
Fig. 3 is the network architecture schematic diagram of LTE system in the prior art;
Fig. 4 is the protocol stack schematic diagram of S1-MME interface in the prior art;
Fig. 5 is the protocol stack schematic diagram of S1-U interface in the prior art;
Fig. 6 is the air protocol stack schematic diagram of the chain of command between eNB and the UE in the prior art;
Fig. 7 is the air protocol stack schematic diagram of the user's face between eNB and the UE in the prior art;
Fig. 8 is the flow chart of the transmission method of a kind of RAB of the present invention;
Fig. 9 is the UE-E-RAB transmission schematic diagram of the embodiment of the invention one;
Figure 10 is the UE-E-RAB transmission schematic diagram of the embodiment of the invention two;
Figure 11 is the message format schematic diagram that UE-E-RAB transmits in Un RB among the present invention;
Figure 12 is the message format schematic diagram that UE-E-RAB transmits in Relay-E-RAB among the present invention;
Figure 13 is the composition structural representation of the transmission system of a kind of RAB of the present invention.
Embodiment
The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.
The transmission method of a kind of RAB provided by the present invention as shown in Figure 8, mainly may further comprise the steps:
Preferably, the transmit leg of UE service bearer can merge the identical UE service bearer of QCI, perhaps also can require the UE service bearer identical with packet loss to merge to message delay in the qos parameter.
The characteristic value of standard QCI is 9 classes, and respectively corresponding 9 kinds of different QoS are with reference to table 1.QCI is merged according to the situation that resource type, message delay require, packet loss is close, and the combination of various merging is all within protection scope of the present invention.The quantitative requirement of the QCI type after the merging is less than or equal to the carrying quantity of the air interface between Relay and the DeNB.
Preferably, be that the QCI of Non-GBR type is that 6,8,9 three types merge to resource type, and be 6 Resources allocation according to QCI, and keep remaining QCI type, QCI merges into 7 types by 9 types like this.
Preferably, be that the QCI of Non-GBR type is 5,7 two types and merges to resource type, and be 5 Resources allocation according to QCI; Be that the QCI of Non-GBR type is that 6,8,9 three types merge to resource type, and be 6 Resources allocation according to QCI; Keep simultaneously remaining QCI type, QCI merges into 5 types by 9 types like this.
It is pointed out that the QCI after this merging is only effective when Un interface assignment interface-free resources, the QCI after the merging need to not transmit between Relay and DeNB with explicit way or implicit.
Air interface between Relay and the DeNB need to be set up bottom data carrying (radio bearer), the content that radio bearer will carry is the upper different UE service bearer (UE-E-RAB) of Relay, and these different UE-E-RAB need to transmit in identical Un mouth radio bearer.
The foundation of radio bearer is to set up or reshuffle suitable Radio Resource according to the QCI after this merging, merges the indicated QoS of QCI to guarantee finally can satisfy.
After radio bearer was set up and to be finished, DeNB set up or reshuffles and carry the therewith different UE-E-RAB of QCI coupling, the foundation of Un interface bearing like this with the Relay that passes to of bottom data bearing identification explicit or implicit expression with the corresponding relation of UE-E-RAB sign.
The reciever of UE service bearer can also select to return the employed bottom data carrying of UE service bearer according to this bottom data bearing identification.
The bottom data carrying that it is pointed out that indication of the present invention can be the radio bearer (UnRB) of Un interface, also can be the RAB (Relay-E-RAB) of relaying.
The below further specifies the transmission method of above-mentioned RAB as an example of Un RB example.
In this embodiment one, certain DeNB need to be delivered to UE by the Un interface between Relay and the DeNB with two different EPS carryings of UE, as shown in Figure 9, the RAB of two UE1 of the existence of the S1-U interface in DeNB is respectively UE1E-RAB1 and UE1E-RAB2; It is respectively UE2E-RAB1 and UE2E-RAB2 that there are two RABs to UE2 in S1-U interface in DeNB.
On eating dishes without rice or wine between Relay and the DeNB, exist two Relay to the air interface carrying of UE1, be respectively UE1 Relay Uu bear1 and UE1 Relay Uu bear2; On eating dishes without rice or wine between Relay and the DeNB, exist two Relay to the air interface carrying of UE2, be respectively UE2 Relay Uu bear1 and UE2 Relay Uu bear2.
E-RAB and Uu bear shine upon one by one, and mapping relations herein are:
UE1 E-RAB1 is mapped to UE1 Relay Uu bear1,
UE1 E-RAB2 is mapped to UE1 Relay Uu bear2,
UE2 E-RAB1 is mapped to UE2 Relay Uu bear1,
UE2 E-RAB2 is mapped to UE2 Relay Uu bear2.
The radio bearer (Un RB) of the Un interface that wherein UE1 E-RAB1, UE1 E-RAB2, UE2 E-RAB1, UE2 E-RAB1 need to be by Relay and DeNB is delivered to Relay, and is mapped as respectively UE1 Relay Uu bear1, UE1 Relay Uu bear2, UE2 Relay Uu bear1, UE2 Relay Uu bear2 by Relay by these mapping relations.
If the QoS number of types of E-RAB is less than or equal to the quantity of Un RB, E-RAB that then can QoS is consistent transmits in same Un RB, for example as shown in Figure 9, transmission UE-E-RAB as shown in table 2 below in the situation that two Un RB (Un RB N, Un RB N+1) only arranged:
Table 2
| UE-E-RAB | Qos parameter |
| UE1 E-RAB1 | QCI＝5 |
| UE1 E-RAB2 | QCI＝6 |
| UE2 E-RAB1 | QCI＝5 |
| UE2 E-RAB2 | QCI＝6 |
Four of two UE E-RAB have two kinds of qos requirements in this table, and DeNB is UE1 E-RAB1 and UE2 E-RAB1 distribution according to QCI=5 or reshuffles a Un RB, is illustrated in figure 9 as Un RB N; DeNB is UE1 E-RAB1 and UE2 E-RAB1 distribution according to QCI=6 or reshuffles a Un RB, is illustrated in figure 9 as Un RB N+1.
If the QoS number of types of E-RAB is greater than the quantity of Un RB, then can merge by the E-RAB that QoS is identical or close, utilize the QoS that merges to select Un RB transmission, for example in the situation that two Un RB (UnRB N, UnRB N+1) only arranged, transmit as shown in Figure 9 UE-E-RAB as shown in table 3 below:
Table 3
| UE-E-RAB | Qos parameter |
| UE1 E-RAB1 | QCI＝5 |
| UE1 E-RAB2 | QCI＝6 |
| UE2 E-RAB1 | QCI＝8 |
| UE2 E-RAB2 | QCI＝9 |
Two UE have four qos requirements in this table, suppose that at present available Un RB quantity only has 2, then QCI can be equaled 5 UE1 E-RAB1 and distribute separately or reprovision Un RB transmission, and the qos requirement of Un RB is 5 to distribute according to QCI; And the QCI common same Un RB of use that is other three E-RAB of 6,7,8, the QoS of Un RB is that 6 requirement distributes according to QCI.
If there is GBR type QoS, QCI is consistent, but the inconsistent situation of GBR speed jointly transmit according to identical QCI, and Un RB according to rate requirement high require Resources allocation.For example in the situation that two Un RB (UnRB N, UnRB N+1) only arranged, transmit as shown in Figure 9 UE-E-RAB as shown in table 4 below:
Table 4
| UE-E-RAB | Qos parameter | GBR speed |
| UE1 E-RAB1 | QCI＝1 | 10 |
| UE1 E-RAB2 | QCI＝1 | 20 |
| UE2 E-RAB1 | QCI＝1 | 30 |
| UE2 E-RAB2 | QCI＝2 | 30 |
In this case, UE1 E-RAB1, UE1 E-RAB2, UE2 E-RAB1 use identical Un RB, and are 30 to transmit according to GBR speed.
It is pointed out that the above embodiments one are applicable to the transmission of the RAB between Relay and the Relay equally.
The below further specifies the transmission method of above-mentioned RAB as an example of Relay-E-RAB example again.
In this embodiment two, its framework is to access EPC by Relay as special UE, and the chain of command of the UE on the Relay and user's face are by the Relay-E-RAB transmission of Relay.Relay distinguishes the QoS of UE-E-RAB in Relay ' s SGW/PGW context, according to embodiment one similar method be that UE-E-RAB selects the Relay-E-RAB satisfy its QoS transmission to transmit.
As shown in figure 10, there is the E-RAB of UE at the eNB of Relay attribute section and User-UE ' s SGW/PGW, referred to as UE-E-RAB.The E-RAB that has Relay between the UE attribute section of Relay and Relay-UE ' the s SGW/PGW is referred to as Realy-E-RAB.Article one, Realy-E-RAB carries different UE-E-RAB.
If the QoS number of types of UE-E-RAB is less than or equal to the quantity of Realy-E-RAB, can in same Realy-E-RAB, transmit by the UE-E-RAB that QoS is consistent, for example in the situation that two Realy-E-RAB (Realy-E-RAB1 and Realy-E-RAB2) transmission UE-E-RAB as shown in table 5 below is only arranged:
Table 5
| UE-E-RAB | Qos parameter |
| UE1 E-RAB1 | QCI＝5 |
| UE1 E-RAB2 | QCI＝6 |
| UE2 E-RAB1 | QCI＝5 |
| UE2 E-RAB2 | QCI＝6 |
Four of two UE E-RAB have two kinds of qos requirements in this table, and the logic entity of Relay UE ' SGW/PGW will equal 5 UE1 E-RAB1 and UE2 E-RAB1 according to QCI and transmit by Realy-E-RAB1; The logic entity of Relay UE ' SGW/PGW will equal 6 UE1 E-RAB2 and UE2 E-RAB2 according to QCI and transmit by Realy-E-RAB2, to guarantee the realization of different QoS.
If the QoS number of types of UE-E-RAB is greater than the quantity of Realy-E-RAB carrying, select the Realy-E-RAB transmission after UE-E-RAB can being merged according to QoS, for example in the situation that two Realy-E-RAB (Realy-E-RAB1 and Realy-E-RAB2) transmission UE-E-RAB as shown in table 6 below is only arranged:
Table 6
| UE-E-RAB | Qos parameter |
| UE1 E-RAB1 | QCI＝5 |
| UE1 E-RAB2 | QCI＝6 |
| UE2 E-RAB1 | QCI＝8 |
| UE2 E-RAB2 | QCI＝9 |
Two UE have the UE-E-RAB of four different QoS in this table, then QCI can be equaled 5 UE1 E-RAB1 and transmit at Realy-E-RAB1; And QCI is 6,7,8 the same Realy-E-RAB2 transmission of the common use of other three UE-E-RAB.
If GBR type QoS appears in UE-E-RAB, QCI is consistent, but the inconsistent situation of speed, and UE-E-RAB uses identical Realy-E-RAB transmission according to identical QCI, and transmission rate request satisfies the highest GBR rate requirement of share Realy-E-RAB.For example, in the situation that two Realy-E-RAB (Realy-E-RAB1 and Realy-E-RAB2) transmission UE-E-RAB as shown in table 7 below is only arranged:
Table 7
| UE-E-RAB | Qos parameter | GBR speed |
| UE1 E-RAB1 | QCI＝1 | 10 |
| UE1 E-RAB2 | QCI＝1 | 20 |
| UE2 E-RAB1 | QCI＝1 | 30 |
| UE2 E-RAB2 | QCI＝2 | 30 |
In this case, UE1 E-RAB1, UE1 E-RAB2, UE2 E-RAB1 use identical Realy-E-RAB 1 to transmit, and are 30 according to the GBR rate requirement; UE2 E-RAB2 uses Realy-E-RAB 2 to transmit.
It needs to be noted, before the different UE-E-RAB of same carrying transmission, distribute the network element that carries to need implicit expression or the explicit corresponding relation with bearing identification and UE-E-RAB sign to inform and be accepted network element.
Corresponding embodiments of the invention one, the Un interface of DeNB is that UE RAB distributes after the Un RB, DeNB carries the Un RB numbering of for this reason E-RAB distribution by E-RAB message, Realy is carried and be sent to E-RAB message by UE, Realy can obtain the E-RAB information which Un RB is used for transmission UE by obtaining this information, and network element is accepted in the network element of distribute data radio bearer (DRB) just can be explicit like this DRB numbering is informed with the corresponding relation of UE E-RAB.
Better, when the Un of DeNB interface is UE RAB distribution Un RB, the Un RB sequence number of configuration is carried out according to the acquiescence sequence number of acquiescence agreement, for example can be that Un RB distributes corresponding sequence number according to the value of QCI, and QCI is that the UE RAB of 1 type all is 1 Un RB transmission from sequence number.
Corresponding embodiments of the invention two, when Relay-UE ' s SGW/PGW is UE-E-RAB distribution Relay-E-RAB, Relay-UE ' s SGW/PGW carries the Relay-E-RAB sign of for this reason UE-E-RAB distribution by the control message of Relay-E-RAB, E-RAB control message by UE carries and is sent to Relay, which Relay-E-RAB Relay can obtain for the E-RAB information of this UE of transmission by obtaining this information, and the corresponding relation that will carry numbering and UEE-RAB that the network element of distribution carrying just can be explicit is like this informed and accepted network element.
Better, when Relay-UE ' s SGW/PGW is UE-E-RAB distribution Relay-E-RAB, the employed Relay-E-RAB sequence number of UE-E-RAB is carried out according to the default identification of acquiescence agreement, for example can be that Relay-E-RAB distributes corresponding sequence number according to the value of QCI, QCI be that the UE-E-RAB of 1 type all is 1 Relay-E-RAB transmission from sequence number.
In addition, in order to save interface-free resources, eat dishes without rice or wine Data Radio Bearer (DRB) when transmitting the E-RAB of UE at Un mouth or Relay and Relay, can only transmit the GTP protocol data, carrying UPD and the IP agreement of GTP are not transmitted.For example with reference to Figure 11, the message format the during UE-E-RAB of Relay and DeNB transmission, Un RB only transmits the GTP message, does not transmit UDP and IP protocol massages.
Message format when same reference Figure 12, the UE-E-RAB of Relay and Relay-UE ' s SGW/PGW transmission only transmits the GTP message of UE-E-RAB among the Relay-E-RAB, do not transmit UDP and the IP protocol massages of UE-E-RAB.
In order further to save interface-free resources, when carrying UE-E-RAB, the GTP head of UE-E-RAB can only carry mandatory field, if UE-E-RAB requires the order-preserving function, to between DeNB side and EPS network element, realize because between eNB and the Relay, between Relay and the Relay, the carrying of Relay and Relay-UE ' s SGW/PGW guarantees finishing of order-preserving function.
Corresponding embodiments of the invention one, Un mouth or Relay and Relay are eated dishes without rice or wine Data Radio Bearer (DRB) when transmitting the E-RAB of UE, and the E-RAB of the UE between DeNB and the EPS carries to be transferred in the Relay network element by the Un interface and transmits; These E-RAB connect use GTPU agreement to be transmitted, if need in the situation of order-preserving function in the process of transmission, namely the order-preserving function realizes in the situation that needs transmit GTPU sequence number (Sequence Number), carries out the termination of order-preserving function in the DeNB side.DeNB guarantees to send data by the order of E-RAB to Relay at DeNB, and the data that simultaneously this Un carrying can guarantee to carry are with sequence delivery.The GTPU sequence number of UE is not transmitted at the Un interface.
Corresponding embodiments of the invention two, when transmitting the E-RAB of UE between Relay and Relay-UE ' the s SGW/PGW, the E-RAB carrying of the UE between Relay-UE ' s SGW/PGW and the UE-EPS is transferred in the Relay network element by Relay-E-RAB to be transmitted; These UE-E-RAB connect use GTPU agreement to be transmitted, if need in the situation of order-preserving function in the process of transmission, namely the order-preserving function realizes in the situation that needs transmit the GTPU sequence number, carries out the termination of order-preserving function in Relay-UE ' s SGW/PGW side.Relay-UE ' s SGW/PGW guarantees to send data by the order of E-RAB to Relay at DeNB, and the data that simultaneously this Relay-E-RAB carrying can guarantee to carry are with sequence delivery.The GTPU sequence number of UE is not transmitted at the Un interface.
For realizing the transmission method of above-mentioned RAB, the transmission system of a kind of RAB provided by the present invention as shown in figure 13, comprising: the sending module of UE service bearer 10 and accept module 20.The sending module 10 of UE service bearer, be used for UE service bearer identical to qos parameter or that part is identical and merge, and the UE service bearer after will merging is multiplexed into same bottom data carrying and goes up according to what unified QoS was transferred to the UE service bearer and accept module 20.The UE service bearer accept module 20, be used for according to the corresponding relation of pre-configured bottom data bearing identification with UE service bearer sign, carry from bottom data and obtain the UE service bearer corresponding with the bottom data bearing identification.
Better, the sending module 10 of UE service bearer is further used for, and before transmission UE service bearer, accepts module 20 with what pre-configured corresponding relation sent to the UE service bearer; Preferably, can merge the identical UE service bearer of QCI, perhaps require the UE service bearer close with packet loss to merge to message delay in the qos parameter.
Better, the module 20 of accepting of UE service bearer is further used for, and selects to return the employed bottom data carrying of UE service bearer according to the bottom data bearing identification.
The sending module 10 of above-mentioned UE service bearer namely as in the transmit leg of UE service bearer in order to realizing the functional module of RAB transmission, the UE service bearer accept module 20 namely as in the reciever of UE service bearer in order to realize the functional module of RAB transmission.Yet it is pointed out that because the data between UE and the DeNB can transmitted in both directions (DL/UL) in the practical application, therefore during corresponding DL repeated link, Relay is namely as the transmit leg of UE service bearer, and DeNB is namely as the reciever of UE service bearer; Otherwise during corresponding UL repeated link, DeNB is namely as the transmit leg of UE service bearer, and Relay is namely as the reciever of UE service bearer.In addition, the transmission method of RAB of the present invention and system also are applicable to the transmission of the RAB between Relay and the Relay.Therefore, for a certain DeNB or the Relay in the practical application, it can comprise above-mentioned two functional modules simultaneously, respectively in order to the transmission that realizes RAB with accept function.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (11)
1. the transmission method of a RAB is characterized in that, the method comprises:
The UE service bearer that the transmit leg of terminal UE service bearer is identical to service quality QoS parameter or part is identical merges, and the UE service bearer after will merging is multiplexed into the upper reciever that is transferred to the UE service bearer according to unified QoS of same bottom data carrying; Described UE service bearer merging is specially: the identical UE service bearer of levels of quality of service sign QCI is merged, perhaps require the UE service bearer identical with packet loss to merge to message delay in the qos parameter;
The reciever of described UE service bearer obtains the UE service bearer corresponding with described bottom data bearing identification according to the corresponding relation of pre-configured bottom data bearing identification and UE service bearer sign from described bottom data carrying; Described bottom data is carried as the radio bearer Un RB of Un interface, or the RAB Relay-E-RAB of relaying.
2. the transmission method of described RAB according to claim 1 is characterized in that, described corresponding relation is pre-configured by the transmit leg of described UE service bearer, and sends to the reciever of described UE service bearer before transmission UE service bearer.
3. the transmission method of described RAB according to claim 1, it is characterized in that, the method further comprises: the reciever of described UE service bearer selects to return the employed bottom data carrying of described UE service bearer according to described bottom data bearing identification.
4. the transmission method of described RAB according to claim 1 is characterized in that, the method further comprises: during UE service bearer after transmission merges, only transmit conventional data transmission platform GTP protocol data.
5. the transmission method of described RAB according to claim 4 is characterized in that, the head of described GTP protocol data only carries mandatory field.
6. the sending method of a RAB is characterized in that, the method comprises:
The UE service bearer that the transmit leg of terminal UE service bearer is identical to service quality QoS parameter or part is identical merges, and the UE service bearer after will merging is multiplexed into the upper reciever that is transferred to the UE service bearer according to unified QoS of same bottom data carrying; Described bottom data is carried as the radio bearer Un RB of Un interface, or the RAB Relay-E-RAB of relaying;
Described UE service bearer merging is specially:
The identical UE service bearer of levels of quality of service sign QCI is merged, perhaps require the UE service bearer identical with packet loss to merge to message delay in the qos parameter.
7. the sending method of described RAB according to claim 6 is characterized in that, during UE service bearer after transmission merges, only transmits conventional data transmission platform GTP protocol data.
8. the sending method of described RAB according to claim 7 is characterized in that, the head of described GTP protocol data only carries mandatory field.
9. the transmission system of a RAB is characterized in that, this system comprises: the sending module of UE service bearer and accept module, wherein,
The sending module of described UE service bearer, be used for UE service bearer identical to service quality QoS parameter or that part is identical and merge, and the UE service bearer after will merging is multiplexed into the upper module of accepting that is transferred to the UE service bearer according to unified QoS of same bottom data carrying; Described UE service bearer merging is specially: the identical UE service bearer of levels of quality of service sign QCI is merged, perhaps require the UE service bearer identical with packet loss to merge to message delay in the qos parameter;
Described UE service bearer accept module, be used for according to the corresponding relation of pre-configured bottom data bearing identification with UE service bearer sign, carry from described bottom data and obtain the UE service bearer corresponding with described bottom data bearing identification;
Described bottom data is carried as the radio bearer Un RB of Un interface, or the RAB Relay-E-RAB of relaying.
10. the transmission system of described RAB according to claim 9, it is characterized in that, the sending module of described UE service bearer is further used for, and before transmission UE service bearer, pre-configured described corresponding relation is sent to the module of accepting of described UE service bearer.
11. the transmission system of described RAB is characterized in that according to claim 9, the module of accepting of described UE service bearer is further used for, and selects to return the employed bottom data carrying of described UE service bearer according to described bottom data bearing identification.
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| CN102612096B (en) * | 2012-03-06 | 2014-10-29 | 电信科学技术研究院 | IP (internet protocol) data packet transmission method and IP packet transmission equipment |
| US9526091B2 (en) | 2012-03-16 | 2016-12-20 | Intel Corporation | Method and apparatus for coordination of self-optimization functions in a wireless network |
| WO2014205838A1 (en) * | 2013-06-29 | 2014-12-31 | 华为技术有限公司 | Data forwarding method, relay node equipment and network system |
| CN106797669A (en) * | 2014-10-08 | 2017-05-31 | Lg电子株式会社 | It is used for the method and apparatus of the E RAB for dual link treatment repetition in a wireless communication system |
| CN106034314A (en) * | 2015-03-10 | 2016-10-19 | 电信科学技术研究院 | Data transmission method and data transmission device |
| CN107820327A (en) * | 2017-10-27 | 2018-03-20 | 京信通信系统（中国）有限公司 | Data uplink, the method and system of downlink transfer and LTE network Transmission system |
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