CN101436984B - Data transmission method and apparatus - Google Patents
Data transmission method and apparatus Download PDFInfo
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- CN101436984B CN101436984B CN200710188177A CN200710188177A CN101436984B CN 101436984 B CN101436984 B CN 101436984B CN 200710188177 A CN200710188177 A CN 200710188177A CN 200710188177 A CN200710188177 A CN 200710188177A CN 101436984 B CN101436984 B CN 101436984B
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Abstract
The invention provides a method for transmitting data, which comprises the following steps: adding a serial number into a GTP-U data head of sent data; and receiving the data, and ordering the received data according to the serial number in the GTP-U data head of the data. The invention also provides a device for transmitting the data. In the embodiment, the method indicates P-GW to add the continuous serial numbers into the downlink GTP-U data according to a label or a label combination and the like in SAE QoS parameters, and indicates the P-GW and eNB to add the continuous serial numbers into the uplink data and the downlink data, so as to ensure order of transmission of the uplink data and the downlink data, and ensure order and no damage of data transmission at the wireless side.
Description
Technical field
The present invention relates to data communication field, particularly a kind of method and apparatus of transfer of data.
Background technology
UMTS (Universal Mobile Telecommunication System; Global system for mobile communications) be to adopt WCDMA (Wideband Code Division Multiple Access; The WCDMA access) 3-G (Generation Three mobile communication system) of air interface technologies also calls the WCDMA communication system to the UMTS system usually.The UMTS system comprises RAN (Radio Access Network, Radio Access Network) and CN (Core Network, core network).Wherein RAN is used to handle all and wireless function associated, and CN handles that all voice calls are connected with data in the UMTS system, and the exchange of realization and external network and routing function.
UMTS system logic framework is as shown in Figure 1.Wherein, GGSN (Gateway General PacketRadio Service Support Node, ggsn) as a basic Network Element Function entity, provides packet with route between the external data network and encapsulation.Which GGSN the user selects as gateway, is in PDP (Packet Data Protocol, packet data protocol) context activation process, to confirm according to user's the CAMEL-Subscription-Information and the Access Point Name of user's request.The function that GGSN provides comprises: with the critical point function of extenal grouped network, conversation management functional etc.SGSN (Serving GPRS Support Node; Serving GPRS Support Node) as a basic composition network element; Its significant feature is to be the MS of this SGSN coverage (Mobile Station; Travelling carriage) IP (Internet Protocol, Internet protocol) that transmits I/O divides into groups.The function that SGSN provides comprises: the route and the forwarding capability of the packet data package in this SGSN area; For all PS in this SGSN area (Packet Switch, packet switching) user provides service, encryption and authentication functions, conversation management functional, mobile management function; The interface function of same UTRAN (Universal Terrestrial Radio AccessNetwork, Universal Terrestrial Radio Access Network), GGSN, HLR interactive information such as (Home Location Register, attaching position registers).RAN is a wireless access network, is made up of RNC (Radio Network Controller, radio network controller) and NodeB (Node Base station, base station).
At present at 3GPP (Third Generation Partnership Project; Third generation partner program) in; Studying LTE (Long Term Evolved, long-term evolving network)/SAE (SystemArchitecture Evolved, System Architecture Evolution network).Wherein, fixed a kind of LTE/SAE network architecture is as shown in Figure 2, wherein; The function of MME (Mobility Management Entity, Mobility Management Entity) is to preserve the MM Context of UE (User Equipment, subscriber equipment); Like user's sign, mobility management states, positional information etc., and to NAS (Non Access Stratum; Non-Access Stratum) signaling is handled, and is responsible for the safety of NAS signaling etc.
SAE GW (SAE gateway) comprises S-GW (Serving Gateway; Gateway) and P-GW (PDN Gateway; Grouped data network gateway); S-GW and P-GW are two logic entities, may reside in (default situation if no special instructions, is that S-GW and P-GW are present on the different entities) on the same or different physical entities.The user plane context of the last preservation of S-GW UE like IP address and the routing iinformation of UE, is carried out Lawful Interception, grouped data routing function etc.
P-GW is responsible for the user plane anchor point function that UE is linked into Packet Data Network; Communicate through SGi reference point and external packet data net; Function with grouping route and forwarding, and responsible policy, billing enhancement function, based on packet filtering function of each user etc.
E-UTRAN (Evolved Universal Terrestrial Radio Access Network, evolution Universal Terrestrial Radio Access Network) is the evolvement network wireless access network, is made up of eNB (Evolved NodeB, evolution base station).
Among the SAE between eNB and the UE user face protocol stack as shown in Figure 3, PDCP is responsible for carrying out following function: the data head compression and decompression, the data delivery data of encrypting, repeating to submit to for lower floor for upper strata, user data and control data detect through the PDCP sequence number according to the order of sequence when switching.
In the prior art; Through the transmission order of parameter among the UMTS Qos is set; Indication GGSN and RNC add continuous sequence number for up-downgoing GTP-U (GPRS Tunneling Protocol User, the GPRS Tunnel Protocol user) data that transmit, and can guarantee the order of up-downgoing transfer of data.
Yet, do not have parameter indication eNB and P-GW among the SAE Qos for the continuous sequence number of up-downgoing GTP-U data head adding that transmits, thereby to cause the up-downgoing transfer of data be unordered.
In SAE, the implementation method of prior art comprises:
(1) scene of no eNB switching; As shown in Figure 4; Contrast through UMTS and SAE qos parameter can be known; Be not used in indication eNB and P-GW at the SAE qos parameter and in up-downgoing GTP-U data head, add continuous sequence number, guarantee the order of transfer of data, so have that transfer of data is unordered in the evolvement network now.
(2) the eNB handoff scenario is as shown in Figure 5.When eNB switches, set up the data forwarding passage between source eNB and the target eNB, eNB switches the change that possibly cause S-GW.Source eNB converting downlink data are divided into two kinds: a kind of is that source eNB sends to UE, but does not obtain the downlink data that UE confirms, these data have been passed through source eNB PDCP layer and handled, and carry the sequence number that the PDCP layer distributes in the GTP-U data head of therefore transmitting; Another kind is the GTP-U downlink data that source eNB does not also send to UE, just not through the processing of source eNB PDCP layer.Among the SAE, the downlink data that source eNB transmits need be transmitted to UE prior to the downlink data of S-GW, and just target eNB PDCP layer is less than S-GW's for the sequence number of source eNB converting downlink data allocations.
Before data forwarding was accomplished, P-GW, S-GW, target eNB had been set up the core-network side carrying, and target eNB and UE have set up the wireless side carrying, and the up-downgoing data are transmitted.The target eNB descending GTP-U data that eNB receives from the source; Receive the GTP-U data that issue of P-GW from S-GW; But do not have to add in the GTP-U data head of parameter indication P-GW before and after switching continuous sequence number at SAE QoS, cause consequence: the one, target eNB can't sort to the GTP-U that receives; The 2nd, target eNB can't confirm that eNB receives complete forwarding data from the source; The 3rd, target eNB PDCP layer can't be distinguished the downlink data of forwarding and the downlink data that S-GW sends, and adds correct sequence number to data, and the downlink data that assurance source eNB transmits is transmitted to UE prior to the downlink data of S-GW.
For the scene that UMTS switches to SAE, as shown in Figure 6, set up the data forwarding passage between source RNC and the target eNB, before data forwarding was accomplished, P-GW, S-GW, target eNB had been set up the core-network side carrying, and target eNB and UE have set up the wireless side carrying.
RNC receives descending GTP-U data to target eNB from the source at this moment, receives the GTP-U data that issue of P-GW from S-GW.If the transmission sequence parameter among the UMTS Qos is set; The GTP-U data head of source RNC forwarding just carries sequence number; And do not have parameter indication P-GW in the GTP-U data head, to add sequence number at SAE QoS; Target eNB was received and was had sequence number and not serialized GTP-U this moment, caused: the one, and target eNB can't sort to the downlink data of receiving; The 2nd, target eNB can't confirm whether the data of source RNC forwarding are complete; The 3rd, target eNB PDCP layer can't be distinguished the downlink data of forwarding and the downlink data that S-GW sends, and adds correct sequence number to data, and the downlink data that assurance source RNC transmits is transmitted to UE prior to the downlink data of S-GW.。
For the scene of SAE to the UMTS switching; Shown in Fig. 7 a and Fig. 7 b, set up the data forwarding passage between source eNB and the Target RNC, before data forwarding is accomplished; Core-network side carries two kinds and sets up mode: a kind of P-GW of being, S-GW, Target RNC are set up core-network side and are carried, shown in Fig. 7 a; Another kind is that P-GW, SGSN, S-GW, Target RNC set up core-network side and carry, and Target RNC and UE have set up the wireless side carrying, shown in Fig. 7 b.Because the parameter of not shining upon in proper order with the UMTSQos transmission in the SAE Qos parameter, it is unordered causing data forwarding.
In realizing process of the present invention, inventor of the present invention finds to exist in the prior art following shortcoming:
When switching between eNB switching or SAE and the UMTS, can not guarantee that the GTP-U data that target eNB receives are complete in order.
Summary of the invention
The embodiment of the invention provides a kind of method and apparatus of transfer of data, guarantees the order in the up-downgoing transfer of data.
The embodiment of the invention provides a kind of method of transfer of data, may further comprise the steps:
In the GTP-U data head that sends data, add sequence number; Specifically comprise: in the GTP-U data head, add sequence number according to System Architecture Evolution network SAE configuration parameter indication network equipment, said SAE configuration parameter comprises: a kind of among the harmless PDCP Lossless PDCP among the combination of a SAE QoS label or a plurality of SAE QoS label, the SAE Qos among mapping parameters delivery order, the SAE Qos;
Receive said data,, said reception data are sorted according to the sequence number in the GTP-U data head of said data.
The embodiment of the invention also provides a kind of target eNB node, comprising:
The network configuration unit; Be used to obtain the SAE configuration parameter, said SAE configuration parameter comprises: a kind of among the harmless PDCP Lossless PDCP among the combination of a SAE QoS label or a plurality of SAE QoS label, the SAE Qos among mapping parameters delivery order, the SAE Qos;
Up transmitting element is used for adding sequence number according to the SAE configuration parameter at up GTP-U data head;
Sequencing unit is used for when downlink data receiving, according to the sequence number in the GTP-U data head of said reception data, said reception data is sorted
Compared with prior art, the present invention has the following advantages:
In the embodiment of the invention; In descending GTP-U data, add continuous sequence number according to the label in the SAE qos parameter or label combination indication P-GW; Indication P-GW and eNB add continuous sequence number in the up-downgoing data; Thereby guarantee order, guarantee the complete in order of wireless side transfer of data in the up-downgoing transfer of data.
In addition; When between SAE and UMTS, switching; With SAE Qos parameter l abel or other parameter maps is the transmission order in the UMTS Qos parameter, makes destination node to receive consistent data with S-GW from the data forwarding passage, guarantees the complete in order of wireless side transfer of data.
Description of drawings
Fig. 1 is a UMTS system logic framework sketch map in the prior art;
Fig. 2 is a LTE/SAE network architecture sketch map in the prior art;
Fig. 3 is a user face protocol stack sketch map between eNB and the UE in the prior art;
Up-downgoing transfer of data sketch map when Fig. 4 is the scene that no eNB switches in the prior art;
Up-downgoing transfer of data sketch map when Fig. 5 is the scene that eNB switches in the prior art;
Fig. 6 is UMTS up-downgoing transfer of data sketch map when scene that SAE switches in the prior art;
Fig. 7 a and Fig. 7 b are SAE up-downgoing transfer of data sketch mapes when scene that UMTS switches in the prior art;
Fig. 8 is at eNB handoff scenario implementation sketch map in the embodiment of the invention;
Fig. 9 is that embodiment of the invention UMTS is to SAE handoff scenario sketch map;
Figure 10 a and Figure 10 b are that embodiment of the invention SAE is to UMTS handoff scenario sketch map.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail:
Increase sequence number through the SAE qos parameter to source eNB and P-GW configuration in the embodiment of the invention SAE system and (be generally continuous sequence number; But also possibly be sequence number with the certain rule ordering) function; Make node when sending data; In the GTP-U data head, add sequence number, thereby guarantee the order of up-downgoing transfer of data.Wherein, the SAE qos parameter includes but not limited in label or the label combination, the mapping parameters delivery order among the SAE Qos (transmission order), SAE Qos among the SAE QoS mapping Lossless PDCP etc.
The embodiment of the invention one provides a kind of implementation under the eNB handoff scenario, with reference to figure 8, according to the label in the SAE qos parameter (as shown in table 1, among the appendix B referring to TS23.401 v1.1.1; Definition such as the table 1 of SAE Qos parameter l abel; Also not standardization; Wherein the parameter among label value, label kind, the label possibly increase, revises or delete) or other parameters indication P-GW in descending GTP-U data head, add continuous sequence number; Indication eNB adds continuous sequence number in up GTP-U data head, thereby guarantees the order in the up-downgoing transfer of data.Fig. 8 scene is that P-GW, S-GW, target eNB have been set up the core-network side carrying before data forwarding is accomplished, and target eNB and UE have set up the wireless side carrying, and up-downgoing this moment data can be transmitted.
Table 1:
| Name?of?labelCharacteristic(Note?1) | L2?Packet?Delay?Budget | L2?Packet?Loss Rate | ExampleServices (examples of services) |
| 1(GBR) | ＜50ms | High(e.g.10 -1) | Real-time game |
| 2(GBR) | 50ms(80ms)(Note?2) | Medium(e.g.10 -2) | VoIMS |
| 3(GBR) | 250ms | Low(e.g.10 -3) | Data flow |
| 4(non-GBR) | Low(～50ms) | e.g.10 -6 | The IMS signal |
| 5(non-GBR) | Low(～50ms) | e.g.10 -3 | Interactive game |
| 6(non-GBR) | In (～250ms) | e.g.10 -4 | TCP is interactive |
| 7(non-GBR) | In (～250ms) | e.g.10 -6 | Preferred TCP blocks of data |
| 8(non-GBR) | High (～500ms) | n.a. | The TCP blocks of data of doing one's best |
In the present embodiment, according to the label in the SAE qos parameter or label combination, network in advance in eNB and P-GW configuration when label is designated value, eNB and P-GW are in up-downgoing GTP-U data head adding continuous sequence number.Specifically comprise:
1, switch when setting up user plane bearer before, network disposes on eNB and PGW when the Label in the SAE Qos parameter is 2,3, and eNB and P-GW add continuous sequence number in up-downgoing GTP-U data.
2, after source eNB, S-GW, P-GW user plane bearer set up before switching, the descending GTP-U data that have continuous sequence number that source eNB receives from S-GW that P-GW issues.
3. after switching, eNB receives descending GTP-U data to target eNB from the source, receives the descending GTP-U data from P-GW from S-GW.Because downlink data is all from P-GW, and P-GW is a continuous sequence number for the descending GTP-U data allocations before and after switching.
4. first GTP-U SN of receiving from S-GW of hypothetical target eNB is 5 packet; ENB receives that GTP-U SN is 1,3,4 packets from the source; Because P-GW is continuous sequence number for the downlink data distribution; Therefore eNB receives that SN is 4 packet from the source when target eNB, just can know the eNB data forwarding completion of current source.Through the ordering to packet, whether Target RNC is can judgment data complete, and current goal eNB ordering back result is 1,3,4,5, lacks 2 in order, and target eNB can require data to transmit again or other processing modes.
Special needs to be pointed out is that the data packet loss is handled in the repeating process, belongs to known technology in the industry, repeats no more at this.
Same P-GW also can judge that whether upstream data is complete in order, handles accordingly according to the sequence number of upstream data.
Another kind of implementation under the eNB handoff scenario has been described in the embodiment of the invention two; With reference to figure 8; Through the mapping parameters delivery order in SAE Qos (transmission order), indication eNB and P-GW are in up-downgoing GTP-U data head adding continuous sequence number.Wherein, The transmission order only is for describing the convenient title that adopts; This title can not limit embodiment of the invention applicable scope; Promptly in some system, perhaps do not have title one to one, still, can not think thus that the technical scheme in the embodiment of the invention can not be applicable to these systems.Specifically comprise:
1, switch when setting up user plane bearer before, the delivery order in the SAE Qos parameter (transmission order) is set to " being ", and this parameter indication eNB and P-GW add continuous sequence number in up-downgoing GTP-U data.
2, after source eNB, S-GW, P-GW user plane bearer set up before switching, the descending GTP-U data that have continuous sequence number that source eNB receives from S-GW that P-GW issues.
3. after switching, eNB receives descending GTP-U data to target eNB from the source, receives the descending GTP-U data from P-GW from S-GW.Because downlink data is all from P-GW, and P-GW is a continuous sequence number for the descending GTP-U data allocations before and after switching.
4. first GTP-U SN of receiving from S-GW of hypothetical target eNB is 5 packet; ENB receives that GTP-U SN is 1,3,4 packets from the source; Because P-GW is continuous sequence number for the downlink data distribution; Therefore eNB receives that SN is 4 packet from the source when target eNB, just can know the eNB data forwarding completion of current source.Through the ordering to packet, whether Target RNC is can judgment data complete, and current goal eNB ordering back result is 1,3,4,5, lacks 2 in order, and target eNB can require data to transmit again or other processing modes.
Special needs to be pointed out is that the data packet loss is handled in the repeating process, belongs to known technology in the industry, repeats no more at this.
Same P-GW also can judge that whether upstream data is complete in order, handles accordingly according to the sequence number of upstream data.
Having described another implementation under the eNB handoff scenario in the embodiment of the invention three, still is example with Fig. 8, and through mapping Lossless PDCP in SAE Qos, indication eNB and P-GW are in up-downgoing GTP-U data head adding continuous sequence number.Wherein, Lossless PDCP only is for describing the convenient title that adopts; This title can not limit embodiment of the invention applicable scope; Promptly in some system, perhaps do not have title one to one, still, can not think thus that the technical scheme in the embodiment of the invention can not be applicable to these systems.Specifically comprise:
1, switch when setting up user plane bearer before, the Lossless PDCP in the SAE Qos parameter (harmless PDCP) is set to " being ", and this parameter indication eNB and P-GW add continuous sequence number in up-downgoing GTP-U data.
2, after source eNB, S-GW, P-GW user plane bearer set up before switching, the descending GTP-U data that have continuous sequence number that source eNB receives from S-GW that P-GW issues.
3. after switching, eNB receives descending GTP-U data to target eNB from the source, receives the descending GTP-U data from P-GW from S-GW.Because downlink data is all from P-GW, and P-GW is a continuous sequence number for the descending GTP-U data allocations before and after switching.
4. first GTP-U SN of receiving from S-GW of hypothetical target eNB is 5 packet; ENB receives that GTP-U SN is 1,3,4 packets from the source; Because P-GW is continuous sequence number for the downlink data distribution; Therefore eNB receives that SN is 4 packet from the source when target eNB, just can know the eNB data forwarding completion of current source.Through the ordering to packet, whether Target RNC is can judgment data complete, and current goal eNB ordering back result is l, 3,4,5, lacks 2 in order, and target eNB can require data to transmit again or other processing modes.
Special needs to be pointed out is that the data packet loss is handled in the repeating process, belongs to known technology in the industry, repeats no more at this.
Same P-GW also can judge that whether upstream data is complete in order, handles accordingly according to the sequence number of upstream data.
Through the foregoing description one to embodiment three described eNB changing method; Under the eNB handoff scenario; In descending GTP-U data head, add continuous sequence number according to the label in the SAE qos parameter or other parameters indication P-GW; Indication eNB adds continuous sequence number in up GTP-U data head, thereby guarantees the order in the up-downgoing transfer of data.Though above embodiment is to be that example describes with the eNB handoff scenario, is not limited to this in the practical application,, can guarantee the order of up-downgoing data too for the scene that eNB switches does not take place.
The embodiment of the invention four; A kind of implementation under the SAE handoff scenario at UMTS is provided, as shown in Figure 9, set up the data forwarding passage between source RNC and the target eNB; Before data forwarding is accomplished; P-GW, S-GW, target eNB have been set up the core-network side carrying, and target eNB and UE have set up the wireless side carrying, and up-downgoing this moment data are transmitted.Need UTMS QoS be mapped as SAE QoS.If be provided with the transmission sequence parameter among the UMTS QoS, this parameter maps is added the SAE QoS label of continuous sequence number for supporting the GTP-U data head, this label can be that network configuration decides.Present embodiment specifically comprises:
1, before the switching; Transmit sequence parameter and be provided with in advance when Qos label is 3 when network among the SAE if be provided with among the UMTS QoS; ENB and P-GW add continuous sequence number in up-downgoing GTP-U data; When carrying out the Qos parameter maps so, UMTS Qos transmission is mapped as SAE Qoslabel 3 in proper order.
2, after source eNB, S-GW, P-GW user plane bearer set up before switching, the descending GTP-U data that have continuous sequence number that source RNC receives from S-GW/SGSN that P-GW issues.
3. after switching, RNC receives descending GTP-U data to target eNB from the source, receives the descending GTP-U data from P-GW from S-GW.Because downlink data is all from P-GW, and P-GW is a continuous sequence number for the descending GTP-U data allocations before and after switching.
4. first GTP-U SN of receiving from S-GW of hypothetical target eNB is 5 packet; RNC receives that GTP-U SN is 1,3,4 packets from the source; Because P-GW is continuous sequence number for the downlink data distribution; Therefore RNC receives that SN is 4 packet from the source when target eNB, just can know the RNC data forwarding completion of current source.Through the ordering to packet, whether target eNB is can judgment data complete, and current goal eNB ordering back result is 1,3,4,5, lacks 2 in order, and target eNB can require data to transmit again or other processing modes.
Special needs to be pointed out is that the data packet loss is handled in the repeating process, belongs to known technology in the industry, repeats no more at this.
Same P-GW also can judge that whether upstream data is complete in order, handles accordingly according to the sequence number of upstream data.
The embodiment of the invention five provides the another kind of implementation method of UMTS when SAE switches, and is example with Fig. 9, when SAE switches, need UTMS QoS be mapped as SAE QoS at UMTS.If a kind of among transmission order, the Lossless PDCP arranged among the SAE Qos, when switching so the transmission among the UMTS Qos is mapped as a kind of among SAE Qos label transmission order, the Lossless PDCP in proper order.Present embodiment specifically comprises:
1, before the switching; Transmit sequence parameter and when the transmission of SAE Qos parameter is " being " in proper order if be provided with among the UMTS QoS; ENB and P-GW add continuous sequence number in up-downgoing GTP-U data; When carrying out the Qos parameter maps so, UMTS Qos transmission is mapped as the transmission order among the SAE Qos in proper order.
2, after source eNB, S-GW, P-GW user plane bearer set up before switching, the descending GTP-U data that have continuous sequence number that source RNC receives from S-GW/SGSN that P-GW issues.
3. after switching, RNC receives descending GTP-U data to target eNB from the source, receives the descending GTP-U data from P-GW from S-GW.Because downlink data is all from P-GW, and P-GW is a continuous sequence number for the descending GTP-U data allocations before and after switching.
4. first GTP-U SN of receiving from S-GW of hypothetical target eNB is 5 packet; RNC receives that GTP-U SN is 1,3,4 packets from the source; Because P-GW is continuous sequence number for the downlink data distribution; Therefore RNC receives that SN is 4 packet from the source when target eNB, just can know the RNC data forwarding completion of current source.Through the ordering to packet, whether target eNB is can judgment data complete, and current goal eNB ordering back result is 1,3,4,5, lacks 2 in order, and target eNB can require data to transmit again or other processing modes.
Special needs to be pointed out is that the data packet loss is handled in the repeating process, belongs to known technology in the industry, repeats no more at this.
Same P-GW also can judge that whether upstream data is complete in order, handles accordingly according to the sequence number of upstream data.
When UMTS switched, Fig. 9 was the transmission diagram of up-downgoing this moment data at SAE.
The embodiment of the invention six has been described a kind of method when UMTS switches at SAE; With Figure 10 a or Figure 10 b is example; At first before data forwarding is accomplished; P-GW, S-GW, Target RNC have been set up the core-network side carrying, and Target RNC and UE have set up the wireless side carrying, then SAE QoS are mapped as UMTSQoS; If SAE QoS label adds continuous sequence number according to the network configuration needs at the GTP-U data head, it is mapped as among the UMTS QoS transmits sequence parameter.Present embodiment specifically comprises:
1, before the switching, if network is provided with in advance when Qos label is 3 among the SAE, eNB and P-GW add continuous sequence number in up-downgoing GTP-U data, when carrying out the Qos parameter maps so, SAEQos label 3 are mapped as UMTS Qos transmission order.
2, after source eNB, S-GW, P-GW user plane bearer set up before switching, the descending GTP-U data that have continuous sequence number that source eNB receives from S-GW that P-GW issues.
3. after switching, eNB receives descending GTP-U data to Target RNC from the source, receives the descending GTP-U data from P-GW from S-GW/SGSN.Because downlink data is all from P-GW, and P-GW is a continuous sequence number for the descending GTP-U data allocations before and after switching.
4. first GTP-U SN of receiving from S-GW of hypothetical target RNC is 5 packet; ENB receives that GTP-U SN is 1,3,4 packets from the source; Because P-GW is continuous sequence number for the downlink data distribution; Therefore eNB receives that SN is 4 packet from the source when Target RNC, just can know the eNB data forwarding completion of current source.Through the ordering to packet, whether Target RNC is can judgment data complete, and current goal RNC ordering back result is 1,3,4,5, lacks 2 in order, and Target RNC can require data to transmit again or other processing modes.
Special needs to be pointed out is that the data packet loss is handled in the repeating process, belongs to known technology in the industry, repeats no more at this.
Same P-GW also can judge that whether upstream data is complete in order, handles accordingly according to the sequence number of upstream data.
The embodiment of the invention seven has been described the another kind of method when UMTS switches at SAE, is example with Figure 10 a or Figure 10 b, and SAE QoS is mapped as UMTS QoS.If a kind of among transmission order, the Lossless PDCP arranged among the SAE Qos, when switching so with a kind of UMTS transmission order that is mapped as among the order of the transmission among the SAE Qos, the Lossless PDCP.Present embodiment specifically comprises:
1, before the switching, if among the SAE QoS label transmission sequence parameter is set, eNB and P-GW add continuous sequence number in up-downgoing GTP-U data, when carrying out the Qos parameter maps so, the SAEQos transmission are mapped as UMTS Qos transmission order in proper order.
2, after source eNB, S-GW, P-GW user plane bearer set up before switching, the descending GTP-U data that have continuous sequence number that source eNB receives from S-GW that P-GW issues.
3. after switching, eNB receives descending GTP-U data to Target RNC from the source, receives the descending GTP-U data from P-GW from S-GW/SGSN.Because downlink data is all from P-GW, and P-GW is a continuous sequence number for the descending GTP-U data allocations before and after switching.
4. first GTP-U SN of receiving from S-GW of hypothetical target RNC is 5 packet; ENB receives that GTP-U SN is 1,3,4 packets from the source; Because P-GW is continuous sequence number for the downlink data distribution; Therefore eNB receives that SN is 4 packet from the source when Target RNC, just can know the eNB data forwarding completion of current source.Through the ordering to packet, whether Target RNC is can judgment data complete, and current goal RNC ordering back result is 1,3,4,5, lacks 2 in order, and Target RNC can require data to transmit again or other processing modes.
Special needs to be pointed out is that the data packet loss is handled in the repeating process, belongs to known technology in the industry, repeats no more at this.
Same P-GW also can judge that whether upstream data is complete in order, handles accordingly according to the sequence number of upstream data.
Described in the implementation method of SAE when UMTS switches through the foregoing description six with embodiment seven; With the label among the SAE QoS or other parameter maps is the transmission order among the UMTS Qos; Set up the data forwarding passage between source RNC and the target eNB, make that eNB and S-GW receive complete downlink data in order to Target RNC from the source.
The embodiment of the invention also provides a kind of target eNB node specifically to comprise: the network configuration unit is used to obtain the SAE configuration parameter; Up transmitting element is used for adding sequence number according to the SAE configuration parameter at up GTP-U data head; Sequencing unit is used for when downlink data receiving, according to the sequence number in the GTP-U data head of said reception data, said reception data is sorted.Keep the data integrity unit,, then notify the transmit leg network equipment to resend the corresponding transmission data of sequence number in the said GTP-U data if be used for ordering back result for imperfect.First acquiring unit is used for UMTS when SAE switches, and obtains the SAE configuration parameter that is mapped to by the transmission sequence parameter among the UMTS Qos; First sequencing unit is used for resequencing according to said SAE configuration parameter transmission data that said GTP-U data sequence number from source node is corresponding with from the corresponding transmission data of sequence number in the GTP-U data of P-GW.Second acquisition unit is used to obtain the transmission sequence parameter of the UMTS that is mapped to by the SAE configuration parameter; Second sequencing unit is used for resequencing from the corresponding transmission data of the GTP-U data sequence number of source node with from the corresponding transmission data of sequence number in the GTP-U data of P-GW said according to the transmission sequence parameter of said UMTS.
The embodiment of the invention also provides a kind of grouped data network gateway specifically to comprise: the network configuration unit is used to obtain the SAE configuration parameter; Descending transmitting element is used for adding sequence number according to the SAE configuration parameter at up GTP-U data head; Sequencing unit when being used to receive upstream data, according to the sequence number in the GTP-U data head of said data, sorts to said reception data.Keep the data integrity unit,, then notify the transmit leg network equipment to resend the corresponding transmission data of sequence number in the said GTP-U data if be used for ordering back result for imperfect.
In the embodiment of the invention; In descending GTP-U data, add continuous sequence number according to the label in the SAE qos parameter or label combination indication P-GW; Indication P-GW and eNB add continuous sequence number in the up-downgoing data; Thereby guarantee order, guarantee the order and the non-destructive of wireless side transfer of data in the up-downgoing transfer of data.
In addition; When between SAE and UMTS, switching; With SAE Qos parameter l abel or other parameter maps is the transmission order in the UMTS Qos parameter, makes destination node to receive consistent data with S-GW from the data forwarding passage, guarantees the order and the non-destructive of wireless side transfer of data.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product is stored in the storage medium; Comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
More than disclosedly be merely several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (9)
1. the method for a transfer of data is characterized in that, may further comprise the steps:
In the general packet radio service tunnel agreement user GTP-U data head that sends data, add sequence number; Specifically comprise: in the GTP-U data head, add sequence number according to System Architecture Evolution network SAE configuration parameter indication network equipment, said SAE configuration parameter comprises: a kind of among the harmless PDCP Lossless PDCP among the combination of a SAE QoS label or a plurality of SAE QoS label, the SAE Qos among mapping parameters delivery order, the SAE Qos;
Receive said data,, said reception data are sorted according to the sequence number in the GTP-U data head of said data.
2. the method for transfer of data according to claim 1 is characterized in that, also comprises: if ordering back result for imperfect, then notifies the transmit leg network equipment to resend the corresponding transmission data of sequence number in the said GTP-U data.
3. like the method for the said transfer of data of claim 2, it is characterized in that,
The said network equipment is an enode, and the said sequence number that in the GTP-U data head that sends data, adds specifically comprises: said enode adds sequence number in the GTP-U of upstream data data head;
The said network equipment is grouped data network gateway P-GW, and the said sequence number that in the GTP-U data head that sends data, adds specifically comprises: said P-GW adds sequence number in the GTP-U of downlink data data head.
4. like the method for the said transfer of data of claim 3, it is characterized in that, also comprise: from UMTS when SAE switches,
If the transmission sequence parameter that is provided with among the UMTS Qos, said enode are obtained by transmitting the SAE configuration parameter that sequence parameter is mapped to;
Said enode is resequenced from the transmission data of sequence number correspondence in the GTP-U data of source node with from the corresponding transmission data of sequence number in the GTP-U data of P-GW said according to said SAE configuration parameter.
5. like the method for the said transfer of data of claim 3, it is characterized in that, also comprise: from SAE when UMTS switches,
Enode obtains the transmission sequence parameter of the UMTS that the SAE configuration parameter is mapped to;
Said enode is resequenced from the transmission data of sequence number correspondence in the GTP-U data of source node with from the corresponding transmission data of sequence number in the GTP-U data of P-GW said according to the transmission sequence parameter of said UMTS.
6. a target eNB node is characterized in that, comprising:
The network configuration unit; Be used to obtain the SAE configuration parameter, said SAE configuration parameter comprises: a kind of among the harmless PDCP Lossless PDCP among the combination of a SAE QoS label or a plurality of SAE QoS label, the SAE Qos among mapping parameters deliveryorder, the SAE Qos;
Up transmitting element is used for adding sequence number according to the SAE configuration parameter at up GTP-U data head;
Sequencing unit is used for when downlink data receiving, according to the sequence number in the GTP-U data head of said reception data, said reception data is sorted.
7. like the said target eNB node of claim 6, it is characterized in that, also comprise:
Keep the data integrity unit,, then notify the transmit leg network equipment to resend the corresponding transmission data of sequence number in the said GTP-U data if be used for ordering back result for imperfect.
8. like the said target eNB node of claim 6, it is characterized in that said destination node also comprises:
First acquiring unit is used for from UMTS when SAE switches, and obtains the SAE configuration parameter that is mapped to by the transmission sequence parameter among the UMTS Qos;
First sequencing unit is used for resequencing according to said SAE configuration parameter transmission data that said GTP-U data sequence number from source node is corresponding with from the corresponding transmission data of sequence number in the GTP-U data of P-GW.
9. like the said target eNB node of claim 6, it is characterized in that said destination node also comprises:
Second acquisition unit is used to obtain the transmission sequence parameter of the UMTS that is mapped to by the SAE configuration parameter;
Second sequencing unit is used for resequencing from the corresponding transmission data of the GTP-U data sequence number of source node with from the corresponding transmission data of sequence number in the GTP-U data of P-GW said according to the transmission sequence parameter of said UMTS.
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| WO2011157190A2 (en) * | 2011-06-07 | 2011-12-22 | 华为技术有限公司 | Data reception processing method and apparatus |
| CN105637935B (en) | 2014-07-10 | 2019-09-20 | 华为技术有限公司 | A kind of transmission method of data, system and relevant apparatus |
| US20160066222A1 (en) * | 2014-09-02 | 2016-03-03 | Nokia Solutions And Networks Oy | Multi-connectivity in a wireless network |
| WO2018119123A1 (en) * | 2016-12-20 | 2018-06-28 | Intel IP Corporation | Systems and methods for packet forwarding during handover procedures |
| WO2018148893A1 (en) * | 2017-02-15 | 2018-08-23 | 华为技术有限公司 | Data transmission method and device |
| CN110012506B (en) * | 2018-01-05 | 2021-01-15 | 中国移动通信有限公司研究院 | Data transmission method and communication equipment |
| CN116321250B (en) * | 2023-05-23 | 2023-09-19 | 北京星河亮点技术股份有限公司 | Data forwarding system and method |
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| CN1855821A (en) * | 2005-04-27 | 2006-11-01 | 北京三星通信技术研究有限公司 | Method for reporting wireless access information concerned |
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