WO2016000097A1 - Handover method, evolved base station and mobility management entity - Google Patents

Abstract

A handover method is provided in embodiments of the present invention. The method includes that: when detecting that the service of a terminal in the E-UTRAN is a small packet service, an eNB generates a handover request message; the eNB sends the handover request message to a MME, wherein the handover request message comprises the identification information of the terminal and the identification information of the small packet service, and the handover request message is used to request the MME to perform across RAT handover so that the terminal switches from the E-UTRAN to the UTRAN for performing the small packet service. In this way, when the eNB detects that the service of the terminal in the E-UTRAN is the small packet service, the eNB sends the handover request message to the MME so that the MME performs across RAT handover and switches the terminal performing the small packet service from the E-UTRAN to the UTRAN. In this way, after switched to the UTRAN, the terminal performs the small packet service in the UTRAN, so as to reduce data packet padding and improve transmission efficiency.

Description

 Method for handover, evolved base station, and mobility management entity

 Embodiments of the present invention relate to the field of communications, and, more particularly, to a method for handover, an evolved base station, and a mobility management entity. Background technique

 The Instant Message (IM) service is a service that performs communication services in real time. For example, IM services commonly found on the Internet are Windows Live Messenger, AOL Instant Messenger, Skype, WhatsApp, Gmail Talk, Yahoo! Messenger, .NET Messenger Service, Jabber, Tencent QQ, Fetion, and everyone's desktop.

 With the continuous development of mobile Internet services, the number of users using IM services through mobile communication networks is constantly increasing. With the development of smart mobile terminals, IM services in the form of applications (APP) are favored and used by more and more users.

 One feature of the IM business is always online. Long term evolution

Evolution, LTE) The system fully considers the burstiness and high speed of future IM services, and introduces the default Evolved Packet System (default EPS) bearer, which can truly realize "always online", such a large number of IM services. The introduction will not impact the LTE core network.

 Small data packets (referred to as "small packets") are a basic feature of the IM business. However, the bandwidth allocated by LTE is much larger than the requirement of transmitting small data packets, so there is a large amount of padding in the MAC PDU, which results in insufficient utilization of network resources and low transmission efficiency. Summary of the invention

 The embodiment of the invention provides a method for handover, which can switch the terminal of the E-UTRAN packet service to the UTRAN, thereby reducing the filling of the data packet.

In a first aspect, a method for handover is provided, the method comprising: when detecting that a service of a terminal in an evolved universal terrestrial radio access network E-UTRAN is a packet service, the evolved base station eNB generates a handover request message The eNB sends the handover request message to the mobility management entity MME, where the handover request message includes the identifier information of the terminal and the identifier information of the packet service, where the handover request message is used to request the MME to perform Cross-radio access technology RAT Switching to cause the terminal to handover from the E-UTRAN to the universal terrestrial radio access network UTRAN for packet service.

 With reference to the first aspect, in a first possible implementation manner of the first aspect, the method further includes: the eNB receiving a handover command message sent by the MME; the eNB sending a handover command to the terminal, The terminal is caused to switch to the UTRAN.

 A second aspect provides a method for handover, where the method includes: a mobility management entity MME receiving a handover request message sent by an evolved base station eNB, where the handover request message is detected by the eNB as an evolved type When the service of the terminal in the E-UTRAN of the universal terrestrial radio access network is sent by the packet service, the handover request message includes the identifier information of the terminal and the identifier information of the packet service, and the handover request message is used to request The MME performs a cross-RAT access handover to enable the terminal to handover from the E-UTRAN to a universal terrestrial radio access network UTRAN for packet service; the MME performs inter-RAT handover according to the handover request message So that the terminal switches from the E-UTRAN to the UTRAN for packet service.

 With reference to the second aspect, in a first possible implementation manner of the second aspect, the performing, by the MME, the cross-RAT handover according to the handover request message includes: sending, by the MME, a forwarding relocation request message to a serving general packet radio The service support node SGSN is configured to map the default evolved packet system EPS bearer context to the universal mobile communication system UMTS power delay PDP context; the MME receives the forward relocation response message sent by the SGSN.

 With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the method further includes: the MME sending a handover command message to the eNB.

 In a third aspect, an evolved base station eNB is provided, where the eNB includes: a generating unit, configured to generate a handover request when detecting that a service of a terminal in the evolved universal terrestrial radio access network E-UTRAN is a packet service a sending unit, configured to send the handover request message generated by the generating unit to the mobility management entity MME, where the handover request message includes identifier information of the terminal and identifier information of the packet service, the handover The request message is used to request the MME to perform a cross-radio access technology RAT handover such that the terminal switches from the E-UTRAN to the universal terrestrial radio access network UTRAN for packet service.

With the third aspect, in a first possible implementation manner of the third aspect, the eNB further includes: a receiving unit, where the receiving unit is configured to receive a handover command message sent by the MME; Used to send a handover command to the terminal, so that the terminal switches to the terminal UTRAN„

 In a fourth aspect, a mobility management entity MME is provided, where the MME includes: a receiving unit, configured to receive a handover request message sent by an evolved base station eNB, where the handover request message is performed by the eNB When the service of the terminal in the evolved universal terrestrial radio access network E-UTRAN is detected as a packet service, the handover request message includes the identifier information of the terminal and the identifier information of the packet service, and the handover The request message is used to request the MME to perform a cross-radio access technology RAT handover, so that the terminal switches from the E-UTRAN to the universal terrestrial radio access network UTRAN for packet service; and an execution unit, configured to receive according to the The handover request message received by the unit performs cross-RAT handover, so that the terminal switches from the E-UTRAN to the UTRAN for packet service.

 With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the execution unit, the method includes: a sending subunit and a receiving subunit: the sending subunit, configured to send a forwarding relocation request message to a service The general packet radio service support node SGSN is configured to map the default evolved packet system EPS bearer context to the universal mobile communication system UMTS power delay PDP context; the receiving subunit is configured to receive the forward relocation response message sent by the SGSN .

 With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the MME further includes: a sending unit, configured to send a handover command message To the eNB.

 In the embodiment of the present invention, when the eNB detects that the service of the terminal in the E-UTRAN is a packet service, the eNB sends a handover request message to the MME, so that the MME performs the cross-RAT handover, and the terminal that performs the service and the packet service is The E-UTRAN switches to UTRAN. In this way, after switching to the UTRAN, the terminal performs packet service in the UTRAN, which can reduce the filling of the data packet, thereby improving the transmission efficiency. DRAWINGS

 In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative labor.

 1 is a schematic diagram of a system in accordance with an embodiment of the present invention.

2 is a flow chart of a method for handover in accordance with an embodiment of the present invention. 3 is a flow chart of a method for handover in accordance with another embodiment of the present invention.

 4 is a schematic diagram of a flow for handover according to another embodiment of the present invention.

 Figure 5 is a block diagram of an evolved base station in accordance with one embodiment of the present invention.

 6 is a block diagram of a mobility management entity in accordance with one embodiment of the present invention.

 7 is a block diagram of an evolved base station in accordance with another embodiment of the present invention.

 Figure 8 is a block diagram of a mobility management entity in accordance with another embodiment of the present invention. detailed description

 The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative labor are within the scope of the present invention.

 LTE is a long-term evolution of the Universal Mobile Telecommunications System (UMTS) technology standard developed by the 3rd Generation Partnership Project (3GPP), namely the Universal Terrestrial Access Network (Universal Terrestrial). The long-term evolution of the Radio Access Network (UTRAN) is called the Evolved Universal Terrestrial Radio Access Network (E-UTRAN).

 It should be noted that, in the embodiment of the present invention, the terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a mobile terminal, a wireless communication device, a user agent, User equipment or User Equipment (UE). The terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and a wireless communication function. Handheld device, computing device, or other processing device connected to a wireless modem. The invention is not limited thereto.

1 is a schematic diagram of a system in accordance with an embodiment of the present invention. As shown in FIG. 1, the terminal 101 accesses the E-UTRAN 102, and the base station 103 of the E-UTRAN 102 is an evolved base station (evolved NodeB, e-NB or eNB). Then, the Mobility Management Entity (MME) 104, the Serving Gateway (S-GW) 105, the Packet Data Network Gateway (P-GW) 106, and the carrier's network protocol (Internet Protocol) , IP) Service 108 communicates. The interface between the Policy Control and Charging Rules Function (PCRF) 107 and the IP service 108 of the operator is an Rx interface. The interface between the PCRF 107 and the P-GW 106 is a Gx interface. The interface between the operator's IP service 108 and the P-GW 106 is the SGi interface. The interface between the P-GW 106 and the S-GW 105 is an S5/S8 interface. The interface between the S-GW 105 and the MME 104 is an S11 interface. The interface between the MME 104 and the base station 103 is an S1 interface. The interface between the terminal 101 and the E-UTRAN 102 is an LTE-Uu interface.

 2 is a flow chart of a method for handover in accordance with an embodiment of the present invention. The method shown in Figure 2 includes:

 201. When detecting that the service of the terminal in the E-UTRAN is a packet service, the eNB generates a handover request message.

 202. The eNB sends the handover request message to the MME.

 The handover request message includes the identifier information of the terminal and the identifier information of the packet service, where the handover request message is used to request the MME to perform a radio access technology (RAT) handover, so that the terminal Switch from E-UTRAN to UTRAN for packet service.

 In the embodiment of the present invention, when the eNB detects that the service of the terminal in the E-UTRAN is a packet service, the eNB sends a handover request message to the MME, so that the inter-RAT handover is performed by the MME, and the terminal that performs the packet service is from the E-UTRAN. Switch to UTRAN. In this way, after switching to the UTRAN, the terminal performs packet service in the UTRAN, which can reduce the filling of the data packet, thereby improving the transmission efficiency.

 It should be understood that the eNB is a base station in the E-UTRAN.

 Specifically, before 201, the terminal initiates a Non Access Stratum (NAS) service request procedure to the MME.

 Specifically, in 201, the eNB may determine, by using packet detection, that the service of the terminal is a packet service. For example, the eNB performs statistics on the characteristics of the service sent and received by the terminal. When the service feature of the terminal matches the characteristics of the packet service, the e B determines that the terminal is performing the packet service.

 Optionally, after 202, the method shown in FIG. 2 may further include: receiving, by the eNB, a handover command message sent by the MME, and the eNB sending a handover command to the terminal, so that the terminal switches to the UTRAN.

 Specifically, the handover command message includes a forward access channel (Forward Access CHannel,

FACH) description information, and the eNB forwards the description information of the FACH to the terminal, such that the terminal The switching can be performed according to the description information of the FACH. Among them, FACH is allocated by Radio Network Controller (RNC).

 It should be understood that after switching to UTRAN, the packet service of the Access Stratu (AS) layer is transmitted between the terminal and the base station (NodeB, NB) in the UTRAN. The packet service of the Non-Access Stratu (NAS) layer is transparently transmitted by the NB (or NB and RNC), and is served by the Serving GPRS (General Packet Radio Service Support Node, SGSN). Transfer between.

 3 is a flow chart of a method for handover in accordance with another embodiment of the present invention. The method shown in Figure 3 includes:

 301. The MME receives a handover request message sent by the e B, where the handover request message is sent by the eNB when detecting that the service of the terminal in the E-UTRAN is a packet service, where the handover request message includes the The identification information of the terminal and the identification information of the packet service, where the handover request message is used to request the MME to perform an inter-RAT handover, so that the terminal switches from the E-UTRAN to the UTRAN for packet service.

 302. The MME performs cross-RAT handover according to the handover request message, so that the terminal switches from the E-UTRAN to the UTRAN to perform packet service.

 In the embodiment of the present invention, the MME receives the handover request message sent by the eNB, and performs cross-RAT handover, so that the terminal switches from the E-UTRAN to the UTRAN to perform packet service. In this way, after switching to UTRAN, the terminal performs packet service in the UTRAN, which can reduce the filling of the data packet, thereby improving the transmission efficiency.

 Optionally, in 302, the MME sends a Forward Relocation Request message to the SGSN to map the default EPS bearer context to a Universal Mobile Telecommunications System (UMTS) Power Delay Profile (PDP) context. . And the MME receives the forwarding relocation response message sent by the SGSN.

 In this way, in the embodiment of the present invention, the default EPS bearer context is mapped to the UMTS PDP context, which can simplify the context negotiation interaction process of the terminal in the UTRAN. That is to say, the NAS signaling overhead of the frequent PDP context negotiation process carried on the UMTS system can be avoided.

Optionally, after 302, the method may further include: the MME sending a handover command message to the eNB. The handover command message may include the description information of the FACH. Further, the eNB may forward the description information of the FACH to the terminal by using a handover command, so that the terminal completes the handover according to the description information of the FACH. Here, the FACH is allocated by the RNC. Thus, in the embodiment of the present invention, when detecting that the service of the terminal in the E-UTRAN is a packet service, the eNB sends a handover request message to the MME, so as to perform cross-RAT handover by the MME, so as to facilitate the terminal from the E- The UTRAN switches to UTRAN. Moreover, after switching to the UTRAN, the terminal can be bundled and sent by the UMTS FACH bearer, so that the medium access control (MAC) layer protocol data unit (Protocol Data Unit, The filling of PDUs is wasteful, which in turn improves transmission efficiency.

 4 is a schematic diagram of a flow for handover according to another embodiment of the present invention. Among them, 401 to 414 are processes in which the terminal 101 initiates a NAS service request to the MME 104. specifically,

 401. The terminal 101 determines a NAS service request.

 402. The terminal 101 sends a radio resource control to the eNB 103.

RRC) connection request.

 403. The eNB 103 performs an RRC connection setup.

 404. The terminal 101 sends an RRC Connection Setup Complete message to the eNB 103. The RRC connection setup complete message includes a NAS service request.

 405. The eNB 103 sends an initial terminal message to the MME 104. The initial terminal message includes a NAS service request.

 It is also understood that the eNB 103 transparently transmits the NAS service request received in 404 to the MME 104. In this way, the process of NAS authentication can be further performed.

 406. The MME 104 sends an initial context setup request message to the eNB 103.

 Specifically, the initial context setup request message is an S1 application protocol (SI Application).

Protocol, S1AP) Initial context setup request message. The initial context setup request message includes address information of the S-GW 105 and Quality of Service (QoS).

 407, AS activation is performed between the eNB 103 and the terminal 101.

 408. The eNB 103 sends an RRC connection reconfiguration message to the terminal 101.

 409. The terminal 101 sends an RRC Connection Reconfiguration Complete message to the eNB 103.

 It can be understood that 407 to 409 are processes of radio bearer establishment. The establishment of the user plane radio bearer means the completion of the service request, and the synchronization of the EPS bearer between the terminal 101 and the network.

 410. The eNB 103 sends an initial context setup complete message to the MME 104.

 Specifically, the initial context setup complete message is an S1AP initial context setup complete message. The initial context setup complete message includes address information of the eNB 103.

411. The MME 104 sends a first update bearer request message to the S-GW 105. Specifically, the first update bearer request message includes address information of the eNB 103, and a RAT type.

 412. The S-GW 105 sends a second update bearer request message to the P-GW 106.

 Specifically, when the S-GW 105 detects that there is a change in the RAT type of the first update bearer request message received by the 411, the S-GW 105 sends a second update bearer request message to the P-GW 106, where the second update bearer The request message includes the RAT type.

 413. The P-GW 106 sends a second update bearer response message to the S-GW 105.

 414. The S-GW 105 sends a second update bearer response message to the MME 104.

 415, uplink and downlink user data transmission.

 It should be understood that 415 can be executed after 409. It should be understood that the uplink and downlink user data is transmitted between the eNB 103 and the S-GW 105/P-GW 106 via a GPRS Tunneling Protocol (GTP) tunnel.

 416. When the eNB 103 detects that the service of the terminal 101 in the E-UTRAN is a packet service, the eNB 103 generates a handover request message.

 Specifically, the step 416 can be referred to the foregoing step 201 in FIG. 2. To avoid repetition, details are not described herein again.

 It should be understood that the handover request message includes the identification information of the terminal and the information that the terminal performs the packet service.

 417. The eNB 103 sends a handover request message to the MME 104.

 Specifically, the step 416 can be referred to the foregoing step 202 in FIG. 2. To avoid repetition, details are not described herein again.

 Further, the MME 104 initiates an relocation process of the handover resource. specifically,

 418. The MME 104 sends a Forward Relocation Request message to the SGSN 112.

 The forwarding relocation request message includes an EPS bearer context list.

 By forwarding the relocation request message, the default EPS bearer context can be mapped to a PDP context.

 It should be understood that the forwarding relocation request message includes identification information of the terminal and identification information of the packet service.

419. The SGSN 112 sends a Generate Bearer Request message to the S-GW 105, and receives a Generate Bearer Response message sent by the S-GW 105. It should be noted that this step 419 is not necessary and is indicated by a broken line in FIG. Specifically, 419 is performed when the SGSN 112 determines that the S-GW needs to be relocated.

 420. The SGSN 112 sends a relocation request message to the RNC 111, and receives a relocation request acknowledgement message sent by the RNC 111.

 It should be understood that the relocation request message includes identification information of the terminal and identification information of the packet service.

 It can be understood that the relocation request message is used to request the RNC 111 to establish a wireless network resource.

 Specifically, after receiving the relocation request message, the RNC 111 allocates a Forward Access Channel (FACH) for the terminal performing the packet service.

 It can be understood that the RNC 111 performs resource relocation after receiving the relocation request message. Correspondingly, the relocation request acknowledgement message includes description information of the FACH.

 421. The SGSN 112 sends a Forward Relocation Response message to the MME 104.

 Specifically, the transmission of the Forward Relocation Response message may be understood to be that the SGSN 112 forwards the Relocation Request Acknowledgement message received from the RNC 111 in 420 to the MME 104.

 It can be understood that the forwarding relocation response message includes description information of the FACH.

 422. The MME 104 sends a handover command message to the eNB 103.

 It can be understood that the forwarding relocation response message includes description information of the FACH.

 423. The eNB 103 sends a handover command to the terminal 101.

 It can be understood that the forwarding relocation response message includes description information of the FACH.

 424. The terminal 101 accesses an access process of the UTRAN.

 Specifically, the terminal 101 accesses the UTRAN according to the description information of the FACH.

 Specifically, the process can be referred to the standard 3GPP TS 25.331. To avoid repetition, details are not described herein.

 425. The terminal 101 sends a handover complete message to the RNC 111.

 Specifically, after the terminal 101 accesses the UTRAN, a handover complete message is sent to the RNC 111.

426. The RNC 111 forwards the handover complete message to the eNB 103.

 Specifically, the eNB 103, upon receiving the handover complete message, may release the uplink/downlink transmission resources (not shown in FIG. 4) for the terminal transmission.

Thus, after the above process, the inter-RAT handover of the terminal 101 performing the packet service from the E-UTRAN to the UTRAN is realized. Specifically, after the handover, the base station of the UTRAN can use the FACH channel to bundle and transmit data packets of multiple IM users, thereby reducing the air interface side. The filling of the data packet can alleviate the pressure of the IM data blowout, and can also effectively improve the utilization of network resources.

 Thus, in the embodiment of the present invention, when detecting that the service of the terminal in the E-UTRAN is a packet service, the eNB sends a handover request message to the MME, so as to perform cross-RAT handover by the MME, so as to facilitate the terminal from the E- The UTRAN switches to UTRAN. Moreover, after switching to UTRAN, the FACH bearer can be used for transmission. UTRAN bundles and transmits data packets of multiple users, which can reduce the filling waste of MAC layer PDUs, thereby improving transmission efficiency.

 Figure 5 is a block diagram of an evolved base station in accordance with one embodiment of the present invention. The evolved base station eNB 500 shown in FIG. 5 includes a generating unit 501 and a transmitting unit 502.

 The generating unit 501 is configured to generate a handover request message when detecting that the service of the terminal in the evolved universal terrestrial radio access network E-UTRAN is a packet service. The sending unit 502 is configured to send the handover request message generated by the generating unit 501 to the mobility management entity MME, where the handover request message includes the identifier information of the terminal and the identifier information of the packet service, where the handover request message is used. The MME is requested to perform a cross-radio access technology RAT handover such that the terminal switches from the E-UTRAN to the universal terrestrial radio access network UTRAN for packet service.

 In this embodiment, when the eNB detects that the service of the terminal in the E-UTRAN is a packet service, the eNB sends a handover request message to the MME, so that the MME performs the inter-RAT handover, and the terminal that performs the packet service is from the E. - UTRAN switches to UTRAN. In this way, after switching to UTRAN, the terminal performs packet service in the UTRAN, which can reduce the filling of the data packet, thereby improving the transmission efficiency.

 Optionally, as an embodiment, the eNB 500 further includes a receiving unit, configured to receive a handover command message sent by the MME. Further, the sending unit 502 is further configured to send a handover command to the terminal, so that the terminal switches to the UTRAN.

 The eNB 500 shown in FIG. 5 can implement the processes implemented by the eNB in FIG. 2 and FIG. 4, and details are not described herein again to avoid repetition.

 6 is a block diagram of a mobility management entity in accordance with one embodiment of the present invention. The mobility management entity MME 600 shown in FIG. 6 includes: a receiving unit 601 and an executing unit 602.

The receiving unit 601 is configured to receive a handover request message sent by the evolved base station eNB, where the handover request message is that the eNB detects that the service of the terminal in the evolved universal terrestrial radio access network E-UTRAN is a packet When the service is sent, the handover request message includes the identifier information of the terminal and the identifier information of the packet service, where the handover request message is used to request the The MME performs a cross-radio access technology RAT handover such that the terminal switches from the E-UTRAN to the universal terrestrial radio access network UTRAN for packet service. The executing unit 602 is configured to perform cross-RAT handover according to the handover request message received by the receiving unit 601, so that the terminal switches from the E-UTRAN to the UTRAN to perform packet service.

 Thus, in the embodiment of the present invention, the MME receives the handover request message sent by the e B, and performs the cross

The RAT switches to cause the terminal to handover from the E-UTRAN to the UTRAN for packet service. In this way, after switching to the UTRAN, the terminal performs packet service in the UTRAN, which can reduce the filling of the data packet, thereby improving the transmission efficiency.

 Optionally, as an embodiment, the processing unit 602 can include a transmitting subunit and a receiving subunit. The sending subunit is configured to send a forwarding relocation request message to the serving general packet radio service support node SGSN to map the default evolved packet system EPS bearer context to the universal mobile communication system UMTS power delay spectrum PDP context. The receiving subunit is configured to receive a forwarding relocation response message sent by the SGSN.

 Optionally, as another embodiment, the MME 600 may further include a sending unit, configured to send a handover command message to the eNB.

 The MME 600 shown in FIG. 6 can implement the processes implemented by the MME in FIG. 3 and FIG. 4, and details are not described herein again to avoid repetition.

 7 is a block diagram of an evolved base station in accordance with another embodiment of the present invention. The evolved base station eNB 700 shown in FIG. 7 includes a processor 701, a memory 702, and a transceiver 703.

 The processor 701 is configured to generate a handover request message when detecting that the service of the terminal in the evolved universal terrestrial radio access network E-UTRAN is a packet service. The transceiver 703 is configured to send the handover request message generated by the processor 701 to the mobility management entity MME, where the handover request message includes identifier information of the terminal and identifier information of a packet service, where the handover request message is used. The MME is requested to perform a cross-radio access technology RAT handover such that the terminal switches from the E-UTRAN to the universal terrestrial radio access network UTRAN for packet service.

 In this embodiment, when the eNB detects that the service of the terminal in the E-UTRAN is a packet service, the eNB sends a handover request message to the MME, so that the MME performs the inter-RAT handover, and the terminal that performs the packet service is from the E. - UTRAN switches to UTRAN. In this way, after switching to UTRAN, the terminal performs packet service in the UTRAN, which can reduce the filling of the data packet, thereby improving the transmission efficiency.

The various components in eNB 700 are coupled together by a bus system 705, where bus system 705 In addition to the data bus, it also includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 705 in FIG.

 The method disclosed in the foregoing embodiments of the present invention may be applied to the processor 701 or implemented by the processor 701. Processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 701 or an instruction in the form of software. The processor 701 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, and the like. in. The storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702 and combines the hardware to perform the steps of the above method.

 Optionally, as an embodiment, the transceiver 703 is further configured to receive a handover command message sent by the MME. Further, it is further configured to send a handover command to the terminal, so that the terminal switches to the UTRAN.

 The eNB 700 shown in FIG. 7 can implement the processes implemented by e B in FIG. 2 and FIG. 4, and details are not described herein again to avoid repetition.

 Figure 8 is a block diagram of a mobility management entity in accordance with one embodiment of the present invention. The mobility management entity MME 800 shown in FIG. 8 includes: a processor 801, a memory 802, and a transceiver 803.

The transceiver 803 is configured to receive a handover request message sent by the evolved base station eNB, where the handover request message is that the eNB detects that the service of the terminal in the evolved universal terrestrial radio access network E-UTRAN is a packet The handover request message includes the identifier information of the terminal and the identifier information of the packet service, where the handover request message is used to request the MME to perform a cross-radio access technology RAT handover, so that the terminal The E-UTRAN switches to the universal terrestrial radio access network UTRAN for packet service. The processor 801 is configured to perform cross-RAT handover according to the handover request message received by the transceiver 803, so that the terminal The E-UTRAN switches to the UTRAN for packet service.

 Thus, in the embodiment of the present invention, the MME receives the handover request message sent by the e B, and performs cross-RAT handover, so that the terminal switches from the E-UTRAN to the UTRAN to perform packet service. In this way, after switching to the UTRAN, the terminal performs packet service in the UTRAN, which can reduce the filling of the data packet, thereby improving the transmission efficiency.

 The various components in the MME 800 are coupled together by a bus system 805, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of explanation, various buses are labeled as bus system 805 in FIG.

 The method disclosed in the foregoing embodiments of the present invention may be applied to the processor 801 or implemented by the processor 801. Processor 801 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 801 or an instruction in the form of software. The processor 801 described above can be a general purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete block diagram. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium such as RAM, flash memory, ROM, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in memory 802, and processor 801 reads the information in memory 802 and, in conjunction with its hardware, performs the steps of the above method.

 Optionally, as an embodiment, the processor 801 may be specifically configured to: send a forwarding relocation request message to the serving general packet radio service support node SGSN to map the default evolved packet system EPS bearer context to the universal mobile communication system UMTS power. Delayed PDP context. And receiving a forwarding relocation response message sent by the SGSN.

 Optionally, as another embodiment, the transceiver 803 is further configured to send a handover command message to the eNB.

 The MME 800 shown in FIG. 8 can implement the processes implemented by the MME in FIG. 3 and FIG. 4, and details are not described herein again to avoid repetition.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the technical solution. Apply application and design constraints. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

 A person skilled in the art can clearly understand that the specific working process of the system, the device and the unit described above can be referred to the corresponding process in the foregoing method embodiments for the convenience and brevity of the description, and details are not described herein again.

 In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise. The components displayed for the unit may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

 In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

 The functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a medium such as a USB flash drive, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk that can store program codes.

 The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Rights request  A method for switching, the method comprising:  When detecting that the service of the terminal in the evolved universal terrestrial radio access network E-UTRAN is a packet service, the evolved base station eNB generates a handover request message;  The eNB sends the handover request message to the mobility management entity MME,  The handover request message includes the identifier information of the terminal and the identifier information of the packet service, where the handover request message is used to request the MME to perform a handover across a radio access technology RAT, so that the terminal is from the E - UTRAN switches to the universal terrestrial radio access network UTRAN for packet service.  The method according to claim 1, wherein the method further comprises: receiving, by the eNB, a handover command message sent by the MME;  The eNB sends a handover command to the terminal to cause the terminal to switch to the UTRAN  3. A method for switching, the method comprising:  The mobility management entity MME receives the handover request message sent by the evolved base station eNB, where the handover request message is when the eNB detects that the service of the terminal in the evolved universal terrestrial radio access network E-UTRAN is a packet service. The handover request message includes the identifier information of the terminal and the identifier information of the packet service, where the handover request message is used to request the MME to perform a cross-radio access technology RAT handover, so that the terminal The E-UTRAN is handed over to the universal terrestrial radio access network UTRAN for packet service;  The MME performs a cross-RAT handover according to the handover request message, so that the terminal switches from the E-UTRAN to the UTRAN for packet service.  The method according to claim 3, wherein the performing, by the MME, the cross-RAT handover according to the switching request message includes:  Sending, by the MME, a Forward Relocation Request message to a serving general packet radio service support node SGSN, to map the default evolved packet system EPS bearer context to the universal mobile communication system UMTS power delay spectrum PDP context;  The MME receives a Forward Relocation Response message sent by the SGSN.  The method according to claim 3 or 4, wherein the method further comprises: the MME sending a handover command message to the eNB. An evolved base station eNB, where the eNB includes: a generating unit, configured to generate a handover request message when detecting that the service of the terminal in the evolved universal terrestrial radio access network E-UTRAN is a packet service;  a sending unit, configured to send the handover request message generated by the generating unit to a mobility management entity MME, where  The handover request message includes the identifier information of the terminal and the identifier information of the packet service, where the handover request message is used to request the MME to perform a handover across a radio access technology RAT, so that the terminal is from the E - UTRAN switches to the universal terrestrial radio access network UTRAN for packet service.  The evolved base station according to claim 6, wherein the eNB further comprises a receiving unit:  The receiving unit is configured to receive a handover command message sent by the MME;  The sending unit is further configured to send a handover command to the terminal, so that the terminal switches to the UTRAN.  A mobility management entity MME, wherein the MME comprises:  a receiving unit, configured to receive a handover request message sent by the evolved base station eNB, where the handover request message is that the eNB detects that the service of the terminal in the evolved universal terrestrial radio access network E-UTRAN is a packet service The handover request message includes the identifier information of the terminal and the identifier information of the packet service, where the handover request message is used to request the MME to perform a cross-radio access technology RAT handover, so that the terminal Switching from the E-UTRAN to the universal terrestrial radio access network UTRAN for packet service;  And an execution unit, configured to perform a cross-RAT handover according to the handover request message received by the receiving unit, so that the terminal switches from the E-UTRAN to the UTRAN for packet service.  The mobility management entity according to claim 8, wherein the execution unit comprises: a sending subunit and a receiving subunit:  The sending subunit is configured to send a forwarding relocation request message to the serving general packet radio service support node SGSN to map the default evolved packet system EPS bearer context to the universal mobile communication system UMTS power delay spectrum PDP context;  The receiving subunit is configured to receive a forwarding relocation response message sent by the SGSN. The mobility management entity according to claim 8 or 9, wherein the MME further comprises a sending unit:  The sending unit is configured to send a handover command message to the eNB.