WO2006056127A1 - Systeme de reseau d'acces radio et procede pour la realisation d'un transfert - Google Patents
Systeme de reseau d'acces radio et procede pour la realisation d'un transfert Download PDFInfo
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- WO2006056127A1 WO2006056127A1 PCT/CN2005/001987 CN2005001987W WO2006056127A1 WO 2006056127 A1 WO2006056127 A1 WO 2006056127A1 CN 2005001987 W CN2005001987 W CN 2005001987W WO 2006056127 A1 WO2006056127 A1 WO 2006056127A1
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- 238000012545 processing Methods 0.000 claims abstract description 17
- 230000005012 migration Effects 0.000 claims description 107
- 238000013508 migration Methods 0.000 claims description 107
- 230000005540 biological transmission Effects 0.000 claims description 67
- 230000004044 response Effects 0.000 claims description 31
- 230000008569 process Effects 0.000 claims description 30
- 238000005259 measurement Methods 0.000 claims description 9
- 230000007423 decrease Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 8
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- 238000006243 chemical reaction Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
- H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
- H04W36/1443—Reselecting a network or an air interface over a different radio air interface technology between licensed networks
Definitions
- the present invention relates to the field of radio access network technologies in wireless communications, and in particular, to a radio access network system and a method for implementing the same. Background of the invention
- FIG. 1 is a radio access network system in a wireless network in the prior art.
- the radio access network is composed of one or several Radio Network Gateways (R Gs), one or several base stations Node B, and the RNG and the Node B are in a many-to-many connection relationship.
- R Gs Radio Network Gateways
- Node B base stations
- Node B base stations
- the RNG and the Node B are in a many-to-many connection relationship.
- each figure of the present invention includes only one RNG and two Node Bs.
- the RG 101 is connected to the core network (CN, Core Network) 100 through the Iu interface, the RNG 101 and the Node B 102 ⁇ Node B 103 are connected through the Iu interface, and the Node B 102 and the Node B 103 can communicate with the UE through the radio link.
- the communication between the Node B 102 and the Node B 103 is connected through the Iur interface; and the User Equipment (UE) 104 can access the Node B.
- UE User Equipment
- the RNG 101 can only perform functions such as system broadcast, paging, and forwarding of RANAP/RNSAP messages, and cannot perform operations such as radio resource control and management related to the UE radio interface protocol stack; in contrast, the Node B 102, In addition to the wireless signal spreading, modulation, coding, baseband and RF signal conversion, the Node B 103 can also complete the radio resources related to the UE radio interface protocol stack. Control and management operations.
- FIG. 2 is a flowchart of performing MDC when the user equipment is switched in the prior art. Includes the following steps:
- Step 201 The UE periodically receives pilot signals of all cells that it can receive, and transmits a pilot measurement message including the pilot signal to the source cell base station.
- the source cell base station uses the cell as a target cell, and sends a radio link setup request to the target cell base station, where the request includes a source.
- the method for the source cell base station to learn whether the pilot signal reaches a certain strength is generally: a pilot signal strength threshold is preset in the source cell base station, and if the strength of the pilot signal exceeds the threshold, the source The cell base station considers that the pilot signal has reached a certain strength.
- Step 202 The target cell base station that receives the radio link setup request newly allocates a radio channel to the UE according to the channel parameters such as the radio configuration included in the request. After the target cell base station allocates the wireless channel, the channel configuration of the wireless channel is fed back to the source cell base station, and the source cell base station sends an activation set update message to the UE according to the received channel configuration. After receiving the message, the UE saves the message.
- the active set is updated, that is, the foregoing wireless channel allocated by the target cell to the UE is added to the active set, and the access target base station is a newly allocated wireless channel of the UE.
- the target cell base station establishes a radio link with the UE. Thereafter, the target cell base station transmits the received UE radio signal to the source cell base station through an interface between itself and the source cell base station.
- Step 203 The source cell base station performs MDC operation on the UE radio signal received by itself and the UE radio signal sent from the target cell base station, so that the radio signal strength of the UE is improved.
- Steps 204-205 The source cell base station sends the UE radio signal that completes the MDC operation to the RG. The RG then sends the received completed UE radio signal to the CN.
- the CN After receiving the above-mentioned UE wireless signal, the CN performs corresponding processing on the signal.
- the signal is a service request, and the CN allocates corresponding radio resources according to the signal and performs subsequent corresponding operations.
- FIG. 3 is a schematic diagram of performing MDC in a radio access network in the prior art.
- the UE 304 accesses the target Node B 303, it maintains a wireless connection with the source Node B 302 and the target Node B 303, respectively.
- the MDC operation is divided into the following steps:
- Step a The target Node B 303 sends the received UE 304 radio signal to the source Node B 302 through its interface with the source Node B 302.
- Step b The source Node B 302 performs an MDC operation on the UE 304 radio signal received by itself and the UE 304 radio signal sent from the target Node B 303, and sends the merged UE 304 radio signal to the RNG 301.
- Step c The RNG 301 transmits the received UE 304 wireless signal that has been merged to the CN 300.
- FIG. 4 is a schematic diagram of performing MDC in another wireless access network of the prior art.
- the "X" between the source Node B 402 and the target Node B 403 indicates that the interface between the source Node B 402 and the target Node B 403 has failed, or the interface does not support the service currently being performed by the UE, such as The above interface cannot meet the bandwidth required for the ongoing service of the UE, so that the source Node B 402 and the target Node B 403 cannot directly communicate with each other.
- the MDC operation is divided into the following steps:
- Step a The target No, de B 403 wishes to transmit the received UE 404 radio signal to the source Node B 402 through its interface with the source Node B 402, but since the source Node B 402 and the target Node B 403 cannot each other Direct communication, so the source Node B 402 can only communicate with the target Node B 403 through the RNG 401, that is: the target Node B 403 sends the received UE 404 wireless signal to the RNG 401.
- Step b The RNG 401 sends the received UE 404 radio signal to the source Node B 402.
- Step c The source Node B 402 performs an MDC operation on the UE 404 wireless signal received by itself and the UE 404 wireless signal sent from the R G 401, and transmits the completed UE 404 wireless signal to the RNG 401.
- Step d The RNG 401 transmits the received UE 404 wireless signal that has been merged to the CN 400.
- the main object of the present invention is to provide a radio access network system, which simplifies the handover procedure in the radio access network, reduces the occupancy rate of the radio transmission resources, and reduces the data transmission delay in the radio access network.
- Another object of the present invention is to provide a method for implementing handover in a radio access network system, which simplifies a handover procedure in a radio access network, reduces occupancy rate of radio transmission resources, and reduces data transmission delay in a radio access network. .
- the invention discloses a wireless access network system, and the system comprises:
- the source user terminal UE accessing device is configured to send a radio interface protocol stack upload request to the protocol stack migration decision point when the UE that maintains the wireless connection with itself, when receiving the radio interface protocol sent from the protocol stack migration decision point After the stack is moved up, the radio interface protocol stack that has been established for the UE is deleted, and the received UE radio signal is sent to the protocol stack migration decision point.
- a target UE accessing device configured to establish a wireless connection with the UE, and send the received UE wireless signal to the protocol stack migration decision point;
- the protocol stack migration decision point is connected to the source UE access device and the target UE access device, and is configured to establish an instance of the radio interface protocol stack for the UE after receiving the radio interface protocol stack uplink request, and from the source,
- the UE radio signal of the target UE access device performs processing including macro diversity combining.
- the source and target UE access devices are edge wireless stations ERS, and the protocol stack migration decision point is an internet protocol access gateway IAGW, and the IAGW is connected to the ERS through an internet protocol IP network.
- the source and target UE access devices are base stations, and the protocol stack migration decision point is a wireless network gateway.
- the invention also discloses a method for implementing handover by a wireless access network system, the method comprising the following steps:
- a protocol stack migration decision point establishes a wireless interface protocol stack instance for the UE, and controls the source UE access device to delete an instance of the wireless interface protocol stack that was established for the UE when the UE normally communicates;
- the target UE access device establishes a wireless connection with the UE, and establishes a transmission link with the protocol stack migration decision point, and the source UE access device establishes a transmission link between itself and the protocol stack migration decision point;
- step a the process of establishing the wireless interface protocol stack instance by the protocol stack migration decision point is:
- the source UE access device sends a radio interface protocol stack up request for the UE handover to the protocol stack migration decision point, and after the protocol stack migration decision point receives the radio interface protocol stack uplink request, the radio interface protocol stack instance for the UE is established. .
- the method for the protocol stack migration decision point to control the source UE access device to delete the wireless interface protocol stack instance is:
- the protocol stack migration decision point sends a radio interface protocol stack uplink response to the source UE access device, and after receiving the uplink response of the radio interface protocol stack, the source UE access device deletes the radio interface protocol stack that it has established for the UE. Example.
- the method further includes:
- the source UE access device determines whether the received pilot measurement message sent by the UE includes a pilot signal of the UE access device that reaches a preset strength threshold, and if so, And the UE access device corresponding to the pilot signal is used as the target UE access device, and the radio interface protocol stack uplink request is sent to the protocol stack migration decision point.
- step a the target UE access device establishes a wireless connection with the UE, establishes a transmission link with the protocol stack migration decision point, and the source UE access device establishes itself to the protocol stack migration decision point.
- the protocol stack migration decision point sends a transmission link setup request to the source and target UE access devices; and after the source UE access device receives the transmission link setup request, establishes a relationship with the protocol stack migration decision point. a transmission link; after receiving the transmission link setup request, the target UE access device allocates a radio channel to the UE, and establishes a transmission link with the protocol stack migration decision point;
- the target UE access device After the target UE access device allocates a radio channel to the UE, it sends a transmission link setup response to the protocol stack migration decision point; after the protocol stack migration decision point receives the transmission link setup response, the source UE accesses the device. Sending an active set update command to the UE; after receiving the active set update command, the UE updates the activated set saved by itself and accesses the wireless channel allocated by the target UE access device for the UE.
- the UE Before the step b, the UE further performs a softer handover softer handover within the signal coverage of the source UE access device and/or the target UE access device; in step b, the source and target UE access device
- the method for transmitting the UE wireless signal by the protocol stack migration decision point is:
- the source UE access device and/or the target UE access device perform a softer merge and softer combing on the UE wireless signal received by the UE, and then send the softener combing UE wireless signal to the protocol stack migration decision point.
- the UE further performs soft handover within the signal coverage of the source UE access device and/or the target UE access device.
- the source and target UE access devices access the protocol stack.
- the method for transmitting the UE wireless signal by the migration decision point is: The source UE access device and/or the target UE access device directly transmit the UE wireless signal received by the UE to the protocol stack migration decision point.
- step b the method further includes:
- the UE receives the pilot signals of all UE access devices that it can receive, and sends the pilot signals to the protocol stack migration decision point; when the protocol stack migration decision point determines that the pilot signal strength of the UE access device from the UE is reduced to a certain value
- the UE sends a link release request to the UE access device corresponding to the pilot signal. After receiving the link release request, the UE access device releases the radio resource allocated to the UE.
- the UE After the UE access device releases the radio resource allocated to the UE, the UE only maintains a wireless connection with one UE access device, and the method further includes the following steps:
- the protocol stack migration decision point After receiving the downlink response of the radio interface protocol stack, the protocol stack migration decision point deletes the radio interface protocol stack instance that it has established for the UE.
- the UE access device is a base station, and the protocol stack migration decision point is a wireless network gateway; in step b, after the UE wireless signal processing is completed, the completed UE wireless signal is further sent to the core network.
- the source UE access device is configured to delete the radio interface protocol stack instance established for the UE, and send the received UE radio signal to the protocol stack migration.
- a decision point the target UE access device is configured to send the received UE radio signal to the protocol stack migration decision point
- the protocol stack migration decision point is used to establish a radio interface protocol stack instance for the UE, and connect to the source and target UEs.
- the UE wireless signal entering the device performs processing including MDC, and the switching process in the radio access network is compressed. Reduce the occupation rate of wireless transmission resources and reduce the data transmission delay in the wireless access network.
- the method for implementing the handover by the radio access network system when the UE performs the handover, the source UE access device is deleted as the radio established by the UE by the signaling interaction between the source UE access device and the protocol stack migration decision point.
- An interface protocol stack instance, the protocol stack migration decision point establishes a wireless interface protocol stack instance for the UE; and the target UE access device establishes a wireless connection with the UE; the source and target UE access devices send the received UE wireless signal to
- the protocol stack migration decision point, the protocol stack migration decision point performs processing including the MDC on the received UE wireless signal, simplifies the handover process in the radio access network, reduces the occupancy rate of the wireless transmission resource, and reduces the radio access. Data transmission delay in the network. BRIEF DESCRIPTION OF THE DRAWINGS
- FIG. 1 is a system diagram of a radio access network in a wireless network of the prior art
- FIG. 3 is a schematic diagram of performing MDC in a radio access network in the prior art
- FIG. 4 is a schematic diagram of performing MDC in another radio access network in the prior art
- FIG. 5 is a preferred embodiment of the present invention.
- FIG. 6 is a schematic diagram of performing MDC in a radio access network according to a preferred embodiment of the present invention
- FIG. 7 is a radio access in another wireless network in the prior art. Network system diagram
- FIG. 8 is a flowchart of performing an MDC when a user equipment is switched according to another preferred embodiment of the present invention.
- FIG. 9 is a schematic diagram of the handover process of the present invention. Mode for carrying out the invention
- the source UE access device is used to delete The radio interface protocol stack instance established by the UE, and the received UE radio signal is sent to the protocol stack migration decision point;
- the target UE access device is configured to send the received UE radio signal to the protocol stack migration decision point;
- the decision point is used to establish an instance of the radio interface protocol stack for the UE, and performs processing including the MDC on the UE radio signal from the source and target UE access devices.
- the method for implementing the handover by the radio access network system when the UE performs the handover, the source UE access device is deleted as the radio established by the UE by the signaling interaction between the source UE access device and the protocol stack migration decision point.
- An interface protocol stack instance, the protocol stack migration decision point establishes a wireless interface protocol stack instance for the UE; and the target UE access device establishes a wireless connection with the UE; the source and target UE access devices send the received UE wireless signal to
- the protocol stack migration decision point is processed by the protocol stack migration decision point to the received UE wireless signal including MDC.
- the RNG in the radio access network system of the present invention can perform operations such as control and management of radio resources in addition to functions such as system broadcast, paging, and forwarding of RANAP/RNSAP messages, so that the RNG can still be based on the UE switching. Corresponding requests for related MDC operations.
- FIG. 5 is a flowchart of performing MDC when a user equipment is switched according to a preferred embodiment of the present invention, where the process includes the following steps:
- Step 501 The UE periodically receives the pilot signals of all the cells that it can receive, and sends a pilot measurement message including the pilot signal strength to the source cell base station.
- the source cell base station uses the cell as a target cell, and sends an MDC uplink request to the RNG.
- the target cell and the source cell are two cells respectively covered by radio signals of different base stations.
- the uplink request includes a radio interface protocol stack with respect to UE handover in a source cell base station Set information, such as: data transmission format, data transmission rate, whether to retransmit when the data transmission error, etc.; the above uplink request also includes channel parameters such as the wireless configuration of the wireless channel allocated by the source cell base station to the UE.
- Step 502 After receiving the MDC upload request, the RNG creates a radio interface protocol stack instance for the UE according to the configuration information included in the request, to process the radio resource control and management in the subsequent handover process of the UE. Thereafter, the RNG sends an MDC uplink response to the source cell base station.
- the RNG When receiving the MDC uplink request, the RNG also sends a transmission link setup request to the source and target cell base stations respectively, requesting the source cell base station to newly establish a transmission link to the RNG; and requesting the target cell base station to establish the UE via the target cell base station to the RNG. Transmission link.
- Step 503 After receiving the MDC uplink response, the source cell base station deletes the radio interface protocol stack instance that it has established for the UE, so that the source cell base station does not process the radio resource control, management, and the like in the subsequent handover process of the UE.
- the target cell base station After receiving the transmission link setup request, the target cell base station establishes a transmission link between itself and the RNG, and newly allocates a radio channel for the UE, and then returns a transmission link establishment response to the RNG; the RNG passes the response according to the response.
- the source base station sends an activation set update command to the UE. After receiving the command, the UE accesses the target cell to the newly allocated radio channel of the UE, and updates the activated set saved by the UE, that is, the wireless device that allocates the target cell to the UE. The channel is added to the above active set.
- the source cell base station After receiving the transmission link setup request, the source cell base station establishes a transmission link between itself and the RNG.
- the reason for the source cell base station to establish a transmission link between itself and the RG is: Before the RNG establishes the radio interface protocol stack instance for the UE, the transmission link between the source cell base station and the RG for the UE is based on the Iu interface; After the RNG establishes the radio interface protocol stack instance for the UE, since the RG is to process the UE radio signal from the source cell base station, the Iu interface-based transmission link cannot be used again, which makes The source cell base station needs to establish a transmission link between itself and the RNG, and the transmission link is usually based on the Iub interface.
- Step 504 After completing step 503, the target cell base station establishes a radio link with the UE, and also establishes a transmission link with the RNG.
- the target cell base station sends the received UE radio signal to the RNG.
- the source cell base station establishes a transmission link with the RNG while maintaining a wireless connection with the UE.
- the source cell base station transmits the received UE radio signal to the R G.
- Step 505 The R G performs an MDC operation on the received UE radio signal sent from the source and target cell base stations.
- Step 506 The RNG sends the UE radio signal that completes the MDC operation to the CN.
- the CN After receiving the above-mentioned UE wireless signal, the CN performs corresponding processing on the signal.
- the signal is a service request, and the CN allocates corresponding radio resources according to the signal and performs subsequent corresponding operations.
- the RNG 601 can perform operations such as control and management of radio resources.
- the source Node B 602 performs the wireless signal expansion in addition to the target Node B 603.
- it In addition to the conversion of frequency, modulation, coding, baseband signals and RF signals, it also performs operations such as control and management of radio resources.
- the UE 604 accesses the target Node B 603, it is connected to the source Node B 602.
- the target Node B 603 maintains a wireless connection, respectively.
- the source Node B 602 since the source Node B 602 has deleted the radio interface protocol stack instance that it has established for the UE 604, the source Node B 602 does not process the radio resource control, management, and the like in the subsequent handover process of the UE 604.
- the RNG 601 can process the radio resource control and management in the subsequent handover process of the UE 604 by creating a new radio interface protocol stack instance for the UE.
- the MDC operation when the UE 604 is switched is divided into the following steps:
- Step a The source Node B 602 and the target Node B 603 respectively send the radio signals of the UE 604 received by themselves to the R G 601.
- Step b The RNG 601 performs an MDC operation on the received UE radio signal sent from the source Node B 602 and the target Node B 603, and sends the UE radio signal that completes the MDC operation to the CN 600.
- the MDC operation in the UE handover process can be completed in only two steps.
- the UE maintains a wireless connection with the source and target cell base stations, and the target cell base station may be one or more. .
- FIG. 7 shows the existing A diagram of a wireless access network system in another wireless network.
- the Internet Protocol (IP) network 730 is connected to an Edge Radio Station (ERS) 740, an ERS 750, and an ERS 760, respectively.
- the IP network 730 is also associated with an IP Access Gateway (IAGW, IP Access GateWay). 710.
- IAGW IP Access Gateway
- IP Access GateWay IP Access Gateway
- the ERS integrates the base station in the current 3G communication network with a Radio Network Controller (RNC), and can implement a universal wireless communication system radio access network (UTRAN, UMTS Territorial) that can be implemented by the base station and the RNC.
- RNC Radio Network Controller
- the Node is integrated with the Gateway General Packet Radio Service Node (GGSN) to implement the functions of the CN that can be implemented by the SGSN and the GGSN.
- GGSN Gateway General Packet Radio Service Node
- Each ERS can establish a connection relationship with any one or more IAGWs that are not fixed through the IP network 730.
- radio interface protocol stack for the UE in the IAGW, that is, a radio interface protocol stack such as PDCP/BMC/RLC/MAC; and like the Node B, there is a UE for the ERS.
- Wireless interface protocol stack This allows the IAGW to perform functions such as system broadcast, paging, and RANAP/RNSAP message forwarding, and cannot perform operations such as radio resource control and management related to the UE radio interface protocol stack; in contrast, ERS can complete wireless In addition to signal spread spectrum, modulation, coding, baseband signal and RF signal conversion, it can also perform operations such as radio resource control and management related to the UE radio interface protocol stack.
- Step 801 The source ERS receives the measurement report of the UE, and sends a radio interface protocol stack context up request to the IAGW according to the report.
- Step 802 The IAGW establishes a radio interface protocol stack instance for the UE according to the radio interface protocol stack context up request from the source ERS, and sends a radio interface protocol stack context up response to the source ERS; and simultaneously sends a handover request to the target ERS.
- Step 803 The source ERS deletes the radio interface protocol stack instance established by itself as the UE according to the received radio interface protocol stack context shift response, and establishes a transmission link between itself and the IAGW; the target ERS establishes its own transmission chain to the IAGW. Road and between itself and the UE Wireless link. The reason why the source ERS creates its own transmission link to the IAGW is the same as the corresponding reason in step 503.
- Step 804 The source and target ERS respectively send the UE wireless signal received by the ERS to the IAGWo.
- the steps 801 to 805 in FIG. 8 are basically the same as the steps 501 to 505 in FIG. 5 respectively, except that the operating entity is changed from R G and CN in FIG. 5 to the ERS and IAGW in FIG. 8 .
- the functions of the radio interface protocol stack context up request and the radio interface protocol stack context shift response in FIG. 8 are the same as those of the MDC up shift request and the MDC up shift response in FIG. 5, respectively.
- the wireless interface protocol stack context shift request and the MDC upload request are both for the uplink of the radio interface protocol stack for the UE; the wireless interface protocol stack context shift response and the MDC uplink response are both for continuing Switching process.
- the base station and the ERS are collectively referred to as a UE access device; the RNG and the IAGW are collectively referred to as a protocol stack migration decision point; and the MDC uplink request and the wireless interface protocol stack context up request are collectively referred to as The wireless interface protocol stack moves up the request; the MDC uplink response and the wireless interface protocol stack context up-shift response are collectively referred to as the wireless interface protocol stack uplink response.
- the UE When the UE maintains a wireless connection with the source and target UE access devices, it periodically receives the pilot signals of all the UE access devices that it can receive, and migrates the decision point to the protocol stack through the source UE access device. A pilot measurement message containing the pilot signal described above is transmitted.
- the protocol stack moves When the shift decision point determines that the pilot signal strength of a certain UE access device included in the pilot measurement message from the UE is reduced to a certain extent, the link release request is sent to the UE access device; the UE access device After receiving the link release request, the radio resources allocated for the UE are released.
- the protocol stack migration decision point sends an activation set update message to the UE, and after receiving the message, the UE updates the activation set of the UE accordingly: deleting the UE access device that is no longer in wireless connection with the UE. logo.
- the UE may eventually maintain a wireless connection with only one UE access device that can receive the strongest pilot signal, and at this time, only one UE is saved in the active set of the UE.
- the wireless channel of the access device that is, the wireless link in which only one UE access device exists in the active set.
- the radio interface protocol stack drop request is sent to the UE access device, and the radio interface protocol stack drop request includes the protocol.
- the stack migration decision point is configured for the configuration information included in the radio interface protocol stack instance established by the UE, such as: data transmission format, data transmission rate, and whether the data transmission error is retransmitted or the like.
- the UE access device After receiving the radio interface protocol stack drop request, the UE access device establishes an instance of the radio interface protocol stack for the UE according to the configuration information included in the request, so as to ensure that the subsequent communication operations of the UE can be processed normally. . At the same time, the UE access device sends a radio interface protocol stack down response to the protocol stack migration decision point. After receiving the downlink response of the radio interface protocol stack, the protocol stack migration decision point deletes the radio interface protocol stack instance that it has established for the UE.
- the UE only keeps connected with the source UE access device through a wireless link.
- the UE performs softer handover across sectors within the signal coverage of the source UE access device, the UE remains connected to the source UE access device through multiple wireless links.
- the switching method is compared with the switching method shown in FIG. Some differences. The difference is: when the source UE access device establishes a transmission link with the protocol stack migration decision point; and the target UE access device establishes a radio link with the UE, and after establishing a transmission link with the protocol stack migration decision point
- the source UE access device first receives the wireless signals sent from the UE through multiple wireless links connected to the UE, and performs softer combing on the wireless signals.
- the target UE access device maintains the wireless with the UE through multiple wireless links. connection. Then, when the source UE access device establishes a transmission link with the protocol stack migration decision point; and the target UE access device establishes a radio link with the UE, and after establishing a transmission link with the protocol stack migration decision point, the target UE The access device also first receives the wireless signals sent from the UE through multiple wireless links connected to the UE, and then performs soft combing on the wireless signals.
- the source and/or target UE access device may not perform soft combing on the received UE wireless signals of multiple radio links, but separately send the UE radio signals to the protocol stack migration decision point, by the protocol stack.
- the migration decision point directly performs subsequent signal processing such as MDC operation on all the received UE wireless signals.
- the specific signaling procedure is the same as that of the signaling process described in FIG. 5, and details are not described herein again.
- Step 901 The source UE access device sends a radio interface protocol stack upload request corresponding to the UE to the protocol stack migration decision point.
- Step 902 After receiving the uplink request of the radio interface protocol stack, the protocol stack migration decision point establishes an instance of the radio interface protocol stack for the UE, and sends a radio interface protocol stack uplink response to the source UE access device.
- Step 903 After receiving the uplink response of the radio interface protocol stack, the source UE access device deletes the radio interface protocol stack instance that it has established for the UE.
- the target UE access device establishes a radio connection with the UE, and establishes and protocols.
- the transmission link between the stack migration decision points, the source UE accesses the transmission link between itself and the protocol stack migration decision point.
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CNB2004100916103A CN100389632C (zh) | 2004-11-24 | 2004-11-24 | 一种无线接入网络系统及其实现的软切换方法 |
CN200410091610.3 | 2004-11-24 |
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CN101374325B (zh) * | 2007-08-23 | 2012-04-04 | 电信科学技术研究院 | 一种移动终端实现小区切换的方法和系统 |
CN100562176C (zh) * | 2007-11-13 | 2009-11-18 | 北京北方烽火科技有限公司 | 一种利用mimo技术移动台主导移动通信系统中切换方法 |
CN104349451B (zh) * | 2013-08-09 | 2019-03-22 | 电信科学技术研究院 | 一种进行同步的方法和设备 |
CN113016211A (zh) * | 2018-11-27 | 2021-06-22 | Oppo广东移动通信有限公司 | 无线通信方法、终端设备和网络设备 |
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US20020045447A1 (en) * | 1999-01-25 | 2002-04-18 | Juha Rasanen | Interworking between radio access networks |
CN1416284A (zh) * | 2001-10-26 | 2003-05-07 | 三星电子株式会社 | 实现越区切换的移动通信系统和方法 |
CN1540999A (zh) * | 2003-04-24 | 2004-10-27 | 普天信息技术研究院 | 一种无线接入网络的接入方法及系统 |
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US20020045447A1 (en) * | 1999-01-25 | 2002-04-18 | Juha Rasanen | Interworking between radio access networks |
CN1416284A (zh) * | 2001-10-26 | 2003-05-07 | 三星电子株式会社 | 实现越区切换的移动通信系统和方法 |
CN1540999A (zh) * | 2003-04-24 | 2004-10-27 | 普天信息技术研究院 | 一种无线接入网络的接入方法及系统 |
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CN101742553B (zh) * | 2008-11-04 | 2012-08-29 | 上海华为技术有限公司 | 一种服务小区切换中的处理方法及装置 |
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