WO2015168916A1 - 一种小区切换的方法、装置及系统 - Google Patents
一种小区切换的方法、装置及系统 Download PDFInfo
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- WO2015168916A1 WO2015168916A1 PCT/CN2014/077077 CN2014077077W WO2015168916A1 WO 2015168916 A1 WO2015168916 A1 WO 2015168916A1 CN 2014077077 W CN2014077077 W CN 2014077077W WO 2015168916 A1 WO2015168916 A1 WO 2015168916A1
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- uplink
- serving cell
- cell
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- downlink
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- 238000000034 method Methods 0.000 title claims abstract description 127
- 230000006870 function Effects 0.000 claims description 38
- 230000004913 activation Effects 0.000 claims description 33
- 230000015654 memory Effects 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000011022 operating instruction Methods 0.000 claims 3
- 238000001514 detection method Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 71
- 230000011664 signaling Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 14
- 230000004044 response Effects 0.000 description 12
- 230000003993 interaction Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000004590 computer program Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- 241000208140 Acer Species 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/249—Reselection being triggered by specific parameters according to timing information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for cell handover. Background technique
- the micro cell base station corresponding to the micro cell may be a home base station, or a pico base station (English: Pico), a micro base station (English: Micro), or a micro base station (English: Low Power Node, referred to as LPN).
- the following uses the micro cell base station to express such a base station, and its gateway, such as a gateway of a home base station, is collectively referred to as a base station gateway.
- FIG. 1 is a schematic diagram of a deployment structure of a micro cell and a macro cell in the prior art.
- a micro cell Pico and a macro cell Node B share a radio network controller (English: Radio Network Controller, RNC for short).
- the micro cell base station has the function similar to the macro cell base station, and the micro cell base station directly interacts with the RNC through the logical interface Iub.
- the micro-cells and the macro-cells can be deployed in the same frequency as the macro-frequency network.
- the user equipment English: User Equipment, UE for short
- the power control process will gradually reduce the uplink transmit power of the UE. This will cause the macro base station to fail to receive the uplink signal of the UE, including the uplink scheduling information.
- the macro cell serves as the serving cell of the UE, namely: Enhanced Dedicated Transport Channel (English: Enhanced Dedicated Transport Channel, E-DCH for short).
- the cell and the service high speed downlink shared channel (English: High speed Downlink Shared Channel, referred to as HS- The DSCH) cell must be the same cell, and the determination of the serving cell is based on the downlink signal measured by the UE.
- the macro cell since the downlink cell signal quality of the macro cell is still better than the micro cell, the macro cell is still the serving cell, and the macro base station cannot receive or The uplink signal sent by the UE cannot be correctly demodulated, and the macro base station cannot correctly implement the pair according to the scheduling information of the UE.
- UE uplink data scheduling, and the macro base station cannot implement scheduling for the UE.
- FIG. 2 is an execution flow when the UE moves from the micro cell to the macro cell.
- the UE's uplink serving cell and the downlink are performed.
- the service cells are all LPNs, and the specific steps are as follows:
- the UE reports to the RNC that the macro cell exceeds a threshold (event 1A).
- the RNC sends a radio link setup request carrying the pre-configured parameter to the macro-base station MacroNodeB, where the pre-configuration parameter includes a configuration parameter of the serving E-DCH cell and a downlink configuration parameter of the serving HS-DSCH cell, or The uplink E-DCH link parameters and the downlink HS-DSCH link parameters;
- the MacroNodeB returns a radio link setup response to the RNC.
- the RNC sends an activation set update message to the UE, where the active set update message is used to indicate that the UE waits for the serving cell handover, and the pre-configuration parameter for the UE to perform uplink and reconfiguration is carried in the active set update message.
- the UE returns an active set update response to the RNC.
- the UE reports the current signal to the RNC, and the best cell changes (Event 1D), that is, the signal of the macro cell is better than the cell;
- the RNC sends a radio link reconfiguration preparation request to the MacroNodeB.
- the MacroNodeB sends a radio link reconfiguration response to the RNC.
- the RNC sends a radio link reconfiguration preparation request to the LPN.
- the LPN sends a radio link reconfiguration response to the RNC.
- the RNC sends a radio link reconfiguration confirmation message to the LPN and to the MacroNodeB.
- the MacroNodeB sends a high speed shared control channel (English: High Speed Shared Control Channel, HS-SCCH) command to the UE, where the HS-SCCH command is used to instruct the UE to configure a corresponding link according to the pre-configured parameter to implement uplink and downlink.
- Serving cell handover In this case, the LPN may send a reconfiguration message to the UE to trigger the UE to perform uplink and downlink serving cell handover.
- the UE configures an HS-DSCH link configuration parameter, and switches the serving E-DCH cell and the serving HS-DSCH cell to the MacroNodeB, and the UE sends a reconfiguration complete message to the RNC.
- the foregoing S01 to S13 describe the process of the UE switching to the MacroNodeB in the uplink and downlink serving cell. After the handover is completed, in order to avoid the problem that the MacroNodeB cannot receive the uplink data of the UE, the decoupling of the uplink and downlink serving cells is also required. The specific process is as follows:
- Step S07 to S11 is repeated, and then S14 is executed.
- the difference is that the previous steps S07 to S11 configure the MacroNodeB as an uplink and downlink serving cell, and the link also becomes a serving HS-DSCH link and a service E-DCH link.
- the LPN cell is configured as a non-serving cell, and the corresponding link is a non-serving E-DCH link. Since there is only one HS-DSCH link, the LPN does not have an HS-DSCH link at this time.
- the MacroNodeB is configured as a downlink serving cell and a non-uplink serving cell, and the LPN is configured as an uplink serving cell. ;
- the MacroNodeB sends a reconfiguration command to the UE, where the reconfiguration command carries an uplink configuration parameter configured to the E-DCH link.
- the UE reconfigures the E-DCH link according to the uplink configuration parameter in the reconfiguration command, so that the serving E-DCH cell of the UE is an LPN.
- the uplink and downlink cell decoupling is completed, that is, the serving E-DCH cell is an LPN, and the serving HS-DSCH cell is a MacroNodeB.
- the invention provides a method, a device and a system for cell handover, which are used to solve the problem that the decoupling process is complicated, and the configuration parameters are repeatedly transmitted, and the signaling overhead is also increased, resulting in waste of resources.
- the first aspect of the present invention provides a method for cell handover, including:
- the first operation indication is used to indicate that only the uplink serving cell handover is performed, obtaining configuration parameters of the uplink enhanced dedicated transport channel E-DCH link in the pre-configured parameter, and according to the uplink E-DCH
- the configuration parameters of the link switch the uplink serving cell from the serving cell to the target cell.
- the receiving radio network controller RNC sends the first operation indication and the pre-configuration parameters, including:
- the first operation indication and the pre-configuration parameter are obtained in the activation set update message, where the downlink high-speed physical downlink sharing is configured in the pre-configuration parameter.
- the method when only the uplink serving cell is switched, according to the configuration parameter of the uplink E-DCH link After the uplink serving cell is switched from the serving cell to the target cell, the method further includes:
- the downlink serving cell is switched to the target cell according to the received first operation indication and the configuration parameter of the downlink HS-DSCH link included in the pre-configuration parameter, and the configuration parameter of the uplink E-DCH link remains unchanged.
- the method when only the downlink serving cell is switched, according to the configuration parameter of the downlink HS-DSCH link After the downlink serving cell is switched from the serving cell to the target cell, the method further includes:
- the configuration parameter of the uplink E-DCH link carried in the reconfiguration message is the same as the configuration parameter of the uplink E-DCH link in the pre-configuration parameter, according to the second operation indication and the reconfiguration message Determining, by the configuration parameter of the uplink E-DCH link, the uplink serving cell to the target cell;
- the uplink serving cell is switched to the target cell according to the uplink E-DCH link parameter in the pre-configured parameter.
- the method Before receiving the first operation indication sent by the radio network controller RNC and the pre-configured parameters, the method further includes:
- the capability of the uplink and downlink serving cell decoupling is enhanced, and the enhanced uplink and downlink serving cell decoupling capability is characterized by combining the user equipment supporting serving cell switching function and the uplink and downlink service area decoupling function.
- a second aspect of the present invention provides a method for controlling cell handover, including:
- Detecting whether the user equipment is reported to support the enhanced uplink and downlink serving cell decoupling, and the enhanced uplink and downlink serving cell decoupling characterizes that the user equipment supports the serving cell handover function and the uplink and downlink serving cell decoupling functions.
- a third aspect of the present invention provides a method for indicating a cell, which includes: acquiring an uplink serving cell indication on a secondary carrier frequency sent by a radio network controller RNC; and the uplink serving cell indication includes a secondary carrier frequency a combination of the identifier of the uplink service link, the scrambling code of the uplink serving cell of the secondary carrier frequency, the configuration information of the primary carrier frequency and the cell timing reference on the secondary carrier frequency, or a combination of multiple information;
- the uplink serving cell indicates the identifier of the uplink serving link that includes the secondary carrier frequency, determining that the link indicated by the identifier of the uplink serving link is an uplink serving link of the secondary carrier frequency;
- the link that includes the scrambling code of the uplink serving cell is determined to be the uplink serving link of the secondary carrier frequency.
- a fourth aspect of the present invention provides a device for cell handover, including: a receiving module, configured to receive a first operation indication and a pre-configuration parameter sent by a radio network controller RNC;
- a switching module configured to: when the first operation indication is used to indicate that only downlink serving cell handover is performed, obtain configuration parameters of a downlink high-speed physical downlink shared channel HS-DSCH link in the pre-configuration parameter, according to the The configuration parameter of the downlink HS-DSCH link is that the downlink serving cell is switched from the serving cell to the target cell, and the uplink serving cell is kept in the serving cell; or, when the first operation indication is used to indicate that only the uplink serving cell is performed And performing, in the pre-configuration parameter, obtaining configuration parameters of an uplink enhanced dedicated transport channel E-DCH link, and switching the uplink serving cell from the serving cell to the target according to the configuration parameter of the uplink E-DCH link Community.
- the receiving module is specifically configured to: when receiving an activation set update message sent by an RNC, obtain the a first operation indication and the pre-configuration parameter, where configuration parameters of a downlink high-speed physical downlink shared channel HS-DSCH link and/or configuration of an uplink enhanced dedicated transport channel E-DCH link are configured in the pre-configuration parameter parameter.
- the receiving module is further configured to receive a target base station corresponding to the target cell or send an indication by the RNC to indicate the user
- the device performs a handover instruction or message for serving the cell handover;
- the switching module is further configured to switch the downlink serving cell to the target cell according to the received first operation indication and the configuration parameter of the downlink HS-DSCH link included in the pre-configuration parameter, and the uplink E-DCH link
- the configuration parameters remain the same.
- the receiving module is further configured to receive a reconfiguration message sent by the RNC;
- the switching module is further configured to: in the reconfiguration message, obtain a second operation indication to indicate that the uplink serving cell is switched to the target cell; and configure the uplink E-DCH link that is carried in the reconfiguration message
- the uplink is performed according to the second operation indication and the configuration parameter of the uplink E-DCH link in the reconfiguration message
- the serving cell is handed over to the target cell; or, if the reconfiguration message does not carry the configuration parameter of the uplink E-DCH link, the uplink is determined according to the uplink E-DCH link parameter in the pre-configured parameter.
- the serving cell switches to the target cell.
- a fourth possible implementation manner Also includes:
- the reporting module is configured to report the capability of the uplink and downlink serving cell decoupling to support the RNC, and the enhanced uplink and downlink serving cell decoupling capability is characterized by combining the user equipment supporting serving cell handover function and the uplink and downlink serving cell decoupling function .
- a fifth aspect of the present invention provides an apparatus for controlling cell handover, including: And a generating module, configured to: when receiving, by the user equipment, a first triggering event that is used to indicate that the user equipment is to be moved from the serving cell to the target cell, to generate, to instruct the user equipment to switch the uplink serving cell or the downlink serving cell to a first operation indication of the target cell;
- a determining module configured to determine a pre-configured parameter for configuring a downlink high-speed physical downlink shared channel HS-DSCH link and/or an uplink enhanced dedicated transport channel E-DCH link of the user equipment;
- the first operation indication and the pre-configuration parameter are sent to the user equipment, so that the user equipment switches the downlink serving cell or the uplink serving cell to the location according to the first operation indication and the pre-configuration parameter.
- the target cell configured to determine a pre-configured parameter for configuring a downlink high-speed physical downlink shared channel HS-DSCH link and/or an uplink enhanced dedicated transport channel E-DCH link of the user equipment.
- the method further includes:
- the detecting module is configured to detect whether the user equipment is reported to support the enhanced uplink and downlink serving cell decoupling, and the enhanced uplink and downlink serving cell decoupling characterizes the user equipment to support the serving cell handover function and the uplink and downlink serving cell solution Coupled function.
- a sixth aspect of the present invention provides a device for cell handover, including:
- An obtaining module configured to obtain an uplink serving cell indication sent by the radio network controller RNC, and a determining module, configured to determine, according to the uplink serving cell indication, an uplink serving cell or an uplink serving link.
- a seventh aspect of the present invention provides an apparatus, comprising: one or more processors, a memory, and one or more programs; the one or more programs are stored in the memory, and The one or more processors invoke and execute the one or more programs from the memory; the one or more programs are configured to perform the following steps:
- the first operation indication is used to indicate that only the uplink serving cell handover is performed, acquiring configuration parameters of the uplink enhanced dedicated transport channel E-DCH link in the pre-configuration parameter, and according to The configuration parameter of the uplink E-DCH link switches the uplink serving cell from a serving cell to a target cell.
- the one or more programs are further configured to perform the steps:
- the first operation indication and the pre-configuration parameter are obtained in the activation set update message, where the downlink high-speed physical downlink sharing is configured in the pre-configuration parameter.
- the one or more programs are further configured to perform the steps:
- the downlink serving cell is switched to the target cell according to the received first operation indication and the configuration parameter of the downlink HS-DSCH link included in the pre-configuration parameter, and the configuration parameter of the uplink E-DCH link remains unchanged.
- the one or more programs are further configured to perform the steps:
- the configuration parameter of the uplink E-DCH link carried in the reconfiguration message is the same as the configuration parameter of the uplink E-DCH link in the pre-configuration parameter, according to the second operation indication and the reconfiguration message Determining, by the configuration parameter of the uplink E-DCH link, the uplink serving cell to the target cell;
- the uplink serving cell is switched to the target cell according to the uplink E-DCH link parameter in the pre-configured parameter.
- the capability of the uplink and downlink serving cell decoupling is enhanced, and the enhanced uplink and downlink serving cell decoupling capability is characterized by combining the user equipment supporting serving cell switching function and the uplink and downlink service area decoupling function.
- An eighth aspect of the present invention provides a radio network controller including one or more processors, a memory, and one or more programs; the one or more programs are stored in the memory, and by the one Or a plurality of processors invoking and executing the one or more programs from the memory; the one or more programs being configured to perform the following steps:
- the one or more programs are further configured to perform the steps:
- Detecting whether the user equipment is reported to support the enhanced uplink and downlink serving cell decoupling, and the enhanced uplink and downlink serving cell decoupling characterizes that the user equipment supports the serving cell handover function and the uplink and downlink serving cell decoupling functions.
- a method for cell handover is provided in the embodiment of the present invention, in which: receiving a first operation indication and a pre-configuration parameter sent by an RNC; and if the first operation indication is used to indicate a downlink serving cell handover, according to the downlink HS-DSCH The configuration parameter of the link switches the downlink serving cell from the serving cell to the target cell, and the uplink serving cell remains unchanged; if the first operation indication is used to indicate that only the uplink service is performed The cell handover is performed, and the uplink serving cell is switched from the serving cell to the target cell according to the configuration parameter of the uplink E-DCH link.
- the method can complete the cell decoupling in the process of completing the cell handover, and avoids the cumbersome process of the UE decoupling after the uplink and downlink serving cells are simultaneously switched to the target cell, thereby improving the efficiency of the decoupling of the serving cell.
- the signaling overhead caused by repeated transmission configuration parameters is avoided, and system resources are saved.
- FIG. 1 is a schematic structural diagram of a network architecture in the prior art
- FIG. 2 is a flow chart of a method for cell handover and cell decoupling in the prior art
- FIG. 3 is a schematic structural diagram of another network architecture in the prior art
- FIG. 5 is a flowchart of a cell handover method according to an embodiment of the present invention.
- FIG. 6 is an interaction flowchart of a d and area switching method according to an embodiment of the present invention.
- FIG. 7 is a flowchart of interaction of a cell decoupling according to an embodiment of the present invention.
- FIG. 8 is a flowchart of a method for controlling cell handover according to an embodiment of the present invention.
- FIG. 9 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present invention.
- FIG. 10 is a schematic structural diagram of another cell switching apparatus according to an embodiment of the present invention.
- FIG. 11 is a schematic structural diagram of a control cell handover apparatus according to an embodiment of the present invention
- FIG. 12 is a schematic structural diagram of another control cell handover apparatus according to an embodiment of the present invention. detailed description
- the cell handover method in the embodiment of the present invention can be applied to at least the following three network architectures:
- FIG. 1 shows a network architecture between a micro cell Pico and a macro cell NodeB.
- the network architecture shown in FIG. 1 will not be described again.
- FIG. 3 shows another network architecture of a micro cell and a macro cell.
- the micro base station in the micro cell has a separate RNC management, and the RNC and the macro RNC of the management micro base station pass the existing The logical interface lur is connected, and the micro base station is connected to the RNC through lub.
- the information between the micro-area and the RNC in the network architecture of FIG. 1 and FIG. 3 is based on the Iub interface communication.
- the micro base station implements the functions of the radio network controller and the base station network, and the base station network functions as a sinking function.
- the micro base station is connected to the base station network through the Iuh or Iurh interface, and is connected to the RNC through the lur interface.
- the interaction information between the micro base station and the RNC needs to be forwarded through the base station network.
- the method provided by the embodiment of the present invention is applicable to the foregoing three network architectures.
- the network architecture shown in FIG. 1 is a basic network architecture, and the network architectures shown in FIG. 3 and FIG. 4 are the evolution architecture of FIG. 1, so
- the network architecture shown in FIG. 1 is applicable to the network architecture shown in FIG. 3 and FIG. 4, so in the following embodiments, the network architecture shown in FIG. 1 is described.
- the embodiment of the present invention provides a method, device, and system for cell handover, that is, receiving the first operation sent by the RNC.
- the pre-configured parameter if the first operation indication is used to indicate the downlink serving cell handover, the downlink serving cell is switched from the serving cell to the target cell according to the configuration parameter of the downlink HS-DSCH link, and the uplink serving cell remains unchanged;
- An operation indication is used to indicate that only the uplink serving cell handover is performed, and the uplink serving cell is switched from the serving cell to the target cell according to the configuration parameter of the uplink E-DCH link, so that the cell solution is completed in the process of completing the cell handover.
- Coupling avoids the cumbersome process of the UE decoupling after the uplink and downlink serving cells are simultaneously switched to the target cell, improves the efficiency of decoupling of the serving cell, and avoids the signaling overhead caused by repeated transmission configuration parameters, thereby saving system resource.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- FIG. 5 is a flowchart of a method for cell handover according to an embodiment of the present invention.
- the method includes: S501: Receive a first operation indication and a pre-configuration parameter sent by a radio network controller RNC, where the first operation indication is used to indicate When the downlink serving cell is switched, S502 is performed, and if the first operation indication is used to indicate the uplink serving cell handover, S503 is performed; S502: Obtain a configuration parameter of a downlink high-speed physical downlink shared channel HS-DSCH link in the pre-configuration parameter, and switch the downlink serving cell from the serving cell to the target cell according to the configuration parameter of the downlink HS-DSCH link, and the uplink serving cell maintains In the service area;
- the mobile cell may move from the micro cell to the micro cell.
- the method provided by the embodiment of the present invention is applicable to both cases.
- Case 1 The UE moves from the micro cell to the macro cell, where the target cell is a macro cell and the service cell is a micro cell.
- the UE When the UE moves from the micro cell to the macro cell, the UE reports the 1A event to the RNC. At this time, the RNC determines that the UE needs to establish a link in the macro cell, and the RNC sends a link establishment request message to the macro cell, where The link setup request message carries the pre-configured parameters for the subsequent handover and the parameters of the currently established link (established as a non-serving E-DCH link).
- the link establishment request message carries a first operation indication, where the first operation indication is used to indicate that the subsequent handover is to switch only the uplink serving cell, or only the downlink serving cell or the uplink and downlink serving cell is simultaneously configured according to the pre-configuration.
- Parameter switching wherein the first operation indication may be included in a radio link setup request or a radio link addition or a synchronous radio link reconfiguration request or an asynchronous radio link reconfiguration request message.
- the RNC When the RNC receives the response message indicating that the link establishment is completed, the RNC sends an activation set update message to the UE, where the activation set update message carries the first operation indication and the pre-configuration parameter, the first The operation indication is used to indicate that the UE performs the uplink serving cell handover or only the downlink serving cell handover, or the upper and lower serving cell handover according to the pre-configuration parameters, and then the fast serving cell handover is performed in the embodiment of the present invention. Cell handover.
- the pre-configuration parameter is also included in the activation set update message, where the pre-configuration parameters include configuration parameters for the UE to configure the HS-DSCH link and/or the E-DCH link, specifically, in the cell.
- the handover process mainly involves the handover of the downlink serving cell. Therefore, the configuration parameters of the HS-DSCH link must be configured in the pre-configuration parameters, and the configuration parameters of the E-DCH link can be selectively configured.
- the pre-configured parameter may only carry the configuration parameter of the HS-DSCH link, and does not carry the configuration parameter of the E-DCH link.
- the configuration parameter of the HS-DSCH link may be the serving HS-DSCH cell information, including: HARQ related information, primary scrambling code, and downlink high speed physical downlink shared channel (English: High Speed Physical Downlink Shared Channel, referred to as : HS-PDSCH ) Information, service cell change message type, information such as one or more combinations.
- the configuration parameters of the E-DCH link may include primary scrambling code information, absolute grant channel E-AGCH information, power offset information of the E-DCH dedicated physical control channel E-DPCCH, scheduling information power offset, and relative grant channel E. - One or more combined information such as RGCH information.
- the UE After the UE obtains the active set update message, the UE will report the activation set update completion message to the RNC. Since the cell handover has not been performed at this time, the UE will temporarily not use the first operation indication and the pre-configuration parameters.
- the UE When the UE detects that the signal quality of the macro cell becomes the best cell, that is, the UE detects that the signal quality of the macro base station is good enough, the UE reports the triggering 1D event of the cell handover to the RNC, and the RNC will send the chain to the macro base station.
- the route reconfiguration message, and the RNC also sends a link reconfiguration message to the micro base station, and the link reconfiguration message sent by the RNC to the macro base station is used to indicate that the macro base station configures the HS-DSCH link with the UE, and
- the link reconfiguration message sent by the RNC to the micro base station is used to indicate that the micro base station interrupts the HS-DSCH link with the UE.
- the macro base station and the micro base station may perform link reconfiguration according to the first operation indication and the pre-configuration parameter received before, so that corresponding HS-DSCH link parameters and corresponding parameters may not be carried in the reconfiguration process. Instructing the micro base station to interrupt the HS-DSCH link with the UE.
- both the macro base station and the micro base station return an acknowledgement message to the RNC, so that the reconfiguration process of the macro base station and the micro base station is completed.
- the macro base station sends a high speed shared control channel indication (English: High Speed Shared Control Channel order, HS-SCCH order) to the UE, where the indication is used to indicate that the UE performs cell handover, and the UE is receiving.
- a high speed shared control channel indication (English: High Speed Shared Control Channel order, HS-SCCH order)
- the UE After the HS-SCCH indication, the UE will retrieve the first operation indication received from the RNC in advance, and according to the first operation indication, the first operation indication is used to indicate that the UE only switches the downlink serving cell, and reserves the uplink E- The DCH link parameter, when the UE determines that the downlink serving cell needs to be handed over, the UE also retrieves the pre-configured parameters received from the RNC, and obtains configuration parameters for configuring the downlink HS-DSCH link from the pre-configured parameters.
- the UE Based on the configuration parameters of the HS-DSCH link, the UE reconfigures the HS-DSCH link so that the link between the UE and the macro base station is consistent, and then the UE switches the downlink serving cell to the macro cell corresponding to the macro base station, that is, the macro.
- the cell serves as the downlink serving cell of the UE.
- the micro cell still serves as the uplink serving cell of the UE, and the configurations of the corresponding uplink serving cell and all related uplink links are unchanged.
- the UE completes the cell handover and completes the decoupling of the uplink and downlink serving cells, that is, the uplink serving cell remains in the micro cell, and the downlink serving cell switches to the macro cell, thus avoiding going up and down.
- the cumbersome process of decoupling after the serving cell is switched to the target cell at the same time, and the information exchange between the RNC and the macro base station, the micro base station, and the UE is also reduced, thereby saving network resources.
- the technical solution of the present invention is further illustrated by the signaling interaction process between the RNC and the macro base station, the micro base station, and the UE, as shown in FIG.
- the flow shown in FIG. 6 is an information exchange process between the UE, the LPN, and the macro base station Macro NodeB when the UE moves from the micro cell to the macro cell, and the information interaction process includes the following steps:
- the UE reports, to the RNC, a 1A event that the downlink cell signal quality of the macro cell exceeds a certain threshold;
- the UE After the RNC indicates that the Macro NodeB completes the link establishment, the UE receives the active set update message sent by the RNC, where the active set update message carries a first operation indication for instructing the UE to perform cell handover, and is used for Configuring pre-configured parameters of the uplink and/or downlink serving cell;
- the UE returns an active set update complete message to the RNC.
- the RNC instructs the LPN and the Macro NodeB to complete the link reconfiguration
- the UE receives the HS-SCCH indication sent by the Macro NodeB, and the HS-SCCH triggers the UE to perform cell handover.
- the UE will retrieve the first operation indication and the pre-configuration parameters received from the RNC, and the UE will switch the downlink serving cell to the Macro NodeB according to the first operation indication and the pre-configuration parameter, and the uplink serving cell is still the LPN.
- the UE sends a message that the cell handover is completed to the RNC.
- the UE is used as the execution entity to describe the cell decoupling performed at the same time as the UE performs the cell handover, so that the de-coupling of the uplink and downlink serving cells of the UE is more convenient, and the decoupling efficiency of the cell is improved.
- the UE before the step S501, the UE further reports whether the capability of enhancing uplink and downlink serving cell decoupling is supported, or is called "fast decoupling uplink and downlink serving cell", and the enhanced uplink and downlink serving cell solution
- the capability of the coupling indicates that the UE supports the uplink and downlink serving cell separation in the handover procedure. If the UE supports the enhanced uplink and downlink serving cell decoupling capability, the UE also reports to the radio network controller RNC to support the enhanced uplink and downlink serving cell decoupling capability. The message is used by the RNC to determine whether the UE performs the downlink serving cell handover and the uplink and downlink serving cell decoupling according to the message reported by the UE.
- the capability information can establish radio resource control in the UE (English: Radio Resource Control, referred to as: RRC) is reported to the RNC when connected.
- RRC Radio Resource Control
- the RNC is prevented from performing an enhanced handover procedure configuration on the UE that does not support the capability of enhancing uplink and downlink serving cell decoupling, resulting in an error in UE switching.
- the uplink serving cell is kept unchanged, that is, after the uplink and downlink serving cell is decoupled, if the network side triggers to switch the uplink serving cell.
- the corresponding reconfiguration message such as a radio bearer reconfiguration message or a transport channel reconfiguration message or a physical channel reconfiguration message or a radio link reconfiguration request message, may be carried to indicate that the UE will perform the uplink service.
- the UE obtains a second operation indication in the reconfiguration message.
- the second operation indication indicates that only the uplink serving cell of the UE is switched.
- the UE acquires the configuration parameter of the E-DCH link, and finally, according to the second operation indication, the UE performs the uplink according to the pre-configured parameter.
- the configuration parameters of the E-DCH link reconfigure the E-DCH link to switch the uplink serving cell to the macro cell. In this way, the RNC does not need to carry the same E-DCH link configuration parameters as the pre-configuration in the corresponding reconfiguration message, which saves signaling overhead.
- Case 2 The UE moves from the macro cell to the micro cell.
- the target cell at this time is a micro cell, and the current cell is a macro cell.
- the process of the first case illustrates the interaction process between the UE and the RNC, the micro base station, and the macro base station when the UE moves from the micro cell to the macro cell.
- the method shown in FIG. 5 can also be applied to the UE from the macro cell.
- the process of moving to a micro cell can also be applied to the UE from the macro cell.
- the cell handover is directly performed, and the downlink serving cell handover and decoupling process is completed, and the UE moves from the macro cell to the micro cell to perform cell decoupling and then perform downlink service.
- Cell handover when the UE moves from the micro cell to the macro cell, the cell handover is directly performed, and the downlink serving cell handover and decoupling process is completed, and the UE moves from the macro cell to the micro cell to perform cell decoupling and then perform downlink service. Cell handover.
- the UE when the UE moves from the macro cell to the micro cell, the UE first performs uplink and downlink serving cell decoupling and then performs downlink serving cell handover.
- the specific process is as follows:
- the UE reports the 1A event of the micro cell to the RNC, and the RNC determines that the link needs to be added to the UE in the micro cell. Therefore, the RNC sends a link setup request message to the micro base station, where the link setup request message is used to indicate the establishment of the micro base station. After the link between the UE and the UE is completed, the macro base station returns a response message of completion of the link establishment to the RNC.
- the RNC can configure the pre-configuration parameters of the micro-base station, and the pre-configuration parameters can include
- the pre-configured parameter may be used for the subsequent uplink/downlink serving cell decoupling process, or the downlink serving cell handover process after the decoupling process, which may be adopted at this time
- the first operation indication is added to indicate that the uplink and downlink serving cell decoupling process after the micro base station or the subsequent downlink serving cell handover process only switches the uplink serving cell, or only switches the downlink serving cell, or simultaneously switches the uplink and downlink services.
- the uplink and downlink serving cell decoupling process may also be performed by using a radio link setup process, where the process may establish a link of the UE in the micro cell as a serving E-DCH link, but not configured.
- the HS-DSCH link parameter may also carry a first operation indication, where the first operation indication is used to indicate that the UE configures the link of the UE in the micro area according to the pre-configuration parameter during the serving cell handover process that is performed later.
- the HS-DSCH link is served, while the parameters of the serving E-DCH link are unchanged.
- the UE will receive an activation set update message that is sent by the RNC, and the activation set update message is used to indicate that the UE determines the condition of the cell handover, and the active set update message further carries the pre-configured parameter and optionally carries the first operation indication, where
- the pre-configuration parameters include configuration parameters for performing uplink E-DCH link configuration and/or configuration parameters for downlink HS-DSCH link configuration, and the first operation indication carried in the active set update message is used to indicate the UE The handover of the uplink serving cell or the handover of the downlink serving cell is performed. After receiving the pre-configuration parameter and the first operation indication, the UE temporarily saves the pre-configuration parameter and the first operation indication.
- the UE After the UE completes the active set update, the UE returns a response message of the active set update to the RNC.
- the RNC sends a link reconfiguration message to the macro base station and the micro base station, and the macro base station and the micro base station perform link reconfiguration according to the link reconfiguration message sent by the RNC, that is, the macro base station and the UE
- the inter-link configuration is called a non-serving E-DCH link, and the link between the micro base station and the UE is configured to serve the E-DCH link.
- the UE's serving E-DCH link and the serving HS-DSCH The link is in a different cell.
- the macro base station and the micro base station After the macro base station and the micro base station complete the link reconfiguration, the macro base station and the micro base station return a response message of the link reconfiguration completion to the RNC, and complete the uplink and downlink serving cells of the UE on the Iub and Iur interfaces. Decoupled configuration.
- the UE After obtaining the response message returned by the macro base station and the micro base station, the UE receives the link reconfiguration message sent by the RNC, where the message carries a first operation indication, where the first operation indication is used to indicate that the UE performs after decoupling.
- the first operation indication is used to indicate that the UE performs after decoupling.
- the serving cell handover procedure only the downlink serving cell is switched, and the E-DCH related link parameters are not changed, and the UE will reconfigure the message according to the link, which includes the new
- the E-DCH link configuration parameter the UE switches the uplink serving cell to the micro cell according to the parameter configuration, and changes the link in the macro cell to the non-serving E-DCH link.
- the uplink serving cell of the UE is correspondingly switched to the micro cell, and the downlink serving cell is also the original macro cell. This completes the decoupling of the uplink and downlink serving cells of the UE.
- the UE reconfigures according to the E-DCH link parameter in the reconfiguration message, and ignores the pre-configuration.
- the UE ignores the relevant E-DCH link parameters in the pre-configuration parameters according to the first operation indication obtained in the reconfiguration message.
- the UE After the UE completes the de-coupling of the uplink and downlink serving cell, if the UE detects that the micro cell is the best cell, the UE reports the trigger event 1D event to trigger the cell handover to the RNC, which is simply that the UE reports the RNC to the downlink service. The cell performs handover.
- the RNC When the RNC receives the triggering event sent by the UE, the RNC sends a link reconfiguration message to the micro base station and the macro base station.
- the link reconfiguration message sent by the RNC to the macro base station is used to indicate that the macro base station interrupts the macro base station.
- the link reconfiguration message sent by the RNC to the micro base station is used to instruct the micro base station to establish an HS-DSCH link with the UE.
- the macro base station and the micro base station may use the HS-DSCH link parameter in the pre-configured parameter according to the first operation indication received before, and may change the macro base station into a non-serving HS-DSCH cell of the UE, and switch the micro base station.
- the HS-DSCH cell is served for the UE, and the configuration parameters of the E-DCH link remain unchanged.
- the execution method of the cell handover is performed according to S501 S502. That is, when the UE detects a handover command for the UE to perform the cell handover, the handover command is an HS-SCCH command sent by the micro-base station, indicating that the UE performs the serving cell handover, or the macro cell can go to the UE.
- the sending reconfiguration request message requires the UE to perform serving cell handover.
- the UE After the UE receives the HS-SCCH command, the UE performs the reconfiguration of the HS-DSCH link according to the stored first operation indication and the configuration parameter of the HS-DSCH link according to the pre-configured parameter, in the HS- After the DSCH link reconfiguration is completed, the downlink serving cell of the UE will switch In the case of the micro cell, the uplink serving cell and the downlink serving cell are both micro cells, so that the downlink serving cell handover is completed, and finally the UE reports the cell handover complete message to the RNC.
- the foregoing operation indication is not carried in the active set update message, but is carried in the RNC to send a link reconfiguration request message to the UE.
- the operation indication may also be optionally carried in the activation set update message.
- the UE will directly perform downlink or uplink serving cell handover according to the first operation indication, and will not reconfigure the E-over in the handover process after the uplink and downlink serving cell decoupling is performed.
- the DCH link parameters not only avoid the complicated processing steps of the cell handover process, but also reduce the overhead of configuration signaling, and improve the efficiency of cell decoupling.
- the RNC may send a first operation indication to the base station and the UE, where it is used to indicate that only the downlink serving cell is switched during the enhanced handover process.
- the pre-configuration parameters include E-DCH link parameters and HS-DSCH link parameters.
- the RNC sends a link reconfiguration message to the UE or the base station again, where the link reconfiguration message carries a second operation indication, where the second operation indication is used to indicate that the UE is in the In the reconfiguration process, only the uplink serving cell is switched, and the E-DCH link is configured by using the configuration parameters of the E-DCH link in the pre-configured parameter, and finally the uplink serving cell is switched to the target cell, so that it is not necessary to
- the reconfiguration message carries the E-DCH link configuration parameter, and only sends an indication, which also saves network overhead and improves cell decoupling efficiency.
- the RNC may send a first operation indication to the base station and the UE, where it is used to indicate that only the uplink serving cell is switched in the process of the uplink and downlink serving cell.
- the pre-configuration parameters include E-DCH link parameters and HS-DSCH link parameters.
- the RNC sends a link reconfiguration message to the UE or the base station again, where the link reconfiguration message carries a second operation indication, where the second operation indication is used to indicate that the UE is in the In the decoupled serving cell handover procedure, only the uplink serving cell is switched, and the E-DCH link is configured using the configuration parameters of the E-DCH link in the pre-configured parameters.
- the line configuration finally switches the uplink serving cell to the target cell, so that it is not necessary to carry the E-DCH link configuration parameter in the reconfiguration message, but only sends an indication, which also saves network overhead and improves the cell. Decoupling efficiency.
- the RNC needs to use the new E-
- the DCH link parameter is configured to the UE and the base station, so that the uplink serving cell is handed over to the target cell, and the downlink serving cell remains in the original cell, and the RNC carries a de-coupling process in the pre-configuration process or reconfiguration for the uplink and downlink serving cell decoupling process.
- An operation indication where the operation indication is used to indicate that the UE performs only downlink serving cell handover, that is, configured in the serving cell handover procedure according to the pre-configuration parameters
- the configuration parameters of the HS-DSCH link configure the relevant link, so that the downlink serving cell of the UE is switched to the target cell, and the uplink serving cell still retains the original configuration, that is, remains in the target cell after being decoupled.
- the UE in order to ensure that the UE can accurately perform the uplink and downlink serving cell decoupling and the serving cell handover process, the UE also reports whether the uplink and downlink serving cell decoupling capability is supported, or is, fast decoupling
- the service cell indicates that the UE supports the separation of the uplink and downlink serving cells in the process of cell handover, and the UE also reports to the radio network controller (English: Radio Network Controller, RNC for short) to support the uplink and downlink serving cell solution.
- RNC Radio Network Controller
- the capability information is transmitted, so that the RNC configures the UE to perform downlink serving cell handover and uplink and downlink serving cell decoupling according to the capability information reported by the UE, and the capability information can establish radio resource control in the UE (English: Radio Resource) Control, Chinese: RRC) is reported to the RNC when the connection is made. This prevents the RNC from performing an enhanced handover procedure configuration for the UE that does not support the capability, resulting in an error in the UE handover.
- radio resource control in the UE (English: Radio Resource) Control, Chinese: RRC) is reported to the RNC when the connection is made.
- the second case is further illustrated by a communication flow chart between the UE and the RNC, LPN, and Macro NodeB:
- the UE reports, to the RNC, an event that the UE moves from the macro cell to the micro cell.
- the UE receives an activation set update message that is sent by the RNC, where the active set update cell carries a first operation indication and a pre-configuration parameter, and the activation set update message is used to instruct the UE to determine a condition of the cell handover, where the first operation indication is used.
- the UE Instructing the UE to switch the uplink serving cell to the micro cell;
- S703 The UE returns a response message that the activation set update is completed to the RNC.
- the UE receives the link reconfiguration message sent by the RNC, where the link reconfiguration message is used to instruct the UE to reconfigure the E-DCH link and switch the cell.
- the UE reconfigures the E-DCH link according to the configuration parameter of the E-DCH link in the pre-configured parameter, and switches the uplink serving cell to the micro cell according to the first operation indication.
- the UE completes the decoupling of the uplink monthly service cell and the downlink monthly service cell.
- the handover of the serving cell is further performed, and the handover process is as follows:
- the UE when the UE detects that the signal quality of the single micro cell is greater than or equal to the threshold, the UE reports a trigger event of the cell handover to the RNC.
- the UE will receive the activation set update message that is sent by the U C again, and the second operation indication is carried in the activation set update message, where the second operation indication is used to instruct the UE to switch the downlink serving cell to the LPN.
- the UE returns a message that the activation set update is completed to the RNC.
- the UE After the RNC indicates that the LPN and the Macro NodeB complete the link reconfiguration again, the UE receives the HS-SCCH indication sent by the LPN, where the HS-SCCH indication is used to indicate that the UE performs the serving cell handover.
- the UE will switch the downlink serving cell to the LPN according to the second operation indication.
- the UE completes the handover process of the serving cell. From the foregoing handover procedure, the UE does not need to switch the uplink serving cell and the downlink serving cell to the micro cell, and then decouples the serving cell, thereby reducing the number of serving cells. The step of decoupling the serving cell further improves the efficiency of decoupling the serving cell.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- FIG. 8 is a flowchart of a cell handover method according to an embodiment of the present invention, where the method includes: After receiving the first trigger event that is sent by the user equipment to indicate that the user equipment moves from the current cell to the target cell, generating, by the user equipment, the uplink serving cell or the downlink serving cell to the target cell An operational indication;
- the first operation indication and the pre-configuration parameter are sent to the user equipment, so that the user equipment switches the downlink serving cell or the uplink serving cell to the target cell according to the first operation indication and the pre-configuration parameter.
- Case 1 The UE moves from the micro cell to the macro cell.
- the target cell is a macro cell
- the current cell is a micro cell.
- the UE reports the event to the RNC, and the RNC determines, according to the event reported by the UE, that the link needs to be added to the target cell for the UE, and the chain is added to the target cell.
- the path may be an E-DCH link or an HS-DSCH link.
- the RNC After determining that the link needs to be added in the macro cell, the RNC sends a link setup request message to the target cell, where the link setup request message carries the pre-configuration parameters for the subsequent handover and the parameters of the currently established link. For example, a so-called non-serving E-DCH link is established.
- the link establishment request message carries a first operation indication, where the first operation indication is used to indicate that the subsequent handover is to switch only the uplink serving cell, or only the downlink serving cell or the uplink and downlink serving cell is simultaneously configured according to the pre-configuration.
- Parameter switching wherein the first operation indication may be included in a radio link setup request or a radio link addition or a synchronous radio link reconfiguration request or an asynchronous radio link reconfiguration request message.
- the reconfiguration parameter including the configuration parameters of the target cell for configuring the E-DCH link and the HS-DSCH link may also be carried in the link setup request message, and the configuration parameter of the macro cell through the E-DCH link may be Configure the E-DCH link with the UE, and configure the HS-DSCH link.
- the parameter can be configured with the HS-DSCH link between the UE, and the macro cell temporarily does not use the reconfiguration parameter, but knows that the reconfiguration parameter is used when the UE needs to perform cell handover.
- the RNC When the RNC receives the message that the macro-base station corresponding to the macro-cell corresponding to the macro-base station is complete, the RNC sends an active set update flow message to the UE, in order to enable the UE to determine whether the serving cell that needs to be handed over is the uplink serving cell or the downlink serving cell. Therefore, the RNC may carry a first operation indication in the activation set update message sent to the UE, where the first operation indication is used to indicate that the UE performs only the uplink serving cell handover or only according to the pre-configuration parameters when the fast serving cell handover is followed. Perform downlink service cell handover, or switch between upper and lower serving cells.
- the active set update message also carries a pre-configuration parameter, where the pre-configuration parameter includes configuration parameters for configuring the UE to configure the HS-DSCH link and/or the E-DCH link, and the first operation is obtained by the UE.
- the UE After indicating and pre-configuring the parameters, the UE temporarily saves the first operation indication and the pre-configuration parameters.
- the UE When the UE detects that the signal quality of the macro cell becomes the best cell, the UE reports the triggering event of the handover cell to the RNC, and the UE informs the RNC that the downlink serving cell needs to be handed over by the triggering event, and the RNC will send the chain to the macro base station.
- the macro base station After the reconfiguration message is received, the macro base station acquires the configuration parameters for configuring the HS-DSCH link with the UE in the reconfiguration parameter, so that the macro base station can be configured with the UE.
- the RNC sends a link reconfiguration message to the micro base station.
- the micro base station After receiving the link reconfiguration message, the micro base station will interrupt the HS-DSCH link with the UE.
- the RNC may selectively send a link reconfiguration command to the UE, where the link reconfiguration command is used to instruct the UE to perform link reconfiguration, that is, the UE configuration and the Acer base.
- the HS-DSCH link between the stations may also choose not to issue the link reconfiguration command.
- the macro base station also performs link reconfiguration when the cell handover indication is sent to the UE.
- the UE when the UE receives the cell handover indication sent by the macro base station, the UE will retrieve the first operation indication received from the RNC in advance, and according to the first operation indication, the first operation indication is used to indicate that the UE only switches.
- the downlink serving cell retains the uplink E-DCH link parameter, and the UE determines that the downlink serving cell needs to be handed over, and the UE also retrieves the pre-configured parameters received from the RNC, and from the pre-configuration Obtaining configuration parameters for configuring the downlink HS-DSCH link, the UE reconfigures the HS-DSCH link based on the configuration parameters of the HS-DSCH link, so that the link between the UE and the macro base station is consistent, and then The UE switches the downlink serving cell to the macro cell corresponding to the macro base station.
- the uplink serving cell remains in the original micro cell, and the configuration of the corresponding uplink serving cell and all related uplink links does not change.
- the UE when the UE moves from the micro cell to the macro cell, the UE does not need to simultaneously switch the uplink serving cell and the downlink serving cell to the macro cell at the same time, and then performs the uplink serving cell. Or the downlink service cell is switched back to the demultiplexing process of the micro cell, and the RNC sends the first operation indication to the UE to indicate whether the UE performs the uplink serving cell handover or the downlink serving cell handover, so that the cell to be switched can be separately used. Switching directly to the target cell avoids the cumbersome process of cell decoupling and improves the efficiency of cell decoupling.
- the RNC determines whether the capability of the uplink and downlink serving cell decoupling supported by the UE is received, or is referred to as “fast decoupling the uplink and downlink serving cell”.
- the ability of the uplink and downlink serving cell to be decoupled indicates that the UE supports the uplink and downlink serving cell separation in the handover procedure. If the UE supports the uplink and downlink serving cell decoupling capability, the UE also reports the uplink and downlink serving cell to the radio network controller RNC.
- the RNC determines whether the UE performs downlink serving cell handover and uplink and downlink serving cell decoupling according to the message reported by the UE, and the capability information can establish radio resource control in the UE (English: Radio Resource Control) , referred to as: RRC) is reported to the RNC when connected.
- RRC Radio Resource Control
- the reconfiguration message may be sent to the UE.
- the second operation indication indicates that only the uplink serving cell of the UE is switched, and the UE obtains the second operation indication in the reconfiguration message.
- the UE acquires the configuration parameter of the E-DCH link, and finally, according to the second operation indication, the UE performs the uplink according to the pre-configured parameter.
- the configuration parameters of the E-DCH link reconfigure the E-DCH link to switch the uplink serving cell to the macro cell. In this way, the RNC does not need to carry the same E-DCH link configuration parameters as the pre-configuration in the corresponding reconfiguration message, which saves signaling overhead.
- Case 2 The UE moves from the macro cell to the micro cell.
- the target cell at this time is a micro cell, and the service cell is a macro cell.
- case 1 only the UE needs to perform a cell handover, and the cell decoupling can be completed at the same time. In case 2, the UE must first perform cell decoupling before the cell handover can be performed.
- the cell de-coupling process is also performed after the UE reports the event of moving from the macro cell to the micro cell.
- the RNC execution process is basically the same as the cell handover process in the first case, but the micro cell does not send the cell handover command to the UE to trigger.
- the UE performs the serving cell handover, but the RNC sends a link reconfiguration message to the UE to trigger the UE to perform the serving cell handover.
- the RNC still sends the first operation indication and the pre-configuration parameters to the UE before the serving cell handover.
- the first operation indication at this time is used to instruct the UE to switch the uplink serving cell to the micro cell, and the downlink serving cell remains unchanged.
- the UE first sends a link setup request message to the micro base station, where the link setup request message is used to indicate that the micro base station establishes a link with the UE, and after the micro base station completes the link establishment with the UE, the macro base station A response message to the completion of the link establishment is returned to the RNC.
- the RNC may configure the micro-base station pre-configuration parameters, and the pre-configuration parameters may include configuration parameters of the HS-DSCH link and/or the E-DCH link, and the pre-configuration parameters may be used later
- the serving cell decoupling process, or the downlink serving cell handover process after the decoupling process may be indicated by the added first operation indication to indicate the uplink and downlink serving cell decoupling process after the micro base station or the subsequent downlink serving cell During the handover process, only the uplink serving cell is switched, or only the downlink serving cell is switched, or the uplink and downlink serving cells are simultaneously switched.
- the RNC After the link configuration is completed, the RNC sends a link reconfiguration message to the UE. After receiving the link reconfiguration message sent by the RNC, the UE will refer to the first operation according to the first operation.
- the configuration parameters of the E-DCH link in the pre-configuration parameters are used to switch the uplink serving cell of the UE to the micro cell, and the downlink serving cell is still a macro cell.
- the UE de-couples the serving cell
- the UE will report the triggering event of the serving cell handover to the RNC, and the RNC sends an activation set update message to the UE.
- the second operation indication is carried in the activation set update message, where the second operation indication is used to instruct the UE to switch the downlink serving cell to the micro cell.
- the RNC When the RNC receives the triggering event reported by the UE, the RNC sends a link reconfiguration message to the micro base station and the macro base station again.
- the reconfiguration message sent to the micro base station is used to indicate the HS between the micro base station configuration and the UE.
- the DSCH link, the reconfiguration message sent to the macro base station is used to indicate that the macro base station interrupts the HS-DSCH link with the UE.
- the micro base station configures the HS-DSCH link with the UE, and the macro base station interrupts the HS-DSCH link with the UE, the micro base station sends an HS-SCCH indication to the UE, the HS-SCCH indication.
- the UE is instructed to perform cell handover, and the UE will switch the downlink serving cell to the micro cell based on the second operation indication. In this way, in the process of the handover, the UE does not need to simultaneously switch the uplink serving cell and the downlink serving cell to the micro cell, and then performs cell decoupling, thereby reducing the step of decoupling the cell and improving the efficiency of cell decoupling.
- Embodiment 3 is a diagrammatic representation of Embodiment 3
- the method in the second embodiment of the present invention can also be applied to the dual-carrier technology.
- the dual-carrier technology means that the UE can perform high-speed uplink packet access on two carrier frequencies (English: High Speed Uplink packet access, referred to as HSUPA).
- the dual-cell E-DCH is also called DC-HSUPA, that is, the UE transmits uplink data on two activated carrier frequencies, one of which is a primary carrier frequency, and the uplink carrier may be included in the primary carrier frequency.
- the carrier frequency English: rimary uplink frequency
- the downlink primary carrier frequency English: rimary downlink frequency
- the UE uplinks the primary carrier frequency for uplink transmission, and the downlink primary carrier frequency for downlink reception.
- the other carrier frequency is a secondary carrier frequency
- the secondary carrier frequency includes an uplink secondary carrier frequency (English: secondary uplink frequency) and a secondary secondary carrier frequency (English: secondary downlink frequency).
- the UE has an uplink serving cell or link and a downlink serving cell on each carrier frequency. Or a link, of course, there are also a number of non-uplink serving cells or links, and the uplink serving cell can schedule data transmission of the UE by transmitting an absolute grant channel E-AGCH.
- the uplink serving cell and the downlink serving cell of the UE are in the same cell, and the RNC configures the uplink configuration parameters of the relevant cell on the carrier frequency of the UE on the Uu interface and For the downlink configuration parameters, the base station related uplink and downlink configuration parameters are configured on the Iub interface RNC.
- the RNC sends a serving E-DCH RL indication uplink serving cell indication to indicate a certain link or a primary common pilot channel (English: Common Pilot Channel)
- the abbreviation: CPICH) information is the service uplink E-DCH link
- the CPICH information may include a primary scrambling code (English: primary scrambling code, referred to as PSC), - one cell has a primary scrambling code, corresponding to the uplink E-DCH
- PSC primary scrambling code
- the cell of the link is the uplink serving cell; the RNC sends the serving HS-DSCH RL indication downlink serving cell indication to indicate that one link is the downlink HS-DSCH link, and the cell corresponding to the downlink HS-DSCH link is the downlink service. Community.
- the RNC Since there is only one downlink serving cell, the RNC does not carry the indication of the uplink serving cell or the uplink E-DCH link on the secondary carrier frequency when the configuration parameter of the uplink E-DCH link on the secondary carrier frequency is sent.
- the configured downlink serving cell or the cell corresponding to the downlink HS-DSCH link is used as the uplink serving cell.
- the uplink serving cells of the two frequency points after decoupling are in the same base station, and one base station can control multiple cells, and the UE can establish multiple links in one base station, so
- the uplink serving cell at the secondary frequency point cannot be instructed to the UE, the base station, and the RNC after decoupling, which causes a configuration error and affects the data transmission of the UE at the secondary frequency point.
- the embodiment of the present invention provides a method for indicating a cell, where the method includes: acquiring an uplink serving cell indication on a secondary carrier frequency sent by a radio network controller RNC; the uplink serving cell indication includes a secondary a combination of an identifier of an uplink serving service link of the carrier frequency, a scrambling code of the uplink serving cell of the secondary carrier frequency, configuration information of the primary carrier frequency and the cell timing reference on the secondary carrier frequency, or a combination of the plurality of information; If the uplink serving cell indicates the identifier of the uplink serving link that includes the secondary carrier frequency, determine that the link indicated by the identifier of the uplink serving link is the uplink serving link of the secondary carrier frequency; or, if the secondary carrier frequency is received, The scrambling code of the serving cell determines that the link containing the scrambling code of the uplink serving cell is the uplink carrier link of the secondary carrier frequency.
- the indication includes an auxiliary frequency point service E-DCH cell or a link indication; or including primary CPICH information or scrambling code information of the cell; or the indication may be a current Some cell E-AGCH information determines which cell or link is an uplink serving cell or an uplink E-DCH link by determining which cell or link is configured with E-AGCH information, that is, no additional addition is needed at this time.
- the indication is implicitly determined by the existing cell; or the UE determines to be the secondary carrier by determining that the timing reference information of the uplink serving cell on the secondary carrier frequency is the same as the timing reference information of the uplink serving cell on the primary carrier frequency.
- the frequency service E-DCH cell, where the timing reference information may be the timing configuration information of the F-DPCH.
- the uplink serving cell indication is carried, so that the UE can determine the uplink serving cell or the uplink serving link on the secondary carrier frequency according to the uplink serving cell indication.
- the uplink serving cell indication may also be carried in related messages on the Iub or Iur interface, where the related message may be: a radio bearer reconfiguration message or a transport channel reconfiguration message or a physical channel reconfiguration message or a radio link. The message is reconfigured with a message such as a request message.
- the RNC can indicate the uplink serving cell or the uplink to the UE and the base station after decoupling, thereby avoiding configuration errors.
- the message sent by the Uu port carries an indication, according to which the uplink serving cell at the secondary frequency or the serving E-DCH link can be determined, thereby making it impossible to determine
- the uplink serving cell at the second frequency point does not affect the data transmission of the UE.
- Embodiment 4 Corresponding to a method for cell handover in the first embodiment, the embodiment of the present invention further provides a device for cell handover, and FIG. 9 is a schematic structural diagram of a device for cell handover according to an embodiment of the present invention.
- the device includes:
- the receiving module 901 is configured to receive a first operation indication and a pre-configuration parameter sent by the radio network controller RNC.
- the switching module 902 is configured to: when the first operation indication is used to indicate that only the downlink serving cell handover is performed, obtain configuration parameters of the downlink high-speed physical downlink shared channel HS-DSCH link in the pre-configuration parameters, and according to the downlink HS-DSCH chain
- the configuration parameter of the path is that the downlink serving cell is switched from the serving cell to the target cell, and the uplink serving cell is kept in the serving cell; or, when the first operation indication is used to indicate that only the uplink serving cell is switched, obtaining the uplink enhancement in the pre-configured parameter Dedicated transport channel
- the configuration parameters of the E-DCH link, and the uplink serving cell is switched from the serving cell to the target cell according to the configuration parameter of the uplink E-DCH link.
- the receiving module 901 is specifically configured to: when receiving the activation set update message sent by the RNC, obtain the first operation indication and the pre-configuration parameter in the activation set update message, where the downlink parameter is configured in the pre-configuration parameter Configuration parameters of the physical downlink shared channel HS-DSCH link and/or configuration parameters of the uplink enhanced dedicated transport channel E-DCH link.
- the receiving module 901 is further configured to receive a target base station corresponding to the target cell or a handover instruction or message sent by the RNC to indicate that the user equipment performs the serving cell handover;
- the switching module 902 is further configured to switch the downlink serving cell to the target cell according to the received first operation indication and the configuration parameter of the downlink HS-DSCH link included in the pre-configuration parameter, and configure the uplink E-DCH link.
- the parameters remain the same.
- the receiving module 901 is further configured to receive a reconfiguration message sent by the RNC.
- the switching module 902 is further configured to: in the reconfiguration message, obtain a second operation indication to indicate that the uplink serving cell is switched to the target cell; and if the configuration parameter of the uplink E-DCH link carried in the reconfiguration message is When the configuration parameters of the uplink E-DCH link in the configuration parameter are the same, the uplink serving cell is switched to the target cell according to the second operation indication and the configuration parameter of the uplink E-DCH link in the reconfiguration message; When the configuration message of the uplink E-DCH link is not carried in the matching message, And switching the uplink serving cell to the target cell according to the uplink E-DCH link parameter in the pre-configured parameter.
- the device may further include:
- the reporting module 1003 (shown in FIG. 10) is configured to report the capability of the uplink and downlink serving cell decoupling to the RNC, and enhance the uplink and downlink serving cell decoupling capability to represent the user equipment supporting the serving cell handover function and the uplink and downlink serving cell decoupling. Functional combination.
- Embodiment 5 is a diagrammatic representation of Embodiment 5:
- an embodiment of the present invention further provides a device for controlling cell switching, as shown in FIG.
- the generating module 1101 is configured to: when receiving the first trigger event reported by the user equipment to identify that the user equipment is to be moved from the serving cell to the target cell, to generate, to indicate that the user equipment switches the uplink serving cell or the downlink serving cell to the target a first operational indication of the cell;
- a determining module 1102 configured to determine a pre-configured parameter for configuring a user equipment downlink high-speed physical downlink shared channel HS-DSCH link and/or an uplink enhanced dedicated transport channel E-DCH link; a sending module 1103, configured to The first operation indication and the pre-configuration parameters are sent to the user equipment, so that the user equipment switches the downlink serving cell or the uplink serving cell to the target cell according to the first operation indication and the pre-configuration parameter.
- the device may further include:
- the detecting module 1201 (shown in FIG. 12) is configured to detect whether the user equipment is reported to support the enhanced uplink and downlink serving cell decoupling, and the enhanced uplink and downlink serving cell decoupling characterizes the user equipment to support the serving cell switching function and uplink and downlink.
- the service cell decoupling function is combined.
- An embodiment of the present invention further provides an apparatus, the apparatus including one or more processors, a memory, and one or more programs; the one or more programs are stored in the memory, and the one is Or a plurality of processors invoking and executing the one or more programs from the memory; the one or more programs being configured to perform the following steps:
- the first operation indication is used to indicate that only the uplink serving cell handover is performed, obtaining configuration parameters of the uplink enhanced dedicated transport channel E-DCH link in the pre-configured parameter, and according to the uplink E-DCH
- the configuration parameters of the link switch the uplink serving cell from the serving cell to the target cell.
- the one or more programs are further configured to perform the steps:
- the first operation indication and the pre-configuration parameter are obtained in the activation set update message, where the downlink high-speed physical downlink sharing is configured in the pre-configuration parameter.
- the one or more programs are further configured to perform the steps:
- the downlink serving cell is switched to the target cell according to the received first operation indication and the configuration parameter of the downlink HS-DSCH link included in the pre-configuration parameter, and the configuration parameter of the uplink E-DCH link remains unchanged.
- the one or more programs are further configured to perform the steps:
- the configuration parameter of the uplink E-DCH link carried in the reconfiguration message is the same as the configuration parameter of the uplink E-DCH link in the pre-configuration parameter, according to the second operation indication and the reconfiguration message Determining, by the configuration parameter of the uplink E-DCH link, the uplink serving cell to the target cell; Or, if the reconfiguration message does not carry the configuration parameter of the uplink E-DCH link, the uplink serving cell is switched to the target cell according to the uplink E-DCH link parameter in the pre-configured parameter.
- the one or more programs are further configured to perform the steps:
- the capability of the uplink and downlink serving cell decoupling is enhanced, and the enhanced uplink and downlink serving cell decoupling capability is characterized by combining the user equipment supporting serving cell switching function and the uplink and downlink service area decoupling function.
- a radio network controller is further provided in the embodiment of the present invention, the radio network controller includes one or more processors, a memory, and one or more programs; the one or more programs are stored in the memory Retrieving and executing the one or more programs from the memory by the one or more processors;
- the one or more programs are configured to perform the following steps:
- the one or more programs are further configured to perform the steps:
- Detecting whether the user equipment is reported to support the enhanced uplink and downlink serving cell decoupling, and the enhanced uplink and downlink serving cell decoupling characterizes that the user equipment supports the serving cell handover function and the uplink and downlink serving cell decoupling functions.
- the present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention.
- the flow chart can be implemented by computer program instructions And/or a combination of the processes and/or blocks in the block diagrams, and the flowcharts and/or blocks in the flowcharts and/or block diagrams.
- These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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PCT/CN2014/077077 WO2015168916A1 (zh) | 2014-05-08 | 2014-05-08 | 一种小区切换的方法、装置及系统 |
CN201480026663.9A CN105264952A (zh) | 2014-05-08 | 2014-05-08 | 一种小区切换的方法、装置及系统 |
EP14891307.2A EP3133862A4 (en) | 2014-05-08 | 2014-05-08 | Cell switching method, device and system |
US15/345,357 US20170055189A1 (en) | 2014-05-08 | 2016-11-07 | Cell handover method and apparatus, and system |
Applications Claiming Priority (1)
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PCT/CN2014/077077 WO2015168916A1 (zh) | 2014-05-08 | 2014-05-08 | 一种小区切换的方法、装置及系统 |
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US15/345,357 Continuation US20170055189A1 (en) | 2014-05-08 | 2016-11-07 | Cell handover method and apparatus, and system |
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WO2015168916A1 true WO2015168916A1 (zh) | 2015-11-12 |
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PCT/CN2014/077077 WO2015168916A1 (zh) | 2014-05-08 | 2014-05-08 | 一种小区切换的方法、装置及系统 |
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EP (1) | EP3133862A4 (zh) |
CN (1) | CN105264952A (zh) |
WO (1) | WO2015168916A1 (zh) |
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MX2016017016A (es) * | 2014-06-20 | 2017-07-07 | Huawei Tech Co Ltd | Método, dispositivo y sistema de generación de comando de control de potencia de transmisión. |
EP3286955A1 (en) * | 2015-04-21 | 2018-02-28 | Nokia Solutions and Networks Oy | Improvements in small cell mobility with dual/multi connectivity |
WO2020164054A1 (zh) * | 2019-02-14 | 2020-08-20 | Oppo广东移动通信有限公司 | 业务处理方法、装置、芯片及计算机程序 |
US11006337B2 (en) * | 2019-04-30 | 2021-05-11 | Charter Communications Operating, Llc | Handoff management in a wireless network environment |
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CN101064561A (zh) * | 2006-04-29 | 2007-10-31 | 华为技术有限公司 | 小区间切换过程中实现上行同步的方法 |
CN101772093A (zh) * | 2008-12-31 | 2010-07-07 | 华为技术有限公司 | 用户上下行不同步切换的方法和装置 |
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US7142861B2 (en) * | 2003-12-12 | 2006-11-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Mobile communications in a hierarchical cell structure |
US7848298B2 (en) * | 2005-03-08 | 2010-12-07 | Qualcomm Incorporated | De-coupling forward and reverse link assignment for multi-carrier wireless communication systems |
ES2377652T3 (es) * | 2005-08-16 | 2012-03-29 | Panasonic Corporation | Método y aparato para configurar nuevamente un número de secuencias de transmisión (NST) |
CN102349342B (zh) * | 2009-03-12 | 2014-02-26 | 交互数字专利控股公司 | 用于选择和重选上行链路主载波的方法和设备 |
CN102714565B (zh) * | 2010-01-08 | 2016-03-02 | Lg电子株式会社 | 在支持多载波的无线通信系统中发送上行链路控制信息的方法和装置 |
US9271203B2 (en) * | 2010-05-25 | 2016-02-23 | Qualcomm Incorporated | Alternate transmission scheme for high speed packet access (HSPA) |
US20140194120A1 (en) * | 2012-08-03 | 2014-07-10 | Telefonakiebolaget L M Ericsson (Publ) | Method and Apparatus for Use in a Mobile Communication Network |
US9609663B2 (en) * | 2012-11-02 | 2017-03-28 | Qualcomm Incorporated | Techniques for decoupling downlink and uplink operations |
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2014
- 2014-05-08 EP EP14891307.2A patent/EP3133862A4/en not_active Withdrawn
- 2014-05-08 CN CN201480026663.9A patent/CN105264952A/zh active Pending
- 2014-05-08 WO PCT/CN2014/077077 patent/WO2015168916A1/zh active Application Filing
-
2016
- 2016-11-07 US US15/345,357 patent/US20170055189A1/en not_active Abandoned
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CN101064561A (zh) * | 2006-04-29 | 2007-10-31 | 华为技术有限公司 | 小区间切换过程中实现上行同步的方法 |
CN101772093A (zh) * | 2008-12-31 | 2010-07-07 | 华为技术有限公司 | 用户上下行不同步切换的方法和装置 |
CN102006639A (zh) * | 2009-09-03 | 2011-04-06 | 华为技术有限公司 | 切换处理方法和系统、中继装置以及基站 |
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US20170055189A1 (en) | 2017-02-23 |
CN105264952A (zh) | 2016-01-20 |
EP3133862A1 (en) | 2017-02-22 |
EP3133862A4 (en) | 2017-05-03 |
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