WO2014019123A1 - 一种无线接入技术间切换方法、相应设备及通信系统 - Google Patents

一种无线接入技术间切换方法、相应设备及通信系统 Download PDF

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Publication number
WO2014019123A1
WO2014019123A1 PCT/CN2012/079357 CN2012079357W WO2014019123A1 WO 2014019123 A1 WO2014019123 A1 WO 2014019123A1 CN 2012079357 W CN2012079357 W CN 2012079357W WO 2014019123 A1 WO2014019123 A1 WO 2014019123A1
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Prior art keywords
node
target
cell
handover
coordination controller
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PCT/CN2012/079357
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English (en)
French (fr)
Inventor
肖登坤
韩静
靳剑东
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201280020860.0A priority Critical patent/CN103828439B/zh
Priority to PCT/CN2012/079357 priority patent/WO2014019123A1/zh
Publication of WO2014019123A1 publication Critical patent/WO2014019123A1/zh
Priority to US14/609,375 priority patent/US10091698B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic
    • 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
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • 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
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method, a corresponding device, and a communication system for switching between wireless access technologies. Background technique
  • 2G (2nd generation) networks such as: GSM, Globe system of mobile communications, enhanced data rate GSM evolution system (EDGE, Enhanced Data Rate for GSM Evolution), 3G (3rd generation) network (eg, Wideband Code Division Multiple Access (WCDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA, Time Division) - Synchronous Code Division Multiple Access ) ), and Long Term Evolution (LTE) will be in a coexistent state to provide users with good communication service quality.
  • GSM Global System of mobile communications
  • EDGE enhanced data rate GSM evolution system
  • 3G (3rd generation) network eg, Wideband Code Division Multiple Access (WCDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA, Time Division) - Synchronous Code Division Multiple Access )
  • LTE Long Term Evolution
  • a user equipment (UE) or a mobile station (MS) may have inter-RAT handover, for example, switching from LTE to a universal mobile communication system (UMTS, Universal Mobile Telecommunications System 0
  • UMTS Universal Mobile Telecommunications System 0
  • FIG. 1A in a multi-standard system, GSM performs large network coverage, and an LTE network is deployed for hotspot coverage, when the UE moves from the edge of Celll to Cell2.
  • the UE performs an inter-RAT handover.
  • the LTE UE is switched to the UMTS as an example.
  • the existing handover procedure is as follows: 2.1) the serving cell configuration measurement configuration is configured to the UE; 2.2) the UE reports the measured measurement result of the neighboring cell to the serving cell; The serving cell performs a handover decision to determine which target cell the UE switches to; 2.4) the monthly service cell sends a handover request to the core network MME (Mobility Management Entity); 2.5) the MME serves the target GPRS support node (SGSN, Serving GPRS Support Node) Forwarding the redirect request; 2.6) the target SGSN sends a redirect request to the radio network controller (RNC); 2.7) the RNC sends a redirect response to the target SGSN; 2.8) the target SGSN forwards the redirect response to the serving MME; 2.9) the serving MME sends a handover request response to the evolved Node B (eNB); 2.10) the serving eNB sends an RRC connection reconfiguration to the UE; The UE then initiates an access to the target cell.
  • MME Mobility Management Ent
  • the serving node makes a handover decision, but the service node does not know the resource utilization of the other standard cells, and can only report through the user equipment or the mobile station.
  • the measurement results determine the signal quality of other cells. In this case, when the signal quality of the target cell is good and the load is heavy, the handover failure rate of switching to the target cell is high.
  • the technical problem to be solved by the embodiments of the present invention is to provide an inter-RAT handover method, a corresponding device (including a coordinator, a service node, and a target node) and a communication system, and the present invention can improve inter-RAT handover. Success rate.
  • an embodiment of the present invention provides a method for switching between wireless access technologies, including:
  • an embodiment of the present invention provides a method for switching between wireless access technologies, including:
  • the serving node of the serving cell where the UE is located After the serving node of the serving cell where the UE is located makes a handover decision to determine the target cell,
  • the coordinator receives a message for resource preparation for requesting handover sent by the serving node; the coordinator sends a message for requesting the target node to allocate resources for redirection to a target node of the target cell, and receives the message a message sent by the target node after the resource is allocated for the redirection to notify the coordinator of the redirected resource allocation result;
  • the coordinator sends a message to the serving node to prepare resources on the target node to notify the service node.
  • an embodiment of the present invention provides a network device, including: a first information processing module, configured to acquire measurement results of multiple neighboring cells of a serving cell where a UE is located; And acquiring information for determining a load situation of at least one neighboring cell in the multiple neighboring cells;
  • a first determining module configured to detect, according to the measurement result of the multiple neighboring cells, the multiple neighboring small The information of the load condition of at least one neighboring cell in the area is switched.
  • an embodiment of the present invention provides a coordinator, including: a fourth receiving module, configured to receive, by a serving node, a message for requesting resource preparation for handover, where the target node is a message sent after the resource is allocated for redirection to notify the coordinator of the redirected resource allocation result;
  • a fifth sending module configured to send, after the fourth receiving module receives the message for resource preparation for requesting handover, a message for requesting the target node to allocate resources for redirection, and And after the fourth receiving module receives the message for notifying the coordinator of the redirected resource allocation result, sending, to the serving node, the resource preparation notification on the target node The message of the service node.
  • an embodiment of the present invention provides a coordinator, including: a fifth receiving module, configured to receive a second handover notification sent by a serving node of a serving cell where a UE is located, where the second handover notification includes And the identifier is used to notify the coordinator to send, to the serving node, information about a load situation of at least one neighboring cell in a plurality of neighboring cells of the serving cell where the UE is located;
  • An information acquiring module configured to acquire information about a load situation of at least one neighboring cell in the multiple neighboring cells
  • a sixth sending module configured to send a second handover notification response to the serving node, so that the serving node determines a target node to be handed over, where the second handover notification response includes reacting at least one neighboring cell in the multiple neighboring cells Information on the load situation.
  • an embodiment of the present invention provides a service node, including: an eighth sending module, configured to send a first handover notification to a coordinator, so that the coordinator determines a target node to be switched, a handover notification includes measurement results of multiple neighbor cells of the serving cell where the serving node is located;
  • a seventh receiving module configured to receive a first handover notification response sent by the coordinator after determining the target node, and/or, configured to, at the coordinator, request the target node to allocate resources for redirection and the target After the node notifies the coordinator of the redirected resource allocation result, the node receives a message sent by the coordinator to notify the service node of resource preparation on the target node, where the first handover notification response includes The identity of the target cell.
  • an embodiment of the present invention provides a service node, including: And an eighth receiving module, configured to receive, by the UE, a measurement result of multiple neighboring cells of the serving cell where the serving node is located;
  • a second determining module configured to determine a target node according to the measurement result of the multiple neighboring cells
  • a ninth sending module configured to send, after the second determining module determines the target node, a request for switching to the coordinator a message prepared by the resource, so that the coordinator requests the target node to allocate resources for redirection;
  • a ninth receiving module configured to: after the target node notifies the coordinator of the redirected resource allocation result, receive a message sent by the coordinator to notify the serving node of resource preparation on the target node.
  • an embodiment of the present invention provides a target node, including: a tenth receiving module, configured to receive, by a coordinator, a message for requesting the target node to allocate resources for redirection;
  • a processing module configured to: after the tenth receiving module receives the message sent by the coordinator for requesting the target node to allocate resources for redirection, allocate resources for redirection to prepare resources for redirection;
  • a tenth sending module configured to notify the coordinator of the redirected resource allocation result
  • an embodiment of the present invention provides a communication system, where the communication system includes:
  • the service node provided by the seventh aspect of the embodiment of the present invention, the coordinator provided by the fourth aspect of the embodiment of the present invention, and the target node provided by the eighth aspect of the embodiment of the present invention are provided by the seventh aspect of the embodiment of the present invention, the coordinator provided by the fourth aspect of the embodiment of the present invention, and the target node provided by the eighth aspect of the embodiment of the present invention.
  • the network device provided by the third aspect of the embodiment of the present invention (the network device is a service node), the coordinator provided by the fifth aspect of the embodiment of the present invention, and the target node provided by the eighth aspect of the embodiment of the present invention; or :
  • the coordinator or the serving node integrates the signal quality and load information of the neighboring cell to perform the handover decision, which can improve the success rate of the inter-RAT handover; in addition, the coordinator is introduced into the communication system to transmit and receive related messages. Therefore, the inter-RAT handover process does not need to pass through the core network, thereby saving handover delay and improving handover success rate.
  • 1A is a multi-standard network coverage diagram of the prior art
  • FIG. 1B is a schematic diagram of a handover process of an existing handover from LTE to UMTS;
  • FIG. 2 is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of LTE from LTE according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a handover procedure for switching from UTRA to LTE according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a handover procedure for handover from LTE to GERAN according to an embodiment of the present invention; Is a schematic diagram of a handover procedure for switching from GERAN to LTE according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a handover procedure for switching from GERAN to UTRA according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a handover procedure for switching from UTRA to GERAN according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention
  • FIG. 11A is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention
  • FIG. 11B is an inter
  • FIG. 12A is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention
  • FIG. 12B is a schematic diagram of an inter-RAT handover procedure using an eNB as a serving node
  • FIG. 13 is a schematic diagram of an inter-RAT handover procedure using an eNB as a serving node
  • FIG. 14 is a schematic structural diagram of a network device according to an embodiment of the present invention
  • FIG. 11A is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention
  • FIG. 11B is an inter
  • FIG. 12A is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention
  • FIG. 12B is a schematic diagram
  • 15A is a schematic structural view of a coordinator according to an embodiment of the present invention.
  • 15B is a schematic structural view of a coordinator according to an embodiment of the present invention.
  • 16A is a schematic structural view of a coordinator according to an embodiment of the present invention.
  • 16B is a schematic structural view of a coordinator according to an embodiment of the present invention.
  • 17A is a schematic structural diagram of a service node according to an embodiment of the present invention
  • 17B is a schematic structural diagram of a service node according to an embodiment of the present invention
  • FIG. 18 is a schematic structural diagram of a target node according to an embodiment of the present invention.
  • 19A is a schematic structural view of a coordinator according to an embodiment of the present invention.
  • 19B is a schematic structural view of a coordinator according to an embodiment of the present invention.
  • 19C is a schematic structural view of a coordinator according to an embodiment of the present invention.
  • 20A is a schematic structural diagram of a service node according to an embodiment of the present invention.
  • 20B is a schematic structural diagram of a service node according to an embodiment of the present invention.
  • FIG. 21 is a schematic structural diagram of a network device according to an embodiment of the present invention. detailed description
  • the UE includes a terminal, an MS, a transceiver, a client, and the like.
  • FIG. 2 is a flow chart showing an inter-RAT handover method according to an embodiment of the present invention. The method includes:
  • S200 Obtain a measurement result of multiple neighboring cells of a serving cell where the UE is located.
  • S202 Obtain information that reflects a load situation of at least one neighboring cell in the multiple neighboring cells
  • S204 Determine, according to a measurement result of the multiple neighboring cells, and a load condition of at least one neighboring cell in the multiple neighboring cells. The information is switched.
  • the serving node of the serving cell where the UE is located may directly receive the measurement report reported by the UE to obtain the measurement result, or the coordinator receives the first handover notification that is sent by the UE and includes the measurement result. Thereby obtaining the measurement result.
  • the information about the load situation of the at least one neighboring cell in the multiple neighboring cells may include: load information and resource remaining information of at least one neighboring cell in the multiple neighboring cells, Or a target cell list generated according to load information and resource remaining information of at least one neighboring cell in the multiple neighboring cells.
  • the coordinator may periodically acquire load information and resource remaining information of at least one neighboring cell in multiple neighboring cells (for example, a periodic direction of the at least one neighboring cell)
  • the coordinator reports information about its load status and stores it (this storage can be selective. For example, the coordinator can store only the load status information of the neighboring cell whose load condition reaches a threshold); the coordinator can also receive the service node.
  • the load information and the resource remaining information are obtained from the at least one neighboring cell of the multiple neighboring cells; the coordinator may further obtain the load information and the resource remaining information of the at least one neighboring cell obtained.
  • Generating a target cell list for example, the coordinator selects a neighboring cell whose load condition reaches a threshold to form a target cell list); the serving node may acquire load information and resource remaining information of at least one neighboring cell of the multiple neighboring cells from the coordinator (here) Based on this, the serving node can generate a list of target cells, or obtain a list of target cells generated by the coordinator directly from the coordinator.
  • the coordinator or the serving node may determine signal quality (including: signal strength) of multiple neighboring cells according to measurement results of multiple neighboring cells, and perform handover decision by:
  • FIG. 3 is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention. The method includes:
  • the coordinator receives the first handover notification sent by the serving node, where the first handover notification includes a measurement result of multiple neighboring cells of the serving cell where the UE is located;
  • the coordinator acquires information that reflects a load situation of at least one neighboring cell in the multiple neighboring cells.
  • the coordinator determines the target cell according to the measurement result of the multiple neighboring cells and the information about the load condition of the at least one neighboring cell in the multiple neighboring cells.
  • the serving node may be an eNB, a base station (Node B), an RNC or a base station subsystem (BSS), and the BSS includes a base transceiver station (BTS) and a base station controller (BSC). ), in the various methods and devices of the present invention, The BTS and the BSC may also serve as the service node or the target node of the present invention, respectively.
  • inter-RAT handover method of the embodiment of the present invention is exemplarily described below in conjunction with several specific inter-RAT handover procedure diagrams.
  • Step 4.1 The UE reports the measured measurement report of the neighboring cell of the current serving cell to the monthly eNB of the serving cell;
  • Step 4.2 The serving eNB sends a first handover notification to the coordinator, where the first handover notification includes a measurement result of the UE to multiple neighboring cells.
  • the measurement result may include a combination of different information in the following information: Reference Signal Received Power (RSRP) and/or Reference Signal Received Quality (RSRQ) , and UTRA FDD common pilot channel received signal code domain power (UTRA FDD CPICH RSCP), UTRA FDD carrier received signal strength indicator (UTRA FDD carrier RSSI ), UTRA FDD common pilot channel per chip signal to noise ratio (UTRA FDD CPICH Ec/No ), GSM carrier received signal strength indication (GSM carrier RSSI ), UTRA TDD carrier received signal strength indication ( UTRA TDD carrier RSSI ), UTRA TDD main common control physical channel received signal code domain power (UTRA TDD P-CCPCH RSCP ), CDMA2000 lx wireless transmission technology pilot strength (CDMA2000 lx RTT Pilot Strength) and CDMA2000 high-speed packet data pilot strength (CDMA2000 HRPD Pilot Strength).
  • RSRP Reference Signal Received Power
  • RQ Reference Signal Received Quality
  • UTRA FDD common pilot channel received signal code domain power UTRA FDD
  • the measurement results when switching from LTE/UMTS/UTRA FDD/CDMA 2000 to UTRA TDD, the measurement results include UTRA TDD carrier RSSI and UTRA TDD P-CCPCH RSCP when switching from LTE/UMTS/UTRA FDD/ UTRA TDD to CDMA 2000
  • the measurement results include pilot strength information and the like. These are distinguishable by those skilled in the art, and are not described in detail herein. For the same reason, in the embodiments shown in FIG. 4 to FIG. 9 below, the information included in the measurement results is also an exemplary enumeration, and no detailed division is performed. And description.
  • Step 4.3 The coordinator determines the signal quality of the multiple neighboring cells according to the received measurement result, and determines the load condition of the at least one neighboring cell according to the acquired information about the load condition of the at least one neighboring cell in the multiple neighboring cells. Combining the above information to make a handover decision for the UE, and determining the target cell to be handed over;
  • Step 4.4 The coordinator sends a first handover notification response to the serving eNB, which includes the target cell.
  • Identification for example: physical identity of the target cell (PCI, Physical Cell ID) or target cell identity (CI, Cell ID));
  • Step 5.1 The UE reports the measured measurement report of the neighboring cell of the current serving cell to the serving RNC of the serving cell;
  • Step 5.2 The serving RNC sends a first handover notification to the coordinator, where the first handover notification includes a measurement result of the UE to multiple neighboring cells, and the measurement result may include: UTRA FDD CPICH RSCP, UTRA FDD carrier RSSL UTRA FDD CPICH Ec/No , UTRA TDD CPICH Ec/No , GSM carrier RSSL UTRA TDD carrier RSSL UTRA TDD P-CCPCH RSCP, CDMA2000 lx RTT Pilot Strength and CDMA2000 HRPD Pilot Strength.
  • UTRA FDD CPICH RSCP UTRA FDD carrier RSSL UTRA FDD CPICH Ec/No
  • UTRA TDD CPICH Ec/No UTRA TDD CPICH Ec/No
  • GSM carrier RSSL UTRA TDD carrier RSSL UTRA TDD P-CCPCH RSCP CDMA2000 lx RTT Pilot Strength and CDMA2000 HRPD Pilot Strength.
  • Step 5.3 The coordinator determines the signal quality of the multiple neighboring cells according to the received measurement result, and determines the load condition of the at least one neighboring cell according to the obtained information about the load situation of the at least one neighboring cell in the multiple neighboring cells. Combining the above information to make a handover decision for the UE, and determining the target cell to be handed over;
  • Step 5.4 The coordinator sends a first handover notification response to the serving RNC, which includes the identity of the target cell (eg, PCI or CI);
  • Step 6.1 The UE reports the measured measurement report of the neighboring cell of the current serving cell to the monthly eNB of the serving cell;
  • Step 6.2 The serving eNB sends a first handover notification to the coordinator, where the first handover notification includes a measurement result of the UE to multiple neighboring cells, and the measurement result may include: RSRP and/or RSRQ, and UTRA FDD CPICH RSCP, UTRA FDD carrier RSSI, UTRA FDD CPICH Ec/No, UTRA TDD CPICH Ec/No and GSM carrier RSSI;
  • Step 6.3 The coordinator determines the signal quality of the multiple neighboring cells according to the received measurement result, and determines the load condition of the at least one neighboring cell according to the obtained information about the load situation of the at least one neighboring cell in the multiple neighboring cells. Combining the above information to make a handover decision for the UE, and determining the target cell to be handed over;
  • Step 6.4 The coordinator sends a first handover notification response to the serving eNB, which includes an identifier of the target cell (for example, PCI or CI);
  • Step 7.1 The UE reports the measured measurement report of the neighboring cell of the serving cell to the serving BSS of the serving cell;
  • Step 7.2 The serving BSS sends a first handover notification to the coordinator, where the first handover notification includes a measurement result of the UE to multiple neighboring cells, and the measurement result may include: RSRP and/or RSRQ, and GSM carrier RSSL UTRA FDD CPICH RSCP, UTRA FDD carrier RSSL UTRA FDD CPICH Ec/No and UTRA TDD CPICH Ec/No;
  • Step 7.3 The coordinator determines the signal quality of the multiple neighboring cells according to the received measurement result, and determines the load condition of the at least one neighboring cell according to the obtained information about the load condition of the at least one neighboring cell in the multiple neighboring cells. Combining the above information to make a handover decision for the UE, and determining the target cell to be handed over;
  • Step 7.4 The coordinator sends a first handover notification response to the serving BSS, which includes the identity of the target cell (eg, PCI or CI);
  • Step 8.1 The MS reports the measured measurement report of the neighboring cell of the serving cell to the serving BSS of the serving cell;
  • Step 8.2 The serving BSS sends a first handover notification to the coordinator, where the first handover notification includes the measurement result of the MS to multiple neighboring cells, and the measurement result may include: RSRP and/or RSRQ, and UTRA FDD CPICH RSCP, UTRA FDD carrier RSSI, UTRA FDD CPICH Ec/No, GSM carrier RSSL UTRA TDD carrier RSSI, TRA TDD P-CCPCH RSCP, CDMA2000 lx RTT Pilot Strength and CDMA2000 HRPD Pilot Strength;
  • Step 8.3 The coordinator determines the signal quality of the multiple neighboring cells according to the received measurement result, and determines the load condition of the at least one neighboring cell according to the acquired information about the load condition of the at least one neighboring cell in the multiple neighboring cells. Synthesize the above information to make a handover decision for the MS, and decide to switch to the target cell;
  • Step 8.4 The coordinator sends a first handover notification response to the serving BSS, including the target cell. Identification (such as PCI or CI);
  • Step 9.1 The MS reports the measured measurement result of the neighboring cell of the serving cell to the serving RNC of the serving cell;
  • Step 9.2 The serving RNC sends a first handover notification to the coordinator, where the first handover notification includes measurement results of the MS for multiple neighboring cells, and the measurement result may include RSRP and/or RSRQ, and UTRA FDD CPICH RSCP, UTRA FDD carrier RSSI , UTRA FDD CPICH Ec/No, UTRA TDD CPICH Ec/No and GSM carrier RSSI;
  • Step 9.3 The coordinator determines the signal quality of the multiple neighboring cells according to the received measurement result, and determines the load status of the at least one neighboring cell according to the acquired information about the load situation of the at least one neighboring cell in the multiple neighboring cells. Synthesize the above information to make a handover decision for the MS, and decide to switch to the target cell;
  • Step 9.4 The coordinator sends a first handover notification response to the serving RNC, which includes the identity of the target cell (eg, PCI or CI);
  • FIG. 10 is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention. The method includes:
  • the serving node receives a measurement result of multiple neighboring cells of the serving cell where the UE is reported by the UE;
  • S1002 The serving node sends a second handover notification to the coordinator.
  • the serving node receives a second handover notification response sent by the coordinator, where the second handover notification response includes information that reflects a load situation of at least one neighboring cell in the multiple neighboring cells.
  • the serving node performs a handover decision. Specifically, the serving node determines the target cell according to the measurement result of the multiple neighboring cells and the information of the load condition of the at least one neighboring cell in the multiple neighboring cells.
  • the second handover notification is used to notify the coordinator that a UE under the serving node is to perform handover, and the second handover notification includes an identifier, where the identifier is used to notify the coordinator to send a response to the current serving cell.
  • Load of at least one neighboring cell in multiple neighboring cells the identifier may be represented by a flag.
  • the flag When the flag is 0, the coordinator does not need to send the neighbor cell load situation related information to the current serving cell.
  • the flag is 1, the coordinator sends the response to the current serving cell.
  • the second handover notification response may include load information and resource remaining information of the at least one neighboring cell, or include a target cell list generated according to load information and resource remaining information of the at least one neighboring cell.
  • the service node may be an eNB, a Node B, an RNC, or a BSS.
  • the inter-RAT handover method of the present invention is exemplarily described below in conjunction with several specific inter-RAT handover procedures.
  • Step 1 The UE reports the measured measurement report of the neighboring cell of the current serving cell to the serving eNB of the serving cell;
  • Step 2 The serving eNB sends a second handover notification to the coordinator, to notify the coordinator that a UE under the serving eNB is to perform handover, and the second handover notification includes an identifier, where the identifier is used to notify the coordinator to send a response to the neighboring cell to the serving cell.
  • Step 3 After receiving the second handover notification, the coordinator sends a second handover notification response to the serving eNB, where the coordinator may include load information and resource remaining information of the at least one neighboring cell, or include a coordinator according to the at least one neighboring cell. a list of target cells recommended by the load node and the resource remaining information to the service node;
  • Step 4 The serving eNB selects the target cell group A with better signal quality or signal strength according to the received measurement report, and then selects the target cell group B with lighter load according to the load information and resource remaining information of the at least one neighboring cell fed back by the coordinator ( Or, according to the target cell list recommended by the coordinator, the target cell group B) is determined, and the two target cell groups are intersected to select the target cell to be switched; the subsequent steps may be well-known techniques, and are not described in detail herein.
  • the serving RNC receives the measurement report reported by the UE and performs information exchange with the coordinator; in the handover process of the LTE handover to the GERAN, the serving eNB receives the measurement report reported by the UE and performs information interaction with the coordinator; In the handover process of the GERAN handover to the LTE, the serving BSS receives the measurement report reported by the UE and performs information exchange with the coordinator; in the handover process of the GERAN handover to the UTRA, the serving BSS receives the measurement report reported by the MS and performs information interaction with the coordinator; In the handover process of the UTRA handover to the GERAN, the serving RNC receives the measurement report reported by the MS and performs information interaction with the coordinator.
  • the serving RNC receives the measurement report reported by the MS and performs information interaction with the coordinator.
  • the inter-RAT handover method of the present invention uses a coordinator or a serving node to perform a handover decision, and can combine the signal quality of multiple neighboring cells of the current serving cell and the load condition of at least one neighboring cell of multiple neighboring cells, thereby improving inter- The success rate of RAT handover.
  • FIG. 11A is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention, where the method includes:
  • the coordinator receives a first handover notification sent by the serving node, where the first handover notification includes a measurement result of multiple neighboring cells of the serving cell where the UE is located;
  • the coordinator acquires information that reflects a load situation of at least one neighboring cell in the multiple neighboring cells.
  • the coordinator determines the target cell according to the measurement result of the multiple neighboring cells and the information about the load condition of the at least one neighboring cell in the multiple neighboring cells.
  • S1106 The coordinator sends a message to the target node of the target cell for requesting the target node to allocate resources for redirection;
  • S1108 The coordinator receives a message sent by the target node to notify the coordinator of the resource allocation result after the resource is allocated for the redirection;
  • S1110 The coordinator sends a message to the service node for notifying the service node of the resource preparation on the target node.
  • steps S1100, S1102, and S1104 please refer to the descriptions of the corresponding steps in the embodiment shown in FIG. 2 and FIG. 3 and FIG. 4 to FIG. 9, which will not be described in detail herein.
  • the service node in this embodiment includes: an eNB, a Node B, an RNC, or a BSS.
  • FIG. 11B is a schematic diagram of an inter-RAT handover procedure using an eNB as a serving node, where the implementation implements handover of LTE to UTRA, where the target node is RNCo. specifically,
  • Step 11.1 The serving cell configuration measurement configuration is configured to the UE
  • Step 11.2 The UE reports the measured measurement report of the neighboring cell to the serving eNB of the serving cell; (Steps 11.1 and 11.2 may adopt the prior art);
  • Step 11.3 The serving eNB sends a first handover notification to the coordinator, where the first handover notification includes measurement results of multiple neighboring cells of the serving cell where the UE is located.
  • Step 11.4 The coordinator performs a handover decision to determine the target RNC. For specific steps, refer to step S1102 and step S1104 in FIG. 11A;
  • Step 11.5 The coordinator sends a handover request to the target RNC for requesting the target RNC to allocate resources for redirection, and the message includes but is not limited to the following information: UE identifier (UE Identifier), cause (Cause), core domain identifier (CN Domain) Indicator ), Integrity protection information, Encryption information, RAB to be setup list, CSG related information, and transparent container from the source RNC to the target RNC (Source) RNC to Target RNC Transparent Container );
  • UE identifier UE Identifier
  • cause Create
  • CN Domain core domain identifier
  • Integrity protection information Integrity protection information
  • Encryption information RAB to be setup list
  • CSG related information CSG related information
  • transparent container from the source RNC to the target RNC (Source) RNC to Target RNC Transparent Container );
  • Step 11.6 After the target RNC allocates resources for redirection, the target RNC sends a handover request response for notifying the coordinator of the redirected resource allocation result to the coordinator, and the message may include but is not limited to the following information: a transparent container of the target RNC to the source RNC ( Target RNC to Source RNC Transparent Container ), Radio Access 7 RABs setup list and RABs failed to setup list;
  • Step 11.7 The coordinator sends a handover command to the serving eNB to notify the service node of the resource preparation on the target RNC, and the message may include but is not limited to the following information: Target to Source Transparent Container, wireless Access? E-RABs to Release List and data pre-patch list;
  • the coordinator after performing the handover decision to determine the target node, the coordinator sends a handover request to the target node to request the target node to allocate resources for redirection; the target node sends a handover request response to the coordinator after allocating resources for the redirection. Notifying the coordinator of the redirected resource allocation result; the coordinator sends a handover command to the serving node to notify the service node of the resource preparation on the target node. among them,
  • the handover request may include but is not limited to the following information: Cause, Target Cell Identifier, PFCs to be set-up list, packet flow Context (Packet Flow Context (PFC)), source RNC to Target BSS Transparent Container and NAS container for handover; handover request response may include but not limited to the following Information: Target to Source Transparent Container, SIAP Cause, Evolved Packet System Bearers setup list (EPS) and evolution points
  • the group system 7 includes an EPS Bearers failed to setup list; the switch command may include, but is not limited to, the following information: Target to Source Transparent Container, E-RABs to Release List, Data Forwarding List.
  • the handover request may include but is not limited to the following information: UE Identifier, SIAP Cause, encryption related parameters and algorithms, NAS Security Parameters to E-UTRAN, evolved network
  • the switch request response may include but is not limited to the following information: Target to Source Transparent Container, EPS Bearers
  • the handover command may include, but is not limited to, the following information: a target RNC to Source RNC Transparent Container, a RABs to be Released List, and a data preamble list.
  • the handover request may include but is not limited to the following information: UE Identifier, SIAP Cause, integrity protection related parameters and algorithms, encryption related parameters and algorithms, bearer establishment J 1 J table ( Bearers to be setup list ), Source to Target Transparent Container, and Handover Restriction List; handover request responses may include, but are not limited to, the following information: Target to Source Transparent Container, SIAP Cause, EPS Bearers setup list, and EPS Bearers
  • the failover to setup list may include, but is not limited to, the following information: Temporary Logical Link Identity (TLLI), List of Set Up PFCs to be established, and target RNC to source BSS Transparent RNC to Source BSS Transparent Container and Cause.
  • TLI Temporary Logical Link Identity
  • the handover request may include but is not limited to the following information: Cause, Target Cell Identifier, Source BSS to Target BSS Transparent Container, and NAS container for
  • the handover request response may include, but is not limited to, the following information: a target BSS to Source BSS Transparent Container; the handover command may include but is not limited to the following information: Target BSS to Source BSS Transparent Container ⁇ RABs To be Released List and data prep list.
  • the handover request may include but is not limited to the following information: Permanent Non-Access Stratum Identity (Permanent NAS Identity), Cause, CN Domain Indicator, Integrity protection information, Encryption information, RABs To Be Set Up List, Source to Target Transparent Container, and Iu Signalling connection identifier;
  • the handover request response may include but is not limited to the following Information: Source to Target Transparent Container ⁇ RABs setup list, and RABS failed to setup list;
  • the handover command may include, but is not limited to, the following information: TLLI, List of Set Up PFCs, and Source to Target Transparent Container.
  • FIG. 12A is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention, where the method includes:
  • the coordinator receives a first handover notification sent by the serving node, where the first handover notification includes a measurement result of multiple neighboring cells of the serving cell where the UE is located.
  • the coordinator acquires information that reflects a load situation of at least one neighboring cell in the multiple neighboring cells.
  • the coordinator determines the target cell according to the measurement result of the multiple neighboring cells and the information about the load condition of the at least one neighboring cell in the multiple neighboring cells.
  • the coordinator sends a first handover notification response to the serving node, where the first handover notification response includes an identifier of the target cell.
  • S1208 The coordinator receives a message sent by the serving node for requesting resource preparation for handover;
  • S1210 The coordinator sends a message to the target node for requesting the target node to allocate resources for redirection;
  • S1212 The coordinator receives a message sent by the target node to notify the coordinator after the resource is allocated for the redirection, and the result of the retargeting resource allocation is sent;
  • S1214 The coordinator sends a message to the service node for notifying the service node of the resource preparation on the target node.
  • the service node in this embodiment includes: an eNB, a Node B, an RNC, or a BSS.
  • steps S1200 to S1206 please refer to the corresponding descriptions in the embodiments shown in FIG. 2 and FIG. 10, and details are not described herein.
  • steps S1208 to S1214 please refer to the corresponding descriptions of the six implementations listed below.
  • FIG. 12B is a schematic diagram of a handover procedure using an eNB as a serving node, where the implementation implements handover of LTE to GERAN/CDMA 2000, where the target node is a BSS. . specifically, Steps 12.1 and 12.2 refer to the corresponding description in FIG. 11B;
  • Step 12.3, Step 12.4 and Step 12.5 refer to Step 1200 to Step 1206 in FIG. 12A.
  • Step 12.6 The serving eNB sends a handover request for resource preparation for requesting handover to the coordinator, and the message may include but is not limited to the following information: 1 AP Cause, Target System Identifier and Source to Target Transparent Container;
  • Step 12.7 The coordinator sends a handover request to the target BSS for requesting the target BSS to allocate resources for redirection, including but not limited to the following information: Cause, Target Cell Identifier, PFCs to be set-up list, Source RNC to Target BSS Transparent Container and NAS container for handover;
  • Step 12.8 The target BSS allocates resources for redirection to prepare for the redirection resource, and sends a handover request response to the coordinator for notifying the coordinator of the redirected resource allocation result, which may include but is not limited to the following information: Target to Source Transparent Container, S1AP Cause, EPS Bearers setup list, and EPS Bearers failed to setup list;
  • Step 12.9 The coordinator sends a handover request response to the serving eNB for notifying the service node of the resource preparation on the target BSS, the message may include but is not limited to the following information: Target to Source Transparent Container ⁇ E-RABs to Release List and data preamble ⁇ 1 J table;
  • the serving eNB sends a handover request for resource preparation for requesting handover to the coordinator
  • the message may include but is not limited to the following information: Cause, target RNC identifier (Target RNC Identifier), closed subscriber group The identifier (CSG ID), the CSG access mode, and the Source to Target Transparent Container
  • the coordinator sends a redirect request to the target RNC to request the target RNC to allocate resources for the redirect, and the message may include but is not limited to the following Information: UE Identifier, Cause, CN Domain Indicator, Integrity protection information, Encryption information, RAB to be setup list, CSG related information, and Source RNC to Target RNC Transparent Container
  • the target RNC sends the resource to the coordinator after allocating resources for the redirect Notifying the coordinator of the redirect request response of the redirected resource allocation result
  • the message may include but is not limited to the following information: Target RNC to Source RNC Transparent Container, RABs setup list, and RABs
  • the serving RNC sends a redirection request for resource preparation for requesting handover to the coordinator, which may include but is not limited to the following information: Cause, target eNB Identifier, CSG correlation The information, the source RNC identifier (Source RNC Identifier) and the source RNC to Target RNC Transparent Container; the coordinator sends a handover request to the target eNB for requesting the target eNB to allocate resources for redirection, the message including but not limited to the following information: UE Identifier, S1AP Cause, encryption related parameters and algorithms, NAS Security Parameters to E-UTRAN, EPS Bearers to be setup list, CSG related information, and Source to Target Transparent Container; the target eNB sends the resource to the coordinator after the resource is allocated for redirection
  • the directed resource allocation result notifies the coordinator of the handover request response, and the message may include but is not limited to the following information: Target to Source Transparent Container, EPS Bearers setup list, and EPS Bearers
  • the serving BSS sends a handover request for resource preparation for requesting handover to the coordinator, which may include but not limited to: Cause, Source Cell Identifier, Target eNB The Identifier and the source BSS to the target RNC transparent container; the coordinator sends a handover request to the target eNB for requesting the target eNB to allocate resources for redirection, and the message may include but not limited to the following information: Identifier, S1AP Cause, integrity protection related parameters and algorithms, encryption related parameters and algorithms, Bearers to be setup list, Source to Target Transparent Container and Handover Restriction List; the target eNB sends a resource to the coordinator after allocating resources for redirection The redirected resource allocation result notifies the coordinator of the handover request response, and the message may include but is not limited to the following information: Target to Source Transparent Container ⁇ S1AP Cause ⁇ EPS Bearers setup list and EPS Bearers failed to setup list; coordinator Send for ⁇ 1 The resource preparation
  • the serving RNC sends a redirection request for resource preparation for requesting handover to the coordinator, which may include but is not limited to the following information: Relocation Type, Cause, The source ID (Source ID), the target end identifier (Target ID), and the Source BSS To Target BSS Transparent Container;
  • the coordinator sends a handover request to the target BSS for requesting the target BSS to allocate resources for redirection, and the message may include but is not limited to The following information: Cause, Target Cell Identifier ⁇ Source BSS to Target BSS Transparent Container and NAS container for handover;
  • the target BSS sends a handover request response to the coordinator to notify the coordinator of the redirected resource allocation result after allocating resources for the redirect,
  • the message may include but is not limited to the following information: Target BSS to Source BSS Transparent
  • the RNC's redirection requires a response, which may include, but is not limited to, the following information: Target BSS to Source BSS Transparent Container, RABs to be Released List, and data preamble list.
  • the serving BSS sends a handover request for resource preparation for requesting handover to the coordinator, which may include but is not limited to the following information: TLLL Cause, Source Cell Identifier , Target RNC Identifier, Source to Target Transparent Container, and Active Packet Context 1 J Table
  • the coordinator sends a redirect request to the target RNC for requesting the target RNC to allocate resources for redirection, and the message may include but is not limited to the following information: Permanent NAS Identity, Cause, CN Domain Indicator, Integrity protection information, Encryption information, RABs To Be Set Up List, Source to Target Transparent Container, and Iu Signalling connection identifier; the target RNC sends a redirect request response to the coordinator to notify the coordinator of the redirected resource allocation result after allocating resources for the redirect,
  • the message may include, but is not limited to, the following information: Source to Target Transparent Container ⁇ RABs setup list and RABS failed to setup list; the coordinator sends a handover request response for the resource preparation notification service BSS on the target RNC to the serving BSS, the message This may include, but is not limited to, the following information: TLLI, List of Set Up PFCs, and Source to Target Transparent Container radical
  • FIG. 13 is a schematic flowchart of an inter-RAT handover method according to an embodiment of the present invention, where the method includes:
  • S1300 After the serving node of the serving cell where the UE is located makes a handover decision to determine the target cell, the coordinator receives a message sent by the serving node for requesting resource preparation for handover.
  • S1302 The coordinator sends a message for requesting the target node to allocate resources for redirection to the target node of the target cell, and receives a message that is sent by the target node to notify the coordinator of the redirected resource allocation result after the resource is allocated for the redirection;
  • S1304 The coordinator sends a message to the service node for notifying the service node of the resource preparation on the target node.
  • the serving node of the serving cell where the UE is located to make the handover decision to determine the target cell may include: the monthly service node may determine, according to the measurement result of the multiple neighboring cells on the UE >3 ⁇ 4 The signal quality of the multiple neighboring cells is described, and the neighboring cell with the best signal quality among the multiple neighboring cells is selected as the target cell.
  • the serving node of the serving cell where the UE is located makes a handover decision to determine that the target cell can adopt the scheme of the embodiment shown in FIG.
  • step S1300 to step S1304 please refer to the description of step S1208 to step S1214 in the embodiment shown in FIG. 12A, which will not be described in detail herein.
  • the inter-RAT handover method of the present invention utilizes a coordinator, a service node, and a target node to communicate, so that the core network does not need to be passed during the handover process, which saves handover delay and improves handover success rate.
  • FIG. 14 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • the network device 140 includes:
  • the first information processing module 1402 is configured to obtain measurement results of multiple neighboring cells of the serving cell where the UE is located;
  • the second information processing module 1404 is configured to acquire information that reflects a load situation of at least one neighboring cell in the multiple neighboring cells.
  • the first determining module 1406 is configured to perform a handover decision according to the measurement result of the multiple neighboring cells and information that reflects a load condition of at least one neighboring cell in the multiple neighboring cells.
  • the information about the load situation of the at least one neighboring cell in the multiple neighboring cells includes: load information and resource remaining information of the at least one neighboring cell, or includes load information and resource remaining according to the at least one neighboring cell A list of target cells generated by the information.
  • the network device 140 of the present invention may be a coordinator or a serving node, and the serving node includes: an eNB, a Node B, an RNC, or a BSS.
  • the network device 140 (including a coordinator or a service node)
  • the first decision module 1406 can determine the signal quality (including: signal strength) of multiple neighboring cells according to the measurement results of multiple neighboring cells, and perform handover decision in the following manner:
  • FIG. 15A is a schematic structural diagram of a coordinator according to an embodiment of the present invention, and the coordinator 150 includes:
  • the first information processing module 1502 is configured to receive a first handover notification sent by a serving node of the serving cell where the UE is located, where the first handover notification includes a measurement result of multiple neighboring cells of the serving cell where the UE is located;
  • the second information processing module 1504 is configured to acquire information that reflects a load situation of at least one neighboring cell in the multiple neighboring cells.
  • the first determining module 1506 is configured to determine a target cell according to the measurement result of the multiple neighboring cells and information that reflects a load condition of at least one neighboring cell in the multiple neighboring cells.
  • the service node includes an eNB, a Node B, an RNC, or a BSS.
  • the coordinator 150 of this embodiment can be used to perform the steps performed by the coordinator in the embodiment shown in FIG.
  • the second information processing module 1504 periodically acquires load information and resource remaining information of at least one neighboring cell in multiple neighboring cells (for example, a periodic direction of the at least one neighboring cell)
  • the coordinator reports its load condition and stores it (the storage can be selective. For example, the coordinator can store only the load situation related information of the neighboring cell whose load condition reaches a threshold); the coordinator can also be sent at the receiving service node.
  • the triggering message for example, the second handover notification
  • the load information and the resource remaining information are acquired from at least one neighboring cell of the multiple neighboring cells; the coordinator may further generate a target according to the acquired load information and resource remaining information of the at least one neighboring cell.
  • the cell list for example, the coordinator selects a neighbor cell whose load condition reaches a threshold to form a target cell list).
  • first decision module 1506 For the description of the first decision module 1506, please refer to the first decision module in the embodiment shown in FIG. The description of 1406 is not detailed here.
  • coordinatorl52 includes all modules and functions of coordinatorl50, and also includes:
  • the first sending module 1522 is configured to send, to the target node of the target cell, a message for requesting the target node to allocate resources for redirection, for example, a handover request;
  • the first receiving module 1524 is configured to receive a message that is sent by the target node to notify the coordinator of the redirected resource allocation result after the resource is allocated for the redirect, for example, the handover request response.
  • the second sending module 1526 is configured to send, to the serving node, a message for preparing resources on the target node to notify the service node, for example, a handover command.
  • the coordinator 15 of this embodiment can be used to perform the steps performed by the coordinator in the embodiment shown in Fig. 11A.
  • the target node includes an eNB, a Node B, an RNC, or a BSS.
  • eNB evolved Node B
  • RNC Radio Network Controller
  • BSS Base Station
  • FIG. 16A is a schematic structural diagram of a coordinator according to an embodiment of the present invention.
  • the coordinator 60 includes: a first information processing module 1602, a second information processing module 1604, a first decision module 1606, and a handover notification response sending module 1608.
  • the handover notification response sending module 1608 is configured to send a first handover notification response to the serving node, where the first handover notification response includes an identifier of the target cell (eg, PCI or CI).
  • the coordinator 160 of this embodiment can be used to perform the steps performed by the coordinator in the embodiment shown in FIGS. 4 to 9.
  • the coordinator 162 includes all of the modules and functions of the coordinator 160, and also includes:
  • the second receiving module 1622 is configured to receive a message for resource preparation for requesting handover sent by the serving node, and send, by the target node that receives the target cell, a resource allocation result that is sent after the resource is allocated for redirection Coordinator message;
  • the third sending module 1624 is configured to send, to the target node, a message for requesting the target node to allocate resources for redirection, and send a message to the serving node to notify the serving node of the resource preparation on the target node.
  • the coordinator 160 of this embodiment can be used to perform the coordinator in the embodiment shown in FIG. 12A. The steps performed.
  • the target node includes an eNB, a Node B, an RNC, or a BSS; the serving node includes an eNB, a Node B, an RNC, or a BSS.
  • Figure 17A is a block diagram showing the structure of a service node in accordance with one embodiment of the present invention.
  • the service node 170 includes:
  • the first information processing module 1702 is configured to receive measurement results of multiple neighbor cells of the serving cell where the UE is reported by the UE;
  • the second information processing module 1704 is configured to send a second handover notification to the coordinator and receive a second handover notification response sent by the coordinator, where the second handover notification response includes responding to a load condition of at least one neighboring cell in the multiple neighboring cells.
  • the first determining module 1706 is configured to determine a target cell according to the measurement result of the multiple neighboring cells and information that reflects a load condition of at least one neighboring cell in the multiple neighboring cells.
  • the second information processing module 1704 can include a first sub-module la and a second sub-module 2a.
  • the first submodule 1a is configured to send a second handover notification to the coordinator;
  • the second submodule 2a is configured to receive a second handover notification response sent by the coordinator, where the second handover notification response includes reacting at least one neighbor of the multiple neighboring cells Information about the load situation of the cell.
  • the serving node 170 can be an eNB, a Node B, an RNC, or a BSS.
  • the second handover notification includes an identifier, and the identifier is used to notify the coordinator to send information to the service node that reflects the load condition of the at least one neighboring cell.
  • the identifier may be represented by a flag. When the flag is 0, the coordinator does not need to send information to the current serving cell that reflects the load condition of the at least one neighboring cell; when the flag is 1, the coordinator sends a response to the current serving cell. Information about the load situation of at least one neighboring cell.
  • the second handover notification response may include load information and resource remaining information of the at least one neighboring cell, or a target cell list generated according to load information and resource remaining information of the at least one neighboring cell.
  • the service node 170 of this embodiment can be used to perform the steps performed by the service node in the embodiment shown in FIG.
  • the service node 172 includes all the modules and functions of the service node 170, and also includes:
  • the fourth sending module 1722 is configured to send, to the coordinator, a message for requesting resource preparation for handover, so that the coordinator requests the target node of the target cell to allocate resources for redirection. ;
  • the third receiving module 1724 is configured to notify, at the target node, the redirected resource allocation result After the coordinator, the message sent by the coordinator for notifying the service node of the resource on the target node is received.
  • the service node 172 of this embodiment can be used to perform the steps performed by the service node in the embodiment shown in Figure 12A.
  • the coordinator and the serving node provided by the invention can perform handover decision according to the signal quality and load condition information of the neighboring cell, and improve the handover success rate.
  • FIG. 18 is a schematic structural diagram of a target node according to an embodiment of the present invention.
  • the target node 180 includes: a tenth receiving module 1802, a processing module 1804, and a tenth transmitting module 1806.
  • the tenth receiving module 1802 is configured to receive a message sent by the coordinator for requesting the target node to allocate resources for redirection; and the processing module 1804 is configured to receive, by the tenth receiving module 1802, the coordinator for requesting that the target node is heavy. After the message of the resource allocation is directed, the resource is allocated for the redirection to prepare the resource for the redirection; the tenth sending module 1806 is configured to notify the coordinator of the redirected resource allocation result.
  • the target node 180 of this embodiment can be used to implement the functions of the target node in the embodiment shown in Fig. 11A, Fig. 12A or Fig. 13.
  • the target node 180 can be an eNB, a Node B, an RNC, or a BSS.
  • FIG. 19A is a schematic structural diagram of a coordinator according to an embodiment of the present invention, the coordinator 190 includes:
  • a fourth receiving module 1902 configured to receive a message prepared by the serving node for requesting resource reservation, and a message sent by the target node to notify the coordinator of the redirected resource allocation result after the resource is allocated for redirection ;
  • the fifth sending module 1904 is configured to send, after the fourth receiving module 1902 receives the message for requesting resource preparation for the handover, a message for requesting the target node to allocate resources for redirection, and for receiving in the fourth
  • the module 1902 receives a message for notifying the redirected resource allocation result to the coordinator and then sends a message to the serving node to notify the service node of the resource preparation on the target node.
  • the coordinator 190 of this embodiment can be used to perform the steps performed by the coordinator in the embodiment shown in FIG.
  • FIG. 19B is a schematic structural diagram of a coordinator according to an embodiment of the present invention.
  • the coordinator 192 includes:
  • the fifth receiving module 1922 is configured to receive a second cut sent by the serving node of the serving cell where the UE is located. Transmitting the notification, the second handover notification includes an identifier, where the identifier is used to notify the coordinator to send, to the serving node, the information about the load condition of the at least one neighboring cell in the plurality of neighboring cells of the serving cell where the UE is located. And acquiring information for determining a load situation of at least one neighboring cell in the multiple neighboring cells;
  • the sixth sending module 1926 is configured to send a second handover notification response to the serving node, so that the serving node determines the target node to be handed over, where the second handover notification response includes responding to a load condition of at least one neighboring cell in the multiple neighboring cells. Information.
  • the coordinator 192 of this embodiment can be used to perform the steps performed by the coordinator in the embodiment shown in FIG.
  • FIG. 19C is a schematic diagram showing the structure of a coordinator according to an embodiment of the present invention.
  • the coordinator 94 includes all the modules and functions in the embodiment shown in FIG. 19B, and:
  • a sixth receiving module 1942 configured to receive a message prepared by the serving node for requesting resource reservation, and a message sent by the target node to notify the coordinator of the redirected resource allocation result after the resource is allocated for redirection;
  • the seventh sending module 1944 is configured to send, after the sixth receiving module 1942 receives the message for requesting resource preparation for the handover, a message for requesting the target node to allocate resources for redirection, and The receiving module 1942 receives a message for notifying the redirected resource allocation result to the coordinator, and then sends a message to the serving node to notify the service node of the resource preparation on the target node.
  • the coordinator 194 of the present embodiment can be used to perform the steps performed by the coordinator in the embodiment shown in Fig. 12A.
  • FIG. 20A is a schematic structural diagram of a service node according to an embodiment of the present invention.
  • the service node 200 includes: an eighth sending module 2002 and a seventh receiving module 2004. among them,
  • the eighth sending module 2002 is configured to send a first handover notification to the coordinator (the first handover notification includes a measurement result of multiple neighboring cells of the serving cell where the serving node is located), so that the coordinator determines the target node to be switched, and the seventh receiving module 2004 A message (eg, a handover command) for receiving a coordinator sent to notify a service node of resource preparation on a target node.
  • the service node 200 can be used to perform the steps performed by the service node in the embodiment shown in FIG. 11A, and the monthly service node 200 can form a communication system with the coordinator 52 and the target node 180 described above.
  • the eighth sending module 2002 is configured to send a first handover notification to the coordinator (the first handover notification includes a measurement result of multiple neighboring cells of the serving cell where the serving node is located), so that the coordinator determines the target node to be switched, and the seventh receiving The module 2004 is configured to receive a first handover notification response that is sent by the coordinator after determining the target node, where the first handover notification response includes an identifier of the target cell.
  • the service node 200 can perform subsequent signaling transmission by using the prior art.
  • the communication system may include the monthly service node 200 and the coordinatorl60 described above), and the following operations may also be performed:
  • the eighth transmission module 2002 transmits a message for requesting resource preparation for handover to the coordinator for coordinator
  • the requesting target node allocates resources for redirection;
  • the seventh receiving module 2004 receives a message sent by the coordinator for notifying the serving node of the resource preparation on the target node.
  • the service node 200 can be used to perform the steps performed by the service node in the embodiment shown in Fig. 12A, and can constitute a communication system with the coordinator 162 and the target node 180 described above.
  • FIG. 20B is a schematic structural diagram of a service node according to an embodiment of the present invention.
  • the service node 202 includes:
  • the eighth receiving module 2022 is configured to receive measurement results of multiple neighboring cells of the serving cell where the UE is reported by the UE;
  • the second determining module 2024 is configured to perform a handover decision according to the measurement result of the multiple neighboring cells of the serving cell where the UE is located (that is, the serving cell where the serving node 202 is located) to determine the target node; and the ninth sending module 2026, After determining the target node by the second decision module 2024, sending a message for requesting resource preparation for handover (for example, the handover request in the embodiment shown in FIG. 13) to the coordinator, so that the coordinator requests the target node to allocate resources for the redirection;
  • the ninth receiving module 2028 is configured to: after the target node notifies the coordinator of the redirected resource allocation result, receive a message sent by the coordinator to notify the serving node of the resource preparation on the target node (for example, the embodiment shown in FIG. 13 Switch command in).
  • the service node 202 can be used to perform the steps performed by the service node in the first implementation of the embodiment shown in Fig. 13, and form a communication system with the coordinator 90 and the target node 180 described above.
  • the serving node 200 in Fig. 20A and the serving node 202 in Fig. 20B may be an eNB, a Node B, an RNC or a BSS.
  • FIG. 21 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • the network device 210 includes: Transceiver 2101, memory 2102 and processor 2103. specifically,
  • the network device 210 may be a coordinator.
  • the transceiver 2101 may be configured to communicate with the outside, for example, receiving a first handover notification or a second handover notification sent by the serving node, acquiring load information of the neighboring cell, and sending the information to the serving node.
  • Receiving, by the first handover notification response or the second handover notification response, a handover request sent by the service node, and sending a redirect request to the target node receiving a redirect request response sent by the target node, and sending a handover request response to the serving node, and sending the response request response to the serving node
  • the switch 2102 is coupled to the processor 2103.
  • the memory 2102 is configured to store various programs and applications, and may also be used to store the acquired load information of the neighboring cell, etc.
  • the processor 2103 is configured to receive the received information according to the transceiver 2101. Information, and calls the program, application or other data stored in the memory 2102 to implement functions such as handover decisions.
  • the network device 210 can also be a serving node (for example, an eNB, a Node B, an RNC, or a BSS).
  • the transceiver 2101 can be used to communicate with the outside, for example: receiving a measurement report reported by the UE to the neighboring cell, to the coordinator.
  • the memory 2102 is coupled to the processor 2103,
  • the memory 2102 is configured to store various programs and applications, and may also be used to store the acquired load information of the neighboring cell, etc.
  • the processor 2103 is configured to: according to the information received by the transceiver 2101, and call the program, application or other stored in the memory 2102. Data to implement functions such as handover decisions.
  • the network device 210 may also be a target node (for example, an eNB, a Node B, an RNC, or a BSS).
  • the transceiver 2101 may be configured to communicate with the outside, for example: receiving a handover request or a redirect request sent by the coordinator, to the coordinator Transmitting a handover request response or a redirect response, etc.;
  • the memory 2102 is coupled to the processor 2103, the memory 2102 is configured to store various programs and applications;
  • the processor 2103 is configured to receive information according to the transceiver 2101, and call the program stored in the memory 2102. Or the application implements functions such as redirect resource preparation.
  • processor 2103 may also be used to implement other functions of the service node, coordinator, and target node in the embodiment illustrated in Figures 2-14.
  • the embodiment of the present invention further provides a communication system, which may include: the service node 200 and the coordinatorl60 in the present invention; or
  • Service node 170 and coordinatorl92 or include:
  • the service node 200, the coordinatorl52, and the target node 180 or include: The service node 200, the coordinatorl62, and the target node 180; or include:
  • Service node 172, coordinatorl94, and target node 180 or include:
  • the monthly service node 202, the coordinator 190, and the target node 180 are The monthly service node 202, the coordinator 190, and the target node 180.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明实施例公开了一种切换方法，本发明实施例还公开了一种协调控制器、服务节点、目标节点及相应的通信系统。其中，所述方法包括：获取用户设备UE所在的服务小区的多个邻小区的测量结果；获取反应所述多个邻小区中至少一个邻小区的负荷情况的信息；根据所述多个邻小区的测量结果和反应所述多个邻小区中至少一个邻小区的负荷情况的信息进行切换判决。采用本发明，能够提高无线接入技术间切换的成功率。

Description

一种无线接入技术间切换方法、 相应设备及通信系统 技术领域
本发明涉及无线通信领域， 尤其涉及一种无线接入技术间切换方法、 相应 设备及通信系统。 背景技术
由于移动通信的飞速发展， 运营商需要给用户提供更为高速和丰富的业务。 在网络的演进和升级中， 可以预见， 在较长的时间范围内， 2G ( 2nd generation ) 网络（如： 全球移动通信系统 ( GSM, Globe system of mobile communications ), 增强型数据速率 GSM 演进系统 （ EDGE , Enhanced Data Rate for GSM Evolution ) ), 3G ( 3rd generation ) 网络（如： 宽带码分多址系统（WCDMA, Wideband Code Division Multiple Access ),时分同步码分多址系统（ TD-SCDMA, Time Division- Synchronous Code Division Multiple Access ) ), 以及长期演进系统 ( LTE, Long term evolution )将会处于共存的状态， 共同为用户提供良好的通 信服务质量。
用户设备 ( User Equipment, UE )或者移动台 （ Mobile Station, MS )在移 动的过程中， 可能会出现无线接入技术间切换（ inter-RAT handover ) , 例如， 从 LTE切换到通用移动通信系统 （UMTS , Universal Mobile Telecommunications System )0 例如， 如图 1A所示， 在多制式的系统中， GSM做较大的网络覆盖， 其内部署有 LTE网络做热点覆盖， 当 UE从 Celll边缘移动到 Cell2时， UE要 执行 inter-RAT切换。 参照图 1B , 以 LTE UE向 UMTS切换为例， 现有的一种 切换流程如下： 2.1 )服务小区配置测量配置给 UE; 2.2 ) UE把测得的邻小区的 测量结果上报给服务小区； 2.3 )服务小区执行切换判决以判断 UE切换到哪个 目标小区； 2.4 )月^务小区向核心网 MME ( Mobility Management Entity )发送切 换请求； 2.5 ) MME向目标服务 GPRS支持节点（ SGSN, Serving GPRS Support Node )转发重定向请求； 2.6 )目标 SGSN向无线网络控制器（ RNC, radio network controller )发送重定向请求； 2.7 ) RNC向目标 SGSN发送重定向响应； 2.8 ) 目 标 SGSN向服务 MME转发重定向响应； 2.9 )服务 MME向服务演进型基站（ eNB , evolved Node B )发送切换请求响应； 2.10 )服务 eNB向 UE发送 RRC连接重配； 之后 UE向目标小区发起接入。
在现有 inter-RAT切换中， 当用户设备或移动台发起切换时， 由服务节点做 切换判决， 但服务节点并不知晓其他制式的小区的资源利用情况， 仅能通过用 户设备或移动台上报的测量结果判断其他小区的信号质量。 在这种情况下， 当 目标小区的信号质量较好而负荷较重时， 切换到该目标小区的切换失败率较高。 发明内容
本发明实施例所要解决的技术问题在于， 提供一种 inter-RAT切换方法、 相 应设备 (包括协调控制器（coordinator ), 服务节点和目标节点）及通信系统， 本发明可提高 inter-RAT切换的成功率。
根据本发明实施例的第一方面， 本发明实施例提供了一种无线接入技术间 切换方法， 包括：
获取用户设备 UE所在的服务小区的多个邻小区的测量结果；
获取反应所述多个邻小区中至少一个邻小区的负荷情况的信息；
根据所述多个邻小区的测量结果和反应所述多个邻小区中至少一个邻小区 的负荷情况的信息进行切换判决。
根据本发明实施例的第二方面， 本发明实施例提供了一种无线接入技术间 切换方法， 包括：
在 UE所在服务小区的服务节点做出切换判决以确定目标小区后，
coordinator接收由所述服务节点发送的用于请求切换的资源准备的消息； 所述 coordinator向所述目标小区的目标节点发送用于请求所述目标节点为 重定向分配资源的消息， 并接收所述目标节点在为重定向分配资源后发送的用 于将重定向的资源分配结果通知所述 coordinator的消息；
所述 coordinator向所述服务节点发送用于将所述目标节点上的资源准备通 知所述服务节点的消息。
根据本发明实施例的第三方面， 本发明实施例提供了一种网络设备， 包括： 第一信息处理模块， 用于获取 UE所在服务小区的多个邻小区的测量结果； 第二信息处理模块， 用于获取反应所述多个邻小区中至少一个邻小区的负 荷情况的信息；
第一判决模块， 用于根据所述多个邻小区的测量结果和反应所述多个邻小 区中至少一个邻小区的负荷情况的信息进行切换判决。
根据本发明实施例的第四方面， 本发明实施例提供一种 coordinator, 包括： 第四接收模块， 用于接收由服务节点发送的用于请求切换的资源准备的消 息， 和所述目标节点在为重定向分配资源后发送的用于将重定向的资源分配结 果通知所述 coordinator的消息；
第五发送模块， 用于在所述第四接收模块接收到所述用于请求切换的资源 准备的消息后向所述目标节点发送用于请求所述目标节点为重定向分配资源的 消息， 以及用于在所述第四接收模块接收到所述用于将重定向的资源分配结果 通知所述 coordinator的消息后， 向所述服务节点发送用于将所述目标节点上的 资源准备通知所述服务节点的消息。
根据本发明实施例的第五方面， 本发明实施例提供一种 coordinator, 包括： 第五接收模块， 用于接收 UE所在服务小区的服务节点发送的第二切换通 知， 所述第二切换通知包含标识， 该标识用于通知所述 coordinator向所述服务 节点发送反应所述 UE所在的服务小区的多个邻小区中至少一个邻小区的负荷 情况的信息；
信息获取模块， 用于获取反应所述多个邻小区中至少一个邻小区的负荷情 况的信息；
第六发送模块， 用于向所述服务节点发送第二切换通知响应以便所述服务 节点确定切换向的目标节点， 所述第二切换通知响应包含反应所述多个邻小区 中至少一个邻小区的负荷情况的信息。
根据本发明实施例的第六方面， 本发明实施例提供一种服务节点， 包括： 第八发送模块， 用于向 coordinator发送第一切换通知以便所述 coordinator 确定切换向的目标节点， 所述第一切换通知包括所述服务节点所在的服务小区 的多个邻小区的测量结果；
第七接收模块， 用于接收所述 coordinator在确定所述目标节点后发送的第 一切换通知响应， 和 /或， 用于在所述 coordinator请求所述目标节点为重定向分 配资源并且所述目标节点将重定向的资源分配结果通知所述 coordinator后， 接 收所述 coordinator发送的用于将所述目标节点上的资源准备通知所述服务节点 的消息， 其中， 所述第一切换通知响应包含所述目标小区的标识。
根据本发明实施例的第七方面， 本发明实施例提供一种服务节点， 包括： 第八接收模块，用于接收由 UE上报的所述服务节点所在服务小区的多个邻 小区的测量结果；
第二判决模块， 用于根据所述多个邻小区的测量结果确定目标节点； 第九发送模块， 用于在所述第二判决模块确定所述目标节点后， 向 coordinator发送用于请求切换的资源准备的消息， 以便所述 coordinator请求所 述目标节点为重定向分配资源；
第九接收模块， 用于在所述目标节点将重定向的资源分配结果通知所述 coordinator后， 接收所述 coordinator发送的用于将所述目标节点上的资源准备 通知所述服务节点的消息。
根据本发明实施例的第八方面， 本发明实施例提供一种目标节点， 包括： 第十接收模块， 用于接收由 coordinator发送的用于请求所述目标节点为重 定向分配资源的消息；
处理模块， 用于在所述第十接收模块接收到所述 coordinator发送的用于请 求所述目标节点为重定向分配资源的消息后， 为重定向分配资源以为重定向做 资源准备；
第十发送模块， 用于将重定向的资源分配结果通知所述 coordinator
根据本发明实施例的第九方面， 本发明实施例提供一种通信系统， 该通信 系统包括：
本发明实施例的第七方面提供的服务节点、 本发明实施例的第四方面提供 的 coordinator和本发明实施例的第八方面提供的目标节点； 或者包括：
本发明实施例的第三方面提供的网络设备（此处的网络设备为服务节点）、 本发明实施例的第五方面提供的 coordinator和本发明实施例的第八方面提供的 目标节点； 或者包括：
本发明实施例的第六方面提供的服务节点、 本发明实施例的第三方面提供 的网络设备 (此处的网络设备为 coordinator )和本发明实施例的第八方面提供的 目标节点。
实施本发明实施例，具有如下有益效果： coordinator或服务节点综合邻小区 的信号质量和负荷信息执行切换判决可以提高 inter-RAT切换的成功率； 此外， 在通信系统中引入 coordinator进行相关消息的收发，使得 inter-RAT切换流程不 需要通过核心网， 从而节省了切换延时， 提高了切换成功率。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对实施 例或现有技术描述中所需要使用的附图作筒单地介绍， 显而易见地， 下面描述 中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付 出创造性劳动性的前提下， 还可以根据这些附图获得其他的附图。
图 1A是现有的一种多制式的网络覆盖图；
图 1B是现有的从 LTE切换至 UMTS的切换流程示意图；
图 2是根据本发明一个实施例的 inter-RAT切换方法的流程示意图； 图 3是根据本发明一个实施例的 inter-RAT切换方法的流程示意图； 图 4是根据本发明一个实施例的从 LTE切换至 UTRA的切换流程示意图； 图 5是根据本发明一个实施例的从 UTRA切换至 LTE的切换流程示意图； 图 6是根据本发明一个实施例的从 LTE切换至 GERAN的切换流程示意图； 图 7是根据本发明一个实施例的从 GERAN切换至 LTE的切换流程示意图； 图 8是根据本发明一个实施例的从 GERAN切换至 UTRA的切换流程示意 图；
图 9是根据本发明一个实施例的从 UTRA切换至 GERAN的切换流程示意 图；
图 10是根据本发明一个实施例的 inter-RAT切换方法的流程示意图； 图 11A是根据本发明一个实施例的 inter-RAT切换方法的流程示意图； 图 11B是一种以 eNB作为服务节点的 inter-RAT切换流程示意图； 图 12A是根据本发明一个实施例的 inter-RAT切换方法的流程示意图； 图 12B是一种以 eNB作为服务节点的 inter-RAT切换流程示意图； 图 13是根据本发明一个实施例的 inter-RAT切换方法的流程示意图； 图 14是根据本发明一个实施例的网络设备的结构示意图；
图 15A是根据本发明一个实施例的 coordinator的结构示意图；
图 15B是根据本发明一个实施例的 coordinator的结构示意图；
图 16A是根据本发明一个实施例的 coordinator的结构示意图；
图 16B是根据本发明一个实施例的 coordinator的结构示意图；
图 17A是根据本发明一个实施例的服务节点的结构示意图； 图 17B是根据本发明一个实施例的服务节点的结构示意图；
图 18是根据本发明一个实施例的目标节点的结构示意图；
图 19A是根据本发明一个实施例的 coordinator的结构示意图；
图 19B是根据本发明一个实施例的 coordinator的结构示意图；
图 19C是根据本发明一个实施例的 coordinator的结构示意图；
图 20A是根据本发明一个实施例的服务节点的结构示意图；
图 20B是根据本发明一个实施例的服务节点的结构示意图；
图 21是根据本发明一个实施例的网络设备的结构示意图。 具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行清 楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是 全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
在本发明的各个实施方式当中， UE包括终端（ terminal )、 MS、 收发机和客 户端 （client )等。
参照图 2, 图 2是根据本发明一个实施例的 inter-RAT切换方法的流程示意 图。 该方法包括：
S200: 获取 UE所在的服务小区的多个邻小区的测量结果；
S202: 获取反应所述多个邻小区中至少一个邻小区的负荷情况的信息； S204: 根据所述多个邻小区的测量结果和反应所述多个邻小区中至少一个 邻小区的负荷情况的信息进行切换判决。
在本实施例的一种实现方式中， UE所在的服务小区的服务节点可以直接接 收由 UE上报的测量报告从而获取所述测量结果，或者 coordinator接收由 UE发 送的包含测量结果的第一切换通知， 从而获得所述测量结果。
在本实施例的一种实现方式中， 反应所述多个邻小区中至少一个邻小区的 负荷情况的信息可以包括： 所述多个邻小区中至少一个邻小区的负荷信息和资 源剩余信息， 或者根据所述多个邻小区中至少一个邻小区的负荷信息和资源剩 余信息生成的目标小区列表。 coordinator可以周期性地获取多个邻小区中至少一 个邻小区的负荷信息和资源剩余信息 （例如， 所述至少一个邻小区周期性的向 coordinator上报其负荷情况相关信息）并存储（该存储可以是选择性的， 例如， coordinator 可以只存储负荷情况达到一个门限值的邻小区的负荷情况相关信 息）； coordinator也可在接收到服务节点发送的触发消息（例如，第二切换通知） 后， 向多个邻小区中至少一个邻小区获取其负荷信息和资源剩余信息； coordinator还可以根据获取的至少一个邻小区的负荷信息和资源剩余信息生成 目标小区列表（例如， coordinator选择负荷情况达到一个门限值的邻小区组成目 标小区列表）； 服务节点可以从 coordinator获取多个邻小区中至少一个邻小区的 负荷信息和资源剩余信息（在此基础上， 服务节点可以生成目标小区列表）， 或 者直接从 coordinator获取 coordinator生成的目标小区列表。
在本实施例的一种实现方式中， coordinator或服务节点可以根据多个邻小区 的测量结果确定多个邻小区的信号质量（包括： 信号强度)， 并通过以下方式进行 切换判决：
1 )选择出信号质量达到一个第一门限值、 同时负荷情况达到一个第二门限 值的至少一个邻小区， 然后随机选取其中的一个作为目标小区； 或
2)确定出负荷情况达到一个门限值的邻小区集合，然后选择其中信号质量最 佳的邻小区作为目标小区； 或
3 )确定出信号质量达到一个第一门限值的邻小区集合 A, 确定出负荷情况 达到一个第二门限值的邻小区集合 B (例如， 目标小区列表)， 然后取集合 A与集 合 B的交集， 并根据交集结果进行选取。
在本发明的一种实施例中， 可以利用 coordinator执行切换判决。 参照图 3 , 图 3是根据本发明一个实施例的 inter-RAT切换方法的流程示意图。该方法包括：
S300: coordinator接收由服务节点发送的第一切换通知，所述第一切换通知 包括 UE所在的服务小区的多个邻小区的测量结果；
S302: coordinator获取反应所述多个邻小区中至少一个邻小区的负荷情况的 信息；
S304: coordinator根据所述多个邻小区的测量结果和反应所述多个邻小区中 至少一个邻小区的负荷情况的信息确定目标小区。
其中，服务节点可以是 eNB、基站（ Node B )、 RNC或基站子系统（ Base station subsystem, BSS ), BSS包括基站收发信台 （ Base Transceiver Station, BTS )和 基站控制器（Base Station Controller, BSC ), 在本发明的各种方法、 设备中， BTS和 BSC也可以分别作为本发明的良务节点或目标节点。
下面结合几种具体的 inter-RAT切换流程示意图， 示例性的描述本发明实施 例的 inter-RAT切换方法。
一 ) 以 LTE切换至 UTRA ( Universal Telecommunication Radio Access ) 为 例 （参照图 4 ):
步骤 4.1: UE把测得的当前服务小区的邻小区的测量报告上报给服务小区 的月^务 eNB;
步骤 4.2: 服务 eNB向 coordinator发送第一切换通知， 该第一切换通知包 括 UE对多个邻小区的测量结果；
在不同的接入网间进行切换时， 测量结果可以包括以下信息中不同信息的 组合： 参考信号接收功率 (Reference Signal Received Power, RSRP)和 /或参考信 号接收质量（ Reference Signal Received Quality, RSRQ ), 以及 UTRA FDD公共 导频信道接收信号码域功率 (UTRA FDD CPICH RSCP)、 UTRA FDD载波接收信 号强度指示（ UTRA FDD carrier RSSI )、 UTRA FDD公共导频信道每码片信噪比 ( UTRA FDD CPICH Ec/No )、 GSM 载波接收信号强度指示 （GSM carrier RSSI )、 UTRA TDD载波接收信号强度指示（ UTRA TDD carrier RSSI )、 UTRA TDD主公共控制物理信道接收信号码域功率（UTRA TDD P-CCPCH RSCP )、 CDMA2000 lx无线传输技术导频强度 ( CDMA2000 lx RTT Pilot Strength )和 CDMA2000 高速分组数据导频强度（ CDMA2000 HRPD Pilot Strength )等。 例 如， 当从 LTE/UMTS/UTRA FDD/CDMA 2000切换至 UTRA TDD时， 测量结果 包括 UTRA TDD carrier RSSI 和 UTRA TDD P-CCPCH RSCP , 当从 LTE/UMTS/UTRA FDD/ UTRA TDD切换至 CDMA 2000时， 测量结果包括导频 强度信息等。 这些是本领域技术人员能够区分的， 此处不详述， 同样的道理， 在下文的图 4至图 9所示实施例中， 对于测量结果所包含的信息也是示例性列 举， 不进行详细划分和描述。
步骤 4.3: coordinator根据接收到的测量结果判断所述多个邻小区的信号质 量， 根据获取的反应多个邻小区中至少一个邻小区的负荷情况的信息判断所述 至少一个邻小区的负荷情况， 综合以上信息为 UE做切换判决， 决定切换向的目 标小区；
步骤 4.4: coordinator向服务 eNB发送第一切换通知响应， 其包括目标小区 的标识（例如： 目标小区的物理标识（ PCI, Physical Cell ID )或目标小区标识 ( CI, Cell ID ) );
之后的步骤（包括步骤 4.5至步骤 4.8 )可以采用公知技术， 此处不再详述。 二） 以 UTRA切换至 LTE为例 （参照图 5 ):
步骤 5.1: UE把测得的当前服务小区的邻小区的测量报告上报给服务小区 的服务 RNC;
步骤 5.2: 服务 RNC向 coordinator发送第一切换通知， 该第一切换通知包 括 UE对多个邻小区的测量结果，该测量结果可包括： UTRA FDD CPICH RSCP、 UTRA FDD carrier RSSL UTRA FDD CPICH Ec/No, UTRA TDD CPICH Ec/No , GSM carrier RSSL UTRA TDD carrier RSSL UTRA TDD P-CCPCH RSCP、 CDMA2000 lx RTT Pilot Strength和 CDMA2000 HRPD Pilot Strength。
步骤 5.3: coordinator根据接收到的测量结果判断所述多个邻小区的信号质 量， 根据获取的反应多个邻小区中至少一个邻小区的负荷情况的信息判断所述 至少一个邻小区的负荷情况， 综合以上信息为 UE做切换判决， 决定切换向的目 标小区；
步骤 5.4: coordinator向服务 RNC发送第一切换通知响应，其包括目标小区 的标识 (例如 PCI或 CI );
之后的步骤（包括步骤 5.5至步骤 5.7 )可以采用公知技术， 此处不再详述。 三 ) 以 LTE切换至 GERAN ( GSM EDGE Radio Access Network ) 为例 （参 照图 6 ):
步骤 6.1: UE把测得的当前服务小区的邻小区的测量报告上报给服务小区 的月^务 eNB;
步骤 6.2: 服务 eNB向 coordinator发送第一切换通知， 该第一切换通知包 括 UE对多个邻小区的测量结果， 该测量结果可包括： RSRP和 /或 RSRQ, 以及 UTRA FDD CPICH RSCP、 UTRA FDD carrier RSSI、 UTRA FDD CPICH Ec/No、 UTRA TDD CPICH Ec/No和 GSM carrier RSSI;
步骤 6.3: coordinator根据接收到的测量结果判断所述多个邻小区的信号质 量， 根据获取的反应多个邻小区中至少一个邻小区的负荷情况的信息判断所述 至少一个邻小区的负荷情况， 综合以上的信息为 UE做切换判决， 决定切换向的 目标小区； 步骤 6.4: coordinator向服务 eNB发送第一切换通知响应， 其包括目标小区 的标识 (例如 PCI或 CI );
之后的步骤（包括步骤 6.5至步骤 6.9 )可以采用公知技术， 此处不再详述。 四） 以 GERAN切换至 LTE为例 （参照图 7 ):
步骤 7.1: UE把测得的服务小区的邻小区的测量报告上报给服务小区的服 务 BSS;
步骤 7.2:服务 BSS向 coordinator发送第一切换通知，该第一切换通知包括 UE对多个邻小区的测量结果，该测量结果可包括： RSRP和 /或 RSRQ,以及 GSM carrier RSSL UTRA FDD CPICH RSCP、 UTRA FDD carrier RSSL UTRA FDD CPICH Ec/No和 UTRA TDD CPICH Ec/No;
步骤 7.3: coordinator根据接收到的测量结果判断所述多个邻小区的信号质 量， 根据获取的反应多个邻小区中至少一个邻小区的负荷情况的信息判断所述 至少一个邻小区的负荷情况， 综合以上信息为 UE做切换判决， 决定切换向的目 标小区；
步骤 7.4: coordinator向服务 BSS发送第一切换通知响应， 其包括目标小区 的标识 (例如 PCI或 CI );
之后的步骤（包括步骤 7.5至步骤 7.7 )可以采用公知技术， 此处不再详述。 五） 以 GERAN切换至 UTRA为例 （参照图 8 ):
步骤 8.1: MS把测得的服务小区的邻小区的测量报告上报给服务小区的服 务 BSS;
步骤 8.2:服务 BSS向 coordinator发送第一切换通知，该第一切换通知包括 MS对多个邻小区的测量结果， 该测量结果可包括： RSRP和 /或 RSRQ, 以及 UTRA FDD CPICH RSCP、 UTRA FDD carrier RSSI、 UTRA FDD CPICH Ec/No、 GSM carrier RSSL UTRA TDD carrier RSSI, TRA TDD P-CCPCH RSCP, CDMA2000 lx RTT Pilot Strength和 CDMA2000 HRPD Pilot Strength;
步骤 8.3: coordinator根据接收到的测量结果判断所述多个邻小区的信号质 量， 根据获取的反应多个邻小区中至少一个邻小区的负荷情况的信息判断所述 至少一个邻小区的负荷情况， 综合以上信息为 MS做切换判决， 决定切换向的 目标小区；
步骤 8.4: coordinator向服务 BSS发送第一切换通知响应， 其包括目标小区 的标识 (例如 PCI或 CI );
之后的步骤（包括步骤 8.5至步骤 8.9 )可以采用公知技术， 此处不再详述。 六） 以 UTRA切换至 GERAN为例 （参照图 9 ):
步骤 9.1: MS把测得的服务小区的邻小区的测量结果上报给服务小区的服 务 RNC;
步骤 9.2: 服务 RNC向 coordinator发送第一切换通知， 该第一切换通知包 括 MS对多个邻小区的测量结果， 该测量结果可包括 RSRP和 /或 RSRQ, 以及 UTRA FDD CPICH RSCP、 UTRA FDD carrier RSSI、 UTRA FDD CPICH Ec/No、 UTRA TDD CPICH Ec/No和 GSM carrier RSSI;
步骤 9.3: coordinator根据接收到的测量结果判断所述多个邻小区的信号质 量， 根据获取的反应多个邻小区中至少一个邻小区的负荷情况的信息判断所述 至少一个邻小区的负荷情况， 综合以上信息为 MS做切换判决， 决定切换向的 目标小区；
步骤 9.4: coordinator向服务 RNC发送第一切换通知响应，其包括目标小区 的标识 (例如 PCI或 CI );
之后的步骤（包括步骤 9.5至步骤 9.9 )可以采用公知技术， 此处不再详述。 在本发明的一种实施例中， 还可以利用服务节点执行切换判决。 参照图 10, 图 10是根据本发明一个实施例的 inter-RAT切换方法的流程示意图。 该方法包 括：
S1000: 服务节点接收 UE上报的该 UE所在的服务小区的多个邻小区的测 量结果；
S1002: 服务节点向 coordinator发送第二切换通知；
S1004: 服务节点接收 coordinator发送的第二切换通知响应， 所述第二切换 通知响应包括反应所述多个邻小区中至少一个邻小区的负荷情况的信息；
S1006: 服务节点进行切换判决， 具体地， 服务节点根据所述多个邻小区的 测量结果和反应所述多个邻小区中至少一个邻小区的负荷情况的信息确定目标 小区。
在本实施例的一种实现方式中， 第二切换通知用于通知 coordinator在服务 节点下的一个 UE要执行切换， 该第二切换通知包含标识， 该标识用于通知 coordinator 向当前服务小区发送反应多个邻小区中至少一个邻小区的负荷情况 的信息， 例如： 该标识可以以 flag表示， 当 flag为 0时， coordinator不需要向 当前服务小区发送邻小区负荷情况相关信息； 当 flag为 1时， coordinator向当前 服务小区发送反应所述至少一个邻小区的负荷情况的信息。 第二切换通知响应 可包括所述至少一个邻小区的负荷信息和资源剩余信息， 或包括根据所述至少 一个邻小区的负荷信息和资源剩余信息产生的目标小区列表。
其中， 服务节点可以是 eNB、 Node B、 RNC或 BSS。 下面结合几种具体的 inter-RAT切换流程， 示例性的描述本发明的 inter-RAT切换方法。
在 LTE切换至 UTRA的切换流程中：
步骤 1 : UE把测得的当前服务小区的邻小区的测量报告上报给服务小区的 服务 eNB;
步骤 2: 服务 eNB向 coordinator发送第二切换通知， 用于告知 coordinator 在服务 eNB下的一个 UE要执行切换， 第二切换通知包含标识， 该标识用于通 知 coordinator向服务小区发送反应多个邻小区中至少一个邻小区的负荷情况的 信息；
步骤 3: coordinator接收到第二切换通知后， 向服务 eNB发送第二切换通 知响应， 其可包括所述至少一个邻小区的负荷信息和资源剩余信息， 或包括 coordinator根据所述至少一个邻小区的负荷信息和资源剩余信息向服务节点推 荐的目标小区列表；
步骤 4: 服务 eNB根据接收的测量报告选择信号质量或信号强度较佳的目 标小区组 A, 然后根据 coordinator反馈的至少一个邻小区的负荷信息和资源剩 余信息选择负荷较轻的目标小区组 B (或者根据 coordinator推荐的目标小区列 表确定目标小区组 B ),将两个目标小区组做交集，从而选择切换向的目标小区； 之后的步骤可以采用公知技术， 此处不再详述。
在 UTRA切换至 LTE的切换流程中，服务 RNC接收 UE上报的测量报告并 与 coordinator进行信息交互； 在 LTE切换至 GERAN的切换流程中， 服务 eNB 接收 UE上报的测量报告并与 coordinator进行信息交互；在 GERAN切换至 LTE 的切换流程中， 服务 BSS接收 UE上报的测量报告并与 coordinator进行信息交 互； 在 GERAN切换至 UTRA的切换流程中， 服务 BSS接收 MS上报的测量报 告并与 coordinator进行信息交互； 在 UTRA切换至 GERAN的切换流程中， 服 务 RNC接收 MS 上报的测量报告并与 coordinator进行信息交互。 上述各种 inter-RAT切换中的具体信息交互流程及各个服务节点的切换判决处理请参照上 述 LTE切换至 UTRA的切换流程， 此处不再详述。
本发明的 inter-RAT切换方法利用 coordinator或服务节点进行切换判决，可 以综合当前服务小区的多个邻小区的信号质量和多个邻小区中至少一个邻小区 的负荷情况进行切换， 提高了 inter-RAT切换的成功率。
参照图 11A, 图 11A是根据本发明一个实施例的 inter-RAT切换方法的流程 示意图， 该方法包括：
SHOO: coordinator接收服务节点发送的第一切换通知， 所述第一切换通知 包括 UE所在的服务小区的多个邻小区的测量结果；
S1102: coordinator获取反应所述多个邻小区中至少一个邻小区的负荷情况 的信息；
S1104: coordinator根据所述多个邻小区的测量结果和反应所述多个邻小区 中至少一个邻小区的负荷情况的信息确定目标小区；
S1106: coordinator向目标小区的目标节点发送用于请求目标节点为重定向 分配资源的消息；
S1108: coordinator接收由目标节点在为重定向分配资源之后发送的用于将 重定向的资源分配结果通知 coordinator的消息；
S1110: coordinator向服务节点发送用于将目标节点上的资源准备通知服务 节点的消息。
其中， 对于步骤 S1100、 S1102和 S1104的说明请参照图 2和图 3以及图 4 至图 9所示实施例中相应步骤的说明， 此处不再详述。
本实施例中的服务节点包括： eNB、 Node B、 RNC或 BSS。 在本实施例的 一种实现方式中， 参照图 11B , 图 11B是一种以 eNB作为服务节点的 inter-RAT 切换流程示意图， 本实现方式实现了 LTE向 UTRA的切换， 其中的目标节点是 RNCo 具体地，
步骤 11.1 : 服务小区配置测量配置给 UE;
步骤 11.2: UE把测得的邻小区的测量报告上报给服务小区的服务 eNB; (步 骤 11.1和步骤 11.2可以采用现有技术）；
步骤 11.3: 服务 eNB向 coordinator发送第一切换通知， 所述第一切换通知 包括 UE所在服务小区的多个邻小区的测量结果； 步骤 11.4: coordinator执行切换判决确定目标 RNC,具体步骤请参照图 11A 中的步骤 S1102和步骤 S1104;
步骤 11.5: coordinator向目标 RNC发送用于请求目标 RNC为重定向分配 资源的切换请求， 该消息包括但不限于以下信息： UE标识（UE Identifier ), 原 因 （Cause )、 核心网域标识 ( CN Domain Indicator ), 一致性保护信息（Integrity protection information )、 力口密信息 ( Encryption information )、 无线接入承载建立 列表（ RAB to be setup list )、 CSG相关信息和源 RNC到目标 RNC的透明容器 ( Source RNC to Target RNC Transparent Container );
步骤 11.6: 目标 RNC为重定向分配资源后， 向 coordinator发送用于将重定 向的资源分配结果通知 coordinator的切换请求响应， 该消息可以包括但不限于 以下信息： 目标 RNC 到源 RNC 的透明容器 （Target RNC to Source RNC Transparent Container )、 无线接入 7 载建立列表 ( RABs setup list )和无线接入 载建立失败列表（ RABs failed to setup list );
步骤 11.7: coordinator向服务 eNB发送用于将目标 RNC上的资源准备通知 服务节点的切换命令， 该消息可以包括但不限于以下信息： 目标端到源端的透 明容器（ Target to Source Transparent Container )、无线接入？ 载释放列表（ E-RABs to Release List )和数据前传列表；
之后的步骤（包括 11.8 )可以采用现有技术， 此处不详述。
在本实施例的其他实现方式中， coordinator执行切换判决确定目标节点后， 向目标节点发送切换请求以请求目标节点为重定向分配资源； 目标节点在为重 定向分配资源后向 coordinator发送切换请求响应以将重定向的资源分配结果通 知 coordinator; coordinator向服务节点发送切换命令以将目标节点上的资源准备 通知服务节点。 其中，
一）当从 LTE切换至 GERAN/CDMA 2000时， 切换请求可以包括但不限于 以下信息： Cause, 目标小区标识（ Target Cell Identifier )、 欲建立的包流（ PFCs to be set-up list, 分组流上下文 ( Packet Flow Context, PFC ) )、 源 RNC到目标 BSS 的透明容器（ Source RNC to Target BSS Transparent Container )和非接入层 切换盒（ NAS container for handover );切换请求响应可以包括但不限于以下信息： Target to Source Transparent Container, SIAP十办议原因（ SIAP Cause )、 演进分组 系统承载建立列表 ( EPS ( Evolved Packet System ) Bearers setup list )和演进分 组系统 7 载建立失败列表（ EPS Bearers failed to setup list );切换命令可以包括但 不限于以下信息： Target to Source Transparent Container, E-RABs to Release List, 数据前传列表。
二）当从 UTRA切换至 LTE时， 切换请求可以包括但不限于以下信息： UE Identifier, SIAP Cause,加密相关参数和算法、非接入层安全参数（ NAS Security Parameters to E-UTRAN )、 演进网络系统承载列表 ( EPS Bearers to be setup list )、 CSG 相关信息和源端到目标端的透明容器 （ Source to Target Transparent Container ) ; 切换请求响应可以包括但不限于以下信息： Target to Source Transparent Container、 EPS Bearers setup list和 EPS Bearers failed to setup list; 切 换命令可以包括但不限于以下信息： 目标 RNC到源 RNC 的透明容器（Target RNC to Source RNC Transparent Container )、 RABs to be Released List和数据前传 列表。
三）当从 GERAN/CDMA 2000切换至 LTE时， 切换请求可以包括但不限于 以下信息： UE Identifier, SIAP Cause, 完整性保护相关参数和算法、 加密相关 参数和算法、承载建立歹1 J表 ( Bearers to be setup list )、 Source to Target Transparent Container和切换受限列表 ( Handover Restriction List ); 切换请求响应可以包括 但不限于以下信息： Target to Source Transparent Container、 SIAP Cause、 EPS Bearers setup list和 EPS Bearers failed to setup list;切换命令可以包括但不限于以 下信息： 临时逻辑链路标识 ( Temporary Logical Link Identity, TLLI )、 欲建立的 分组流上下文列表（ List of Set Up PFCs )、目标 RNC到源 BSS的透明容器（ Target RNC to Source BSS Transparent Container )和 Cause。
四）当从 UTRA切换至 GERAN/CDMA 2000时， 切换请求可以包括但不限 于以下信息： Cause、 Target Cell Identifier、源 BSS到目标 BSS的透明容器（ Source BSS to Target BSS Transparent Container )和 NAS container for handover; 切换请 求响应可以包括但不限于以下信息： 目标 BSS到源 BSS的透明容器（ Target BSS to Source BSS Transparent Container ); 切换命令可以包括但不限于以下信息： Target BSS to Source BSS Transparent Container ^ RABs to be Released List和数据 前传列表。
五）当从 GERAN/CDMA 2000切换至 UTRA时， 切换请求可以包括但不限 于以下信息： 永久非接入层标识 ( Permanent NAS Identity )、 Cause, CN Domain Indicator、 Integrity protection information、 力口密信息 ( Encryption information )、 RABs To Be Set Up List、 Source to Target Transparent Container和 Iu口信令连接 标识 ( Iu Signalling connection identifier ); 切换请求响应可以包括但不限于以下 信息： Source to Target Transparent Container ^ RABs setup list, 和 RABS failed to setup list; 切换命令可以包括但不限于以下信息： TLLI、 List of Set Up PFCs和 Source to Target Transparent Container。
参照图 12A,图 12A是根据本发明一个实施例的 inter-RAT切换方法的流程 示意图， 该方法包括：
S1200: coordinator接收服务节点发送的第一切换通知， 该第一切换通知包 括 UE所在的服务小区的多个邻小区的测量结果；
S1202: coordinator获取反应所述多个邻小区中至少一个邻小区的负荷情况 的信息；
S1204: coordinator根据所述多个邻小区的测量结果和反应所述多个邻小区 中至少一个邻小区的负荷情况的信息确定目标小区；
S1206: coordinator向服务节点发送第一切换通知响应， 所述第一切换通知 响应中包含目标小区的标识；
S1208: coordinator接收由服务节点发送的用于请求切换的资源准备的消息；
S1210: coordinator向目标节点发送用于请求目标节点为重定向分配资源的 消息；
S1212: coordinator接收目标节点在为重定向分配资源后发送的用于将重定 向的资源分配结果通知 coordinator的消息；
S1214: coordinator向服务节点发送用于将目标节点上的资源准备通知服务 节点的消息。
本实施例中的服务节点包括： eNB、 Node B、 RNC或 BSS。
其中，对于步骤 S1200至 S1206的说明请参照图 2和图 10所示实施例中的 相应说明， 此处不再详述。 对于步骤 S1208至步骤 S1214的说明请参照下文示 例性列举的六种实现方式中的相应说明。
在本实施例的一种实现方式中， 参照图 12B, 图 12B是一种以 eNB作为服 务节点的切换流程示意图，本实现方式实现了 LTE至 GERAN/CDMA 2000的切 换， 其中的目标节点是 BSS。 具体地， 步骤 12.1和步骤 12.2请参照图 11B中的相应描述；
步骤 12.3、步骤 12.4和步骤 12.5请参照图 12A中的步骤 1200至步骤 1206; 步骤 12.6: 服务 eNB向 coordinator发送用于请求切换的资源准备的切换要 求，该消息可包括但不限于以下信息： S 1 AP Cause、 目标系统标识（ Target System Identifier )和 Source to Target Transparent Container;
步骤 12.7: coordinator向目标 BSS发送用于请求目标 BSS为重定向分配资 源的切换请求，该消息包括但不限于以下信息： Cause、 Target Cell Identifier, PFCs to be set-up list、 Source RNC to Target BSS Transparent Container和 NAS container for handover;
步骤 12.8 : 目标 BSS 为重定向分配资源以为重定向^ 资源准备， 并向 coordinator发送用于将重定向的资源分配结果通知 coordinator的切换请求响应， 该消息可包括但不限于以下信息： Target to Source Transparent Container, S1AP Cause、 EPS Bearers setup list和 EPS Bearers failed to setup list;
步骤 12.9: coordinator向服务 eNB发送用于将目标 BSS上的资源准备通知 服务节点的切换要求响应， 该消息可包括但不限于以下信息： Target to Source Transparent Container ^ E-RABs to Release List和数据前传歹1 J表；
之后的步骤（包括步骤 13 )可以采用现有技术， 此处不详述。
在本实施例的其他实现方式中， 例如：
一）当从 LTE切换至 UTRA时，服务 eNB向 coordinator发送用于请求切换 的资源准备的切换请求，该消息可包括但不限于以下信息： Cause, 目标 RNC标 识（ Target RNC Identifier )、闭合用户群标识（ CSG ID )、 CSG接入模式（ CSG access mode )和 Source to Target Transparent Container; coordinator向目标 RNC发送用 于请求目标 RNC为重定向分配资源的重定向请求， 该消息可包括但不限于以下 信息： UE Identifier、 Cause、 CN Domain Indicator、 Integrity protection information、 Encryption information、 RAB to be setup list、 CSG相关信息和 Source RNC to Target RNC Transparent Container； 目标 RNC 在为重定向分配资源后向 coordinator发送用于将重定向的资源分配结果通知 coordinator的重定向请求响 应， 该消息可包括但不限于以下信息： Target RNC to Source RNC Transparent Container、 RABs setup list和 RABs failed to setup list; coordinator向月^务 eNB发 送用于将目标 RNC上的资源准备通知服务 eNB的切换请求响应，该消息可包括 但不限于： Target to Source Transparent Container、 E-RABs to Release List和数据 前传列表。
二） 当从 UTRA切换至 LTE时， 服务 RNC向 coordinator发送用于请求切 换的资源准备的重定向要求，该消息可包括但不限于以下信息： Cause,目标 eNB 标识（ Target eNB Identifier )、 CSG相关信息、源 RNC标识（ Source RNC Identifier ) 和 Source RNC to Target RNC Transparent Container; coordinator向目标 eNB发送 用于请求目标 eNB为重定向分配资源的切换请求， 该消息包括但不限于以下信 息： UE Identifier, S1AP Cause, 加密相关参数和算法、 NAS Security Parameters to E-UTRAN、 EPS Bearers to be setup list, CSG相关信息和 Source to Target Transparent Container; 目标 eNB在为重定向分配资源后向 coordinator发送用于 将重定向的资源分配结果通知 coordinator的切换请求响应， 该消息可包括但不 限于以下信息： Target to Source Transparent Container、 EPS Bearers setup list和 EPS Bearers failed to setup list; coordinator向服务 RNC发送用于将目标 eNB上 的资源准备通知服务 RNC的重定向要求响应，该消息可包括但不限于以下信息： Target RNC to Source RNC Transparent Container、 RABs to be Released List和数 据前传列表。
三） 当从 GERAN/CDMA 2000切换至 LTE时， 服务 BSS向 coordinator发 送用于请求切换的资源准备的切换要求， 该消息可包括但不限于： Cause、 源小 区标识（ Source Cell Identifier )、 Target eNB Identifier和源 BSS到目标 RNC的透 明容器( Source BSS to Target RNC Transparent Container ); coordinator向目标 eNB 发送用于请求目标 eNB为重定向分配资源的切换请求， 该消息可包括但不限于 以下信息： UE Identifier, S1AP Cause, 完整性保护相关参数和算法、 加密相关 参数和算法、 Bearers to be setup list、 Source to Target Transparent Container和 Handover Restriction List;目标 eNB在为重定向分配资源后向 coordinator发送用 于将重定向的资源分配结果通知 coordinator的切换请求响应， 该消息可包括但 不限于以下信息： Target to Source Transparent Container ^ S1AP Cause ^ EPS Bearers setup list和 EPS Bearers failed to setup list; coordinator向月良务 BSS发送用于^1目 标 eNB上的资源准备通知服务 BSS的切换要求响应， 该消息可包括但不限于以 下信息： TLLI、 List of Set Up PFCs、 Target RNC to Source BSS Transparent Container和 Gausc。 四） 当从 UTRA切换至 GERAN/CDMA 2000时， 服务 RNC向 coordinator 发送用于请求切换的资源准备的重定向要求， 该消息可包括但不限于以下信息： 重定向类型（ Relocation Type )、 Cause、源端标识（ Source ID )、目标端标识（ Target ID )和 Source BSS To Target BSS Transparent Container; coordinator向目标 BSS 发送用于请求目标 BSS为重定向分配资源的切换请求， 该消息可包括但不限于 以下信息： Cause、 Target Cell Identifier ^ Source BSS to Target BSS Transparent Container和 NAS container for handover; 目标 BSS在为重定向分配资源后向 coordinator发送用于将重定向的资源分配结果通知 coordinator的切换请求响应， 该消息可包括但不限于以下信息： Target BSS to Source BSS Transparent
RNC的重定向要求响应，该消息可包括但不限于以下信息： Target BSS to Source BSS Transparent Container, RABs to be Released List和数据前传列表。
五） 当从 GERAN/CDMA 2000切换至 UTRA时， 服务 BSS向 coordinator 发送用于请求切换的资源准备的切换要求， 该消息可包括但不限于以下信息： TLLL Cause、 源小区标识（ Source Cell Identifier )、 目标 RNC标识（ Target RNC Identifier )、 Source to Target Transparent Container 和活动的分组上下文歹1 J表
( Active PFCs List ); coordinator向目标 RNC发送用于请求目标 RNC为重定向 分配资源的重定向请求， 该消息可包括但不限于以下信息： Permanent NAS Identity、 Cause、 CN Domain Indicator、 Integrity protection information、 Encryption information、 RABs To Be Set Up List、 Source to Target Transparent Container和 Iu Signalling connection identifier; 目标 RNC在为重定向分配资源后向 coordinator 发送用于将重定向的资源分配结果通知 coordinator的重定向请求响应， 该消息 可包括但不限于以下信息： Source to Target Transparent Container ^ RABs setup list 和 RABS failed to setup list; coordinator向服务 BSS发送用于将目标 RNC上的 资源准备通知服务 BSS 的切换要求响应， 该消息可包括但不限于以下信息： TLLI、 List of Set Up PFCs和 Source to Target Transparent Container„
参照图 13 , 图 13是根据本发明一个实施例的 inter-RAT切换方法的流程示 意图， 该方法包括：
S1300: 在 UE所在服务小区的服务节点做出切换判决以确定目标小区后， coordinator接收由服务节点发送的用于请求切换的资源准备的消息； S1302: coordinator向目标小区的目标节点发送用于请求目标节点为重定向 分配资源的消息， 并接收目标节点在为重定向分配资源后发送的用于将重定向 的资源分配结果通知 coordinator的消息；
S1304: coordinator向服务节点发送用于将目标节点上的资源准备通知服务 节点的消息。
在本实施例的第一种实现方式中， UE所在服务小区的服务节点做出切换判 决以确定目标小区可以包括：月良务节点可以根据 UE上 >¾的多个邻小区的测量结 果确定所述多个邻小区的信号质量， 并选取所述多个邻小区中信号质量最好的 邻小区作为目标小区。
在本实施例的第二种实现方式中， UE所在服务小区的服务节点做出切换判 决以确定目标小区可以采用图 10所示实施例的方案。
本实施例中， 对于步骤 S1300至步骤 S1304的说明请参照图 12A所示实施 例中对步骤 S1208至步骤 S1214的说明， 此处不再详述。
本发明的 inter-RAT切换方法利用 coordinator, 服务节点以及目标节点进行 通信， 使得在切换过程中不需要通过核心网， 节省了切换延时， 提高切换成功 率。
参照图 14, 图 14是根据本发明一个实施例的网络设备的结构示意图， 该网 络设备 140包括：
第一信息处理模块 1402, 用于获取 UE所在的服务小区的多个邻小区的测 量结果；
第二信息处理模块 1404, 用于获取反应所述多个邻小区中至少一个邻小区 的负荷情况的信息；
第一判决模块 1406, 用于根据所述多个邻小区的测量结果和反应所述多个 邻小区中至少一个邻小区的负荷情况的信息进行切换判决。
其中， 反应所述多个邻小区中至少一个邻小区的负荷情况的信息包括： 所 述至少一个邻小区的负荷信息和资源剩余信息， 或包括根据所述至少一个邻小 区的负荷信息和资源剩余信息产生的目标小区列表。
本发明的网络设备 140可以是 coordinator或服务节点， 所述服务节点包括： eNB、 Node B、 RNC或 BSS。
在本实施例的一种实现方式中，网络设备 140(包括 coordinator或服务节点） 的第一判决模块 1406可以才艮据多个邻小区的测量结果确定多个邻小区的信号质 量 (包括： 信号强度)， 并通过以下方式进行切换判决：
1 )选择出信号质量达到一个第一门限值、 同时负荷情况达到一个第二门限 值的至少一个邻小区， 然后随机选取其中的一个作为目标小区； 或
2)确定出负荷情况达到一个门限值的邻小区集合，然后选择其中信号质量最 佳的邻小区作为目标小区； 或
3 )确定出信号质量达到一个第一门限值的邻小区集合 A, 确定出负荷情况 达到一个第二门限值的邻小区集合 B (例如， 目标小区列表)， 然后取集合 A与集 合 B的交集， 并根据交集结果进行选取。
参照图 15A,图 15A是根据本发明一个实施例的 coordinator的结构示意图， 该 coordinator 150包括：
第一信息处理模块 1502, 用于接收由 UE所在服务小区的服务节点发送的 第一切换通知，所述第一切换通知包括 UE所在的服务小区的多个邻小区的测量 结果；
第二信息处理模块 1504, 用于获取反应所述多个邻小区中至少一个邻小区 的负荷情况的信息；
第一判决模块 1506, 用于根据所述多个邻小区的测量结果和反应所述多个 邻小区中至少一个邻小区的负荷情况的信息确定目标小区。
其中，服务节点包括 eNB、 Node B、 RNC或 BSS。本实施例的 coordinator 150 可以用于执行图 3所示实施例中的 coordinator所执行的步骤。
在本实施例的一种实现方式中， 第二信息处理模块 1504周期性地获取多个 邻小区中至少一个邻小区的负荷信息和资源剩余信息 （例如， 所述至少一个邻 小区周期性的向 coordinator上报其负荷情况 )并存储（该存储可以是选择性的， 例如， coordinator可以只存储负荷情况达到一个门限值的邻小区的负荷情况相关 信息）； coordinator也可在接收到服务节点发送的触发消息 （例如， 第二切换通 知）后， 向多个邻小区中至少一个邻小区获取其负荷信息和资源剩余信息； coordinator还可以根据获取的至少一个邻小区的负荷信息和资源剩余信息生成 目标小区列表（例如， coordinator选择负荷情况达到一个门限值的邻小区组成目 标小区列表）。
对于第一判决模块 1506的说明请参照图 14所示实施例中对第一判决模块 1406的说明， 此处不再详述。
在本发明的另一个 coordinator实施例中， 参照图 15B , coordinatorl52包括 coordinatorl50的所有模块和功能， 同时还包括：
第一发送模块 1522, 用于向目标小区的目标节点发送用于请求目标节点为 重定向分配资源的消息， 例如， 切换请求；
第一接收模块 1524, 用于接收目标节点在为重定向分配资源后发送的用于 将重定向的资源分配结果通知 coordinator的消息， 例如， 切换请求响应；
第二发送模块 1526, 用于向服务节点发送用于将目标节点上的资源准备通 知服务节点的消息， 例如， 切换命令。
本实施例的 coordinatorl52可以用于执行图 11A所示实施例中的 coordinator 所执行的步骤。 其中， 目标节点包括 eNB、 Node B、 RNC或 BSS。 对于其中各 个消息的说明请参照图 11A所示实施例中的相应说明， 此处不再详述。
参照图 16A,图 16A是根据本发明一个实施例的 coordinator的结构示意图， 该 coordinatorl60包括： 第一信息处理模块 1602、 第二信息处理模块 1604、 第 一判决模块 1606和切换通知响应发送模块 1608。 其中，对于第一信息处理模块 1602、 第二信息处理模块 1604和第一判决模块 1606的说明请参照图 15A所示 实施例中对 coordinator 150的相应模块的说明。 切换通知响应发送模块 1608用 于向服务节点发送第一切换通知响应， 所述第一切换通知响应中包含目标小区 的标识（例如 PCI或 CI )。
本实施例的 coordinator 160 可以用于执行图 4 至图 9 所示实施例中的 coordinator所执行的步
在本发明的另一个 coordinator实施例中， 参照图 16B , coordinator 162包括 coordinator 160的所有模块和功能， 同时还包括：
第二接收模块 1622, 用于接收由服务节点发送的用于请求切换的资源准备 的消息， 和接收目标小区的目标节点在为重定向分配资源后发送的用于将重定 向的资源分配结果通知 coordinator的消息；
第三发送模块 1624, 用于向目标节点发送用于请求目标节点为重定向分配 资源的消息， 和向服务节点发送用于将目标节点上的资源准备通知服务节点的 消息。
本实施例的 coordinator 160可以用于执行图 12A所示实施例中的 coordinator 所执行的步骤。 其中， 目标节点包括 eNB、 Node B、 RNC或 BSS; 服务节点包 括 eNB、 Node B、 RNC或 BSS。
参照图 17A, 图 17A是根据本发明的一个实施例的服务节点的结构示意图。 该服务节点 170包括：
第一信息处理模块 1702,用于接收 UE上报的 UE所在服务小区的多个邻小 区的测量结果；
第二信息处理模块 1704 , 用于向 coordinator发送第二切换通知并接收 coordinator发送的第二切换通知响应，所述第二切换通知响应包括反应所述多个 邻小区中至少一个邻小区的负荷情况的信息；
第一判决模块 1706, 用于根据所述多个邻小区的测量结果和反应所述多个 邻小区中至少一个邻小区的负荷情况的信息确定目标小区。
其中， 第二信息处理模块 1704可以包括第一子模块 la和第二子模块 2a。 第一子模块 la用于向 coordinator发送第二切换通知； 第二子模块 2a用于接收 coordinator发送的第二切换通知响应，该第二切换通知响应包含反应所述多个邻 小区中至少一个邻小区的负荷情况的信息。
其中， 服务节点 170可以是 eNB、 Node B、 RNC或 BSS。 第二切换通知包 含标识， 该标识用于通知 coordinator向 良务节点发送反应所述至少一个邻小区 的负荷情况的信息。 例如： 该标识可以以 flag表示， 当 flag为 0时， coordinator 不需要向当前服务小区发送反应所述至少一个邻小区的负荷情况的信息；当 flag 为 1时， coordinator向当前服务小区发送反应所述至少一个邻小区的负荷情况的 信息。 第二切换通知响应可包括所述至少一个邻小区的负荷信息和资源剩余信 息， 或根据所述至少一个邻小区的负荷信息和资源剩余信息产生的目标小区列 表。
本实施例的服务节点 170可以用于执行图 10所示实施例中的服务节点所执 行的步骤。
本发明的另一个实施例中， 参照图 17B, 服务节点 172 包括服务节点 170 的所有模块及功能， 同时还包括：
第四发送模块 1722, 用于向 coordinator发送用于请求切换的资源准备的消 息， 以便 coordinator请求目标小区的目标节点为重定向分配资源。；
第三接收模块 1724 , 用于在目标节点将重定向的资源分配结果通知 coordinator后， 接收 coordinator发送的用于将目标节点上的资源准备通知服务 节点的消息。
本实施例的服务节点 172可以用于执行图 12A所示实施例中的服务节点所 执行的步骤。
本发明提供的 coordinator和服务节点可以根据邻小区的信号质量及负荷情 况相关信息进行切换判决， 提高切换成功率。
参照图 18, 图 18是根据本发明一个实施例的目标节点的结构示意图， 该目 标节点 180包括： 第十接收模块 1802、 处理模块 1804和第十发送模块 1806。 其中， 第十接收模块 1802用于接收由 coordinator发送的用于请求目标节点为重 定向分配资源的消息； 处理模块 1804 用于在第十接收模块 1802 接收到 coordinator发送的用于请求目标节点为重定向分配资源的消息后，为重定向分配 资源以为重定向做资源准备； 第十发送模块 1806, 用于将重定向的资源分配结 果通知 coordinator
本实施例的目标节点 180可以用于实现图 11A、 图 12A或图 13所示实施例 中的目标节点的功能。 该目标节点 180可以是 eNB、 Node B、 RNC或 BSS。
参照图 19A,图 19A是根据本发明一种实施例的 coordinator的结构示意图， 该 coordinator 190包括：
第四接收模块 1902, 用于接收由服务节点发送的用于请求切换的资源准备 的消息， 和由目标节点在为重定向分配资源后发送的用于将重定向的资源分配 结果通知 coordinator的消息；
第五发送模块 1904,用于在第四接收模块 1902接收到用于请求切换的资源 准备的消息后向目标节点发送用于请求目标节点为重定向分配资源的消息， 以 及用于在第四接收模块 1902 接收到用于将重定向的资源分配结果通知 coordinator 的消息后向服务节点发送用于将目标节点上的资源准备通知服务节 点的消息。
本实施例的 coordinator 190可以用于执行图 13所示实施例中的 coordinator 所执行的步骤。
参照图 19B, 图 19B是根据本发明一种实施例的 coordinator的结构示意图， 该 coordinator 192包括：
第五接收模块 1922, 用于接收 UE所在服务小区的服务节点发送的第二切 换通知， 所述第二切换通知包含标识， 该标识用于通知 coordinator向服务节点 发送反应 UE所在的服务小区的多个邻小区中至少一个邻小区的负荷情况的信 信息获耳 ^莫块 1924, 用于获取反应所述多个邻小区中至少一个邻小区的负 荷情况的信息；
第六发送模块 1926, 用于向服务节点发送第二切换通知响应以便服务节点 确定切换向的目标节点， 所述第二切换通知响应包含反应所述多个邻小区中至 少一个邻小区的负荷情况的信息。
本实施例的 coordinator 192可以用于执行图 10所示实施例中的 coordinator 所执行的步骤。
参照图 19C, 图 19C是根据本发明一种实施例的 coordinator的结构示意图， 该 coordinatorl94包括图 19B所示实施例中的所有模块及功能， 以及：
第六接收模块 1942, 用于接收由服务节点发送的用于请求切换的资源准备 的消息， 和目标节点在为重定向分配资源后发送的用于将重定向的资源分配结 果通知 coordinator的消息；
第七发送模块 1944,用于在第六接收模块 1942接收到用于请求切换的资源 准备的消息后， 向目标节点发送用于请求目标节点为重定向分配资源的消息， 以及用于在第六接收模块 1942 接收到用于将重定向的资源分配结果通知 coordinator 的消息后向服务节点发送用于将目标节点上的资源准备通知服务节 点的消息。
本实施例的 coordinator 194可以用于执行图 12A所示实施例中的 coordinator 所执行的步骤。
参照图 20A, 图 20A是根据本发明一种实施例的服务节点的结构示意图， 该服务节点 200包括： 第八发送模块 2002和第七接收模块 2004。 其中，
第八发送模块 2002用于向 coordinator发送第一切换通知（该第一切换通知 包括服务节点所在的服务小区的多个邻小区的测量结果） 以便 coordinator确定 切换向的目标节点， 第七接收模块 2004用于接收 coordinator发送的用于将目标 节点上的资源准备通知服务节点的消息（例如， 切换命令）。 在这种情况下， 服 务节点 200可以用于执行图 11A所示实施例中的服务节点所执行的步骤， 并且 月良务节点 200可以与上文所述的 coordinatorl52和目标节点 180构成通信系统。 或者， 第八发送模块 2002用于向 coordinator发送第一切换通知（该第一切 换通知包括服务节点所在的服务小区的多个邻小区的测量结果）以便 coordinator 确定切换向的目标节点， 第七接收模块 2004用于接收 coordinator在确定目标节 点后发送的第一切换通知响应， 所述第一切换通知响应包括目标小区的标识； 此时， 服务节点 200除了可以采用现有技术进行后续的信令传输（这种情况下， 通信系统可以包括月良务节点 200和上文所述的 coordinatorl60 )外， 也可以进行 以下操作： 第八发送模块 2002向 coordinator发送用于请求切换的资源准备的消 息以便 coordinator请求目标节点为重定向分配资源； 第七接收模块 2004接收 coordinator发送的用于将目标节点上的资源准备通知服务节点的消息。在这种情 况下， 服务节点 200可以用于执行图 12A所示实施例中的服务节点所执行的步 骤， 并且可以与上文所述的 coordinator 162和目标节点 180构成通信系统。
参照图 20B , 图 20B是根据本发明一种实施例的服务节点的结构示意图， 该服务节点 202包括：
第八接收模块 2022,用于接收由 UE上报的 UE所在服务小区的多个邻小区 的测量结果；
第二判决模块 2024,用于根据 UE上报的该 UE所在服务小区（即服务节点 202所在的服务小区） 的多个邻小区的测量结果进行切换判决以确定目标节点； 第九发送模块 2026 , 用于在第二判决模块 2024 确定目标节点后， 向 coordinator发送用于请求切换的资源准备的消息（例如， 图 13所示实施例中的 切换请求）， 以便 coordinator请求目标节点为重定向分配资源；
第九接收模块 2028 , 用于在目标节点将重定向的资源分配结果通知 coordinator后， 接收由 coordinator发送的用于将目标节点上的资源准备通知服 务节点的消息（例如， 图 13所示实施例中的切换命令）。 这种情况下， 服务节 点 202可以用于执行图 13所示实施例的第一种实现方式中的服务节点所执行的 步骤， 并且与上文所述的 coordinatorl90和目标节点 180构成通信系统。
图 20A中的服务节点 200和图 20B中的服务节点 202可以是 eNB、 Node B、 RNC或 BSS。
对于图 18、 图 19A、 图 19B、 图 19C、 图 20A和图 20B所示实施例中各个 消息的说明请参照图 11A和图 12A所示实施例中的相应说明。
图 21是本发明一个实施例的网络设备的结构示意图，该网络设备 210包括： 收发器 2101 , 存储器 2102和处理器 2103。 具体地，
该网络设备 210可以是 coordinator, 此时， 收发器 2101可以用于与外部进 行通信， 例如： 接收服务节点发送的第一切换通知或第二切换通知、 获取邻小 区的负荷信息、 向服务节点发送第一切换通知响应或第二切换通知响应， 接收 服务节点发送的切换请求并向目标节点发送重定向请求， 接收目标节点发送的 重定向请求响应并向服务节点发送切换请求响应、 向服务节点发送切换命令等 等； 存储器 2102与处理器 2103耦合， 存储器 2102用于存储各种程序与应用， 还可以用于存储获取的邻小区的负荷信息等；处理器 2103用于根据收发器 2101 接收到的信息， 并调用存储器 2102存储的程序、 应用或其他数据以实现切换判 决等功能。
该网络设备 210还可以是服务节点 （例如 eNB、 Node B、 RNC或 BSS ), 此时， 收发器 2101可以用于与外部进行通信， 例如： 接收 UE上报的对邻小区 的测量报告、向 coordinator发送第一切换通知或第二切换通知、接收 coordinator 发送的第一切换通知响应或第二切换通知响应， 向 coordinator发送切换请求并 接收 coordinator发送的切换请求响应等； 存储器 2102与处理器 2103耦合， 存 储器 2102用于存储各种程序与应用， 还可以用于存储获取的邻小区的负荷信息 等； 处理器 2103用于根据收发器 2101接收到的信息， 并调用存储器 2102存储 的程序、 应用或其他数据以实现切换判决等功能。
该网络设备 210还可以是目标节点 （例如 eNB、 Node B、 RNC或 BSS ), 此时， 收发器 2101可以用于与外部进行通信， 例如： 接收 coordinator发送的切 换请求或重定向请求、 向 coordinator发送切换请求响应或重定向响应等； 存储 器 2102与处理器 2103耦合,存储器 2102用于存储各种程序与应用；处理器 2103 用于根据收发器 2101接收到的信息， 并调用存储器 2102存储的程序或应用实 现重定向资源准备等功能。
在网络设备 210中， 处理器 2103还可用于实现图 2至图 14所示实施例中 的服务节点、 coordinator和目标节点的其他功能。
本发明实施例还提供一种通信系统， 该通信系统可以包括本发明中的： 服务节点 200和 coordinatorl60; 或者包括：
服务节点 170和 coordinatorl92; 或者包括：
服务节点 200、 coordinatorl52和目标节点 180; 或者包括： 服务节点 200、 coordinatorl62和目标节点 180; 或者包括：
服务节点 172、 coordinatorl94和目标节点 180; 或者包括：
月良务节点 202、 coordinator 190和目标节点 180。
对于通信系统中各个设备的描述， 以及各个设备间信令交互的步骤请参照 上文的设备实施例和方法实施例中的相应描述， 此处不再详述。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程， 是可以通过计算机程序来指令相关的硬件来完成， 所述的程序可存储于一计算 机可读取存储介质中， 该程序在执行时， 可包括如上述各方法的实施例的流程。 其中， 所述的存储介质可为磁碟、 光盘、 只读存储记忆体（Read-Only Memory, ROM )或随机存储记忆体（Random Access Memory, RAM )等。
以上所揭露的仅为本发明一种较佳实施例而已， 当然不能以此来限定本发 明之权利范围， 因此依本发明权利要求所作的等同变化， 仍属本发明所涵盖的 范围。

Claims

权 利 要 求
1、 一种无线接入技术间切换方法， 其特征在于， 该方法包括：
获取用户设备 UE所在的服务小区的多个邻小区的测量结果；
获取反应所述多个邻小区中至少一个邻小区的负荷情况的信息；
根据所述多个邻小区的测量结果和反应所述多个邻小区中至少一个邻小区 的负荷情况的信息进行切换判决。
2、 如权利要求 1所述方法， 其特征在于，
所述获取用户设备 UE所在的服务小区的多个邻小区的测量结果包括： 协调控制器接收由服务节点发送的第一切换通知， 所述第一切换通知包括 所述 UE所在的服务小区的多个邻小区的测量结果；
所述获取反应所述多个邻小区中至少一个邻小区的负荷情况的信息包括： 所述协调控制器获取反应所述多个邻小区中至少一个邻小区的负荷情况的 信息；
所述根据所述多个邻小区的测量结果和反应所述多个邻小区中至少一个邻 小区的负荷情况的信息进行切换判决包括：
所述协调控制器根据所述多个邻小区的测量结果和反应所述多个邻小区中 至少一个邻小区的负荷情况的信息确定目标小区。
3、 如权利要求 2所述方法， 其特征在于， 所述方法还包括：
所述协调控制器向所述服务节点发送第一切换通知响应， 所述第一切换通 知响应包含所述目标小区的标识。
4、 如权利要求 2所述方法， 其特征在于， 所述方法还包括：
所述协调控制器向所述目标小区的目标节点发送用于请求所述目标节点为 重定向分配资源的消息；
所述协调控制器接收所述目标节点在为重定向分配资源之后发送的用于将 重定向的资源分配结果通知所述协调控制器的消息；
所述协调控制器向所述服务节点发送用于将所述目标节点上的资源准备通 知所述服务节点的消息。
5、 如权利要求 1所述方法， 其特征在于，
所述获取用户设备 UE所在的服务小区的多个邻小区的测量结果包括： 服务节点接收所述 UE上报的所述 UE所在的服务小区的多个邻小区的测量 结果；
所述获取反应所述多个邻小区中至少一个邻小区的负荷情况的信息包括： 所述服务节点向所述协调控制器发送第二切换通知；
所述服务节点接收所述协调控制器发送的第二切换通知响应， 所述第二切 换通知响应包括反应所述多个邻小区中至少一个邻小区的负荷情况的信息； 所述根据所述多个邻小区的测量结果和反应所述多个邻小区中至少一个邻 小区的负荷情况的信息进行切换判决包括：
所述服务节点根据所述多个邻小区的测量结果和反应所述多个邻小区中至 少一个邻小区的负荷情况的信息确定目标小区。
6、 如权利要求 5所述方法， 其特征在于，
所述第二切换通知包含标识， 该标识用于通知所述协调控制器向所述服务 节点发送反应所述多个邻小区中至少一个邻小区的负荷情况的信息。
7、 如权利要求 3或 5或 6所述方法， 其特征在于， 所述方法还包括： 所述协调控制器接收由所述服务节点发送的用于请求切换的资源准备的消 息；
所述协调控制器向所述目标小区的目标节点发送用于请求所述目标节点为 重定向分配资源的消息；
所述协调控制器接收所述目标节点在为重定向分配资源后发送的用于将重 定向的资源分配结果通知所述协调控制器的消息；
所述协调控制器向所述服务节点发送用于将所述目标节点上的资源准备通 知所述服务节点的消息。
8、 如权利要求 1至 7中任意一项所述方法， 其特征在于， 所述服务节点包 括 eNB、 Node B、 RNC或 BSS。
9、 如权利要求 1至 7中任意一项所述方法， 其特征在于， 所述目标节点包 括 eNB、 Node B、 RNC或 BSS。
10、 如权利要求 1至 9中任意一项所述方法， 其特征在于， 所述反应所述 多个邻小区中至少一个邻小区的负荷情况的信息包括：
所述至少一个邻小区的负荷信息和资源剩余信息； 或
根据所述至少一个邻小区的负荷信息和资源剩余信息产生的目标小区列 表。
11、 一种无线接入技术间切换方法， 其特征在于， 所述方法包括： 在 UE所在服务小区的服务节点做出切换判决以确定目标小区后， 协调控制器接收由所述服务节点发送的用于请求切换的资源准备的消息； 所述协调控制器向所述目标小区的目标节点发送用于请求所述目标节点为 重定向分配资源的消息， 并接收所述目标节点在为重定向分配资源后发送的用 于将重定向的资源分配结果通知所述协调控制器的消息；
所述协调控制器向所述服务节点发送用于将所述目标节点上的资源准备通 知所述服务节点的消息。
12、如权利要求 11所述方法， 其特征在于，所述服务节点包括： eNB、 Node B、 RNC或 BSS。
13、如权利要求 11所述方法， 其特征在于，所述目标节点包括： eNB、 Node B、 RNC或 BSS。
14、 一种网络设备， 其特征在于， 该网络设备包括：
第一信息处理模块， 用于获取 UE所在服务小区的多个邻小区的测量结果； 第二信息处理模块， 用于获取反应所述多个邻小区中至少一个邻小区的负 荷情况的信息； 第一判决模块， 用于根据所述多个邻小区的测量结果和反应所述多个邻小 区中至少一个邻小区的负荷情况的信息进行切换判决。
15、 如权利要求 14所述网络设备， 其特征在于，
所述网络设备为协调控制器；
所述第一信息处理模块， 用于接收由服务节点发送的第一切换通知， 所述 第一切换通知包括所述 UE所在的服务小区的多个邻小区的测量结果；
所述第二信息处理模块， 用于获取反应所述多个邻小区中至少一个邻小区 的负荷情况的信息；
所述第一判决模块， 用于根据所述多个邻小区的测量结果和反应所述多个 邻小区中至少一个邻小区的负荷情况的信息确定目标小区。
16、 如权利要求 15所述网络设备， 其特征在于， 所述协调控制器还包括： 切换通知响应发送模块， 用于向所述服务节点发送第一切换通知响应， 所 述第一切换通知响应中包含所述目标小区的标识。
17、 如权利要求 15所述网络设备， 其特征在于， 所述协调控制器还包括： 第一发送模块， 用于向所述目标小区的目标节点发送用于请求所述目标节 点为重定向分配资源的消息；
第一接收模块， 用于接收所述目标节点在为重定向分配资源后发送的用于 将重定向的资源分配结果通知所述协调控制器的消息；
第二发送模块， 用于向所述服务节点发送用于将所述目标节点上的资源准 备通知所述服务节点的消息。
18、 如权利要求 16所述网络设备， 其特征在于， 所述协调控制器还包括： 第二接收模块， 用于接收由所述服务节点发送的用于请求切换的资源准备 的消息， 和接收所述目标小区的目标节点在为重定向分配资源后发送的用于将 重定向的资源分配结果通知所述协调控制器的消息；
第三发送模块， 用于向所述目标节点发送用于请求所述目标节点为重定向 分配资源的消息， 和向所述服务节点发送用于将所述目标节点上的资源准备通 知所述服务节点的消息。
19、 如权利要求 14所述网络设备， 其特征在于，
所述网络设备为服务节点；
所述第一信息处理模块，用于接收所述 UE上报的所述 UE所在的服务小区 的多个邻小区的测量结果；
所述第二信息处理模块， 用于向所述协调控制器发送第二切换通知和接收 所述协调控制器发送的第二切换通知响应， 所述第二切换通知响应包括反应所 述多个邻小区中至少一个邻小区的负荷情况的信息；
所述第一判决模块， 用于根据所述多个邻小区的测量结果和反应所述多个 邻小区中至少一个邻小区的负荷情况的信息确定目标小区。
20、 如权利要求 19所述网络设备， 其特征在于， 所述第二切换通知包含标 识， 该标识用于通知所述协调控制器向所述服务节点发送反应所述多个邻小区 中至少一个邻小区的负荷情况的信息。
21、 如权利要求 19或 20所述网络设备， 其特征在于， 所述服务节点还包 括：
第四发送模块， 用于向所述协调控制器发送用于请求切换的资源准备的消 息， 以便所述协调控制器请求所述目标小区的目标节点为重定向分配资源； 第三接收模块， 用于接收在所述目标节点将重定向的资源分配结果通知所 述协调控制器后， 所述协调控制器发送的用于将所述目标节点上的资源准备通 知所述服务节点的消息。
22、 如权利要求 14至 21 中任意一项所述网络装置， 其特征在于， 所述服 务节点包括 eNB、 Node B、 RNC或 BSS。
23、 如权利要求 14至 21 中任意一项所述网络装置， 其特征在于， 所述目 标节点包括 eNB、 Node B、 RNC或 BSS。
24、 如权利要求 14至 23中任意一项所述网络装置， 其特征在于， 所述反 应所述多个邻小区中至少一个邻小区的负荷情况的信息包括：
所述至少一个邻小区的负荷信息和资源剩余信息； 或
根据所述至少一个邻小区的负荷信息和资源剩余信息产生的目标小区列 表。
25、 一种协调控制器， 其特征在于， 所述协调控制器包括：
第四接收模块， 用于接收由服务节点发送的用于请求切换的资源准备的消 息， 和所述目标节点在为重定向分配资源后发送的用于将重定向的资源分配结 果通知所述协调控制器的消息；
第五发送模块， 用于在所述第四接收模块接收到所述用于请求切换的资源 准备的消息后向所述目标节点发送用于请求所述目标节点为重定向分配资源的 消息， 以及用于在所述第四接收模块接收到所述用于将重定向的资源分配结果 通知所述协调控制器的消息后， 向所述服务节点发送用于将所述目标节点上的 资源准备通知所述服务节点的消息。
26、 一种协调控制器， 其特征在于， 所述协调控制器包括：
第五接收模块， 用于接收 UE所在服务小区的服务节点发送的第二切换通 知， 所述第二切换通知包含标识， 该标识用于通知所述协调控制器向所述服务 节点发送反应所述 UE所在的服务小区的多个邻小区中至少一个邻小区的负荷 情况的信息；
信息获取模块， 用于获取反应所述多个邻小区中至少一个邻小区的负荷情 况的信息；
第六发送模块， 用于向所述服务节点发送第二切换通知响应以便所述服务 节点确定切换向的目标节点， 所述第二切换通知响应包含反应所述多个邻小区 中至少一个邻小区的负荷情况的信息。
27、如权利要求 26所述协调控制器， 其特征在于， 所述协调控制器还包括： 第六接收模块， 用于接收由所述服务节点发送的用于请求切换的资源准备 的消息， 和所述目标节点在为重定向分配资源后发送的用于将重定向的资源分 配结果通知所述协调控制器的消息；
第七发送模块， 用于在所述第六接收模块接收到所述用于请求切换的资源 准备的消息后， 向所述目标节点发送用于请求所述目标节点为重定向分配资源 的消息， 以及用于在所述第六接收模块接收到所述用于将重定向的资源分配结 果通知所述协调控制器的消息后向所述服务节点发送用于将所述目标节点上的 资源准备通知所述服务节点的消息。
28、 一种服务节点， 其特征在于， 该服务节点包括：
第八发送模块， 用于向协调控制器发送第一切换通知以便所述协调控制器 确定切换向的目标节点， 所述第一切换通知包括所述服务节点所在的服务小区 的多个邻小区的测量结果；
第七接收模块， 用于接收所述协调控制器在确定所述目标节点后发送的第 一切换通知响应， 和 /或， 用于在所述协调控制器请求所述目标节点为重定向分 配资源并且所述目标节点将重定向的资源分配结果通知所述协调控制器后， 接 收所述协调控制器发送的用于将所述目标节点上的资源准备通知所述服务节点 的消息， 其中， 所述第一切换通知响应包含所述目标小区的标识。
29、 如权利要求 28所述的服务节点， 其特征在于， 所述第八发送模块还用 于： 在所述第七接收模块接收到所述第一切换通知响应后， 向所述协调控制器 发送用于请求切换的资源准备的消息， 以便所述协调控制器请求所述目标节点 为重定向分配资源。
30、 一种服务节点， 其特征在于， 所述服务节点包括：
第八接收模块，用于接收由 UE上报的所述服务节点所在服务小区的多个邻 小区的测量结果；
第二判决模块， 用于根据所述多个邻小区的测量结果确定目标节点； 第九发送模块， 用于在所述第二判决模块确定所述目标节点后， 向协调控 制器发送用于请求切换的资源准备的消息， 以便所述协调控制器请求所述目标 节点为重定向分配资源；
第九接收模块， 用于在所述目标节点将重定向的资源分配结果通知所述协 调控制器后， 接收所述协调控制器发送的用于将所述目标节点上的资源准备通 知所述服务节点的消息。
31、 一种目标节点， 其特征在于， 所述目标节点包括：
第十接收模块， 用于接收由协调控制器发送的用于请求所述目标节点为重 定向分配资源的消息；
处理模块， 用于在所述第十接收模块接收到所述协调控制器发送的用于请 求所述目标节点为重定向分配资源的消息后， 为重定向分配资源以为重定向做 资源准备；
第十发送模块， 用于将重定向的资源分配结果通知所述协调控制器。
32、 一种通信系统， 其特征在于， 所述通信系统包括：
如权利要求 30所述的服务节点、 如权利要求 25所述的协调控制器和如权 利要求 31所述的目标节点；
或者， 所述通信系统包括：
如权利要求 21所述的服务节点、 如权利要求 27所述的协调控制器和如权 利要求 31所述的目标节点；
或者， 所述通信系统包括：
如权利要求 29所述的服务节点、 如权利要求 18所述的协调控制器和如权 利要求 31所述的目标节点。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11228931B2 (en) * 2018-08-10 2022-01-18 Qualcomm Incorporated On-demand physical layer reporting by a UE

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103686673B (zh) 2012-09-21 2019-06-04 北京三星通信技术研究有限公司 一种支持指示失败事件给源接入系统的方法
CN103841612B (zh) 2012-11-22 2017-12-01 华为技术有限公司 移动终端切换基站的方法及装置
CN104041177A (zh) * 2012-12-03 2014-09-10 华为技术有限公司 无线接入网信息获取方法和无线接入网控制器
WO2014098506A1 (ko) * 2012-12-19 2014-06-26 엘지전자 주식회사 다중 액세스 네트워크를 지원하는 무선 통신 시스템에서 통신 방법 및 이를 지원하는 장치
US9867103B2 (en) * 2012-12-20 2018-01-09 Lg Electronics Inc. Method for communicating in wireless communication system and apparatus supporting same
KR20140142915A (ko) * 2013-06-05 2014-12-15 삼성전자주식회사 통신 시스템에서 핸드오버 시점을 결정하는 방법 및 장치
US20150094069A1 (en) * 2013-09-30 2015-04-02 Qualcomm Incorporated Enhanced inter-radio access technology handover procedures
US9813968B1 (en) * 2015-11-03 2017-11-07 Sprint Communications Company L.P. Management of channel status information for LTE redirects
US11166282B2 (en) * 2016-04-12 2021-11-02 Apple Inc. Evolved Node-B (eNB), radio access network (RAN) central unit (RCU) and methods for radio resource control (RRC)
CN107404723B (zh) * 2016-05-20 2020-08-21 北京小米移动软件有限公司 一种接入基站的方法和装置
US11910258B2 (en) * 2016-08-10 2024-02-20 Nec Corporation Radio access network node, radio terminal, core network node, and method therefor
WO2018029933A1 (ja) 2016-08-10 2018-02-15 日本電気株式会社 無線アクセスネットワークノード、無線端末、コアネットワークノード、及びこれらの方法
CN113507736A (zh) 2016-08-10 2021-10-15 日本电气株式会社 无线接入网节点、无线终端、核心网节点及其方法
CN109561423B (zh) * 2017-01-26 2020-07-14 华为技术有限公司 一种接入目标小区的方法以及装置
CN108696907B (zh) * 2017-03-15 2020-10-30 普天信息技术有限公司 一种终端切换小区触发的集群业务的释放方法
US11032744B2 (en) 2017-05-04 2021-06-08 At&T Intellectual Property I, L.P. Inter-distributed unit beam switch procedure triggered by radio link interruption
US10644974B2 (en) 2017-05-04 2020-05-05 At&T Intellectual Property I, L.P. Measurements and radio link monitoring in a wireless communications system
US10499398B2 (en) 2017-09-29 2019-12-03 At&T Intellectual Property I, L.P. Facilitating mobile device-assisted mobility enhancement to improve user plane interruption time
US10652691B2 (en) * 2018-07-20 2020-05-12 Qualcomm Incorporated Optimized positioning method for mobile devices
CN110493834A (zh) * 2019-09-24 2019-11-22 京信通信系统（中国）有限公司 一种提高切换成功率的方法及装置
CN113873584B (zh) * 2020-06-30 2023-04-07 大唐移动通信设备有限公司 一种小区切换方法及通信装置
US11337131B1 (en) * 2020-12-31 2022-05-17 Sterlite Technologies Limited Method and apparatus for recommending real-time handover to a target cell in open-radio access network (O-RAN) environment
JP2022158831A (ja) * 2021-03-31 2022-10-17 スターライト テクノロジーズ リミテッド ハンドオーバーおよびターゲットセル選択のためのユーザー機器識別方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101213857A (zh) * 2005-06-29 2008-07-02 摩托罗拉公司 用于无线网络中小区选择的装备和方法
CN101841858A (zh) * 2009-03-17 2010-09-22 大唐移动通信设备有限公司 负载信息交互方法、装置和系统
CN102415162A (zh) * 2009-05-04 2012-04-11 捷讯研究有限公司 用于移动台识别无线接入技术的系统和方法

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI104683B (fi) * 1997-02-18 2000-04-14 Nokia Networks Oy Kanavanvaihto matkaviestinjärjestelmässä
US6885866B1 (en) * 1998-06-26 2005-04-26 Nokia Corporation Handover-method in a cellular radio system with two frequency bands
EP1474946B1 (de) 2002-02-11 2008-01-02 Siemens Aktiengesellschaft Verfahren und entsprechende vorrichtungen zur verwaltung von funkressourcen in einem funk-kommunikationssystem
WO2007144732A2 (en) * 2006-06-14 2007-12-21 Nortel Networks Limited Inter-subsystem transfers
CN101202974B (zh) 2006-12-15 2011-09-28 华为技术有限公司 一种多制式基站互通的系统、基站及方法
US8467798B2 (en) * 2007-08-20 2013-06-18 Lg Electronics Inc. Method of performing cell reselection in wireless communication system
CN101374324B (zh) * 2007-08-23 2012-03-14 电信科学技术研究院 一种移动终端实现小区切换的方法、系统及节点设备
GB2455068B (en) * 2007-11-16 2010-07-28 Motorola Inc A base station for a cellular communication system and a method of operation therefor
KR20090112323A (ko) * 2008-04-24 2009-10-28 엘지전자 주식회사 기지국의 부하 상태를 고려한 핸드오버 방법
KR101550463B1 (ko) * 2008-12-30 2015-09-14 엘지전자 주식회사 핸드오버 방법
GB2472596A (en) * 2009-08-11 2011-02-16 Nec Corp A system to coordinate the changing of handover/cell reselection parameters between e-utran and non e-utran rats to reduce repeated handover /cell reselection
CN101998564A (zh) * 2009-08-21 2011-03-30 中兴通讯股份有限公司 一种终端切换方法及基站
EP2564610A4 (en) * 2010-04-26 2015-07-01 Nokia Solutions & Networks Oy DYNAMIC FREQUENCY REUSE
US9226130B2 (en) * 2010-07-13 2015-12-29 Telefonaktiebolaget L M Ericsson (Publ) Methods and arrangements relating to mobility control information
CN101895949B (zh) 2010-07-15 2014-09-10 中兴通讯股份有限公司 一种不同网络制式间切换的方法及装置
ES2930169T3 (es) * 2010-08-13 2022-12-07 Zte Corp Métodos para la implementación de comunicaciones para un dispositivo terminal
US9473994B2 (en) * 2010-12-30 2016-10-18 Motorola Solutions, Inc. Method and system for selecting a target cell for handover of user equipment in a long term evolution system
WO2012116741A1 (en) * 2011-03-02 2012-09-07 Nokia Siemens Networks Oy Improved neighbour cell relation
CN102316542B (zh) * 2011-09-09 2018-01-19 中兴通讯股份有限公司 一种盲切换或盲重定向的方法及系统
US9148824B2 (en) * 2011-12-21 2015-09-29 Telefonaktiebolaget L M Ericsson (Publ) Methods and apparatus for controlling circuit switched fall back of a mobile station from E-UTRAN to UTRAN/GERAN in a full-multi-operator core network
BR112014020305A8 (pt) * 2012-02-17 2021-06-29 Dali Systems Co Ltd métodos para equilibrar o tráfego de rede não uniformemente distribuído em um sistema de comunicações sem fio, e para equilibrar o tráfego de srede não uniformemente distribuído em um sistema de antenas distribuído (das), e, sistema de antenas distribuído (das)

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101213857A (zh) * 2005-06-29 2008-07-02 摩托罗拉公司 用于无线网络中小区选择的装备和方法
CN101841858A (zh) * 2009-03-17 2010-09-22 大唐移动通信设备有限公司 负载信息交互方法、装置和系统
CN102415162A (zh) * 2009-05-04 2012-04-11 捷讯研究有限公司 用于移动台识别无线接入技术的系统和方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11228931B2 (en) * 2018-08-10 2022-01-18 Qualcomm Incorporated On-demand physical layer reporting by a UE

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