WO2011144147A1 - 切换方法、专网用户设备、接入网设备以及系统 - Google Patents

切换方法、专网用户设备、接入网设备以及系统 Download PDF

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Publication number
WO2011144147A1
WO2011144147A1 PCT/CN2011/075175 CN2011075175W WO2011144147A1 WO 2011144147 A1 WO2011144147 A1 WO 2011144147A1 CN 2011075175 W CN2011075175 W CN 2011075175W WO 2011144147 A1 WO2011144147 A1 WO 2011144147A1
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WIPO (PCT)
Prior art keywords
measurement
user equipment
private network
measurement period
network user
Prior art date
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PCT/CN2011/075175
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English (en)
French (fr)
Inventor
李爽
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.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to RU2013114769/07A priority Critical patent/RU2013114769A/ru
Priority to EP11783064.6A priority patent/EP2605575A4/en
Priority to KR1020137006528A priority patent/KR20130042020A/ko
Publication of WO2011144147A1 publication Critical patent/WO2011144147A1/zh
Priority to US13/782,591 priority patent/US20130178213A1/en

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Classifications

    • 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
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • 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
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • 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
    • 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
    • H04W36/0088—Scheduling 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
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a handover method, a private network user equipment, an access network device, and a system.
  • NTN Next Generation Network
  • the content defined by the standard protocol of LTE is mainly for common user equipment and a general telecommunication network, and the requirements for performance indicators are for ordinary users.
  • some private networks will be involved. These special application scenarios include but are not limited to: Transportation, especially high-speed transportation, such as railways, highways, subways, and high-speed railways.
  • Transportation especially high-speed transportation, such as railways, highways, subways, and high-speed railways.
  • LTE user equipment is deployed on the car
  • LTE base stations are deployed along the railway
  • LTE base stations only provide access services for dedicated user equipment on the train.
  • the entire network is a private network for railway communications.
  • the inventors of the present invention found that the handover procedure defined in accordance with the existing LTE standard protocol is difficult to meet the requirements of the private network, and the subjective feeling of the user is reduced.
  • the embodiments of the present invention provide a handover method, a private network user equipment, an access network device, and a system, so that the measurement period can be adjusted and controlled, so that the handover delay meets the communication requirements of the private network scenario.
  • a switching method includes:
  • the private network user equipment receives the measurement control message sent by the access network device, where the measurement control message carries information about the measurement period, and the related information of the measurement period is used to indicate that the private network user equipment determines the measurement period of the neighboring area measurement;
  • the user equipment of the private network determines the measurement period according to the relevant information of the received measurement period; the user equipment of the private network performs the measurement of the neighboring area within the determined measurement period, and obtains a measurement report about the signal quality of the neighboring area;
  • the private network user equipment sends the measurement report to the access network device, and the measurement report is the basis for the handover network device to perform the handover decision;
  • the private network user equipment receives a handover command sent by the access network device, where the handover command is a result of the handover decision performed by the access network device;
  • the private network user equipment performs handover according to the handover command.
  • a switching method includes:
  • the access network device sends a measurement control message to the private network user equipment, where the measurement control message carries information about the measurement period, and the related information of the measurement period is used to indicate that the private network user equipment determines the measurement period of the neighboring area measurement;
  • a handover command is sent to the private network user equipment, and the handover command instructs the private network user equipment to perform handover.
  • a private network user equipment including:
  • the measurement control message receiving module is configured to receive a measurement control message sent by the access network device, where the measurement control message carries related information of the measurement period, where the information about the measurement period is used to indicate that the private network user equipment determines the measurement period of the neighboring area measurement ;
  • a measurement period determining module configured to determine a measurement period according to related information of the received measurement period
  • the measurement report obtaining module is configured to perform neighboring area measurement in the determined measurement period, and obtain a measurement report on the signal quality of the neighboring area
  • a sending module configured to send the measurement report obtained by the measurement report obtaining module to the access network device, where the measurement report is used as a basis for the access network device to perform a handover decision;
  • a handover command receiving module configured to receive a handover command sent by the access network device, where the handover command is a result of the handover decision performed by the access network device;
  • the switching module is configured to switch according to a switching command received by the switching command receiving module.
  • An access network device including:
  • a measurement control message sending module configured to send a measurement control message to the private network user equipment, where the measurement control message carries information about the measurement period, where the information about the measurement period is used to indicate that the private network user equipment determines the measurement period of the neighboring area measurement;
  • a receiving module configured to receive a measurement report about the signal quality of the neighboring area sent by the user equipment of the private network, where the measurement is a measurement result of the measurement performed by the private network user equipment in the determined measurement period;
  • the measurement report is used to make a handover decision;
  • the handover command sending module is configured to send, to the private network user equipment, a handover command, where the result of the handover decision module decision is yes, the handover command instructing the private network user equipment to perform handover.
  • a switching system includes: the above-mentioned private network user equipment and access network equipment.
  • FIG. 1 is a schematic flowchart of a handover method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a handover method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a handover method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a logical structure of a user equipment of a private network according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a logical structure of an access network device according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a logical structure of a handover system according to an embodiment of the present invention.
  • the embodiment of the invention provides a handover method.
  • the embodiment of the invention further provides a corresponding private network user equipment, an access network equipment and a handover system. The details are described below separately.
  • the traffic scene will add some restrictions to the common telecommunications scene, and at the same time, some restrictions will be reduced.
  • LTE user equipment is deployed on the car
  • LTE base stations are deployed along the railway
  • the LTE base station only provides access services for dedicated user equipment on the train.
  • the entire network is a private network for railway communication.
  • both the user equipment and the network are provided by the same vendor.
  • the motion direction of the user equipment is fixed
  • the next neighboring area of the user equipment handover is also fixed.
  • the private network scene has a relatively high requirement for handover delay.
  • the optimization space that the standard protocol can provide for handover delay is very limited. You can only consider making small changes to the standard protocol to increase access latency. Since this network is closed, it is only necessary to agree on the user equipment and the network side.
  • the protocol layer of the LTE user equipment includes: a non-access stratum (NAS, Non Access Stratum), a radio resource control protocol layer (RRC, Radio Resource Control), a packet data convergence protocol layer (PDCP, Packet Data Convergence Protocol), a radio link.
  • NAS Non Access Stratum
  • RRC Radio Resource Control
  • PDCP Packet Data Convergence Protocol
  • Control Layer RLC, Radio Link Control
  • Media Access Control Layer MAC, Media Access Control
  • PHY Physical Layer
  • the in-vehicle user equipment is an LTE UE, and the LTE UE to the eNode B is used as a vehicle-to-ground air interface back-to-back system.
  • the LTE UE may be referred to as a private network user equipment.
  • the LTE network is a proprietary network with only a small amount under each cell.
  • the network in the embodiment of the present invention may be a dedicated network in a high-speed motion scenario, and the private network user equipment and the access network equipment on the network side are configured in advance by the equipment manufacturer or the operator.
  • a first embodiment of a handover method in an embodiment of the present invention specifically includes:
  • the private network user equipment receives a measurement control message sent by the access network device.
  • the private network user equipment receives the measurement control message sent by the access network device, where the measurement control message carries information about the measurement period of the private network user equipment to the access network device, and the related information of the measurement period is used to indicate that the private network user equipment determines The measurement period of the neighboring area measurement;
  • the information about the measurement period may be a specific value or an index value of the measurement period, and the specific value or index value of the measurement period is determined by the access network device;
  • the information about the measurement period may be information indicating that the measurement period is dynamically selected by the private network user equipment itself;
  • the user equipment of the private network is related to the measurement period, and determines the measurement period. If the relevant information of the measurement period is a specific value, the measurement period can be determined according to the specific value, that is, the measurement period is equal to the specific value; for example:
  • Static settings are made according to the average speed of the high-speed train, for example: When the speed of the high-speed train is
  • the handover delay needs to be reduced by 100 milliseconds, and the current handover delay is 200 milliseconds. Then, the measurement period of the neighboring area measurement by the private network user equipment is 40 milliseconds, and the measurement control message carries the period of 40 milliseconds directly;
  • the period is obtained according to a preset rule; for example:
  • the measurement control message sent by the access network device may be a bit identifier that is reserved in the mobile control cell in the control signaling, and is sent by the access network device to the private network user equipment together with the control signaling, specifically The two bits in the reserved bits in the mobile control cell in the control signaling are utilized.
  • the measurement period can be configured as: 40 milliseconds, 80 milliseconds, 120 milliseconds, 200 milliseconds, and two bits can be expressed as: 00 for 40 milliseconds, 01 for 80 milliseconds, and 10 for 120 In milliseconds, 11 represents 200 milliseconds;
  • the information about the measurement period is information indicating that the measurement period is dynamically selected by the private network user equipment itself, when the private network user equipment receives the indication information, the corresponding measurement period is obtained according to the running speed of the network; for example:
  • the private network user equipment receives the measurement control message sent by the access network device, where the information carries the information about the measurement period, and the related information of the measurement period is information indicating that the measurement period is dynamically selected by the private network user equipment. It may be that the bit identifier that is reserved in the mobile control cell in the control signaling is sent by the access network device to the private network user equipment. Specifically, one bit of the reserved bits in the mobility control cell in the control signaling may be used to carry information, and the private network user equipment is controlled to dynamically determine the measurement period of the neighboring cell measurement.
  • one bit can be expressed as: 1 is dynamic acquisition, 0 is static configuration; after the private network user equipment receives the measurement control message, if it carries 1 , the current running speed is obtained from the running system of the vehicle (both The running speed of the vehicle, such as the high-speed rail, is also the running speed of the user equipment of the private network. According to the running speed, the corresponding period is obtained from the correspondence table between the running speed saved in the local and the period reporting the measurement report, as shown in Table 1. Show:
  • the corresponding measurement period is determined to be 80 milliseconds, and the private network user equipment reports the measurement report every 80 milliseconds.
  • the related message of the measurement period sent by the access network device may also be a newly configured message. As long as the access network device on the network side and the private network user device are in agreement, the newly configured message can be identified and processed.
  • the user equipment of the private network performs neighboring area measurement in the measurement period, and generates a measurement report about the signal quality of the neighboring area;
  • the RRC layer of the private network user equipment sends a measurement control interface message to the PHY layer of the private network user equipment after the measurement period is obtained, where the measurement control interface message carries the measurement period; After carrying the control interface message of the measurement period, the signal quality of the neighboring area is measured and a measurement report is generated in each measurement period, and the measurement report is sent to the RRC layer of the user equipment of the private network.
  • the private network user equipment sends a measurement report to the access network device.
  • the step may include: after receiving the measurement report sent by the PHY layer of the private network user equipment, the RRC layer of the private network user equipment filters the measurement report, and sends the filtered measurement report to the access network on the network side. device.
  • the measurement report is used as a basis for the handover decision of the access network device, so that the access network device determines whether the signal quality of the neighboring cell meets the handover condition in a timely manner, and if the handover condition is met, the handover is determined, and the handover command is sent to the private network.
  • User equipment is used as a basis for the handover decision of the access network device, so that the access network device determines whether the signal quality of the neighboring cell meets the handover condition in a timely manner, and if the handover condition is met, the handover is determined, and the handover command is sent to the private network.
  • the private network user equipment receives a handover command sent by the access network device.
  • the access network device performs a handover decision according to the measurement report sent by the private network user equipment. If it is determined that the handover is performed, the handover command is sent to the private network user equipment, and the private network user equipment receives the handover command sent by the network side.
  • the private network user equipment After receiving the handover command sent by the access network device, the private network user equipment performs handover according to the handover command.
  • the technical solution provided by the embodiment of the present invention implements the measurement control message to indicate that the private network user equipment determines the measurement period of the neighboring area measurement, breaks the limitation of the existing protocol, and realizes the adjustable and controllable measurement period, so that the handover delay is satisfied.
  • the communication needs of the private network scenario improve the user experience.
  • the method for determining the measurement period is very flexible.
  • the measurement period can be adjusted and controlled in real time according to the running speed of the user equipment of the private network, or the static configuration mode can be used to meet the specific requirements of different scenarios.
  • the access network device sends a measurement control message to the private network user equipment.
  • a measurement control message is generated, where the measurement control message carries information about the measurement period, and information about the measurement period The measurement period for instructing the private network user equipment to determine the neighboring area measurement;
  • the information about the measurement period may be a specific value or an index value of the measurement period, and the specific value or index value of the measurement period is determined by the access network device;
  • the cycle is statically set according to the average speed of the high-speed train, for example: When the high-speed train has a speed of 450 km, the switching delay needs to be reduced by 100 msec, and the current switching delay It is 200 milliseconds. Then, the measurement period of the neighboring cell measurement of the private network user equipment can be set to 40 milliseconds, and the measurement period is directly carried in the measurement control message for 40 milliseconds;
  • the information about the measurement period is an index value, for example: a measurement control message, it may be a bit identifier retained in the mobility control cell in the control signaling, and sent by the access network device together with the control signaling
  • the private network user equipment specifically, can utilize two bits in the reserved bits in the mobile control cell in the control signaling, and the measurement period can be configured as: 40 milliseconds, 80 milliseconds, 120 milliseconds, 200 milliseconds, Two bits can be expressed as: 00 for 40 milliseconds, 01 for 80 milliseconds, 10 for 120 milliseconds, and 11 for 200 milliseconds;
  • the access network device receives the measurement report.
  • the access network device receives a measurement report about the signal quality of the neighboring area sent by the user equipment of the private network, and the measurement report is a measurement result of the measurement performed by the private network user equipment in the measurement period.
  • the access network device performs a handover decision according to the measurement report.
  • the access network device After receiving the measurement report sent by the private network user equipment, the access network device determines whether to perform handover on the private network user equipment according to the measurement report, and if the handover condition is not reached, determines that the handover is not performed; if the handover condition is reached, determines the handover. .
  • the access network device sends a handover command to the private network user equipment.
  • the access network device After determining that the private network user equipment is switched, the access network device sends a handover command to the private network user equipment, so that the private network user equipment performs the handover procedure.
  • the information about the measurement period may be information indicating that the measurement period is dynamically selected by the private network user equipment itself; for example:
  • the measurement control message carries the indication information that the private network user equipment dynamically sends the measurement report period to the access network device, and may use the bit identifier retained in the mobility control cell in the control signaling, and together with the control signaling It is sent by the access network device to the private network user equipment.
  • One bit of the bits reserved in the mobile control cell in the control signaling may be used to carry information, and the private network user equipment is controlled to determine the measurement period of the neighboring cell measurement.
  • one bit can be expressed as: 1 is dynamic acquisition, 0 is static configuration; after the network user equipment receives the measurement control message, if it carries 1 , the current running speed is obtained from the running system of the vehicle (both The running speed of the vehicle, such as the high-speed rail, is also the running speed of the user equipment of the private network. According to the running speed, the corresponding period is obtained from the correspondence table between the running speed saved in the local and the period reporting the measurement report, as shown in Table 2. Show:
  • the corresponding period is determined to be 80 milliseconds, and the private network user equipment reports the measurement report every 80 milliseconds.
  • the access network device obtains the real-time running speed of the user equipment of the private network, which can be measured by the access network device itself or by the private network user equipment.
  • the access network device measures the running speed of the private network user equipment, including: the access network device obtains the downlink frequency offset, and then calculates the frequency after the frequency offset according to the obtained frequency offset, and then calculates the running speed of the private network user equipment. .
  • the access network equipment (such as the base station) is fixed.
  • the private network user equipment installed in the vehicle is moving at high speed with the vehicle.
  • the speed of the base station is u
  • the private network user is vl
  • the speed of the wave is v2
  • the frequency emitted by the wave source is fl
  • the access network device obtains the corresponding measurement period locally according to the obtained running speed.
  • the technical solution provided by the embodiment of the present invention implements a measurement control message to indicate that the private network user equipment determines the measurement period of the neighboring area measurement, breaks the limitation of the existing protocol, and implements the measurement period. Adjustable and controllable, so that the switching delay meets the communication requirements of the private network scenario and improves the user experience. Further, the method for determining the measurement period is very flexible. For example, the measurement period can be adjusted and controlled in real time according to the running speed of the user equipment of the private network, or the static configuration can be used to meet the specific requirements of different scenarios.
  • FIG. 3 is a schematic flowchart of a method for switching a traffic field scenario according to an embodiment of the present invention.
  • a complete description of a complete process of a handover method according to an embodiment of the present invention will be hereinafter described with reference to FIG.
  • the high-speed rail is used as an application scenario, and correspondingly, the private network user equipment is a vehicle-mounted private network user equipment.
  • Step 301 The source base station interacts with the serving gateway to obtain area restriction information.
  • the source base station acquires the area restriction information when establishing a link with the serving gateway, or the area restriction information acquired when the source base station updates the current time advance amount TA, for example, area restrictions information, and adds the area restriction information to the user context (UE) Context ).
  • UE user context
  • Step 302 The source base station initiates a user measurement process according to the area restriction information, and the source base station sends a measurement control command to the in-vehicle private network user equipment.
  • the source base station sends a measurement control command to the in-vehicle private network user equipment, and uses the two bits in the reserved bits in the mobile control cell in the measurement control signaling to add a measurement period information, which can be understood.
  • the period of the neighboring area measurement for the in-vehicle user equipment can also be understood as the period during which the in-vehicle user equipment reports the measurement report of the signal quality of the neighboring area;
  • the delay needs to be reduced by 100 milliseconds, and the immediate delay should be controlled within 100 milliseconds to ensure the quality of the call.
  • two bits 01 can be used to represent a period of 80 milliseconds.
  • Step 303 The in-vehicle private network user equipment reports the measurement report to the source base station.
  • the RRC layer of the private network user equipment After receiving the measurement control signaling of the carrying period sent by the base station on the network side, the RRC layer of the private network user equipment sends a measurement control interface message to the PHY layer of the private network user equipment, where the measurement control interface message carries the measurement Period 01 carried in the control signaling;
  • the PHY layer of the private network user equipment After receiving the control interface message of the carrying period sent by the RRC layer of the private network user equipment, the PHY layer of the private network user equipment measures the signal quality of the neighboring area every 80 milliseconds. After the measurement is completed, the measurement report is sent to the private network.
  • the RRC layer of the user equipment
  • Step 304 The source base station performs a handover decision according to the measurement report reported by the user equipment of the in-vehicle private network.
  • Step 305 The source base station sends a handover request to the target base station.
  • the in-vehicle private network user equipment can be switched to the vehicle in a shorter time.
  • Target base station Since the time interval for reporting the measurement report by the in-vehicle private network user equipment is shorter, after the source base station receives the measurement report, if the handover condition is determined to be switched, the in-vehicle private network user equipment can be switched to the vehicle in a shorter time. Target base station.
  • the source base station can send a handover request (HANDOVER Request) to the target base station after 80 milliseconds, and the handover is shortened.
  • HANDOVER Request handover request
  • Step 306 The target base station performs admission control.
  • the target base station After receiving the handover request, the target base station configures the required resources if it decides to agree to the handover.
  • Step 307 The target base station returns a handover response message to the source base station.
  • the target base station returns a handover response message to the source base station, and after receiving the handover request response, the source base station forwards the data.
  • Step 308 The source base station sends a radio resource control connection reconfiguration message to the in-vehicle private network user equipment.
  • the source base station After receiving the handover response message sent by the target base station, the source base station sends a radio resource control connection reconfiguration message to the in-vehicle private network user equipment, where the message carries the preamble ID information of the target cell;
  • the in-vehicle private network user equipment receives the radio resource control connection reconfiguration message, performs handover according to the command of the source base station, disconnects the communication with the source base station, and synchronizes to the new cell.
  • the in-vehicle private network user equipment sends a hybrid automatic retransmission/automatic retransmission response to the source base station after performing the handover, for example: HARQ/ARQ responses.
  • the source base station translates the resources and transmits the data to the target base station.
  • Step 309 The source base station sends an SN state transition message to the target base station.
  • Step 310 The in-vehicle private network user equipment sends a radio resource control connection reconfiguration complete message to the target base station.
  • the radio resource is sent to the target base station. Controls the connection reconfiguration complete message.
  • Step 311 The target base station sends a path switch message to the mobility management entity.
  • the target base station sends a path switch message to the mobility management entity, to notify the in-vehicle private network user equipment that the cell handover has been completed.
  • Step 312 The mobility management entity sends an update user plane request message to the serving gateway.
  • Step 313 The serving gateway switches the downlink data path to the target base station, and sends one or more termination identifier data to the source base station in the original path, and translates the user plane resource of the connection source base station.
  • Step 314 The serving gateway sends an update user plane response message to the mobility management entity.
  • Step 315 The mobility management entity sends a path switch request response message to the target base station.
  • Step 316 The target base station sends a user context release message to the source base station.
  • the target base station After receiving the path switch response message sent by the mobility management entity, the target base station sends a user context release message to the source base station, notifying the source base station that the handover has succeeded, and triggering the source base station to perform resource translation and release.
  • Step 317 The source base station performs resource translation and release
  • the source base station After the source base station receives the user context release message, the source base station translates the radio resource and the C-plane control plane resource related to the user context.
  • the technical solution provided by the embodiment of the present invention implements the measurement control message to indicate that the private network user equipment determines the measurement period of the neighboring area measurement, breaks the limitation of the existing protocol, and realizes the adjustable and controllable measurement period, so that the handover delay is satisfied.
  • the communication needs of the private network scenario improve the user experience.
  • a fourth embodiment of a private network user equipment in the embodiment of the present invention specifically: a measurement control message receiving module 401, configured to receive a measurement control message sent by an access network device, where the measurement control message carries a measurement period
  • the related information of the measurement period is used to indicate that the private network user equipment determines the measurement period of the neighboring area measurement;
  • the related information of the measurement period may be a specific value or an index value of the measurement period, and the specific value or index of the measurement period The value is determined by the access network device;
  • the information about the measurement period may also be information indicating that the measurement period is dynamically selected by the private network user equipment itself.
  • the measurement period determining module 402 is configured to determine the measurement period according to the relevant information of the measurement period. Specifically, if the relevant information of the measurement period is a specific value of the measurement period, the specific value is the measurement period; if the measurement period is related The information is an index value, and the corresponding relationship table between the running speed of the private network user equipment and the period of reporting the measurement report according to the index value according to the index value.
  • the private network user equipment first obtains the current running speed (both the running speed of the vehicle such as the high-speed rail, The running speed of the user equipment of the private network is obtained according to the operating speed, and the corresponding measurement period is obtained in the correspondence table between the local running speed and the period reporting the measurement report.
  • the measurement report obtaining module 403 is configured to perform neighboring area measurement in the measurement period determined by the measurement period obtaining module 402, and obtain a measurement report on the signal quality of the neighboring area.
  • the sending module 404 is configured to send a measurement report to the access network device, where the measurement report is used as a basis for the access network device to perform a handover decision.
  • the access network device can determine the handover according to the measurement report and return a handover command.
  • the handover command receiving module 405 is configured to receive a handover command sent by the access network device, where the handover command is a result of the handover decision performed by the access network device.
  • the switching module 406 is configured to perform switching according to the switching command received by the handover command receiving module 405.
  • the related information of the measurement period sent by the measurement control message receiving module 401 is a specific value or an index value of the measurement period, and correspondingly, the measurement period determining module 402 is configured to use the specific value or the value of the measurement period. Corresponding specific values are used as measurement periods.
  • the information related to the measurement period sent by the measurement control message receiving module 401 may be information indicating that the measurement period is dynamically selected by the private network user equipment itself; correspondingly, the private network user equipment further includes:
  • a configuration module configured to configure a comparison relationship between the measurement period and the running speed
  • the measurement period determining module 402 includes:
  • the running speed obtaining unit is configured to acquire the running speed of the private network user equipment itself; the measuring period searching unit is configured to find a comparison relationship table between the measuring period and the running speed, and determine the measuring period.
  • the running speed of the private network user equipment is obtained by the private network user equipment itself or obtained by the access network equipment.
  • the measurement report acquisition module 403 can include:
  • a radio resource control protocol layer unit configured to send a measurement control interface message to the physical layer unit, where the measurement control interface message carries a measurement period;
  • Physical layer unit used to measure the signal quality of the neighboring area during the measurement period, and generate the measurement Volume report.
  • the technical solution provided by the embodiment of the present invention implements the measurement control message to indicate that the private network user equipment determines the measurement period of the neighboring area measurement, breaks the limitation of the existing protocol, and realizes the adjustable and controllable measurement period, so that the handover delay is satisfied.
  • the communication needs of the private network scenario improve the user experience.
  • the method for determining the measurement period is very flexible.
  • the measurement period can be adjusted and controlled in real time according to the running speed of the user equipment of the private network, or the static configuration can be used to meet the specific requirements of different scenarios.
  • a measurement control message sending module 501 configured to send a measurement control message to a private network user equipment, where the measurement control message carries a measurement period
  • the related information of the measurement period is used to indicate that the private network user equipment determines the measurement period of the neighboring area measurement, so that the private network user equipment performs the signal quality measurement of the neighboring area and reports the measurement report in each of the measurement periods;
  • the relevant information of the measurement period may be a specific value or an index value of the measurement period, and the specific value or the value of the measurement period is determined by the access network device; the relevant information of the measurement period may also be dynamically selected by the user equipment of the private network. Information on the measurement period.
  • the receiving module 502 is configured to receive a measurement report about a neighboring cell signal quality sent by the private network user equipment, where the measurement report is a measurement result that the private network user equipment performs measurement during the measurement period.
  • the handover decision module 503 is configured to perform a handover decision according to the measurement report received by the receiving module.
  • the handover command sending module 504 is configured to send, to the private network user equipment, a handover command, where the result of the handover decision module decision is yes, the handover command instructing the private network user equipment to perform handover.
  • the access network device further includes:
  • the obtaining module is configured to determine a specific value or an index value of the measurement period according to the running speed average value or the empirical value of the user equipment of the private network; or, according to the requirements of the access network device according to the operator requirement or the current network, determine the specific measurement period Value or index value; or, according to the running speed reported by the user equipment of the private network, determine the specific value or index value of the measurement period.
  • the access network device may further include:
  • the operation speed module of the private network user equipment is obtained, and the running speed of the user equipment of the private network is obtained.
  • the module for obtaining the running speed of the user equipment of the private network includes: The obtaining unit is configured to obtain a downlink frequency offset, and the calculating unit is configured to obtain a running speed of the user equipment of the private network according to the downlink frequency offset obtained by the acquiring unit.
  • the technical solution provided by the embodiment of the present invention implements the measurement control message to indicate that the private network user equipment determines the measurement period of the neighboring area measurement, breaks the limitation of the existing protocol, and realizes the adjustable and controllable measurement period, so that the handover delay is satisfied.
  • the communication needs of the private network scenario improve the user experience.
  • the method for determining the measurement period is very flexible.
  • the measurement period can be adjusted and controlled in real time according to the running speed of the user equipment of the private network, or the static configuration can be used to meet the specific requirements of different scenarios.
  • the switching system may include an access network device 601 and a private network user device 602.
  • the access network device 601 can be the access network device described in the foregoing access network device
  • the private network user device 602 can be the private network user device described in the embodiment of the private network user device.
  • the specific system may include, but is not limited to: Wideband Code Division Multiple Access (WCDMA) or Global System for Mobile Communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, Referred to as CDMA) or Worldwide Interoperability for Microwave Access (WiMax).
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • WiMax Worldwide Interoperability for Microwave Access
  • the access network device in the embodiment of the present invention is: in the LTE system and the WiMax system, in the LTE system and the WiMax system, in the GSM system and the CDMA system, the base station subsystem (BSS), In the WCDMA system, it is a Radio Network Subsystem (RNS).
  • BSS base station subsystem
  • RNS Radio Network Subsystem
  • the storage medium may include: a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like.

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Description

切换方法、 专网用户设备、 接入网设备以及系统
本申请要求于 2010 年 9 月 3 日提交中国专利局、 申请号为 201010273370.4、 发明名称为"切换方法、 专网用户设备、 接入网设备以及 系统"的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域， 具体涉及一种切换方法、 专网用户设备、 接入网设备以及系统。
背景技术 随着无线通信技术的发展， 用户对于无线业务的需求越来越高， 为了 满足业务传输速率更快、时延更短、频带更宽的需求，下一代网络 NGN( Next Generation Network ), 例如 LTE ( Long Term Evolution, 长期演进 )技术应 运而生。
LTE的标准协议定义的内容主要针对普通用户设备和通用的电信网络， 对于性能指标的要求都是针对普通用户的。 但在一些特殊的应用场景， 会 涉及一些专用网络。 这些特殊的应用场景包括但不限于： 交通领域， 尤其 是高速交通领域， 例如铁路、 高速公路、 地铁以及高速铁路等。 例如， 在 铁路或高铁场景中， LTE用户设备部署在车厢上， LTE基站部署在铁路沿 线， LTE基站只为列车上的专用的用户设备提供接入服务， 整个网络是一 个铁路通信的专网。
在对现有技术的研究和实践过程中， 本发明的发明人发现， 按照现有 的 LTE标准协议定义的切换流程难以满足专用网络的要求， 降低了用户的 主观感受。
值得说明的是， 以上仅以 LTE系统为例进行了现有技术问题的描述， 实际上， 在其他制式的通信系统中， 也有类似的问题需要解决。 发明内容 本发明实施例提供一种切换方法、 专网用户设备、 接入网设备以及系 统， 实现测量周期的可调可控， 使得切换时延满足专网场景的通信需求。
一种切换方法， 包括：
专网用户设备接收接入网设备发送的测量控制消息， 该测量控制消息 携带测量周期的相关信息， 该测量周期的相关信息用于指示专网用户设备 确定邻区测量的测量周期；
专网用户设备根据接收的测量周期的相关信息， 确定测量周期； 专网用户设备在确定的测量周期内进行邻区测量， 得到关于邻区信号 质量的测量报告；
专网用户设备将测量报告发送给接入网设备， 该测量报告为接入网设 备进行切换判决的依据；
专网用户设备接收接入网设备发送的切换命令， 所述切换命令是所述 接入网设备进行切换判决的结果；
所述专网用户设备根据所述切换命令进行切换。
一种切换方法， 包括：
接入网设备向专网用户设备发送测量控制消息， 该测量控制消息携带 测量周期的相关信息， 该测量周期的相关信息用于指示专网用户设备确定 邻区测量的测量周期；
接收专网用户设备发送的关于邻区信号质量的测量报告， 该测量报告 为专网用户设备在确定的测量周期内进行测量的测量结果；
根据接收的测量报告进行切换判决；
在判决的结果为是的情况下， 向专网用户设备发送切换命令， 该切换 命令指令专网用户设备进行切换。
一种专网用户设备， 包括：
测量控制消息接收模块， 用于接收接入网设备发送的测量控制消息， 该测量控制消息携带测量周期的相关信息， 该测量周期的相关信息用于指 示专网用户设备确定邻区测量的测量周期；
测量周期确定模块， 用于根据接收的测量周期的相关信息， 确定测量 周期； 测量报告获取模块， 用于在确定的测量周期内进行邻区测量， 得到关 于邻区信号质量的测量 ^艮告；
发送模块， 用于将测量报告获取模块获取的测量报告发送给接入网设 备， 该测量报告为接入网设备进行切换判决的依据；
切换命令接收模块， 用于接收所述接入网设备发送的切换命令， 该切 换命令是接入网设备进行切换判决的结果；
切换模块， 用于根据切换命令接收模块接收的切换命令进行切换。 一种接入网设备， 包括：
测量控制消息发送模块， 用于向专网用户设备发送测量控制消息， 该 测量控制消息携带测量周期的相关信息， 该测量周期的相关信息用于指示 专网用户设备确定邻区测量的测量周期；
接收模块， 用于接收专网用户设备发送的关于邻区信号质量的测量报 告， 该测量 4艮告为专网用户设备在确定的测量周期内进行测量的测量结果； 切换判决模块， 用于根据测量报告进行切换判决；
切换命令发送模块， 用于在切换判决模块判决的结果为是的情况下， 向专网用户设备发送切换命令， 该切换命令指令专网用户设备进行切换。
一种切换系统， 包括： 上述专网用户设备和接入网设备。
本发明实施例提供的技术方案， 通过测量控制消息来控制专网用户设 备测量邻区信号质量的周期， 从而控制专网用户设备切换的时间， 实现了 测量周期的可调可控 , 使得切换时延满足专网场景的通信需求。 附图说明 图 1是本发明实施例切换方法流程示意图；
图 2是本发明实施例切换方法流程示意图；
图 3是本发明实施例切换方法流程示意图；
图 4是本发明实施例专网用户设备逻辑结构示意图；
图 5是本发明实施例接入网设备逻辑结构示意图；
图 6是本发明实施例切换系统逻辑结构示意图。 具体实施方式 本发明实施例提供一种切换方法， 本发明实施例还提供相应的专网用 户设备、 接入网设备和切换系统。 以下分别进行详细说明。
当 LTE网络被用于高速铁路的通信时， 由于应用场景的不同， 交通场 景相对普通电信场景会增加一些限制条件， 同时又会减少一些限制条件。
例如， 在铁路或高铁场景中， LTE用户设备部署在车厢上， LTE基站 部署在铁路沿线， LTE基站只为列车上的专用的用户设备提供接入服务， 整个网络是一个铁路通信的专网。
一般而言， 用户设备和网络都是同一家厂商提供。 在用户设备运动方 向固定的情况下， 用户设备切换的下一个邻区也是固定的， 同时， 专网场 景对切换时延要求比较高。 在这种场景下， 标准协议能够提供的切换时延 的优化空间是非常有限的。 只能考虑在标准协议上面做一些小的改动， 进 而提高接入时延。 由于这个网络是封闭的， 只要在用户设备和网络侧达成 一致即可。
LTE用户设备的协议层包括： 非接入层 ( NAS , Non Access Stratum ), 无线资源控制协议层（RRC, Radio Resource Control ), 分组数据汇聚协议 层（PDCP, Packet Data Convergence Protocol ), 无线链路控制层（RLC, Radio Link Control ), 介质访问控制层（MAC, Media Access Control ) 以及 物理接层（PHY, Physical )„
高铁场景下， 一般有如下特点：
1 )车载用户设备是一种 LTE UE, LTE UE到 eNode B做为车到地的空 口回传系统， 该 LTE UE可以称为专网用户设备。
2 )在这个系统里， LTE网络是一个专有网络， 每个小区下面只有少量
UE。
3 )在路轨边只要用户设备前进的方向是固定的， 其行进路线上切换的 小区就是固定的。
4 ) 同时这个系统对切换时延要求非常高， 切换时延越小越好。
因此， 在交通领域， 如何实现快速切换， 降低时延， 以满足交通领域 的通信的要求成为需要解决的技术问题。 在对现有技术的研究和实践过程中， 本发明的发明人发现， 高速列车 速度越来越快， 时速达到 450千米时， 需要更短的切换时延， 现有的协议的 切换时延因为是固定的 200毫秒， 有时候不能很好的满足更快速地切换的要 求， 降低了用户的主观感受。
本发明实施例中的网络可以是高速运动场景下的专用网络， 专网用户 设备和网络侧的接入网设备都预先由设备厂商或者运营商配置好。
请参阅图 1 , 本发明实施例中切换方法的第一实施例具体包括：
101、 专网用户设备接收接入网设备发送的测量控制消息；
专网用户设备接收接入网设备发送的测量控制消息， 该测量控制消息 携带了专网用户设备向接入网设备测量周期的相关信息， 该测量周期的相 关信息用于指示专网用户设备确定邻区测量的测量周期；
测量周期的相关信息可以为测量周期的具体数值或索引值， 该测量周 期的具体数值或索引值由接入网设备确定；
或者， 测量周期的相关信息可以为指示由专网用户设备自身动态选择 测量周期的信息；
102、 专网用户设备 居测量周期的相关信息， 确定测量周期； 如果测量周期的相关信息为具体数值， 根据该具体数值就能确定测量 周期， 即测量周期等于该具体数值； 例如：
根据高速列车的平均时速， 进行静态设置， 例如： 当高速列车时速为
450千米，切换时延需要减少 100毫秒， 而目前的切换时延是 200毫秒，那么， 专网用户设备设置邻区测量的测量周期为 40毫秒， 直接在测量控制消息中 携带周期 40毫秒；
如果测量周期的相关信息为索引值， 则根据预先设定的规则获取周期； 例如：
接入网设备发送的测量控制消息， 可以是利用控制信令中的移动控制 信元中保留的比特位标识， 并与所述控制信令一起由接入网设备发送给专 网用户设备， 具体的， 利用控制信令中的移动控制信元中保留的比特位中 的两个比特位。 测量周期可以配置为： 40毫秒、 80毫秒、 120毫秒、 200毫 秒， 用两个比特位可以表示为： 00代表 40毫秒， 01代表 80毫秒， 10代表 120 毫秒， 11代表 200毫秒；
如果测量周期的相关信息为指示由专网用户设备自身动态选择测量周 期的信息， 则专网用户设备接收该指示信息时， 根据自身的运行速度获取 相应的测量周期； 例如：
专网用户设备接收接入网设备发送的测量控制消息， 该消息中携带测 量周期的相关信息， 该测量周期的相关信息为指示由专网用户设备自身动 态选择测量周期的信息。 可以是利用控制信令中的移动控制信元中保留的 比特位标识， 由接入网设备发送给专网用户设备。 具体的， 可以利用控制 信令中的移动控制信元中保留的比特位中的一个比特位来携带信息， 控制 专网用户设备是否动态地确定邻区测量的测量周期。 例如， 一个比特位可 以表示为： 1为动态获取， 0为静态配置； 专网用户设备接收测量控制消息 后， 如果携带的是 1 , 则从交通工具的运行系统中获取当前的运行速度（既 是交通工具比如高铁的运行速度， 也是专网用户设备的运行速度）， 并根据 该运行速度从保存在本地的运行速度和上报测量报告的周期的对应关系表 中获取对应的周期， 如表 1所示：
Figure imgf000008_0001
Figure imgf000008_0002
例如， 当专网用户设备获取的运行速度时速为 300千米时 , 则确定对应 的测量周期为 80毫秒， 专网用户设备每 80毫秒上报测量报告。
接入网设备发送的测量周期的相关消息， 还可以是新配置的消息。 只 要在网络侧的接入网设备和专网用户设备协商一致， 能够识别和处理该新 配置的消息即可。
103、 专网用户设备在测量周期内进行邻区测量， 并生成关于邻区信号 质量的测量报告； 该步骤具体可以包括： 专网用户设备的 RRC层在获取到测量周期后， 向专网用户设备的 PHY层发送测量控制接口消息， 该测量控制接口消息携 带该测量周期； PHY层接收 RRC层发送的携带测量周期的控制接口消息后， 在每一个测量周期内对邻区的信号质量进行测量并生成测量报告， 将测量 报告发送给专网用户设备的 RRC层。
104、 专网用户设备向接入网设备发送测量报告；
该步骤具体可以包括： 专网用户设备的 RRC层接收专网用户设备的 PHY层发送的测量报告后， 对测量报告进行滤波， 并将经过滤波处理后的 测量报告发送给网络侧的接入网设备。 该测量报告为接入网设备进行切换 判决的依据， 使得接入网设备更及时对邻区的信号质量进行判断是否符合 切换条件， 如果符合切换条件， 则判定切换， 则发送切换命令给专网用户 设备。
105、 专网用户设备接收接入网设备发送的切换命令；
接入网设备根据专网用户设备发送的测量报告进行切换判决， 如果判 定为进行切换， 向专网用户设备发送切换命令， 专网用户设备接收网络侧 发送的切换命令。
106、 专网用户设备进行切换；
专网用户设备接收到接入网设备发送的切换命令后， 根据该切换命令 进行切换。
本发明实施例提供的技术方案， 通过测量控制消息实现指示专网用户 设备确定邻区测量的测量周期， 突破了现有协议的限制， 实现测量周期的 可调可控， 从而使得切换时延满足专网场景的通信需求， 提高用户体验。
进一步的， 确定测量周期的方式非常灵活， 比如， 既可以根据专网用 户设备的运行速度对测量周期进行实时调整和控制， 也可以釆用静态配置 的方式， 可以满足不同场景的具体需求。
请参阅图 2, 以下是本发明中切换方法的第二实施例， 具体的：
201、 接入网设备向专网用户设备发送测量控制消息；
接入网设备获取专网用户设备邻区测量的测量周期后， 生成测量控制 消息， 该测量控制消息携带测量周期的相关信息， 该测量周期的相关信息 用于指示专网用户设备确定邻区测量的测量周期；
测量周期的相关信息可以为测量周期的具体数值或索引值， 该测量周 期的具体数值或索引值由接入网设备确定；
如果测量周期的相关信息为具体数值， 例如： 该周期根据高速列车的 平均时速， 进行静态设置， 例如： 当高速列车时速为 450千米， 切换时延需 要减少 100毫秒， 而目前的切换时延是 200毫秒， 那么， 可以设置专网用户 设备邻区测量的测量周期为 40毫秒， 直接在测量控制消息中携带周期 40毫 秒；
如果测量周期的相关信息为索引值， 例如： 测量控制消息， 可以是利 用控制信令中的移动控制信元中保留的比特位标识 , 并与所述控制信令一 起由接入网设备发送给专网用户设备， 具体的， 可以利用控制信令中的移 动控制信元中保留的比特位中的两个比特位， 测量周期可以配置为： 40毫 秒、 80毫秒、 120毫秒、 200毫秒， 用两个比特位可以表示为： 00代表 40毫 秒， 01代表 80毫秒， 10代表 120毫秒， 11代表 200毫秒；
202、 接入网设备接收测量报告；
接入网设备接收专网用户设备发送的关于邻区信号质量的测量报告， 该测量报告为专网用户设备在测量周期内进行测量的测量结果。
203、 接入网设备根据测量报告进行切换判决；
接入网设备接收专网用户设备发送的测量报告后， 根据该测量报告对 是否对专网用户设备执行切换进行判定， 若未达到切换条件， 则判定不切 换； 若达到切换条件， 则判定切换。
204、 接入网设备向专网用户设备发送切换命令；
接入网设备判定对专网用户设备进行切换后， 向专网用户设备发送切 换命令， 使得专网用户设备执行切换程序。
优选的， 测量周期的相关信息可以为指示由专网用户设备自身动态选 择测量周期的信息； 例如：
测量控制消息携带专网用户设备动态地向接入网设备发送测量报告周 期的指示信息， 可以是利用控制信令中的移动控制信元中保留的比特位标 识， 并与所述控制信令一起由接入网设备发送给专网用户设备。 具体的， 可以利用控制信令中的移动控制信元中保留的比特位中的一个比特位来携 带信息， 控制专网用户设备确定邻区测量的测量周期。 例如， 一个比特位 可以表示为： 1为动态获取， 0为静态配置； 专网用户设备接收测量控制消 息后，如果携带的是 1 ,则从交通工具的运行系统中获取当前的运行速度（既 是交通工具比如高铁的运行速度， 也是专网用户设备的运行速度）， 并根据 该运行速度从保存在本地的运行速度和上报测量报告的周期的对应关系表 中获取对应的周期， 如表 2所示：
Figure imgf000011_0001
Figure imgf000011_0002
例如， 当专网用户设备获取的运行速度时速为 300千米时 , 则确定对应 的周期为 80毫秒， 专网用户设备每 80毫秒上报测量报告。
接入网设备获取专网用户设备的实时运行速度， 具体可以由接入网设 备自身测量得到， 也可以由专网用户设备上报。
其中， 接入网设备测量得到专网用户设备的运行速度包括： 接入网设 备获取下行频偏， 然后根据获取的频偏计算出频偏后的频率， 再计算出专 网用户设备运行的速度。
具体的： 在高速运行的网络中， 接入网设备（比如基站）是固定不动 的， 安装在车上的专网用户设备是随车高速运动的， 设基站的速度为 u, 专 网用户设备的速度为 vl , 波的速度为 v2, 波源发出的频率为 fl , 频偏后的频 率为 , 则根据公式： f2=fl x (l+vl/v2)/(l-u/v2)就可以计算出专网用户设 备 vl的大小；
之后， 接入网设备再根据获取的运行速度在本地获取对应的测量周期。 本发明实施例提供的技术方案， 通过测量控制消息实现指示专网用户 设备确定邻区测量的测量周期， 突破了现有协议的限制， 实现测量周期的 可调可控， 从而使得切换时延满足专网场景的通信需求， 提高用户体验。 进一步的， 确定测量周期的方式非常灵活， 比如， 既可以根据专网用 户设备的运行速度对测量周期进行实时调整和控制， 也可以釆用静态配置 的方式可以满足不同场景的具体需求。
实施例三， 请参阅图 3 , 图 3是本发明实施例的交通领域场景切换方法 的流程示意图， 以下将参阅图 3对本发明实施例的切换方法的完整流程做完 整描述。 在该实施例中， 以高铁为应用场景， 相应的， 专网用户设备为车 载专网用户设备。
步骤 301 , 源基站和服务网关交互， 获取区域限制信息；
例如， 源基站在与服务网关建立链接时获取区域限制信息， 或源基站 更新当前时间提前量 TA时， 获取的区域限制信息， 例如， area restrictions information , 并将区域限制信息添加到用户上下文 ( UE context ) 中。
步骤 302, 源基站根据区域限制信息发起用户测量过程， 源基站向车载 专网用户设备发送测量控制命令；
源基站向车载专网用户设备发送测量控制命令， 并利用该测量控制信 令中的移动控制信元中保留的比特位中的两个比特位， 增加了一个测量周 期信息， 该测量周期可以理解为车载用户设备进行邻区测量的周期， 也可 以理解为车载用户设备上报邻区的信号质量的测量报告的周期；
支设场景中高速列车的时速为 450千米， 时延需要减少 100毫秒， 即时 延应该控制在 100毫秒以内， 以保证通话的质量。 这种具体要求下， 可以用 两个比特位 01代表周期为 80毫秒。
步骤 303 , 车载专网用户设备向源基站上报测量报告；
车载专网用户设备接收网络侧的基站发送的携带周期的测量控制信令 后， 由专网用户设备的 RRC层向专网用户设备的 PHY层发送测量控制接口 消息， 该测量控制接口消息携带测量控制信令中携带的周期 01 ;
专网用户设备的 PHY层接收专网用户设备的 RRC层发送的携带周期的 控制接口消息后， 在每 80毫秒内对邻区的信号质量进行测量， 测量完成后， 将测量报告发送给专网用户设备的 RRC层；
专网用户设备的 RRC层接收专网用户设备的 PHY层发送的测量报告 后， 对测量报告进行滤波， 并将测量报告发送给网络侧的源基站。 步骤 304, 源基站根据车载专网用户设备上报的测量报告进行切换判 决；
步骤 305, 源基站向目标基站发送切换请求；
由于车载专网用户设备上报测量报告的时间间隔更短了， 所以， 源基 站在收到测量报告后， 如果符合切换条件判定切换， 就能在更短的时间内 将车载专网用户设备切换到目标基站。 例如， 如果车载专网用户设备上报 的测量报告符合切换条件， 在每 200毫秒对邻区的信号质量进行一次测量， 那么至少要等待 200毫秒后源基站才能向目标基站发送切换请求， 进行切 换； 如果每 80毫秒对邻区的信号质量进行一次测量， 那么就有可能在 80毫 秒后源基站就能向目标基站发送切换请求（ HANDOVER Request ), 进行切 换， 缩短了切换的时间。
步骤 306, 目标基站进行准入控制；
目标基站在收到切换请求后， 如果判定同意切换， 目标基站配置所需 的资源。
步骤 307, 目标基站向源基站返回切换响应消息；
目标基站向源基站返回切换响应消息， 源基站接收到切换请求响应后， 将数据进行转发。
步骤 308, 源基站向车载专网用户设备发送无线资源控制连接重配置消 息；
源基站接收目标基站发送的切换响应消息后， 向车载专网用户设备发 送无线资源控制连接重配置消息， 该消息携带目标小区的前导 Preamble ID 信息；
车载专网用户设备接收无线资源控制连接重配置消息， 根据源基站的 命令执行切换， 断开与源基站的通信， 同步到新小区。 车载专网用户设备 执行切换后向源基站发送混合自动重传 /自动重传响应， 例如： HARQ/ARQ responses。
源基站译放资源并向目标基站传输数据。
步骤 309, 源基站向目标基站发送 SN状态迁移消息；
步骤 310, 车载专网用户设备向目标基站发送无线资源控制连接重配置 完成消息；
当车载专网用户设备成功接入目标小区后， 向目标基站发送无线资源 控制连接重配置完成消息。
步骤 311 , 目标基站向移动管理实体发送路径切换消息；
目标基站向移动管理实体发送路径切换消息， 用于通知车载专网用户 设备已经完成小区切换。
步骤 312, 移动管理实体向服务网关发送更新用户面请求消息。
步骤 313 , 服务网关切换下行数据路径到目标基站， 在原路径向源基站 发送一个或多个终止标识数据， 译放连接源基站的用户面资源。
步骤 314 , 服务网关向移动管理实体发送更新用户面响应消息。
步骤 315 , 移动管理实体向目标基站发送路径切换请求响应消息。
步骤 316, 目标基站向源基站发送用户上下文译放消息。
目标基站接收移动管理实体发送的路径切换响应消息后， 向源基站发 送用户上下文译放消息， 通知源基站切换已经成功， 并触发源基站进行资 源译放。
步骤 317, 源基站进行资源译放；
源基站接收所述用户上下文译放消息后， 源基站译放无线资源和用户 上下文相关的 C-plane控制面资源。
本发明实施例提供的技术方案， 通过测量控制消息实现指示专网用户 设备确定邻区测量的测量周期， 突破了现有协议的限制， 实现测量周期的 可调可控， 从而使得切换时延满足专网场景的通信需求， 提高用户体验。
请参阅图 4, 本发明实施例中专网用户设备的第四实施例， 具体的： 测量控制消息接收模块 401， 用于接收接入网设备发送的测量控制消 息， 该测量控制消息携带测量周期的相关信息， 该测量周期的相关信息用 于指示所述专网用户设备确定邻区测量的测量周期； 测量周期的相关信息 可以为测量周期的具体数值或索引值， 测量周期的具体数值或索引值由接 入网设备确定； 测量周期的相关信息也可以为指示由专网用户设备自身动 态选择测量周期的信息。
测量周期确定模块 402,用于才艮据测量周期的相关信息，确定测量周期； 具体的， 若测量周期的相关信息为测量周期的具体数值时， 该具体数值就 是测量周期； 如果测量周期的相关信息为索引值， 则专网用户设备根据该 索引值在预先保存在本地的运行速度和上报测量报告的周期的对应关系表 中获取对应的测量周期； 如果测量周期的相关信息为指示由专网用户设备 自身动态选择测量周期的信息， 则专网用户设备首先获取当前的运行速度 (既是交通工具比如高铁的运行速度， 也是专网用户设备的运行速度）， 再 根据该运行速度在本地的运行速度和上报测量报告的周期的对应关系表中 获取对应的测量周期。
测量报告获取模块 403 , 用于在测量周期获取模块 402确定的测量周期 内进行邻区测量， 并得到关于邻区信号质量的测量报告。
发送模块 404, 用于向接入网设备发送测量报告， 该测量报告为接入网 设备进行切换判决的依据。 该接入网设备可以根据该测量报告判断切换， 并返回切换命令。
切换命令接收模块 405 , 用于接收接入网设备发送的切换命令， 该切换 命令是接入网设备进行切换判决的结果。
切换模块 406, 用于根据切换命令接收模块 405接收的切换命令进行切 换。
可选的， 测量控制消息接收模块 401发送的测量周期的相关信息为测量 周期的具体数值或索引值， 相应的， 测量周期确定模块 402, 用于将该测量 周期的具体数值或索弓 ]值对应的具体数值， 作为测量周期。
另外， 可选的， 测量控制消息接收模块 401发送的测量周期的相关信息 可以为指示由专网用户设备自身动态选择测量周期的信息； 相应的， 专网 用户设备还包括：
配置模块， 用于配置测量周期与运行速度的对照关系表；
相应的， 测量周期确定模块 402包括：
运行速度获取单元， 用于获取专网用户设备自身的运行速度； 测量周期查找单元， 用于查找测量周期与运行速度的对照关系表， 确 定测量周期。 其中， 专网用户设备的运行速度由专网用户设备自身获取或 者通过接入网设备获取。
测量报告获取模块 403可以包括：
无线资源控制协议层单元， 用于向物理层单元发送测量控制接口消息， 该测量控制接口消息携带测量周期；
物理层单元， 用于在测量周期内进行邻区的信号质量测量， 并生成测 量报告。
本发明实施例提供的技术方案， 通过测量控制消息实现指示专网用户 设备确定邻区测量的测量周期， 突破了现有协议的限制， 实现测量周期的 可调可控， 从而使得切换时延满足专网场景的通信需求， 提高用户体验。
进一步的， 确定测量周期的方式非常灵活， 比如， 既可以根据专网用 户设备的运行速度对测量周期进行实时调整和控制， 也可以釆用静态配置 的方式可以满足不同场景的具体需求。
请参阅图 5 , 本发明实施例中接入网设备的第五实施例， 具体的： 测量控制消息发送模块 501 , 用于向专网用户设备发送测量控制消息， 该测量控制消息携带了测量周期的相关信息， 该测量周期的相关信息用于 指示专网用户设备确定邻区测量的测量周期， 使得专网用户设备在每个该 测量周期内进行一次邻区的信号质量测量并上报测量报告； 测量周期的相 关信息可以为测量周期的具体数值或索引值， 测量周期的具体数值或索弓 ] 值由接入网设备确定； 测量周期的相关信息也可以为指示由专网用户设备 自身动态选择测量周期的信息。
接收模块 502, 用于接收专网用户设备发送的关于邻区信号质量的测量 报告， 该测量报告为专网用户设备在测量周期内进行测量的测量结果。
切换判决模块 503 , 用于根据接收模块接收的测量报告进行切换判决。 切换命令发送模块 504, 用于在切换判决模块判决的结果为是的情况 下， 向专网用户设备发送切换命令， 该切换命令指令所述专网用户设备进 行切换。
测量控制消息发送模块 501发送的测量控制消息为测量周期的具体数 值或索引值时， 相应的， 接入网设备还包括：
获取模块， 用于根据专网用户设备的运行速度平均值或经验值， 确定 测量周期的具体数值或索引值； 或， 根据接入网设备根据运营商要求或现 网需要， 确定测量周期的具体数值或索引值； 或， 根据专网用户设备实时 上报的运行速度， 确定测量周期的具体数值或索引值。
可选的， 接入网设备还可以包括：
获取专网用户设备运行速度模块， 用于获取专网用户设备的运行速度； 具体的， 获取专网用户设备运行速度模块包括： 获取单元， 用于获取下行频偏； 计算单元， 用于根据获取单元获取的 下行频偏计算获得专网用户设备的运行速度。
本发明实施例提供的技术方案， 通过测量控制消息实现指示专网用户 设备确定邻区测量的测量周期， 突破了现有协议的限制， 实现测量周期的 可调可控， 从而使得切换时延满足专网场景的通信需求， 提高用户体验。
进一步的， 确定测量周期的方式非常灵活， 比如， 既可以根据专网用 户设备的运行速度对测量周期进行实时调整和控制， 也可以釆用静态配置 的方式可以满足不同场景的具体需求。
请参阅图 6, 本实施例中切换系统的第五实施例， 该切换系统可以包括 接入网设备 601和专网用户设备 602。 该接入网设备 601可以为上述接入网设 备中描述的接入网设备， 该专网用户设备 602可以为上述专网用户设备实施 例中描述的专网用户设备。 由于前述实施例已经进行了详细描述， 此处不 值得说明的是， 本发明实施例提供的技术方案， 除了用于 LTE系统外， 还可以适用于其他各种通信系统中的类似的应用场景中。 具体的制式可以 包括但不限于： 宽带码分多址（ Wideband Code Division Multiple Access , 简 称 WCDMA ) 或全球移动通信系 统 （ Global System for Mobile Communications , 简称 GSM )或码分多址 (Code Division Multiple Access , 简 称 CDMA)或全球啟波互联接入 (Worldwide Interoperability for Microwave Access , 简称 WiMax)等。
本发明实施例中的接入网设备在各种通信系统中为： 在 LTE系统和 WiMax系统中， 为 eNodeB , 在 GSM系统和 CDMA系统中， 为基站子系统 ( Base Station Subsystem,简称 BSS ), 在 WCDMA系统中， 为无线网络子系 统（ Radio Network Subsystem, 简称 RNS )等。
另外， 本发明实施例的方法实施例描述和设备 /系统实施例描述， 可以 互相参考， 比如， 装置 /系统实施例可以具有相应的模块 /单元以实现方法实 施例中的相应步骤和流程， 反之亦然。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分 步骤是可以通过程序来指令相关的硬件来完成， 该程序可以存储于一计算 机可读存储介质中， 存储介质可以包括： 只读存储器 （ROM, Read Only Memory ), 随机存取存储器（RAM, Random Access Memory )、 磁盘或光盘 等。
以上对本发明实施例所提供的切换方法、 专网用户设备和接入网设备 方式进行了阐述， 以上实施例的说明只是用于帮助理解本发明的方法及其 核心思想； 同时， 对于本领域的一般技术人员， 依据本发明的思想， 在具 体实施方式及应用范围上均会有改变之处， 综上所述， 本说明书内容不应 理解为对本发明的限制。

Claims

权利要求
1、 一种切换方法， 其特征在于， 包括：
专网用户设备接收接入网设备发送的测量控制消息， 所述测量控制消 息携带测量周期的相关信息， 所述测量周期的相关信息用于指示所述专网 用户设备确定邻区测量的测量周期；
所述专网用户设备根据所述测量周期的相关信息， 确定所述测量周期； 所述专网用户设备在所述测量周期内进行邻区测量， 得到关于邻区信 号质量的测量报告；
所述专网用户设备将所述测量报告发送给所述接入网设备， 所述测量 报告为所述接入网设备进行切换判决的依据；
所述专网用户设备接收所述接入网设备发送的切换命令， 所述切换命 令是所述接入网设备进行切换判决的结果；
所述专网用户设备根据所述切换命令进行切换。
2、 根据权利要求 1所述的方法， 其特征在于， 所述测量周期的相关信 息为测量周期的具体数值或索引值， 所述测量周期的具体数值或索引值由 所述接入网设备确定；
相应的， 所述专网用户设备根据所述测量周期的相关信息， 确定所述 测量周期， 包括：
所述专网用户设备将所述测量周期的具体数值或索弓 ]值对应的具体数 值， 作为所述测量周期。
3、 根据权利要求 1所述的方法， 其特征在于， 所述测量周期的相关信 息为指示由所述专网用户设备自身动态选择测量周期的信息；
相应的， 所述专网用户设备根据所述测量周期的相关信息， 确定所述 测量周期， 包括：
所述专网用户设备获取自身的运行速度， 查找测量周期与运行速度的 对照关系表， 确定测量周期， 其中， 所述专网用户设备的运行速度由所述 专网用户设备自身获取或者通过所述接入网设备获取。
4、 根据权利要求 1至 3任一项所述的方法， 其特征在于， 所述专网用户 设备在所述测量周期内进行邻区测量， 得到关于邻区信号质量的测量报告， 包括：
所述专网用户设备的无线资源控制协议层向所述专网用户设备的物理 层发送测量控制接口消息， 所述测量控制接口消息携带所述测量周期； 所述专网用户设备的物理层在所述测量周期内进行邻区信号质量的测 量， 并生成测量报告。
5、 根据权利要求 1至 3任一项所述的方法， 其特征在于， 所述测量周期 的相关信息携带在所述测量控制消息中的移动控制信元中的保留比特中。
6、 一种切换方法， 其特征在于， 包括：
接入网设备向专网用户设备发送测量控制消息， 所述测量控制消息携 带测量周期的相关信息， 所述测量周期的相关信息用于指示所述专网用户 设备确定邻区测量的测量周期；
接收所述专网用户设备发送的关于邻区信号质量的测量报告， 所述测 量才艮告为所述专网用户设备在所述测量周期内进行测量的测量结果；
根据所述测量报告进行切换判决；
在所述判决的结果为是的情况下， 向所述专网用户设备发送切换命令, 所述切换命令指令所述专网用户设备进行切换。
7、 根据权利要求 6所述的方法， 其特征在于， 所述测量周期的相关信 息为测量周期的具体数值或索引值，
所述方法还包括：
所述接入网设备根据所述专网用户设备的运行速度平均值或经验值， 确定所述测量周期的具体数值或索引值； 或，
所述接入网设备根据运营商要求或现网需要， 确定所述测量周期的具 体数值或索引值； 或，
所述接入网设备根据所述专网用户设备实时上报的运行速度， 确定所 述测量周期的具体数值或索引值。
8、 根据权利要求 6所述的方法， 其特征在于， 所述测量周期的相关信 息为指示由所述专网用户设备自身动态选择测量周期的信息。
9、 根据权利要求 6至 8任一项所述的方法， 其特征在于， 所述接入网设 备使用所述测量控制消息中的移动控制信元中的保留比特携带所述测量周 期的相关信息。
10、 一种专网用户设备， 其特征在于， 包括：
测量控制消息接收模块， 用于接收接入网设备发送的测量控制消息， 所述测量控制消息携带测量周期的相关信息， 所述测量周期的相关信息用 于指示所述专网用户设备确定邻区测量的测量周期；
测量周期确定模块， 用于根据所述测量周期的相关信息， 确定所述测 量周期；
测量报告获取模块， 用于在所述测量周期内进行邻区测量， 得到关于 邻区信号质量的测量 4艮告；
发送模块， 用于将所述测量报告发送给所述接入网设备， 所述测量报 告为所述接入网设备进行切换判决的依据；
切换命令接收模块， 用于接收所述接入网设备发送的切换命令， 所述 切换命令是所述接入网设备进行切换判决的结果；
切换模块， 用于根据所述切换命令进行切换。
11、 根据权利要求 10所述的设备， 其特征在于， 所述测量周期的相关 信息为测量周期的具体数值或索引值， 所述测量周期的具体数值或索引值 由所述接入网设备确定；
相应的， 所述测量周期确定模块， 用于将所述测量周期的具体数值或 索引值对应的具体数值， 作为所述测量周期。
12、 根据权利要求 10所述的设备， 其特征在于， 所述测量周期的相关 信息为指示由所述专网用户设备自身动态选择测量周期的信息；
所述设备还包括配置模块， 用于配置测量周期与运行速度的对照关系 表；
相应的， 所述测量周期确定模块包括：
运行速度获取单元， 用于获取专网用户设备自身的运行速度； 测量周期查找单元， 用于查找测量周期与运行速度的对照关系表， 确 定测量周期。
13、 根据权利要求 10至 12任一项所述的设备， 其特征在于， 所述测量 报告获取模块包括： 无线资源控制协议层单元， 用于向所述专网用户设备的物理层单元发 送测量控制接口消息， 所述测量控制接口消息携带所述测量周期；
物理层单元， 用于在所述测量周期内进行邻区的信号质量的测量， 并 生成测量报告。
14、 一种接入网设备， 其特征在于， 包括：
测量控制消息发送模块， 用于向专网用户设备发送测量控制消息， 所 述测量控制消息携带测量周期的相关信息， 所述测量周期的相关信息用于 指示所述专网用户设备确定邻区测量的测量周期；
接收模块， 用于接收所述专网用户设备发送的关于邻区信号质量的测 量报告， 所述测量报告为所述专网用户设备在所述测量周期内进行测量的 测量结果；
切换判决模块， 用于根据所述测量报告进行切换判决；
切换命令发送模块， 用于在所述切换判决模块判决的结果为是的情况 下， 向所述专网用户设备发送切换命令， 所述切换命令指令所述专网用户 设备进行切换。
15、 根据权利要求 14所述的设备， 其特征在于， 所述测量周期的相关 信息为测量周期的具体数值或索引值；
所述设备还包括获取模块， 用于：
根据所述专网用户设备的运行速度平均值或经验值， 确定所述测量周 期的具体数值或索引值； 或，
根据运营商要求或现网需要， 确定所述测量周期的具体数值或索引值； 或，
根据所述专网用户设备实时上报的运行速度， 确定所述测量周期的具 体数值或索引值。
16、 根据权利要求 14所述的设备， 其特征在于， 所述测量周期的相关 信息为指示由所述专网用户设备自身动态选择测量周期的信息。
17、 一种切换系统， 其特征在于， 包括如权 10 - 13任一项所述的专网 用户设备， 和如权 14 - 16任一项所述的接入网设备。
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EP2605575A4 (en) 2013-07-10
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KR20130042020A (ko) 2013-04-25
CN102137424A (zh) 2011-07-27
RU2013114769A (ru) 2014-10-10

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