WO2016205992A1 - 免授权传输的切换方法、终端设备和网络设备 - Google Patents

免授权传输的切换方法、终端设备和网络设备 Download PDF

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Publication number
WO2016205992A1
WO2016205992A1 PCT/CN2015/082036 CN2015082036W WO2016205992A1 WO 2016205992 A1 WO2016205992 A1 WO 2016205992A1 CN 2015082036 W CN2015082036 W CN 2015082036W WO 2016205992 A1 WO2016205992 A1 WO 2016205992A1
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WIPO (PCT)
Prior art keywords
network device
ctu
terminal device
resource
handover
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PCT/CN2015/082036
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English (en)
French (fr)
Inventor
余荣道
Original Assignee
华为技术有限公司
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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 EP15895892.6A priority Critical patent/EP3301970A4/en
Priority to PCT/CN2015/082036 priority patent/WO2016205992A1/zh
Priority to JP2017566738A priority patent/JP6522803B2/ja
Priority to CN201580080019.4A priority patent/CN107615815B/zh
Publication of WO2016205992A1 publication Critical patent/WO2016205992A1/zh
Priority to US15/852,903 priority patent/US10412637B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a method for switching an unauthorized transmission, a terminal device, and a network device.
  • the terminal device when the uplink data needs to be transmitted, the terminal device adopts an uplink scheduling request (SR) mechanism, that is, the terminal device sends an uplink scheduling request to the base station to notify the base station.
  • SR uplink scheduling request
  • the terminal device needs uplink resources for data transmission.
  • the base station After receiving the scheduling request of the terminal device, the base station allocates a certain resource to the terminal device, and the terminal device performs data transmission on the allocated resources.
  • MTC Machine Type Communication
  • Grant Free means that in a Public Land Mobile Network (PLMN), a terminal device does not need to request a base station to allocate resources for data transmission by using a scheduling request method. Grant Free users can directly transmit messages on the Contention Transmission Unit (CTU) according to the characteristics of the transmitted data, such as transmission delay or reliability.
  • PLMN Public Land Mobile Network
  • CTU Contention Transmission Unit
  • the base station (source base station) currently accessed by the terminal device is overloaded or when the channel quality is poor, or when the terminal device enters the coverage area of another base station from the coverage area of one base station
  • the terminal device needs to be handed over from the source base station to another base station (target base station) for unauthorized transmission.
  • Embodiments of the present invention provide a handover method, terminal device, and network design for unauthorized transmission It is possible to switch the terminal device from one network device to another for unauthorized transfer.
  • the first aspect provides a handover method based on the unlicensed transmission, including: the first network device sends a handover request message to the second network device, where the handover request message is used to request to switch the terminal device from the first network device to the first
  • the second network device performs the unlicensed transmission
  • the first network device receives the handover request acknowledgement message sent by the second network device, where the handover request acknowledgement message is used to confirm that the terminal device is switched from the first network device to the second network device for unauthorized transmission.
  • the first network device sends a handover indication message to the terminal device, where the handover indication message is used to indicate that the terminal device transmits the signal to the second network device on the contention transmission unit CTU resource by using the unlicensed transmission mode.
  • the handover request acknowledgement message includes information about a second CTU resource that the second network device allows the terminal device to use, and the handover indication message includes information about the second CTU resource, so that the terminal device adopts an unlicensed transmission mode.
  • a signal is transmitted on the second CTU resource.
  • the handover request message includes information about the first CTU resource used by the terminal device to perform the unlicensed transmission before the handover.
  • the second CTU resource when the second network device allows the terminal device to use the first CTU resource for the unlicensed transmission, the second CTU resource is the same as the first CTU resource. Or, in a case that the second network device does not allow the terminal device to use the first CTU resource for the unlicensed transmission, the second CTU resource is different from the first CTU resource.
  • the handover request message includes information used to indicate that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: the second network device allows the terminal device to use The information of the second CTU resource
  • the handover indication message includes information about the second CTU resource that the second network device allows the terminal device to use, so that the terminal device transmits the signal on the second CTU resource by using an unlicensed transmission mode.
  • the information about the CTU resource includes information about at least one of a time-frequency resource, a code resource, and a pilot, information of a CTU, or a content of a contention access area. information.
  • the method before the first network device sends the handover request message to the second network device, the method further includes: the first network device according to the terminal device Measuring at least one of the report information and the load information of the first network device determines that the terminal device needs to be handed over to the second network device.
  • a handover method based on an unlicensed transmission including: a second network design Receiving, by the first network device, a handover request message, where the handover request message is used to request to switch the terminal device from the first network device to the second network device for unauthorized transmission; and the second network device determines to determine the terminal device from the first network The device switches to the second network device for unauthorized transmission; the second network device sends a handover request acknowledgement message to the first network device, where the handover request acknowledgement message is used to confirm that the terminal device is switched from the first network device to the second network device Unauthorized transmission; the second network device blindly detects the signal transmitted by the terminal device on the CTU resource in an unlicensed transmission mode.
  • the handover request acknowledgement message includes information about a second contention access zone or CTU resource that the second network device allows the terminal device to use, where the handover indication message includes the second contention access zone or the CTU resource.
  • the information is such that the terminal device uses the unlicensed transmission mode to perform an unlicensed transmission signal on the information of the contention access zone or the second CTU resource.
  • the handover request message includes information about a first CTU resource used by the terminal device to perform an unlicensed transmission before the handover, where the second network
  • the signal that the device blind detection terminal device transmits on the CTU resource by using the unlicensed transmission mode includes: the second network device blindly detecting the signal transmitted by the terminal device on the second CTU resource by using the unlicensed transmission mode.
  • the second network device allows the terminal device to use the first CTU resource for the unlicensed transmission
  • the second CTU resource and the second The CTU resource is the same, or the second CTU resource is different from the first CTU resource if the second network device does not allow the terminal device to use the first CTU resource for the unlicensed transmission.
  • the second network device determines to switch the terminal device from the first network device to the second network device for unauthorized transmission.
  • the second network device determines to switch the terminal device to the second network device according to at least one of a load condition of the contention access area of the second network device, a load condition of the second network device, and the first CTU resource.
  • the handover request message includes information for indicating that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: the second network device allows The information of the second CTU resource used by the terminal device, the handover indication message includes information of the second CTU resource that the second network device allows the terminal device to use.
  • the second network device determines to switch the terminal device from the first network device to the second network device
  • Authorizing the transmission comprises: determining to switch the terminal device to the second network device according to at least one of a load condition of the contention access area of the second network device and a load condition of the second network device.
  • the information about the CTU resource includes information about at least one of a time-frequency resource, a code resource, and a pilot, CTU information, or contention. Information about the access area.
  • the third aspect provides a handover method based on the unlicensed transmission, where the terminal device receives the handover indication message sent by the first network device, where the handover indication message is used to indicate that the terminal device switches from the first network device to the second network.
  • the device performs the unlicensed transmission; the terminal device transmits the signal to the second network device on the contention unit CTU resource in an unlicensed transmission manner according to the handover indication message.
  • the terminal device uses the first CTU resource to perform the unlicensed transmission before the handover, and the handover indication message includes the second network device allowing the terminal device The information of the second CTU resource is used, so that the terminal device transmits the signal on the second contention transmission unit CTU resource by using the unlicensed transmission mode.
  • the second network device allows the terminal device to use the first CTU resource for the unlicensed transmission, the second CTU resource and the If the CTU resources are the same, or the second network device does not allow the terminal device to use the first CTU resource for the unlicensed transmission, the second CTU resource is different from the first CTU resource.
  • the terminal device transmits a signal to the second network device on the CTU resource by using an unlicensed transmission mode according to the handover indication message, including: The device determines, according to the information about the second CTU resource carried in the handover indication message, the CTU used by the terminal device to switch to the second network device for unauthorized transmission; the terminal device transmits the signal on the CTU by using an unlicensed transmission mode.
  • the second CTU resource is a contention access area
  • the terminal device determines, according to the information about the second CTU resource carried in the handover indication message
  • the CTU used by the terminal device to switch to the second network device for the unlicensed transmission includes: determining, by the terminal device, the number of CTUs in the contention access zone according to the information of the contention access zone carried in the handover indication message; The following formula determines the CTU:
  • the Indx CTU is the index number of the CTU, mod indicates modulo, N CTU indicates the number of CTUs in the contention access zone, and Sig i indicates the index of the code resources of the terminal device.
  • the information about the CTU resource includes information about at least one of a time-frequency resource, a code resource, and a pilot, CTU information, or a contention. Information about the access area.
  • the fourth aspect provides a network device, including: a sending module, configured to send a handover request message to the second network device, where the handover request message is used to request that the terminal device be handed over from the network device to the second network device for authorization a receiving module, configured to receive a handover request acknowledgement message sent by the second network device, where the handover request acknowledgement message is used to confirm that the terminal device is switched from the network device to the second network device for unauthorized transmission, where the sending module is further used for Sending a handover indication message to the terminal device, where the handover indication message is used to indicate that the terminal device transmits the signal to the second network device on the contention transmission unit CTU resource by using an unlicensed transmission mode.
  • a sending module configured to send a handover request message to the second network device, where the handover request message is used to request that the terminal device be handed over from the network device to the second network device for authorization
  • a receiving module configured to receive a handover request acknowledgement message sent by the second network device, where the handover request acknowledge
  • the handover request acknowledgement message includes information about a second CTU resource that the second network device allows the terminal device to use, and the handover indication message includes information about the second CTU resource, so that the terminal device adopts an unlicensed transmission mode.
  • a signal is transmitted on the second CTU resource.
  • the handover request message includes information about a first CTU resource used by the terminal device to perform an unlicensed transmission before the handover.
  • the second network device allows the terminal device to use the first CTU resource for the unlicensed transmission, the second CTU resource and the If the CTU resources are the same, or the second network device does not allow the terminal device to use the first CTU resource for the unlicensed transmission, the second CTU resource is different from the first CTU resource.
  • the handover request message includes information for indicating that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: the second network device allows And the information about the second CTU resource used by the terminal device, where the handover indication message includes information about the second CTU resource that the second network device allows the terminal device to use, so that the terminal device transmits the signal on the second CTU resource by using an unlicensed transmission mode.
  • the information about the CTU resource includes information about at least one of a time-frequency resource, a code resource, and a pilot, CTU information, or a contention. Information about the access area.
  • the method before the network device sends the handover request message to the second network device, the method further includes: determining, At least one of the measurement report information of the terminal device and the load information of the network device determines that the terminal device needs to be switched to the second network device.
  • the fifth aspect provides a network device, including: a receiving module, configured to receive a handover request message sent by the first network device, where the handover request message is used to request to switch the terminal device from the first network device to the network device to perform the And a determining module, configured to determine that the terminal device is switched from the first network device to the network device for unauthorized transmission; and the sending module is configured to send a handover request acknowledgement message to the first network device, where the handover request acknowledgement message is used for confirming The terminal device is switched from the first network device to the network device for unauthorized transmission; the detecting module is configured to blindly detect the signal transmitted by the terminal device on the CTU resource by using an unlicensed transmission mode.
  • the handover request acknowledgement message includes information about a second contention access zone or CTU resource that the network device allows the terminal device to use, and the handover indication message includes information about the second contention access zone or the CTU resource. Therefore, the terminal device uses the unlicensed transmission mode to perform an unlicensed transmission signal on the information of the contention access zone or the second CTU resource.
  • the handover request message includes information about a first CTU resource used by the terminal device to perform an unlicensed transmission before the handover, where the detection module is based on The second CTU resource blind detection terminal device uses a signal transmitted by the unlicensed transmission mode on the second CTU resource.
  • the second CTU resource and the first CTU are the same, or the second CTU resource is different from the first CTU resource if the network device does not allow the terminal device to use the first CTU resource for the unlicensed transmission.
  • the determining module is configured according to a load condition of a contention access area of the network device, a load condition of the network device, and a first CTU. At least one of the resources determines to switch the terminal device to the network device.
  • the handover request message includes information used to indicate that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: the network device allows the terminal device
  • the information of the second CTU resource used the handover indication message contains information of the second CTU resource that the network device allows the terminal device to use.
  • the determining module determines, according to at least one of a load condition of a contention access area of the network device and a load condition of the network device, The device switches to a network device.
  • the information about the CTU resource includes information about at least one of a time-frequency resource, a code resource, and a pilot, CTU information, or a contention. Information about the access area.
  • the sixth aspect provides a terminal device, including: a receiving module, configured to receive a handover indication message sent by the first network device, where the handover indication message is used to indicate that the terminal device performs handover from the first network device to the second network device.
  • a receiving module configured to receive a handover indication message sent by the first network device, where the handover indication message is used to indicate that the terminal device performs handover from the first network device to the second network device.
  • An unlicensed transmission An unlicensed transmission
  • a sending module configured to transmit a signal to the second network device on the contention unit CTU resource in an unlicensed transmission manner according to the handover indication message.
  • the terminal device uses the first CTU resource to perform the unlicensed transmission before the handover, and the handover indication message includes the second network device allowing the terminal device The information of the second CTU resource is used, so that the terminal device transmits the signal on the second contention transmission unit CTU resource by using the unlicensed transmission mode.
  • the second network device allows the terminal device to use the first CTU resource for the unlicensed transmission, the second CTU resource and the first If the CTU resources are the same, or the second network device does not allow the terminal device to use the first CTU resource for the unlicensed transmission, the second CTU resource is different from the first CTU resource.
  • the terminal device of the sixth aspect further includes: a determining module, configured to use, according to the information about the second CTU resource carried in the handover indication message And determining a CTU used by the terminal device to switch to the second network device for unauthorized transmission, wherein the sending module transmits the signal on the CTU by using an unlicensed transmission mode.
  • the second CTU resource is a contention access area
  • the determining module determines, according to the information of the contention access area carried in the handover indication message, The number of CTUs in the contention access zone
  • the terminal device determines the CTU according to the following formula:
  • the Indx CTU is the index number of the CTU, mod indicates modulo, N CTU indicates the number of CTUs in the contention access zone, and Sig i indicates the index of the code resources of the terminal device.
  • the information about the CTU resource includes information about at least one of a time-frequency resource, a code resource, and a pilot, CTU information, or a contention. Information about the access area.
  • the first network device requests the second network device to switch the terminal device from the first network device to the second network device for unauthorized transmission, and after the second network device allows the handover, instructing the terminal device to adopt The unlicensed transmission mode transmits signals to the second network device on the CTU, thereby realizing the unlicensed transmission of the terminal device from one network device to another.
  • FIG. 1 shows a schematic architectural diagram of a communication system to which an embodiment of the present invention is applied.
  • FIG. 2 is a schematic diagram of a CTU resource definition in accordance with one embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for switching an unlicensed transmission according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a method for switching an unlicensed transmission according to another embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a method for grant-free transmission according to still another embodiment of the present invention.
  • FIG. 6 is a schematic flow chart of a handover procedure based on an unlicensed transmission according to another embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of a handover procedure based on an unlicensed transmission according to another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a network device according to another embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a terminal device according to another embodiment of the present invention.
  • Figure 11 is a schematic block diagram of a network device in accordance with one embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a network device according to another embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a terminal device according to another embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband
  • Code Division Multiple Access GPRS (General Packet Radio Service)
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • the system, the UMTS Universal Mobile Telecommunication System
  • the embodiment of the present invention will be described by taking an LTE network as an example.
  • Embodiments of the present invention can be used in wireless networks of different standards.
  • a wireless access network may include different network elements in different systems.
  • the network elements of the radio access network in LTE and LTE-A include an eNB (eNodeB, an evolved base station), and the network elements of the radio access network in WCDMA include an RNC (Radio Network Controller) and a NodeB, similar to Other wireless networks, such as the WiMax (Worldwide Interoperability for Microwave Access), may use a similar solution to the embodiment of the present invention, but the related modules in the base station system may be different, and the embodiment of the present invention does not.
  • the following embodiments will be described by taking an eNodeB as an example.
  • a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and a computing device can be a component.
  • One or more components can reside within a process and/or execution thread, and the components can be located on one computer and/or distributed between two or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on signals having one or more data packets (eg, data from two components interacting with another component between the local system, the distributed system, and/or the network, such as the Internet interacting with other systems) Communicate through local and/or remote processes.
  • data packets eg, data from two components interacting with another component between the local system, the distributed system, and/or the network, such as the Internet interacting with other systems
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • the present invention describes various embodiments in connection with a terminal device.
  • the terminal device may also refer to a user equipment (User Equipment, referred to as "UE"), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, and a wireless communication.
  • UE User Equipment
  • Device user agent, or user device.
  • the access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol ("SSIP”) phone, a Wireless Local Loop (WLL) station, and a personal digital processing (Personal Digital) Assistant, referred to as "PDA"), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network, or a future evolved PLMN network. Terminal equipment, etc.
  • SSIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Processing
  • the present invention describes various embodiments in connection with a network device.
  • the network device may be a device for communicating with the terminal device, for example, may be a base station (Base Transceiver Station, abbreviated as "BTS") in the GSM system or CDMA, or may be a base station (NodeB in the WCDMA system, referred to as "NB"), which can also be an evolved base station in the LTE system (Evolutional Node B, referred to as "eNB” or "eNodeB” for short, or the network device may be a relay station, an access point, an in-vehicle device, a wearable device, and a network side device in a future 5G network or a network in a future evolved PLMN network. Equipment, etc.
  • the term "article of manufacture” as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or media.
  • the computer readable medium may include, but is not limited to, a magnetic storage device (for example, a hard disk, a floppy disk, or a magnetic tape), and an optical disk (for example, a CD (Compact Disk), a DVD (Digital Versatile Disk). Etc.), smart cards and flash memory devices (eg, EPROM (Erasable Programmable Read-Only Memory), cards, sticks or key drivers, etc.).
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, without limitation, a wireless channel and various other mediums capable of storing, containing, and/or carrying instructions and/or data.
  • the next-generation mobile communication system will not only support traditional communication, but also support M2M (Machine to Machine) communication, or MTC (Machine Type Communication). According to forecasts, by 2020, the number of MTC devices connected to the network will reach 500 to 100 billion, which will far exceed the current number of connections.
  • M2M services due to the wide variety of services, there is a big difference in network requirements.
  • reliable transmission but not sensitive to delay, low delay, high reliability transmission, reliable transmission, and delay-insensitive service, which is easier to handle.
  • V2V Vehicle to Vehicle
  • the source is used for transmission of scheduling signaling related to data transmission of the terminal device.
  • FIG. 1 shows a simplified network diagram.
  • a network device 102 is connected.
  • the network device 102 and a plurality of terminal devices 104-114 are connected by a wireless connection or a wired connection or other means.
  • the network of the patent may refer to a public land mobile network (English full name may be: Public Land Mobile Network, English abbreviation may be: PLMN) network or D2D network or M2M network or other network, FIG. 1 is only a simplified schematic diagram of the network, Other network devices may also be included, which are not shown in FIG.
  • the terminal device in this patent application may also refer to a user equipment (English full name may be: User Equipment, English abbreviation may be: UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal , mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • a user equipment English full name may be: User Equipment, English abbreviation may be: UE
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal , mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (English full name can be: Session Initiation Protocol, English abbreviation can be: SIP) phone, wireless local loop (English full name can be: Wireless Local Loop, English abbreviation can For: WLL) station, personal digital processing (English full name can be: Personal Digital Assistant, English abbreviation can be: PDA), wireless communication capabilities of handheld devices, computing devices or other processing devices connected to wireless modems, automotive devices, A wearable device, a terminal device in a future 5G network, or a terminal device in a future evolved PLMN network.
  • a session initiation protocol English full name can be: Session Initiation Protocol, English abbreviation can be: SIP
  • wireless local loop English full name can be: Wireless Local Loop
  • English abbreviation can For: WLL
  • PDA Personal Digital Assistant
  • wireless communication capabilities of handheld devices computing devices or other processing devices connected to wireless modems
  • automotive devices A wearable device,
  • the network device in this patent application may be a device for communicating with a terminal device, and the network device may be a BTS in GSM or code division multiple access (English full name may be: Code Division Multiple Access, English abbreviation may be CDMA).
  • the full name can be: Base Transceiver Station), or it can be NB in WCDMA (English name can be: NodeB), or it can be cloud wireless access network (English full name can be: Cloud Radio Access Network, English abbreviation can be CRAN)
  • the wireless controller in the scenario may also be an eNB or an eNodeB in LTE (English name may be: Evolutional Node B) or an access point, or an in-vehicle device, a wearable device, a network side device in a future 5G network, or a future evolution.
  • Network devices in the PLMN network may be a BTS in GSM or code division multiple access (English full name may be: Code Division Multiple Access, English abbreviation may be CDMA).
  • the full name can
  • the unlicensed transmission may be: the network device pre-allocates and informs the terminal device of multiple transmission resources; when the terminal device has an uplink data transmission requirement, select at least one transmission resource from the plurality of transmission resources pre-allocated by the network device, and use the selected transmission.
  • the resource sends uplink data; the network device detects uplink data sent by the terminal device on one or more of the pre-assigned multiple transmission resources.
  • the detection may be blind detection, or may be performed according to one of the control domains in the uplink data, or may be detected in other manners.
  • the unlicensed transmission may be: the network device pre-allocates and informs the terminal device of multiple transmission resources, so that when the terminal device has an uplink data transmission requirement, at least one transmission resource is selected from a plurality of transmission resources pre-allocated by the network device, and the selected one is used.
  • the transmission resource sends uplink data.
  • the unlicensed transmission may be: acquiring information of a plurality of pre-assigned transmission resources, selecting at least one transmission resource from the plurality of transmission resources when there is an uplink data transmission requirement, and transmitting the uplink data by using the selected transmission resource.
  • the method of obtaining can be obtained from a network device.
  • the unlicensed transmission may be a method for realizing uplink data transmission of the terminal device without dynamic scheduling of the network device.
  • the dynamic scheduling may refer to the network device indicating the transmission resource by signaling for each uplink data transmission of the terminal device.
  • implementing uplink data transmission of the terminal device may be understood as allowing data of two or more terminal devices to perform uplink data transmission on the same time-frequency resource.
  • the transmission resource may be one or more transmission time units of transmission resources after the time when the UE receives the signaling.
  • a transmission time unit may refer to a minimum time unit for one transmission, such as a TTI (Transmission Time Interval), the value may be 1 ms, or may be a preset transmission time unit.
  • TTI Transmission Time Interval
  • Unauthorized transmission can mean that the terminal device performs uplink data transmission without requiring authorization of the network device.
  • the authorization may be performed by the terminal device sending an uplink scheduling request to the network device. After receiving the scheduling request, the network device sends an uplink grant to the terminal device, where the uplink grant indicates the uplink transmission resource allocated to the terminal device.
  • the unlicensed transmission may be a competitive transmission mode. Specifically, multiple terminals may simultaneously perform uplink data transmission on the same time-frequency resources allocated in advance, without requiring the base station to perform authorization.
  • the data may be included in service data or signaling data.
  • the blind detection can be understood as the detection of data that may arrive without predicting whether or not data has arrived.
  • the blind detection can also be understood as the inspection without explicit signaling indication. Measurement.
  • the transmission resource may include, but is not limited to, a combination of one or more of the following resources: a time domain resource, such as a radio frame, a subframe, a symbol, etc.; a frequency domain resource, such as a subcarrier, a resource block, etc.; a spatial domain resource, such as Sending antennas, beams, etc.; code domain resources, such as sparse code multiple access (English full name: Sparse Code Multiple Access, English abbreviation: SCMA) codebook group, low-density signature (English full name: Low Density Signature, English Referred to as: LDS) group, CDMA code group, etc.; uplink pilot resources.
  • a time domain resource such as a radio frame, a subframe, a symbol, etc.
  • a frequency domain resource such as a subcarrier, a resource block, etc.
  • a spatial domain resource such as Sending antennas, beams, etc.
  • code domain resources such as sparse code multiple access (English full name: Spars
  • the foregoing transmission resource may be transmitted according to a control mechanism including but not limited to: uplink power control, such as uplink transmission power upper limit control, etc.; modulation and coding mode setting, such as transmission block size, code rate, modulation order setting, etc.; Transmission mechanisms, such as the HARQ mechanism.
  • uplink power control such as uplink transmission power upper limit control, etc.
  • modulation and coding mode setting such as transmission block size, code rate, modulation order setting, etc.
  • Transmission mechanisms such as the HARQ mechanism.
  • the contention transmission unit (English name can be: Contention Transmission Unit, English abbreviation can be: CTU) can be the basic transmission resource for unauthorized transmission.
  • a CTU may refer to a transmission resource combining time, frequency, and code domain, or may refer to a combination of time, frequency, and pilot transmission, or may refer to a transmission resource combining time, frequency, code domain, and pilot.
  • the access area of the CTU may refer to a time-frequency area for unauthorized transmission.
  • Patent No. PCT/CN2014/073084 the patent application entitled “System and Method for Uplink Grant-free Transmission Scheme", provides a technical solution for uplink grant-free transmission.
  • the PCT/CN2014/073084 application describes that radio resources can be divided into various CTUs, and the UE is mapped to a certain CTU.
  • Each CTU may be assigned a set of codes, and the assigned set of codes may be a set of CDMA codes, or may be an SCMA codebook set or an LDS group or a signature group.
  • Each code can correspond to a set of pilots. The user can select a code and one of the pilot groups corresponding to the code for uplink transmission.
  • the content of the PCT/CN2014/073084 application is also to be understood as a part of the content of the embodiments of the present invention, and is not described again.
  • FIG. 2 is a schematic diagram of a CTU resource definition in accordance with one embodiment of the present invention.
  • FIG. 2 shows four competing access areas (also referred to as CTU access areas) 210, 220, 230, and 240, while the available bandwidth is divided into four time-frequency regions of competing access areas.
  • Each contention access zone may occupy a predetermined number of resource blocks.
  • the contention access zone 210 includes four RBs: RB1, RB2, RB3, and RB4.
  • RB1, RB2, RB3, and RB4 Embodiments of the invention are not limited in this regard, for example, different contention access zones may include different numbers of RBs.
  • each contention access zone can support 36 UEs competing for 36 CTUs defined in the contention zone, each CTU being a combination of time, frequency, code resources, and pilots.
  • Code resources include multiple code points Code Division Multiple Access (CD) code, or Sparse Code Multiple Access (SCMA) code or Low Density Signature (LDS) or other signature.
  • CD Code Division Multiple Access
  • SCMA Sparse Code Multiple Access
  • LDS Low Density Signature
  • Each contention access area occupies one time-frequency resource area, each time-frequency resource area supports six signatures (S1-S6), and each signature is mapped to 6 pilots, thereby generating a total of 36 pilots (P1- P36).
  • the base station can use a pilot/signature decorrelator to detect or decode signals transmitted by each UE on the CTU.
  • FIG. 2 illustrates four contention access areas, and embodiments of the present invention are not limited thereto, and more or less contention access areas may be defined as needed.
  • FIG. 3 is a schematic flowchart of a method for switching an unlicensed transmission according to an embodiment of the present invention.
  • the method of Figure 3 is performed by the network device (e.g., base station) of Figure 1.
  • the network device e.g., base station
  • the first network device sends a handover request message to the second network device, where the handover request message is used to request that the terminal device be handed over from the first network device to the second network device for unauthorized transmission;
  • the first network device receives a handover request acknowledgement message sent by the second network device, where the handover request acknowledgement message is used to confirm that the terminal device is switched from the first network device to the second network device for unauthorized transmission;
  • the first network device sends a handover indication message to the terminal device, where the handover indication message is used to indicate that the terminal device transmits the signal to the second network device on the CTU resource by using an unlicensed transmission mode.
  • the first network device is a source network device
  • the second network device is a target network device.
  • the terminal device communicates with the first network device by using an unlicensed transmission mode.
  • the terminal device communicates with the second network device in an unlicensed manner.
  • the handover condition eg, the channel quality between the terminal device and the second network device is better than the channel quality between the terminal device and the first network device, or the terminal device enters the second network device from the coverage area of the first network device When the coverage area is)
  • the first network device initiates a handover to the second network device by using a handover request message.
  • the second network device After receiving the handover request message, the second network device sends a handover request acknowledgement message to the first network device when it is determined that the terminal device is allowed to access the second network device by using the unlicensed transmission mode.
  • the first network device sends a handover request indication message to the terminal device when determining that the second network device allows handover according to the handover request message.
  • the terminal device transmits a signal to the second network device on the CTU resource according to the handover request indication message by using an unlicensed transmission mode.
  • the above CTU resources may refer to a contention access zone for unauthorized transmission, and may also refer to competition. Connect to the CTU included in the area.
  • the embodiment according to the present invention is not limited thereto, and the CTU resource may also be at least one of a time-frequency resource, a code resource, and a pilot included in the CTU.
  • a time domain resource may refer to a radio frame, a subframe, a symbol, etc.
  • a frequency domain resource may refer to a subcarrier, a resource block, etc.
  • a code domain resource may refer to a sparse code multiple access (Sparse Code Multiple Access, referred to as "SCMA").
  • SCMA Sparse Code Multiple Access
  • the first network device requests the second network device to switch the terminal device from the first network device to the second network device for unauthorized transmission, and after the second network device allows the handover, instructing the terminal device to adopt The unlicensed transmission mode transmits signals to the second network device on the CTU, thereby realizing the unlicensed transmission of the terminal device from one network device to another.
  • the handover request acknowledgement message includes information of the second CTU resource that the second network device allows the terminal device to use, and the handover indication message includes information of the second CTU resource, so that the terminal device adopts the unlicensed transmission mode in the second The signal is transmitted on the CTU resource.
  • the handover request acknowledgement message and the handover indication message carry information of the CTU resource used by the second network device to allow the terminal device to perform the unlicensed transmission, so that the terminal device determines the CTU according to the information of the CTU resource for the unlicensed transmission. Since the second network device can know in advance the CTU resources used by the terminal device to access the second network device, the unlicensed transmission signal can be quickly demodulated according to the CTU resource, thereby narrowing the scope of blind detection, thereby reducing blindness. The number of detections and reduces the signaling overhead of the handover process.
  • the handover request message may include information of the first CTU resource used by the terminal device to perform the unlicensed transmission before the handover, and the handover request acknowledgement message includes the second CTU resource that the second network device allows the terminal device to use.
  • the handover indication message contains information of the second CTU resource.
  • the second CTU resource in a case where the second network device allows the terminal device to perform the unlicensed transmission by using the first CTU resource, the second CTU resource is the same as the first CTU resource, or the second network device does not allow the terminal device.
  • the first CTU resource is used for the unlicensed transmission, the second CTU resource is different from the first CTU resource.
  • the second network device in a case where the second network device allows the terminal device to access the second network device by using the original CTU resource, the second network device carries the information of the original CTU resource in the handover request acknowledgement message, where the second network device When the terminal device is not allowed to access the second network device by using the original CTU resource, the second network device carries the information of the new CTU resource in the handover request message.
  • the second network device if the second network device The terminal device is not allowed to access the second network device, and the indication message for denying the terminal device access may be carried in the handover request message.
  • the second network device may carry the permission for the terminal device in the handover request acknowledgement message.
  • the information of the new CTU resource is then carried by the first network device in the handover indication message to carry the information of the new CTU, so that the terminal device transmits the signal on the CTU.
  • the first CTU resource comprises a first CTU and the second CTU resource comprises a second CTU.
  • the first network device may carry the original CTU information in the handover request acknowledgement message. If the second network device allows the terminal device to access the second network device by using the original CTU, the original CTU is carried in the handover request acknowledgement message. The information of the new CTU is carried in the handover request message if the second network device does not allow the terminal device to access the second network device by using the original CTU resource.
  • soft handover can be implemented if the second network device allows the UE to still adopt the original CTU during the handover procedure.
  • the first CTU resource comprises a first code resource and the second CTU resource comprises a second code resource.
  • the information of the original code resource is carried in the handover request acknowledgement message, if the second network device does not allow the terminal device to adopt the original code.
  • the information of the new code resource is carried in the handover request message.
  • the handover request message includes information for indicating that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: information that the second network device allows the second CTU resource used by the terminal device, and the handover indication message includes the The second network device allows information of the second CTU resource used by the terminal device, so that the terminal device transmits the signal on the second CTU resource by using an unlicensed transmission mode.
  • the first network device indicates that the terminal device supports the unlicensed transmission in the handover request message, and the second network device receives the handover request message according to the load of the second network device. Or the load condition of the contention access area of the second network device, determining which competing access area the second network device is allowed to be in (for example, a less competitive contention access zone)
  • the domain accesses the second network device, and includes the determined contention access zone in the handover determination message, and then the first network device indicates the contention access zone to the terminal device in the handover indication message.
  • the terminal device selects at least one CTU from the plurality of CTUs of the contention access zone indicated in the handover indication message for unauthorized transmission.
  • the terminal device can flexibly select the CTU according to the contention access area indicated by the second network device, and the second network device can select the less competitive contention access area for the terminal according to the load condition of the second network device.
  • the device accesses or determines whether the terminal device is allowed to access according to the overall load condition, so that the second network device can implement load balancing, and further, because the terminal device can select an appropriate CTU according to the contention access area allowed by the second network device, The probability of collision between unauthorized transmission terminal devices is reduced.
  • the handover request message includes information for indicating that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: information that the second network device allows the CTU used by the terminal device
  • the handover indication message includes the The second network device allows the information of the CTU used by the terminal device, so that the terminal device transmits the signal in the CTU in an unlicensed manner.
  • the first network device merely notifies the second network device terminal device to support the unlicensed transmission, and the second network device provides the terminal device with the CTU accessing the second network device.
  • the information about the CTU resource includes information of at least one of a time-frequency resource, a code resource, and a pilot, information of a CTU, or information of a contention access zone.
  • the method before the first network device sends the handover request message to the second network device, the method further includes: at least the first network device according to the measurement report information of the terminal device and the load information of the first network device One, determining that the terminal device needs to be switched to the second network device.
  • the first network device determines, according to the channel quality information in the measurement report, that the channel quality between the second network device and the terminal device is better than the channel quality between the first network device and the terminal device, determining to switch the terminal device to Second network device. For example, when the first network device determines that the user equipment enters the coverage area of the second network device from the coverage area of the first network device, it is determined to switch the terminal device to the second network device. For another example, when the load of the first network device is too heavy, it is determined to switch the terminal device to the second network device.
  • the embodiment of the present invention is not limited to the foregoing method for handover decision.
  • the signal strength and quality of the communication port may also be monitored by the terminal device.
  • a best candidate network device is selected as the second.
  • the network device initiates a handover request to the first network device.
  • the first network device may determine to switch the terminal device to the second network when receiving the request of the terminal device Network equipment.
  • the core network may require network devices within the jurisdiction to report the signal strength and quality of the communication link, and switch based on the signal strength and quality of the reported communication links.
  • the second network device determines to switch the terminal device to the second network device.
  • FIG. 4 is a schematic flowchart of a method for switching an unlicensed transmission according to another embodiment of the present invention.
  • the method of Figure 4 is performed by the network device (e.g., base station) of Figure 1.
  • the method of FIG. 4 corresponds to the method of FIG. 3, and a detailed description is omitted as appropriate.
  • the second network device receives the handover request message sent by the first network device, where the handover request message is used to request that the terminal device be handed over from the first network device to the second network device for unauthorized transmission;
  • the second network device determines to switch the terminal device from the first network device to the second network device for unauthorized transmission.
  • the second network device sends a handover request acknowledgement message to the first network device, where the handover request acknowledgement message is used to confirm that the terminal device is switched from the first network device to the second network device for unauthorized transfer.
  • the second network device blindly detects that the terminal device transmits the signal on the CTU resource by using an unlicensed transmission mode.
  • the second network device receives the handover request sent by the first network device, and after determining to allow the handover, instructs the terminal device to transmit to the second network device on the CTU by using the first network device by using an unlicensed transmission mode. Signal, thereby enabling the transfer of the terminal device from one network device to another for unauthorized transfer.
  • the handover request acknowledgement message includes information of the second CTU resource that the second network device allows the terminal device to use, and the handover indication message includes information of the second CTU resource, so that the terminal device adopts the unlicensed transmission mode in the second The signal is transmitted on the CTU resource.
  • the handover request message includes information of the first CTU resource used by the terminal device to perform the unlicensed transmission before the handover, where the second network device uses the second CTU resource to detect the terminal device based on the second CTU resource.
  • the signal transmitted by the unlicensed transmission mode on the second CTU resource includes information of the first CTU resource used by the terminal device to perform the unlicensed transmission before the handover, where the second network device uses the second CTU resource to detect the terminal device based on the second CTU resource.
  • the second CTU resource is the same as the first CTU resource, or the second network device does not allow the terminal device Unlicensed transmission using the first CTU resource
  • the second CTU resource is different from the first CTU resource.
  • the first CTU resource comprises a first CTU and the second CTU resource comprises a second CTU.
  • the second network device determines to switch the terminal device to the second network device according to at least one of a load condition of the contention access area of the second network device, a load condition of the second network device, and a first CTU resource.
  • the second network device may preferentially determine whether the CTU resource used before the handover of the terminal device can be used to access the second network device, if the CTU resource is located in the contention access zone. If the load is too heavy, the terminal equipment selects a new CTU resource on the less-competitive contention access zone. If the load of the second network device is too heavy, the terminal device may also be denied access to the second network device.
  • the handover request message includes information for indicating that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: information that the second network device allows the second CTU resource used by the terminal device
  • the handover indication message includes the The second network device allows information of the second CTU resource used by the terminal device.
  • the second network device determines to switch the terminal device to the second network device according to at least one of a load condition of the contention access area of the second network device and a load condition of the second network device.
  • the second network device determines, according to the load condition of the second network device or the load condition of the contention access region of the second network device, which competing access region the second network device is allowed to be (for example, Accessing the second network device, and including the determined contention access zone in the handover determination message, and then indicating, by the first network device, the contention connection to the terminal device in the handover indication message Into the area. If the load of the second network device is too heavy, the terminal device may also be denied access to the second network device.
  • the information of the CTU resource includes information of at least one of a time-frequency resource, a code resource, and a pilot, information of a CTU, or information of a contention access zone.
  • FIG. 5 is a schematic flowchart of a method for grant-free transmission according to still another embodiment of the present invention.
  • the method of Figure 5 is performed by the network device of Figure 1.
  • the method of Figure 5 is performed by the network device (e.g., base station) of Figure 1.
  • the method of FIG. 5 corresponds to the method of FIG. 3, and a detailed description is omitted as appropriate.
  • the terminal device receives a handover indication message sent by the first network device, where the handover indication message is used to indicate that the terminal device switches from the first network device to the second network device for unauthorized transmission. lose;
  • the terminal device transmits a signal to the second network device on the CTU resource by using an unlicensed transmission manner according to the handover indication message.
  • the terminal device performing the unlicensed transmission with the first network device transmits the signal to the second network device on the CTU by using an unlicensed transmission mode, thereby implementing Switching the terminal device from one network device to another for unauthorized transfer.
  • the terminal device uses the first CTU resource to perform the unlicensed transmission before the handover, and the handover indication message includes the information of the second CTU resource that the second network device allows the terminal device to use, so that the terminal device adopts the unlicensed transmission mode.
  • a signal is transmitted on the second CTUCTU resource.
  • the second CTU resource in a case where the second network device allows the terminal device to perform the unlicensed transmission by using the first CTU resource, the second CTU resource is the same as the first CTU resource, or the second network device does not allow the terminal device.
  • the first CTU resource is used for the unlicensed transmission, the second CTU resource is different from the first CTU resource.
  • the terminal device determines, according to the information about the second CTU resource carried in the handover indication message, the CTU used by the terminal device to switch to the second network device for unauthorized transmission;
  • the authorized transmission mode transmits signals on the CTU.
  • the second CTU resource is a contention access area
  • the terminal device may perform the contention according to the handover indication message when determining the CTU used by the terminal device to switch to the second network device for the unlicensed transmission. Enter the information of the area, determine the number of CTUs in the contention access zone, and determine the CTU according to the following formula:
  • the Indx CTU is the index number of the CTU, mod indicates modulo, N CTU indicates the number of CTUs in the contention access zone, and Sig i indicates the index of the code resources of the terminal device.
  • the information of the CTU resource includes information of at least one of a time-frequency resource, a code resource, and a pilot, information of a CTU, or information of a contention access zone.
  • the network device is described by taking a base station as an example.
  • the high layer signaling sent by the base station may be received.
  • the high layer signaling can carry the CTU access area. CTU access region definition, total number of CTUs, default mapping rules, and so on. Alternatively, the default mapping rules can also be pre-configured on the UE.
  • the UE may determine an appropriate CTU from among a plurality of CTUs of the CTU access area to perform an unlicensed transmission on the CTU. Collisions occur when different UEs perform unlicensed transmissions on the same CTU, that is, when they compete for the same CTU. The UE may determine whether there is a collision according to an indication of the base station.
  • the Hybrid Automatic Repeat reQuest (HARQ) method can be used to solve the problem caused by the conflict. If the number of collisions exceeds a predetermined threshold, the base station may be requested to remap the CTU. The base station sends the information of the remapped CTU to the UE, so that the UE performs the unlicensed transmission on the remapped CTU.
  • the UE is handed over from the source base station to another base station (target base station) for unlicensed transmission.
  • FIG. 6 is a schematic flow chart of a handover procedure based on an unlicensed transmission according to another embodiment of the present invention.
  • the process of Figure 6 is an example of the method of Figures 3, 4 and 5. Detailed descriptions are omitted as appropriate herein.
  • the source base station performs a handover decision to determine whether to handover the UE to the target base station.
  • the source base station determines to handover the UE to the target base station according to the measurement report (Measurement Report) information (for example, channel quality information) reported by the UE and/or according to the load information of the source base station (for example, the load of the source base station is too heavy).
  • Measurement Report for example, channel quality information
  • the source base station can send different types of measurement tasks to the UE. For example, measurement control in a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) scenario can be utilized.
  • the measurement configuration is delivered by the message, or the measurement configuration is delivered by using the RRC connection reconfiguration message in the LTE scenario.
  • the UE After receiving the measurement configuration, the UE performs measurement, and sends a corresponding measurement report to the source base station after the measurement result satisfies the reporting condition.
  • the source base station determines whether to perform handover according to the measurement report reported by the terminal.
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • the source base station determines that the channel quality between the target base station and the UE is better than the channel quality between the source base station and the UE according to the channel quality information in the measurement report, it is determined to handover the UE to the target base station.
  • Embodiments of the present invention are not limited thereto, and handover decisions may be made based on other information in the measurement report. For another example, when the load of the first base station is too heavy, it is determined to handover the UE to the target base station.
  • the source base station sends a handover request (Handover Request) message to the target base station, where Request to handover the UE to the target base station.
  • the handover request message carries information of the CTU and/or code resources.
  • the source base station may carry the CTU and/or code resources selected by the UE for unlicensed transmission in the handover request message.
  • the CTU is a basic resource for unauthorized transmission, including but not limited to a combination of time resources, frequency resources, code resources, and pilots.
  • the UE will map to a certain CTU for unauthorized transfer when it is not authorized for transmission.
  • the code resource used by the UE refers to the CDMA code, SCMA code, or LDS or other signature assigned by the network side for the unlicensed transmission of the UE.
  • the source base station may explicitly indicate whether the UE adopts or supports the unlicensed mode transmission through the handover request message. For example, when the source base station determines to handover the UE to the target base station, the source base station may send a handover request message to the target base station, and indicate in the handover request message whether the UE is performing an unlicensed transmission, for example, one cell may be used (Information Element , IE), Capability of Grant Free, to indicate. For example, if the value of the unlicensed transmission capability is 1, it indicates that the UE is using an unlicensed transmission.
  • Information Element IE
  • the embodiment of the present invention is not limited to this, and when the value of the unlicensed transmission capability is 0, it indicates that the UE adopts the unlicensed transmission, or the cell location where the unlicensed transmission capability is located has a value indicating that the UE adopts the unlicensed transmission. .
  • the source base station may also determine whether the UE transmits in the unlicensed mode by whether the handover request message carries the CTU selected by the UE for unlicensed transmission and/or the code resource used by the UE.
  • the following information element (IE: Information Element) may be added to the handover request message from the source base station to the target base station.
  • the target base station After receiving the handover request message of the source base station, the target base station performs access control.
  • the target base station After receiving the handover request message of the source base station, the target base station according to the load condition of the target base station, For example, the load condition of the Contention Access Region (CAR) and/or the load condition of the target base station as a whole and the CTU and/or code resources originally used by the UE determine whether the UE can access the target base station and whether the specific base station can be used. Competing access areas. The UE will be mapped to a specific CTU of a specific contention access area for unauthorized transmission when it is not authorized for transmission.
  • CAR Contention Access Region
  • the target base station may determine whether the UE can access the target base station according to the overall load condition of the target base station. If the overall load of the target base station is too heavy (eg, exceeds a predetermined threshold), the UE is not allowed to access the target base station, otherwise the UE is allowed to access the target base station.
  • the resources of each target base station may be divided into multiple contention access areas, and each contention access area may include one or more CTUs.
  • the CTU is a basic resource for unauthorized transmission, including but not limited to a combination of time resources, frequency resources, code resources, and pilots.
  • the CTU and/or code resources on the new less competitive contention access area are selected, otherwise the original CTU and the original CTU are used. / or code resources.
  • the target base station sends a Handover Request Acknowledge message to the source base station, for confirming that the UE is handed over from the source base station to the target base station for unauthorized transmission.
  • the handover request message carries information of the CTU and/or code resources.
  • the handover request acknowledgement message in 640 indicates that the UE uses the original CTU and/or code resources for unauthorized transmission.
  • the target base station does not allow the UE to access the target base station using the original CTU and/or code resources, the UE is indicated with a new CTU and/or code resource in the 640 Handover Request Acknowledgement message.
  • the following information elements are added to the handover request acknowledgement message from the target base station to the source base station.
  • the source base station sends a handover indication message to the UE, where the UE is instructed to switch to the target base station. That is, the UE is instructed to transmit signals to the target base station on the CTU by using an unlicensed transmission mode.
  • the handover indication message carries information of CTU and/or code resources.
  • the source base station may carry the parameters required for the UE to perform handover in the handover indication message, for example, including radio resources and physical resource configurations such as the ID, target power, CTU, and/or code resources of the target base station.
  • the handover indication message may be implemented by improving or extending existing signaling.
  • the handover indication message may be an RRC CONNECTION RECONFIGURATION message, which is different from a normal RRC connection reconfiguration message.
  • the handover indication message may carry information about the CTU that the target base station allows the UE to access, instead of the frequency point information.
  • the base station may indicate that the UE switches to the target base station through dedicated high layer signaling.
  • the UE performs an unlicensed transmission with the target base station on the CTU.
  • the UE may determine the CTU allowed by the target base station according to the handover indication message, interrupt the connection with the source base station, and map to the CTU allowed by the target base station for unauthorized transmission.
  • a detailed description of the unauthorized transfer is shown in the embodiment of FIG. 2, and details are not described herein again.
  • An advantage of this embodiment is that the target base station can quickly demodulate the UE according to the CTU and/or code resource information, because the target base station knows the CTU and/or code resources used by the UE according to the handover request message sent by the source base station. Unauthorized transmission of data reduces the scope of blind detection, thereby reducing the number of blind detections and reducing the signaling overhead of the handover process. In addition, if the UE still uses the original CTU and/or code resources during the handover process, soft handover can be implemented.
  • FIG. 7 is a schematic flowchart of a handover procedure based on an unlicensed transmission according to another embodiment of the present invention.
  • the process of Figure 7 is an example of the method of Figures 3, 4 and 5. Detailed descriptions are omitted as appropriate herein.
  • the source base station determines to handover the UE to the target base station.
  • the source base station determines to handover the UE to the target base station according to the measurement report (Measurement Report) information (for example, channel quality information) reported by the UE and/or according to the load information of the source base station (for example, the load of the source base station is too heavy). 710 is similar to 610 and will not be described here.
  • Measurement Report for example, channel quality information
  • the source base station sends a handover request (Handover Request) message to the target base station, to request to handover the UE to the target base station.
  • the handover request message carries information of the unlicensed transmission capability.
  • the source base station may send a handover request message to the target base station, and instruct the UE to adopt the unlicensed mode transmission in the handover request message.
  • IE Information Element
  • Capability of Grant Free If the value of the unlicensed transmission capability is 1, it means that the UE uses an unlicensed transmission.
  • the embodiment of the present invention is not limited to this, and when the value of the unlicensed transmission capability is 0, it indicates that the UE adopts the unlicensed transmission, or the cell location where the unlicensed transmission capability is located has a value indicating that the UE adopts the unlicensed transmission. .
  • the following information element (IE: Information Element) may be added to the handover request message from the source base station to the target base station.
  • the target base station After receiving the handover request message of the source base station, the target base station performs access control.
  • the target base station determines, according to the handover request message, that the UE transmits in the unlicensed mode, the target base station according to the load condition of the target base station, for example, the load condition of the contention access zone (CAR) or/and the load condition of the target base station as a whole. And determining whether the UE can access the target base station and whether a specific contention access area can be used.
  • the load condition of the target base station for example, the load condition of the contention access zone (CAR) or/and the load condition of the target base station as a whole.
  • CAR contention access zone
  • each target base station may be divided into multiple contention access areas, and each contention access area may include one or more CTUs.
  • the CTU is a basic resource for unauthorized transmission, including but not limited to a combination of time resources, frequency resources, code resources, and pilots.
  • the UE will be mapped to a specific CTU of a specific contention access area for unauthorized transmission when it is not authorized for transmission.
  • the target base station may determine whether the UE can access the target base station according to the overall load condition of the target base station. If the overall load of the target base station is too heavy (eg, exceeds a predetermined threshold), the UE is not allowed to access the target base station, otherwise the UE is allowed to access the target base station. After determining that the UE is allowed to access, the target base station may further determine the CTU of the contention access zone that the UE is allowed to use according to the load of the contention access zone of the target base station. For example, if the load of a contention access zone is below a predetermined threshold, the target base station allows the UE to use the CTU of the contention access zone.
  • the target base station is determined according to the load condition of the contention access zone or/and the overall load of the target base station If the UE can access the target base station, the competing access area with a lighter load may be selected, and the UE is instructed to access the target base station in the contention access area in 740.
  • the target base station sends a Handover Request Acknowledge message to the source base station to confirm that the UE is handed over from the source base station to the target base station for unlicensed transmission, that is, the source base station is notified that the target base station is ready for unlicensed transmission. resource of.
  • the handover request acknowledges the information carrying the contention access zone.
  • the target base station allows the UE to access the target base station, the handover request acknowledgement message is sent to the source base station, and the contention access area accessible by the UE is indicated in the handover request acknowledgement message.
  • the target base station may carry the information (for example, the identifier or the index) of the contention access area in the handover request acknowledgement message, but the embodiment of the present invention is not limited thereto.
  • the target station may also implicitly adopt a manner agreed by the communication parties. The source base station is notified.
  • the target base station may carry the information of rejecting the UE access target base station in the handover request acknowledgement message. In this way, after receiving the handover request acknowledgement message, the source base station considers that the target base station does not allow the UE to access the target base station, thereby terminating the handover process.
  • the target base station may not make any response to the source base station handover request, such that the source base station still receives the handover request acknowledgement message after the predetermined time expires, It is considered that the target base station does not allow the UE to access the target base station, thereby terminating the handover process.
  • IE Information Element
  • the source base station sends a handover indication message to the UE, to indicate that the UE switches to the target base station, that is, instructs the UE to transmit a signal to the target base station on the CTU by using an unlicensed transmission mode.
  • the handover indication message carries information of the contention access zone.
  • the source base station may carry the parameters required for the UE to perform the handover in the handover indication message, for example, including the target base station ID, the target power, the contention access area, and other radio resources and physical resource configurations.
  • the handover indication message may be implemented by improving or extending existing signaling.
  • the handover indication message may be an RRC CONNECTION RECONFIGURATION message, which is different from a normal RRC connection reconfiguration message.
  • the information of the contention access zone (CAR) that can be accessed may be carried in the handover indication message instead of the frequency point information.
  • Signaling overhead can be saved by improving or extending the RRC connection reconfiguration message.
  • the base station may indicate that the UE switches to the target base station through dedicated high layer signaling.
  • the UE determines a CTU for performing an unlicensed transmission.
  • the UE determines, according to the handover indication message, that the target base station allows the UE to access the target base station, and determines the CTU used for the unlicensed transmission according to the contention access area carried in the handover indication message.
  • the following is an example of a method of determining a CTU for unlicensed transmission.
  • the CTU can be determined according to the default mapping rules.
  • UE available for unlicensed transmission CTU CTU determined according to the index number Indx CTU.
  • the UE may determine the CTU index number Indx CTU according to the following formula:
  • N CTU is the number of CTUs in the contention access zone
  • Sig i is an index of a code resource or signature sequence used by the UE for unlicensed transmission.
  • Sig i may specifically be an index that allocates a dedicated connection signature (DCS) of the UE.
  • DCS dedicated connection signature
  • a suitable CTU may be randomly selected from the available CTUs.
  • the UE performs an unlicensed transmission with the target base station on the CTU.
  • the UE may interrupt the connection with the source base station and map to the selected CTU for unlicensed transmission.
  • a detailed description of the unauthorized transfer is shown in the embodiment of FIG. 2, and details are not described herein again.
  • the advantage of this embodiment is that the UE can flexibly select the CTU according to the contention access area indicated by the target base station, and the target base station can select the less competitive contention access area for the UE to access according to its own load condition or according to the whole.
  • the load condition determines whether the UE is allowed to access, so that the target base station can implement load balancing.
  • the UE can select an appropriate CTU according to the contention access area allowed by the target base station, the probability of collision between the unlicensed transmission UEs is reduced.
  • FIG. 8 is a schematic block diagram of a network device 800 in accordance with one embodiment of the present invention.
  • the network device 800 includes a sending module 810 and a receiving module 820.
  • the sending module 810 is configured to send a handover request message to the second network device, where the handover request message is used to request that the terminal device be handed over from the network device to the second network device for unauthorized transmission.
  • the receiving module 820 is configured to receive a handover request acknowledgement message sent by the second network device, where the handover request acknowledgement message is used to confirm that the terminal device is switched from the network device to the second network device for unauthorized transmission, where the sending module 810 is further used to Sending a handover indication message to the terminal device, where the handover indication message is used to indicate that the terminal device transmits the signal to the second network device on the contention transmission unit CTU resource by using an unlicensed transmission mode.
  • the first network device requests the second network device to switch the terminal device from the first network device to the second network device for unauthorized transmission, and after the second network device allows the handover, instructing the terminal device to adopt The unlicensed transmission mode transmits signals to the second network device on the CTU, thereby realizing the unlicensed transmission of the terminal device from one network device to another.
  • the handover request acknowledgement message includes information of the second CTU resource that the second network device allows the terminal device to use, and the handover indication message includes information of the second CTU resource, so that the terminal device adopts the unlicensed transmission mode in the second The signal is transmitted on the CTU resource.
  • the handover request message includes information of the first CTU resource used by the terminal device to perform the unlicensed transmission before the handover.
  • the second CTU resource in a case where the second network device allows the terminal device to perform the unlicensed transmission by using the first CTU resource, the second CTU resource is the same as the first CTU resource, or the second network device does not allow the terminal device.
  • the first CTU resource is used for the unlicensed transmission, the second CTU resource is different from the first CTU resource.
  • the handover request message includes information for indicating that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: information that the second network device allows the second CTU resource used by the terminal device, and the handover indication message includes the The second network device allows information of the second CTU resource used by the terminal device, so that the terminal device transmits the signal on the second CTU resource by using an unlicensed transmission mode.
  • information of a CTU resource includes a time-frequency resource, a code resource, and a pilot. At least one of the information, the information of the CTU, or the information of the contention access zone.
  • the determining module 830 is configured to: according to at least one of the measurement report information of the terminal device and the load information of the network device, before the network device sends the handover request message to the second network device, It is determined that the terminal device needs to be switched to the second network device.
  • FIG. 9 is a schematic structural diagram of a network device 900 according to another embodiment of the present invention.
  • the network device 900 includes a receiving module 910, a determining module 920, a sending module 930, and a detecting module 940.
  • the receiving module 910 is configured to receive a handover request message sent by the first network device, where the handover request message is used to request that the terminal device be handed over from the first network device to the network device for unauthorized transmission.
  • the determining module 920 is configured to determine to switch the terminal device from the first network device to the network device for unauthorized transfer.
  • the sending module 930 is configured to send a handover request acknowledgement message to the first network device, where the handover request acknowledgement message is used to confirm that the terminal device is switched from the first network device to the network device for unauthorized transfer.
  • the detecting module 940 is configured to blindly detect a signal that the terminal device transmits on the CTU resource by using an unlicensed transmission mode.
  • the second network device receives the handover request sent by the first network device, and after determining to allow the handover, instructs the terminal device to transmit to the second network device on the CTU by using the first network device by using an unlicensed transmission mode. Signal, thereby enabling the transfer of the terminal device from one network device to another for unauthorized transfer.
  • the handover request acknowledgement message includes information of a second contention access zone or CTU resource that the network device allows the terminal device to use, and the handover indication message includes information of the second contention access zone or CTU resource, so that the terminal device
  • the unlicensed transmission mode is used to perform an unlicensed transmission signal on the information of the contention access zone or the second CTU resource.
  • the handover request message includes information of the first CTU resource used by the terminal device to perform the unlicensed transmission before the handover, where the detection module 940 uses the second CTU resource blind detection terminal device to adopt the unlicensed transmission mode.
  • the second CTU resource is the same as the first CTU resource, or The network device does not allow the terminal device to use the first CTU resource for the unlicensed transmission, and the second CTU resource is different from the first CTU resource.
  • the determining module 920 determines to switch the terminal device to the network device according to at least one of a load condition of the contention access area of the network device, a load condition of the network device, and the first CTU resource.
  • the handover request message includes information for indicating that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: information that the network device allows the second CTU resource used by the terminal device
  • the handover indication message includes the network device permission Information about the second CTU resource used by the terminal device.
  • the determining module 920 determines to switch the terminal device to the network device according to at least one of a load condition of the contention access area of the network device and a load condition of the network device.
  • the information of the CTU resource includes information of at least one of a time-frequency resource, a code resource, and a pilot, information of a CTU, or information of a contention access zone.
  • FIG. 10 is a schematic structural diagram of a terminal device 1000 according to another embodiment of the present invention.
  • the terminal device 1000 includes a receiving module 1010 and a transmitting module 1020.
  • the receiving module 1010 is configured to receive a handover indication message sent by the first network device, where the handover indication message is used to indicate that the terminal device switches from the first network device to the second network device for unauthorized transmission.
  • the sending module 1020 is configured to transmit, by using an unlicensed transmission mode, a signal to the second network device on the contention transmission unit CTU resource according to the handover indication message.
  • the terminal device performing the unlicensed transmission with the first network device transmits the signal to the second network device on the CTU by using an unlicensed transmission mode, thereby implementing Switching the terminal device from one network device to another for unauthorized transfer.
  • the terminal device uses the first CTU resource to perform the unlicensed transmission before the handover, and the handover indication message includes the information of the second CTU resource that the second network device allows the terminal device to use, so that the terminal device adopts the unlicensed transmission mode.
  • a signal is transmitted on the second contention transmission unit CTU resource.
  • the second network device allows the terminal device to adopt the first CTU resource If the source performs the unlicensed transmission, the second CTU resource is the same as the first CTU resource, or the second CTU resource and the second network device do not allow the terminal device to use the first CTU resource for the unlicensed transmission.
  • a CTU resource is different.
  • the terminal device 1000 further includes: a determining module 1030, configured to determine, according to information about the second CTU resource carried in the handover indication message, that the terminal device switches to the second network device for unauthorized transmission
  • the second CTU resource is a contention access area
  • the determining module 1030 determines the number of CTUs in the contention access area according to the information of the contention access area carried in the handover indication message
  • the terminal device determines the CTU according to the following formula:
  • the Indx CTU is the index number of the CTU, mod indicates modulo, N CTU indicates the number of CTUs in the contention access zone, and Sig i indicates the index of the code resources of the terminal device.
  • the information of the CTU resource includes information of at least one of a time-frequency resource, a code resource, and a pilot, information of a CTU, or information of a contention access zone.
  • FIG. 11 is a schematic structural diagram of a network device 1100 according to an embodiment of the present invention.
  • Network device 1100 includes a processor 1110, a transceiver 1120, a memory 1130, and a bus 1140.
  • the transceiver 1120 is configured to send a handover request message to the second network device, where the handover request message is used to request that the terminal device be handed over from the network device to the second network device for unauthorized transmission.
  • the transceiver 1120 is further configured to receive a handover request acknowledgement message sent by the second network device, where the handover request acknowledgement message is used to confirm that the terminal device is switched from the network device to the second network device for unauthorized transfer.
  • the transceiver 1120 is further configured to send a handover indication message to the terminal device, where the handover indication message is used to indicate that the terminal device transmits the signal to the second network device on the contention transmission unit CTU resource by using an unlicensed transmission mode.
  • the first network device requests the second network device to switch the terminal device from the first network device to the second network device for unauthorized transmission, and after the second network device allows the handover, instructing the terminal device to adopt The unlicensed transmission mode transmits signals to the second network device on the CTU, thereby realizing the handover of the terminal device from one network device to another Authorized transfer.
  • the handover request acknowledgement message includes information of the second CTU resource that the second network device allows the terminal device to use, and the handover indication message includes information of the second CTU resource, so that the terminal device adopts the unlicensed transmission mode in the second The signal is transmitted on the CTU resource.
  • the handover request message includes information of the first CTU resource used by the terminal device to perform the unlicensed transmission before the handover.
  • the second CTU resource in a case where the second network device allows the terminal device to perform the unlicensed transmission by using the first CTU resource, the second CTU resource is the same as the first CTU resource, or the second network device does not allow the terminal device.
  • the first CTU resource is used for the unlicensed transmission, the second CTU resource is different from the first CTU resource.
  • the handover request message includes information for indicating that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: information that the second network device allows the second CTU resource used by the terminal device, and the handover indication message includes the The second network device allows information of the second CTU resource used by the terminal device, so that the terminal device transmits the signal on the second CTU resource by using an unlicensed transmission mode.
  • the information of the CTU resource includes information of at least one of a time-frequency resource, a code resource, and a pilot, information of a CTU, or information of a contention access zone.
  • the processor 1110 is configured to determine, according to at least one of the measurement report information of the terminal device and the load information of the network device, before the network device sends the handover request message to the second network device, The device switches to the second network device.
  • FIG. 12 is a schematic structural diagram of a network device 1200 according to another embodiment of the present invention.
  • Network device 1200 includes a processor 1210, a transceiver 1220, a memory 1230, and a bus 1240.
  • the transceiver 1220 is configured to receive a handover request message sent by the first network device, where the handover request message is used to request that the terminal device be handed over from the first network device to the network device for unauthorized transmission.
  • the processor 1210 is configured to invoke code stored in the memory 1230 to determine to switch the terminal device from the first network device to the network device for unauthorized transfer.
  • the transceiver 1220 is further configured to send a handover request acknowledgement message to the first network device, where the handover request acknowledgement message is used to confirm that the terminal device is switched from the first network device to the network device. Authorized transfer.
  • the process 1210 is also used to blindly detect a signal transmitted by the terminal device on the CTU resource by using an unlicensed transmission mode.
  • the second network device receives the handover request sent by the first network device, and after determining to allow the handover, instructs the terminal device to transmit to the second network device on the CTU by using the first network device by using an unlicensed transmission mode. Signal, thereby enabling the transfer of the terminal device from one network device to another for unauthorized transfer.
  • the handover request acknowledgement message includes information of a second contention access zone or CTU resource that the network device allows the terminal device to use, and the handover indication message includes information of the second contention access zone or CTU resource, so that the terminal device
  • the unlicensed transmission mode is used to perform an unlicensed transmission signal on the information of the contention access zone or the second CTU resource.
  • the handover request message includes information of the first CTU resource used by the terminal device to perform the unlicensed transmission before the handover, where the processor 1210 uses the second CTU resource blind detection terminal device to adopt the unlicensed transmission mode.
  • the signal transmitted on the two CTU resources includes information of the first CTU resource used by the terminal device to perform the unlicensed transmission before the handover, where the processor 1210 uses the second CTU resource blind detection terminal device to adopt the unlicensed transmission mode.
  • the second CTU resource is the same as the first CTU resource, or the network device does not allow the terminal device to use the first CTU.
  • the second CTU resource is different from the first CTU resource.
  • the processor 1210 determines to switch the terminal device to the network device according to at least one of a load condition of the contention access area of the network device, a load condition of the network device, and the first CTU resource.
  • the handover request message includes information for indicating that the terminal device supports the unlicensed transmission
  • the handover request acknowledgement message includes: information that the network device allows the second CTU resource used by the terminal device
  • the handover indication message includes the network device permission Information about the second CTU resource used by the terminal device.
  • the processor 1210 determines to switch the terminal device to the network device according to at least one of a load condition of the contention access area of the network device and a load condition of the network device.
  • the information of the CTU resource includes information of at least one of a time-frequency resource, a code resource, and a pilot, information of a CTU, or information of a contention access zone.
  • FIG. 13 is a schematic structural diagram of a terminal device 1300 according to another embodiment of the present invention.
  • the terminal device 1300 includes a processor 1310, a transceiver 1320, a memory 1330, and a bus 1340.
  • the transceiver 1320 is configured to receive a handover indication message sent by the first network device, where the handover indication message is used to indicate that the terminal device switches from the first network device to the second network device for unauthorized transmission.
  • the transceiver 1320 is further configured to transmit a signal to the second network device on the contention transmission unit CTU resource by using an unlicensed transmission manner according to the handover indication message.
  • the terminal device performing the unlicensed transmission with the first network device transmits the signal to the second network device on the CTU by using an unlicensed transmission mode, thereby implementing Switching the terminal device from one network device to another for unauthorized transfer.
  • the terminal device uses the first CTU resource to perform the unlicensed transmission before the handover, and the handover indication message includes the information of the second CTU resource that the second network device allows the terminal device to use, so that the terminal device adopts the unlicensed transmission mode.
  • a signal is transmitted on the second contention transmission unit CTU resource.
  • the second CTU resource in a case where the second network device allows the terminal device to perform the unlicensed transmission by using the first CTU resource, the second CTU resource is the same as the first CTU resource, or the second network device does not allow the terminal device.
  • the first CTU resource is used for the unlicensed transmission, the second CTU resource is different from the first CTU resource.
  • the processor 1310 is configured to determine, according to information about the second CTU resource carried in the handover indication message, a CTU used by the terminal device to switch to the second network device for unlicensed transmission, where The device 1320 transmits signals on the CTU using an unlicensed transmission.
  • the second CTU resource is a contention access area
  • the processor 1310 determines the number of CTUs in the contention access area according to the information of the contention access area carried in the handover indication message
  • the terminal device determines the CTU according to the following formula:
  • the Indx CTU is the index number of the CTU, mod indicates modulo, N CTU indicates the number of CTUs in the contention access zone, and Sig i indicates the index of the code resources of the terminal device.
  • the information of the CTU resource includes information of at least one of a time-frequency resource, a code resource, and a pilot, information of a CTU, or information of a contention access zone.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including Several instructions are used to make a computer device (which can be a personal computer, a server, Or a network device or the like) performing all or part of the steps of the method of the various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .
  • the sending module or the sending unit or the transmitter in the above embodiment may refer to sending on the air interface, but may not be sent on the air interface, but sent to other devices to facilitate other devices to send on the air interface.
  • the receiving module or the receiving unit or the receiver in the above embodiment may refer to receiving on the air interface, and may not receive on the air interface, but receive from other devices received on the air interface.

Abstract

本发明提供了一种免授权传输的切换方法、终端设备和网络设备。该切换方法包括：第一网络设备向第二网络设备发送切换请求消息，其中切换请求消息用于请求将终端设备从第一网络设备切换至第二网络设备进行免授权传输；第一网络设备接收第二网络设备发送的切换请求确认消息，其中切换请求确认消息用于确认将终端设备从第一网络设备切换至第二网络设备进行免授权传输；第一网络设备向终端设备发送切换指示消息，其中切换指示消息用于指示终端设备采用免授权传输方式在CTU资源上向第二网络设备传输信号。本发明的技术方案实现了将终端设备从一个网络设备切换至另一网络设备进行免授权传输。

Description

免授权传输的切换方法、终端设备和网络设备 技术领域
本发明的实施例涉及通信技术领域，尤其涉及一种免授权传输的切换方法、终端设备和网络设备。
背景技术
在现有的长期演进(Long Term Evolution，LTE)系统中，当需要传输上行数据时，终端设备采用上行调度请求(Scheduling Request，SR)机制，即终端设备通过发送上行调度请求给基站，告知基站终端设备需要上行资源进行数据传输。基站接收到终端设备的调度请求后，给终端设备分配一定的资源，终端设备在这些分配的资源上进行数据传输。
随着物联网的发展，出现了越来越多的机器类型通信(Machine Type Communication，MTC)类型业务。MTC类型业务一般数据包比较小，而且要求传输时延也比较小。当有大量的MTC类型业务时，上述的调度请求机制一方面会带来大量的信令开销，另一方面也会带来传输时延。
为了解决上述问题，已经提出了一种上行免授权(Grant Free)的技术方案。Grant Free是指在公共陆地移动网络(Public Land Mobile Network，PLMN)中，终端设备无需通过调度请求方式请求基站分配资源进行数据传输。Grant Free用户可以根据传输数据的特点的不同，如传输时延或可靠性的要求，直接在竞争传输资源(Contention Transmission Unit，CTU)上传输报文。
然而，在某些场景下，例如，终端设备当前接入的基站(源基站)的负载过重时或者信道质量较差时，或者终端设备从一个基站的覆盖区域进入另一个基站的覆盖区域时，需要将终端设备从源基站切换至另一基站(目标基站)进行免授权传输。
因此，如何将终端设备从一个基站切换至另一基站进行免授权传输是亟待解决的问题。
发明内容
本发明的实施例提供了一种免授权传输的切换方法、终端设备和网络设 备，能够将终端设备从一个网络设备切换至另一网络设备进行免授权传输。
第一方面，提供了一种基于免授权传输的切换方法，包括：第一网络设备向第二网络设备发送切换请求消息，其中切换请求消息用于请求将终端设备从第一网络设备切换至第二网络设备进行免授权传输；第一网络设备接收第二网络设备发送的切换请求确认消息，其中切换请求确认消息用于确认将终端设备从第一网络设备切换至第二网络设备进行免授权传输；第一网络设备向终端设备发送切换指示消息，其中切换指示消息用于指示终端设备采用免授权传输方式在竞争传输单元CTU资源上向第二网络设备传输信号。
在第一种可能的实现方式中，切换请求确认消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
结合第一种可能的实现方式，在第二种可能的实现方式中，切换请求消息包含终端设备在切换前进行免授权传输所采用的第一CTU资源的信息。
结合第二种可能的实现方式，在第三种可能的实现方式中，在第二网络设备允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
结合第一种可能的实现方式，在第四种可能的实现方式中，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
结合上述任何一种可能的实现方式，在第五种可能的实现方式中，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
结合第一方面或上述任何一种可能的实现方式，在第六种可能的实现方式中，第一网络设备向第二网络设备发送切换请求消息之前，还包括：第一网络设备根据终端设备的测量报告信息和第一网络设备的负载信息中的至少一个，确定需要将终端设备切换到第二网络设备。
第二方面，提供了一种基于免授权传输的切换方法，包括：第二网络设 备接收第一网络设备发送的切换请求消息，其中切换请求消息用于请求将终端设备从第一网络设备切换至第二网络设备进行免授权传输；第二网络设备确定将终端设备从第一网络设备切换至第二网络设备进行免授权传输；第二网络设备向第一网络设备发送切换请求确认消息，其中切换请求确认消息用于确认将终端设备从第一网络设备切换至第二网络设备进行免授权传输；第二网络设备盲检测终端设备采用免授权传输方式在CTU资源上传输的信号。
在第一种可能的实现方式中，切换请求确认消息包含第二网络设备允许终端设备使用的第二竞争接入区域或CTU资源的信息，切换指示消息包含第二竞争接入区域或CTU资源的信息，以便终端设备采用免授权传输方式使用在竞争接入区域或第二CTU资源的信息上进行免授权传输信号。
结合第二方面的第一种可能的实现方式，在第二种可能的实现方式中，切换请求消息包含终端设备在切换前进行免授权传输所使用的第一CTU资源的信息，其中第二网络设备盲检测终端设备采用免授权传输方式在CTU资源上传输的信号，包括：第二网络设备基于第二CTU资源盲检测终端设备采用免授权传输方式在第二CTU资源上传输的信号。
结合第二方面的第二种可能的实现方式，在第三种可能的实现方式中，在第二网络设备允许终端设备使用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备使用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
结合第二方面的第二种或第三种可能的实现方式，在第四种可能的实现方式中，第二网络设备确定将终端设备从第一网络设备切换至第二网络设备进行免授权传输，包括：第二网络设备根据第二网络设备的竞争接入区域的负载情况、第二网络设备的负载情况以及第一CTU资源中的至少一个，确定将终端设备切换到第二网络设备。
结合第二方面的第一种可能的实现方式，在第五种可能的实现方式中，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二网络设备允许终端设备使用的第二CTU资源的信息。
结合第二方面的第五种可能的实现方式，在第六种可能的实现方式中，第二网络设备确定将终端设备从第一网络设备切换至第二网络设备进行免 授权传输，包括：根据第二网络设备的竞争接入区域的负载情况和第二网络设备的负载情况中的至少一个，确定将终端设备切换到第二网络设备。
结合第二方面的上述任何一种可能的实现方式，在第七种可能的实现方式中，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
第三方面，提供了一种基于免授权传输的切换方法，包括：终端设备接收第一网络设备发送的切换指示消息，其中切换指示消息用于指示终端设备从第一网络设备切换至第二网络设备进行免授权传输；终端设备根据切换指示消息，采用免授权传输方式在竞争传输单元CTU资源上向第二网络设备传输信号。
结合第二方面的上述任何一种可能的实现方式，在第七种可能的实现方式中，终端设备在切换前采用第一CTU资源进行免授权传输，切换指示消息包含第二网络设备允许终端设备采用的第二CTU资源的信息，以便终端设备采用免授传输方式在第二竞争传输单元CTU资源上传输信号。
结合第三方面的第一种可能的实现方式，在第二种可能的实现方式中，在第二网络设备允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
结合第三方面的第一种可能的实现方式，在第三种可能的实现方式中，终端设备根据切换指示消息，采用免授权传输方式在CTU资源上向第二网络设备传输信号，包括：终端设备根据切换指示消息中携带的第二CTU资源的信息，确定终端设备切换至第二网络设备进行免授权传输时所使用的CTU；终端设备采用免授权传输方式在CTU上传输信号。
结合第三方面的第三种可能的实现方式，在第四种可能的实现方式中，第二CTU资源为竞争接入区域，终端设备根据切换指示消息中携带的第二CTU资源的信息，确定终端设备切换至第二网络设备进行免授权传输时所使用的CTU，包括：终端设备根据切换指示消息中携带的竞争接入区域的信息，确定竞争接入区域中的CTU的数目；终端设备根据下列公式确定CTU：
IndxCTU＝Sigi modNCTU
其中IndxCTU为CTU的索引号，mod表示取模，NCTU表示竞争接入区域中的CTU的数目，Sigi表示终端设备的码资源的索引。
结合第三方面的上述任何一种可能的实现方式，在第五种可能的实现方式中，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
第四方面，提供了一种网络设备，包括：发送模块，用于向第二网络设备发送切换请求消息，其中切换请求消息用于请求将终端设备从网络设备切换至第二网络设备进行免授权传输；接收模块，用于接收第二网络设备发送的切换请求确认消息，其中切换请求确认消息用于确认将终端设备从网络设备切换至第二网络设备进行免授权传输，其中发送模块还用于向终端设备发送切换指示消息，其中切换指示消息用于指示终端设备采用免授权传输方式在竞争传输单元CTU资源上向第二网络设备传输信号。
在第一种可能的实现方式中，切换请求确认消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
结合第四方面的第一种可能的实现方式，在第二种可能的实现方式中，切换请求消息包含终端设备在切换前进行免授权传输所采用的第一CTU资源的信息。
结合第四方面的第二种可能的实现方式，在第三种可能的实现方式中，在第二网络设备允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
结合第四方面的第一种可能的实现方式，在第四种可能的实现方式中，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
结合第四方面的上述任何一种可能的实现方式，在第五种可能的实现方式中，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
结合第四方面或第四方面的上述任何一种可能的实现方式，在第六种可能的实现方式中，网络设备向第二网络设备发送切换请求消息之前，还包括：确定模块，用于根据终端设备的测量报告信息和网络设备的负载信息中的至少一个，确定需要将终端设备切换到第二网络设备。
第五方面，提供了一种网络设备，包括：接收模块，用于接收第一网络设备发送的切换请求消息，其中切换请求消息用于请求将终端设备从第一网络设备切换至网络设备进行免授权传输；确定模块，用于确定将终端设备从第一网络设备切换至网络设备进行免授权传输；发送模块，用于向第一网络设备发送切换请求确认消息，其中切换请求确认消息用于确认将终端设备从第一网络设备切换至网络设备进行免授权传输；检测模块，用于盲检测终端设备采用免授权传输方式在CTU资源上传输的信号。
在第一种可能的实现方式中，切换请求确认消息包含网络设备允许终端设备使用的第二竞争接入区域或CTU资源的信息，切换指示消息包含第二竞争接入区域或CTU资源的信息，以便终端设备采用免授权传输方式使用在竞争接入区域或第二CTU资源的信息上进行免授权传输信号。
结合第五方面的第一种可能的实现方式，在第二种可能的实现方式中，切换请求消息包含终端设备在切换前进行免授权传输所使用的第一CTU资源的信息，其中检测模块基于第二CTU资源盲检测终端设备采用免授权传输方式在第二CTU资源上传输的信号。
结合第五方面的第二种可能的实现方式，在第三种可能的实现方式中，在网络设备允许终端设备使用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在网络设备不允许终端设备使用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
结合第五方面的第二种或第三种可能的实现方式，在第四种可能的实现方式中，确定模块根据网络设备的竞争接入区域的负载情况、网络设备的负载情况以及第一CTU资源中的至少一个，确定将终端设备切换到网络设备。
结合第五方面的第一种可能的实现方式，在第五种可能的实现方式中，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含网络设备允许终端设备使用的第二CTU资源的信息。
结合第五方面的第五种可能的实现方式，在第六种可能的实现方式中，确定模块根据网络设备的竞争接入区域的负载情况和网络设备的负载情况中的至少一个，确定将终端设备切换到网络设备。
结合第五方面的上述任何一种可能的实现方式，在第七种可能的实现方式中，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
第六方面，提供了一种终端设备，包括：接收模块，用于接收第一网络设备发送的切换指示消息，其中切换指示消息用于指示终端设备从第一网络设备切换至第二网络设备进行免授权传输；发送模块，用于根据切换指示消息，采用免授权传输方式在竞争传输单元CTU资源上向第二网络设备传输信号。
结合第二方面的上述任何一种可能的实现方式，在第七种可能的实现方式中，终端设备在切换前采用第一CTU资源进行免授权传输，切换指示消息包含第二网络设备允许终端设备采用的第二CTU资源的信息，以便终端设备采用免授传输方式在第二竞争传输单元CTU资源上传输信号。
结合第六方面的第一种可能的实现方式，在第二种可能的实现方式中，在第二网络设备允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
结合第六方面的第一种可能的实现方式，在第三种可能的实现方式中，第六方面的终端设备还包括：确定模块，用于根据切换指示消息中携带的第二CTU资源的信息，确定终端设备切换至第二网络设备进行免授权传输时所使用的CTU，其中发送模块采用免授权传输方式在CTU上传输信号。
结合第六方面的第三种可能的实现方式，在第四种可能的实现方式中，第二CTU资源为竞争接入区域，确定模块根据切换指示消息中携带的竞争接入区域的信息，确定竞争接入区域中的CTU的数目；
终端设备根据下列公式确定CTU：
IndxCTU＝Sigi modNCTU
其中IndxCTU为CTU的索引号，mod表示取模，NCTU表示竞争接入区域 中的CTU的数目，Sigi表示终端设备的码资源的索引。
结合第六方面的上述任何一种可能的实现方式，在第五种可能的实现方式中，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
基于本发明的技术方案，第一网络设备向第二网络设备请求将终端设备从第一网络设备切换至第二网络设备进行免授权传输，并在第二网络设备允许切换之后，指示终端设备采用免授权传输方式在CTU上向第二网络设备传输信号，从而实现了将终端设备从一个网络设备切换至另一网络设备进行免授权传输。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，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1示出了应用本发明实施例的一种通信系统的示意性架构图。
图2是根据本发明的一个实施例的CTU资源定义的示意图。
图3是根据本发明的一个实施例的免授权传输的切换方法的示意性流程图。
图4是根据本发明的另一实施例的免授权传输的切换方法的示意性流程图。
图5是根据本发明的又一实施例的免授权传输的方法的示意性流程图。
图6是根据本发明的另一实施例的基于免授权传输的切换过程的示意性流程图。
图7是根据本发明的另一实施例的基于免授权传输的切换过程的示意性流程图。
图8是根据本发明的一个实施例的网络设备的示意性结构图。
图9是根据本发明的另一实施例的网络设备的示意性结构图。
图10是根据本发明的另一实施例的终端设备的示意性结构图。
图11是根据本发明的一个实施例的网络设备的示意性结构图。
图12是根据本发明的另一实施例的网络设备的示意性结构图。
图13是根据本发明的另一实施例的终端设备的示意性结构图。
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。
应理解，本发明的技术方案可以应用于各种通信系统，例如：GSM(Global System of Mobile communication，全球移动通讯)系统、CDMA(Code Division Multiple Access，码分多址)系统、WCDMA(，Wideband Code Division Multiple Access，宽带码分多址)系统、GPRS(General Packet Radio Service，通用分组无线业务)、LTE(Long Term Evolution，长期演进)系统、LTE-A(Advanced long term evolution，先进的长期演进)系统、UMTS(Universal Mobile Telecommunication System，通用移动通信系统)等，本发明实施例并不限定，但为描述方便，本发明实施例将以LTE网络为例进行说明。
本发明实施例可以用于不同的制式的无线网络。无线接入网络在不同的系统中可包括不同的网元。例如，LTE和LTE-A中无线接入网络的网元包括eNB(eNodeB，演进型基站)，WCDMA中无线接入网络的网元包括RNC(Radio Network Controller，无线网络控制器)和NodeB，类似地，WiMax(Worldwide Interoperability for Microwave Access，全球微波互联接入)等其它无线网络也可以使用与本发明实施例类似的方案，只是基站系统中的相关模块可能有所不同，本发明实施例并不限定，但为描述方便，下述实施例将以eNodeB为例进行说明。
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，所描述的实施例是本发明的一部分实施例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都应属于本发明保护的范围。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
应理解，本发明实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile Communication，简称为“GSM”)系统、码分多址(Code Division Multiple Access，简称为“CDMA”)系统、宽带码分多址(Wideband Code Division Multiple Access，简称为“WCDMA”)系统、长期演进(Long Term Evolution，简称为“LTE”)系统、LTE频分双工(Frequency Division Duplex，简称为“FDD”)系统、LTE时分双工(Time Division Duplex，简称为“TDD”)、通用移动通信系统(Universal Mobile Telecommunication System，简称为“UMTS”)、以及未来的5G通信系统等。
本发明结合终端设备描述了各个实施例。终端设备也可以指用户设备(User Equipment，简称为“UE”)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，简称为“SIP”)电话、无线本地环路(Wireless Local Loop，简称为“WLL”)站、个人数字处理(Personal Digital Assistant，简称为“PDA”)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的PLMN网络中的终端设备等。
本发明结合网络设备描述了各个实施例。网络设备可以是用于与终端设备进行通信的设备，例如，可以是GSM系统或CDMA中的基站(Base Transceiver Station，简称为“BTS”)，也可以是WCDMA系统中的基站(NodeB，简称为“NB”)，还可以是LTE系统中的演进型基站(Evolutional  Node B，简称为“eNB”或“eNodeB”)，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的网络侧设备或未来演进的PLMN网络中的网络设备等。
此外，本发明的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于:磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，CD(Compact Disk，压缩盘)、DVD(Digital Versatile Disk，数字通用盘)等)，智能卡和闪存器件(例如，EPROM(Erasable Programmable Read-Only Memory，可擦写可编程只读存储器)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
现有的蜂窝通信系统，如全球移动通讯(英文全称可以为：Global System for Mobile Communication，英文简称可以为：GSM),宽带码分多址(英文全称可以为：Wideband Code Division Multiple Access，英文简称可以为：WCDMA),长期演进(英文全称可以为：Long Term Evolution，英文简称可以为：LTE)等系统中，所支持的通信主要是针对语音和数据通信的。通常来说，一个传统基站支持的连接数有限，也易于实现。
下一代移动通信系统将不仅支持传统的通信，还将支持M2M(英文全称可以为：Machine to Machine)通信，或者叫做MTC(英文全称可以为：Machine Type Communication)通信。根据预测，到2020年，连接在网络上的MTC设备将会达到500到1000亿，这将远超现在的连接数。对M2M类业务，由于其业务种类千差万别，对网络需求存在很大差异。大致来说，会存在如下几种需求：可靠传输，但对时延不敏感，低延迟，高可靠传输，对可靠传输，而对时延不敏感业务，较容易处理。但是，对低延迟、高可靠传输类的业务，不仅要求传输时延短，而且要求可靠，比如V2V(英文全称为：Vehicle to Vehicle)业务。如果传输不可靠，会导致重传而造成传输时延过大，不能满足要求。
由于大量连接的存在，使得未来的无线通信系统和现有的通信系统存在很大差异。大连接需要消耗更多的资源接入终端设备以及需要消耗更多的资 源用于终端设备的数据传输相关的调度信令的传输。
图1给出了简化的网络示意图，在网络100中举例地有一个网络设备102，网络设备102和若干终端设备104-114(图中简称为UE)通过无线连接或有线连接或其他方式连接。
本专利的网络可以是指公共陆地移动网络(英文全称可以为：Public Land Mobile Network，，英文简称可以为：PLMN)网络或者D2D网络或者M2M网络或者其他网络，图1只是举例的简化示意图，网络中还可以包括其他网络设备，图1中未予以画出。
本专利申请中的终端设备也可以指用户设备(英文全称可以为：User Equipment，英文简称可以为：UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(英文全称可以为：Session Initiation Protocol，英文简称可以为：SIP)电话、无线本地环路(英文全称可以为：Wireless Local Loop，英文简称可以为：WLL)站、个人数字处理(英文全称可以为：Personal Digital Assistant，英文简称可以为：PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的PLMN网络中的终端设备等。
本专利申请中的网络设备可以是用于与终端设备通信的设备，网络设备可以是GSM或码分多址(英文全称可以为：Code Division Multiple Access，英文简称可以为CDMA)中的BTS(英文全称可以为：Base Transceiver Station)，也可以是WCDMA中的NB(英文全称可以为：NodeB)，也可以是云无线接入网络(英文全称可以为：Cloud Radio Access Network，英文简称可以为CRAN)场景下的无线控制器，还可以是LTE中的eNB或eNodeB(英文全称可以为：Evolutional Node B)或接入点，或者车载设备、可穿戴设备，未来5G网络中的网络侧设备或者未来演进的PLMN网络中的网络设备。
为了解决未来网络大量的MTC类业务，以及满足低时延、高可靠的业务传输，本专利提出了免授权传输的一种方案。免授权传输英文可以表示为Grant Free。这里的免授权传输可以针对的是上行数据传输。免授权传输可以理解为如下含义的任一一种含义，或，多种含义，或者多种含义中的部分 技术特征的组合：
免授权传输可以指：网络设备预先分配并告知终端设备多个传输资源；终端设备有上行数据传输需求时，从网络设备预先分配的多个传输资源中选择至少一个传输资源，使用所选择的传输资源发送上行数据；网络设备在所述预先分配的多个传输资源中的一个或多个传输资源上检测终端设备发送的上行数据。所述检测可以是盲检测，也可能根据所述上行数据中某一个控制域进行检测，或者是其他方式进行检测。
免授权传输可以指：网络设备预先分配并告知终端设备多个传输资源，以使终端设备有上行数据传输需求时，从网络设备预先分配的多个传输资源中选择至少一个传输资源，使用所选择的传输资源发送上行数据。
免授权传输可以指：获取预先分配的多个传输资源的信息，在有上行数据传输需求时，从所述多个传输资源中选择至少一个传输资源，使用所选择的传输资源发送上行数据。获取的方式可以从网络设备获取。
免授权传输可以指：不需要网络设备动态调度即可实现终端设备的上行数据传输的方法，所述动态调度可以是指网络设备为终端设备的每次上行数据传输通过信令来指示传输资源的一种调度方式。可选地，实现终端设备的上行数据传输可以理解为允许两个或两个以上终端设备的数据在相同的时频资源上进行上行数据传输。可选地，所述传输资源可以是UE接收所述的信令的时刻以后的一个或多个传输时间单位的传输资源。一个传输时间单位可以是指一次传输的最小时间单元,比如TTI(Transmission Time Interval),数值可以为1ms,或者可以是预先设定的传输时间单元。
免授权传输可以指：终端设备在不需要网络设备授权的情况下进行上行数据传输。所述授权可以指终端设备发送上行调度请求给网络设备，网络设备接收调度请求后，向终端设备发送上行授权，其中所述上行授权指示分配给终端设备的上行传输资源。
6、免授权传输可以指：一种竞争传输方式，具体地可以指多个终端在预先分配的相同的时频资源上同时进行上行数据传输，而无需基站进行授权。
所述的数据可以为包括业务数据或者信令数据。
所述盲检测可以理解为在不预知是否有数据到达的情况下，对可能到达的数据进行的检测。所述盲检测也可以理解为没有显式的信令指示下的检 测。
所述传输资源可以包括但不限于如下资源的一种或多种的组合：时域资源，如无线帧、子帧、符号等；频域资源，如子载波、资源块等；空域资源，如发送天线、波束等；码域资源，如稀疏码多址接入(英文全称为：Sparse Code Multiple Access，英文简称为：SCMA)码本组、低密度签名(英文全称为：Low Density Signature，英文简称为：LDS)组、CDMA码组等；上行导频资源。
如上的传输资源可以根据包括但不限于如下的控制机制进行的传输：上行功率控制，如上行发送功率上限控制等；调制编码方式设置，如传输块大小、码率、调制阶数设置等；重传机制，如HARQ机制等。
竞争传输单元(英文全称可以为：Contention Transmission Unit，英文缩写可以为：CTU)可以为免授权传输的基本传输资源。CTU可以指时间、频率、码域相结合的传输资源，或者，可以指时间、频率、导频相结合的传输，或者，可以指时间、频率、码域、导频相结合的传输资源。
CTU的接入区域可以指用于免授权传输的时频区域。
专利号PCT/CN2014/073084，申请名称为“System and Method for Uplink Grant-free Transmission Scheme”的专利申请给出了一种上行免授权传输的技术方案。PCT/CN2014/073084申请介绍可以将无线资源划分为各种CTU，UE被映射到某个CTU。每个CTU可以被分配一组码，所分配的一组码可以是一组CDMA码，也可以是SCMA码本集或LDS组或签名(signature)组等。每一个码可以对应一组导频。用户可以选择一个码以及与该码对应的导频组中的一个导频进行上行传输。PCT/CN2014/073084申请内容也可以理解为通过引用作为本发明实施例内容的一部分，不再赘述。
图2是根据本发明的一个实施例的CTU资源定义的示意图。
图2示出了四个竞争接入区域(也称为CTU接入区域)210、220、230和240，而可用带宽被分成四个竞争接入区域的时频区域。每个竞争接入区域可以占用预定数量的资源块(Resource Block)，例如，在图2的实施例中，竞争接入区210包括四个RB：RB1、RB2、RB3和RB4。本发明的实施例并不限于此，例如，不同的竞争接入区域可以包括不同数目的RB。在图2中，每个竞争接入区域能够支持36个UE竞争该竞争区域中定义的36个CTU，每个CTU是时间、频率、码资源和导频的结合。码资源包括码分多 址接入(Code Division Multiple Access，CD)码，或稀疏码分多址(Sparse Code Multiple Access，SCMA)码或低密度签名(Low Density Signature，LDS)或其它签名(signature)等。每个竞争接入区域占用一个时频资源区，每个时频资源区支持六个签名(S1-S6)，并且每个签名映射到6个导频，从而生成总共36个导频(P1-P36)。基站可以使用导频/签名解相关器来检测或解码各个UE在CTU上发送的信号。
应理解，为了描述方便，图2示出了四个竞争接入区域，本发明的实施例并不限于此，可以根据需要定义更多或更少的竞争接入区域。
图3是根据本发明的一个实施例的免授权传输的切换方法的示意性流程图。图3的方法由图1的网络设备(例如，基站)执行。
310，第一网络设备向第二网络设备发送切换请求消息，其中切换请求消息用于请求将终端设备从第一网络设备切换至第二网络设备进行免授权传输；
320，第一网络设备接收第二网络设备发送的切换请求确认消息，其中切换请求确认消息用于确认将终端设备从第一网络设备切换至第二网络设备进行免授权传输；
330，第一网络设备向终端设备发送切换指示消息，其中切换指示消息用于指示终端设备采用免授权传输方式在CTU资源上向第二网络设备传输信号。
具体而言，第一网络设备为源网络设备，第二网络设备为目标网络设备。在切换前，终端设备采用免授权传输方式与第一网络设备通信，在切换后，终端设备采用免授权方式与第二网络设备通信。当切换条件满足(例如，终端设备与第二网络设备之间的信道质量优于终端设备与第一网络设备之间的信道质量，或者终端设备从第一网络设备的覆盖区域进入第二网络设备的覆盖区域)时，第一网络设备通过切换请求消息向第二网络设备发起切换。第二网络设备接收到切换请求消息之后，在确定允许终端设备采用免授权传输方式接入第二网络设备时，向第一网络设备发送切换请求确认消息。第一网络设备在根据切换请求消息确定第二网络设备允许切换时，向终端设备发送切换请求指示消息。终端设备根据切换请求指示消息采用免授权传输方式在CTU资源上向第二网络设备传输信号。
上述CTU资源可以指用于免授权传输的竞争接入区域，还可以指竞争 接区域所包括的CTU。根据本发明的实施例并不限于此，CTU资源也可以是CTU所包括的时频资源、码资源和导频中的至少一个。例如，时域资源可以指无线帧、子帧、符号等；频域资源可以指子载波、资源块等；码域资源可以指稀疏码多址接入(Sparse Code Multiple Access，简称为“SCMA”)码本、低密度签名(Low Density Signature，简称为“LDS”)、CDMA码等。
根据本发明的实施例，第一网络设备向第二网络设备请求将终端设备从第一网络设备切换至第二网络设备进行免授权传输，并在第二网络设备允许切换之后，指示终端设备采用免授权传输方式在CTU上向第二网络设备传输信号，从而实现了将终端设备从一个网络设备切换至另一网络设备进行免授权传输。
根据本发明的实施例，切换请求确认消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
具体而言，在切换请求确认消息和切换指示消息中携带第二网络设备允许终端设备进行免授权传输时使用的CTU资源的信息，以便终端设备根据CTU资源的信息确定CTU以进行免授权传输。由于第二网络设备能够预先知道终端设备接入第二网络设备所使用的CTU资源，从而能够快速地根据该CTU资源解调出免授权传输的信号，缩小了盲检测的范围，从而减少了盲检测的次数，并降低了切换过程的信令开销。
根据本发明的实施例，切换请求消息可以包含终端设备在切换前进行免授权传输所采用的第一CTU资源的信息，切换请求确认消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二CTU资源的信息。
根据本发明的实施例，在第二网络设备允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。换句话说，在第二网络设备允许终端设备采用原来的CTU资源接入第二网络设备的情况下，第二网络设备在切换请求确认消息中携带原来的CTU资源的信息，在第二网络设备不允许终端设备采用原来的CTU资源接入第二网络设备的情况下，第二网络设备在切换请求消息中携带新的CTU资源的信息。另外，如果第二网络设备 不允许终端设备接入第二网络设备，则可以在切换请求消息中携带拒绝终端设备接入的指示信息。
可替代地，作为另一实施例，在第二网络设备不允许终端设备采用原来的CTU资源接入第二网络设备的情况下，第二网络设备可以在切换请求确认消息中携带允许终端设备使用的新的CTU资源的信息，然后由第一网络设备在切换指示消息中携带该新的CTU的信息，以便终端设备在CTU上传输信号。
根据本发明的实施例，第一CTU资源包括第一CTU，第二CTU资源包括第二CTU。
例如，第一网络设备可以在切换请求确认消息中携带原来的CTU的信息，如果第二网络设备允许终端设备采用原来的CTU接入第二网络设备，则在切换请求确认消息中携带原来的CTU的信息，如果第二网络设备不允许终端设备采用原来的CTU资源接入第二网络设备，则在切换请求消息中携带新的CTU的信息。
根据本发明的实施例，如果第二网络设备允许UE在切换过程仍然采用原来的CTU，则能够实现软切换。
根据本发明的实施例，第一CTU资源包括第一码资源，第二CTU资源包括第二码资源。
例如，如果第二网络设备允许终端设备使用原来的码资源接入第二网络设备，则在切换请求确认消息中携带原来的码资源的信息，如果第二网络设备不允许终端设备采用原来的码资源接入第二网络设备，则在切换请求消息中携带新的码资源的信息。
根据本发明的实施例，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
以第二CTU资源为竞争接入区域为例，第一网络设备在切换请求消息中指示终端设备支持免授权传输，第二网络设备在接收到切换请求消息后，根据第二网络设备的负载情况或第二网络设备的竞争接入区域的负载情况，确定允许第二网络设备在哪个竞争接入区域(例如，负载较轻的竞争接入区 域)接入第二网络设备，并且在切换确定消息中包含所确定的竞争接入区域，而后由第一网络设备在切换指示消息中向终端设备指示该竞争接入区域。终端设备从切换指示消息中指示的竞争接入区域的多个CTU中选择至少一个CTU进行免授权传输。
根据本发明的实施例，终端设备可以根据第二网络设备指示的竞争接入区域，灵活地选择CTU，而且由于第二网络设备可以根据自身的负载情况选择负载较轻的竞争接入区域供终端设备接入或者根据整体的负载情况确定是否允许终端设备接入，使得第二网络设备可实现负载均衡，另外，由于终端设备可以根据第二网络设备允许的竞争接入区域选择合适的CTU，从而降低了免授权传输终端设备之间冲突的概率。
可替代地，作为另一实施例，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：第二网络设备允许终端设备使用的CTU的信息，切换指示消息包含第二网络设备允许终端设备使用的CTU的信息，以便终端设备采用免授权方式在该CTU传输信号。
换句话说，第一网络设备仅仅通知第二网络设备终端设备支持免授权传输，而由第二网络设备为终端设备提供接入第二网络设备的CTU。
根据本发明的实施例，上述CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
可选地，作为另一实施例，第一网络设备向第二网络设备发送切换请求消息之前，还包括：第一网络设备根据终端设备的测量报告信息和第一网络设备的负载信息中的至少一个，确定需要将终端设备切换到第二网络设备。
例如，当第一网络设备根据测量报告中的信道质量信息确定第二网络设备与终端设备之间的信道质量好于第一网络设备与终端设备之间的信道质量时，确定将终端设备切换到第二网络设备。例如，当第一网络设备确定用户设备从第一网络设备的覆盖区域进入第二网络设备的覆盖区域时，确定将终端设备切换到第二网络设备。再如，当第一网络设备的负载过重时，确定将终端设备切换到第二网络设备。
应理解，本发明的实施例并不限于上述切换判决的方法，例如，也可以由终端设备监测通信端口的信号强度和质量，当满足切换条件时，选择一个最好的候选网络设备作为第二网络设备并向第一网络设备发起切换请求。第一网络设备可以在接收到终端设备的请求时确定将终端设备切换至第二网 络设备。再例如，核心网可以要求所辖范围内的网络设备上报通信链路的信号强度和质量，并基于这些上报的通信链路的信号强度和质量进行切换。第二网络设备在接收到核心网的指示后，确定将终端设备切换至第二网络设备。
图4是根据本发明的另一实施例的免授权传输的切换方法的示意性流程图。图4的方法由图1中的网络设备(例如，基站)执行。图4的方法与图3的方法对应，在此适当省略详细的描述。
410，第二网络设备接收第一网络设备发送的切换请求消息，其中切换请求消息用于请求将终端设备从第一网络设备切换至第二网络设备进行免授权传输；
420，第二网络设备确定将终端设备从第一网络设备切换至第二网络设备进行免授权传输；
430，第二网络设备向第一网络设备发送切换请求确认消息，其中切换请求确认消息用于确认将终端设备从第一网络设备切换至第二网络设备进行免授权传输；
440，第二网络设备盲检测终端设备采用免授权传输方式在CTU资源上传输的信号。
根据本发明的实施例，第二网络设备接收第一网络设备发送的切换请求，并在确定允许切换之后，通过第一网络设备指示终端设备采用免授权传输方式在CTU上向第二网络设备传输信号，从而实现了将终端设备从一个网络设备切换至另一网络设备进行免授权传输。
根据本发明的实施例，切换请求确认消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
根据本发明的实施例，切换请求消息包含终端设备在切换前进行免授权传输所使用的第一CTU资源的信息，其中，在440中，第二网络设备基于第二CTU资源盲检测终端设备采用免授权传输方式在第二CTU资源上传输的信号。
根据本发明的实施例，在第二网络设备允许终端设备使用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备使用第一CTU资源进行免授权传输的情况 下，第二CTU资源与第一CTU资源不同。
根据本发明的实施例，第一CTU资源包括第一CTU，第二CTU资源包括第二CTU。
在420中，第二网络设备根据第二网络设备的竞争接入区域的负载情况、第二网络设备的负载情况以及第一CTU资源中的至少一个，确定将终端设备切换到第二网络设备。
例如，第二网络设备在接收到切换请求消息后，第二网络设备可以优先确定终端设备切换前使用的CTU资源是否可以用来接入第二网络设备，如果该CTU资源所在的竞争接入区域的负载过重，则为终端设备选择新的负载较轻的竞争接入区域上的CTU资源。如果第二网络设备的负载过重，也可以拒绝终端设备接入第二网络设备。
根据本发明的实施例，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二网络设备允许终端设备使用的第二CTU资源的信息。
在420中，第二网络设备根据第二网络设备的竞争接入区域的负载情况和第二网络设备的负载情况中的至少一个，确定将终端设备切换到第二网络设备。
例如，第二网络设备在接收到切换请求消息后，根据第二网络设备的负载情况或第二网络设备的竞争接入区域的负载情况，确定允许第二网络设备在哪个竞争接入区域(例如，负载较轻的竞争接入区域)接入第二网络设备，并且在切换确定消息中包含所确定的竞争接入区域，而后由第一网络设备在切换指示消息中向终端设备指示该竞争接入区域。如果第二网络设备的负载过重，也可以拒绝终端设备接入第二网络设备。
根据本发明的实施例，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
图5是根据本发明的又一实施例的免授权传输的方法的示意性流程图。图5的方法由图1的网络设备来执行。图5的方法由图1中的网络设备(例如，基站)执行。图5的方法与图3的方法对应，在此适当省略详细的描述。
510，终端设备接收第一网络设备发送的切换指示消息，其中切换指示消息用于指示终端设备从第一网络设备切换至第二网络设备进行免授权传 输；
520，终端设备根据切换指示消息，采用免授权传输方式在CTU资源上向第二网络设备传输信号。
根据本发明的实施例，与第一网络设备进行免授权传输的终端设备在接收到第一网络设备发送的切换指示之后，采用免授权传输方式在CTU上向第二网络设备传输信号，从而实现了将终端设备从一个网络设备切换至另一网络设备进行免授权传输。
根据本发明的实施例，终端设备在切换前采用第一CTU资源进行免授权传输，切换指示消息包含第二网络设备允许终端设备采用的第二CTU资源的信息，以便终端设备采用免授传输方式在第二CTUCTU资源上传输信号。
根据本发明的实施例，在第二网络设备允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
根据本发明的实施例，在520中，终端设备根据切换指示消息中携带的第二CTU资源的信息，确定终端设备切换至第二网络设备进行免授权传输时所使用的CTU；终端设备采用免授权传输方式在CTU上传输信号。
根据本发明的实施例，第二CTU资源为竞争接入区域，终端设备在确定终端设备切换至第二网络设备进行免授权传输时所使用的CTU时，可以根据切换指示消息中携带的竞争接入区域的信息，确定竞争接入区域中的CTU的数目，并且根据下列公式确定CTU：
IndxCTU＝Sigi modNCTU
其中IndxCTU为CTU的索引号，mod表示取模，NCTU表示竞争接入区域中的CTU的数目，Sigi表示终端设备的码资源的索引。
根据本发明的实施例，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
下面结合具体例子，更加详细地描述本发明的实施例。在本实施例中，网络设备以基站为例进行说明。
根据本发明的实施例，在免授权传输场景下，当UE进入基站的覆盖区时，可以接收到基站发送的高层信令。该高层信令可以携带CTU接入区域 定义(CTU access region definition)、CTU的总数、默认映射规则等等。可替代地，默认映射规则也可以在UE上预先配置。UE可以从CTU接入区域的多个CTU中确定一个合适的CTU以在该CTU上进行免授权传输。当不同的UE在相同的CTU进行免授权传输时，即竞争相同的CTU时，会出现冲突(collision)。UE可以根据基站的指示确定是否存在冲突。例如，可以采用异步混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)方法解决冲突引起的问题。如果冲突的次数超过预定的阈值，则可以请求基站重新映射CTU。基站将重新映射后的CTU的信息发送给UE，以便UE在重新映射后的CTU上进行免授权传输。然而，在某些场景下，例如，UE当前接入的基站(源基站)的负载过重时或者信道质量较差时，或者UE从一个基站的覆盖区域进入另一个基站的覆盖区域时，需要将UE从源基站切换至另一基站(目标基站)进行免授权传输。
下面结合图6和图7的实施例详细描述基于免授权传输的切换过程。
图6是根据本发明的另一实施例的基于免授权传输的切换过程的示意性流程图。图6的过程是图3、图4和图5的方法的例子。在此适当省略详细的描述。
610，源基站执行切换判决，以确定是否将UE切换至目标基站。
源基站根据UE上报的测量报告(Measurement Report)信息(例如，信道质量信息)和/或者根据源基站的负载信息(例如，源基站的负载过重)，确定将UE切换到目标基站。
具体而言，源基站可以给UE下发不同种类的测量任务，例如，可以利用时分同步码分多址(Time Division-Synchronous Code Division Multiple Access，TD-SCDMA)场景下的测量控制(Measurement Control)消息下发测量配置，或者利用LTE场景下的RRC连接重配置消息下发测量配置。UE接收到测量配置后，进行测量，并且在测量结果满足上报条件后向源基站发送相应的测量报告。源基站根据终端上报的测量报告决定是否执行切换。例如，当源基站根据测量报告中的信道质量信息确定目标基站与UE之间的信道质量好于源基站与UE之间的信道质量时，确定将UE切换到目标基站。本发明的实施例并不限于此，还可以根据测量报告中的其它信息进行切换判决。再如，当第一基站的负载过重时，确定将UE切换到目标基站。
620，源基站向目标基站发送切换请求(Handover Request)消息，用于 请求将UE切换至目标基站。切换请求消息携带CTU和/或码资源的信息。
例如，如果源基站确定将UE切换至目标基站，则源基站可以在切换请求消息中携带UE进行免授权传输所选择的CTU和/或码资源。CTU为免授权传输的基本资源，包括但不限于时间资源、频率资源、码资源和导频的组合。UE在免授权传输时会映射到某一CTU上进行免授权传输。UE所采用的码资源，是指网络侧为UE进行免授权传输所分配的CDMA码、SCMA码或LDS或其它签名等。
源基站可以通过切换请求消息显式地指示UE是否采用或支持免授权模式传输。例如，在源基站确定将UE切换至目标基站时，源基站可以向目标基站发送切换请求消息，并且在切换请求消息中指示UE是否正在进行免授权传输，例如，可以用一个信元(Information Element，IE)，免授权传输能力(Capability of Grant Free)，来表示。例如，如果免授权传输能力的值为1，则表示UE采用免授权传输。本发明的实施例并不限于此，也可以是当免授权传输能力的值为0时，则表示UE采用免授权传输，或者免授权传输能力所在信元位置有值时表示UE采用免授权传输。
可替代地，源基站也可以通过切换请求消息是否携带有UE进行免授权传输所选择的CTU和/或UE所采用的码资源来确定UE是否采用免授权模式传输。
例如，如表1所示，列出了从源基站到目标基站的切换请求消息中可以增加如下信息元素(IE：Information Element)。
表1
Figure PCTCN2015082036-appb-000001
630，目标基站收到源基站的切换请求消息后，进行接入控制。
目标基站接收到源基站的切换请求消息后，根据目标基站的负载情况， 例如，竞争接入区域(Contention Access Region，CAR)的负载情况和/或目标基站整体的负载情况以及UE原来使用的CTU和/或码资源，判断UE是否可接入目标基站以及是否能够使用特定竞争接入区域。UE在免授权传输时会映射到特定竞争接入区域的特定CTU上进行免授权传输。
例如，目标基站可以根据目标基站的整体负载情况，确定UE是否可以接入目标基站。如果目标基站的整体负载过重(例如，超过预定的阈值)，则不允许UE接入目标基站，否则允许该UE接入目标基站。在免授权传输模式下，每个目标基站的资源可以分为多个竞争接入区域，每个竞争接入区域可以包含一个或多个CTU。CTU为免授权传输的基本资源，包括但不限于时间资源、频率资源、码资源和导频的组合。进一步，如果目标基站上与UE原来采用的CTU对应的竞争接入区域的负载较重，则选择新的负载较轻的竞争接入区域上的CTU和/或码资源，否则使用原来的CTU和/或码资源。
640，目标基站向源基站发送切换请求确认(Handover Request Acknowledge)消息，用于确认将UE从源基站切换至目标基站进行免授权传输。切换请求消息携带CTU和/或码资源的信息。
如果目标基站允许该UE采用原CTU和/或码资源接入目标基站，则在640的切换请求确认消息中指示UE采用原CTU和/或码资源进行免授权传输。
如果目标基站不允许该UE采用原CTU和/或码资源接入目标基站，则在640切换请求确认消息中给UE指示新的CTU和/或码资源。
例如，如表2所示，列出了从目标基站到源基站的切换请求确认消息中增加如下信息元素。
表2
Figure PCTCN2015082036-appb-000002
650，源基站向UE发送切换指示消息，用于指示UE切换至目标基站， 即指示UE采用免授权传输方式在CTU上向目标基站传输信号。切换指示消息携带CTU和/或码资源的信息。
源基站可以将UE执行切换所需的参数携带在切换指示消息中，例如，包括目标基站的ID、目标功率、CTU和/或码资源等无线资源和物理资源配置。
应理解，上述切换指示消息可以通过改进或扩展现有的信令来实现，例如，该切换指示消息可以是RRC连接重配置(RRC CONNECTION RECONFIGURATION)消息，与常规RRC连接重配置消息不同的是，该切换指示消息中可以携带目标基站允许UE接入的CTU的信息而非频点信息。本发明的实施例的实施例并不限于此，例如，基站可以通过专用的高层信令来指示UE切换至目标基站。
660，UE在CTU上与目标基站进行免授权传输。
UE可以根据切换指示消息确定目标基站允许的CTU，中断与源基站的连接，并映射到目标基站允许的CTU上进行免授权传输。具体的免授权传输的描述详见图2的实施例，在此不再赘述。
本实施例的优点在于，由于目标基站根据源基站发送的切换请求消息，已知UE所采用的CTU和/或码资源，目标基站可以快速地根据该CTU和/或码资源信息解调出UE免授权传输的数据，缩小了盲检测的范围，从而减少了盲检测的次数，并降低了切换过程的信令开销。另外，如果UE在切换过程仍然采用原来的CTU和/或码资源，则能够实现软切换。
图7是根据本发明的另一实施例的基于免授权传输的切换过程的示意性流程图。图7的过程是图3、图4和图5的方法的例子。在此适当省略详细的描述。
710，源基站确定将UE切换至目标基站。
源基站根据UE上报的测量报告(Measurement Report)信息(例如，信道质量信息)和/或者根据源基站的负载信息(例如，源基站的负载过重)，确定将UE切换到目标基站。710与610类似，在此不再赘述。
720，源基站向目标基站发送切换请求(Handover Request)消息，用于请求将UE切换至目标基站。切换请求消息携带免授权传输能力的信息。
例如，在源基站确定将UE切换至目标基站时，源基站可以向目标基站发送切换请求消息，并且在切换请求消息中指示UE采用免授权模式传输， 例如，可以用一个信元(Information Element，IE)，免授权传输能力(Capability of Grant Free)，来表示。如果免授权传输能力的值为1，则表示UE采用免授权传输。本发明的实施例并不限于此，也可以是当免授权传输能力的值为0时，则表示UE采用免授权传输，或者免授权传输能力所在信元位置有值时表示UE采用免授权传输。
例如，如表3所示，列出了从源基站到目标基站的切换请求消息中可以增加如下信息元素(IE：Information Element)。
表3
Figure PCTCN2015082036-appb-000003
730，目标基站收到源基站的切换请求消息后，进行接入控制。
如果目标基站根据切换请求消息确定UE采用免授权模式传输，则目标基站根据目标基站的负载情况，例如，竞争接入区域(Contention Access Region，CAR)的负载情况或/和目标基站整体的负载情况，判断UE是否可接入目标基站以及是否能够使用特定竞争接入区域。
在免授权传输模式下，每个目标基站的资源可以分为多个竞争接入区域，每个竞争接入区域可以包含一个或多个CTU。CTU为免授权传输的基本资源，包括但不限于时间资源、频率资源、码资源和导频的组合。UE在免授权传输时会映射到特定竞争接入区域的特定CTU上进行免授权传输。
例如，目标基站可以根据目标基站的整体负载情况，确定UE是否可以接入目标基站。如果目标基站的整体负载过重(例如，超过预定的阈值)，则不允许UE接入目标基站，否则允许UE接入目标基站。目标基站在确定允许UE接入后，还可以进一步根据目标基站的竞争接入区域的负载，以确定允许UE使用哪个竞争接入区域的CTU。例如，如果某个竞争接入区域的负载低于预定的阈值，则目标基站允许UE使用该竞争接入区域的CTU。如果目标基站根据竞争接入区域的负载情况或/和目标基站的整体负载情况确 定UE可以接入目标基站，则可以选择负载较轻的竞争接入区域，并在740中指示UE在该竞争接入区域接入目标基站。
740，目标基站向源基站发送切换请求确认(Handover Request Acknowledge)消息，用于确认将UE从源基站切换至目标基站进行免授权传输，即通知源基站目标基站中已经准备好用于免授权传输的资源。切换请求确认携带竞争接入区域的信息。
如果目标基站允许UE接入目标基站，则向源基站发送切换请求确认消息，并在切换请求确认消息中指示UE可接入的竞争接入区域。例如，目标基站可以在切换请求确认消息中携带竞争接入区域的信息(例如，标识或索引)，但本发明的实施例并不限于此，例如，也可以采用通信双方约定好的方式隐式地通知源基站。
如果目标基站不允许UE接入目标基站，目标基站可以在切换请求确认消息中携带拒绝UE接入目标基站的信息。这样，源基站在接收到切换请求确认消息后，则认为目标基站不允许UE接入目标基站，从而终止此次切换过程。
可替代地，如果目标基站不允许UE接入目标基站，则目标基站可以不向源基站切换请求做出任何响应，这样，源基站在预定时间期满后仍为接收到切换请求确认消息，则认为目标基站不允许UE接入目标基站，从而终止此次切换过程。
例如，如表4所示，列出了从目标基站到源基站的切换请求确认消息中增加如下信息元素(IE：Information Element)。
表4
Figure PCTCN2015082036-appb-000004
750，源基站向UE发送切换指示消息，用于指示UE切换至目标基站，即指示UE采用免授权传输方式在CTU上向目标基站传输信号。切换指示消息携带竞争接入区域的信息。
源基站可以将UE执行切换所需的参数携带在切换指示消息中，例如，包括目标基站的ID、目标功率、竞争接入区域等无线资源和物理资源配置。
应理解，上述切换指示消息可以通过改进或扩展现有的信令来实现，例如，该切换指示消息可以是RRC连接重配置(RRC CONNECTION RECONFIGURATION)消息，与常规RRC连接重配置消息不同的是，该切换指示消息中可以携带可接入的竞争接入区域(Contention Access Region，CAR)的信息而非频点信息。通过改进或扩展RRC连接重配置消息，可以节省信令开销。本发明的实施例的实施例并不限于此，例如，基站可以通过专用的高层信令来指示UE切换至目标基站。
755，UE确定进行免授权传输的CTU。
例如，UE接收到切换指示消息后，根据切换指示消息确定目标基站允许UE接入目标基站，并且根据切换指示消息中携带的竞争接入区域确定进行免授权传输所使用的CTU。
下面举例说明确定用于免授权传输的CTU的方法。可以根据默认映射规则确定CTU。例如，UE可根据CTU索引号IndxCTU确定用于免授权传输的CTU。UE可以按照下列公式确定CTU的索引号IndxCTU：
IndxCTU＝Sigi modNCTU
其中“mod”表示取模操作，NCTU为该竞争接入区域中的CTU的数目，Sigi为UE用于免授权传输的码资源或签名序列的索引。例如，Sigi具体可以为分配UE的专用连接签名(dedicated connection signature，DCS)的索引。
应理解，也可以采用其它方法确定用于免授权传输的CTU，例如，可以从可用的CTU中随机选择合适的CTU。
760，UE在CTU上与目标基站进行免授权传输。
UE在选择CTU之后，可以中断与源基站的连接，并映射到选择的CTU上进行免授权传输。具体的免授权传输的描述详见图2的实施例，在此不再赘述。
本实施例的优点在于，UE可以根据目标基站指示的竞争接入区域，灵活地选择CTU，而且由于目标基站可以根据自身的负载情况选择负载较轻的竞争接入区域供UE接入或者根据整体的负载情况确定是否允许UE接入，使得目标基站可实现负载均衡，另外，由于UE可以根据目标基站允许的竞争接入区域选择合适的CTU，从而降低了免授权传输UE之间冲突的概率。
上面描述了根据本发明实施例的协作译码的方法，下面分别结合图8至图13描述根据本发明实施例的用户设备、接入网设备和核心网设备。
图8是根据本发明的一个实施例的网络设备800的示意性结构图。网络设备800包括：发送模块810和接收模块820。
发送模块810，用于向第二网络设备发送切换请求消息，其中切换请求消息用于请求将终端设备从网络设备切换至第二网络设备进行免授权传输。接收模块820，用于接收第二网络设备发送的切换请求确认消息，其中切换请求确认消息用于确认将终端设备从网络设备切换至第二网络设备进行免授权传输，其中发送模块810还用于向终端设备发送切换指示消息，其中切换指示消息用于指示终端设备采用免授权传输方式在竞争传输单元CTU资源上向第二网络设备传输信号。
根据本发明的实施例，第一网络设备向第二网络设备请求将终端设备从第一网络设备切换至第二网络设备进行免授权传输，并在第二网络设备允许切换之后，指示终端设备采用免授权传输方式在CTU上向第二网络设备传输信号，从而实现了将终端设备从一个网络设备切换至另一网络设备进行免授权传输。
根据本发明的实施例，切换请求确认消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
根据本发明的实施例，切换请求消息包含终端设备在切换前进行免授权传输所采用的第一CTU资源的信息。
根据本发明的实施例，在第二网络设备允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
根据本发明的实施例，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
根据本发明的实施例，CTU资源的信息包括时频资源、码资源和导频中 的至少一个的信息、CTU的信息或者竞争接入区域的信息。
可选地作为另一实施例，还包括：确定模块830，用于在网络设备向第二网络设备发送切换请求消息之前，根据终端设备的测量报告信息和网络设备的负载信息中的至少一个，确定需要将终端设备切换到第二网络设备。
网络设备800的模块的操作和功能可以参考上述图3的方法，为了避免重复，在此不再赘述。
图9是根据本发明的另一实施例的网络设备900的示意性结构图。网络设备900包括：接收模块910、确定模块920、发送模块930和检测模块940。
接收模块910，用于接收第一网络设备发送的切换请求消息，其中切换请求消息用于请求将终端设备从第一网络设备切换至网络设备进行免授权传输。
确定模块920，用于确定将终端设备从第一网络设备切换至网络设备进行免授权传输。
发送模块930，用于向第一网络设备发送切换请求确认消息，其中切换请求确认消息用于确认将终端设备从第一网络设备切换至网络设备进行免授权传输。
检测模块940，用于盲检测终端设备采用免授权传输方式在CTU资源上传输的信号。
根据本发明的实施例，第二网络设备接收第一网络设备发送的切换请求，并在确定允许切换之后，通过第一网络设备指示终端设备采用免授权传输方式在CTU上向第二网络设备传输信号，从而实现了将终端设备从一个网络设备切换至另一网络设备进行免授权传输。
根据本发明的实施例，切换请求确认消息包含网络设备允许终端设备使用的第二竞争接入区域或CTU资源的信息，切换指示消息包含第二竞争接入区域或CTU资源的信息，以便终端设备采用免授权传输方式使用在竞争接入区域或第二CTU资源的信息上进行免授权传输信号。
根据本发明的实施例，切换请求消息包含终端设备在切换前进行免授权传输所使用的第一CTU资源的信息，其中检测模块940基于第二CTU资源盲检测终端设备采用免授权传输方式在第二CTU资源上传输的信号。
根据本发明的实施例，在网络设备允许终端设备使用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在网 络设备不允许终端设备使用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
根据本发明的实施例，确定模块920根据网络设备的竞争接入区域的负载情况、网络设备的负载情况以及第一CTU资源中的至少一个，确定将终端设备切换到网络设备。
根据本发明的实施例，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含网络设备允许终端设备使用的第二CTU资源的信息。
根据本发明的实施例，确定模块920根据网络设备的竞争接入区域的负载情况和网络设备的负载情况中的至少一个，确定将终端设备切换到网络设备。
根据本发明的实施例，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
网络设备900的模块的操作和功能可以参考上述图4的方法，为了避免重复，在此不再赘述。
图10是根据本发明的另一实施例的终端设备1000的示意性结构图。终端设备1000包括接收模块1010和发送模块1020。
接收模块1010，用于接收第一网络设备发送的切换指示消息，其中切换指示消息用于指示终端设备从第一网络设备切换至第二网络设备进行免授权传输。发送模块1020，用于根据切换指示消息，采用免授权传输方式在竞争传输单元CTU资源上向第二网络设备传输信号。
根据本发明的实施例，与第一网络设备进行免授权传输的终端设备在接收到第一网络设备发送的切换指示之后，采用免授权传输方式在CTU上向第二网络设备传输信号，从而实现了将终端设备从一个网络设备切换至另一网络设备进行免授权传输。
根据本发明的实施例，终端设备在切换前采用第一CTU资源进行免授权传输，切换指示消息包含第二网络设备允许终端设备采用的第二CTU资源的信息，以便终端设备采用免授传输方式在第二竞争传输单元CTU资源上传输信号。
根据本发明的实施例，在第二网络设备允许终端设备采用第一CTU资 源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
可选地，作为另一实施例，终端设备1000还包括：确定模块1030，用于根据切换指示消息中携带的第二CTU资源的信息，确定终端设备切换至第二网络设备进行免授权传输时所使用的CTU，其中发送模块1020采用免授权传输方式在CTU上传输信号。
根据本发明的实施例，第二CTU资源为竞争接入区域，确定模块1030根据切换指示消息中携带的竞争接入区域的信息，确定竞争接入区域中的CTU的数目；
终端设备根据下列公式确定CTU：
IndxCTU＝Sigi modNCTU
其中IndxCTU为CTU的索引号，mod表示取模，NCTU表示竞争接入区域中的CTU的数目，Sigi表示终端设备的码资源的索引。
根据本发明的实施例，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
终端设备1000的模块的操作和功能可以参考上述图5的方法，为了避免重复，在此不再赘述。
图11是根据本发明的一个实施例的网络设备1100的示意性结构图。网络设备1100包括：处理器1110、收发器1120、存储器1130和总线1140。
收发器1120用于向第二网络设备发送切换请求消息，其中切换请求消息用于请求将终端设备从网络设备切换至第二网络设备进行免授权传输。收发器1120还用于接收第二网络设备发送的切换请求确认消息，其中切换请求确认消息用于确认将终端设备从网络设备切换至第二网络设备进行免授权传输。收发器1120还用于向终端设备发送切换指示消息，其中切换指示消息用于指示终端设备采用免授权传输方式在竞争传输单元CTU资源上向第二网络设备传输信号。
根据本发明的实施例，第一网络设备向第二网络设备请求将终端设备从第一网络设备切换至第二网络设备进行免授权传输，并在第二网络设备允许切换之后，指示终端设备采用免授权传输方式在CTU上向第二网络设备传输信号，从而实现了将终端设备从一个网络设备切换至另一网络设备进行免 授权传输。
根据本发明的实施例，切换请求确认消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
根据本发明的实施例，切换请求消息包含终端设备在切换前进行免授权传输所采用的第一CTU资源的信息。
根据本发明的实施例，在第二网络设备允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
根据本发明的实施例，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：第二网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含第二网络设备允许终端设备使用的第二CTU资源的信息，以便终端设备采用免授权传输方式在第二CTU资源上传输信号。
根据本发明的实施例，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
可选地作为另一实施例，处理器1110用于在网络设备向第二网络设备发送切换请求消息之前，根据终端设备的测量报告信息和网络设备的负载信息中的至少一个，确定需要将终端设备切换到第二网络设备。
网络设备1100的操作和功能可以参考上述图3的方法，为了避免重复，在此不再赘述。
图12是根据本发明的另一实施例的网络设备1200的示意性结构图。网络设备1200包括：处理器1210、收发器1220、存储器1230和总线1240。
收发器1220用于接收第一网络设备发送的切换请求消息，其中切换请求消息用于请求将终端设备从第一网络设备切换至网络设备进行免授权传输。
处理器1210用于调用存储器1230中存储的代码，以确定将终端设备从第一网络设备切换至网络设备进行免授权传输。
收发器1220还用于向第一网络设备发送切换请求确认消息，其中切换请求确认消息用于确认将终端设备从第一网络设备切换至网络设备进行免 授权传输。
处理1210还用于盲检测终端设备采用免授权传输方式在CTU资源上传输的信号。
根据本发明的实施例，第二网络设备接收第一网络设备发送的切换请求，并在确定允许切换之后，通过第一网络设备指示终端设备采用免授权传输方式在CTU上向第二网络设备传输信号，从而实现了将终端设备从一个网络设备切换至另一网络设备进行免授权传输。
根据本发明的实施例，切换请求确认消息包含网络设备允许终端设备使用的第二竞争接入区域或CTU资源的信息，切换指示消息包含第二竞争接入区域或CTU资源的信息，以便终端设备采用免授权传输方式使用在竞争接入区域或第二CTU资源的信息上进行免授权传输信号。
根据本发明的实施例，切换请求消息包含终端设备在切换前进行免授权传输所使用的第一CTU资源的信息，其中处理器1210基于第二CTU资源盲检测终端设备采用免授权传输方式在第二CTU资源上传输的信号。
根据本发明的实施例，在网络设备允许终端设备使用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在网络设备不允许终端设备使用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
根据本发明的实施例，处理器1210根据网络设备的竞争接入区域的负载情况、网络设备的负载情况以及第一CTU资源中的至少一个，确定将终端设备切换到网络设备。
根据本发明的实施例，切换请求消息包含用于指示终端设备支持免授权传输的信息，切换请求确认消息包含：网络设备允许终端设备使用的第二CTU资源的信息，切换指示消息包含网络设备允许终端设备使用的第二CTU资源的信息。
根据本发明的实施例，处理器1210根据网络设备的竞争接入区域的负载情况和网络设备的负载情况中的至少一个，确定将终端设备切换到网络设备。
根据本发明的实施例，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
网络设备1200的操作和功能可以参考上述图4的方法，为了避免重复， 在此不再赘述。
图13是根据本发明的另一实施例的终端设备1300的示意性结构图。终端设备1300包括：处理器1310、收发器1320、存储器1330和总线1340。
收发器1320用于接收第一网络设备发送的切换指示消息，其中切换指示消息用于指示终端设备从第一网络设备切换至第二网络设备进行免授权传输。收发器1320还用于根据切换指示消息，采用免授权传输方式在竞争传输单元CTU资源上向第二网络设备传输信号。
根据本发明的实施例，与第一网络设备进行免授权传输的终端设备在接收到第一网络设备发送的切换指示之后，采用免授权传输方式在CTU上向第二网络设备传输信号，从而实现了将终端设备从一个网络设备切换至另一网络设备进行免授权传输。
根据本发明的实施例，终端设备在切换前采用第一CTU资源进行免授权传输，切换指示消息包含第二网络设备允许终端设备采用的第二CTU资源的信息，以便终端设备采用免授传输方式在第二竞争传输单元CTU资源上传输信号。
根据本发明的实施例，在第二网络设备允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源相同，或者，在第二网络设备不允许终端设备采用第一CTU资源进行免授权传输的情况下，第二CTU资源与第一CTU资源不同。
可选地，作为另一实施例，处理器1310用于根据切换指示消息中携带的第二CTU资源的信息，确定终端设备切换至第二网络设备进行免授权传输时所使用的CTU，其中收发器1320采用免授权传输方式在CTU上传输信号。
根据本发明的实施例，第二CTU资源为竞争接入区域，处理器1310根据切换指示消息中携带的竞争接入区域的信息，确定竞争接入区域中的CTU的数目；
终端设备根据下列公式确定CTU：
IndxCTU＝Sigi modNCTU
其中IndxCTU为CTU的索引号，mod表示取模，NCTU表示竞争接入区域中的CTU的数目，Sigi表示终端设备的码资源的索引。
根据本发明的实施例，CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
终端设备1300的操作和功能可以参考上述图5的方法，为了避免重复，在此不再赘述.
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器， 或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上某一实施例中的技术特征和描述，为了使申请文件简洁清楚，可以理解适用于其他实施例，比如方法实施例的技术特征可以适用于装置实施例或其他方法实施例，在其他实施例不再一一赘述。
以上实施例中的发送模块或发送单元或发射器可以指在空口上进行发送，可以不是空口上发送，而是发送给其他设备以便于其他设备在空口上发送。以上实施例中的接收模块或接收单元或接收器可以指在空口上进行接收，可以不是空口上接收，而是从在空口上接收的其他设备进行接收。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (42)

  1. 一种基于免授权传输的切换方法，其特征在于，包括：
    第一网络设备向第二网络设备发送切换请求消息，其中所述切换请求消息用于请求将终端设备从所述第一网络设备切换至所述第二网络设备进行免授权传输；
    所述第一网络设备接收所述第二网络设备发送的切换请求确认消息，其中所述切换请求确认消息用于确认将所述终端设备从所述第一网络设备切换至所述第二网络设备进行免授权传输；
    所述第一网络设备向所述终端设备发送切换指示消息，其中所述切换指示消息用于指示所述终端设备采用免授权传输方式在竞争传输单元CTU资源上向所述第二网络设备传输信号。
  2. 根据权利要求1所述的切换方法，其特征在于，所述切换请求确认消息包含所述第二网络设备允许所述终端设备使用的第二CTU资源的信息，所述切换指示消息包含所述第二CTU资源的信息，以便所述终端设备采用免授权传输方式在所述第二CTU资源上传输信号。
  3. 根据权利要求2所述的切换方法，其特征在于，所述切换请求消息包含所述终端设备在切换前进行免授权传输所采用的第一CTU资源的信息。
  4. 根据权利要求3所述的切换方法，其特征在于，在所述第二网络设备允许所述终端设备采用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源相同，
    或者，
    在所述第二网络设备不允许所述终端设备采用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源不同。
  5. 根据权利要求2所述的切换方法，其特征在于，所述切换请求消息包含用于指示所述终端设备支持免授权传输的信息，所述切换请求确认消息包含：所述第二网络设备允许所述终端设备使用的第二CTU资源的信息，所述切换指示消息包含所述第二网络设备允许所述终端设备使用的第二CTU资源的信息，以便所述终端设备采用免授权传输方式在所述第二CTU资源上传输信号。
  6. 根据权利要求2至5中的任一项所述的切换方法，其特征在于，所述CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU 的信息或者竞争接入区域的信息。
  7. 根据权利要求1至6中的任一项所述的切换方法，其特征在于，所述第一网络设备向第二网络设备发送切换请求消息之前，还包括：
    所述第一网络设备根据所述终端设备的测量报告信息和所述第一网络设备的负载信息中的至少一个，确定需要将所述终端设备切换到所述第二网络设备。
  8. 一种基于免授权传输的切换方法，其特征在于，包括：
    第二网络设备接收第一网络设备发送的切换请求消息，其中所述切换请求消息用于请求将终端设备从所述第一网络设备切换至所述第二网络设备进行免授权传输；
    第二网络设备确定将终端设备从所述第一网络设备切换至所述第二网络设备进行免授权传输；
    所述第二网络设备向所述第一网络设备发送切换请求确认消息，其中所述切换请求确认消息用于确认将所述终端设备从所述第一网络设备切换至所述第二网络设备进行免授权传输；
    所述第二网络设备盲检测所述终端设备采用免授权传输方式在CTU资源上传输的信号。
  9. 根据权利要求8所述的切换方法，其特征在于，所述切换请求确认消息包含所述第二网络设备允许所述终端设备使用的第二竞争接入区域或CTU资源的信息，所述切换指示消息包含所述第二竞争接入区域或所述CTU资源的信息，以便所述终端设备采用免授权传输方式使用在所述竞争接入区域或所述第二CTU资源的信息上进行免授权传输信号。
  10. 根据权利要求9所述的切换方法，其特征在于，所述切换请求消息包含所述终端设备在切换前进行免授权传输所使用的第一CTU资源的信息，
    其中所述第二网络设备盲检测所述终端设备采用免授权传输方式在CTU资源上传输的信号，包括：
    所述第二网络设备基于所述第二CTU资源盲检测所述终端设备采用免授权传输方式在所述第二CTU资源上传输的信号。
  11. 根据权利要求10所述的切换方法，其特征在于，在所述第二网络设备允许所述终端设备使用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源相同，
    或者，
    在所述第二网络设备不允许所述终端设备使用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源不同。
  12. 根据权利要求10或11所述的切换方法，其特征在于，所述第二网络设备确定将终端设备从所述第一网络设备切换至所述第二网络设备进行免授权传输，包括：
    所述第二网络设备根据所述第二网络设备的竞争接入区域的负载情况、所述第二网络设备的负载情况以及所述第一CTU资源中的至少一个，确定将所述终端设备切换到所述第二网络设备。
  13. 根据权利要求9所述的切换方法，其特征在于，所述切换请求消息包含用于指示所述终端设备支持免授权传输的信息，所述切换请求确认消息包含：所述第二网络设备允许所述终端设备使用的第二CTU资源的信息，所述切换指示消息包含所述第二网络设备允许所述终端设备使用的第二CTU资源的信息。
  14. 根据权利要求13所述的切换方法，其特征在于，所述第二网络设备确定将终端设备从所述第一网络设备切换至所述第二网络设备进行免授权传输，包括：
    根据所述第二网络设备的竞争接入区域的负载情况和所述第二网络设备的负载情况中的至少一个，确定将所述终端设备切换到所述第二网络设备。
  15. 根据权利要求9至13中的任一项所述的切换方法，其特征在于，所述CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
  16. 一种基于免授权传输的切换方法，其特征在于，包括：
    终端设备接收第一网络设备发送的切换指示消息，其中所述切换指示消息用于指示所述终端设备从所述第一网络设备切换至所述第二网络设备进行免授权传输；
    所述终端设备根据所述切换指示消息，采用免授权传输方式在竞争传输单元CTU资源上向所述第二网络设备传输信号。
  17. 根据权利要求16所述的切换方法，其特征在于，所述终端设备在切换前采用第一CTU资源进行免授权传输，所述切换指示消息包含所述第 二网络设备允许所述终端设备采用的第二CTU资源的信息，以便所述终端设备采用免授传输方式在所述第二竞争传输单元CTU资源上传输信号。
  18. 根据权利要求17所述的切换方法，其特征在于，
    在所述第二网络设备允许所述终端设备采用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源相同，
    或者，
    在所述第二网络设备不允许所述终端设备采用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源不同。
  19. 根据权利要求17所述的切换方法，其特征在于，所述终端设备根据所述切换指示消息，采用免授权传输方式在CTU资源上向所述第二网络设备传输信号，包括：
    所述终端设备根据切换指示消息中携带的第二CTU资源的信息，确定终端设备切换至第二网络设备进行免授权传输时所使用的CTU；
    所述终端设备采用免授权传输方式在所述CTU上传输信号。
  20. 根据权利要求19所述的切换方法，其特征在于，所述第二CTU资源为竞争接入区域，所述终端设备根据切换指示消息中携带的第二CTU资源的信息，确定终端设备切换至第二网络设备进行免授权传输时所使用的CTU，包括：
    所述终端设备根据切换指示消息中携带的竞争接入区域的信息，确定所述竞争接入区域中的CTU的数目；
    所述终端设备根据下列公式确定CTU：
    IndxCTU＝SigimodNCTU
    其中IndxCTU为CTU的索引号，mod表示取模，NCTU表示所述竞争接入区域中的CTU的数目，Sigi表示所述终端设备的码资源的索引。
  21. 根据权利要求17至19中的任一项所述的切换方法，其特征在于，所述CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
  22. 一种网络设备，其特征在于，包括：
    发送模块，用于向第二网络设备发送切换请求消息，其中所述切换请求消息用于请求将终端设备从所述网络设备切换至所述第二网络设备进行免 授权传输；
    接收模块，用于接收所述第二网络设备发送的切换请求确认消息，其中所述切换请求确认消息用于确认将所述终端设备从所述网络设备切换至所述第二网络设备进行免授权传输，其中所述发送模块还用于向所述终端设备发送切换指示消息，其中所述切换指示消息用于指示所述终端设备采用免授权传输方式在竞争传输单元CTU资源上向所述第二网络设备传输信号。
  23. 根据权利要求22所述的网络设备，其特征在于，所述切换请求确认消息包含所述第二网络设备允许所述终端设备使用的第二CTU资源的信息，所述切换指示消息包含所述第二CTU资源的信息，以便所述终端设备采用免授权传输方式在所述第二CTU资源上传输信号。
  24. 根据权利要求23所述的网络设备，其特征在于，所述切换请求消息包含所述终端设备在切换前进行免授权传输所采用的第一CTU资源的信息。
  25. 根据权利要求24所述的网络设备，其特征在于，在所述第二网络设备允许所述终端设备采用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源相同，
    或者，
    在所述第二网络设备不允许所述终端设备采用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源不同。
  26. 根据权利要求23所述的网络设备，其特征在于，所述切换请求消息包含用于指示所述终端设备支持免授权传输的信息，所述切换请求确认消息包含：所述第二网络设备允许所述终端设备使用的第二CTU资源的信息，所述切换指示消息包含所述第二网络设备允许所述终端设备使用的第二CTU资源的信息，以便所述终端设备采用免授权传输方式在所述第二CTU资源上传输信号。
  27. 根据权利要求23至26中的任一项所述的网络设备，其特征在于，所述CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
  28. 根据权利要求22至27中的任一项所述的网络设备，其特征在于，所述网络设备向第二网络设备发送切换请求消息之前，还包括：
    确定模块，用于根据所述终端设备的测量报告信息和所述网络设备的负 载信息中的至少一个，确定需要将所述终端设备切换到所述第二网络设备。
  29. 一种网络设备，其特征在于，包括：
    接收模块，用于接收第一网络设备发送的切换请求消息，其中所述切换请求消息用于请求将终端设备从所述第一网络设备切换至所述网络设备进行免授权传输；
    确定模块，用于确定将终端设备从所述第一网络设备切换至所述网络设备进行免授权传输；
    发送模块，用于向所述第一网络设备发送切换请求确认消息，其中所述切换请求确认消息用于确认将所述终端设备从所述第一网络设备切换至所述网络设备进行免授权传输；
    检测模块，用于盲检测所述终端设备采用免授权传输方式在CTU资源上传输的信号。
  30. 根据权利要求29所述的网络设备，其特征在于，所述切换请求确认消息包含所述网络设备允许所述终端设备使用的第二竞争接入区域或CTU资源的信息，所述切换指示消息包含所述第二竞争接入区域或所述CTU资源的信息，以便所述终端设备采用免授权传输方式使用在所述竞争接入区域或所述第二CTU资源的信息上进行免授权传输信号。
  31. 根据权利要求30所述的网络设备，其特征在于，所述切换请求消息包含所述终端设备在切换前进行免授权传输所使用的第一CTU资源的信息，其中所述检测模块基于所述第二CTU资源盲检测所述终端设备采用免授权传输方式在所述第二CTU资源上传输的信号。
  32. 根据权利要求31所述的网络设备，其特征在于，在所述网络设备允许所述终端设备使用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源相同，或者，在所述网络设备不允许所述终端设备使用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源不同。
  33. 根据权利要求31或32所述的网络设备，其特征在于，所述确定模块根据所述网络设备的竞争接入区域的负载情况、所述网络设备的负载情况以及所述第一CTU资源中的至少一个，确定将所述终端设备切换到所述网络设备。
  34. 根据权利要求30所述的网络设备，其特征在于，所述切换请求消 息包含用于指示所述终端设备支持免授权传输的信息，所述切换请求确认消息包含：所述网络设备允许所述终端设备使用的第二CTU资源的信息，所述切换指示消息包含所述网络设备允许所述终端设备使用的第二CTU资源的信息。
  35. 根据权利要求34所述的网络设备，其特征在于，所述确定模块根据所述网络设备的竞争接入区域的负载情况和所述网络设备的负载情况中的至少一个，确定将所述终端设备切换到所述网络设备。
  36. 根据权利要求30至34中的任一项所述的网络设备，其特征在于，所述CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
  37. 一种终端设备，其特征在于，包括：
    接收模块，用于接收第一网络设备发送的切换指示消息，其中所述切换指示消息用于指示所述终端设备从所述第一网络设备切换至所述第二网络设备进行免授权传输；
    发送模块，用于根据所述切换指示消息，采用免授权传输方式在竞争传输单元CTU资源上向所述第二网络设备传输信号。
  38. 根据权利要求37所述的终端设备，其特征在于，所述终端设备在切换前采用第一CTU资源进行免授权传输，所述切换指示消息包含所述第二网络设备允许所述终端设备采用的第二CTU资源的信息，以便所述终端设备采用免授传输方式在所述第二竞争传输单元CTU资源上传输信号。
  39. 根据权利要求38所述的终端设备，其特征在于，
    在所述第二网络设备允许所述终端设备采用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源相同，
    或者，
    在所述第二网络设备不允许所述终端设备采用所述第一CTU资源进行免授权传输的情况下，所述第二CTU资源与所述第一CTU资源不同。
  40. 根据权利要求38所述的终端设备，其特征在于，还包括：确定模块，用于根据切换指示消息中携带的第二CTU资源的信息，确定终端设备切换至第二网络设备进行免授权传输时所使用的CTU，其中所述发送模块采用免授权传输方式在所述CTU上传输信号。
  41. 根据权利要求40所述的终端设备，其特征在于，所述第二CTU资 源为竞争接入区域，所述确定模块根据切换指示消息中携带的竞争接入区域的信息，确定所述竞争接入区域中的CTU的数目；
    所述终端设备根据下列公式确定CTU：
    IndxCTU＝SigimodNCTU
    其中IndxCTU为CTU的索引号，mod表示取模，NCTU表示所述竞争接入区域中的CTU的数目，Sigi表示所述终端设备的码资源的索引。
  42. 根据权利要求38至40中的任一项所述的终端设备，其特征在于，所述CTU资源的信息包括时频资源、码资源和导频中的至少一个的信息、CTU的信息或者竞争接入区域的信息。
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