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WO2015003613A1 - Procédé et dispositif de transmission d'informations et de recherche de cellules - Google Patents

Procédé et dispositif de transmission d'informations et de recherche de cellules Download PDF

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Publication number
WO2015003613A1
WO2015003613A1 PCT/CN2014/081822 CN2014081822W WO2015003613A1 WO 2015003613 A1 WO2015003613 A1 WO 2015003613A1 CN 2014081822 W CN2014081822 W CN 2014081822W WO 2015003613 A1 WO2015003613 A1 WO 2015003613A1
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WO
WIPO (PCT)
Prior art keywords
cell
function
enb
supports
served
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/CN2014/081822
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English (en)
Chinese (zh)
Inventor
傅婧
刘佳敏
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Publication of WO2015003613A1 publication Critical patent/WO2015003613A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for information transmission and cell search. Background technique
  • the device to device (D2D) service is a new feature introduced in version 12 (R12).
  • the network side device such as UTRAN (Evolved UMTS Terrestrial Radio Access Network) NB (NodeB) , base station), eNB (evolved NodeB, evolved base station) under re-R12 E-UTRAN, and even some eNBs after R12) do not support this feature.
  • UTRAN Evolved UMTS Terrestrial Radio Access Network
  • NodeB NodeB
  • eNB evolved NodeB, evolved base station
  • UE user equipment
  • the centralized control mode of the network is adopted, that is, the uplink and downlink data of the UE are transmitted and received under the control of the network.
  • the communication between the UE and the UE is forwarded and controlled by the network. There is no direct communication link between the UE and the UE, and the UE does not allow itself to send uplink data.
  • D2D proximity services include the following two categories:
  • the UE uses Evolved Universal Terrestrial Radio Access (E-UTRA) to confirm that another UE is nearby.
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • the D2D UE can use the service to find nearby taxis, looking for them in the attached Near friends;
  • ProSe Communication A UE that is close to each other, by directly establishing a link between two UEs, as shown in FIG. 2, thus converting a communication link originally transmitted through the network into a local direct communication link. It saves a lot of bandwidth and network efficiency; or, two UEs close to each other can use direct link communication to obtain stable high-speed and low-cost communication services.
  • Proximity service communication is generally performed under network side control or assistance, and the eNB may even dynamically allocate resources for UEs that are close to service communication.
  • the D2D proximity service is not only suitable for commercial use UEs, but also for public safety UEs.
  • public safety such as public security, fire protection, and ambulance, special discovery and communication processes between terminals are required.
  • the D2D service is a new feature introduced by R12.
  • Network-side devices such as NB under UTRAN, eNB under pre-R12 E-UTRAN, and even some eNBs after R12
  • the above D2D service is performed under network control or assistance. If the D2D UE for commercial use selects a network that does not support the D2D service, the D2D service cannot be obtained; and for the public safety UE, it is under the network coverage without the D2D service.
  • Some special mechanisms may be used for proximity discovery and communication.
  • the embodiments of the present invention provide a method and a device for information transmission and cell search, which are used to ensure that a UE supporting the D2D function can obtain a D2D service in a timely manner and continuously.
  • the evolved base station eNB determines whether the cell served by the eNB supports the inter-device D2D function; the eNB notifies the user equipment UE whether the cell served by the eNB supports the inter-device D2D function.
  • the UE with the D2D function can obtain the D2D service in a timely and continuous manner as much as possible, thereby improving the user experience.
  • the eNB broadcasts to the UE, by using a system message, whether the cell served by the eNB supports the D2D function. Therefore, the UE can know whether the cell in its location supports the D2D function.
  • the eNB broadcasts to the UE through the system message whether the cell served by the eNB supports the proximity service discovery function and/or the proximity service communication function. Thereby, the UE can know whether the cell in its location specifically supports the proximity service discovery function and/or the proximity service communication function.
  • the method further includes: the eNB transmitting the D2D parameter to the UE. Therefore, the UE with D2D function, the UE with D2D function enabled, or / and the UE with the highest priority D2D function reside in the D2D cell earlier or longer.
  • the D2D parameter includes a cell reselection parameter. Therefore, the UE with D2D function, the UE with D2D function enabled, or / and the UE with the highest priority D2D function reside in the D2D cell earlier or longer.
  • the D2D parameter further includes a hysteresis value for serving the cell. Therefore, the UE with D2D function, the UE with D2D function enabled, or / and the UE with the highest priority D2D function reside in the D2D cell earlier or longer.
  • the D2D parameter further includes an offset value when the neighboring cell is reselected. Therefore, the D2D-capable UE, the D2D-enabled UE, or / and the UE with the highest priority D2D function reside in the D2D cell earlier or longer.
  • the method further includes:
  • the eNB informs the neighboring cell whether the cell served by the eNB supports the D2D function. Therefore, each cell learns whether its neighboring cell supports D2D function, facilitates cell handover, and selects a suitable D2D cell for the UE.
  • the method further includes:
  • the eNB knows whether the UE supports the D2D function and/or the priority of the D2D function supported by the UE, and selects the UE that supports the D2D function or the UE that is performing D2D communication or the UE that sets the D2D function to the highest priority during the mobile process.
  • a cell supporting the D2D function serves as a serving cell of the UE. Therefore, the D2D-capable UE, the D2D-enabled UE, or/and the UE with the highest priority D2D function are allowed to reside in the D2D cell as much as possible.
  • the method further includes:
  • the source eNB When an eNB handover occurs, the source eNB notifies the target eNB of the D2D function priority of the UE it serves.
  • the user equipment UE supporting the D2D function between the devices when determining that the currently camped cell does not support the D2D function, enables the D2D cell selection function and/or the D2D cell reselection function;
  • the UE selects to camp on the D2D cell according to whether the cell served by the eNB by the evolved base station eNB supports the D2D function.
  • the UE can obtain the D2D service in a timely and continuous manner, thereby improving the user experience.
  • the UE when it is determined that the currently camped cell does not support the D2D function, enables the D2D cell selection function and/or the D2D cell reselection function, including:
  • the UE If the cell currently camped by the UE does not support the D2D function, and the UE has enabled the D2D function and/or sets the D2D function to the highest priority, the UE enables the D2D cell selection function and/or the D2D cell reselection function. . After the UE selects to camp on the cell supporting the related D2D function through the D2D cell, the frequency of the cell is set to the highest priority, and the D2D cell reselection is performed.
  • the UE when the UE starts the D2D cell selection function, the UE selects to camp on the D2D cell according to whether the cell served by the eNB supports the D2D function, and the UE includes:
  • the universal terrestrial radio accesses the E-UTRA frequency point, and reads system information of the best signal quality cell at each E-UTRA frequency point, and determines whether the cell supports the D2D function by using the system information;
  • the UE selects a cell that camps on a D2D-capable function and satisfies a suitable normal cell condition, and sets the frequency of the zone to the highest priority.
  • the UE when the UE enables the D2D cell reselection function, the UE selects to camp on the D2D cell according to whether the cell served by the eNB supports the D2D function, including:
  • the UE performs cell reselection only on the searched D2D cell according to whether the cell served by the eNB supports the D2D function notification. Alternatively, if the serving cell or the neighboring cell is a D2D cell, the UE selects to camp on the D2D cell according to whether the cell served by the eNB supports the D2D function and the D2D parameter sent by the eNB.
  • the D2D parameter includes a cell reselection parameter. Therefore, the UE with D2D function, the UE with D2D function enabled, or / and the UE with the highest priority D2D function reside in the D2D cell earlier or longer.
  • the D2D parameter further includes a hysteresis value for serving the cell. Therefore, the UE with D2D function, the UE with D2D function enabled, or / and the UE with the highest priority D2D function reside in the D2D cell earlier or longer.
  • the D2D parameter further includes an offset value when the neighboring cell is reselected. Therefore, the D2D-capable UE, the D2D-enabled UE, or / and the UE with the highest priority D2D function reside in the D2D cell earlier or longer.
  • the supporting D2D function specifically having proximity service discovery capability and/or proximity service communication capability, is:
  • a UE having only the proximity service discovery capability when the current camping cell does not support the proximity service discovery function, enables the D2D cell selection function or the D2D cell reselection function; whether the UE supports the D2D according to the cell served by the eNB according to the eNB. Notification of the function, choose to camp on the D2D cell supporting the proximity service discovery function;
  • a UE having only the service communication capability can enable the D2D cell selection function or the D2D cell reselection function when the current camping cell does not support the proximity service communication function; whether the UE supports the D2D according to the cell served by the eNB according to the eNB. Notification of the function, selecting to camp on the D2D cell supporting the proximity service communication function;
  • a UE having both a proximity service discovery capability and a proximity service communication capability when the current camped cell does not support the proximity service discovery function or the proximity service communication function, the D2D cell selection function or the D2D cell reselection function is enabled; the UE according to the eNB Whether the transmitted cell served by the eNB supports the notification of the D2D function, and selects the D2D cell that camps on the proximity service discovery function or the D2D cell that supports the proximity service communication function.
  • the method further includes: when the UE reports the UE capability, reporting whether the UE supports the D2D function.
  • the eNB on the network side is made aware of whether the UE supports the D2D function.
  • the method further comprises at least one of the following steps:
  • the UE informs the eNB through the RRC message that the UE sets the D2D function to the highest priority; thus, the UE can select the D2D cell as the serving cell as much as possible.
  • the UE When the UE cancels the D2D function to the highest priority, the UE informs the eNB through the RRC message that the UE cancels the D2D function to the highest priority; thus, the UE can select the D2D cell that is interested in the UE as the serving cell.
  • the UE informs the eNB to which the currently camped cell belongs to the UE to set the D2D function to the highest priority through the RRC message. Thereby, the UE can be selected as much as possible to select the D2D cell as the serving cell.
  • a determining unit configured to determine whether the cell served by the eNB supports the inter-device D2D function
  • the notification unit is configured to notify the user equipment, whether the cell served by the eNB supports the inter-device D2D function.
  • the eNB provided by the embodiment of the present invention ensures that the D2D-capable UE can obtain the D2D service in a timely manner and continuously, thereby improving the user experience.
  • the determining unit may be a processor such as a CPU.
  • the notification unit may be an information transmitting device such as an antenna.
  • the notification unit broadcasts to the UE, through the system message, whether the cell served by the eNB supports the D2D function.
  • the notification unit broadcasts to the UE, by the system message, whether the cell served by the eNB supports the proximity service discovery function and/or the proximity service communication function.
  • the notification unit is further configured to:
  • the D2D parameters are sent to the UEs in the cell supporting the D2D function.
  • the D2D parameter includes a cell reselection parameter.
  • the D2D parameter further includes a hysteresis value for serving the cell.
  • the D2D parameter further includes an offset value when the neighboring cell is reselected.
  • the notification unit is further configured to:
  • the neighboring cell is notified whether the cell served by the eNB supports the D2D function.
  • the determining unit is further configured to:
  • the D2D function cell serves as the serving cell of the UE.
  • the notification unit is further configured to:
  • the D2D function priority of the UE served by the source eNB is notified to the target eNB.
  • An embodiment of the present invention provides an evolved base station eNB, including a processor and a data transceiver, where:
  • the processor is configured to: determine whether the cell served by the eNB supports inter-device D2D function; notify the user equipment UE whether the cell served by the eNB supports inter-device D2D function;
  • the data transceiver is configured to implement data transmission between the processor and the UE.
  • the D2D function unit is enabled to enable the D2D cell selection function and/or the D2D cell reselection function when the UE supports the D2D function between the devices and determines that the cell currently camped by the UE does not support the D2D function;
  • the cell selection unit is configured to select to camp on the D2D cell according to whether the cell served by the eNB transmitted by the evolved base station eNB supports the D2D function.
  • the UE can obtain the D2D service in a timely manner and continuously, thereby improving the user experience.
  • the enabled D2D functional unit and the cell selection unit are all implemented by a processor such as a CPU. If the cell currently camped by the UE does not support the D2D function, and the UE turns on the D2D function and/or sets the D2D function to the highest priority, the D2D function unit turns on the D2D cell selection function and/or the D2D cell. Reselect function.
  • the cell selection unit is specifically configured to:
  • the cell that is camped on to support the D2D function and satisfies the appropriate normal cell condition is selected, and the frequency of the cell is set to the highest priority.
  • the cell selection unit is specifically configured to:
  • the camping is performed according to whether the cell served by the eNB supports the D2D function, and the D2D parameter sent by the eNB is selected to camp on the D2D cell.
  • the D2D parameter includes a cell reselection parameter.
  • the D2D parameter further includes a hysteresis value for serving the cell.
  • the D2D parameter further includes an offset value when the neighboring cell is reselected.
  • the supporting D2D function specifically having proximity service discovery capability and/or proximity service communication capability, is:
  • the UE having only the proximity of the service discovery capability when the current camping cell does not support the proximity service discovery function, enables the D2D function unit to enable the D2D cell selection function or the D2D cell reselection function; the cell selection unit is served by the eNB according to the eNB. Whether the cell supports the notification of the D2D function, and chooses to camp the UE to the D2D cell supporting the proximity service discovery function; A UE having only the proximity service communication capability, when the current camping cell does not support the proximity service communication function, turning on the D2D function unit to enable the D2D cell selection function or the D2D cell reselection function; the cell selection unit is served by the eNB according to the eNB. Whether the cell supports the notification of the D2D function, selecting to camp the UE to the D2D cell supporting the proximity service communication function, and then turning off the D2D cell selection function;
  • a UE having both a proximity service discovery capability and a proximity service communication capability when the current camping cell does not support the proximity service discovery function or the proximity service communication function, the D2D function unit is enabled to enable the D2D cell selection function or the D2D cell reselection function;
  • the selecting unit selects to camp on the D2D cell supporting the proximity service discovery function or the D2D cell supporting the proximity service communication function according to the notification sent by the eNB whether the cell served by the eNB supports the D2D function, and then close the D2D cell selection function. .
  • the UE further includes:
  • the reporting unit is configured to report whether the UE supports the D2D function when the UE capability reports.
  • the reporting unit is further configured to perform at least one of the following steps:
  • the eNB is notified by the RRC message that the UE sets the D2D function to the highest priority;
  • the eNB When the UE cancels the D2D function as the highest priority, the eNB is notified by the RRC message that the UE cancels the D2D function as the highest priority;
  • the eNB informs the eNB to which the currently camped cell belongs to the UE to set the D2D function to the highest priority.
  • a user equipment includes a processor and a data transceiver, where: the processor is configured to: when the UE supports inter-device D2D function and determines that the cell currently camped by the UE does not support When the D2D function is enabled, the D2D cell selection function and/or the D2D cell reselection function is enabled; and the camping to the D2D cell is selected according to whether the cell served by the eNB by the evolved base station eNB supports the D2D function.
  • the data transceiver transmits and receives data under the control of the processor.
  • the technical solution provided by the embodiment of the present invention ensures that the UE with the D2D function can obtain the D2D service in a timely and continuous manner as much as possible, thereby improving the user experience.
  • 1 is a schematic diagram of the principle of an existing mobile communication system
  • FIG. 3 is a schematic flowchart of a method for sending information according to an embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of a cell search method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an eNB according to an embodiment of the present disclosure.
  • FIG. 5B is a schematic structural diagram of a corresponding implementation of an eNB according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a UE according to an embodiment of the present disclosure.
  • FIG. 6B is a schematic structural diagram of a corresponding implementation of a UE according to an embodiment of the present invention. detailed description
  • the embodiments of the present invention provide a method and a device for information transmission and cell search, which are used to ensure that a UE supporting the D2D function can obtain a D2D service in a timely manner and continuously.
  • the technical solution proposed by the embodiment of the present invention is a mechanism for supporting D2D service continuity, thereby ensuring that the D2D UE obtains the D2D service in a timely manner and continuously.
  • the eNB broadcasts a corresponding indication to inform the UE whether the current base station supports the related D2D function.
  • the eNB broadcasts a special cell reselection parameter for the D2D-enabled cell (referred to as a D2D cell for short), so that the UE can be quickly stabilized.
  • the UE is in the D2D cell, and the eNB is informed of the priority of the D2D function, so that the eNB selects the D2D cell as the serving cell as much as possible according to the capability, state, or UE reporting of the UE;
  • the broadcast indication and its own state, the operation of the associated preferred D2D cell is performed at the time of cell reselection.
  • an information sending method provided by an embodiment of the present invention includes:
  • the evolved base station eNB determines whether a cell served by the eNB supports an inter-device D2D function.
  • the eNB broadcasts to the UE through the system message whether the cell served by the eNB supports the D2D function.
  • the eNB broadcasts to the UE, by using a system message, whether the cell served by the eNB supports the D2D function, including:
  • the eNB broadcasts to the UE through the system message whether the cell served by the eNB supports the proximity service discovery function and/or the proximity service communication function.
  • the method further includes:
  • the eNB transmits the D2D parameters to the UEs in the cell supporting the D2D function.
  • the D2D parameter includes a cell reselection parameter.
  • the D2D parameter further includes a hysteresis value for the serving cell served by the eNB.
  • the D2D parameter further includes an offset value when the neighboring cell is reselected.
  • the method further includes:
  • the eNB informs the neighboring cell whether the cell served by the eNB supports the D2D function, and the eNB to which the neighboring cell belongs can receive the notification.
  • the method further includes:
  • the eNB learns whether the UE supports the D2D function and/or the priority of the D2D function supported by the UE, and is a D2D-capable UE or a D2D-capable UE and supports D2D function and D2D function during the mobile process.
  • the UE set to the highest priority selects a cell supporting the D2D function as the serving cell of the UE.
  • the method further includes:
  • the source eNB When an eNB handover occurs, the source eNB notifies the target eNB of the D2D function priority of the UE it serves.
  • a cell selection method includes: 5201.
  • the UE selects to camp on the D2D cell according to whether the cell served by the eNB by the evolved base station eNB supports the D2D function.
  • the UE is an idle UE.
  • the UE when it is determined that the currently camped cell does not support the D2D function, enables the D2D cell selection function and/or the D2D cell reselection function, including:
  • the UE If the cell currently camped by the UE does not support the D2D function, and the UE has enabled the D2D function and/or sets the D2D function to the highest priority, the UE enables the D2D cell selection function and/or the D2D cell reselection function. .
  • the UE when the UE starts the D2D cell selection function, the UE selects to camp on the D2D cell according to whether the cell served by the eNB supports the D2D function, and includes:
  • the UE searches for the evolved universal terrestrial radio access E-UTRA frequency point available around, and reads system information of the signal quality optimal cell on each E-UTRA frequency point, and determines whether the cell supports D2D through the system information.
  • the UE selects a cell that camps on a D2D-capable function and satisfies a suitable normal cell condition, and sets the frequency of the zone to the highest priority.
  • the UE selects to camp on the D2D cell according to the notification that the cell served by the eNB supports the D2D function, including the eNB, in performing the cell reselection process.
  • the UE performs cell reselection only on the searched D2D cell according to whether the cell served by the eNB supports the D2D function notification.
  • the UE sends a notification according to whether the cell served by the eNB supports the D2D function, and the D2D parameter sent by the eNB, according to the eNB, choose to camp on the D2D cell.
  • the D2D parameter includes a cell reselection parameter.
  • the D2D parameter further includes a hysteresis value for serving the cell.
  • the D2D parameter further includes an offset value when the neighboring cell is reselected.
  • the supporting D2D function specifically having proximity service discovery capability and/or proximity service communication capability, is:
  • a UE having only the proximity service discovery capability when the current camping cell does not support the proximity service discovery function, enables the D2D cell selection function or the D2D cell reselection function; whether the UE supports the D2D according to the cell served by the eNB according to the eNB. Notification of the function, choose to camp on the D2D cell supporting the proximity service discovery function;
  • a UE having only the service communication capability can enable the D2D cell selection function or the D2D cell reselection function when the current camping cell does not support the proximity service communication function; whether the UE supports the D2D according to the cell served by the eNB according to the eNB. Notification of the function, selecting to camp on the D2D cell supporting the proximity service communication function;
  • a UE having both a proximity service discovery capability and a proximity service communication capability when the current camped cell does not support the proximity service discovery function or the proximity service communication function, the D2D cell selection function or the D2D cell reselection function is enabled; the UE according to the eNB Whether the transmitted cell served by the eNB supports the notification of the D2D function, and selects the D2D cell that camps on the proximity service discovery function or the D2D cell that supports the proximity service communication function.
  • the method further includes:
  • the UE When the UE reports the UE capability, it reports whether it supports the D2D function.
  • the method further includes at least one of the following steps: If the UE sets the D2D function to the highest priority, the UE informs the eNB by using an RRC message that the UE sets the D2D function to the highest priority. Level
  • the UE When the UE cancels the D2D function to the highest priority, the UE informs the eNB by the RRC message that the UE cancels the D2D function as the highest priority; After the cell handover, if the UE does not report that the D2D function is set to the highest priority before the cell handover, the UE informs the eNB to which the currently camped cell belongs to the UE to set the D2D function to the highest priority through the RRC message.
  • the RRC idle (idle) state the D2D-capable UE performs D2D cell selection.
  • the eNB broadcasts a corresponding indication, and informs the UE whether the current base station supports the related D2D function. If the current camped cell does not support the related D2D function, the UE starts the D2D cell selection function, and the UE selects the D2D cell through the D2D cell. After leaving the cell supporting the relevant D2D function, the frequency point where the cell is located is set to the highest priority, and D2D cell reselection is performed.
  • the eNB broadcasts the cell to support the D2D function; since the D2D service is further divided into the proximity service discovery and the proximity service communication, the support service discovery function and/or may be further indicated in the system message. Support for proximity service communication.
  • the RRC idle state UE supporting the D2D function if the current camping cell does not support the D2D function, the UE starts the D2D cell selection process or the D2D cell reselection process.
  • the D2D cell selection process is specifically: not considering the cell reselection priority, but searching all available E-UTRA frequency points according to its capability, and at least the signal quality optimal cell reading system for each E-UTRA frequency point.
  • the information confirms whether it supports the D2D function. If the cell with the best signal quality (or the highest order) at a certain frequency point supports the D2D function and satisfies the condition of the suitable cell, the UE selects the cell, and the cell is located. The frequency is set to the highest priority, and the D2D cell selection function is stopped, and the D2D cell reselection process is performed. If a suitable D2D cell is not found, the UE may perform the D2D cell selection function regularly, and the period may be implemented by the UE.
  • the UE side initiates D2D cell selection and/or D2D according to its own functions and the D2D function of the network side.
  • the conditions and processes of the cell reselection function have changed somewhat. Chemical.
  • a UE with proximity service discovery capability initiates D2D cell selection and/or D2D cell reselection when the camped cell does not support the proximity service discovery function.
  • the selective proximity service discovery function also needs to be selected. The D2D cell will stop the D2D cell selection function.
  • the conditions and procedures for initiating D2D selection and/or D2D cell reselection are similarly changed. If the UE has both proximity service discovery capability and proximity service communication capability, the UE only needs to select to support proximity service. Discover the function or the cell that supports the service communication function.
  • the D2D cell reselection process can be implemented in two ways:
  • the first type In the D2D cell reselection process, the UE only performs cell reselection judgment on the searched D2D cell, and the cell reselection determination rule is the same as the existing cell reselection rule; only there is no suitable D2D cell at present. At the same time, the ordinary cell selection or reselection process is performed, and the above D2D cell selection process is simultaneously performed;
  • the second type In the D2D cell reselection process, if the serving cell or the neighboring cell is a D2D cell, the special D2D parameter is added when the cell is reselected, so that the UE can select the D2D cell for a longer time and more easily. See Embodiment 3 (Note: In this process, a D2D cell and a normal cell are included).
  • the UE that enables the D2D function performs D2D cell selection.
  • the UE when the D2D-enabled UE enables the D2D function, or/and the UE sets the D2D function to the highest priority, the UE starts the D2D if the current camping cell does not support the related D2D function. Cell selection function or D2D cell reselection process.
  • the eNB broadcasts the cell to support the D2D function through a system message (such as SIB1 or a new SIB); or broadcasts the cell to support the proximity service discovery function and/or the proximity service communication function.
  • a system message such as SIB1 or a new SIB
  • the RRC idle state UE supporting the D2D function if the D2D function is not enabled, or/and the UE does not set the D2D function to the highest priority, the UE performs only normal cell reselection; when the UE starts D2D
  • the function, or/and the UE sets the D2D function to the highest priority if the current camping cell does not support the related D2D function, the UE starts the D2D cell selection function or the D2D cell reselection process, and the D2D cell selection process and the embodiment 1 is the same, the possible difference is that the D2D cell selection period may be implemented by the UE or by the D2D service application layer; after the UE selects the D2D cell, the D2D cell reselection is performed subsequently, as in Embodiment 1.
  • the UE When the UE turns off the D2D function, or when the UE no longer sets the D2D function to the highest priority, the UE correspondingly closes the D2D cell selection process or the D2D cell reselection process (if it is currently in progress), and the related D2D is no longer used.
  • the frequency at which the cell is located is set to the highest priority.
  • the network side will further support the D2D function to support the proximity service discovery function and/or support the proximity service communication function, there are some changes in the conditions and procedures for initiating the D2D cell selection function or D2D cell reselection, such as UEs with proximity service discovery capability.
  • the D2D cell selection function or the D2D cell reselection is enabled; the D2D cell selection process is also for finding the support proximity service discovery function. D2D cell.
  • the eNB broadcasts special cell reselection parameters for supporting D2D functions.
  • the eNB broadcasts some special cell reselection parameters for D2D cell reselection, so that the D2D-capable UE, the D2D-enabled UE, or/and the D2D function as the highest priority (or interested) UE, earlier The longer or longer camping on the D2D cell; after the UE camps on the D2D cell, if the frequency point of the cell is not the highest priority, the frequency point is set to the highest priority.
  • the UE can more easily select the D2D cell when performing cell reselection of the same frequency or the same frequency.
  • the eNB In addition to broadcasting the existing cell reselection parameters, if the eNB has the D2D function, it broadcasts an additional hysteresis value of the serving cell priority parameter Qhyst_D2D; if there is a neighboring area with D2D function, an additional broadcast is broadcast for the neighboring area.
  • the offset value (offset) of the neighboring cell priority parameter that is, Qoffsets, n - D2D.
  • the Idle state UE performs cell reselection through the R criterion when performing cell reselection of the same frequency or the same priority inter-frequency.
  • Rs represents the priority parameter of the serving cell
  • Rn represents the priority parameter of the neighboring cell, which is defined as follows:
  • Rn Qmeas,n - Qoffset
  • Qmeas represents the cell reselection reference signal received power (RSRP) measurement.
  • RSRP cell reselection reference signal received power
  • QHyst indicates the hysteresis value, which is set for the serving cell. It can be understood that when a cell is used as a serving cell, there is a hysteresis to prevent the ping-pong effect.
  • the R criterion is a criterion specified in the existing protocol, and the R value formula obtained by the serving cell and the neighboring cell is as shown in the box.
  • the R value is sorted, and the selected value is the largest. That serves as a service community.
  • Each of the above parameters can be notified to the UE after being pre-configured by the network side base station.
  • the UE When performing cell reselection, the UE needs to compare the priority parameters of each cell and select the cell corresponding to the largest priority parameter.
  • the UE sorts all cells that satisfy the S criterion. If a cell is sorted as the best cell, the UE reselects the cell to the cell.
  • the R sorting formula becomes (red is the increasing part):
  • the UE can camp on the D2D cell earlier or longer.
  • the frequency point at which the cell is located is not the highest priority
  • the frequency point is set to the highest priority; when the UE leaves the D2D cell camping on other frequency points, or the D2D function is turned off; or When D2D is no longer of interest, the highest priority setting of the frequency point is canceled, and the original priority is restored.
  • a special cell reselection parameter for the D2D cell including not only the offset in the R criterion, but also other cell reselection parameters, such as a D2D cell broadcast special Snonintrasearch, if the UE resides in the current D2D cell, if the service When the S value of the cell is larger than Snonintrasearch, the measurement of the same priority or the lower priority frequency is not performed.
  • special parameters are set for the D2D cell.
  • the eNB In the RRC connected state, the eNB guarantees continuity according to the capabilities of the UE.
  • the eNB selects the D2D cell as the serving cell for the UE supporting the D2D function or the D2D-capable UE.
  • the UE When the UE reports the UE capability, it reports whether it supports the D2D function.
  • the eNB mutually informs whether the cell serving as a neighboring cell supports the D2D function
  • the eNB obtains whether the UE supports the D2D function by using the UE capability; since the D2D is controlled by the eNB, the eNB can determine whether the UE is performing D2D;
  • the eNB supports the D2D cell as the serving cell as much as possible for the UE supporting the D2D function or the UE performing the D2D communication.
  • the eNB In the RRC connected state, the eNB guarantees continuity according to the priority reported by the UE.
  • the connected UE informs the eNB of its preference, and the UE selects the D2D cell as the serving cell as much as possible for the UE that sets the D2D function to the highest priority (or is interested) during the mobile process.
  • the UE informs the eNB through the RRC message; when the UE cancels the D2D function as the highest priority, the eNB needs to be notified by a message. After the handover occurs, the UE also needs an RRC message to inform the eNB whether the current D2D function is the highest priority (or interested) if it has not been previously selected.
  • the eNB mutually informs whether the cell as a neighboring area supports the D2D function
  • the source eNB informs the target eNB of the D2D function priority (or interest) of the UE through the inter-node message;
  • the eNB sets the D2D function to the highest priority (or interest) during the move.
  • the UE tries to select the D2D cell as the serving cell.
  • an evolved base station eNB includes: a determining unit 11 configured to determine whether a cell served by the eNB supports an inter-device D2D function; and a notification unit 12, configured to notify a user equipment Whether the UE supports the inter-device D2D function by the cell served by the eNB.
  • the notification unit 12 broadcasts to the UE, through the system message, whether the cell served by the eNB supports the D2D function.
  • the notification unit 12 broadcasts to the UE, through the system message, whether the cell served by the eNB supports the proximity service discovery function and/or the proximity service communication function.
  • the notification unit 12 is further configured to:
  • the D2D parameters are sent to the UEs in the cell supporting the D2D function.
  • the D2D parameter includes a cell reselection parameter.
  • the D2D parameter further includes a hysteresis value for serving the cell.
  • the D2D parameter further includes an offset value when the neighboring cell is reselected.
  • the notification unit 12 is further configured to:
  • the neighboring cell is notified whether the cell served by the eNB supports the D2D function.
  • the determining unit 11 is further configured to:
  • the D2D function cell serves as the serving cell of the UE.
  • the notification unit 12 is further configured to:
  • the D2D function priority of the UE served by the source eNB is notified to the target eNB.
  • An embodiment of the present invention provides an evolved base station eNB, as shown in FIG. 5B, including a processor 500 and a data transceiver 510, where:
  • the processor 500 is configured to: determine whether the cell served by the eNB supports the inter-device D2D function; notify the user equipment UE whether the cell served by the eNB supports the inter-device D2D function; the data transceiver 510 is configured to implement the processing Data transfer between the device and the UE.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 500 and various circuits of memory represented by memory 520.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Data transceiver 710 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.
  • a user equipment UE is provided in the embodiment of the present invention.
  • the UE includes: an D2D function unit 21, configured to: when the UE supports D2D function between devices, and determines that a cell currently camped by the UE does not support D2D function.
  • an D2D function unit 21 configured to: when the UE supports D2D function between devices, and determines that a cell currently camped by the UE does not support D2D function.
  • the D2D cell selection function and/or the D2D cell reselection function is enabled
  • a cell selection unit 22 configured to send, according to the evolved base station eNB, a small service served by the eNB Whether the zone supports the notification of the D2D function, and chooses to camp on the D2D cell.
  • the UE is an idle UE.
  • the D2D function unit turns on the D2D cell selection function and / or D2D cell reselection function.
  • the cell selection unit 22 is specifically configured to:
  • the cell that is camped on to support the D2D function and satisfies the appropriate normal cell condition is selected, and the frequency of the cell is set to the highest priority.
  • the cell selection unit is specifically configured to:
  • the camping is performed according to whether the cell served by the eNB supports the D2D function, and the D2D parameter sent by the eNB is selected to camp on the D2D cell.
  • the D2D parameter includes a cell reselection parameter.
  • the D2D parameter further includes a hysteresis value for serving the cell.
  • the D2D parameter further includes an offset value when the neighboring cell is reselected.
  • the supporting D2D function specifically having proximity service discovery capability and/or proximity service communication capability, is:
  • the cell selection unit selects to camp the UE to the D2D cell supporting the proximity service discovery function according to whether the cell served by the eNB supports the D2D function.
  • a UE having only the proximity service communication capability when the current camping cell does not support the proximity service communication function, turning on the D2D function unit to enable the D2D cell selection function or the D2D cell reselection function; the cell selection unit is served by the eNB according to the eNB. Whether the cell supports the notification of the D2D function, and selects to camp the UE to the D2D cell supporting the proximity service communication function;
  • a UE having both a proximity service discovery capability and a proximity service communication capability when the current camping cell does not support the proximity service discovery function or the proximity service communication function, the D2D function unit is enabled to enable the D2D cell selection function or the D2D cell reselection function;
  • the selection unit selects to camp on the D2D cell supporting the proximity service discovery function or the D2D cell supporting the proximity service communication function according to the notification sent by the eNB whether the cell served by the eNB supports the D2D function.
  • the UE when the UE is a connected UE, the UE further includes:
  • the reporting unit 23 is configured to report whether the UE supports the D2D function when the UE capability reports. Preferably, when the UE is a connected UE, the reporting unit 23 is further configured to perform at least one of the following steps:
  • the eNB is notified by the RRC message that the UE sets the D2D function to the highest priority;
  • the eNB When the UE cancels the D2D function as the highest priority, the eNB is notified by the RRC message that the UE cancels the D2D function as the highest priority;
  • the eNB informs the eNB to which the currently camped cell belongs to the UE to set the D2D function to the highest priority.
  • a user equipment UE includes a processor 600 and a data transceiver 610, where:
  • the processor 600 is configured to: when the UE supports the inter-device D2D function and determines that the cell currently camped by the UE does not support the D2D function, enable the D2D cell selection function and/or the D2D cell reselection function; according to the evolved type Whether the cell served by the eNB transmitted by the base station eNB supports D2D Notification of the function, choose to camp on the D2D cell;
  • the data transceiver 610 transmits and receives data under the control of the processor 600.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 600 and various circuits of memory represented by memory 620.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Data transceiver 610 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 in performing operations.
  • the present invention provides a mechanism for supporting D2D service continuity, allowing D2D UEs to stay or connect to D2D cells as much as possible during the mobile process, thereby ensuring that D2D UEs can obtain D2D in a timely and continuous manner. Service, enhance the user experience.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
  • a computer-usable storage medium including but not limited to disk storage and optical storage, etc.
  • These computer program instructions can also be stored in a bootable computer or other programmable data processing device.
  • a computer readable memory that operates in a particular manner, causing instructions stored in the computer readable memory to produce an article of manufacture comprising instruction means implemented in one or more flows and/or block diagrams of the flowchart The function specified in the box or in multiple boxes.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention vise à s'assurer qu'équipement d'utilisateur (UE) qui prend en charge une fonction de D2D est autorisé à acquérir un service de D2D en temps opportun et de façon continue. L'invention concerne un procédé et un dispositif de transmission d'informations et de recherche de cellules. Le procédé de transmission d'informations de la présente invention comprend les étapes suivantes : une station de base de nœud évolué (eNB) détermine qu'une cellule qui est desservie par l'eNB prend en charge une fonction D2D inter-dispositifs ; et, l'eNB notifie à un équipement d'utilisateur (UE) le fait de savoir si oui ou non la cellule qui est desservie par l'eNB prend en charge la fonction D2D inter-dispositifs.
PCT/CN2014/081822 2013-07-09 2014-07-08 Procédé et dispositif de transmission d'informations et de recherche de cellules Ceased WO2015003613A1 (fr)

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CN106034283A (zh) * 2015-03-19 2016-10-19 阿尔卡特朗讯 智能设备与移动硬盘之间直接通信连接的方法与设备
CN106535084A (zh) * 2015-09-11 2017-03-22 展讯通信（上海）有限公司 Mtc终端控制方法及装置
EP3518582B1 (fr) * 2016-11-04 2020-09-30 LG Electronics Inc. -1- Procédé et terminal pour effectuer une procédure de resélection de cellule

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