WO2019192000A1

WO2019192000A1 - Communication method and apparatus

Info

Publication number: WO2019192000A1
Application number: PCT/CN2018/082055
Authority: WO
Inventors: 李晨琬; 于映辉
Original assignee: 华为技术有限公司
Priority date: 2018-04-04
Filing date: 2018-04-04
Publication date: 2019-10-10

Abstract

A communication method and apparatus that are used to solve the problem in existing technology in which the probability of a terminal device being re-selected to a target cell that supports a positioning service is small. In the present application, a terminal device selects one candidate cell from in a candidate cell set as a target cell, the candidate cell set comprising at least one candidate cell; and the terminal device is re-selected from a source cell to within the target cell, wherein the target cell is a cell that supports a positioning service, and the source cell is a cell at which the terminal device resides before cell re-selection. By using the manner of the present application, the selected target cell supports the positioning service, and the terminal device may be guaranteed to still be able to perform positioning after switching to the target cell. The method provided in the present embodiment may be applied to a communication system, such as V2X, LTE-V, V2V, Internet of Vehicles, MTC, IoT, LTE-M, M2M, Internet of Things, and the like.

Description

Communication method and device

Technical field

The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background technique

When the terminal device determines that the signal quality of the current camping cell is degraded, or the terminal device moves, the target cell is selected from the neighboring cells of the camping cell to perform cell reselection, and the cell reselection can be performed mainly by: .

First, when the frequency of the camping cell and the neighboring cell are the same or the priorities are the same, the terminal device performs cell reselection according to the R criterion.

Specifically, the terminal device calculates the R value of the camped cell and the neighboring cell, where the R value is determined according to the reference signal received power (RSRP) measurement value and the offset of the inter-frequency of the cell, The R values of the neighboring cell and the neighboring cell are sorted, and the cell with the largest R value is selected.

Second, the priority of the camping cell and the neighboring cell is different, and the terminal equipment performs cell reselection according to the signal quality of the cell.

Specifically, if the priority of the neighboring cell is high, the terminal device measures the signal quality of the neighboring cell, and if the signal quality of the neighboring cell is greater than the first threshold, the neighboring cell is selected.

If the priority of the neighboring cell is low, the neighboring cell is selected when the terminal device determines that the signal level or quality of the currently camped cell is equal to or lower than the second threshold, and the signal quality of the neighboring cell is greater than the first threshold.

It can be seen from the above two methods that when the terminal device performs reselection, the cell with better signal quality is selected. For the terminal device that needs to locate the service, when the cell is reselected, the target cell after the reselection cannot be guaranteed. The positioning service, that is, whether the target cell after the reselection broadcasts the positioning system message has randomness, and the probability of being able to reselect the target cell supporting the positioning service is small; and after the terminal device cell is reselected, after receiving the reselection The positioning system message of the target cell, after performing cell reselection, can only obtain a high-precision solution when the information of the positioning system message broadcasted by the target cell is received and saved after the terminal device is reselected to the target cell. High-precision positioning is performed, that is, after the terminal device performs cell reselection, the positioning cannot be performed immediately, so that the positioning service of the terminal device is interrupted.

Summary of the invention

The present application provides a communication method and apparatus for solving the problem that the probability of the terminal equipment being reselected to the target cell supporting the positioning service is small in the prior art.

In a first aspect, the embodiment of the present application provides a communication method, which may be performed by a terminal device, a chip or chip system in a terminal device, or a device such as a cloud device, where the method includes: the terminal device from the candidate cell set Selecting one candidate cell as the target cell, the candidate cell set including at least one candidate cell; the terminal device reselecting from the source cell to the target cell, where the target cell is a cell supporting a positioning service, the source The cell is a cell in which the terminal device camps before cell reselection.

The above method can ensure that the terminal device can still perform positioning after switching to the target cell, because the target cell supports the location service.

a possible implementation manner, the priority of the target cell is not lower than the priority of the source cell, where the target cell is the candidate cell with the highest priority among the candidate cell sets, where the source cell and the source cell are For any candidate cell, the priority of the cell supporting the positioning service is higher than the priority of the cell not supporting the positioning service.

In the above method, the target cell reselects the target cell to support the location service when the cell is reselected, so that the terminal device can perform positioning after the cell reselection.

In a possible design, the priority is obtained by the terminal device from system broadcast or unicast, and the priority includes a priority of the source cell and a part or all of a priority of the candidate cell. .

Through the foregoing method, the terminal device can quickly and conveniently obtain the priority of the source cell and the priority of the candidate cell, and can select the target cell more conveniently and efficiently, and can improve the efficiency of cell reselection.

In a possible design, the R value of the target cell is higher than the R value of the source cell, where the target cell is a candidate cell with the highest R value calculated based on the R criterion in the candidate cell set, the candidate cell The R value calculated based on the R criterion is determined according to the positioning offset of the candidate cell, and the R value calculated by the R criterion based on the source cell is determined according to the positioning offset of the source cell.

Through the foregoing method, since the R value is determined according to the positioning offset amount, when determining the target cell, it may be considered whether the cell supports the positioning service, and the selected target cell supports the positioning service, so that the terminal device cannot be reselected after the cell is reselected. The case of positioning.

In a possible design, the positioning offset is obtained by the terminal device from system broadcast or unicast, and the positioning offset includes a positioning offset of the source cell and the candidate The positioning offset of the cell is partially or completely.

Through the foregoing method, the terminal device can quickly and conveniently obtain the priority of the source cell and the R value of the candidate cell, and can select the target cell more conveniently and efficiently, and can improve the efficiency of cell reselection.

In a possible design, the R value calculation of the source cell meets the following formula requirements:

R _s =Q _meas,s +Q _Hyst -Qoffset _temp+ offsetpos

Wherein, Q _{meas, s} is a reference signal received power RSRP measurement value of the source cell, Q _Hyst is a hysteresis amount of the source cell, Qoffset _temp is a temporary compensation value of the source cell, and Offsetpos is a source cell Positioning offset

The R value calculation of the candidate cell meets the following formula requirements:

R _n =Q _meas,n -Qoffset-Qoffset _temp+ offsetpos

Wherein, Q _{meas, n} is an RSRP measurement value of the candidate cell, Qoffset is an offset of the candidate cell, Qoffset _temp represents a temporary compensation value for the candidate cell, and Offsetpos is a positioning offset of the candidate cell. the amount.

Through the above method, the calculation of the R value takes into consideration the signal quality and the positioning offset of the cell, so that the target cell signal quality determined according to the R value is good, and the probability of supporting the positioning service is also increased, and it is more likely to avoid the terminal device. The case where positioning cannot be performed after reselecting a cell.

R _s =Q _meas,s +Q _Hyst -Qoffset _temp -offsetpos

Where Q _{meas, s} is the RSRP measurement value of the source cell, Q _Hyst is the hysteresis amount of the source cell, Qoffset _temp is the temporary compensation value of the source cell, and Offsetpos is the positioning offset of the source cell. ;

R _n =Q _meas,n -Qoffset-Qoffset _temp -offsetpos

Through the above method, the calculation of the R value takes into consideration the signal quality and the positioning offset of the cell, so that the target cell signal quality determined according to the R value is good, and the probability of supporting the positioning service is also increased, and the terminal device is prevented from reselecting the cell. It is not possible to perform positioning afterwards.

The present application provides a method and an apparatus for locating a terminal device to generate an interruption problem in a terminal device after performing cell reselection in the prior art.

In a second aspect, the embodiment of the present application provides a communication method, which may be performed by a terminal device, a chip or a chip system in a terminal device, or a device such as a cloud device, where the method includes: receiving, by the terminal device, the first positioning assistance. Data and second positioning assistance data, wherein the first positioning assistance data is positioning assistance data sent by the terminal device from the source cell to the target cell before the target cell, the second positioning assistance data Positioning assistance data sent by the target cell after the terminal device reselects from the source cell to the target cell; the terminal device performs positioning according to the first positioning assistance data and the second positioning assistance data.

The first location assistance data sent by the target cell is received by the terminal device before the source cell is reselected to the target cell, and the first received before the cell is reselected. The positioning assistance data and the second positioning assistance data received after the reselection are positioned to ensure that the positioning service of the terminal device is not interrupted.

In a possible design, before the terminal device performs positioning according to the first positioning assistance data and the second positioning assistance data, the terminal device first determines a positioning reference station of the target cell and the source cell. The positioning reference station is different.

In the above method, if the positioning reference station of the target cell is different from the positioning reference station of the source cell, the terminal device may perform positioning by using the first positioning assistance data and the second positioning assistance data, and the terminal device may be secured. After the cell is reselected, the positioning service is continued without interruption.

In a possible design, the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and the terminal device is configured according to the second positioning assistance data and the third positioning assistance data. The positioning is performed, wherein the third positioning assistance data is positioning assistance data that is sent by the source cell before the terminal device switches to the target cell, and is saved by the terminal device.

In the above method, the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and the third positioning reference information received by the terminal device from the source cell before reselection is still The continuation can be continued, and the positioning can be continued by using the second positioning assistance data and the third positioning assistance data, so that the positioning service of the terminal device is not interrupted.

In a possible design, before determining whether the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the terminal device determines a positioning reference station of the target cell and the source cell. Positioning a reference station, the terminal device reads the first positioning assistance data; and then determining a positioning reference station of the target cell according to the first positioning assistance data; the terminal device determining, according to the third positioning assistance data, a positioning reference station of the source cell, where the third positioning assistance data is positioning positioning data that is sent by the source cell and is sent by the source cell before the terminal device switches to the target cell.

Through the foregoing method, the terminal device can quickly and conveniently determine the positioning reference station of the target cell and the source cell according to the first positioning assistance data and the third positioning assistance data.

In a possible design, before the terminal device determines the positioning reference station of the target cell according to the first positioning assistance data, the terminal device determines that the target cell meets part or all of the following conditions:

Condition 1. The signal quality of the target cell is greater than a set threshold;

Condition 2: the priority of the target cell is higher than the priority of the source cell;

Condition 3: The R value of the target cell is higher than the R value of the source cell;

Condition 4: The target cell supports a positioning service;

Before the first positioning assistance data is read to determine the positioning reference station of the target cell, whether the operation of determining the positioning reference station of the target cell needs to be performed may be performed according to the preset condition, if the preset reference condition is not met, The positioning reference station of the target cell may be undefined, so that the manner of determining the positioning reference station of the target cell is more flexible.

In a possible design, after the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the terminal device deletes the first positioning assistance data.

In the above method, the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and deleting the first positioning assistance data can effectively save storage space.

In a possible design, the first positioning assistance data and the second positioning assistance data are unicast or broadcasted by the target cell, and the third positioning assistance data is the source cell unicast or broadcast. of.

Through the above method, a plurality of manners of receiving positioning assistance data are provided, and positioning or determining a positioning reference station is performed by the received positioning assistance data.

In a third aspect, the embodiment of the present application provides a communication method, which may be performed by a terminal device, a chip or a chip system in a terminal device, or a device such as a cloud device, where the method includes: the terminal device switches from the source cell to the source device. After the target cell is determined to be different from the positioning reference station of the source cell, the terminal device receives the first positioning assistance data sent by the source cell, and the terminal device is configured according to the first location assistance. The data and the second positioning assistance data are used for positioning, wherein the second positioning assistance data is positioning assistance data sent by the source cell before the source cell is switched to the target cell and saved by the terminal device.

After the terminal device switches from the source cell to the target cell, if the location reference station of the target cell is different from the location reference station of the source cell, the first location system message of the source cell is still received and utilized. The saved second positioning system message is located, so that the positioning service of the terminal device is not interrupted.

In a possible design, the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell; and the terminal device is configured according to the second positioning assistance data and the third positioning assistance data. Performing positioning, the third positioning assistance data is positioning assistance data sent by the target cell that is received by the terminal device after being switched from the source cell to the target cell.

In the above method, if the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the third positioning assistance data received by the terminal device in the target cell may be directly used and utilized. The third positioning system message can continue to be located, so that the positioning service of the terminal device does not interrupt.

In a possible design, when the terminal device determines the positioning reference station of the target cell and the positioning reference station of the source cell, the terminal device first reads the first positioning assistance data; and then according to the first positioning The auxiliary data determines a positioning reference station of the source cell; the terminal device determines a positioning reference station of the target cell according to the third positioning assistance data.

Through the foregoing method, the terminal device can quickly and conveniently determine the positioning reference station of the target cell and the source cell according to the positioning assistance data in the positioning system message.

In a possible design, after the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the terminal device deletes the second positioning system message.

In the above method, the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and deleting the second positioning system message can effectively save storage space.

In a fourth aspect, the embodiment of the present application provides a communication method, which may be performed by a terminal device, a chip or a chip system in a terminal device, or a device such as a cloud device, where the method includes: the terminal device switches from the source cell to the source device. After the target cell, the terminal device stores first positioning assistance data, where the first positioning assistance data is positioning assistance data sent by the source cell before the terminal device switches from the source cell to the target cell; After determining that the positioning reference station of the target cell is different from the positioning reference station of the source cell, the terminal device performs positioning according to the first positioning assistance data.

After the foregoing method is used, the terminal device does not delete the first positioning assistance data, so that after the terminal device is switched from the source cell to the target cell, the terminal device may perform positioning according to the first positioning assistance data, and the positioning service of the terminal device may be ensured. Interrupted.

a possible implementation manner, the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell; and the terminal device performs, according to the first positioning assistance data and the second positioning assistance data. Positioning, the second positioning assistance data is positioning assistance data sent by the target cell that is received by the terminal device after being switched from the source cell to the target cell.

In the above method, when the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the terminal device may use the second positioning assistance data to update the first positioning assistance data to achieve positioning. After the terminal device is switched from the source cell to the target cell, the positioning service is not interrupted.

In a possible implementation, before determining whether the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the terminal device needs to first determine a positioning reference station and the source cell of the target cell. Positioning reference station, the terminal device is preferred to read the first positioning assistance data; and then determining a positioning reference station of the source cell according to the first positioning assistance data; the terminal device determining according to the second positioning assistance data a positioning reference station of the target cell, where the second positioning assistance data is positioning assistance data sent by the target cell that is received by the terminal device after being switched from the source cell to the target cell.

Through the foregoing method, the terminal device can quickly and conveniently determine the positioning reference station of the target cell and the source cell according to the first positioning assistance data and the second positioning assistance data.

According to a possible implementation manner, after the terminal device performs positioning according to the first positioning assistance data, the terminal device may continue to receive the second positioning assistance data, and if the terminal device can perform positioning according to the second positioning assistance data, And performing positioning according to the second positioning assistance data, or stopping positioning according to the first positioning assistance data.

In the above method, the terminal device can perform positioning by using the second positioning assistance data when the positioning is performed according to the second positioning assistance data, so that the positioning service of the terminal device can be highly accurate.

In a possible implementation manner, after the terminal device performs positioning according to the first positioning assistance data, the terminal device deletes the first positioning assistance data.

In a fifth aspect, the embodiment of the present application provides a communication method, which may be performed by a base station, a chip or chip system in a base station, or a device such as a cloud device, where the method includes: the source base station receives an indication sent by the terminal device. a message, the indication message is used to indicate that the terminal device needs to locate auxiliary data, and the source base station sends a handover request to the target base station when determining that the cell needs to be switched, where the handover request includes a request for requesting positioning assistance data. Instructing the source base station to receive the positioning assistance data or the first positioning indication message sent by the target base station, where the first positioning indication message is used to indicate the positioning reference station of the target base station and the positioning reference station of the source base station the same.

When the source base station determines that the terminal device needs to switch the cell, the source base station may first request the positioning assistance data from the target base station, and may ensure that the terminal device acquires the positioning assistance data in advance before switching to the target base station, so that the terminal device is in the After the handover to the target base station, the positioning can be performed, and the positioning service of the terminal device is not interrupted.

In a possible design, after the source base station receives the positioning assistance data sent by the target base station, the source base station sends the positioning assistance data to the terminal device.

In the above method, the terminal device acquires the positioning assistance data in advance before switching to the target base station, so that the terminal device can perform positioning after switching to the target base station, and the positioning service of the terminal device is not interrupted.

In a possible design, after the source base station receives the positioning assistance data sent by the target base station, the source base station determines, before the source base station sends the received positioning assistance data to the terminal device, the source base station determines Positioning the reference station of the target base station; determining that the positioning reference station of the target base station is different from the positioning reference station of the source base station, wherein the positioning reference station of the source base station is the source base station according to the source base station The positioning aid data is determined.

And the source base station may send the positioning assistance data after the positioning reference station of the target base station is different from the positioning reference station of the source base station, so that the terminal device acquires the positioning assistance data in advance, and can Ensure that the terminal device does not interrupt the positioning service after switching the cell.

In a possible design, when determining the positioning reference station of the target base station, the source base station may determine the positioning reference station of the target base station according to the positioning assistance data sent by the target base station.

Through the above method, the source base station can conveniently and quickly determine the positioning reference station of the target base station by reading the positioning assistance data.

In a possible design, when the source base station determines the positioning reference station of the target base station, if the handover request carries the first request information, the first request information is used to request the target base station. Locating the reference station information; the source base station receives the first feedback message sent by the target base station, where the first feedback message includes positioning reference station information of the target base station; and the source base station determines according to the first feedback message A positioning reference station of the target base station.

Through the foregoing method, the source base station can conveniently and quickly determine the positioning reference station of the target base station by sending the first requesting cell.

In a possible design, the indication information includes at least one of the following: a type of positioning assistance data, a GNSS ID, and positioning reference station information of the source base station.

In a possible design, the request indication includes a type of at least one of the following positioning assistance data, the GNSS ID, positioning reference station information of the source base station.

In a possible design, the first positioning indication message includes at least one of the following: a GNSS ID, positioning reference station information of the target base station.

In a sixth aspect, the embodiment of the present application provides a communication method, which may be performed by a base station, a chip or a chip system in a base station, or a device such as a cloud device, where the method includes: the target base station receives the handover sent by the source base station. a request, the handover request includes a request message for requesting positioning assistance data, and the target base station sends positioning assistance data or a first positioning indication message to the source base station, where the first positioning indication message is used to indicate the The positioning reference station of the target base station is the same as the positioning reference station of the source base station.

The target base station can send the positioning assistance data to the source base station in advance, and can ensure that the terminal device acquires the positioning assistance data in advance before switching to the target base station, so that the terminal device can switch to the target base station after being switched to the target base station. For positioning, the positioning service of the terminal device is not interrupted.

In a possible design, before the target base station sends the positioning assistance data to the source base station, the target base station determines a positioning reference station of the source base station according to the request message, where the request indication includes the source Positioning reference station information of the base station; the target base station determines that the positioning reference station of the target base station is different from the positioning reference station of the source base station, wherein the positioning reference station of the target base station is the target base station according to the target base station Positioning assistance data determined.

In the above method, the target base station sends the positioning assistance data to the source base station in advance if the positioning reference station of the target base station is different from the positioning reference station of the source base station, so that the terminal device can be switched to the target. Before the base station, the positioning assistance data is obtained in advance, so that the terminal device can perform positioning after switching to the target base station, and the positioning service of the terminal device is not interrupted.

In a possible design, the target base station first locates an indication message to the source base station, and the target base station determines a positioning reference station of the source base station according to the request message, where the request indication includes the source Positioning reference station information of the base station; when the target base station determines that the positioning reference station of the target base station is the same as the positioning reference station of the source base station, the first positioning indication message is sent to the source base station, where the positioning reference station of the target base station is The target base station is determined according to positioning assistance data of the target base station.

In the above method, the target base station sends the first location indication message when the location reference station of the target base station is the same as the location reference station of the source base station, which ensures that the terminal device does not locate the service after switching the cell. Interrupted.

In a possible design, if the handover request carries the first request information, the first request information is used to request positioning reference station information of the target base station; and the target base station sends the information to the source base station. a first feedback message, where the first feedback message includes positioning reference station information of the target base station.

The target base station may send the positioning reference station information of the target base station to the source base station by using the first feedback message, so that the source base station can conveniently acquire the positioning reference station information of the target base station.

In a seventh aspect, the embodiment of the present application provides a communication method, which may be performed by a terminal device, a chip or a chip system in a terminal device, or a device such as a cloud device, where the method includes: determining, by the terminal device, that positioning is required. And an indication message sent to the source base station, where the indication message is used to indicate that the terminal device needs to locate the auxiliary data; and the terminal device receives the positioning assistance data sent by the source base station.

In the above manner, the terminal device acquires the positioning assistance data in advance before switching to the target base station, so that the terminal device can perform positioning after switching to the target base station, and the positioning service of the terminal device is not interrupted.

In a possible design, after the terminal device receives the positioning assistance data sent by the source base station, the terminal device determines a positioning reference station of the target base station according to the positioning assistance data; the terminal device according to the received The source base station sends the positioning assistance data to determine the positioning reference station of the source base station; and the terminal device determines that the positioning reference station of the target base station is the same as the positioning reference station of the source base station, and deletes the positioning assistance data; otherwise, the storage station Positioning assistance data.

In the above manner, before the handover to the target base station, if the positioning reference station of the target base station is different from the positioning reference station of the source base station, the positioning assistance data is saved in advance, so that the terminal device can perform the handover after switching to the target base station. Positioning, the positioning service of the terminal device is not interrupted.

In an eighth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a terminal, and the beneficial effects can be referred to the description of the first aspect, and details are not described herein again. The device has the function of implementing the behavior in the method examples of the first aspect described above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a selection unit and a processing unit, and the units can perform the corresponding functions in the method example of the first aspect. For details, refer to the detailed description in the method example, which is not described herein.

In a ninth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a terminal, and the beneficial effects can be referred to the description of the first aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, the processor being configured to support the terminal to perform a corresponding function in the method of the first aspect described above. The memory is coupled to the processor, which stores program instructions and data necessary for the terminal, and the communication device further includes a transceiver for communicating with other devices.

In a tenth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a terminal, and the beneficial effects can be referred to the description of the second aspect, and details are not described herein again. The device has the function of implementing the behavior in the method examples of the second aspect described above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a transmission unit and a processing unit, and the units can perform the corresponding functions in the method example of the second aspect. For details, refer to the detailed description in the method example, which is not described herein.

In an eleventh aspect, the embodiment of the present application further provides a communication device, where the device is applied to a terminal, and the beneficial effects can be referred to the description of the second aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, the processor being configured to support the terminal to perform a corresponding function in the method of the second aspect described above. The memory is coupled to the processor, which stores program instructions and data necessary for the terminal, and the communication device further includes a transceiver for communicating with other devices.

In a twelfth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a terminal, and the beneficial effects can be referred to the description of the third aspect, and details are not described herein again. The device has the function of implementing the behavior in the method examples of the third aspect above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a transmission unit and a processing unit, and the units can perform the corresponding functions in the method example of the foregoing third aspect. For details, refer to the detailed description in the method example, which is not described herein.

In a thirteenth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a terminal, and the beneficial effects can be referred to the description of the third aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, the processor being configured to support the terminal to perform a corresponding function in the method of the third aspect described above. The memory is coupled to the processor, which stores program instructions and data necessary for the terminal, and the communication device further includes a transceiver for communicating with other devices.

In a fourteenth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a terminal, and the beneficial effects can be referred to the description of the fourth aspect, and details are not described herein again. The device has the function of implementing the behavior in the method examples of the above fourth aspect. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a transmission unit and a processing unit, and the units can perform the corresponding functions in the method example of the foregoing fourth aspect. For details, refer to the detailed description in the method example, which is not described herein.

In a fifteenth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a terminal, and the beneficial effects can be referred to the description of the fourth aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, the processor being configured to support the terminal to perform a corresponding function in the method of the fourth aspect described above. The memory is coupled to the processor, which stores program instructions and data necessary for the terminal, and the communication device further includes a transceiver for communicating with other devices.

In a sixteenth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a base station, and the beneficial effects can be referred to the description of the fifth aspect, and details are not described herein again. The device has the function of implementing the behavior in the method example of the above fifth aspect. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a transmission unit and a processing unit, and the units can perform the corresponding functions in the method example of the foregoing fifth aspect. For details, refer to the detailed description in the method example, which is not described herein.

In a seventeenth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a base station, and the beneficial effects can be referred to the description of the fifth aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to perform a corresponding function in the method of the above fifth aspect. The memory is coupled to the processor, which stores program instructions and data necessary for the terminal. The communication device also includes a communication interface for communicating with other devices.

In an eighteenth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a base station, and the beneficial effects can be referred to the description of the sixth aspect, and details are not described herein again. The device has the function of implementing the behavior in the method example of the sixth aspect above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a transmission unit and a processing unit, and the units can perform the corresponding functions in the method example of the sixth aspect. For details, refer to the detailed description in the method example, which is not described herein.

In a nineteenth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a base station, and the beneficial effects can be referred to the description of the sixth aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, the processor being configured to support the terminal to perform a corresponding function in the method of the sixth aspect described above. The memory is coupled to the processor, which stores program instructions and data necessary for the terminal. The communication device also includes a communication interface for communicating with other devices.

In a twentieth aspect, the embodiment of the present application further provides a communication device, where the device is applied to a terminal, and the beneficial effects can be referred to the description of the seventh aspect, and details are not described herein again. The device has the function of implementing the behavior in the method example of the seventh aspect described above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above. In a possible design, the structure of the device includes a transmission unit and a processing unit, and the units can perform the corresponding functions in the method example of the foregoing seventh aspect. For details, refer to the detailed description in the method example, which is not described herein.

In a twenty-first aspect, the embodiment of the present application further provides a communication device, where the device is applied to a terminal, and the beneficial effects can be referred to the description of the seventh aspect, and details are not described herein again. The structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to perform a corresponding function in the method of the above seventh aspect. The memory is coupled to the processor, which stores program instructions and data necessary for the terminal, and the communication device further includes a transceiver for communicating with other devices.

In a twenty-second aspect, the embodiment of the present application further provides a computer readable storage medium, including program instructions, when executed on a computer, causing the computer to perform any of the above aspects or any of the above aspects. .

In a twenty-third aspect, the embodiment of the present application further provides a computer chip, where the chip is connected to a memory, and is configured to read and execute a software program stored in the memory, so that the computer performs any of the above aspects or the foregoing Any of the aspects provided by the design.

DRAWINGS

FIG. 1 is a schematic diagram of a network architecture provided by the present application;

2 is a schematic diagram of a network architecture provided by the present application;

FIG. 3 is a schematic diagram of a communication method provided by the present application; FIG.

4A is a schematic diagram of a communication method provided by the present application;

4B is a schematic diagram of a communication method provided by the present application;

4C is a schematic diagram of a communication method provided by the present application;

FIG. 5 is a schematic diagram of a communication method provided by the present application; FIG.

6 to 11 are schematic structural diagrams of a communication device provided by the present application.

detailed description

First, some of the terms used in the present application are explained so as to be understood by those skilled in the art.

1. Positioning system message, data required by the user equipment during positioning, wherein the positioning system message includes positioning assistance data, satellite information, reference station information, reference time information, and the like.

2. Positioning auxiliary data, the data required by the user equipment for positioning, and the positioning assistance data required for different positioning methods are different. The user equipment can perform positioning calculation using the positioning assistance data.

3. A source cell and a target cell, where the source cell is a serving cell or a camping cell in which the terminal device currently resides; the target cell is a cell to which the terminal device needs to be handed over when performing cell reselection, and the target cell may be the The neighboring cell of the source cell.

4. Positioning the reference station, the positioning system message broadcasted by the cell is received from a positioning reference station, the positioning reference station may indicate the source of the positioning system message broadcast by the cell, and the positioning reference station of the cell indicates the positioning system message broadcast by the cell. Source: The cell is not limited to the source cell and the target cell; the positioning reference station of the base station identifies the source of the positioning system message broadcast by the base station, and the base station is not limited to the source base station and the target base station.

5. The positioning offset is related to whether the cell supports the positioning service, and the value used to represent the positioning service quality of the cell may be set according to a specific scenario. For example, the positioning offset of the cell supporting the positioning service is greater than zero. A positive number, the positioning offset of the cell that does not support the positioning service is zero.

The R value is determined by the positioning offset according to whether the cell supports the positioning service according to the positioning offset. The R value of a cell is determined according to the positioning offset of the cell, and the cell is not limited. Source cell, target cell.

The candidate cell set is a set including at least one candidate cell, and the cell in the candidate cell may be a positioning service or may not support a positioning service, and the candidate cell set may be the source cell. The neighboring cell, that is, the candidate cell may be a neighboring cell.

8. In the idle state and the connected state, when the terminal device is in the idle state, the terminal device does not establish a connection with the base station; when the terminal device is in the connected state, the terminal device establishes a connection with the base station, and can receive the information sent by the base station.

9, multiple, refers to two or more.

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, a schematic diagram of a possible network architecture applicable to the present application is shown. The network architecture is a 4G network architecture. The network element in the 4G architecture includes a terminal device. In FIG. 1, the terminal device is a user equipment (UE). The network architecture also includes an MME, a serving GPRS support node (SGSN), an HSS, a serving gateway (S-GW), a packet data network gateway (PDN gateway, P-GW), Policy and charging rules function (PCRF) entity, evolved universal terrestrial radio access network (E-TURAN) enhanced service mobile location center (evolved serving mobile location center) , E-SMLC), gateway mobile location center (GMLC), and the like.

It should be noted that the UEs in the embodiments of the present application are all devices including a mobile device (ME) and a security module, where the security module may be a universal integrated circuit card (UICC). It can also be a secure storage unit integrated in the ME. The UICC includes a Universal Subscriber Identity Module (USIM).

The E-UTRAN is composed of a plurality of evolved base stations (eNodeBs), and the eNodeBs are interconnected by an X2 interface. The eNodeB and the evolved packet core (EPC) exchange through the S1 interface, and the eNodeB and the UE Through long term evolution (LTE)-Uu interconnection.

The main function of the MME is to support NAS signaling and its security, management of the track area (TA) list, selection of P-GW and S-GW, MME selection when switching across MMEs, and connection to 2G/3G. In the system switching process, the SGSN is selected, the user's authentication, roaming control, and bearer management, and mobility management between the core network nodes of different access networks of the 3rd generation partnership project (3GPP).

The S-GW is a gateway terminated on the E-UTRAN interface. Its main functions include: acting as a local anchor point when performing inter-base station handover, and assisting in completing the reordering function of the base station; as a mobile when switching between 3GPP different access systems Sexual anchor; perform lawful interception; perform routing and forwarding of data packets; perform packet marking at the upstream and downstream transport layers; and be used for inter-operator billing.

The P-GW is a gateway that terminates the PDN to the SGi interface. If the UE accesses multiple PDNs, the UE will correspond to one or more P-GWs. The main functions of the P-GW include a packet filtering function based on the user, a lawful interception function, an internet protocol (IP) address allocation function between the UEs, and a packet transmission level flag in the uplink. Perform uplink and downlink service level charging and service level threshold control, and perform service-based uplink and downlink rate control.

The HSS is a database for storing user subscription information, and the home network may include one or more HSSs. The HSS is responsible for storing information related to the user, such as user identification, numbering and routing information, security information, location information, profile information, and the like.

The E-SMLC is used to support multiple positioning services of the user, and can also provide positioning assistance data for the user to transmit the positioning assistance data to the user.

The GMLC is the first node of the public land mobile network (PLMN) for the external location program to access the global system for mobile communication (GSM), which performs the registration authorization check and the home location register (home) Location register, HLR) Request routing information. A PLMN may have multiple GMLCs.

E-SMLC and GMLC can be used as servers to improve the scheduling information of positioning system messages or positioning system messages.

The external location service client (Extemal LCS Client) is an external node that can trigger positioning.

Among the architectures shown in FIG. 1 , the network elements related to the present application are mainly: UE, E-UTRAN, E-SMLC, and GMLC.

Referring to FIG. 2, another possible network architecture diagram applicable to the present application is shown. The network architecture is a 5G network architecture. The network element in the 5G architecture includes a terminal device. In FIG. 2, the terminal device is a UE. The network architecture also includes a radio access network (RAN), an AMF entity, a session management function (SMF), a user plane function (UPF), a UDM, an AUSF, and an ARPF (in FIG. 2). Not shown), SEAF (not shown in FIG. 2), data network (DN), E-SMLC (not shown in FIG. 2), GMLC (not shown in FIG. 2), and the like.

The main function of the RAN is to control the user's access to the mobile communication network through wireless. The RAN is part of a mobile communication system. It implements a wireless access technology. Conceptually, it resides between devices (such as a mobile phone, a computer, or any remote controller) and provides connectivity to its core network. RAN devices include, but are not limited to, (g nodeB, gNB), eNodeB, radio network controller (RNC), node B (NB), base station controller (BSC) in 5G. Base transceiver station (BTS), home base station (for example, home evolved node B, or home node B, HNB), baseband unit (BBU), transmission and receiving point (TRP), transmission A point of convergence (TP), a mobile switching center, etc., and may also include a wireless fidelity (wifi) access point (AP) or the like.

The AMF entity is responsible for the access management and mobility management of the terminal. In practical applications, it includes the mobility management function in the MME in the network framework of LTE, and adds the access management function.

The SMF entity is responsible for session management, such as user session establishment.

The UPF entity is a functional network element of the user plane, and is mainly responsible for connecting to an external network, and includes related functions of an LTE serving gateway (SGW) and a public data network gateWay (PDN-GW).

The DN is responsible for providing services to the terminal. For example, some DNs provide Internet access for terminals, and other DNs provide SMS functions for terminals. The SEAF entity is used to complete the authentication process for the UE. In 5G, the functions of the SEAF can be incorporated into the AMF entity.

The AUSF entity has an authentication service function for terminating the authentication function of the SEAF request. The AMF network element is responsible for access management and mobility management of the terminal. In practical applications, it includes the mobility management function of the MME in LTE, and joins the access management function.

The ARPF entity has an authentication credential storage and processing function for storing a user's long-term authentication credential, such as a permanent key K. In 5G, the functionality of ARPF can be incorporated into UDM entities.

The UDM entity can store the subscriber's subscription information, implementing a backend similar to the HSS in 4G.

The E-SMLC is used to support multiple positioning services for users, and can also provide auxiliary data for users to transmit auxiliary data to users.

The GMLC accesses the first node of the GSM PLMN for the external location procedure, which performs registration authorization checks and requests routing information from the HLR. A PLMN may have multiple GMLCs.

E-SMLC and GMLC can be connected to AMF, UPF, and SMF, and can be used as a server to improve positioning information of positioning system messages or positioning system messages.

The terminal device in the present application is a device with wireless transceiving function, which can be deployed on land, including indoor or outdoor, handheld or on-board; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air ( Such as airplanes, balloons and satellites, etc.). The terminal device may be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, industrial control (industrial control) Wireless terminal, wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transport safety Wireless terminals in smart cities, wireless terminals in smart homes, and so on.

Among the architectures shown in FIG. 2, the network elements related to the present application are mainly: UE, RAN, E-SMLC, and GMLC.

This application applies to both the 4G network architecture shown in Figure 1 and the 5G network architecture shown in Figure 2.

The present application provides a method and a device for acquiring a system message, which are used to solve the problem that the existing system message acquisition method in the prior art is less flexible. The method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.

As shown in FIG. 3, a terminal device is taken as an example to describe a communication method according to an embodiment of the present invention, but the embodiment of the present invention is not limited to the application to the other types of devices. The specific process of the method may include:

Step 301: When the terminal device is ready to perform cell reselection, select one candidate cell from the candidate cell set as the target cell.

Step 302: The terminal device reselects from the source cell to the target cell, where the target cell is a cell that supports a positioning service.

The candidate cell set includes a candidate cell that supports a positioning service, where the source cell is a cell that the terminal device camps before the cell reselection.

Specifically, when determining the target cell, the terminal device may select a candidate cell with a priority higher than the priority of the source cell, and may also select an R value that is not lower than the R value of the source cell. The following describes the two ways of cell reselection.

The first type, the priority of the target cell is not lower than the priority of the source cell.

Determining, by the terminal device, a priority of the source cell and each candidate cell;

The terminal device determines a candidate cell whose priority is not lower than the priority of the source cell, and selects one candidate cell as the target cell from the candidate cells whose priority is not lower than the priority of the source cell.

In a possible implementation manner, the terminal device may select a candidate cell with the highest priority as the target cell.

The priority of a cell is related to whether the cell supports the positioning service, and the priority of the cell supporting the positioning service is higher than the priority of the cell not supporting the positioning service.

There are many ways to set priorities. Here are a few of them:

In the first manner, when the terminal device determines that the candidate cell supports the location service, the priority of the candidate cell is directly set to the highest priority. Specifically, when the terminal device supports or needs to locate the service, the cell or the frequency point supporting the positioning service or the broadcast positioning service may be regarded as having the highest priority, and then the cell reselection is performed according to the priority-based cell reselection rule. When the terminal device does not need the positioning service or the positioning assistance data that needs to be broadcast, the highest priority setting may be removed, and the reselection according to the normal cell or frequency point may also be considered as the lower priority cell or frequency point. And re-elect.

In the second mode, when the terminal device determines that the candidate cell supports the location service, the terminal is set to a priority, and the priority is set to be higher than the source cell. Specifically, when setting the priority of the candidate cell, the setting may be performed according to the signal quality of the candidate cell, and only if the candidate cell supports the positioning service, the priority is higher than the source cell.

Mode 3: The system broadcast or unicast of the cell may carry the priority of the cell (for example, the priority of the source cell and the priority of the candidate cell), for example, the system broadcast of the terminal device from the source cell or the RRC of the base station unicast The priority of the source cell and the priority of the candidate cell obtained by the message or the LTE positioning protocol (LPP) message sent by the server, in the third mode, the priority of the cell may be determined by the server or the base station, For example, for any cell, if a cell supports a location service, the server directly sets the priority of the cell to the highest; after receiving the priority of the source cell and the priority of the candidate cell, the terminal device The priorities of the cells are sorted, and the cell with the highest priority is selected as the target cell. That is, when the priority information is sent to the terminal, the cell or the frequency point supporting the positioning service may be set to the highest priority and sent to the terminal, and the support may be sent to the terminal according to whether the positioning service is set to the priority.

Specifically, the serving cell or the source cell may broadcast or unicast a frequency point or a cell supporting the positioning service to the terminal device.

In addition, the priority configuration can also be the default configuration.

For a terminal device that does not support the positioning service, if it can receive the highest priority configuration of the highest positioning serving cell, the cell reselection is performed according to the highest priority configuration. If not, follow the low priority or follow the normal cell reselection rules.

For a terminal device that does not support the positioning service, the cell or frequency point supporting the positioning service may also be considered as the lowest priority. For example, in some cases, such as a specific cell or frequency.

A cell supporting the location service in this application may be understood as a cell supporting a broadcast location service or a cell broadcasting positioning assistance data. A terminal device supporting a positioning service can be understood as a terminal device that needs to locate auxiliary data or a terminal device that has positioning capability.

The cell in this application is a cell entity that the terminal device can camp on or serve, and may also be a frequency point. That is, the priority information or the offset amount may be a cell level or a frequency level.

The source cell in this application can be understood as a cell reselection or a cell before handover, such as a serving cell. The target cell is a cell that is reselected or switched.

The foregoing manner is only an example. When setting a priority, it can be ensured that the priority of the cell supporting the positioning service is higher than the priority of the cell not supporting the positioning service is applicable to the embodiment of the present invention.

It should be noted that the terminal device determines that the candidate cell supports the location service. For example, the terminal device can receive the system message generated by the candidate cell, and when it is determined that the location system message is included, or the location assistance data is included, The candidate cell supports the location service; for example, the source cell may carry the cell information (such as the cell identifier) of the cell supporting the location service in the system broadcast or the unicast, and the terminal device receives the cell information of the cell that supports the location service sent by the source cell, A cell supporting the location service can be determined.

The second type, the target cell is a candidate cell whose R value is not lower than the source cell, wherein the target cell includes a candidate cell whose R value is higher than the source cell, or the target cell has an R value equal to the source cell. Candidate cell). Or performing cell reselection based on cell ranking cell-ranking criteria.

The terminal device first determines the R values of the source cell and each candidate cell by using the positioning offset of the source cell and each candidate cell, respectively.

The terminal device performs cell reselection according to a cell ranking criterion. Specifically, for a cell supporting the positioning service, the cell reselection may be performed by using a positioning offset amount or a compensation value. That is, when the R value is calculated according to the R criterion, the positioning offset amount is used to calculate or determine the R value of each cell.

Specifically, for all cells supporting the positioning service, whether it is a source cell or a candidate cell, the positioning offset amount may be used to calculate the R value, and finally the cell with the highest cell ranking, that is, the cell with the highest R value is selected.

In a possible implementation manner, a positioning offset of a cell may be sent in a system broadcast or a unicast of a cell, for example, a RRC message sent by the terminal device from a system broadcast of a source cell or a unicast by a base station, or a unicast LPP message sent by a server. The positioning offset of the source cell obtained in the medium; the terminal device can be more easily reselected to the cell supporting the positioning service.

Specifically, the confirmation of the R value of the source cell and the candidate cell needs to meet certain formula requirements. The following four types are listed. In the following four modes, Offsetpos is used to indicate the positioning offset of the cell, and in actual applications, Other names are not limited in this application.

First, the R value of the source cell meets the following formula:

Rs=Qmeas,s+QHyst-Qoffsettemp+offsetpos

Wherein, Qmeas, s is a reference signal received power RSRP measurement value of the source cell, QHyst is a hysteresis amount of the source cell, Qoffsettemp is a temporary compensation value of the source cell, and Offsetpos is a positioning offset of the source cell. the amount;

Rn=Qmeas,n-Qoffset-Qoffsettemp+offsetpos

Where Qmeas, n is the RSRP measurement value of the candidate cell, Qoffset is the offset of the candidate cell, Qoffsettemp represents the temporary compensation value for the candidate cell, and Offsetpos is the positioning offset of the candidate cell.

A possible implementation manner: only the cell supporting the positioning service uses the positioning offset amount to perform the R value calculation.

Optionally, in the first mode, the positioning offset of the cell supporting the positioning service may be greater than the positioning offset of the cell not supporting the positioning service, where the positioning offset may be one of the server settings of the cell. The default value is carried in the broadcasted information when broadcasting the positioning system message or broadcasting the positioning assistance data.

In a possible implementation manner, the cell positioning offset amount of the positioning service is positive, and the cell positioning offset amount is not zero for the positioning service, or the positioning offset is not set.

Second, the R value of the source cell meets the following formula:

Rs=Qmeas,s+QHyst-Qoffsettemp-offsetpos

Wherein, Qmeas, s is an RSRP measurement value of the source cell, QHyst is a hysteresis amount of the source cell, Qoffsettemp is a temporary compensation value of the source cell, and Offsetpos is a positioning offset amount of the source cell;

Rn=Qmeas,n-Qoffset-Qoffsettemp-offsetpos

A possible implementation manner, all cells that do not support the positioning service use the positioning offset amount to perform R value calculation.

Optionally, in the second mode, the positioning offset of the cell supporting the positioning service may be smaller than the positioning offset of the cell not supporting the positioning service, where the positioning offset may be one of the server settings of the cell. The default value is carried in the broadcasted information when broadcasting the positioning system message or broadcasting the positioning assistance data.

In a possible implementation manner, the cell positioning offset amount supporting the non-location service is a positive number, the cell positioning offset amount supporting the positioning service is zero, or the positioning offset amount is not set.

Third, the R value of the source cell meets the following formula requirements:

Rs=Qmeas,s+QHyst-Qoffsettemp

The Qmeas, s is the reference signal received power RSRP measurement value QHyst of the source cell is the hysteresis amount of the source cell, and Qoffsettemp is the temporary compensation value of the source cell. Where Qoffsettemp=offset1+offsetpos, Offsetpos is the positioning offset of the source cell.

Rn=Qmeas,n-Qoffset-Qoffsettemp

Where Qmeas, n is the RSRP measurement value of the candidate cell, and Qoffset is the offset of the candidate cell.

Qoffset=Qoffset1+offsetposi, Offsetposi is a positioning offset amount of the candidate cell; Qoffsettemp represents a temporary compensation value for the candidate cell.

The above is only an example. The positioning offset amount or the compensation value may be added by adding an offset amount or a compensation value to one of the above-mentioned calculation formulas.

Optionally, in the third mode, the positioning offset of the cell supporting the positioning service may be smaller than the positioning offset of the cell not supporting the positioning service, where the positioning offset may be one of the server settings of the cell. The default value is carried in the broadcasted information when broadcasting the positioning system message or broadcasting the positioning assistance data.

In a possible implementation manner, the cell positioning offset amount supporting the non-location service is a positive number, the cell positioning offset amount supporting the positioning service may be zero, or the positioning offset amount may not be set.

Fourth, the R value of the source cell meets the following formula requirements:

Rs=Qmeas,s+QHyst-Qoffsettemp

Where Qmeas, s is the RSRP measurement value of the source cell, and QHyst is QHystt=Qoffset1-offsetposi. Offsetposi is a positioning offset of the source cell; Qoffsettemp is a temporary compensation value of the source cell.

Rn=Qmeas,n-Qoffset-Qoffsettemp

Where Qmeas, n is the RSRP measurement value of the candidate cell, Qoffset is the offset of the candidate cell, Qoffset=Qoffset1-offsetposi, Offsetposi is the positioning offset of the candidate cell; Qoffsettemp indicates the candidate The temporary compensation value of the cell.

The above is only an example. The positioning offset amount or the compensation value may be represented by subtracting an offset amount or a compensation value from one of the above calculation formulas.

Optionally, in the fourth mode, the positioning offset of the cell supporting the positioning service may be greater than the positioning offset of the cell not supporting the positioning service, where the positioning offset may be one of the server settings of the cell. The default value is carried in the broadcasted information when broadcasting the positioning system message or broadcasting the positioning assistance data.

In a possible implementation manner, the cell positioning offset amount of the positioning service may be a positive number, and the cell positioning offset amount may not be zero or the positioning offset amount may not be set.

When determining the R value of the source cell and the candidate cell, any one of the foregoing manners may be adopted, or a combination of the foregoing multiple manners may be adopted. For example, for the candidate cell supporting the positioning service, the first mode may be adopted. The candidate cell supporting the positioning service adopts the second mode; the fourth mode is adopted for the candidate cell supporting the positioning service, and the third mode is adopted for the candidate cell not supporting the positioning service.

It should be noted that the positioning offset can be a default value. For example, the setting of the positioning service is the same value. For the cell that does not support the positioning service, the positioning offset cannot be set, or the positioning offset is set to If the cell is in the system broadcast or unicast, the default positioning offset may be carried in the sent message, and the terminal device obtains the positioning offset in the message sent by the bear, when the terminal device is calculating If the cell supports the location service, if the cell supports the location service, the R value is determined according to the location offset. If the cell does not support the location service, the cell may be sorted according to the existing cell. The criteria calculate the R value.

It should be understood that there are many ways to calculate the R value. The embodiment of the present application does not limit the manner in which the R value is calculated. The R value of the cell supporting the positioning service is greater than the calculated R value of the R value that does not support the positioning service. The modes are all applicable to the embodiments of the present invention.

When the terminal device is ready to perform cell reselection in the source cell, the selected target cell is a cell supporting the positioning service, so that the terminal device can still perform positioning after cell reselection.

Regardless of the method of cell reselection in the prior art or the manner provided by the embodiment of the present application, after the cell reselection, the terminal device needs to receive the positioning system message if the positioning needs to be performed, and only the information of the received positioning system message is sufficient. And when a high-precision solution is obtained, the terminal device can perform high-precision positioning according to the received positioning system message. However, after the cell reselection, the terminal device cannot perform the positioning, and the positioning service of the terminal device is interrupted, before the information of the received positioning system message is insufficient and the high-precision solution is not obtained.

The embodiment of the present application provides a method for locating a terminal device that is interrupted after cell reselection in the prior art.

As shown in FIG. 4A, a communication method provided by an embodiment of the present application includes:

Step 401: The terminal device receives the first positioning assistance data before the source cell reselects to the target cell.

Step 402: The terminal device receives the second positioning assistance data after the source cell is reselected to the target cell.

Step 403: The terminal device performs positioning according to the first positioning assistance data and the second positioning assistance data.

The first positioning assistance data is positioning assistance data sent by the terminal device from the source cell to the target cell before the target cell is reselected, and the second positioning assistance data is that the terminal device is from the terminal device. The source cell reselects the positioning assistance data sent by the target cell after the target cell.

As shown in FIG. 4A, the terminal device receives the first positioning assistance data sent by the target cell before the cell reselection, and after the cell reselection, receives the second positioning message sent by the target cell; the terminal device may Continuously receiving data, and then performing uninterrupted positioning, can ensure that the positioning service will not be interrupted.

Specifically, before the terminal device performs positioning according to the first positioning assistance data and the second positioning assistance data, the terminal device may first determine a positioning reference station of the target cell and a positioning reference station of the source cell. If the terminal device determines that the positioning reference station of the target cell is different from the positioning reference station of the source cell, performing positioning according to the first positioning assistance data and the second positioning assistance data; the terminal device It is also possible to determine whether the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and directly perform positioning according to the first positioning assistance data and the second positioning assistance data.

It should be noted that, the determining, by the terminal device, whether the positioning reference station of the target cell is the same as the positioning reference station of the source cell is only required to be based on the first positioning assistance data and the second positioning by the terminal device Before the auxiliary data is located, the terminal device determines whether the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and the terminal device may switch from the source cell to the target cell. The foregoing process may be performed after the terminal device is switched from the source cell to the target cell, which is not limited herein.

The positioning reference station of the target cell is different from the positioning reference station of the source cell, indicating that the positioning assistance data sent by the target cell and the source cell does not come from the same positioning reference station, and after the terminal device reselects to the target cell, Receiving, by the terminal device, the second positioning assistance data that is sent by the target cell, the third positioning assistance data that is sent by the source cell that is received before the cell reselection of the terminal device cannot be updated, and the terminal device cannot be in the received source cell. Based on the sent third positioning assistance data, the positioning is performed by using the second positioning assistance data sent by the target cell; before the cell reselection, the terminal device starts to receive the first positioning assistance data sent by the target cell, so that the terminal device After cell reselection, positioning can be performed based on first positioning assistance data and second positioning assistance data from one positioning reference station.

In a possible implementation, the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell; the terminal device may be configured according to the second positioning assistance data and the third positioning assistance. The data is located, wherein the third positioning assistance data is positioning assistance data that is sent by the source cell and is sent by the source cell before the terminal device switches to the target cell.

The terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and indicates that the positioning assistance data sent by the target cell and the source cell are from the same positioning reference station, and the terminal device can save the previous positioning reference station. The third positioning assistance data sent by the received source cell is used for positioning by using the second positioning assistance data sent by the target cell, based on the saved positioning assistance data sent by the received source cell.

In a possible implementation, the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and the terminal device may not use the first positioning assistance data when performing positioning. The first positioning assistance data may be deleted to save storage space.

Specifically, before determining whether the positioning reference station of the target cell and the positioning reference station of the source cell are the same, the terminal device needs to determine a positioning reference station of the target cell and a positioning reference station of the source cell:

The terminal device reads the first positioning assistance data;

Determining, by the terminal device, a positioning reference station of the target cell according to the first positioning assistance data;

The terminal device determines a positioning reference station of the source cell according to the third positioning assistance data.

The positioning assistance data carries the reference station information, for example, the positioning reference station identifier (such as an ID), and the terminal device may determine the first positioning assistance data by reading the positioning assistance data included in the first positioning assistance data. The reference station ID1 carried in the terminal device, the terminal device may determine the reference station ID2 carried in the third positioning assistance data by using the saved third positioning assistance data sent by the source cell; if the reference station ID1 and the reference station If the ID2 is the same, the positioning reference station of the target cell is the same as the positioning reference station of the source cell. Otherwise, the positioning reference station of the target cell is different from the positioning reference station of the source cell.

It should be noted that, before the terminal device is switched from the source cell to the target cell, the terminal device may determine the location of the source cell according to the positioning assistance data sent by the source cell that has been received and saved. a reference station, after the terminal device switches from the source cell to the target cell, the terminal needs to determine a positioning reference station of the source cell, and the terminal device switches from the source cell to the target After the cell, the positioning assistance data sent by the source cell before the source cell is switched to the target cell is saved, and the location of the source cell is determined according to the positioning assistance data included in the positioning assistance data sent by the source cell. If the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the terminal device may delete the third positioning assistance data to save storage space, or may not delete.

Receiving, by the terminal device, the first positioning assistance data sent by the target cell, before the cell reselection, the terminal device may read the first positioning assistance data and determine the target cell before the cell reselection Positioning the reference station, and then the terminal device determines whether the positioning reference station of the target cell is the same as the positioning reference station of the source cell; the terminal device may also read the first after the cell reselection The positioning assistance data or the second positioning assistance data is used to determine a positioning reference station of the target cell, and then the terminal device determines whether the positioning reference station of the target cell is the same as the positioning reference station of the source cell.

In a possible implementation manner, the terminal device reads the first positioning assistance data if it is determined that the target cell meets a certain condition before performing cell reselection.

Specifically, the terminal device determines that the target cell meets part or all of the following conditions, the terminal device reads the first positioning assistance data, and determines a positioning reference of the target cell according to the first positioning assistance data. station.

Condition 1: The signal quality of the target cell is greater than a set threshold; indicating that the signal quality of the target cell is good, and the terminal device is likely to be reselected into the target cell when performing cell reselection.

Condition 2: The priority of the target cell is higher than the priority of the source cell; the priority of the target cell is high, and the terminal device has a greater possibility of reselection when performing cell reselection. In the target cell, the terminal device may read the first system message in advance, where the priority of the condition 2 may be the priority of the cell set in the prior art, or may be as shown in FIG. The priority involved in the embodiment.

Condition 3: The R value of the target cell is higher than the R value of the source cell, indicating that the R value of the target cell is large, wherein the R value involved in the condition 3 may be a cell in the prior art. The R value may also be the R value involved in the embodiment as described in FIG. Or the R value sorts the first few cells.

Condition 4: The target cell supports a positioning service; the target cell supports a positioning service, and indicates that if the terminal device reselects to the target cell when the cell is reselected, the positioning can still be performed.

The embodiment of the present application provides a method for locating a terminal device service service interruption after cell reselection in the prior art.

Briefly, the positioning assistance data of the cell is obtained from the neighboring cell or the candidate cell before the terminal device performs cell reselection or handover, and the data is determined to be from the same reference station according to the reference station information in the positioning assistance data, if it is the same For the reference station, the terminal device may only maintain the positioning assistance data of the source cell or the current cell, and after the cell is reselected or switched to the target cell (the same reference station), the positioning assistance data previously received from the source cell may be used and received from the new cell. The positioning assistance data is continuously positioned, for example, to update the old data type with the new data type received. If the discovery is not the same reference station, the terminal device may continue to receive the positioning assistance data of the target cell while saving the positioning assistance data of the serving cell, and may use the previously received target cell and the handover after the terminal cell is reselected or switched to the target cell. The positioning assistance data received from the target cell is then located, and the saving service is not interrupted.

The locating assistance data of the present application can be obtained by means of broadcast by the base station or by unicast, and the unicast is unicast by the positioning server to the terminal device.

As shown in FIG. 4B, a communication method provided by an embodiment of the present application includes:

Step 401: After the terminal device is switched from the source cell to the target cell, after determining that the positioning reference station of the target cell is different from the positioning reference station of the source cell, the terminal device receives the first positioning assistance data sent by the source cell.

Step 402: The terminal device performs positioning according to the first positioning assistance data and the second positioning assistance data, where the second positioning assistance data is saved by the terminal device, and is switched from the source cell to the The positioning assistance data sent by the source cell before the target cell.

As shown in FIG. 4B, after the cell handover, the terminal device still receives the first positioning assistance data sent by the source cell, so that the total amount of positioning assistance data sent by the terminal device in the received target cell is insufficient and not obtained. When the high-precision positioning is not performed before the high-precision solution, the terminal device can still perform positioning according to the first positioning assistance data and the second system message, and the positioning service of the terminal device can be ensured. Will not be interrupted.

For a description of the positioning reference station of the target cell and the positioning reference station of the source cell, refer to the embodiment shown in FIG. 4A, and details are not described herein again.

a possible implementation manner, the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and the terminal device performs the second positioning assistance data and the third positioning assistance data according to the second positioning assistance data. Positioning, the third positioning assistance data is positioning assistance data sent by the target cell that is received by the terminal device after being switched from the source cell to the target cell.

The terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and indicates that the positioning assistance data sent by the target cell and the source cell are from the same positioning reference station, and the source device can save the source. On the basis of the second positioning assistance data sent by the cell, the positioning is performed by the received third positioning assistance data sent by the target cell, and the positioning is performed according to the third positioning assistance data. The first positioning assistance data sent by the source cell may not be received.

In a possible implementation manner, the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and the terminal device may perform the positioning without using the second positioning assistance data. The second positioning assistance data can be deleted to save storage space.

The terminal device reads the first positioning assistance data; and determines a positioning reference station of the source cell according to the first positioning assistance data;

The terminal device determines a positioning reference station of the target cell according to the third positioning assistance data.

The positioning assistance data carries the reference station information, and the positioning reference station of the corresponding cell, for example, the reference station ID, may be determined according to the reference station information, and the terminal device may determine, by reading the first positioning assistance data, The reference station ID1 carried in the first positioning assistance data, the terminal device may determine that the third positioning assistance data sent by the target cell is carried in the third positioning assistance data received by the terminal device after the cell reselection Reference station ID2; if the reference station ID1 is the same as the reference station ID2, it indicates that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, otherwise, the positioning reference station of the target cell and the source The location reference station of the cell is different.

It should be noted that, in the embodiment shown in FIG. 4A to FIG. 4B, the terminal device may be in an idle state or in a connected state, which is not limited in this application.

As shown in FIG. 4C, a communication method provided by an embodiment of the present application includes:

Step 401: After the terminal device switches from the source cell to the target cell, the terminal device saves first positioning assistance data, where the first positioning assistance data is before the terminal device switches from the source cell to the target cell. The positioning assistance data sent by the source cell.

Step 402: After determining that the positioning reference station of the target cell is different from the positioning reference station of the source cell, the terminal device performs positioning according to the first positioning assistance data.

After the terminal device is switched from the source cell to the target cell, the first positioning assistance data is not deleted, but the first positioning assistance data is saved first, and the first positioning assistance data is used for positioning, thereby ensuring that the positioning service of the terminal device is not An interruption occurred.

When the terminal device determines that the positioning reference station of the target cell is different from the positioning reference station of the source cell, the terminal device may not perform high-precision positioning before the received positioning assistance data sent by the target cell is not yet The terminal device may first perform positioning according to the first positioning assistance data, and continuously receive positioning assistance data generated by the target cell, until the received positioning assistance data sent by the target cell can be used for high-precision positioning. The terminal device performs positioning according to the positioning assistance data received by the target cell.

Determining, by the terminal device, that the positioning reference station of the target cell is the same as the positioning reference station of the source cell; indicating that the positioning assistance data generated by the source cell and the positioning assistance data sent by the target cell are from the same reference station, the terminal The second positioning assistance data received by the device may update the previously saved first positioning assistance data, and the terminal device performs positioning according to the first positioning assistance data and the second positioning assistance data.

The terminal device determines a positioning reference station of the target cell according to the second positioning assistance data.

The positioning assistance data carries the reference station information, and the positioning reference station of the corresponding cell, for example, the reference station ID, may be determined according to the reference station information, and the terminal device may determine, by reading the first positioning assistance data, The reference station ID1 carried in the first positioning assistance data, the terminal device may determine that the second positioning assistance data sent by the target cell is carried in the second positioning assistance data received by the terminal device after the cell reselection Reference station ID2; if the reference station ID1 is the same as the reference station ID2, it indicates that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, otherwise, the positioning reference station of the target cell and the source The location reference station of the cell is different.

After the terminal device performs positioning according to the first positioning assistance data, if the positioning assistance data sent by the target cell received by the terminal device can perform high-precision positioning, the terminal device may delete the first positioning assistance. Data to save storage space.

In the embodiment shown in FIG. 4A to FIG. 4B above, the positioning assistance data (not limited to the first positioning assistance data, the second positioning assistance data, and the third positioning assistance data) may be cell unicast or broadcast. The specific unicast may be sent to the terminal by the positioning server or sent by the base station to the terminal. The broadcast may be a positioning system message broadcasted by the system for the base station.

For example, in the embodiment shown in FIG. 4A, the first positioning assistance data and the second positioning assistance data are unicast or broadcasted by the target cell, and the third positioning assistance data is the source. The cell is unicast or broadcast. In the embodiment shown in FIG. 4B, the first positioning assistance data and the second positioning assistance data are unicast or broadcasted by the source cell, and the third positioning assistance data is the target cell list. Broadcast or broadcast. In the embodiment shown in FIG. 4C, the first positioning assistance data is unicast or broadcasted by the source cell, and the second positioning assistance data is unicast or broadcast by the target cell.

For the embodiment shown in FIG. 4A to FIG. 4B, after the terminal device performs cell reselection or handover to the target cell, the terminal device needs to save the positioning assistance data obtained from the source cell, and after receiving the auxiliary data of the target cell, the terminal Performing a comparison to determine whether the two cell positioning assistance data are from the same reference station or the reference station identifiers are consistent. If they are consistent, the positioning assistance data obtained from the target station can be directly used to perform positioning and the positioning assistance data of the previous source cell is previously used for positioning. . Specifically, the auxiliary data of the received target cell may be used to continuously update the previously saved positioning assistance data to continuously perform positioning. If it is found that the two cell positioning assistance data are not from the same reference station or the reference station identifier is different, there may be two operations: one is still using the saved positioning assistance data from the source cell for positioning to ensure that the positioning is not interrupted. At the same time, the auxiliary data of the target cell is received, and the data obtained from the target cell can be highly accurately located or the high-precision solution can be used to stop using the saved positioning data of the source cell, and the data can also be deleted. The other is that the positioning assistance data of the source cell is still received from the source cell to maintain the positioning, and the positioning assistance data is also received from the target station. The data may be deleted until the data obtained from the target cell can be highly accurately located or the high-precision solution is obtained and the positioning assistance data of the source cell is stopped.

The handover in the implementation of the present application may be a handover of a connected state or a cell reselection by an idle state.

When the terminal device in the connected state performs cell handover, the source base station needs to select the target base station, and sends a handover request to the target base station. To ensure that the location service of the terminal device does not interrupt after the cell device is switched, the present application provides a A method for obtaining a message is used to solve the problem that the terminal device locates the service after the cell device is switched.

It should be noted that the embodiment shown in FIG. 4A is described by taking the cell reselection as an example. The embodiment shown in FIG. 4B and FIG. 4C illustrates the cell handover as an example. In fact, as shown in FIG. 4A to FIG. 4C. The embodiment can be used in the scenario where the terminal device is in the connection state of the connection state, and is also applicable to the scenario in which the terminal device is in the cell reselection in the idle state. The reselection in the embodiment of the present application can be regarded as a special handover.

As shown in FIG. 5, the present application provides a communication method, including:

Step 501: The indication message sent by the terminal device to the source base station when the terminal device determines that the positioning needs to be performed, the indication message is used to indicate that the terminal device needs to locate the auxiliary data, and the source base station receives the indication message sent by the terminal device.

Step 502: The source base station sends a handover request to the target base station when determining that the cell needs to be switched, where the handover request includes a request indication for requesting positioning assistance data, and the target base station receives the handover request sent by the source base station.

Step 503: The target base station sends positioning assistance data to the source base station, where the source base station receives positioning assistance data sent by the target base station.

Step 504: The source base station sends the positioning assistance data to the terminal device.

The handover request may also be restricted for other messages.

In fact, in step 503, the target base station may also send a first location indication message, a second location indication message or a third location indication message to the source base station, where the first location indication message is used to indicate the The positioning reference station of the target base station is the same as the positioning reference station of the source base station; the second positioning indication message is used to indicate that the positioning reference station of the target base station is different from the positioning reference station of the source base station; And indicating that the target base station has no broadcast positioning assistance data. Correspondingly, the source base station receives the first positioning indication message, the second positioning indication message or the third positioning indication message sent by the target base station.

When the terminal device determines that the positioning needs to be performed, the base station needs to send the positioning assistance data, and the source base station needs to send the indication message. Specifically, the indication message may carry some or all of the following types: the type of the positioning assistance data, the global satellite. The Global Navigation Satellite System ID (GNSS ID), the location reference station identifier.

The indication message may be carried in an uplink radio resource control (RRC) message, such as a cell measurement report information, a reconfiguration message, an RRC connection setup complete message, and the like.

The type of the positioning assistance data indicates the type of the positioning assistance data required by the terminal device, and may also be a specific SIB number, where the GNSS ID indicates the satellite system identifier from which the positioning assistance data required by the terminal device is derived, such as GPS, GLONASS, BDS, etc., the positioning reference station identifier indicates a positioning reference station from which the positioning assistance data required by the terminal device comes from.

After receiving the indication message, and determining that the cell needs to be switched, the source base station sends a handover request to the target base station, and requests positioning assistance data from the target base station by using a handover request. Specifically, the source base station may be in the The handover request includes a request indication for requesting positioning assistance data.

Specifically, the request indication may carry part or all of the following: a type of positioning assistance data, a GNSS ID, and a positioning reference station identifier.

After receiving the handover request, the target base station may send positioning assistance data to the source base station according to the handover request, for example, the target base station carries the positioning assistance data in a response message of the reply source base station.

a possible implementation manner, the target base station may determine, according to the positioning assistance data of the target base station, a positioning reference station of the target base station; determine, according to the request message, a positioning reference station of the source base station; the target base station The positioning reference station transmits positioning assistance data to the source base station when the positioning reference station is different from the positioning reference station of the source base station; wherein the request indication includes positioning reference station information of the source base station.

The positioning reference station of the target base station is different from the positioning reference station of the source base station, and the positioning assistance data broadcasted by the target base station and the positioning assistance data broadcast by the source base station are from different positioning reference stations, in order to make the The terminal device can receive the positioning assistance data broadcast by the target base station before performing the cell handover, and the target base station can send the positioning assistance data to the terminal device, so that the handover can be performed according to the handover after the terminal device performs the cell handover. The previously received positioning assistance data and the positioning assistance data received after the handover are positioned to ensure the continuity of the positioning service of the terminal device.

When the target base station determines that the positioning reference station of the target base station is different from the positioning reference station of the source base station, the target base station may also send a second positioning indication message to the source base station, where the second positioning indication message is used. The positioning reference station indicating the target base station is different from the positioning reference station of the source base station; the target base station may separately send the positioning assistance data and the second positioning indication message, and may also set the positioning assistance data and the second positioning indication message. It is included in one signaling.

The target base station may first locate an indication message to the source base station when determining that the positioning reference station of the target base station is the same as the positioning reference station of the source base station.

If the target base station determines that there is no broadcast positioning assistance data, the target base station may third locate the indication message to the source base station.

The target base station may also be indeterminate whether the positioning reference station of the target base station is the same as the positioning reference station of the source base station, and send positioning assistance data to the source base station.

After receiving the positioning assistance data, the source base station may forward the positioning assistance data to the terminal device, or may first determine whether the positioning reference station of the target base station and the positioning reference station of the source base station are the same.

When the source base station sends the positioning assistance data to the terminal device, the positioning assistance data may be carried in the RRC reconfiguration message.

If the source base station determines that the positioning reference station of the source base station and the positioning reference station of the target base station are the same, it is not necessary to send the positioning assistance data to the terminal device. In addition, the terminal device may send an indication information to indicate that the positioning assistance data of the switched cell and the positioning assistance data of the current cell are from the same reference station. If different, the positioning assistance data received from the target base station can be sent to the terminal device.

In addition, if the base station does not perform the judgment, the source base station directly forwards the data sent by the target base station to the terminal, and the terminal can determine whether the data is from the same reference station after parsing the positioning auxiliary data, and if so, only one data needs to be retained, such as the current The positioning assistance data of the cell, if not the same reference station terminal, saves the received data, and uses the cell to perform positioning after switching to the target cell.

Specifically, if the source base station and the target base station can determine whether the reference stations are the same, it is required to be able to identify the reference station information in the positioning assistance data or receive the reference station information. The information of the reference station, such as the identification information, may be sent to the base station through the server, so that the source base station and the target base station can determine whether the reference station is the same reference station.

Specifically, before the source base station determines whether the positioning reference station of the target base station is the same as the positioning reference station of the source base station, the positioning reference station of the target base station needs to be determined, and if the source base station can parse the target And determining, by the base station, the positioning reference station of the target base station according to the positioning assistance data sent by the target base station; that is, the positioning assistance data includes reference station information.

The source base station determines a positioning reference station of the source base station according to the positioning assistance data of the source base station.

For a description of the positioning reference station information carried in the positioning assistance data, refer to the embodiment shown in FIG. 3, and details are not described herein again.

If the source base station cannot parse the positioning assistance data sent by the target base station, the source base station may request the positioning base station information of the target base station from the target base station, where the source base station may send the first request to the target base station. a message, the first request message is used to request information about a positioning reference station of the target base station, and the target base station includes positioning reference station information of the target base station in the first feedback message, to the source The base station sends the first feedback message, and the source base station receives the first feedback message, and determines a positioning reference station of the target base station according to the first feedback message.

It should be noted that, when the target base station sends the first feedback message to the source base station, it may be sent in a manner that is visible to the source base station, or may be sent in a manner identifiable by the source base station to ensure that the source base station is in the After receiving the first feedback message, the positioning reference station of the target base station may be determined by using the first feedback message.

The source base station determines that the positioning reference station of the target base station is different from the positioning reference station of the source base station, and sends the positioning assistance data to the terminal device; the source base station determines a positioning reference station of the target base station and The location reference station of the source base station is the same, and the source base station may not send the location assistance data to the terminal device. Of course, the location assistance data may also be sent to the terminal device.

Receiving, by the source base station, the second positioning indication message sent by the target base station, the source base station may determine, by using the second positioning indication message, a positioning reference station of the target base station and a positioning reference station of the source base station Differently, the positioning assistance data is sent to the terminal device.

Receiving, by the source base station, the first positioning indication message sent by the target base station, the source base station may determine, by using the first positioning indication message, a positioning reference station of the target base station and a positioning reference station of the source base station In the same manner, after determining that the terminal device is switched to the target cell, the terminal device positioning service is not interrupted, and the source base station may send a handover indication to the terminal device, to indicate that the terminal device switches to the target base station, or may The terminal device broadcasts positioning assistance data.

The source base station receives the third location indication message sent by the target base station, and the source base station may determine, by using the third location indication message, that the target base station has no broadcast positioning assistance data. The cell in which the target base station is located may not support the location service, and the source base station may continue to perform the handover operation, for example, sending a handover indication to the terminal device, or reselecting the base station to which the terminal device needs to be handed over.

After receiving the positioning assistance data, the terminal device may save the positioning assistance data, or first determine whether the positioning reference station of the target base station is the same as the positioning reference station of the source base station, and if the same, delete the positioning assistance data, Otherwise, the positioning assistance data is saved.

In addition, the terminal device sends the indication information that needs the location service to the base station, and can also be used by the base station to switch to a cell that supports the location service when making the handover decision.

The positioning reference station of the source base station or the cell and the positioning reference station of the target base station or the cell in the present application indicate the reference station from which the positioning assistance data of the station or the cell comes.

Based on the same inventive concept as the method embodiment, the embodiment of the present invention provides a communication device 600, which may be a terminal or a device (such as a chip or a chip system) in the terminal. It should be noted that, in the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The communication device 600 is specifically configured to implement the method described in the embodiment shown in FIG. 3. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the details of the device are not described again. As shown in FIG. 6, a selection unit 601 and a processing unit 602 are included, wherein:

The selecting unit 601 is configured to select one candidate cell from the set of candidate cells as the target cell, where the candidate cell set includes at least one candidate cell;

The processing unit 602 is configured to reselect from a source cell to the target cell, where the target cell is a cell that supports a positioning service, and the source cell is a cell that the terminal device camps before a cell reselection. .

In a possible implementation manner, the target cell is a candidate cell with the highest priority among the candidate cell sets, and the priority of the target cell is not lower than a priority of the source cell, where the source cell and the source cell are For any candidate cell, the priority of the cell supporting the positioning service is higher than the priority of the cell not supporting the positioning service; the terminal device reselects from the source cell to the target cell.

In a possible implementation, the target cell is a candidate cell with the highest R value calculated based on the R criterion in the candidate cell set, and the R value calculated by the R criterion based on the target cell is based on the location of the candidate cell. The amount of offset is determined.

Optionally, the priority is obtained by the terminal device from system broadcast or unicast.

Optionally, the positioning offset is obtained by the terminal device from system broadcast or unicast.

There are many ways to calculate the value of R. Here are two of them:

The R value of the first type and the source cell meets the following formula requirements:

R _s =Q _meas,s +Q _Hyst -Qoffset _temp+ offsetpos

R _n =Q _meas,n -Qoffset-Qoffset _temp+ offsetpos

Second, the R value of the source cell meets the following formula:

R _s =Q _meas,s +Q _Hyst -Qoffset _temp -offsetpos

Where Q _{meas, s} is the RSRP measurement value of the source cell, Q _Hyst is the hysteresis amount of the source cell, Qoffset _temp is the temporary compensation value of the source cell, and Offsetposi is the positioning offset of the source cell. ;

R _n =Q _meas,n -Qoffset-Qoffset _temp -offsetpos

Based on the same inventive concept as the method embodiment, the embodiment of the present invention provides a communication device 700, which may be a terminal or a device (such as a chip or a chip system) in the terminal. It should be noted that, in the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The communication device 700 is specifically configured to implement the method described in the embodiment shown in FIG. 4A. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the details of the device are not described again. As shown in FIG. 7, a transmission unit 701 and a processing unit 702 are included, wherein:

The transmitting unit 701 is configured to receive first positioning assistance data and second positioning assistance data, where the first positioning assistance data is the target cell before the terminal device reselects from the source cell to the target cell The positioning assistance data that is sent, the second positioning assistance data is positioning assistance data sent by the target cell after the terminal device reselects from the source cell to the target cell.

The processing unit 702 is configured to perform positioning according to the first positioning assistance data and the second positioning assistance data.

Optionally, before the processing unit 702 performs positioning according to the first positioning assistance data and the second positioning assistance data, the processing unit 702 first determines positioning of the positioning reference station and the source cell of the target cell. The reference station is different.

In a possible implementation manner, the processing unit 702 determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and performs positioning according to the second positioning assistance data and the third positioning assistance data, where The third positioning assistance data is positioning positioning data that is sent by the source cell before the terminal device reselects to the target cell, and is saved by the transmission unit 701.

In a possible implementation manner, the processing unit 702 determines, before determining whether the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the processing unit 702 determines a positioning reference station of the target cell and The positioning reference station of the source cell, first, the processing unit 702 reads the first positioning assistance data; and then determines a positioning reference station of the target cell according to the first positioning assistance data; and according to the third positioning assistance data Determining a positioning reference station of the source cell, where the third positioning assistance data is positioning positioning data that is sent by the source cell before the terminal device reselects to the target cell.

In a possible implementation manner, before the processing unit 702 determines the positioning reference station of the target cell according to the first positioning assistance data, the processing unit 702 determines that the target cell meets part or all of the following conditions:

Condition 4: The target cell supports a positioning service;

In a possible implementation manner, after the processing unit 702 determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the first positioning assistance data is deleted.

Optionally, the first positioning assistance data and the second positioning assistance data are unicast or broadcasted by the target cell, and the third positioning assistance data is unicast or broadcast by the source cell.

The communication device 700 can also be used to implement the method described in the embodiment shown in FIG. 4B. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.

The transmitting unit 701 is configured to: after the source cell is switched to the target cell, after determining that the positioning reference station of the target cell is different from the positioning reference station of the source cell, receiving the first positioning assistance data sent by the source cell;

The processing unit 702 is configured to perform positioning according to the first positioning assistance data and the second positioning assistance data, where the second positioning assistance data is saved by the transmission unit 701, and is switched from the source cell to Positioning assistance data sent by the source cell before the target cell.

a possible implementation manner, the processing unit 702 determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell; afterwards, the processing unit 702 is configured according to the second positioning assistance data and the third The positioning assistance data is used for positioning, and the third positioning assistance data is positioning assistance data sent by the target cell that is received by the transmission unit 701 after being switched from the source cell to the target cell.

In a possible implementation manner, when the processing unit 702 determines the positioning reference station of the target cell and the positioning reference station of the source cell, the first positioning assistance data is first read; and then the first positioning assistance data is determined according to the first positioning assistance data. Determining a positioning reference station of the source cell; determining a positioning reference station of the target cell according to the third positioning assistance data.

In a possible implementation manner, after the processing unit 702 determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the second positioning system message is deleted.

The communication device 700 can also be used to implement the method described in the embodiment shown in FIG. 4C. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.

The transmitting unit 701 is configured to save, after the handover from the source cell to the target cell, the first positioning assistance data, where the first positioning assistance data is that the terminal device switches from the source cell to the target cell Positioning assistance data sent by the source cell;

The processing unit 702 is configured to determine that the positioning reference station of the target cell is different from the positioning reference station of the source cell, and determine that the positioning reference station of the target cell is different from the positioning reference station of the source cell, according to the first positioning assistance data. Positioning.

a possible implementation manner, the processing unit 702 determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, and performs positioning according to the first positioning assistance data and the second positioning assistance data. The second positioning assistance data is positioning assistance data sent by the target cell that is received by the terminal device after being switched from the source cell to the target cell.

In a possible implementation manner, the processing unit 702 determines, before determining whether the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the processing unit 702 determines a positioning reference station of the target cell and The positioning reference station of the source cell first reads the first positioning assistance data; then determines the positioning reference station of the source cell according to the first positioning assistance data; the processing unit 702 is configured according to the second positioning assistance data. Determining a positioning reference station of the target cell, where the second positioning assistance data is positioning assistance data sent by the target cell that is received by the terminal device after being switched from the source cell to the target cell.

a possible implementation manner, after the processing unit 702 performs positioning according to the first positioning assistance data, the transmission unit 701 may continue to receive the second positioning assistance data, and the processing unit 702 is configured according to the second The positioning assistance data is positioned to stop positioning according to the first positioning assistance data.

In a possible implementation manner, the processing unit 702 deletes the first positioning assistance data after performing positioning according to the first positioning assistance data.

Based on the same inventive concept as the method embodiment, the embodiment of the present invention provides a communication device 800, which may be a base station or a device (such as a chip or a chip system) in a base station. It should be noted that, in the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The communication device 800 is specifically configured to implement the method on the source base station side described in the embodiment of FIG. 5. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method may be referred to each other, and the repeated description is not repeated. The structure of the device is as shown in FIG. 8, and includes a transmission unit 801 and a processing unit 802, wherein:

The transmitting unit 801 is configured to receive an indication message sent by the terminal device, where the indication message is used to indicate that the terminal device needs to locate the auxiliary data, and when determining that the cell needs to be switched, send a handover request to the target base station, where the handover is performed. The request includes a request indication for requesting positioning assistance data; and receiving positioning assistance data or a first positioning indication message sent by the target base station, where the first positioning indication message is used to indicate a positioning reference station of the target base station The positioning reference stations of the source base station are the same.

The processing unit 802 is configured to determine that a cell needs to be switched.

In a possible implementation manner, after the processing unit 802 receives the positioning assistance data sent by the target base station, the transmitting unit 801 sends the positioning assistance data to the terminal device.

In a possible implementation manner, before the transmitting unit 801 receives the positioning assistance data sent by the target base station and sends the received positioning assistance data to the terminal device, the processing unit 802 determines the target base station. Positioning reference station; determining that the positioning reference station of the target base station is different from the positioning reference station of the source base station, wherein the positioning reference station of the source base station is the processing unit 802 according to the positioning assistance of the source base station The data is determined.

In a possible implementation, the processing unit 802, when determining the positioning reference station of the target base station, may determine the positioning reference station of the target base station according to the positioning assistance data sent by the target base station.

In a possible implementation, the processing unit 802, when determining the positioning reference station of the target base station, if the handover request carries the first request information, the first request information is used to request the target base station. Locating the reference station information; the transmitting unit 801 receives the first feedback message sent by the target base station, where the first feedback message includes positioning reference station information of the target base station; and the processing unit 802 is configured according to the first feedback The message determines a positioning reference station of the target base station.

In a possible implementation manner, the indication information includes at least one of the following: a type of positioning assistance data, a GNSS ID, and positioning reference station information of the source base station.

A possible implementation, characterized in that the request indication comprises the following types of at least one of the positioning assistance data, the GNSS ID, positioning reference station information of the source base station.

In a possible implementation, the first positioning indication message includes at least one of the following: a GNSS ID, positioning reference station information of the target base station.

The communication device 800 may also be specifically used to implement the method of the target base station side described in the embodiment of FIG. 5. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method may be mutually referred to, and the repetition is not Further, the structure of the device is as shown in FIG. 8, and includes a transmission unit 801 and a processing unit 802, where:

The transmitting unit 801 is configured to receive a handover request sent by the source base station, where the handover request includes a request message for requesting positioning assistance data, and send positioning assistance data or a first positioning indication message to the source base station, where The first positioning indication message is used to indicate that the positioning reference station of the target base station is the same as the positioning reference station of the source base station.

In a possible implementation manner, before the transmitting unit 801 sends the positioning assistance data to the source base station, the processing unit 802 determines a positioning reference station of the source base station according to the request message, where the request indication includes the Positioning reference station information of the source base station; the processing unit 802 determines that the positioning reference station of the target base station is different from the positioning reference station of the source base station, wherein the positioning reference station of the target base station is the target base station according to the target The positioning assistance data of the base station is determined.

In a possible implementation manner, the transmitting unit 801 sends a first positioning indication message to the source base station, where the target base station determines a positioning reference station of the source base station according to the request message, where the request indication includes the source Positioning reference station information of the base station; when the processing unit 802 determines that the positioning reference station of the target base station is the same as the positioning reference station of the source base station, the transmitting unit 801 sends a first positioning indication message to the source base station, where the The positioning reference station of the target base station is determined by the target base station according to the positioning assistance data of the target base station.

a possible implementation, if the handover request carries the first request information, the first request information is used to request positioning reference station information of the target base station; and the transmitting unit 801 sends the information to the source base station. a first feedback message, where the first feedback message includes positioning reference station information of the target base station;

In a possible implementation manner, the request indication includes at least one type of the positioning assistance data, the GNSS ID, positioning reference station information of the source base station.

Based on the same inventive concept as the method embodiment, the embodiment of the present invention provides a communication device 900, which may be a terminal or a device (such as a chip or a chip system) in the terminal. It should be noted that, in the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The communication device 900 is specifically configured to implement the method performed by the terminal device described in the embodiment shown in FIG. 5. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method may be referred to each other, and the repeated description is not repeated herein. The structure of the device is as shown in FIG. 9, and includes a transmission unit 901 and a processing unit 902, wherein:

The processing unit 902 is configured to determine that positioning needs to be performed;

The transmitting unit 901 is configured to: when the processing unit 902 determines that the positioning needs to be performed, send an indication message to the source base station, where the indication message is used to indicate that the terminal device needs to locate the auxiliary data; and receive the source base station. The positioning assistance data sent.

a possible implementation manner, after the transmitting unit 901 receives the positioning assistance data sent by the source base station, the processing unit 902 determines a positioning reference station of the target base station according to the positioning assistance data; The received source base station sends the positioning assistance data to determine the positioning reference station of the source base station; the processing unit 902 determines that the positioning reference station of the target base station is the same as the positioning reference station of the source base station, and deletes the positioning assistance data, otherwise And save the positioning assistance data.

The division of the unit in the embodiment of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner. In addition, each functional unit in each embodiment of the present application may be integrated into one processing. In the device, it may be physically existed alone, or two or more units may be integrated into one module. The above integrated unit can be implemented in the form of hardware or in the form of a software function module.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, can be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a terminal device (which may be a personal computer, a cell phone, or a network device, etc.) or a processor to perform all or part of the steps of the method of various embodiments of the present application. 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, which can store program code. .

In the embodiment of the present application, the terminal devices may be presented in an integrated manner to divide the form of each functional module. A "module" herein may refer to a particular ASIC, circuitry, processor and memory that executes one or more software or firmware programs, integrated logic circuitry, and/or other devices that provide the functionality described above. In a simple embodiment, those skilled in the art will appreciate that the terminal device can take the form shown in FIG.

The communication device 1100 shown in FIG. 10 includes at least one processor 1001, a memory 1002, and optionally, a transceiver 1003.

The memory 1002 may be a volatile memory such as a random access memory; the memory may also be a non-volatile memory such as a read only memory, a flash memory, a hard disk drive (HDD) or a solid state drive (solid-state drive, SSD), or memory 1002, is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory 1002 may be a combination of the above memories.

The specific connection medium between the processor 1001 and the memory 1002 is not limited in the embodiment of the present application. The embodiment of the present application is connected between the memory 1002 and the processor 1001 through the bus 1004 in the figure. The bus 1004 is indicated by a thick line in the figure, and the connection manner between other components is only for illustrative description, and is not cited. Limited. The bus 1004 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 10, but it does not mean that there is only one bus or one type of bus.

The processor 1001 can have a data transceiving function and can communicate with other devices. In the device of FIG. 10, an independent data transceiving module, such as the transceiver 1003, can be configured to transmit and receive data. The processor 1001 is in communication with other devices. When communicating, data can be transmitted through the transceiver 1003.

When the terminal device adopts the form shown in FIG. 10, the processor 1001 in FIG. 10 can execute an instruction by calling a computer stored in the memory 1002, so that the communication device can execute the terminal device executed in any of the above method embodiments. method.

Specifically, the function/implementation process of the selection unit, the transmission unit, and the processing unit in FIG. 6, FIG. 7, and FIG. 9 can be implemented by the processor 1001 in FIG. 10 calling the computer execution instruction stored in the memory 1002. Alternatively, the function/implementation process of the selection unit and the processing unit in FIG. 6, FIG. 7, and FIG. 9 can be implemented by the processor 1001 in FIG. 10 calling the computer execution instruction stored in the memory 1002, in FIG. 7 and FIG. The function/implementation process of the transmission unit can be implemented by the transceiver 1003 in FIG.

The processor 1001 may include one or more CPUs. The communication device 1000 can include a plurality of processors 1001.

In the embodiment of the present application, the base station (including the source base station and the target base station) can be presented in an integrated manner to divide the form of each functional module. A "module" herein may refer to a particular ASIC, circuitry, processor and memory that executes one or more software or firmware programs, integrated logic circuitry, and/or other devices that provide the functionality described above. In a simple embodiment, those skilled in the art will appreciate that the base station can take the form shown in FIG.

The communication device 1100 shown in FIG. 11 includes at least one processor 1101, a memory 1102, and optionally, a communication interface 1103.

The memory 1102 can be a volatile memory, such as a random access memory; the memory can also be a non-volatile memory, such as a read only memory, a flash memory, a hard disk drive (HDD), or a solid state drive (solid-state drive, SSD), or memory 1102, is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory 1102 can be a combination of the above memories.

The specific connection medium between the processor 1101 and the memory 1102 is not limited in the embodiment of the present application. In the figure, the memory 1102 and the processor 1101 are connected by a bus 1104 in the figure. The bus 1104 is shown by a thick line in the figure, and the connection manner between other components is only for illustrative description, and is not cited. Limited. The bus 1104 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.

The processor 1101 can have a data transceiving function and can communicate with other devices. In the device of FIG. 11, an independent data transceiving module, such as a communication interface 1103, can be provided for transmitting and receiving data; the processor 1101 performs with other devices. When communicating, data can be transmitted through the communication interface 1103.

When the base station adopts the form shown in FIG. 11, the processor 1101 in FIG. 11 can execute an instruction by calling a computer stored in the memory 1102, so that the communication device can execute the base station (including the source base station) in any of the above method embodiments. And the method performed by the target base station).

Specifically, the function/implementation process of the transmission unit and the processing unit in FIG. 8 can be implemented by the processor 1101 in FIG. 11 calling the computer execution instruction stored in the memory 1102. Alternatively, the function/implementation process of the = processing unit in FIG. 8 can be implemented by the processor 1101 in FIG. 11 calling the computer execution instructions stored in the memory 1102, and the function/implementation process of the transmission unit in FIG. 8 can be performed through FIG. The communication interface 1103 is implemented.

The processor 1101 may include one or more CPUs. The communication device 1100 can include a plurality of processors 1101.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

A communication method, characterized in that the method comprises:

The terminal device selects one candidate cell as the target cell from the set of candidate cells, where the candidate cell set includes at least one candidate cell;

The terminal device is reselected from the source cell to the target cell, where the target cell is a cell that supports a positioning service, and the source cell is a cell that the terminal device camps before the cell reselection.
The method according to claim 1, wherein the target cell is a candidate cell with the highest priority among the candidate cell sets.
The method according to claim 1, wherein the target cell is a candidate cell with the highest R value calculated based on the R criterion in the candidate cell set, and the R value of the target cell is higher than that of the source cell. The R value, the R value calculated by the R criterion based on the candidate cell is determined according to the positioning offset of the candidate cell.
The method of claim 2 wherein said priority is obtained by said terminal device from system broadcast or unicast.
The method of claim 3 wherein said positioning offset is obtained by said terminal device from system broadcast or unicast.
The method according to claim 3, wherein the R value calculation of the source cell meets the following formula requirements:

R s =Q meas,s +Q Hyst -Qoffset temp +offsetpos

Where Q meas, s is the reference signal received power RSRP measurement value of the source cell, Q Hyst is the hysteresis amount of the source cell, Qoffset temp is the temporary compensation value of the source cell, and Offsetposi is the source cell Positioning offset

The R value calculation of the candidate cell meets the following formula requirements:

R n =Q meas,n -Qoffset-Qoffset temp +offsetpos

Where Q meas, n is the RSRP measurement value of the candidate cell, Qoffset is the offset of the candidate cell, Qoffset temp represents the temporary compensation value for the candidate cell, and Offsetposi is the positioning offset of the candidate cell. the amount.
The method according to claim 3, wherein the R value calculation of the source cell meets the following formula requirements:

R s =Q meas,s +Q Hyst -Qoffset temp -offsetpos

Where Q meas, s is the RSRP measurement value of the source cell, Q Hyst is the hysteresis amount of the source cell, Qoffset temp is the temporary compensation value of the source cell, and Offsetpos is the positioning offset of the source cell. ;

The R value calculation of the candidate cell meets the following formula requirements:

R n =Q meas,n -Qoffset-Qoffset temp -offsetpos

Wherein, Q meas, n is an RSRP measurement value of the candidate cell, Qoffset is an offset of the candidate cell, Qoffset temp represents a temporary compensation value for the candidate cell, and Offsetpos is a positioning offset of the candidate cell. the amount.
A communication method, characterized in that the method comprises:

The terminal device receives the first positioning assistance data and the second positioning assistance data, where the first positioning assistance data is positioning assistance data sent by the target device before the terminal device reselects from the source cell to the target cell, The second positioning assistance data is positioning assistance data sent by the target cell after the terminal device reselects from the source cell to the target cell;

The terminal device performs positioning according to the first positioning assistance data and the second positioning assistance data.
The method of claim 8, wherein before the positioning, by the terminal device, according to the first positioning assistance data and the second positioning assistance data, the method further comprises:

The terminal device determines that the positioning reference station of the target cell is different from the positioning reference station of the source cell.
The method of claim 8 wherein the method further comprises:

Determining, by the terminal device, that the positioning reference station of the target cell is the same as the positioning reference station of the source cell;

The terminal device performs positioning according to the second positioning assistance data and the third positioning assistance data, where the third positioning assistance data is saved by the terminal device, and the terminal device is reselected to the target cell. The positioning assistance data sent by the source cell before.
The method according to claim 9 or 10, wherein the determining, by the terminal device, the positioning reference station of the target cell and the positioning reference station of the source cell comprises:

Determining, by the terminal device, a positioning reference station of the target cell according to the first positioning assistance data;

Determining, by the terminal device, the positioning reference station of the source cell according to the third positioning assistance data, where the third positioning assistance data is saved by the terminal device, before the terminal device reselects to the target cell Location assistance data sent by the cell.
The method according to claim 11, wherein the determining, by the terminal device, the positioning reference station of the target cell according to the first positioning assistance data further comprises:

The terminal device determines that the target cell meets part or all of the following conditions:

The signal quality of the target cell is greater than a set threshold;

The priority of the target cell is higher than the priority of the source cell;

The R value of the target cell is higher than the R value of the source cell;

The target cell supports a location service.
The method according to claim 8, wherein the first positioning assistance data and the second positioning assistance data are unicast or broadcasted by the target cell, and the third positioning assistance data is the source The cell is unicast or broadcast.
The method according to claim 8, wherein after the terminal device determines that the positioning reference station of the target cell is the same as the positioning reference station of the source cell, the terminal device further includes:

The terminal device deletes the first positioning assistance data.
A communication method, characterized in that the method comprises:

After the terminal device is switched from the source cell to the target cell, the terminal device stores first positioning assistance data, where the first positioning assistance data is the source cell before the terminal device switches from the source cell to the target cell Positioning assistance data sent;

After determining that the positioning reference station of the target cell is different from the positioning reference station of the source cell, the terminal device performs positioning according to the first positioning assistance data.
The method of claim 15 wherein the method further comprises:

Determining, by the terminal device, that the positioning reference station of the target cell is the same as the positioning reference station of the source cell;

The terminal device performs positioning according to the first positioning assistance data and the second positioning assistance data, where the second positioning assistance data is the target that is received after the terminal device switches from the source cell to the target cell. Location assistance data sent by the cell.
The method according to claim 15 or 16, wherein the terminal device determines a positioning reference station of the target cell and a positioning reference station of the source cell, including:

Determining, by the terminal device, a positioning reference station of the source cell according to the first positioning assistance data;

Determining, by the terminal device, the positioning reference station of the target cell according to the second positioning assistance data, where the second positioning assistance data is the target cell that is received after the terminal device switches from the source cell to the target cell The positioning assistance data sent.
The method according to claim 15, wherein after the positioning by the terminal device according to the first positioning assistance data, the method further comprises:

The terminal device performs positioning according to the second positioning assistance data, and stops positioning according to the first positioning assistance data.
A communication method, characterized in that the method comprises:

Receiving, by the source base station, an indication message sent by the terminal device, where the indication message is used to indicate that the terminal device needs to locate the auxiliary data;

The source base station sends a handover request to the target base station when determining that the cell needs to be switched, where the handover request includes a request indication for requesting positioning assistance data;

The source base station receives the positioning assistance data or the first positioning indication message sent by the target base station, where the first positioning indication message is used to indicate that the positioning reference station of the target base station is the same as the positioning reference station of the source base station.
The method according to claim 19, wherein after the source base station receives the positioning assistance data sent by the target base station, the method further includes:

The source base station sends the positioning assistance data to the terminal device.
The method according to claim 20, wherein, after the source base station receives the positioning assistance data sent by the target base station, before the source base station sends the positioning assistance data to the terminal device, the method further includes:

Determining, by the source base station, a positioning reference station of the target base station;

The source base station determines that the positioning reference station of the target base station is different from the positioning reference station of the source base station, where the positioning reference station of the source base station is determined by the source base station according to the positioning assistance data of the source base station. .
The method according to claim 21, wherein the determining, by the source base station, the positioning reference station of the target base station comprises:

The source base station determines a positioning reference station of the target base station according to the positioning assistance data sent by the target base station.
The method according to claim 21, wherein the determining, by the source base station, the positioning reference station of the target base station comprises:

If the handover request carries the first request information, the first request information is used to request positioning reference station information of the target base station;

Receiving, by the source base station, a first feedback message sent by the target base station, where the first feedback message includes positioning reference station information of the target base station;

The source base station determines a positioning reference station of the target base station according to the first feedback message.
The method of claim 19, wherein the indication information comprises at least one of: a type of positioning assistance data, a global satellite navigation system identification GNSS ID, and positioning reference station information of the source base station.
The method of claim 19, wherein the request indication comprises at least one of: a type of the positioning assistance data, the GNSS ID, positioning reference station information of the source base station.
A communication method, characterized in that the method comprises:

Receiving, by the target base station, a handover request sent by the source base station, where the handover request includes a request message for requesting positioning assistance data;

The target base station sends the positioning assistance data or the first positioning indication message to the source base station, where the first positioning indication message is used to indicate that the positioning reference station of the target base station is the same as the positioning reference station of the source base station.
The method according to claim 26, wherein before the target base station sends the positioning assistance data to the source base station, the method further includes:

Determining, by the target base station, a positioning reference station of the source base station according to the request message, where the request indication includes positioning reference station information of the source base station;

The target base station determines that the positioning reference station of the target base station is different from the positioning reference station of the source base station, wherein the positioning reference station of the target base station is determined by the target base station according to the positioning assistance data of the target base station.
The method of claim 26, wherein the sending, by the target base station, the first location indication message to the source base station comprises:

Determining, by the target base station, a positioning reference station of the source base station according to the request message, where the request indication includes positioning reference station information of the source base station;

When the target base station determines that the positioning reference station of the target base station is the same as the positioning reference station of the source base station, the first positioning indication message is sent to the source base station, where the positioning reference station of the target base station is the target base station according to the The positioning assistance data of the target base station is determined.
The method of claim 26, wherein the method further comprises:

If the handover request carries the first request information, the first request information is used to request positioning reference station information of the target base station;

a first feedback message sent by the target base station to the source base station, where the first feedback message includes positioning reference station information of the target base station.
A communication device, comprising:

A processor for coupling with a memory, reading instructions from the memory, executing the instructions to implement the method of any of claims 1-29.