WO2014000505A1

WO2014000505A1 - Radio resource management method, base station and terminal

Info

Publication number: WO2014000505A1
Application number: PCT/CN2013/074931
Authority: WO
Inventors: 刘劲楠; 冯淑兰; 李亚娟; 时洁
Original assignee: 华为技术有限公司
Priority date: 2012-06-27
Filing date: 2013-04-28
Publication date: 2014-01-03
Also published as: CN103517314A

Abstract

The present invention is applicable in the field of communications, and provided are a radio resource management method and device. The method comprises: after completing the measurement on the reference signal time difference (RSTD) on one or more positioning measurement occasions of an observed positioning reference signal, receiving terminal UE sending a radio resource control (RRC) signaling, the RRC signaling comprising an RSTD measurement result on one or more positioning measurement occasions of a positioning reference signal, and the RSTD measurement result being expressed by the time of arrival (TOA) of reference signal subframes from a plurality of cells or the reference signal time difference (RSTD) from a plurality of cells relative to the time of arrival of a positioning reference cell; and according to the time of arrival of the reference signal subframes from a plurality of cells or the reference signal time difference, conducting radio resource management. The technical solution provided in a specific embodiment of the present invention has the advantage of reducing the time delay.

Description

[Technical Field] The present invention relates to the field of communications, and in particular, to a radio resource management method, a base station, and a terminal.

The location information of the terminal can be applied to the radio resource management, and the auxiliary service base station manages the radio resources used by the terminal. For example, according to the location information, the distance from the terminal to each neighbor base station (D), the estimated propagation delay (PD), the estimated path loss (PL), and the uplink advance time (TA) are used to assist the radio resource management. The terminal is also called a User Equipment (UE).

In the LTE (Long Term Evolution) positioning protocol LPP (LTE Positioning Protocol) defined by the 3GPP (3rd Generation Partnership Project), the OTDOA (observed Time Difference of Arrival) measurement process is as follows:

Each cell sends a positioning reference signal (PRS), wherein the cell transmitting device may be different types of transmission points, including a macro base station Macro, a micro base station Micro, a pico base station Pico, and a radio remote RRH; the service terminal positioning center will measure the OTDOA measurement request and the OTDOA The auxiliary message is sent to the terminal; after receiving the OTDOA auxiliary message, the terminal starts the RSTD (Reference Signal Time Difference) measurement.

The terminal receives the RSTD of the PRS signal in one or more PRS positioning occasions, and reports the RSTD measurement result within the specified maximum reporting time. The service terminal positioning center performs positioning calculation according to the RSTD.

However, the measurement of OTDOA positioning RSTD report is transparently transmitted to the service terminal positioning center through the LPP layer. Therefore, the serving base station does not parse the LPP layer signaling, but transparently transmits it to the service terminal positioning center.

The service terminal positioning center calculates the location of the UE according to the RSTD, and then the radio resource management needs Calculating the distance from the terminal to the neighbor base station i according to the location of the terminal calculated by the serving terminal positioning center and the location of each base station Di = ι ( x _UE - x _eKBi ) + ( y _UE - y _eNB , i , where X _UE , Y _{The UE} is the coordinates of the terminal on the X-axis and the Y-axis, respectively, X _eNBi and Y _eNB i are the coordinates of eNBi on the X-axis and the Y-axis, respectively, the estimated propagation delay of the terminal to the neighbor base station i, PDi ^ Di/c, and the terminal to the neighbor Estimated path loss PL of base station i; = a og.o φ + a ₂ log ₁₀ (fq) + a ₃ , where c is the speed of light, is the distance coefficient, c1⁄2 is the carrier frequency coefficient, 0 ( ₃ environmental path loss constant, f _Ci is the carrier frequency.

According to Di, the radio resource management has a certain delay, including the transmission delay from the UE to the serving base station, the transmission delay of the serving base station to the serving terminal positioning center, and the calculation processing delay of the service terminal positioning center. The delay from the terminal positioning center to the serving base station, and the RRM calculation processing delay, etc., cause the use of the positioning information to assist the radio resource management delay. technical problem

The purpose of the embodiments of the present invention is to provide a method for managing a radio resource, which aims to reduce the delay of positioning assisted radio resource management and provide a more real-time radio resource management method.

Technical solution

The first aspect, a method for managing a radio resource, where the method includes:

Receiving, by the receiving terminal, radio resource control RRC signaling after completing a reference signal arrival time difference RSTD measurement in one or more positioning reference signal positioning measurement opportunities, where the RRC signaling includes: positioning the measurement signal by one or more positioning reference signals The result of the RSTD measurement, where the RSTD measurement result is represented as a reference signal arrival time difference of a plurality of cell reference signal subframe arrival times TO A or a plurality of cell relative positioning reference cell arrival times;

The radio resource management is performed according to the reference signal subframe arrival time or the reference signal arrival time difference of the plurality of cells.

With reference to the radio resource management method of the first aspect, in a first alternative of the first aspect, the radio resource management includes any combination of the following: assisting the terminal to determine downlink assisted multi-point transmission CoMP measurement Assessing, assisting the terminal to determine whether multiple cells of the multi-carrier aggregation CA are suitable for adoption (Detail 20.6) Use the same upstream advance TA, and determine the upstream high interference indicator.

With reference to the radio resource management method of the first aspect, in the second alternative of the first aspect, the RRC signaling further includes:

The RSTD measurement results with the cell identifier and frequency layer information corresponding to each cell.

With reference to the radio resource management method of the first aspect, the first alternative of the first aspect, or the second alternative of the first aspect, in the third alternative of the first aspect, when the radio resource When the management determines the downlink CoMP measurement set to assist the terminal, the performing radio resource management according to the reference signal subframe arrival time of the multiple cells includes:

Sorting the reference signal subframe arrival times of the plurality of cells, searching for the tth cell and the kth cell that satisfy the ITO A _t -TOA _k l< first preset threshold, and TO A _t is the tth cell Reference signal subframe arrival time, TOA _k is the reference signal subframe arrival time of the kth cell; determining that the transmission point corresponding to at least one of the tth to kth cells is the UE downlink ComP measurement set The first preset threshold is smaller than the length of the current cyclic prefix of the base station.

With reference to the radio resource management method of the first aspect, the first alternative of the first aspect, or the second alternative of the first aspect, in the fourth alternative of the first aspect, when the radio resource When the management determines the determined time advance set of the multi-carrier aggregation CA for the terminal, the performing radio resource management according to the reference signal arrival time difference of the multiple cells includes:

Obtaining a time difference between each of the plurality of cells and the serving cell to send the positioning reference signal PRS or the cell reference signal CRS;

Find the i-th cell and the k-th cell that satisfy the ITAOi - Δ PRSi - (TOA _k - Δ PRS _k ) l < second preset threshold, TOAi is the reference signal sub-frame arrival time of the i-th cell, TOA _k is The reference signal subframe arrival time of the kth cell, ΔPRSi is the time difference between the ith cell and the serving cell transmitting the positioning reference signal PRS or the cell reference signal CRS, and the A PRS _k is the kth cell and the serving cell transmitting the positioning reference signal The time difference of the PRS or the cell reference signal CRS; when the i-th cell and the k-th cell respectively have uplink resources on different frequency layers serving the terminal at the same time, the same is adopted for the i-th cell and the k-th cell The upstream time advance TA.

A radio resource management method according to the first aspect, the first option or the first aspect of the first aspect A second alternative of the first aspect, in the fifth optional aspect of the first aspect, when the radio resource management indicates the HII as the uplink high interference, the reference signal subframe arrival time or reference according to the multiple cells The signal arrival time difference for radio resource management includes:

Obtaining an uplink timing advance TA of the terminal;

Determining, according to the uplink transmit power of the terminal, the uplink interference range of the terminal, determining whether the distance from the terminal to each base station is smaller than the uplink interference range of the terminal, such as the terminal, according to the uplink timing advance of the terminal and the uplink interference range of the terminal. If the distance to the base station of the cell i is smaller than the uplink interference range of the terminal, the HII is indicated by the uplink high interference in the X2 interface, and the base station of the cell i is notified that there is interference on the resource scheduled by the terminal.

In a second aspect, a base station is provided, where the base station includes:

a receiving unit, configured to send, by the receiving terminal, radio resource control RRC signaling after completing a reference signal arrival time difference RSTD measurement in one or more positioning reference signal positioning measurement opportunities, where the RRC signaling includes: one or more positioning reference signals Locating an RSTD measurement result of the measurement opportunity, where the RSTD measurement result is represented as a reference signal subframe arrival time of multiple cells or a reference signal arrival time difference of a plurality of cells relative positioning reference cell arrival time, and a reference of the multiple cells The signal subframe arrival time or the reference signal arrival time difference is sent to the management unit;

And a management unit, configured to perform radio resource management according to a reference signal subframe arrival time of multiple cells or a reference signal arrival time difference.

With reference to a base station of the second aspect, in a first alternative of the second aspect, the radio resource management includes any combination of the following: assisting the terminal to determine a downlink assisted multi-point transmission CoMP measurement set, and assisting The terminal determines whether multiple cells of the multi-carrier aggregation CA are suitable to adopt the same uplink advancement TA and determine the uplink high interference indication HII.

With reference to the base station of the second aspect, in the second optional aspect of the second aspect, the RRC signaling further includes:

The RSTD measurement results with the cell identifier and frequency layer information corresponding to each cell. In conjunction with the second alternative of the second aspect, in a third implementation of the second aspect, when the radio resource management is to select a downlink CoMP measurement set, the management unit is further configured to:

Sorting the reference signal subframe arrival times of the plurality of cells, searching for the tth cell and the kth cell that satisfy the ITO A _t -TOA _k l< first preset threshold, and TO A _t is the tth cell Reference signal subframe arrival time, TOA _k is the reference signal subframe arrival time of the kth cell; determining that the transmission point corresponding to at least one of the tth to kth cells is the terminal downlink ComP measurement set The first preset threshold is smaller than the length of the current cyclic prefix of the base station.

With reference to the second optional aspect of the second aspect, in a fourth optional aspect of the second aspect, when the radio resource management assists the terminal to determine a determined time advance set of the multi-carrier aggregation CA, the management unit further includes :

Obtaining, by each of the plurality of cells, a time difference between the positioning reference signal PRS or the cell reference signal CRS; searching for satisfying - Δ PRS; - (TOA _k Δ Δ PRS _k ) l < second preset threshold i cell and kth cell, TOAi is the reference signal subframe arrival time of the i th cell, TOA _k is the reference signal subframe arrival time of the kth cell, and A PR _Sl is the i th cell and the serving cell transmission The time difference between the positioning reference signal PRS or the cell reference signal CRS, Δ PRSk is the time difference between the kth cell and the serving cell transmitting the positioning reference signal PRS or the cell reference signal CRS; when the i th cell and the kth cell are respectively at different frequencies When the uplink resource on the layer serves the terminal at the same time, the same uplink timing advance TA is adopted for the i-th cell and the k-th cell.

In conjunction with the second alternative of the second aspect, in the fifth alternative of the second aspect, when the radio resource management is the uplink high-power 4, the management unit further includes:

Obtaining, by each of the plurality of cells, a time difference between the positioning reference signal PRS or the cell reference signal CRS, acquiring an uplink timing advance TA of the terminal, and estimating the terminal according to the uplink transmit power of the terminal The uplink interference range is determined according to the uplink timing advance of the terminal, the uplink interference range of the terminal, and the uplink interference range, whether the distance from the terminal to each base station is smaller than the uplink interference range of the terminal, for example, the distance from the terminal to the base station of the cell i is smaller than the terminal. The uplink interference range indicates that HII is indicated by the uplink high interference in the X2 interface, and the base station of the cell i is notified that there is interference on the resources scheduled by the terminal. A third aspect, a method for supporting a base station to perform radio resource management, where the method includes: a reference signal arrival time difference in performing one or more positioning reference signal positioning measurement opportunities

The RSTD measurement result obtained after the RSTD measurement, where the RSTD measurement result is represented as a reference signal arrival time difference of a plurality of cell reference signal subframe arrival times or a plurality of cell relative positioning reference cell arrival times;

The RRC signaling is sent to the base station, and the RRC signaling includes: RSTD measurement score of one or more positioning reference signal positioning measurement opportunities.

A fourth aspect, a terminal, where the terminal includes:

a measuring unit, configured to perform an RSTD measurement result after completing a reference signal arrival time difference RSTD measurement in one or more positioning reference signal positioning measurement opportunities, where the RSTD measurement result is represented as a plurality of cell reference signal subframe arrival times or more The reference signal arrival time difference of the cell arrival time relative to the reference cell arrival time;

And a sending unit, configured to send, to the base station, RRC signaling, where the RRC signaling includes: one or more positioning reference signal positioning measurement opportunity RSTD measurement results.

Beneficial effect

The technical solution avoids the transmission delay of the serving base station to the positioning center of the service terminal in the traditional method, the calculation processing delay of the service terminal positioning center, the delay of the service terminal positioning center to the serving base station, and real-time wireless resource management. . DRAWINGS

1 is a flowchart of a method for managing a radio resource according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a base station according to an embodiment of the present invention;

3 is a flowchart of a method for supporting a base station to perform radio resource management according to an embodiment of the present invention; and FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention. detailed description

In order to make the objects, technical solutions and advantages of the present invention more clear, the following The present invention will be further described in detail. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

First, the implementation background of the specific implementation manner of the present invention is introduced. OTDOA is a method for supporting user positioning. OTDOA is a user positioning method specified by the standard. According to the standard, the RSTD and the arrival time can be obtained through the OTDOA (Time). Of Arrival, ΤΟΑ). In actual operation, the above Τ0Α is actually the reference signal sub-frame arrival time.

The cell is identified by a cell ID (identifier), and the cell ID has a cell physical layer ID and a cell global ID. A base station may include multiple cells, or may only include one cell. The macro base station is generally considered to include a plurality of cells, and the micro base station and the pico base station have a smaller coverage than the macro base station, and may also include a plurality of cells. The macro base station can also connect to the radio remote device through the optical fiber to form a cell split, and the radio remote device does not include the radio resource management unit. Base stations, such as macro base stations, micro base stations, and pico base stations, all include a wireless resource management unit. Communication between various base stations using the x2 interface.

The PRS signal is distinguished by the cell physical layer ID, and a signal that is orthogonal in the time domain or code domain is generated. The terminal distinguishes different cell signals according to different PRS signals.

A specific embodiment of the present invention provides a method for managing a radio resource, where the method is performed by a base station eNB, and the method is as shown in FIG.

S11. Receive radio resource control RRC signaling sent by the UE after completing a reference signal arrival time difference RSTD measurement in one or more positioning reference signal PRS positioning opportunities, where the RRC signaling includes: one or more PRS positioning opportunities The result of the RSTD measurement, the RSTD measurement result is represented as a plurality of cell reference signal subframe arrival time TOA or reference signal subframe arrival time difference RSTD of multiple cells;

Optionally, the foregoing RRC signaling may further include: a cell identifier corresponding to the RSTD measurement result; of course, in an actual situation, the cell identifier may not be included, because the base station may match the sequence of the location request sending to determine the RSTD measurement result. Community.

As the terminal and the serving cell maintain the downlink timing, the serving cell system frame number SFN is known, and the PLS subframe arrival time of the J service base station, that is, the downlink timing of the subframe corresponding to the PRS, may be obtained according to the OTDOA auxiliary message. However, the arrival time of the PRS subframe of the serving cell may also be similar to that of the neighbor cell, by receiving the PRS. The signal is correlated with the local PRS to obtain a more accurate arrival time of the serving cell PRS subframe. Therefore, the measured arrival time of each cell PRS subframe is a relative time difference of the downlink timing of the subframe corresponding to the PRS.

M cell reference signal subframe arrival time TOA, which can be expressed as TOAi, i=0, l, ..., Μ-1;

Μ - 1 cell reference signal subframe arrival time difference RSTD, which can be expressed as RSTDi, i=l, ..., Μ-1;

RSTD, = TOAi - TOAo, when the serving base station PRS subframe arrival time, the downlink timing of the subframe corresponding to the PRS, TO A. Zero, reporting RSTD is equivalent to reporting TOA. The following is reported as an example of TOA. Where TO A. It indicates that the positioning reference cell is also the serving cell of the UE.

S12. Perform radio resource management according to a reference signal subframe arrival time of multiple cells or a reference signal arrival time difference.

Since the reference signal subframe arrival time or difference of the plurality of cells is transmitted to the base station through RRC signaling, the base station can parse the RRC signaling. And performing related radio resource management operations according to the content of the signaling.

The method provided by the embodiment of the present invention directly sends the TOA or the RSTD to the serving base station by using the RRC signaling, and the base station directly performs the RRM management, so that the transmission delay from the UE transmission to the serving terminal positioning center is reduced, and the service terminal positioning center is calculated. Processing delay, the service terminal locates the delay from the center to the serving base station, so it has the advantage of small transmission delay.

The base station herein may include radio resource scheduling for managing multiple cells, which may be a macro base station, a micro base station, and a pico base station.

In addition, it should be noted that the technical solution of the embodiment of the present invention can perform RSTD measurement result transmission when one or more PRS positioning opportunities are completed, which further reduces the delay.

Optionally, the foregoing radio resource management includes any combination of the following: assisting the terminal to determine a downlink assisted multi-point transmission CoMP measurement set, and assisting the terminal to determine whether multiple cells of the multi-carrier aggregation CA are suitable for adopting the same uplink. The TA is advanced and the upstream high interference indication is determined. Of course, in actual situations, it is also possible to manage other radio resources, such as cell handover.

Optionally, when the radio resource management is to select a downlink CoMP measurement set, the implementation method of the S12 includes:

Sorting the arrival times of multiple cell reference signal sub-frames (this ordering can be from high to low, also It can be from low to high;), find the tth cell and the kth cell that satisfy ITOAt -TOAkl < first preset threshold T0A_TH, T0A _t is the reference signal subframe arrival time of the tth cell, TOA _k is a reference signal subframe arrival time of the kth cell; determining at least one of the tth to kth cells (of course, in actual cases, preferably all cells in the tth to kth cells) The transmission point is the UE downlink ComP measurement set, where TOA_TH may be smaller than the length of the current cyclic prefix of the base station.

It should be noted that, since the CoMP measurement set is selected only in multiple cells in the same frequency layer managed by the serving base station, when the CoMP measurement set is selected, the reference signal subframe arrival time of multiple cells is corresponding to multiple cells. The TOA of the transmission point. The plurality of cells may be a plurality of cells on the same frequency layer managed by the serving base station matched by the cell identifier.

The transmission point here refers to a macro base station and a radio remote device connected through an optical fiber, and can be a plurality of radio remote devices or one macro base station and multiple radio remote devices for the same macro station. The radio resource management unit is located at the macro base station.

Optionally, when the RRM is used to assist the terminal to determine whether multiple cells of the multi-carrier aggregation CA are suitable to use the same uplink advancement TA, the implementation method of the S12 specifically includes:

Obtaining, by each of the plurality of cells, a time difference between the positioning reference signal PRS or the cell reference signal CRS; transmitting, according to each of the plurality of cells, the positioning reference signal PRS or the cell reference signal The time difference of the CRS determines that the absolute value of the inter-cell propagation delay difference does not exceed the second preset threshold PD_TH, that is, ITAi - Δ PRSi - (TOA _k - Δ PRS _K ) I < PD_TH, and the determined cell is suitable for the same The upstream advancement TA, the second threshold can take a typical value of 16Ts, Ts = l / 307200s. The A PRSi is a time difference between the ith cell and the serving cell transmitting the positioning reference signal PRS or the cell reference signal CRS, and the A PRSk is a time difference between the kth cell and the serving cell transmitting the positioning reference signal PRS or the cell reference signal CRS.

It should be noted that, because the uplink advance group is selected in multiple cells in different frequency layers managed by the serving base station, the TOA may be a TOA of a transmission point corresponding to multiple cells; the multiple cells may be matched according to a cell identifier. The serving base station manages multiple cells on different frequency layers.

The plurality of cell sending devices may be different types of transmission points, including a macro base station Macro, a micro base station Pico, and a radio frequency remote RRH. Optionally, when the RRM performs the uplink high-interference indication Hi t , the implementation method of the S12 includes: obtaining a time difference between each positioning cell and the serving cell of the multiple cells to send the positioning reference signal PRS or the cell reference signal CRS; said terminal uplink time advance the TA; _[tau] [rho] the uplink transmission power of the UE, the default receiver sensitivity P _R, the UE estimates the uplink interference range ULJnterference- range, the amount is determined in advance and the UE according to the uplink interference range to be scheduled, and uplink time Whether the eNBi of the resource on the same frequency layer is in the uplink interference range of the UE, specifically includes:

Determining whether the uplink signal of the UE can reach the base station of the cell i, if yes, determining that the eNBi that the UE is to schedule resources on the same frequency layer is in the uplink interference range of the UE, and if not, determining that the UE is to schedule resources at the same frequency layer. The upper eNBi is not in the uplink interference range of the UE;

If the uplink interference range of the UE is in the uplink, the corresponding eNBi is notified through the uplink in the X2 interface, and the resources scheduled by the UE are interfered.

It should be noted that since HII is an X2 interface definition field, the TOA at the above HII is a TOA of a transmission point corresponding to a plurality of cells. The plurality of cells may be a plurality of cells managed by non-serving base stations matched according to cell identifiers.

It should be noted that, the method for determining whether the uplink signal of the UE can reach the base station of the cell i may be:

Judging (TA_ref/2 +ΤΟΑ ₀ +ΤΟΑ, - Δ PRSi ) xc <UL_Interference_ range -L _offset is established, if yes, it is judged that there is interference, that is, the UE uplink signal can reach the cell i base station, and is in the uplink interference range of the UE. If no, it is determined that there is no interference, that is, the UE uplink signal cannot reach the cell i base station, and is not in the UE uplink 4 no range; wherein UL_Interference_range indicates the UE interference range, L. _Ffset represents the offset margin (can be zero or a non-zero positive number), c represents the speed of light, and TA_ref is the advance time of the serving cell.

The transmitting device of the cell may be a different type of transmission point, including the macro base station Macro, the micro base station Micro, and the pico base station Pico, but does not include the radio remote control. Since the macro base station directly allocates the radio resource for the allocated resource, the X2 interface is not used to coordinate the resource. .

The embodiment of the invention further provides a base station, as shown in FIG. 2, the base station includes:

The receiving unit 21 is configured to: the receiving terminal completes one or more positioning reference signal positioning measurement opportunities Transmitting the radio resource control RRC signaling after the reference signal arrival time difference RSTD measurement, where the RRC signaling includes: one or more positioning RSD measurement results of the positioning signal positioning measurement opportunity, the RSTD measurement result being represented as multiple cells Reference signal subframe arrival time or reference signal subframe arrival time difference of multiple cell relative positioning reference cell arrival times, and reference signal subframe arrival time of multiple cells or reference signal of multiple cell relative positioning reference cell arrival time The frame arrival time difference is sent to the management unit 22;

The management unit 22 is configured to perform radio resource management according to a reference signal subframe arrival time of multiple cells or a reference signal subframe arrival time difference.

Optionally, the foregoing radio resource management includes any combination of the following: assisting the terminal to determine a downlink assisted multi-point transmission CoMP measurement set, and assisting the terminal to determine whether multiple cells of the multi-carrier aggregation CA are suitable for using the same The uplink advancement TA and the determination of the uplink high interference indication.

Optionally, the foregoing RRC signaling may further include:

The RSTD measurement results with the cell identifier corresponding to each '', zone'.

Optionally, when the radio resource management is to select a downlink CoMP measurement set, the management unit 22 further uses:

Sorting the plurality of cell reference signal subframe arrival times to find the tth cell and the kth cell that meet the first preset threshold of the ITOA _t- TOA _k k, and the TOA _t is the reference signal of the tth cell a frame arrival time, the TOA _k is a reference signal subframe arrival time of the kth cell; determining that the transmission point corresponding to the at least one of the tth to the kth cells is the UE downlink ComP measurement set, where the first The preset threshold is smaller than the length of the current cyclic prefix of the base station.

Optionally, when the radio resource management assists the terminal to determine the determined time advance set of the multi-carrier aggregation CA, the management unit 22 further includes:

Obtaining a time difference between each positioning cell and the serving cell of the multiple cells to send a positioning reference signal PRS or a cell reference signal CRS; searching for a condition that satisfies - Δ PRS _t _(TOA _k - Δ PRS _k )l<second preset threshold i cell and kth cell, TOAi is the reference signal subframe arrival time of the i th cell, TOA _k is the reference signal subframe arrival time of the kth cell, and A PRSi is the i th cell and the serving cell transmission location The time difference between the reference signal PRS or the cell reference signal CRS, A PRSk is the kth cell and the serving cell Sending a time difference between the positioning reference signal PRS or the cell reference signal CRS; when the i-th cell and the k-th cell respectively have uplink resources on different frequency layers serving the terminal simultaneously, then the i-th cell and the k-th Each cell uses the same uplink timing advance TA.

Optionally, when the radio resource management indicates the HII, the management unit 22 further includes: obtaining a time difference between each of the plurality of cells and the serving cell to send the positioning reference signal PRS or the cell reference signal CRS; Obtaining an uplink timing advance TA of the terminal, estimating an uplink interference range of the terminal according to an uplink transmit power of the terminal, and determining, according to an uplink timing advance, an uplink interference range, and an uplink interference range of the terminal Whether the distance of each base station is smaller than the uplink interference range of the terminal, for example, the distance from the terminal to the base station of the cell i is smaller than the uplink interference range of the terminal, and the UL HII is indicated by the uplink high interference in the X2 interface, and the base station of the cell i is notified to schedule the terminal. There is interference on the resources.

The base station provided by the embodiment of the present invention is directly sent to the base station by using the RRC signaling TOA or the RSTD, and the base station directly performs the RRM management, thereby reducing the transmission delay from the UE to the positioning center of the service terminal, and calculating the processing time of the service terminal positioning center. Delay, the service terminal locates the delay from the center to the serving base station, so it has the advantage of small transmission delay.

The embodiment of the invention further provides a method for supporting a base station to perform radio resource management. The method is as shown in FIG. 3, and includes:

531. Perform an RSTD measurement result obtained after a reference signal arrival time difference RSTD measurement in one or more positioning reference signal positioning measurement opportunities, where the RSTD measurement result is represented as a plurality of cell reference signal subframe arrival times or a plurality of cells relative to each other. Locating the reference signal arrival time difference of the reference cell arrival time;

532. Send RRC signaling to the base station, where the RRC signaling includes: RSTD measurement result of positioning the measurement opportunity by one or more positioning reference signals.

The method provided by the embodiment of the present invention sends RRC signaling to the base station, so that the base station performs RRM management through TO A or RSTD of RRC signaling, which reduces the transmission delay from the UE transmission to the serving terminal positioning center, and the service terminal locates. The central processing delay, the service terminal locates the delay from the center to the serving base station, so it has the advantage of small transmission delay. The embodiment of the present invention further provides a terminal. As shown in FIG. 4, the terminal includes: a measuring unit 41, and an RSTD obtained after completing a reference signal arrival time difference RSTD measurement in one or more positioning reference signal positioning measurement opportunities. As a result of the measurement, the RSTD measurement result is represented as a reference signal arrival time difference of a plurality of cell reference signal subframe arrival times or a plurality of cell relative positioning reference cell arrival times;

The sending unit 42 is configured to send RRC signaling to the base station, where the RRC signaling includes: one or more positioning reference signal positioning measurement opportunity RSTD measurement scores.

Optionally, the foregoing terminal further includes:

The receiving indication unit 43 is configured to control the sending unit 32 to send RRC signaling by using a quality of service QoS level indication or a direct indication in the positioning request when the received positioning request is based on the radio resource management service.

The terminal provided by the embodiment of the present invention sends RRC signaling to the base station, so that the base station performs RRM management through TO A or RSTD of RRC signaling, which reduces the transmission delay from the UE transmission to the serving terminal positioning center, and the service terminal locates. The central processing delay, the service terminal locates the delay from the center to the serving base station, so it has the advantage of small transmission delay. In the above unit and system embodiment, each module or unit included is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be realized; in addition, the specific name of each functional module is also They are only used to facilitate mutual differentiation and are not intended to limit the scope of the present invention.

Those skilled in the art can understand that all or part of the technical solutions provided by the embodiments of the present invention can be completed by using related hardware of program instructions. For example, it can be done by computer running. The program can be stored on a readable storage medium such as a random access memory, a magnetic disk, an optical disk, or the like.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

claims

1. A wireless resource management method, characterized in that the method includes:

The receiving terminal sends radio resource control RRC signaling after completing the reference signal arrival time difference RSTD measurement in one or more positioning reference signal positioning measurement opportunities, where the RRC signaling includes: one or more positioning reference signal positioning measurement opportunities. RSTD measurement result, the RSTD measurement result is expressed as the reference signal arrival time TOA of multiple cell reference signal subframes or the reference signal arrival time difference of the relative positioning reference cell arrival time of multiple cells;

Radio resource management is performed based on the reference signal subframe arrival time or reference signal arrival time difference of multiple cells.

2. The method according to claim 1, wherein the wireless resource management includes any combination of the following: assisting the terminal in determining a downlink assisted multipoint transmission CoMP measurement set, assisting the terminal in determining multi-carrier aggregation Whether multiple cells of the CA are suitable to use the same uplink advance TA, and determine the uplink high interference indication HII.

3. The method according to claim 1, wherein the RRC signaling further includes: the cell identifier and frequency layer information corresponding to the RSTD measurement result and each cell.

4. The method according to any one of claims 1 to 3, characterized in that, when radio resource management is to assist the terminal in determining a downlink CoMP measurement set, the reference signal subframe arrival time of multiple cells is Wireless resource management includes:

Sort the reference signal subframe arrival times of the multiple cells, and find the t-th cell and k-th cell that satisfy ITO A _t -TOA _k l < the first preset threshold, TO A _t is the t-th cell The reference signal subframe arrival time of , TOA _k is the reference signal subframe arrival time of the kth cell; then it is determined that the transmission point corresponding to at least one cell among the tth to kth cells is the UE downlink ComP measurement set , where the first preset threshold is less than the length of the current cyclic prefix of the base station.

5. The method according to any one of claims 1 to 3, characterized in that, when radio resource management is to assist the terminal in determining the determination time advance set of multi-carrier aggregation CA, the reference according to multiple cells Wireless resource management based on signal arrival time difference includes: Obtain the time difference between the positioning reference signal PRS or the cell reference signal CRS sent by each positioning cell and the serving cell in the plurality of cells;

Find the i-th cell and k-th cell that satisfy ITOAi- Δ PRS; -(TOA _k - Δ PRS _k )l < the second preset threshold, TOAi is the reference signal subframe arrival time of the i-th cell, TOA _k is the reference signal subframe arrival time of the k-th cell, A PRSi is the time difference between the i-th cell and the serving cell sending the positioning reference signal PRS or cell reference signal CRS, A PRS _k is the k-th cell and the serving cell sending the positioning reference The time difference of the signal PRS or the cell reference signal CRS; when the 1st cell and the kth cell have uplink resources on different frequency layers to serve the terminal at the same time, then the ith cell and the kth cell are used The same uplink time advance TA.

6. The method according to any one of claims 1 to 3, characterized in that when the radio resource management is an uplink high interference indication HII, the reference signal subframe arrival time or reference signal according to multiple cells is Wireless resource management based on arrival time difference includes:

Obtain the time difference between each positioning cell and the serving cell in multiple cells sending the positioning reference signal PRS or cell reference signal CRS;

Obtain the uplink time advance TA of the terminal;

According to the uplink transmit power of the terminal, the uplink interference range of the terminal is estimated, and based on the uplink time advance of the terminal and the uplink interference range of the terminal, it is determined whether the distance from the terminal to each base station is smaller than the uplink interference range of the terminal, such as If the distance between the terminal and the base station of cell i is less than the uplink interference range of the terminal, the uplink high interference indication HII in the X2 interface is used to notify the base station of cell i that there is interference on the resources scheduled by the terminal.

7. A base station, characterized in that, the base station includes:

The receiving unit is configured to receive the radio resource control RRC signaling sent by the terminal after completing the reference signal arrival time difference RSTD measurement in one or more positioning reference signal positioning measurement opportunities, where the RRC signaling includes: one or more positioning reference signals The RSTD measurement result of the positioning measurement opportunity, the RSTD measurement result is expressed as the reference signal subframe arrival time of multiple cells or the reference signal arrival time difference of the relative positioning reference cell arrival time of multiple cells, and the reference signal of the multiple cells is The signal subframe arrival time or reference signal arrival time difference is sent to the management unit; A management unit configured to perform radio resource management based on reference signal subframe arrival times or reference signal arrival time differences of multiple cells.

8. The base station according to claim 7, wherein the wireless resource management includes any combination of the following: assisting the terminal in determining a downlink assisted multipoint transmission CoMP measurement set, assisting the terminal in determining multi-carrier aggregation Whether multiple cells of the CA are suitable to use the same uplink advance TA and determine the uplink high interference indication HΠ.

9. The base station according to claim 7, wherein the RRC signaling further includes: the cell identifier and frequency layer information corresponding to the RSTD measurement result and each cell.

10. The base station according to claim 9, characterized in that when radio resource management is to select a downlink CoMP measurement set, the management unit is further configured to:

Sort the reference signal subframe arrival times of the multiple cells, and find the t-th cell and k-th cell that satisfy ITO A _t -TOA _k l < the first preset threshold, TO A _t is the t-th cell The reference signal subframe arrival time of , TOA _k is the reference signal subframe arrival time of the kth cell; then it is determined that the transmission point corresponding to at least one cell among the tth to kth cells is the terminal downlink ComP measurement set , where the first preset threshold is less than the length of the current cyclic prefix of the base station.

11. The base station according to claim 9, wherein when radio resource management assists the terminal in determining the determination time advance set of multi-carrier aggregation CA, the management unit further includes:

Obtain the time difference between each positioning cell and the serving cell in the plurality of cells to send the positioning reference signal PRS or cell reference signal CRS; find the first value that satisfies ITOAi - Δ PRSi _(TOA _k - Δ PRS _k )l < the second preset threshold The i cell and the k-th cell, TOAi is the reference signal subframe arrival time of the i-th cell, TOA _k is the reference signal subframe arrival time of the k-th cell, A PRSi is the positioning sent by the i-th cell and the serving cell The time difference between the reference signal PRS or the cell reference signal CRS, Λ PRSk is the time difference between the k-th cell and the serving cell sending the positioning reference signal PRS or the cell reference signal CRS; when the i-th cell and the k-th cell are in different frequency layers respectively When the uplink resources on the UE serve the terminal at the same time, the same uplink time advance TA is used for the i-th cell and the k-th cell.

12. The base station according to claim 9, characterized in that when the radio resource management is an uplink high interference indication H1, the management unit further includes: Obtain the time difference between the positioning reference signal PRS or the cell reference signal CRS sent by each positioning cell and the serving cell in the plurality of cells; obtain the uplink time advance TA of the terminal, and estimate the terminal according to the uplink transmission power of the terminal The uplink interference range of the terminal is judged according to the uplink time advance of the terminal and the uplink interference range of the terminal and the uplink interference range. Whether the distance from the terminal to each base station is smaller than the uplink interference range of the terminal. For example, the distance from the terminal to the base station of cell i is smaller than the terminal. The uplink interference range is, then the base station of cell i is notified that there is interference on the resources scheduled by the terminal through the uplink high interference indication HII in the X2 interface.

13. A method for supporting wireless resource management by a base station, characterized in that the method includes: reference signal arrival time difference in completing one or more positioning reference signal positioning measurement opportunities

The RSTD measurement result obtained after the RSTD measurement, the RSTD measurement result is expressed as the reference signal arrival time difference between multiple cell reference signal subframe arrival times or multiple cell relative positioning reference cell arrival times;

Send RRC signaling to the base station, where the RRC signaling includes: RSTD measurement results of one or more positioning reference signal positioning measurement opportunities.

14. A terminal, characterized in that, the terminal includes:

The measurement unit is used to obtain the RSTD measurement result after completing the reference signal arrival time difference RSTD measurement in one or more positioning reference signal positioning measurement opportunities. The RSTD measurement result is expressed as multiple cell reference signal subframe arrival times or The reference signal arrival time difference of the relative positioning reference cell arrival time of multiple cells;

A sending unit, configured to send RRC signaling to the base station, where the RRC signaling includes: RSTD measurement results of one or more positioning reference signal positioning measurement opportunities.