CN109756923B

CN109756923B - Mobility management method, device and system

Info

Publication number: CN109756923B
Application number: CN201711064952.XA
Authority: CN
Inventors: 戴刚; 杨铮杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-11-02
Filing date: 2017-11-02
Publication date: 2021-06-22
Anticipated expiration: 2037-11-02
Also published as: CN109756923A

Abstract

The application discloses a mobility management method, a mobility management device and a mobility management system, and belongs to the field of communication. The method comprises the following steps: the method comprises the steps that a BTS receives an uplink receiving signal, wherein the uplink receiving signal comprises TSC sent by a first MS; the BTS calculates an uplink receiving level of the first MS according to the uplink receiving signal and the TSC corresponding to the first MS; the BTS reports the uplink receiving level of the first MS to the BSC, and the BSC receives the uplink receiving level of the first mobile station MS reported by at least one BTS, wherein each uplink receiving level corresponds to a cell; the BSC determines the signal quality of each cell at the position of the first MS according to the uplink receiving level of the first MS; and the BSC carries out mobility management on the first MS according to the signal quality of each cell at the position of the first MS. According to the method and the device, the uplink receiving level is replaced by the downlink receiving level under the condition of the same frequency interference, so that the effect of the mobility management of the MS is achieved.

Description

Mobility management method, device and system

Technical Field

The present application relates to the field of communications, and in particular, to a mobility management method, apparatus, and system.

Background

For mobile communication networks, air interface resources are the most valuable resources for operators. The Global System for Mobile communications (GSM) occupies the most precious spectrum. Reuse of the spectrum resources occupied by GSM to Long-Term Evolution (LTE) is a common trend in the development of global mobile networks.

In a traditional GSM cellular networking method, a basic repeating unit uses 4 × 3 networking, that is, 4 base stations, each base station provides 3 cells, and adjacent cells use different frequency points. The terminal will continuously monitor the downlink receiving level (also called downlink receiving power) of each cell at the location, and then be used in the decision process of cell reselection, cell handover, etc. Such as: when monitoring that the downlink receiving level of the cell 1 is better than the downlink receiving level of the cell 2 and the cell 2 is the current resident cell, the terminal can select to switch to the cell 1 for resident.

However, in order to reduce the spectrum resources occupied by GSM, if a more compact networking method is adopted, the basic repeating unit may adopt 2 × 3 networking, or even 1 × 3 networking. At this time, when the terminal monitors a cell signal at the location, there may exist a plurality of cells using the same frequency point a. Due to the superposition of co-frequency interference, the downlink receiving level of the frequency point a received by the terminal is the superposition of co-frequency signals of a plurality of adjacent cells, so that the downlink measurement of the terminal cannot represent the strength of the downlink receiving level of each cell, and the terminal cannot reselect a proper cell and cannot be successfully switched to a target cell.

Disclosure of Invention

The embodiment of the invention provides a mobility management method, a mobility management device and a mobility management system, which can solve the problem that the downlink measurement of a terminal cannot represent the downlink receiving level strength of each cell in a tight multiplexing scene. The technical scheme is as follows:

according to a first aspect of the present application, there is provided a mobility management method, the method comprising:

a Base Station (BTS) receives an uplink received signal, where the uplink received signal includes a Training Sequence Code (TSC) sent by a first Mobile Station (MS);

the BTS calculates an uplink receiving level of the first MS according to the uplink receiving signal and the TSC corresponding to the first MS;

the BTS reports the uplink reception level of the first MS to a Base Station Controller (BSC), and the uplink reception level is used for the BSC to perform mobility management on the first MS.

In the embodiment, the uplink receiving level of the first MS is measured by the BTS, and the uplink receiving level of the first MS is equivalent to the downlink receiving level of the first MS according to channel reciprocity, so that the mobility management is performed on the first MS according to the uplink receiving level of the first MS measured by each BTS, and the problem that the downlink receiving level of each cell cannot be represented by the downlink measurement of the terminal in a BCCH tight multiplexing scenario of a GSM system is solved; the effect that the uplink receiving level of each MS can still be separated under the condition of the existence of the same frequency interference, and the mobility management of the MS is realized by replacing the downlink receiving level with the uplink receiving level is achieved.

In a first possible implementation manner of the first aspect, the calculating, by the BTS, an uplink reception level of the first MS according to the uplink reception signal and the TSC corresponding to the MS includes:

determining a first TSC corresponding to the first MS;

performing sliding correlation calculation on the uplink receiving signal and the first TSC to obtain a sliding correlation value with the maximum energy;

and calculating the uplink receiving level of the first MS according to the sliding correlation value with the maximum energy.

The mobility management method provided in this embodiment performs sliding correlation calculation according to the TCS and the uplink received signal, so that a relatively accurate uplink received level can be estimated for an MS with a strong signal, and the overall calculation amount is small.

In a second possible implementation manner of the first aspect, the calculating, by the BTS, an uplink reception level of the MS according to the uplink reception signal and the TSC corresponding to the MS includes:

determining n MSs with the strongest uplink receiving level in the uplink receiving signal, wherein the n MSs comprise the first MS, and n is a positive integer;

performing joint channel estimation on the n MSs with the strongest uplink receiving level to obtain channel factors of the n MSs;

and respectively calculating the uplink receiving level of each MS according to the channel factors of the n MSs.

The mobility management method provided by this embodiment can relatively accurately estimate the uplink reception level of each MS through joint channel estimation, and also save the calculation amount.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the determining the n MSs with the strongest uplink reception level in the uplink received signal includes:

calculating the signal-to-noise ratio (SNR) of each MS in the uplink received signal; determining the signal-to-noise ratio SNR as n MSs with the strongest uplink receiving level from the MSs with the top n bits ordered from high to low;

or,

calculating the MSE of each MS in the uplink received signal; and determining the MSE from low to high as the n MSs with the strongest uplink receiving level.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, after the respectively calculating the uplink receive level of each MS according to the channel factors of the n MSs, the method further includes:

and respectively calculating m groups of channel factors of the n MSs at adjacent m moments, aligning and filtering the m groups of channel factors to obtain the filtered channel factors of the n MSs.

In this embodiment, the channel factors of n MSs with the strongest uplink receive levels are calculated first, and then m groups of "channel factors of Top n MSs" are calculated respectively according to m adjacent times to perform alignment and filtering, so as to obtain the filtered channel factors of n MSs, so that the MSs with weaker uplink receive levels at a certain time can be estimated more accurately, and a more accurate uplink receive level of the MS is obtained through a filtering manner.

According to a second aspect of the present application, there is provided a mobility management method, the method comprising:

a BSC receives uplink receiving levels of a first MS reported by at least one BTS, wherein each uplink receiving level corresponds to a cell;

the BSC determines the signal quality of each cell at the position of the first MS according to the uplink receiving level of the first MS;

and the BSC carries out mobility management on the first MS according to the signal quality of each cell where the first MS is located.

In a first possible implementation manner of the second aspect, the performing mobility management on the first MS according to the signal quality of each cell where the first MS is located includes:

and according to the signal quality of each cell where the first MS is located, determining that the signal quality difference of the first cell and the signal quality of the second cell exceeds a preset threshold, and when the first cell is the resident cell of the first MS, generating a switching instruction, wherein the switching instruction is used for instructing the first MS to switch from the first cell to the second cell.

The handover command is sent to the first MS through the BTS.

According to a third aspect of the present application, there is provided a mobility management apparatus, the apparatus comprising: at least one module; the at least one module is configured to implement the mobility management method as provided in the first aspect above or any possible implementation manner of the first aspect.

According to a fourth aspect of the present application, there is provided a mobility management apparatus, the apparatus comprising: at least one module; the at least one module is configured to implement the mobility management method as provided by the second aspect or any possible implementation manner of the second aspect.

According to a fifth aspect of the present application, there is provided a base station comprising: a processor and a memory, the memory storing at least one instruction, the processor executing the at least one instruction for implementing a mobility management method as provided by the first aspect and various possible implementations of the first aspect above.

According to a sixth aspect of the present application, there is provided a base station controller comprising: a processor and a memory, the memory storing at least one instruction, the processor executing the at least one instruction for implementing the mobility management method as provided by the second aspect above and the various possible implementations of the second aspect.

According to a seventh aspect of the present application, there is provided a computer-readable storage medium storing at least one instruction which, when executed by a processor, is configured to implement the mobility management method as provided by the first aspect and the various possible implementations of the first aspect.

According to an eighth aspect of the present application, there is provided a computer-readable storage medium storing at least one instruction which, when executed by a processor, is configured to implement the mobility management method as provided by the second aspect and the various possible implementations of the second aspect.

According to a ninth aspect of the present application, there is provided a mobile communication system, the system comprising a base station BTS and a base station controller BSC;

the BTS comprises mobility management means as provided in various possible implementations of the third aspect and the third aspect, the BSC comprises mobility management means as provided in various possible implementations of the fourth aspect and the fourth aspect; alternatively, the BTS is a base station as in the fifth aspect, and the BSC comprises a base station controller as in the sixth aspect.

According to a tenth aspect of the present application, there is provided a chip comprising programmable logic circuitry and/or program instructions for implementing, when the chip is run, the mobility management method as provided above in the first aspect and in various possible implementations of the first aspect.

According to an eleventh aspect of the present application, there is provided a chip comprising programmable logic circuits and/or program instructions for implementing, when the chip is run, the mobility management method as provided above for the second aspect and the various possible implementations of the second aspect.

Drawings

Fig. 1 is a schematic diagram illustrating a downlink measurement method in a BCCH tight multiplexing scenario in the related art;

fig. 2 is a block diagram of a mobile communication system according to an exemplary embodiment of the present invention;

fig. 3 is a schematic diagram of a1 x 3 networking mode in BCCH tight multiplex networking according to an exemplary embodiment of the present invention;

fig. 4 is a flowchart of a mobility management method provided by an exemplary embodiment of the present invention;

fig. 5 is a flowchart of a mobility management method provided by another exemplary embodiment of the present invention;

fig. 6 is a schematic diagram of a calculation process of a mobility management method according to an exemplary embodiment of the present invention;

fig. 7 is a flowchart of a mobility management method according to another exemplary embodiment of the present invention;

fig. 8 is a schematic diagram of a calculation process of a mobility management method according to another exemplary embodiment of the present invention;

fig. 9 is a schematic diagram of a BTS provided by an exemplary embodiment of the present invention;

fig. 10 is a schematic structural diagram of a BSC provided in an exemplary embodiment of the present invention;

fig. 11 is a schematic structural diagram of a mobility management apparatus according to an exemplary embodiment of the present invention;

fig. 12 is a schematic structural diagram of a mobility management apparatus according to an exemplary embodiment of the present invention.

Detailed Description

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

When measuring the downlink reception level, the terminal mainly measures a Broadcast Control Channel (BCCH). Under the loose multiplexing scene of 4 x 3 networking, the downlink measurement of the terminal can more accurately measure the actual adjacent cell level; however, in a tight multiplexing scenario, due to the superposition of co-channel interference, especially when the neighboring cell and the serving cell use the same frequency point, the measurement result has a large error.

As shown in fig. 1, at the location of the terminal 01, the BCCH has a plurality of co-frequency neighboring cells with close distances, and assuming that the BCCH frequency point of the serving cell is f0, two neighboring cells with close distances are also used as the frequency point f 0. The BCCH of these three cells achieves that the signal strength of terminal 01 is substantially the same, and then the cell signal measured by terminal 01 at f0 is the superposition of the signals of these 3 cells and other cells with f0 frequency points that are far away. Since the cell signals all adopt the f0 frequency point, the average of the first downlink receiving level of the serving cell measured by the terminal 01 and the second downlink receiving level of the neighboring cell is the same, and the terminal 01 cannot distinguish the downlink receiving levels of the serving cell and the neighboring cell, which results in failure of downlink measurement.

Therefore, the present application provides a technical solution for mobility management, which can be used to solve the above technical problems.

Referring to fig. 2, a block diagram of a mobile communication system according to an exemplary embodiment of the present invention is shown. The mobile communication system may be a GSM system. The mobile communication system includes: BSC120, BTS140, and MS 160.

The BSC120 is a network element used by the GSM system for BTS management, and the BSC120 needs to be responsible for cell handover, power control and other services. One BSC may manage tens or even hundreds of BTSs 140, and each BSC120 may be responsible for one area of a city.

The BSC120 may be connected to one or more BTSs 140. Illustratively, the BSC120 is connected to the BTS140 by an optical cable.

The BTS140 is an access network device in the GSM system, and there is a physical interface between the BTS140 and the BSC120, and an air interface between the BTS140 and the MS 160. One BTS140 typically provides three cells, each employing a different frequency bin. Each cell may provide mobile communication services to at least one MS 160.

The MS160 is a mobile device used by a user.

Since the current GSM system is compatible with other mobile communication systems, the above three network elements and devices have other names in the actual communication system, which is not limited in the embodiments of the present application.

Optionally, the GSM system adopts a BCCH tight multiplexing networking format. The BCCH compact multiplex networking comprises the following steps: 1 base station 3 cell is any one of the scene of repeating unit networking, 2 base station 3 cell is any one of the scene of repeating unit networking and O-shaped networking. Fig. 3 illustrates a cell diagram of 1 bs by 3 cells as a repeating unit for networking. Each base station provides three cells, and the BCCH channels of the three cells respectively adopt a frequency point A1, a frequency point A2 and a frequency point A3; and covering and networking by taking 1 base station and 3 cells as repeating units to realize full coverage of a target area.

Fig. 4 is a flowchart of a mobility management method according to an exemplary embodiment of the present invention. The present embodiment is exemplified by applying the method to the mobile communication system shown in fig. 2. The method comprises the following steps:

step 401, a first MS sends an uplink sending signal;

the uplink transmission signal may be a Burst (Burst).

In a GSM system, a radio carrier is modulated by a data stream called a Burst (Burst) in one time slot. A burst sequence consists of a useful part comprising the coded data to be transmitted, the training sequence TSC and the tail bits, and a guard part which does not transmit information and which serves to prevent interference between adjacent burst sequences.

Wherein each MS has a respective TSC, and the TSC is carried on the middle 26 bits of the uplink Burst transmitted by the MS.

Step 402, a BTS receives an uplink receiving signal, wherein the uplink receiving signal comprises TSC sent by a first MS;

the BTS receives an uplink received signal that includes bursts transmitted by one or more MSs and noise signals. The uplink receiving signal includes an uplink Burst sent by the first MS, that is, the uplink receiving signal includes a TSC sent by the first MS.

Step 403, the BTS calculates the uplink receiving level of the first MS according to the uplink receiving signal and the TSC corresponding to the first MS;

and the BTS calculates the correlation degree according to the uplink receiving signal and the TSC corresponding to the first MS. And calculating the uplink receiving level of the first MS according to the correlation degree of the two.

The uplink reception level of the first MS measured by the BTS is approximately equal to the downlink reception level measured by the first MS, according to channel reciprocity. The reception level may also be referred to as reception power.

It should be noted that the BTS in this step may be one or more, such as at least two BTSs.

Step 404, the BTS reports the uplink receiving level of the first MS to the BSC;

each BTS knows only the uplink reception level of the first MS measured by itself and does not know the uplink reception level of the first MS measured by the other BTSs.

Therefore, after the uplink receiving level of the first MS is obtained by measurement, each BTS reports the uplink receiving level of the first MS obtained by measurement to the BSC.

Step 405, the BSC receives uplink receiving levels of the first MS reported by at least one BTS, each uplink receiving level corresponding to a cell;

the BSC may receive uplink receive levels of the first MS reported by one or more BTSs, each uplink receive level being equivalent to a downlink receive level of the first MS with respect to the BTS.

Optionally, each uplink reception level corresponds to one cell, and/or each uplink reception level corresponds to one BTS.

Step 406, the BSC determines the signal quality of each cell where the first MS is located according to the uplink receiving level of the first MS;

step 407, the BSC performs mobility management on the first MS according to the signal quality of each cell where the first MS is located.

The mobility management includes: cell reselection and/or cell handover.

Optionally, the BSC determines, according to the signal quality of each cell where the first MS is located, that the magnitude of the difference between the signal quality of the first cell and the signal quality of the second cell exceeds a predetermined threshold, and when the first cell is a camping cell of the first MS, generates a handover instruction, where the handover instruction is used to instruct the first MS to handover from the first cell to the second cell.

Alternatively, the BSC sends a handover command to the first MS via the BTS.

In summary, in the mobility management method provided in this embodiment, the BTS measures the uplink receiving level of the first MS, and the uplink receiving level of the first MS is equivalent to the downlink receiving level of the first MS according to channel reciprocity, so that mobility management is performed on the first MS according to the uplink receiving level of the first MS measured by each BTS, and the problem that the downlink receiving level of each cell cannot be represented by downlink measurement of the terminal in a BCCH tight multiplexing scenario of a GSM system is solved; the effect that the uplink receiving level of each MS can still be separated under the condition of the existence of the same frequency interference, and the mobility management of the MS is realized by replacing the downlink receiving level with the uplink receiving level is achieved.

In an alternative embodiment, the above step 403 may alternatively be implemented as the following steps 403a-403c, as shown in FIG. 5:

step 403a, determining a first TSC corresponding to the first MS;

the BTS knows a first TSC corresponding to the first MS in advance. Suppose the TSC sequence of the kth user is T_k(i) I is 0,1, …, L. Optionally, L ═ 10.

Step 403b, performing sliding correlation calculation on the uplink received signal and the first TSC to obtain a sliding correlation value with the maximum energy;

let r (i) be the uplink received signal, i ═ 0,1, …, n. The uplink received signal includes uplink TSCs transmitted by the n MSs and a noise signal. In order to separate the TSCs of the n MSs from the uplink received signal, the BTS first performs sliding correlation between the TSC of each TSC and the TSC segment of the uplink received signal, and the sliding correlation expression is as follows:

at h_k(n) (n is 0,1, …,10), a sliding correlation value in which the window length with the largest energy is L +1 is taken as an output. Optionally, L +1 ═ 11. h is_k(n) represents a sliding correlation value, and k represents a k-th user. i represents any one of L TSC sequences, and optionally, the value range of i is 0-10; j represents the calculation length of the sliding correlation, and optionally, the value range of j is 0-15, and 16 bits are total.

And the BTS calculates a sliding correlation value with the maximum energy in the uplink received signal according to the first TSC corresponding to the first MS, and the sliding correlation value is used as the sliding correlation value of the first MS.

And step 403c, calculating to obtain the uplink receiving level of the first MS according to the sliding correlation value with the largest energy.

And the BTS calculates the uplink receiving level of the first MS according to the following formula according to the first TSC corresponding to the first MS.

P_kIs the uplink reception level of the first MS, and k represents that the first MS is the kth MS. Optionally, L ═ 10.

In summary, the mobility management method provided in this embodiment can estimate a relatively accurate uplink reception level for an MS with a strong signal by performing sliding correlation calculation according to the TCS and the uplink reception signal, and has an effect of small overall calculation amount.

In a specific example, as shown in fig. 6, after receiving an uplink received signal, the BTS performs sliding correlation calculation on the TSC1 of the first MS to obtain a sliding correlation value 1 with the maximum energy, and then calculates a first uplink received level P1 of the first MS according to the sliding correlation value 1; the BTS performs sliding correlation calculation on the TSC2 of the second MS to obtain a sliding correlation value 2 with the maximum energy, and then calculates a second uplink receiving level P2 of the second MS according to the sliding correlation value 2; and the BTS performs sliding correlation calculation on the TSC2 of the third MS to obtain a sliding correlation value 3 with the maximum energy, and then calculates a third uplink receiving level P3 of the third MS according to the sliding correlation value 3.

In another alternative embodiment, the above step 403 may alternatively be implemented as the following steps 4031-40,4, as shown in fig. 7:

step 4031, determine n MSs with the strongest uplink reception level in the uplink reception signal, where the n MSs include a first MS and n is a positive integer;

alternatively, this step may be implemented in any one of the following three ways:

first, the BTS calculates a Signal-to-Noise Ratio (SNR) of each MS in an uplink received Signal; and determining the MSs with the highest uplink receiving level from the MSs with the SNR ranked in the top n bits from high to low.

Secondly, the BTS calculates the Mean Squared Error (MSE) of each MS in the uplink received signal; and determining MSE (mean square error) of the MSEs with the first n bits in sequence from low to high as n MSs with the strongest uplink receiving level.

Thirdly, according to the calculation method shown in fig. 5, n MSs with the strongest uplink reception level are calculated.

Illustratively, taking the second calculation method as an example, it is assumed that the uplink received signal r (k) of the BTS has the following relationship with the uplink transmitted signal a (k) of the first MS and the noise v (k):

r(k)＝Ha(k)+v(k)

where k denotes that the first MS is the kth MS and H is the channel matrix.

The MSE is obtained according to the Minimum Mean Square Error (MMSE) criterion as:

wherein,

d is the group delay of MMSE filter;

R_rr＝E[r(k)r^H(k)]

wherein, the transmitting signal a (k) is the TSC, W of the kth user_dFor MMSE filter coefficients, Rrr is the autocorrelation function of the uplink received signal, R_r，aFor the cross-correlation function of the uplink transmit signal and the uplink receive signal, H in the upper right corner represents the conjugate transpose. According to the formula, MSE of each MS can be obtained, and n MSs with the minimum MSE are taken as TOPs_nAnd the MS with the stronger uplink received signal.

Step 4032, carry on the joint channel estimation to n MSs with strongest receiving level of up run, receive the channel factor of n MSs;

the TSC is carried in the middle position of the uplink Burst sent by the MS to the BTS and occupies 26 bits.

For a single antenna transmit single antenna receive (SISO) system, the uplink received signal samples r of the TSC at time t_t(k) Can be expressed as:

r_t＝A_th+n_t

wherein r is_t＝[r_t(L) r_t(L+1) … r_t(N-1)]^TIndicating that at time T, the uplink received signal on the antenna of the BTS, and the T in the upper right corner represents the transpose matrix.

Suppose that:

is an (N-L) × (L +1) -dimensional matrix formed by training sequence codes, c_tRepresenting a training sequence code. Typically, the midamble code c_tThe length N is 26 and the channel factor length L is 4, the dimension of the matrix formed by the midamble codes is 22 × 5.

h＝[h[0] h[1] … h[L]]Denotes the channel factor, n_t＝[n_t[L] n_t[L+1] … n_t[N-1]]^TWhich represents the sampling of Additive White Gaussian Noise (AWGN) in the received signal.

For a multi-user reception system, the sampling of the uplink received signal of the TSC may be expressed as:

r’_t＝A’_th'+n_t'

taking a two-antenna receiving system as an example,

representing the received signals on two antennas;

in A_t,0，A_t,1By a first MS and a second MS, respectivelyTraining a matrix formed by sequence codes;

representing the channel factor of two users of the two antennas,

representing the noise on both antennas.

Similar to a single antenna, the expression of a two-user two-antenna receiving system can be obtained as follows:

wherein,

the channel factors of n MSs with the strongest uplink reception level of TOPn can also be obtained by the above formula.

Step 4033, according to the channel factors of n MSs, the uplink receiving level of each MS is calculated respectively;

P_kIs the uplink reception level of the first MS, k represents that the first MS is the kth MS, h_k(i) Is the channel factor of the first MS. Optionally, L ═ 10.

Step 4034, the channel factors of m groups of n MSs obtained by respectively calculating the m adjacent time instants are aligned and filtered, so as to obtain the filtered channel factors of the n MSs.

Since each MS experiences fading and Discontinuous Transmission (DTX) during Transmission, the Top n MSs with stronger signals calculated at different receiving time may be from different users. When the BTS respectively calculates and obtains m groups of channel factors of the MS with stronger signals at m adjacent receiving moments, filtering the channel factors calculated by the same MS in different times of Top n to obtain the channel factor filtered by the MS. Optionally, the first MS is included in the n MSs.

Optionally, step 4034 is an optional step, and fig. 8 illustrates the calculation principles of steps 4031-4034.

In summary, in the mobility management method provided in this embodiment, the channel factors of n MSs with the strongest uplink receive levels are calculated first, and then m groups of "channel factors of Top n MSs" are calculated according to m adjacent times to perform alignment and filtering, so as to obtain the filtered channel factors of n MSs, so that an MS with a weaker uplink receive level at a certain time can be estimated more accurately, and a more accurate uplink receive level of the MS is obtained through a filtering manner.

In the following, embodiments of the apparatus of the present application are described, and for parts of the embodiments of the apparatus not described in detail, reference is made to the details of the above-described embodiments of the method.

Referring to fig. 9, a block diagram of a BTS provided in an embodiment of the present application is shown. The BTS comprises: a processor 910, a memory 920, and a communication interface 930.

The processor 910 is connected to the memory 920 and the communication interface 930 through a bus, respectively.

Communication interface 930 is used to enable communication with other network elements.

Processor 910 includes one or more processing cores. The processor 910 implements the functions of the BTS in the various method embodiments described above by running an operating system or application program module.

Optionally, memory 920 may store an operating system 922, and application modules 924 required for at least one function. Optionally, the application module 924 includes: a receiving unit 924a, a processing unit 924b and a transmitting unit 924 c. Wherein, the receiving unit 924a is configured to implement the step related to receiving; the processing unit 924b is used to implement steps relating to calculations or processing; the transmitting unit 924c is configured to implement the steps related to the transmission.

Further, the memory 920 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Those skilled in the art will appreciate that the architecture shown in fig. 9 does not constitute a limitation of the BTS described above, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.

Referring to fig. 10, a block diagram of a BSC provided in an embodiment of the present application is shown. The BSC includes: a processor 1010, a memory 1020, and a communication interface 1030.

The processor 1010 is connected to the memory 1020 and the communication interface 1030 via a bus, respectively.

Communication interface 1030 is used to enable communication with other network elements.

Processor 1010 includes one or more processing cores. The processor 1010 implements the functions of the BSC in the various method embodiments described above by running an operating system or application modules.

Optionally, memory 1020 may store an operating system 1022, application modules 1024 as required for at least one function. Optionally, the application module 1024 includes: a receiving unit 1024a, a processing unit 1024b, and a transmitting unit 1024 c. Wherein, the receiving unit 1024a is configured to implement the receiving related step; processing unit 1024b is used to implement steps related to calculations or processing; the transmitting unit 1024c is used to implement the steps related to the transmission.

Further, memory 1020 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Those skilled in the art will appreciate that the architecture shown in fig. 10 does not constitute a limitation of the BSC described above, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.

Referring to fig. 11, a block diagram of a base station BTS provided in another embodiment of the present application is shown. The BTS comprises: a receiving module 1110, a processing module 1120, and a transmitting module 1130.

The receiving module 1110 is used to implement the receiving steps in the embodiment of fig. 4, the embodiment of fig. 5, or the embodiment of fig. 7, and other implicit receiving steps performed by the BTS;

the processing module 1120 is configured to implement the processing steps of step 302, step 404, step 407, step 510, etc. in the embodiment of fig. 4, the embodiment of fig. 5, or the embodiment of fig. 7, and other implicit processing steps performed by the BTS;

the sending module 1130 is configured to implement the sending steps of step 303, step 306, step 405, step 4011, step 409, step 410, step 412, step 507, etc. in the above-described fig. 4 embodiment, or the fig. 5 embodiment, or the fig. 7 embodiment, as well as other implicit sending steps executed by the BTS;

the receiving module 1110 may be implemented by the processor 910 in fig. 9 executing the receiving unit 924a in the memory 920; processing module 1120 may be implemented by processor 910 in fig. 9 executing processing unit 924b in memory 920; the sending module 1130 may be implemented by the processor 910 in fig. 9 executing the sending unit 924c in the memory 920.

Referring to fig. 12, a block diagram of a BSC provided in another embodiment of the present application is shown. The BSC includes: a receiving module 1210, a processing module 1220 and a transmitting module 1230.

The receiving module 1210 is configured to implement the receiving steps of step 304, step 307, step 415, and the like in the foregoing fig. 4 embodiment, or fig. 5 embodiment, or fig. 7 embodiment, and other implicit receiving steps performed by the BSC;

the processing module 1220 is configured to implement the processing steps of step 407, step 411, etc. in the embodiment of fig. 4, the embodiment of fig. 5, or the embodiment of fig. 7, and other implicit processing steps executed by the BSC;

the sending module 1230 is configured to implement the sending steps of step 305, step 406, step 501, step 504, step 508, etc. in the above-described fig. 4 embodiment, fig. 5 embodiment, or fig. 7 embodiment, as well as other implicit sending steps performed by the BSC;

the receiving module 1210 may be implemented by the processor 1010 in fig. 10 executing the receiving unit 1024a in the memory 1020; processing module 1220 may be implemented by processor 1010 in FIG. 10 executing processing unit 1024b in memory 1020; the transmitting module 1230 may be implemented by the processor 1010 in fig. 10 executing the transmitting unit 1024c in the memory 1020.

It should be noted that this application further provides a computer-readable storage medium, where at least one instruction is stored in the computer-readable storage medium, and the at least one instruction is loaded and executed by a processor to implement the mobility management method provided by each of the above method embodiments.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A mobility management method, characterized in that the method comprises:

a base station BTS receives an uplink receiving signal, wherein the uplink receiving signal comprises a training sequence code TSC sent by a first mobile station MS;

the BTS determines n MSs with the strongest uplink receiving level in the uplink receiving signals, wherein the n MSs comprise the first MS, and n is a positive integer;

the BTS performs joint channel estimation on the n MSs with the strongest uplink receiving level to obtain channel factors of the n MSs;

the BTS respectively calculates m groups of channel factors of the n MSs at adjacent m moments to align and filter the m groups of channel factors to obtain the filtered channel factors of the n MSs;

the BTS is based on a formula according to the first TSC corresponding to the first MS

Calculating an uplink receiving level of the first MS, wherein P_kIs the uplink reception level of the first MS, k represents that the first MS is the kth MS, h_k(i) Is a filtered channel factor of the first MS;

and the BTS reports the uplink receiving level of the first MS to a base station controller BSC, and the uplink receiving level is used for the BSC to carry out mobility management on the first MS.

2. The method as claimed in claim 1, wherein the BTS determining n MSs with the strongest uplink reception level in the uplink received signal comprises:

the BTS calculates the signal-to-noise ratio (SNR) of each MS in the uplink received signal; determining the signal-to-noise ratio SNR as n MSs with the strongest uplink receiving level from the MSs with the top n bits ordered from high to low;

or,

the BTS calculates the MSE of each MS in the uplink received signal; and determining the MSE from low to high as the n MSs with the strongest uplink receiving level.

3. A mobility management method, characterized in that the method comprises:

a base station controller BSC receives uplink receiving levels of a first mobile station MS reported by at least one base station, wherein each uplink receiving level corresponds to a cell;

the BSC carries out mobility management on the first MS according to the signal quality of each cell where the first MS is located;

any one of the at least one base station is configured to receive an uplink received signal, where the uplink received signal includes a training sequence code TSC sent by a first mobile station MS; determining n MSs with the strongest uplink receiving level in the uplink receiving signal, wherein the n MSs comprise the first MS, and n is a positive integer; performing joint channel estimation on the n MSs with the strongest uplink receiving level to obtain channel factors of the n MSs; respectively calculating m groups of channel factors of the n MSs at adjacent m moments, and aligning and filtering the m groups of channel factors to obtain filtered channel factors of the n MSs; according to the first TSC corresponding to the first MS, based on a formula

Calculating an uplink receiving level of the first MS, wherein P_kIs the uplink reception level of the first MS, k represents that the first MS is the kth MS, h_k(i) Is a filtered channel factor of the first MS; and reporting the uplink receiving level of the first MS to the BSC, wherein the uplink receiving level is used for the BSC to carry out mobility management on the first MS.

4. An apparatus for mobility management, the apparatus comprising:

a receiving module, configured to receive an uplink receiving signal, where the uplink receiving signal includes a training sequence code TSC sent by a first mobile station MS;

a processing module, configured to determine n MSs with a strongest uplink reception level in the uplink received signal, where the n MSs include the first MS, and n is a positive integer; performing joint channel estimation on the n MSs with the strongest uplink receiving level to obtain channel factors of the n MSs; respectively calculating m groups of channel factors of the n MSs at adjacent m moments, aligning and filtering to obtain filtered channel factorsChannel factors of the n MSs; according to the first TSC corresponding to the first MS, based on a formula

a sending module, configured to report the uplink receiving level of the first MS to a base station controller BSC, where the uplink receiving level is used for the BSC to perform mobility management on the first MS.

5. The apparatus of claim 4,

the processing module is configured to calculate a signal-to-noise ratio SNR of each MS in the uplink received signal; determining the signal-to-noise ratio SNR as n MSs with the strongest uplink receiving level from the MSs with the top n bits ordered from high to low;

or,

the processing module is configured to calculate an MSE of each MS in the uplink received signal; and determining the MSE from low to high as the n MSs with the strongest uplink receiving level.

6. An apparatus for mobility management, the apparatus comprising:

a receiving module, configured to receive uplink receiving levels of a first mobile station MS reported by at least one base station, where each uplink receiving level corresponds to a cell;

a processing module, configured to determine, according to the uplink receiving level of the first MS, signal quality of each cell where the first MS is located;

the processing module is further configured to perform mobility management on the first MS according to the signal quality of each cell where the first MS is located;

wherein any one of the at least one base station is configured to receive uplink receptionThe uplink receiving signal comprises a Training Sequence Code (TSC) sent by a first Mobile Station (MS); determining n MSs with the strongest uplink receiving level in the uplink receiving signal, wherein the n MSs comprise the first MS, and n is a positive integer; performing joint channel estimation on the n MSs with the strongest uplink receiving level to obtain channel factors of the n MSs; respectively calculating m groups of channel factors of the n MSs at adjacent m moments, and aligning and filtering the m groups of channel factors to obtain filtered channel factors of the n MSs; according to the first TSC corresponding to the first MS, based on a formula

Calculating an uplink receiving level of the first MS, wherein P_kIs the uplink reception level of the first MS, k represents that the first MS is the kth MS, h_k(i) Is a filtered channel factor of the first MS; and reporting the uplink receiving level of the first MS to a Base Station Controller (BSC), wherein the uplink receiving level is used for the BSC to carry out mobility management on the first MS.

7. A base station, characterized in that the base station comprises: a processor and a memory, the memory storing at least one instruction, the processor executing the at least one instruction for implementing the steps of:

receiving an uplink receiving signal, wherein the uplink receiving signal comprises a Training Sequence Code (TSC) sent by a first Mobile Station (MS);

respectively calculating m groups of channel factors of the n MSs at adjacent m moments, and aligning and filtering the m groups of channel factors to obtain filtered channel factors of the n MSs;

according to the first TSC corresponding to the first MS, based on a formula

and reporting the uplink receiving level of the first MS to a Base Station Controller (BSC), wherein the uplink receiving level is used for the BSC to carry out mobility management on the first MS.

8. The base station of claim 7, wherein the processor executes the at least one instruction to perform the steps of:

or,

9. A base station controller, comprising: a processor and a memory, the memory storing at least one instruction, the processor executing the at least one instruction for implementing the steps of:

receiving uplink receiving levels of a first mobile station MS reported by at least one base station, wherein each uplink receiving level corresponds to a cell;

determining the signal quality of each cell where the first MS is located according to the uplink receiving level of the first MS;

performing mobility management on the first MS according to the signal quality of each cell where the first MS is located;

wherein any one of the at least one base station is configured to receive an uplink received signal, where the uplink received signal includes training sent by the first mobile station MSA sequence code TSC; determining n MSs with the strongest uplink receiving level in the uplink receiving signal, wherein the n MSs comprise the first MS, and n is a positive integer; performing joint channel estimation on the n MSs with the strongest uplink receiving level to obtain channel factors of the n MSs; respectively calculating m groups of channel factors of the n MSs at adjacent m moments, and aligning and filtering the m groups of channel factors to obtain filtered channel factors of the n MSs; according to the first TSC corresponding to the first MS, based on a formula

10. A computer-readable storage medium storing at least one instruction which, when executed by a processor, is configured to perform the steps of:

according to the first TSC corresponding to the first MS, based on a formula

11. The computer-readable storage medium of claim 10, wherein the at least one instruction, when executed by the processor, is configured to perform the steps of:

or,

12. A computer-readable storage medium storing at least one instruction which, when executed by a processor, is configured to perform the steps of:

any one of the at least one base station is configured to receive an uplink received signal, where the uplink received signal includes a training sequence code TSC sent by a first mobile station MS; determining the uplink receiving level in the uplink receiving signal to be strongestThe n MSs include the first MS, n is a positive integer; performing joint channel estimation on the n MSs with the strongest uplink receiving level to obtain channel factors of the n MSs; respectively calculating m groups of channel factors of the n MSs at adjacent m moments, and aligning and filtering the m groups of channel factors to obtain filtered channel factors of the n MSs; according to the first TSC corresponding to the first MS, based on a formula

13. A mobile communication system, characterized in that the system comprises a base station BTS and a base station controller BSC;

the BTS comprising mobility management means according to any of claims 4 to 5, the BSC comprising mobility management means according to claim 6;

or,

the BTS is a base station according to any of claims 7 to 8, and the BSC comprises a base station controller according to claim 9.