CN111770519A

CN111770519A - Pilot frequency measurement method, device, equipment and readable storage medium

Info

Publication number: CN111770519A
Application number: CN202010709649.6A
Authority: CN
Inventors: 石亚坤; 孙强
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2020-10-13
Anticipated expiration: 2040-07-22
Also published as: CN111770519B

Abstract

The embodiment of the application provides a pilot frequency measuring method, a pilot frequency measuring device, a pilot frequency measuring equipment and a readable storage medium, wherein after an electronic device receives a to-be-measured frequency point list containing at least one GSM frequency point sent by a network side, a plurality of measuring GAPs are distributed according to a distribution proportion, so that part of the measuring GAPs in the measuring GAPs are distributed to LTE frequency points, the rest measuring GAPs are distributed to GSM frequency points, the LTE frequency points are measured on the measuring GAPs used for measuring the LTE frequency points, and the GSM frequency points are measured on the measuring GAPs used for measuring the GSM frequency points. In the process, the electronic equipment can allocate the measurement GAP for pilot frequency measurement and perform pilot frequency measurement according to the allocation proportion, so that the problem of measurement GAP waste caused by the fact that the pilot frequency measurement depends on the same-frequency measurement is solved, and the purpose of utilizing the measurement GAP to the maximum extent is achieved.

Description

Pilot frequency measurement method, device, equipment and readable storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a pilot frequency measurement method, a pilot frequency measurement device, pilot frequency measurement equipment and a readable storage medium.

Background

With the rapid development of the technology, Multiple communication networks coexist, and a terminal device generally supports Multiple communication modes, such as a Long Term Evolution (LTE) network mode, a global system for mobile communications (GSM) network mode, a Code Division Multiple Access (CDMA) network mode, and the like.

In the process of using the terminal equipment by a user, the terminal equipment is frequently switched back and forth between different network modes due to the movement of the user, service switching and the like. For example, when the user answers or makes a call, the terminal device is in a GSM network mode, and when the terminal device accesses to the 4th Generation mobile communication (4G) network, the terminal device switches to an LTE mode. In order to rapidly switch between various modes, the terminal device is required to measure the frequency point of the slave mode in the master mode, and the measurement is called as inter-system measurement. The network mode in which the terminal device is currently located is called a master mode, and the other network modes are called slave modes. When the master mode is an LTE mode and the slave mode is a GSM mode, the protocol stipulates that the terminal equipment uses a measurement GAP (GAP) to measure the pilot frequency in the LTE connection state, and the pilot frequency measurement comprises the measurement of other LTE frequency points except the LTE frequency point where the current resident cell is located and the measurement of GSM frequency points. The measurement GAP is a continuous time slice specified by the protocol to be 6 milliseconds (ms) in length. During the period of starting the GAP, the terminal equipment stops the LTE related service and performs pilot frequency measurement.

The different-frequency measurement depends on the same-frequency measurement, and the same-frequency measurement refers to the measurement of the terminal equipment on the LTE frequency point where the current resident cell is located. The period of the terminal equipment for carrying out the same-frequency measurement is fixed. Each same-frequency measurement period comprises a plurality of trigger occasions, and the terminal equipment triggers different-frequency measurement after performing same-frequency measurement on the trigger occasions. The trigger timing is, for example, a paging timing. However, the period and trigger timing of the co-frequency measurement depend on paging, and when the paging period and paging location of LTE paging change, the length of the co-frequency measurement period changes, or the trigger timing in the co-frequency measurement period changes, resulting in waste of measurement GAP.

Disclosure of Invention

The embodiment of the application provides a pilot frequency measurement method, a device, equipment and a readable storage medium, wherein a plurality of measurement GAPs are distributed according to a preset proportion, so that the problem of measurement GAP waste caused by the fact that pilot frequency measurement depends on common frequency measurement is solved, and the purpose of flexibly performing pilot frequency measurement is achieved.

In a first aspect, an embodiment of the present application provides an inter-frequency measurement method, including:

receiving a frequency point list to be measured sent by a network side, wherein the frequency point list to be measured comprises at least one global system for mobile communication (GSM) frequency point;

determining measurement GAPs for LTE frequency point measurement and measurement GAPs for GSM frequency point measurement from the plurality of measurement GAPs according to a distribution proportion, wherein the distribution proportion indicates a ratio of a first quantity and a second quantity, the first quantity is used for indicating the quantity of the measurement GAPs for measuring the LTE frequency point in the plurality of measurement GAPs, the second quantity is used for indicating the quantity of the measurement GAPs for measuring the GSM frequency point in the plurality of measurement GAPs, and the LTE frequency point is an inter-frequency point;

measuring an LTE frequency point on a measurement GAP for measuring the LTE frequency point;

and measuring the GSM frequency point on a measurement GAP for measuring the GSM frequency point.

In one possible design, the determining a measurement GAP for LTE frequency point measurement and a measurement GAP for GSM frequency point measurement from the plurality of measurement GAPs includes:

dividing every continuous x + y measurement GAPs in the measurement GAPs into a group to obtain a plurality of groups, wherein the distribution proportion is x/y, x is not less than 1 and is an integer, y is not less than 1 and is an integer, and x is less than y;

from each set of measurement GAPs, x measurement GAPs for the LTE measurement and y measurement GAPs for the GSM measurement are determined.

In one possible design, the plurality of packets includes a first packet and a second packet, and the measuring the GSM frequency point on a measurement GAP for measuring the GSM frequency point includes:

measuring a first GSM frequency point on a first measurement GAP (GAP measurement) used for measuring the GSM frequency point in the first packet;

and searching the first GSM frequency point on a second measurement GAP used for measuring the GSM frequency point in the second grouping, wherein the interval between the first measurement GAP and the second measurement GAP is a preset interval.

In one possible design, the measuring a first GSM frequency bin on a first measurement GAP used for measuring the GSM frequency bin in the first packet includes:

receiving the GAP period and the GAP offset sent by the network side;

determining an S frame corresponding to the first GSM frequency point in the first measurement GAP according to the GAP period and the GAP offset, wherein the S frame is a frame where a synchronous burst sequence in a first 51-multiframe is located;

and if the S frame exists in the first measurement GAP, decoding the BSIC information of the base station identification code carried by the S frame, and measuring the first GSM frequency point according to the BSIC information.

In one possible design, the method further includes:

and if the S frame does not exist in the first measurement GAP, determining the S frame corresponding to the first GSM frequency point in the second measurement GAP.

In one possible design, the period of the measurement GAP is 80ms, x is 1, y is 2, the preset interval is 240ms, and the searching for the first GSM frequency point on the second measurement GAP used for measuring the GSM frequency points in the second packet includes:

and determining the starting position of the second measurement GAP from a second 51 multiframe according to the position of the S frame and the preset interval, wherein the first 51 multiframe and the second 51 multiframe are two adjacent 51 multiframes.

In one possible design, the period of the measurement GAP includes 40ms, where x is 1, y is 2, the preset interval is 120ms, and the searching for the first GSM frequency point on the second measurement GAP used for measuring the GSM frequency points in the second packet includes:

and determining the starting position of the second measurement GAP from the first 51 multiframe according to the position of the S frame and the preset interval.

In one possible design, the plurality of measurement GAPs is 12 measurement GAPs.

In a second aspect, an embodiment of the present application provides an inter-frequency measurement apparatus, including:

the receiving and sending module is used for receiving a frequency point list to be measured sent by a network side, wherein the frequency point list to be measured comprises at least one global system for mobile communication (GSM) frequency point;

the processing module is configured to determine, according to a distribution proportion, measurement GAPs used for LTE frequency point measurement and measurement GAPs used for GSM frequency point measurement from the plurality of measurement GAPs, where the distribution proportion indicates a ratio between a first quantity and a second quantity, the first quantity is used to indicate the quantity of the measurement GAPs used for measuring long term evolution LTE frequency points in the plurality of measurement GAPs, the second quantity is used to indicate the quantity of the measurement GAPs used for measuring GSM frequency points in the plurality of measurement GAPs, the LTE frequency points are pilot frequency points, the LTE frequency points are measured on the measurement GAPs used for measuring LTE frequency points, and the GSM frequency points are measured on the measurement GAPs used for measuring GSM frequency points.

In one feasible design, when determining a measurement GAP for LTE frequency point measurement and a measurement GAP for GSM frequency point measurement from the multiple measurement GAPs, the processing module is configured to divide every consecutive x + y measurement GAPs in the multiple measurement GAPs into a group to obtain multiple groups, where the distribution ratio is x/y, x is greater than or equal to 1 and is an integer, y is greater than or equal to 1 and is an integer, and x is less than y; from each set of measurement GAPs, x measurement GAPs for the LTE measurement and y measurement GAPs for the GSM measurement are determined.

In one possible design, the plurality of packets include a first packet and a second packet, and when the GSM frequency points are measured on a measurement GAP for measuring GSM frequency points, the processing module is configured to measure a first GSM frequency point on a first measurement GAP for measuring GSM frequency points in the first packet, and search for the first GSM frequency point on a second measurement GAP for measuring GSM frequency points in the second packet, where an interval between the first measurement GAP and the second measurement GAP is a preset interval.

In a possible design, the transceiver module is further configured to receive a GAP period and a GAP offset sent by the network side;

when measuring a first GSM frequency point on a first measurement GAP used for measuring the GSM frequency point in the first packet, the processing module is configured to determine, according to the GAP period and the GAP offset, an S frame corresponding to the first GSM frequency point in the first measurement GAP, where the S frame is a frame where a synchronous burst sequence in a first 51-multiframe is located, and if the S frame exists in the first measurement GAP, decode base station identity code BSIC information carried by the S frame, and measure the first GSM frequency point according to the BSIC information.

In a feasible design, the processing module is further configured to determine the S frame corresponding to the first GSM frequency point in the second measurement GAP if the S frame does not exist in the first measurement GAP.

In one possible design, the period of the measurement GAP is 80ms, x is 1, y is 2, and the preset interval is 240ms, when the processing module searches for the first GSM frequency point on a second measurement GAP used for measuring the GSM frequency points in the second packet, the processing module is configured to determine the start position of the second measurement GAP from a second 51 multiframe according to the position of the S frame and the preset interval, where the first 51 multiframe and the second 51 multiframe are two adjacent 51 multiframes.

In one possible design, the period of the measurement GAP includes 40ms, where x is 1, y is 2, and the preset interval is 120ms, and when the processing module searches for the first GSM frequency point on a second measurement GAP used for measuring the GSM frequency points in the second packet, the processing module is configured to determine the starting position of the second measurement GAP from the first 51 multiframe according to the position of the S frame and the preset interval.

In a third aspect, an embodiment of the present invention provides an electronic device, including: a processor, memory, and executable instructions; wherein the executable instructions are stored in the memory and configured to be executed by the processor, the executable instructions comprising instructions for performing the method as described above in the first aspect or in various possible implementations of the first aspect.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having stored therein computer-executable instructions for implementing the method according to the first aspect or in various possible implementations of the first aspect when executed by a processor.

According to the pilot frequency measurement method, device and equipment readable storage medium provided by the embodiment of the application, after the electronic equipment receives a to-be-measured frequency point list containing at least one GSM frequency point sent by a network side, a plurality of measurement GAPs are distributed according to a distribution proportion, so that part of the measurement GAPs in the measurement GAPs are distributed to LTE frequency points, the rest measurement GAPs are distributed to GSM frequency points, then the LTE frequency points are measured on the measurement GAPs used for measuring the LTE frequency points, and the GSM frequency points are measured on the measurement GAPs used for measuring the GSM frequency points. In the process, the electronic equipment can allocate the measurement GAP for pilot frequency measurement and perform pilot frequency measurement according to the allocation proportion, so that the problem of waste of the measurement GAP caused by the fact that the pilot frequency measurement depends on the same-frequency measurement is solved, the purpose of utilizing the measurement GAP to the maximum extent is achieved, and the purpose of uniformly and flexibly performing the pilot frequency measurement is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1A is a schematic diagram of a network architecture to which the inter-frequency measurement method according to the embodiment of the present application is applied;

fig. 1B is a schematic diagram of another network architecture to which the inter-frequency measurement method according to the embodiment of the present application is applied;

fig. 2 is a schematic diagram of a GSM radio frame structure in a pilot frequency measurement method according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a 51-multiframe in an inter-frequency measurement method according to an embodiment of the present application;

fig. 4 is a flowchart of an inter-frequency measurement method provided in an embodiment of the present application;

fig. 5A is a schematic diagram illustrating allocation of measurement GAPs in the inter-frequency measurement method according to the embodiment of the present application;

fig. 5B is a schematic diagram illustrating another allocation of measurement GAPs in the inter-frequency measurement method according to the embodiment of the present application;

fig. 5C is a schematic diagram illustrating allocation of another measurement GAP in the inter-frequency measurement method according to the embodiment of the present application;

fig. 6 is a schematic diagram illustrating first measurement of a GSM frequency point in a pilot frequency measurement method provided in the embodiment of the present application;

fig. 7 is a flowchart of an inter-frequency measurement method provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of an inter-frequency measurement apparatus according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

At present, due to coexistence of multiple network modes, a terminal device often switches back and forth between an LTE network mode, a GSM network mode, a CDMA network mode, and the like. The network mode in which the general terminal device is currently located is called a master mode, and the other network modes are called slave modes. When the master mode is the LTE mode and the slave mode is the GSM mode, the protocol provides for the terminal device to use a measurement GAP (GAP) for inter-frequency measurement while in the LTE connected state. The pilot frequency measurement refers to the measurement of other frequency points except the LTE frequency point where the cell where the terminal device currently resides, including the LTE frequency point and the GSM frequency point of the non-resident cell, and the measurement of the GSM frequency point is also referred to as pilot system measurement.

The different-frequency measurement depends on the same-frequency measurement, and the same-frequency measurement refers to the measurement of the terminal equipment on the LTE frequency point where the current resident cell is located. The period of the terminal equipment for carrying out the same-frequency measurement is fixed, and the period of the same-frequency measurement comprises 320ms, 640ms, 1280ms, 2560ms and the like. In each same-frequency measurement period, the terminal equipment performs same-frequency measurement after being triggered by paging and the like, and performs different-frequency measurement after the same-frequency measurement is completed. The inter-frequency measurement that can be triggered in each co-frequency measurement period is limited, for example, when the co-frequency measurement period is 320ms and the measurement GAP period is 40ms, a maximum of 8 measurement GAPs exist in one co-frequency measurement period. And the terminal equipment allocates the measurement GAPs to perform pilot frequency measurement. However, the period of the same-frequency measurement depends on paging and the like, and when the paging period, paging location and the like of LTE paging change, the period of the same-frequency measurement changes. For example, the common-frequency measurement period is changed from 320ms to 640ms, and if the changed common-frequency measurement period starts from 320ms to 960ms and ends, GAPs in the period are wasted because no trigger time exists between 640ms and 320 ms; for another example, the length of the common-frequency measurement period is not changed, but the trigger time is changed, for example, paging at 160ms is changed, it is assumed that there are 8 measurement GAPs in the common-frequency measurement period, 4 measurement GAPs located at 0ms to 160ms are used for measuring the frequency point a, and in addition, 4 measurement GAPs located at 160ms to 320ms are used for measuring the frequency point B. When the trigger time is changed, the terminal equipment needs to recover the next 4 measurement GAPs, reallocate the 8 measurement GAPs in the new same-frequency measurement period, allocate 4 of the measurement GAPs to the measurement frequency point a, and allocate the other 4 measurement GAPs to the measurement frequency point B, so that the terminal equipment cannot uniformly perform different-system measurement.

Moreover, in the process of carrying out measurement of different systems by relying on the same-frequency measurement, the same-frequency measurement task of the main mode is probably extruded by the measurement tasks of other modes. For example, a certain time point is a time point for triggering common-frequency measurement, but the reporting priority of another card at the time point is higher, so that the time point is used by another card, and the terminal device cannot perform common-frequency measurement at the time point, and further cannot perform inter-frequency measurement.

According to the above, it can be seen that: the existing pilot frequency measurement is limited by common frequency measurement, and the waste phenomenon of measurement GAP and the uneven measurement phenomenon are easy to occur.

In view of this, embodiments of the present application provide a pilot frequency measurement method, a device, and an apparatus readable storage medium, which allocate a plurality of measurement GAPs according to a preset proportion, so as to solve the problem of measurement GAP waste caused by the pilot frequency measurement depending on the common frequency measurement, and achieve the purpose of flexibly performing the pilot frequency measurement.

Fig. 1A is a schematic diagram of a network architecture to which the inter-frequency measurement method according to the embodiment of the present application is applied. Referring to fig. 1A, the network architecture includes an electronic device 1, an LTE base station 2, and a GSM base station 3. The electronic device 1 is simultaneously in the coverage of the LTE base station 2 and the coverage of the GSM base station 3.

Fig. 1B is a schematic diagram of another network architecture to which the inter-frequency measurement method according to the embodiment of the present application is applied. Referring to fig. 1B, the network architecture includes an electronic device 1, an LTE base station 2, and a GSM base station 3. The electronic device 1 is in the coverage of the LTE base station 2 but not in the coverage of the GSM base station 3.

In the above fig. 1A and fig. 1B, when the electronic device 1 is in the LTE mode connection state, the electronic device 1 divides the plurality of measurement GAPs into the measurement GAPs for measuring the LTE frequency point and the measurement GAPs for measuring the GSM frequency point according to a preset allocation ratio. And then, measuring the LTE frequency point on a measurement GAP used for measuring the LTE frequency point, and measuring the GSM frequency point on the measurement GAP used for measuring the GSM frequency point.

The following briefly describes the measurement process of the GSM frequency point. First, the frame structure of the GSM system is introduced. For example, please refer to fig. 2, fig. 2 is a schematic diagram of a GSM radio frame structure in the inter-frequency measurement method according to the embodiment of the present application.

Referring to fig. 2, the GSM system employs Time Division Multiple Access (TDMA) technology. The GSM wireless frame is divided into 5 levels from the ultra-high frame to the time slot, and the ultra-high frame, the super frame, the multiframe, the frame and the time slot are sequentially arranged. A hyperframe contains 2048 superframes and a superframe contains 26 or 51 multiframes. Multiframes are divided into two categories: 26 multiframes and 51 multiframes, the purposes of which are different, 26 multiframes are mainly used for transmitting service information, and 51 multiframes are mainly used for transmitting control information. One superframe is 6.12 seconds(s) in duration, one superframe contains 1326 TDMA frames, one TDMA frame is about 4.615ms, and one TDMA frame is divided into 8 time slots, one occurrence on each time slot is called a Burst (Burst). And dividing the Burst into 5 types according to the content carried by the Burst: a Normal Burst (NB) sequence, an access burst (NB) sequence, a frequency correction burst (FB) sequence, a Synchronization Burst (SB) sequence, and a Dummy Burst (DB) sequence.

When the electronic device performs GSM frequency point measurement, first, a Frequency Correction Channel (FCCH) carried in the FB sequence is detected to perform frequency synchronization, then, a Received Signal Strength Indication (RSSI) of the GSM carrier frequency is measured, and a Synchronization Channel (SCH) carried in the SB sequence is detected to perform time synchronization. Then, the electronic device reads the SCH again to obtain a Base Station Identity Code (BSIC).

Fig. 3 is a schematic structural diagram of a 51-multiframe in the inter-frequency measurement method according to the embodiment of the present application. Referring to fig. 3, the control information is repeatedly transmitted in a cycle of 51 subframes, where an F frame represents a frequency correction burst TDMA frame, an S frame represents a synchronization burst TDMA frame, a B frame represents a Broadcast Control Channel (BCCH) occupying 4 TDMA frames, a C frame represents a Common Control Channel (CCCH) occupying 4 TDMA frames, and an I frame represents an idle TDMA frame. As can be seen from fig. 3: the FCCH is transmitted only 5 times in a 51-multiframe period and each transmission is of a duration of one time slot, i.e., (TS0), of approximately 0.577 ms. The F frames are located on the 0 th, 10 th, 20 th, 30 th, 40 th TDMA frame of the 51-multiframe, and the S frames are located on the 1 st, 11 th, 21 th, 31 th, 41 th, 51 th TDMA frame of the 51-multiframe.

The different frequency measurement method according to the embodiment of the present application is described in detail below based on the network architecture shown in fig. 1 and the measurement process of GSM frequency points. For example, please refer to fig. 4.

Fig. 4 is a flowchart of an inter-frequency measurement method provided in an embodiment of the present application, where an execution main body of the embodiment is, for example, the electronic device in fig. 1, and the embodiment includes:

101. receiving a frequency point list to be measured sent by a network side, wherein the frequency point list to be measured comprises at least one GSM frequency point.

Illustratively, when the main mode is an LTE mode and the electronic device is in a connected state, the electronic device may take out a part of time to perform inter-frequency measurement, where the inter-frequency measurement refers to measurement of other frequency points other than the LTE frequency point where the cell where the electronic device currently resides, including the LTE frequency point and the GSM frequency point of the non-resident cell, and measurement of the GSM frequency point is also referred to as inter-system measurement. The purpose of measuring the LTE frequency point of the non-resident cell is to ensure that the electronic equipment is smoothly switched to other LTE cells, and the purpose of inter-system measurement is to ensure that the electronic equipment is smoothly switched to a GSM cell. It is clear that inter-frequency measurements comprise inter-system measurements.

Therefore, when the electronic device is in the connection state of the LTE mode, the list of frequency points to be measured, which is sent by the network side and contains at least one GSN frequency point, can be received. The network side refers to an LTE base station, such as an evolved nodeb.

102. And determining a measurement GAP for LTE frequency point measurement and a measurement GAP for GSM frequency point measurement from the plurality of measurement GAPs according to the allocation proportion.

The allocation proportion indicates a ratio of a first number and a second number, the first number is used for indicating the number of measurement GAPs in a plurality of measurement GAPs (GAPs) used for measuring a Long Term Evolution (LTE) frequency point, the second number is used for indicating the number of measurement GAPs in the plurality of measurement GAPs used for measuring a GSM frequency point, and the LTE frequency point is an inter-frequency point.

For example, the network side configures a measurement GAP period and a GAP offset (gapoffset) in advance, and according to the two values, the electronic device can calculate a 6ms continuous time segment for frequency point measurement in one GAP period. For example, if the period of the measurement GAP is 40ms, the 40ms has a 6ms continuous time segment, and the 6ms continuous time segment is a measurement GAP. For a total of 12 GAP periods, the 12 GAP periods are 480ms time periods consecutive in the time domain. When gapoffset of a measurement GAP is 0ms, it means that the period of the measurement GAP starts from 0ms to 40ms, and from 0ms to 6ms is a measurement GAP.

In the embodiment of the application, the electronic equipment obtains the distribution proportion according to network pre-configuration and the like. For example, the allocation ratio is pre-configured on the network side; for another example, the allocation proportion is generated by the electronic device according to the number of LTE frequency points to be measured and the number of GSM frequency points to be measured. The distribution ratio is, for example, 1:2, 1:3, 1:4, etc., and the present embodiment is not limited thereto.

When the electronic equipment performs pilot frequency measurement, the plurality of measurement GAPs are allocated according to the allocation proportion, so that a part of the measurement GAPs in the plurality of measurement GAPs are allocated to the LTE frequency point, and the other part of the measurement GAPs are allocated to the GSM frequency point.

103. And measuring the LTE frequency point on a measurement GAP used for measuring the LTE frequency point.

For example, the electronic device measures the LTE frequency point on each measurement GAP used for measuring the LTE frequency point.

104. And measuring the GSM frequency point on a measurement GAP for measuring the GSM frequency point.

For example, the electronic device measures GSM frequency points at each measurement GAP used for measuring GSM frequency points.

According to the pilot frequency measurement method provided by the embodiment of the application, after receiving a to-be-measured frequency point list containing at least one GSM frequency point sent by a network side, electronic equipment allocates a plurality of measurement GAPs according to an allocation proportion, allocates part of the measurement GAPs to LTE frequency points, allocates the rest measurement GAPs to GSM frequency points, measures the LTE frequency points on the measurement GAPs used for measuring the LTE frequency points, and measures the GSM frequency points on the measurement GAPs used for measuring the GSM frequency points. In the process, the electronic equipment can allocate the measurement GAP for pilot frequency measurement and perform pilot frequency measurement according to the allocation proportion, so that the problem of waste of the measurement GAP caused by the fact that the pilot frequency measurement depends on the same-frequency measurement is solved, the purpose of utilizing the measurement GAP to the maximum extent is achieved, and the purpose of uniformly and flexibly performing the pilot frequency measurement is achieved.

In the above embodiment, when the allocation proportion is x/y, x is greater than or equal to 1 and is an integer, y is greater than or equal to 1 and is an integer, and x is less than y, when the electronic device allocates a plurality of measurement GAPs, each continuous x + y measurement GAPs in the plurality of measurement GAPs are divided into a group to obtain a plurality of groups, the x measurement GAPs in each group are allocated to LTE frequency points, and the remaining y measurement GAPs in each group are allocated to GSM frequency points.

For example, assuming that x/y is 1:2, and there are 12 GAPs, the electronic device may assign the 12 GAPs according to fig. 5A, 5B, and 5C.

Fig. 5A is a schematic diagram illustrating allocation of measurement GAPs in the inter-frequency measurement method according to the embodiment of the present application. Referring to FIG. 5A, the GAP index (GAP index) of 12 measured GAPs is GAP index0-GAP index11, and hereinafter, for clarity, the measured GAP with GAPindex being GAP index0-GAP index11 is denoted as GAP0-GAP 11. The electronic device divides the 12 measurement GAPs into 4 groups: GAP0-GAP2, GAP3-GAP5, GAP6-GAP8 and GAP9-GAP 11. The electronic device allocates the first measurement GAP in each group to the LTE frequency point, and allocates the remaining two measurement GAPs to the GSM frequency point. For example, in the group GAP0-GAP2, measurement GAPs corresponding to GAP0 are allocated to LTE bins and measurement GAPs corresponding to GAP1 and GAP2 are allocated to GSM bins. The two measurement GAPs for measuring GSM frequency points are used for measuring different GSM frequency points. For example, there are 10 GSM frequency points to be measured in the frequency point list to be measured, the measurement GAP corresponding to the GAP0 is used to measure 5 of the 10 GSM frequency points, and the remaining 5 GSM frequency points are measured by the measurement GAP corresponding to the GAP 1.

Fig. 5B is a schematic diagram of another allocation of measurement GAPs in the inter-frequency measurement method provided in the embodiment of the present application. Referring to fig. 5B, compared to fig. 5A, in fig. 5B, the measurement GAPs corresponding to GAP0 and GAP1 are allocated to GSM frequency bins, and the measurement GAP corresponding to GAP2 is allocated to LTE frequency bins.

Fig. 5C is a schematic diagram of allocation of another measurement GAP in the inter-frequency measurement method provided in the embodiment of the present application. Referring to fig. 5C, compared to fig. 5A, in fig. 5C, the measurement GAPs corresponding to GAP0 and GAP2 are allocated to GSM frequency bins, and the measurement GAP corresponding to GAP1 is allocated to LTE frequency bins.

By adopting the scheme, the aim of flexibly distributing a plurality of measurement GAPs according to the distribution proportion is fulfilled.

In the above embodiment, the electronic device allocates a plurality of measurement GAPs to obtain a plurality of groups, where the groups include a first group and a second group, and when the electronic device measures a GSM frequency point on a measurement GAP used for measuring the GSM frequency point, the electronic device measures a first GSM frequency point on a first measurement GAP used for measuring the GSM frequency point in the first group; and searching the first GSM frequency point on a second measurement GAP used for measuring the GSM frequency point in the second grouping, wherein the interval between the first measurement GAP and the second measurement GAP is a preset interval.

For example, referring to fig. 5A, the first packet includes measurement GAPs such as GAP0-GAP2, and the second packet includes measurement GAPs such as GAP3-GAP 5. Suppose there are 6 GSM frequency points to be measured, which are GSM frequency point 1, GSM frequency point 2, GSM frequency point 3, GSM frequency point 4, GSM frequency point 5 and GSM frequency point 6. GAP1, GAP4, GAP7, and GAP10 are used to measure GSM frequency point 1, GSM frequency point 2, and GSM frequency point 3, and GAP2, GAP5, GAP8, and GAP11 are used to measure the remaining 3 GSM frequency points. The first measurement GAP is, for example, the measurement GAP indicated by GAP1, and the second measurement GAP is, for example, GAP 4.

In the process of measuring the GSM frequency point, the electronic device performs GSM frequency point measurement on the measurement GAP indicated by GAP1, and if the electronic device measures GSM frequency point 1 and GSM frequency point 2 on the measurement GAP indicated by GAP1, the electronic device continues to measure GSM frequency point 3 on GAP 4. The step of detecting the GSM frequency point 1 means that the electronic equipment determines an F frame or an S frame corresponding to the GSM frequency point 1 in the received 51-multiframe, decodes BSIC information in the S frame, and then obtains a measurement result of the GSM frequency point 1 according to the BSIC information; similarly, the electronic device measures the GSM frequency point 2, and determines an F frame or an S frame corresponding to the GSM frequency point 2 from the received 51-multiframe, decodes BSIC information in the S frame, and then obtains a measurement result of the GSM frequency point 2 according to the BSIC information.

In the first measurement process, the electronic equipment receives a GAP period and GAP offset issued by a network side; determining an S frame corresponding to the first GSM frequency point in the first measurement GAP according to the GAP period and the GAP offset, wherein the S frame is a frame where a synchronous burst sequence in a first 51-multiframe is located; if the S frame exists in the first measurement GAP, decoding Base Station Identification Code (BSIC) information carried by the S frame, and measuring the first GSM frequency point according to the BSIC information; and if the S frame does not exist in the first measurement GAP, determining the S frame corresponding to the first GSM frequency point in the second measurement GAP. For example, please refer to fig. 6.

Fig. 6 is a schematic diagram of first measuring GSM frequency points in the inter-frequency measurement method provided in the embodiment of the present application. Referring to fig. 6, a frame with a length of about 240ms, hereinafter referred to as 52-multiframe, is obtained by adding a GSM frame, i.e. the 51 st GSM frame in the figure, to a 51-multiframe. Of the 12 measurement GAPs, GAP1, GAP4, GAP7, and GAP10 are used to measure a first frequency point, which is, for example, one or more GSM frequency points in a list of frequency points to be measured. The electronic device receives a GAP period and a GAPoffset sent by the network side, wherein the GAP period is 40ms, as shown by a slash filling part in the figure. The offset is 0ms, i.e. the first 6ms in a GAP period is the measurement GAP, as shown in the filled portion of the square. The electronic equipment triggers GSM measurement in 0ms of GAP1, blindly finds S frames or F frames from 0ms, and if no S frames or F frames are found, the electronic equipment is considered not to measure GSM frequency points on the GAP 1. The electronic device continues to blindly find S or F frames on the GAP 4. Since the electronic device still does not find the S frame or the F frame on the GAP4, it indicates that the electronic device does not measure the GSM frequency point on the GAP 4. The electronic device then continues to blindly find S or F frames on the GAP 7. Since the electronic device finds the F frame on the GAP7, it can be known from the structure of the 51 multiframe: the first frame after the F frame is the S frame. Therefore, the electronic device decodes the BSIC information in the S frame to obtain the measurement result.

In this process, the GAP1 and the GAP7 are separated by 240ms, and a 52-multiframe (a 51-multiframe basis plus a GSM frame) is about 240ms long, and a 51-multiframe includes frames 0 to 50. The GAP1 and the GAP7 are separated by a 52-multiframe distance, and it is assumed that the first frame on the GAP1 is the 0 th frame (i.e., the first F frame) in the first 51-multiframe, i.e., the first frame on the GAP7 is the 1 st frame (i.e., the first S frame) of the 2 nd 51-multiframe. Furthermore, there are 5 equally spaced F frames in the 51 multiframes, so the electronic device must find the F frame or S frame on a measurement GAP for measuring GSM frames.

Meanwhile, the GAP1 and the GAP4 are separated by 120ms, so that the electronic equipment searches for an S frame or an f frame on the GAP4, and the probability of detecting the GSM frequency point by the electronic equipment is improved.

By adopting the scheme, the S frame or the F frame is determined according to the GAP period and the offset in the initial measurement, and the purpose of measuring the GSM frequency point for the first time is realized.

In the subsequent measurement process, the electronic device only measures the signal strength on the measurement GAP for measuring the GSM frequency point. Referring to fig. 6 again, the electronic device measures the signal strength of the C frame on the GAP10 according to the S frame or the F frame obtained in the GAP7 and the preset interval 120 when the C frame exists on the GAP10, so as to obtain the measurement result. The theoretical basis for doing so is: a 51 multiframe length is 235.365 by 51.615, and a GSM frame length of 4.615ms is added to the 51 multiframe length to 239.98, which equals about 240 ms. When the period for measuring the GAP is 40ms or 80ms, the value of 240ms can be divided by 40 or 80.

In the above embodiment, when the GAP period is 40ms and x/y is 1:2, the preset interval is 120ms, and when the electronic device searches for the first GSM frequency point on a second measurement GAP used for measuring the GSM frequency point in the second packet, the electronic device determines the start position of the second measurement GAP from the first 51 multiframe according to the position of the S frame and the preset interval.

Illustratively, according to the theoretical basis, the following steps are carried out: when the GAP period is 40ms, assuming that the electronic device measures a GSM frequency point on the GAP1, and the starting position of the GAP period corresponding to the GAP1 is exactly an F frame of 51 multiframes, since the preset interval between the GAP4 and the GAP1 is exactly 120ms, an S frame can be determined from the GAP4 according to the starting position of the GAP1 and the preset interval of 120 ms. Similarly, since the preset interval between the GAP7 and the GAP1 is just 240ms, the S frame can be determined from the GAP7 according to the start position of the GAP1 and the preset interval 240.

In the above embodiment, when the GAP period is 80ms and x/y is 1:2, the preset interval is 240ms, and when the electronic device searches for the first GSM frequency point on a second measurement GAP used for measuring the GSM frequency point in the second packet, the electronic device determines the start position of the second measurement GAP from a second 51 multiframe according to the position of the S frame and the preset interval, where the first 51 multiframe and the second 51 multiframe are two adjacent 51 multiframes.

For example, when the GAP period is 80ms, assuming that the electronic device measures a GSM frequency point on a measurement GAP indicated by the GAP1, and the starting position of the GAP period corresponding to the GAP1 is just an F frame of 51 multiframes, since the preset interval between the GAP4 and the GAP1 is just 240ms, an S frame can be determined from the GAP4 according to the starting position of the GAP1 and the preset interval 120. Similarly, since the preset interval between the GAP4 and the GAP7 is just 240ms, the first B frame after the S frame can be determined from the GAP7 according to the start position of the GAP1 and the preset interval of 240 ms.

By adopting the scheme, the electronic equipment calculates the S frame in the 51 multiframe according to the structure of the 51 multiframe and the GAP period, decodes the S frame to obtain BSIC information, further obtains a measurement result according to the BSIC information, and achieves the purpose of independent measurement of different frequencies.

Fig. 7 is a flowchart of an inter-frequency measurement method according to an embodiment of the present application, which is described from the perspective of an electronic device, and the embodiment includes:

201. the electronic device enters a connected state of the LTE master mode.

Illustratively, when the master mode is the LTE connected state, the slave mode is the GSM network mode.

202. And the electronic equipment receives the list of the frequency points to be detected sent by the network side.

Illustratively, after the electronic device receives a to-be-tested frequency point list containing at least one GSM frequency point configured at a network side, an LTE protocol stack module of the electronic device notifies the to-be-tested frequency point list to an LTE GAP scheduling module. And the LTE GAP scheduling module determines the allocation proportion according to the number of the LTE frequency points, the number of the GSM frequency points and the like.

203. The electronic device allocates 12 measurement GAPs according to the allocation ratio.

For example, an LTE GAP scheduling module on the electronic device configures 12 measurement GAPs in advance, and the electronic device allocates the 12 measurement GAPs.

Taking fig. 5A as an example, assuming that the allocation ratio is 1:2, the electronic device allocates GAP0, GAP3, GAP6, and GAP9 of the 12 GAPs to the LTE frequency point, and allocates 8 GAPs to the GSM frequency point.

It should be noted that the allocation ratio of 1:2 does not mean that only one LTE frequency point to be measured and 2 GSM frequency points to be measured are used. But means that the ratio of the number of measurement GAPs used for measuring LTE bins to the number of measurement GAPs used for measuring GSM bins is 1: 2.

204. And a GSM mode measuring module of the terminal equipment starts GSM measurement.

Illustratively, an LTE protocol stack module of the electronic device notifies a GSM mode measurement module to start measurement of a GSM frequency point. And the GSM mode measurement module in the slave mode judges whether a configured measurement GAP and a list of frequency points to be measured exist currently.

205. And the electronic equipment measures the GSM frequency point.

For example, for a specific GSM frequency point, the GSM mode measurement module of the electronic device determines whether there is a measurement result of the GSM frequency point in local historical data, and if there is no historical measurement result locally in the electronic device, the electronic device measures the GSM frequency point according to the GAP period, GAPoffset, and the like, finds an S frame, and decodes the S frame to obtain BASIC information. If the electronic device has a historical measurement result locally, finding out the S frame or the F frame related to the current measurement from the current 51 multiframe or the next 51 multiframe according to the position of the S frame or the F frame obtained by the last measurement and the preset interval of 120 ms.

Referring to fig. 5A, the electronic device allocates two thirds of the measurement GAPs to GSM frequency points, and different measurement GAPs in one group are used for measuring different GSM frequency points. In two adjacent groups, the measurement GAP interval for measuring the same GSM frequency point is 120ms, such as GAP1 and GAP 4. In 51 multiframes, one frame of 13 continuous frames is always an S frame, so after a certain GSM frequency point is measured for the first time, for example, after a certain frequency point is measured on the GAP1, the S frame on the GAP4 can be determined on the GAP4 according to the position of the S frame on the GAP1 and the interval of 120 ms.

By adopting the scheme, when the number of the GSM frequency points is large, for example, more than 3 GSM frequency points, the electronic equipment carries out measurement on the GSM frequency points according to the 51 multiframe period, the F frame position and the S frame position.

The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.

Fig. 8 is a schematic structural diagram of an inter-frequency measurement apparatus according to an embodiment of the present application. The inter-frequency measurement apparatus 100 may be implemented by software and/or hardware. As shown in fig. 8, the inter-frequency measurement apparatus 100 includes:

the receiving and sending module 11 is configured to receive a to-be-measured frequency point list sent by a network side, where the to-be-measured frequency point list includes at least one GSM frequency point;

a processing module 12, configured to determine, according to a distribution ratio, measurement GAPs used for LTE frequency point measurement and measurement GAPs used for GSM frequency point measurement from the multiple measurement GAPs, where the distribution ratio indicates a ratio between a first quantity and a second quantity, the first quantity is used to indicate the quantity of the measurement GAPs used for measuring long term evolution LTE frequency points in the multiple measurement GAPs, the second quantity is used to indicate the quantity of the measurement GAPs used for measuring GSM frequency points in the multiple measurement GAPs, the LTE frequency points are pilot frequency points, the LTE frequency points are measured on the measurement GAPs used for measuring LTE frequency points, and the GSM frequency points are measured on the measurement GAPs used for measuring GSM frequency points.

In a feasible design, when determining a measurement GAP for LTE frequency point measurement and a measurement GAP for GSM frequency point measurement from the multiple measurement GAPs, the processing module 12 is configured to divide every consecutive x + y measurement GAPs in the multiple measurement GAPs into a group to obtain multiple groups, where the distribution ratio is x/y, x is greater than or equal to 1 and is an integer, y is greater than or equal to 1 and is an integer, and x is less than y; from each set of measurement GAPs, x measurement GAPs for the LTE measurement and y measurement GAPs for the GSM measurement are determined.

In one possible design, the plurality of packets include a first packet and a second packet, and when the GSM frequency points are measured on measurement GAPs for measuring GSM frequency points, the processing module 12 is configured to measure a first GSM frequency point on a first measurement GAP for measuring GSM frequency points in the first packet, and search for the first GSM frequency point on a second measurement GAP for measuring GSM frequency points in the second packet, where an interval between the first measurement GAP and the second measurement GAP is a preset interval.

In a possible design, the transceiver module 11 is further configured to receive a GAP period and a GAP offset sent by the network side; when measuring a first GSM frequency point on a first measurement GAP used for measuring the GSM frequency point in the first packet, the processing module 12 is configured to determine, according to the GAP period and the GAP offset, an S frame corresponding to the first GSM frequency point in the first measurement GAP, where the S frame is a frame where a synchronous burst sequence in a first 51-multiframe is located, and if the S frame exists in the first measurement GAP, decode base station identity code BSIC information carried by the S frame, and measure the first GSM frequency point according to the BSIC information.

In a feasible design, the processing module 12 is further configured to determine the S frame corresponding to the first GSM frequency point in the second measurement GAP if the S frame does not exist in the first measurement GAP.

In one possible design, the period of the measurement GAP is 80ms, x is 1, y is 2, and the preset interval is 240ms, when the processing module 12 searches for the first GSM frequency point on a second measurement GAP used for measuring the GSM frequency points in the second packet, the processing module is configured to determine the start position of the second measurement GAP from a second 51 multiframe according to the position of the S frame and the preset interval, where the first 51 multiframe and the second 51 multiframe are two adjacent 51 multiframes.

In one possible design, the period of the measurement GAP includes 40ms, where x is 1, y is 2, and the preset interval is 120ms, and when the processing module 12 searches for the first GSM frequency point on a second measurement GAP used for measuring the GSM frequency points in the second packet, the processing module is configured to determine the starting position of the second measurement GAP from the first 51 multiframe according to the position of the S frame and the preset interval.

The pilot frequency measurement device provided in the embodiment of the present application can perform the actions of the electronic device in the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 9, the electronic apparatus 200 includes:

a processor 21 and a memory 22;

the memory 22 stores executable instructions;

the at least one processor 21 executes the executable instructions stored by the memory 22 so that the processor 21 performs the method as applied to the electronic device.

For a specific implementation process of the processor 21, reference may be made to the above method embodiments, which implement similar principles and technical effects, and this embodiment is not described herein again.

Optionally, the electronic device 200 further comprises a communication component 23. The processor 21, the memory 22, and the communication unit 23 may be connected by a bus 24.

Embodiments of the present application also provide a computer-readable storage medium, in which executable instructions are stored, and when executed by a processor, the executable instructions are used to implement the method applied to the electronic device.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An inter-frequency measurement method, comprising:

determining measurement GAPs for LTE frequency point measurement and measurement GAPs for GSM frequency point measurement from a plurality of measurement GAPs according to a distribution proportion, wherein the distribution proportion indicates a ratio of a first quantity and a second quantity, the first quantity is used for indicating the quantity of the measurement GAPs for measuring a Long Term Evolution (LTE) frequency point in the plurality of measurement GAPs, the second quantity is used for indicating the quantity of the measurement GAPs for measuring the GSM frequency point in the plurality of measurement GAPs, and the LTE frequency point is an pilot frequency point;

2. The method according to claim 1, wherein determining a measurement GAP for LTE frequency point measurement and a measurement GAP for GSM frequency point measurement from a plurality of measurement GAPs comprises:

3. The method of claim 2, wherein the plurality of packets comprises a first packet and a second packet, and wherein measuring the GSM frequency bins over measurement GAPs for measuring GSM frequency bins comprises:

4. The method of claim 3, wherein measuring the first GSM frequency bin over the first measurement GAP in the first packet used for measuring the GSM frequency bin comprises:

receiving the GAP period and the GAP offset sent by the network side;

5. The method of claim 4, further comprising:

6. The method according to claim 4, wherein the period of the measurement GAP is 80ms, the x is 1, the y is 2, the preset interval is 240ms, and the searching for the first GSM frequency point on a second measurement GAP used for measuring the GSM frequency points in the second packet comprises:

7. The method according to claim 4, wherein the period of measuring GAP includes 40ms, where x is 1, y is 2, the preset interval is 120ms, and searching for the first GSM frequency point on a second measurement GAP used for measuring the GSM frequency point in the second packet includes:

8. The method of any one of claims 1-7, wherein the plurality of measurement GAPs is 12 measurement GAPs.

9. An inter-frequency measurement apparatus, comprising:

the system comprises a processing module and a processing module, wherein the processing module is used for determining measurement GAPs for LTE frequency point measurement and measurement GAPs for GSM frequency point measurement from a plurality of measurement GAPs according to a distribution proportion, the distribution proportion indicates a ratio of a first quantity and a second quantity, the first quantity is used for indicating the quantity of the measurement GAPs for measuring the LTE frequency point in the measurement GAPs, the second quantity is used for indicating the quantity of the measurement GAPs for measuring the GSM frequency point in the measurement GAPs, the LTE frequency point is an abnormal frequency point, the LTE frequency point is measured on the measurement GAPs for measuring the LTE frequency point, and the GSM frequency point is measured on the measurement GAPs for measuring the GSM frequency point.

10. The apparatus of claim 9,

the processing module is used for dividing every continuous x + y measurement GAPs in the measurement GAPs into a group to obtain a plurality of groups when determining the measurement GAPs for LTE frequency point measurement and the measurement GAPs for GSM frequency point measurement from the measurement GAPs, wherein the distribution ratio is x/y, x is not less than 1 and is an integer, y is not less than 1 and is an integer, and x is less than y; from each set of measurement GAPs, x measurement GAPs for the LTE measurement and y measurement GAPs for the GSM measurement are determined.

11. The apparatus according to claim 10, wherein the plurality of packets includes a first packet and a second packet, and when measuring the GSM frequency bin on a measurement GAP for measuring a GSM frequency bin, the processing module is configured to measure a first GSM frequency bin on a first measurement GAP for measuring the GSM frequency bin in the first packet, and search for the first GSM frequency bin on a second measurement GAP for measuring the GSM frequency bin in the second packet, and an interval between the first measurement GAP and the second measurement GAP is a preset interval.

12. The apparatus of claim 11,

the receiving and sending module is further used for receiving the GAP period and the GAP offset sent by the network side;

13. The apparatus according to claim 12, wherein the processing module is further configured to determine the S frame corresponding to the first GSM frequency point in the second measurement GAP if the S frame does not exist in the first measurement GAP.

14. The apparatus of claim 12, wherein the period of the measurement GAP is 80ms, the x is 1, the y is 2, the preset interval is 240ms, and when the processing module searches for the first GSM frequency bin on a second measurement GAP used for measuring the GSM frequency bins in the second packet, the processing module is configured to determine a starting position of the second measurement GAP from a second 51 multiframe according to the position of the S frame and the preset interval, where the first 51 multiframe and the second 51 multiframe are two adjacent 51 multiframes.

15. The apparatus of claim 12, wherein the period of measuring the GAP includes 40ms, x is 1, y is 2, and the preset interval is 120ms, and the processing module, when searching for the first GSM frequency bin on a second measurement GAP used for measuring the GSM frequency bins in the second packet, is configured to determine a starting location of the second measurement GAP from the first 51 multiframe according to the location of the S frame and the preset interval.

16. The apparatus of claim 15, wherein the plurality of measurement GAPs is 12 measurement GAPs.

17. An electronic device, comprising: a memory, a processor;

a memory for storing program instructions;

a processor for invoking and executing program instructions in said memory for performing the method steps of any of claims 1-8.

18. A readable storage medium, characterized in that a computer program is stored in the readable storage medium for performing the method of any of claims 1-8.