CN102316579B - Method for applying location-based service zone - Google Patents

Abstract

The present invention provides an application method of positioning service domain LBS-zone, which can realize the indication and measurement of LBS-zone. The method includes: the serving base station BS where the mobile terminal MS is located sends an indication of the existence of LBS-zone to the MS Information: when there is an LBS-zone and the MS needs to measure the reference signal sent by the neighbor BS in the LBS-zone, the MS receives the reference signal sent by the neighbor BS on the LBS-zone for locating the MS according to the indication information signal; the MS measures the reference signal and sends the measurement result to the serving BS. Using the LBS-zone application method of the present invention, the MS can accurately know the information of the LBS-zone according to the obtained indication information, and realize the normal measurement and feedback of the measurement results for the LBS-zone, that is, the LBS-zone can be made The LBS-zone is used to achieve the purpose of the serving BS providing positioning service for the MS.

Description

An application method for positioning service domain

technical field

The invention relates to the technical field of mobile communication, in particular to an application method of a positioning service domain (LBS-zone).

Background technique

From the initial automatic vehicle positioning, to the subsequent public transportation, taxi dispatching and public security tracking, wireless positioning service technology has been widely used. With the increasing demand for location-based information services, wireless positioning service technology has also become important technologies in mobile communication systems.

In order to improve the accuracy of the positioning service of the serving base station (BS) to the mobile terminal (MS) in the mobile communication system, the concept of the positioning service domain (LBS-zone) is introduced in the IEEE 802.16m standard, and a complete LBS-zone is specified It consists of 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols, and each OFDM symbol in these 4 OFDM symbols comes from 4 consecutive superframes. For details, please refer to the schematic diagram of the system frame structure given in Figure 1 . As shown in Figure 1, the system frame is composed of several superframes with superframe headers; each superframe includes 4 frames with a length of 5 ms and a preamble sequence, wherein the preamble sequence of the second frame is The main preamble sequence, the preamble sequence of the remaining three frames is the sub-preamble sequence, and the superframe header is located after the sub-preamble sequence of the first frame; each frame is composed of 8 subframes, and the first 5 subframes represent downlink, The last three subframes represent uplink; and each subframe is composed of 6 OFDM symbols. When there is an OFDM symbol of LBS-zone in a superframe, the OFDM symbol is located in the first OFDM symbol of the first subframe in the last frame of the superframe; when a certain superframe When there is no OFDM symbol of the LBS-zone, the first OFDM symbol of the first subframe in the last frame of the superframe can be used as a synchronization symbol or as a data symbol for practical application prevail.

However, the current IEEE 802.16m standard only provides the concept of LBS-zone, and does not give the specific application of LBS-zone. MS cannot accurately obtain the information of LBS-zone, and it cannot perform normal operations on LBS-zone. Measurement and feedback of measurement results, that is, the LBS-zone cannot work normally, so that the purpose of realizing the positioning service for the MS by the serving BS through the LBS-zone cannot be achieved.

Contents of the invention

In view of this, the present invention provides a positioning service domain (LBS-zone) application method, so that the MS can accurately know the information of the LBS-zone, and realize the normal measurement and feedback of the measurement results for the LBS-zone, that is, the ability to The LBS-zone is applied, and then the serving BS can provide positioning service for the MS through the LBS-zone.

In order to achieve the above object, the technical scheme proposed by the present invention is:

An application method of a location service domain LBS-zone, the method comprising:

The serving base station BS where the mobile terminal MS is located sends the indication information of the existence of the LBS-zone to the MS;

The MS receives, on the LBS-zone, a reference signal for locating the MS sent by a neighbor BS according to the indication information;

The MS measures the reference signal and sends the measurement result to the serving BS.

Preferably, the serving BS sending the indication information of the existence of the LBS-zone to the MS is: the superframe header sent by the serving BS to the MS carries the indication information of the existence of the LBS-zone.

Before the MS receives a reference signal for positioning the MS sent by a neighbor BS on the LBS-zone according to the indication information, the method further includes:

The serving BS sends a scan response SCN-RSP signaling to the MS to trigger the MS to scan the reference signal transmitted by the neighbor BS of the LBS-zone;

The MS receives broadcast signaling carrying LBS-zone information sent by the serving BS.

Before the MS receives a reference signal for positioning the MS sent by a neighbor BS on the LBS-zone according to the indication information, the method further includes:

The MS receives the broadcast information carrying the LBS-zone information sent by the serving BS;

The serving BS sends a scan response SCN-RSP signaling to the MS to trigger the MS to scan the reference signals sent by neighbor BSs in the LBS-zone.

The broadcast information carrying the LBS-zone information is sent to the MS through the system configuration description AAI_SCD signaling.

The broadcast information carrying the LBS-zone information is sent to the MS through a superframe header.

The trigger information carried in the SCN-RSP signaling is the measurement duration of the LBS-zone.

After the MS measures the reference signal, before sending the measurement result to the serving BS, the method further includes:

The serving BS sends a secondary preamble to the MS;

The MS measures the received secondary preamble.

The LBS-zone information carried in the broadcast information is the period of the LBS-zone, or the period and duration of the LBS-zone, or the starting point, period and duration of the LBS-zone.

When the LBS-zone information carried in the broadcast signaling is the period of the LBS-zone, or the period and duration of the LBS-zone, the starting point of the LBS-zone is calculated by the following formula:

N _startpoint = N _{AAI_SCD} + m × N _offset - mod(N _{AAI_SCD} , m),

Wherein, the N _startpoint indicates the superframe number where the starting point of the LBS-zone is located, the N _{AAI_SCD} indicates the superframe index where the AAI-SCD signaling is located, and the m is the superframe occupied by a complete LBS-zone The N _offset refers to the large-scale offset between the starting point of the LBS-zone and the superframe index where the AAI-SCD signaling is located, and the mod(N _{AAI_SCD} , m) is the remainder of dividing N _{AAI_SCD} by m .

The m=4.

When the LBS-zone information carried in the superframe header subpackage SPx is the period of the LBS-zone, or the period and duration of the LBS-zone, the starting point of the LBS-zone is calculated by the following formula,

N _startpoint = mod(( _NS-SFH(SPx) +Q-mod( _NS-SFH(SPx) , Q)), 2 ⁿ ),

Wherein, the N _startpoint represents the superframe number where the starting point of the LBS-zone is located, and the N _S-SFN(SPx) represents the superframe header SPx containing initial LBS-zone parameters or configuration information or containing the LBS-zone The parameters of the zone or the superframe index where the superframe header SPx of the configuration change information is located, the Q is the period in which the LBS-zone occurs, and the mod( _NS-SFN(SPx) , Q) is the pair of _{NS-SFN( SPx)} divide by Q and take the remainder, and the n represents the bit length used for the superframe index.

In summary, the LBS-zone application method adopted by the present invention is to send the indication information of the existence of LBS-zone to the MS by the serving BS where the MS is located; when there is an LBS-zone and the MS measures the LBS-zone When the reference signal sent by the neighbor BS is in the middle, the MS receives the reference signal sent by the neighbor BS on the LBS-zone for positioning the MS according to the indication information; the MS measures the reference signal, and The measurement results are sent to the serving BS. In this way, the MS can accurately know the information of the LBS-zone according to the obtained indication information, realize the normal measurement of the LBS-zone and feedback the measurement results, that is, the LBS-zone can be applied, and then the service can be realized through the LBS-zone The purpose of the BS to perform location services for the MS.

Description of drawings

Fig. 1 is a schematic diagram of the system frame structure in the existing IEEE 802.16m standard;

Fig. 2 is a working flow diagram of an LBS-zone application method according to an embodiment of the present invention;

Figure 3 is a schematic diagram of the parameter description of the LBS zone scan duration;

Fig. 4 is a schematic diagram of the design of the LBS-zone starting point of the present invention;

Fig. 5 is the working flowchart of the LBS-zone application method of the second embodiment of the present invention;

Fig. 6 is a working flow chart of the LBS-zone application method of the third embodiment of the present invention;

FIG. 7 is a schematic diagram of the principle that the serving BS periodically sends a superframe header to the MS;

FIG. 8 is a schematic diagram of placing 2-bit indication information in SP1 for periodic transmission according to the present invention;

FIG. 9 is a schematic diagram of the principle of sending in the manner shown in FIG. 6 .

Detailed ways

In order to solve the problems existing in the prior art, the present invention proposes an application method of LBS-zone, that is, the serving BS where the MS is located sends the indication information of the existence of the LBS-zone to the MS; when there is the LBS-zone, And when the MS measures the reference signal sent by the neighbor BS in the LBS-zone, the MS receives the reference signal sent by the neighbor BS on the LBS-zone for positioning the MS according to the indication information; The signal is measured and the measurement result is sent to the serving BS. In this way, the MS can accurately know the information of the LBS-zone according to the obtained indication information, realize the normal measurement of the LBS-zone and feedback the measurement results, that is, the LBS-zone can be applied, and then the service can be realized through the LBS-zone The purpose of the BS to perform location services for the MS.

Before introducing the specific implementation scheme, it should be noted that in order to realize the positioning service of the MS by the serving BS through the LBS-zone, the MS needs to know whether there is an LBS-zone; when there is an LBS-zone and the MS measures the LBS-zone When the reference signal sent by the neighbor BS is used, the MS receives and measures the reference signal sent by the neighbor BS on the LBS-zone for the positioning service of the MS, so as to realize the positioning service for the MS.

Based on the above introduction, the specific realization of the scheme of the present invention includes:

The serving BS where the MS is located sends to the MS indication information indicating that there is an LBS-zone; the MS receives a reference signal for locating the MS sent by a neighbor BS on the LBS-zone according to the indication information; the The MS measures the reference signal and sends the measurement result to the serving BS.

In the present invention, the indication information of the existence of LBS-zone can be realized in three ways, that is, by sending broadcast information from the serving BS to the MS, or by adding indication information in the superframe header, or by sending the MS to the MS from the serving BS. The combination of broadcasting information and adding indication information in the superframe header.

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one

In this embodiment, when the serving BS sends broadcast information to the MS, after receiving the broadcast information, the MS obtains the location, period, or duration of the LBS-zone by analyzing the broadcast information, and further, the MS measures each neighbor in the LBS-zone The reference signal sent by the BS, and the measurement result is sent to the serving BS. Refer to FIG. 2 for the specific implementation process. As shown in Figure 2, the process includes the following steps:

Step 201: The serving BS sends signaling to the MS for triggering the MS to scan the reference signals sent by neighbor BSs in the LBS-zone.

In this step, the scanning response (SCN-RSP) signaling is used to trigger the MS to scan the reference signal transmitted by the neighboring BS of the LBS-zone. In practice, other signaling can also be used to trigger the trigger, so as not to affect the embodiment of the present invention. implementation shall prevail.

It should be noted that in this step, the specific format of the SCN-RSP signaling can be referred to in Table 1 below, which includes the following 6 indication units: scan LBS-zone indication, scan LBS-zone duration, scan report mode, Report parameters, report period, and the starting superframe number of anchor scanning.

Table 1

Among them, the report parameters include relative time delay, mean value of carrier-to-interference-to-noise ratio (CINR mean) and mean value of received signal strength indicator ratio (RSSI mean), and start scanning at a fixed position or agree to be in the nearest LBS-zone near the SCN-RSP In this case, the initial superframe number of anchor scanning can be omitted, and can be calculated by the following formula,

N _startpoint =N _{AAI_SCD} +4×N _offset -mod(N _{AAI_SCD} , 4),

Among them, N _startpoint indicates the superframe number where the starting point of the LBS-zone is located, N _{AAI_SCD} indicates the superframe index where the AAI-SCD signaling is located, and N _offset refers to the starting point of the LBS-zone and the superframe where the AAI-SCD signaling is located The large-scale offset between the indexes, and the difference modulo 4 between the starting point of the LBS-zone and the AAI-SCD signaling is N _offset , and the mod( _{NAAI_SCD} , 4) is the modulus of dividing N _{AAI_SCD} by 4.

Alternatively, when N _offset is determined, taking N _offset =1 as an example, the starting point of scanning can be calculated by the formula N _startpoint = _{NAAI_SCD} +4-mod( _{NAAI_SCD} , 4).

It should be noted that 4 in the above formula refers to the number of superframes occupied by a complete LBS-zone. When the number of superframes occupied by a complete LBS-zone is other values, 4 in the above formula should also be this value.

Alternatively, when the LBS-zone information carried in the subpacket (SPx) of the superframe header is the period of the LBS-zone, or the period and duration of the LBS-zone, the starting point of the LBS-zone is calculated by the following formula ,

N _startpoint = mod(( _NS-SFH(SPx) +Q-mod( _NS-SFH(SPx) , Q)), 2 ⁿ ),

Wherein, the N _startpoint represents the superframe number at which the starting point of the LBS-zone is located, and the N _{S-SFN (SPx)} represents parameters or configuration information (period, duration, etc.) including the first (initial) LBS-zone The superframe header SPx or the superframe index where the superframe header SPx contains the parameters of the LBS-zone or the configuration change information (such as: when the cycle changes), and the Q is the cycle that the LBS-zone occurs (the number of superframes is unit), the mod( _NS-SFN(SPx) , Q) is the remainder of dividing Q by _NS-SFN(SPx) , and the n represents the bit length used by the superframe index.

In order to more clearly illustrate the LBS zone scan duration in Table 1, Figure 3 shows the parameter description diagram of the LBS zone scan duration. As shown in Figure 3, there are two main scanning durations, one is the total MS scanning LBS-zone duration, this duration mainly specifies the LBS zone that the MS needs to scan within this time period (LBS zone is once or periodically appears); the second scan duration refers to the time the MS actually needs to scan. In order to scan only the reference signal in an LBS-zone, the MS scan duration can be set to one symbol or at least one subframe (the subframe containing the reference signal frame, or include a subframe containing a reference signal and several adjacent subframes).

It should also be noted that in this step, in order to obtain the signal arrival time between the serving BS and the MS, the MS also needs to scan the secondary preamble of the serving BS.

After performing the operations in this step, the MS needs to wait for step 202 until it receives the broadcast signaling sent by the serving BS, and then scans for reference signals sent by neighbor BSs of the LBS-zone.

Step 202: The MS receives the broadcast information carrying the LBS-zone information sent by the serving BS, so as to know the specific location of the LBS-zone.

In this step, the broadcast information is sent to the MS through the system configuration description (AAI_SCD) signaling, and other signaling can also be used to send the broadcast information in practice.

It should be noted that, in this step, the LBS-zone information carried in the broadcast information may include the starting point, period and duration of the LBS-zone, or only include the period and duration of the LBS-zone, and the MS may receive The received LBS-zone information is used to calculate the starting point of the LBS-zone, or only the period of the LBS-zone is included, and the MS calculates the starting point of the LBS-zone according to the received LBS-zone information, and passes the starting point and the broadcast information The end point information contained in gets the duration of the LBS-zone. The starting point of the LBS-zone is relative to the superframe where the broadcast information is located, and is used to clarify the starting position of the LBS-zone; the cycle of the LBS-zone refers to how often the LBS-zone will appear once. That is, the LBS-zone is sent periodically; the duration of the LBS-zone refers to the time when the LBS-zone appears within a period of time. After specifying the period and duration of the LBS-zone, the MS can scan only when the LBS-zone appears, thus saving the loss caused by the scan. When the starting point of the LBS-zone is included in the broadcast information, refer to Table 2 for the specific content of the broadcast information; when the starting point of the LBS-zone is not included in the broadcast information, refer to Table 3 for the specific content of the broadcast information.

Table 2

table 3

It should also be noted that, in this step, when the starting point of the LBS-zone is not included in the broadcast signaling, the starting point of the LBS-zone can be calculated as shown in FIG. 4 . As shown in Figure 4, when the MS receives a superframe with an LBS-zone, the starting point of the LBS-zone can be calculated according to the superframe number using the following formula,

N _startpoint =N _{AAI_SCD} +4×N _offset -mod(N _{AAI_SCD} , 4),

Among them, N _startpoint indicates the superframe number where the starting point of the LBS-zone is located, N _{AAI_SCD} indicates the superframe index where the AAI-SCD signaling is located, and N _offset refers to the starting point of the LBS-zone and the superframe where the AAI-SCD signaling is located The large-scale offset between the indexes, and the difference modulo 4 between the starting point of the LBS-zone and the AAI-SCD signaling is N _offset , and the mod( _{NAAI_SCD} , 4) is the modulus of dividing N _{AAI_SCD} by 4.

Alternatively, when N _offset is determined, taking N _offset =1 as an example, the starting point of scanning can be calculated by the formula N _startpoint = _{NAAI_SCD} +4-mod( _{NAAI_SCD} , 4).

Similarly, 4 in the above formula also refers to the number of superframes occupied by a complete LBS-zone. When the number of superframes occupied by a complete LBS-zone is other values, 4 in the above formula should also be the value.

It should be noted that when the modulo 4 of the superframe where the AAI-SCD signaling is located is zero, at least the next superframe whose modulo 4 is zero also needs to be used as the superframe where the starting point of the LBS-zone is located.

Alternatively, when the LBS-zone information carried in the subpacket (SPx) of the superframe header is the period of the LBS-zone, or the period and duration of the LBS-zone, the starting point of the LBS-zone is calculated by the following formula ,

N _startpoint = mod(( _NS-SFH(SPx) +Q-mod( _NS-SFH(SPx) , Q)), 2 ⁿ ),

Wherein, the N _startpoint represents the superframe number at which the starting point of the LBS-zone is located, and the N _{S-SFN (SPx)} represents parameters or configuration information (period, duration, etc.) including the first (initial) LBS-zone The superframe header SPx or the superframe index where the superframe header SPx contains the parameters of the LBS-zone or the configuration change information (such as: when the cycle changes), and the Q is the cycle that the LBS-zone occurs (the number of superframes is unit), the mod( _NS-SFN(SPx) , Q) is the remainder of dividing Q by _NS-SFN(SPx) , and the n represents the bit length used by the superframe index.

After calculating the superframe number where the starting point of the LBS-zone is located, the starting point of the LBS-zone can be obtained according to the calculated superframe number.

Step 203: each neighboring BS sends a reference signal on the OFDM symbol occupied by the LBS-zone in the superframe, wherein the reference signal is sent by code division multiple access (CDMA) or an orthogonal sequence.

Step 204: The MS scans and measures the reference signals sent by each neighbor BS respectively, and obtains the signal arrival time, CINR mean and RSSI mean of each neighbor BS.

In this step, the MS scans and measures the reference signal to obtain the signal arrival time of each neighboring BS, which is a prior art, and will not be repeated here.

It should be noted that, in this step, the MS measurement reference signal may be measured by the MS when the serving BS needs MS measurement, or it may be that the MS itself actively measures the reference signal sent by each neighbor BS.

Step 205: The serving BS sends the secondary preamble to the MS.

Step 206: The MS measures the secondary preamble sent by the serving BS, and obtains the signal arrival time, CINR mean and RSSI mean of the serving BS.

Step 207: The MS calculates the difference between the signal arrival time of the serving BS and the signal arrival time of each neighboring BS, and obtains the relative time delay between the serving BS signal and the signal arrival time of each neighboring BS.

In this step, if the arrival time of the signal of the neighbor BS1 is t1, the arrival time of the signal of the neighbor BS2 is t2, and the arrival time of the signal of the serving BS is t, then the obtained relative delays Δt1 and Δt2 are respectively:

Δt1=t-t1, Δt2=t-t2.

Step 208: The MS sends the calculated relative delay, CINR mean and RSSI mean to the serving BS.

The serving BS obtains the relative delay, CINR mean and RSSI mean, and can select the neighbor BS with better signal as the candidate BS to provide positioning service for the MS according to the obtained above results.

In this step, the MS sends the calculated and measured results to the serving BS through scanning report (SCN-REP) signaling. For details of the SCN-REP signaling, refer to Table 4.

Table 4

It should be noted that in this step, the MS may also send the calculation and measurement results to the serving BS through other signaling, as long as the implementation of the embodiment of the present invention is not affected.

So far, the entire workflow of applying the LBS-zone used in this embodiment is completed.

It should be noted that, in this embodiment, the MS may only measure the reference signal sent by the neighbor BS once, and may also periodically measure and report the reference signal sent by the neighbor BS, depending on actual needs.

Embodiment two

Same as the first embodiment, in this embodiment, the serving BS also sends broadcast signaling to the MS. The difference from Embodiment 1 is that in this embodiment, the MS first receives the broadcast signaling sent by the serving BS through the AAI_SCD signaling, and after receiving the SCN-RSP signaling, then according to the LBS- The zone information scans and measures the reference signal sent by each neighboring BS of the LBS-zone, and the specific process can be referred to in FIG. 5 . As shown in Figure 5, the process includes the following steps:

Step 501: The MS receives the broadcast information carrying the LBS-zone information sent by the serving BS.

In this step, the broadcast information is also sent to the MS through the system configuration description (AAI_SCD) signaling. In practice, other signaling can also be used to send the broadcast information, as long as the implementation of the embodiment of the present invention is not affected.

Table 2 and Table 3 can also be used for the specific content of the broadcast signaling used in this step, and the specific processing process is the same as step 202, and will not be repeated here.

Step 502: The serving BS sends a scanning response (SCN-RSP) signaling to the MS to trigger the MS to scan the reference signals transmitted by neighbor BSs in the LBS-zone.

In this step, the specific format of the SCN-RSP signaling can also be referred to Table 1, and will not be repeated here.

Similarly, in this step, the MS also needs to scan the secondary preamble of the serving BS.

Steps 503-508: the specific operations are the same as steps 203-208, and will not be repeated here.

So far, the entire workflow of applying the LBS-zone used in this embodiment is completed.

It should be noted that, as in the first embodiment, in this embodiment, the MS may only measure the reference signal sent by the neighbor BS once, or periodically measure and report the reference signal sent by the neighbor BS, so as to realize need prevail.

It should also be noted that, in this embodiment, after the MS receives the SCN-RSP signaling, the basic principle of the measurement reference signal to start scanning is: from the next LBS-zone of the superframe where the SCN-RSP signaling is located In other words, regardless of whether the first OFDM symbol of the LBS-zone exists in the superframe where the SCN-RSP signaling is located, it must start from the first OFDM symbol of the next LBS-zone. The symbol starts to scan.

Embodiment three

Same as Embodiments 1 and 2, in this embodiment, the serving BS sends broadcast information to the MS, and the same thing as Embodiment 2 is that in this embodiment, the MS first receives the broadcast information sent by the MS. The broadcast information sent by the serving BS is different in that, in this embodiment, the broadcast information is sent out by being carried in a superframe header, and its specific working process can be referred to FIG. 6 , which will not be repeated here.

Embodiment Four

Different from Embodiments 1, 2 and 3, in this embodiment, it is realized by adding indication information in the superframe header. Among them, there are two forms of superframe headers, one is the main superframe header, and the other is the sub-superframe header. The main superframe header is mainly used to indicate the period of the sub-superframe header. Based on the difference in period, The secondary superframe header can be further divided into three types of subpackets, which are (SP)1, SP2 and SP3, respectively, see FIG. 7 for details. As shown in FIG. 7 , the period of the SP1 subpacket is 40ms, the period of the SP2 subpacket is 80ms, and the period of the SP3 subpacket is 160ms or 320ms.

In this embodiment, the indication information may adopt 1 bit, 2 bits, or multiple bits, etc., and the indication information may be located in SP1, SP2 or SP3, and the specific implementation processes thereof are described below respectively.

When the indication information is located in SP1, its specific content can be referred to Table 5, which will be introduced in detail below.

When 1 bit is used as the indication information, it indicates whether the current superframe and the next superframe of the current superframe contain OFDM symbols of LBS-zone, so at least two SP1 indications are required to combine a complete LBS-zone zone. At this point, the MS can first unpack the first SP1, and then unpack the main superframe header to see if there is any change in SP1. If there is no change, the bit indication of SP1 has not changed. OFDM symbols containing LBS-zone;

table 5

When 2 bits are used as the indication information, the 2 bits are used to indicate whether the current superframe and the next three superframes of the current superframe contain OFDM symbols of LBS-zone. The specific implementation process can be found in picture. As shown in Figure 8, two bits are used in SP1 to indicate the LBS-zone, and the duration of the LBS-zone is 1/2 of the period of SP1, where the first bit indicates whether the current superframe of SP1 and the following superframe It contains the OFDM symbol of the LBS-zone, and the second bit indicates whether the superframe where the next SP1 is located and whether the subsequent superframe contains the OFDM symbol of the LBS-zone. For example, when the indication is 11, it can be judged that there will be OFDM symbols of the LBS-zone in the continuous SP1 and the subsequent 3 consecutive superframes, and the MS can perform a complete scan without starting from the LBS-zone Scanning starts at the head, which reduces measurement delay. As shown in Figure 9, when there are two consecutive LBS-zones, the MS can start scanning for four consecutive superframes from any position in the LBS-zone, that is, as long as the OFDM symbols of four LBS-zones are continuously scanned. Yes, that is, the MS can scan in the order of 1234 or in the order of 3412, where 1, 2, 3 and 4 represent the positions of the OFDM symbols of the LBS-zone.

When the indication information is located in SP2, its specific content can be referred to Table 6, which will be introduced in detail below.

When 1 bit is used as the indication information, the 1 bit is used to indicate whether the current superframe and the next three superframes of the current superframe include the OFDM symbol of LBS-zone, which means that the superframe where SP2 is located And whether OFDM symbols of LBS-zone are included in the next 3 superframes, and can form a complete LBS-zone;

Table 6

When 2bit is used as the indication information, the 2bit is used to indicate whether the current superframe and the subsequent seven superframes of the current superframe include OFDM symbols of LBS-zone, wherein the first bit indicates the current Whether the superframe where SP2 is located and the next three consecutive superframes contain LBS-zone OFDM symbols, the second bit indicates whether the next superframe where SP2 is located and the next three consecutive superframes contain LBS-zone The OFDM symbol of the zone, the superframe where the current SP2 is located, and the following three consecutive superframes can form a complete LBS-zone. In this embodiment, the MS must demodulate SP2 to obtain the superframe where the current SP2 is located and whether the next three consecutive superframes contain LBS-zone OFDM symbols. If the MS demodulates the indication information contained in SP2 to be 11 , then MS can scan 4 superframes continuously at the superframe where SP2 is located and any one of the following 3 consecutive superframes to complete a complete LBS-zone scan; if the MS does not read SP2, then the MS must The LBS-zone information cannot be known until SP2 is read, and the scanning delay is at most 3 superframes.

When the indication information is located in SP3, its specific content can be referred to Table 7, which will be introduced in detail below.

When 1 bit is used as the indication information, the 1 bit is used to indicate whether the current superframe and the subsequent 7 or 15 superframes of the current superframe include OFDM symbols of the LBS-zone. Because the period of SP3 is relatively long, which is 160ms or 320ms, that is, it can contain up to 4 consecutive LBS-zones. Therefore, the specific meaning of this 1 bit can be: between two SP3s contains 2 or 4 consecutive LBS-zones. LBS-zone; or, it means that there is an LBS-zone between two SP3s, and the location of this LBS-zone can be agreed in advance, such as the current frame of SP3 and the subsequent three consecutive superframes, in practice, the The implementation that does not affect the embodiment of the present invention shall prevail;

Table 7

When 2 bits are used as the indication information, the 2 bits are used to indicate whether the current superframe and the subsequent 15 or 31 superframes of the current superframe include OFDM symbols of the LBS-zone. Because the interval between two SP3s is relatively large, there are many specific meanings expressed by these two bits: the first one is that the first bit indicates the superframe where the current SP3 is located and whether the subsequent three superframes contain LBS-zone OFDM Symbol, the second bit indicates whether there is an LBS-zone between the current SP3 and the next SP3. If the bit indicates 0, it indicates that there is only one LBS-zone. If the bit indicates 1, it indicates that there will be two consecutive LBS-zones. LBS-zone or 4 LBS-zones, that is, each superframe between two SP3s contains LBS-zone OFDM symbols; the second is whether the first bit contains LBS between the current SP3 and the next SP3 -zone, if this bit is 1, it means that there is an LBS-zone during this period (the starting point can be agreed or calculated), and it can also indicate that there will be continuous LBS-zones during this period, and the second bit represents the next one Whether there is an LBS-zone between SP3 and the next SP3 (the starting point can be agreed or calculated), it can also indicate that there will be continuous LBS-zones during this period.

It should be noted that after the judgment of the existence of LBS-zone is completed by adding indication information in the superframe header, the subsequent processing flow is the same as that of Embodiment 1, Embodiment 2 and Embodiment 3, and will not be repeated here. repeat.

Embodiment five

In this embodiment, it is judged whether there is an LBS-zone through the combination of sending broadcast information from the serving BS to the MS and adding indication information in the superframe header, specifically: first carry the LBS in the broadcast signaling -zone information, if the MS does not read the broadcast information or does not read the broadcast information, then the MS judges whether the LBS-zone exists in the current superframe and the subsequent superframe through the indication information of the superframe header, thereby reducing the number of MS measurement delay, and the MS can also start measurement from any position in the LBS-zone.

The specific processing flow of this embodiment may be combined with Embodiment 1 and Embodiment 4, or Embodiment 2 and Embodiment 4, or Embodiment 3 and Embodiment 4, and will not be repeated here.

In a word, the application method of LBS-zone used in the present invention is to send the indication information of the existence of LBS-zone to the MS by the serving BS where the MS is located; when there is an LBS-zone and the MS measures the neighbor BS in the LBS-zone When the reference signal is sent, the MS receives the reference signal sent by the neighbor BS on the LBS-zone for locating the MS according to the indication information; then the MS measures the reference signal, and measures The result is sent to the serving BS, so that the MS can accurately know the information of the LBS-zone according to the obtained indication information, and realize the normal measurement of the LBS-zone and the feedback of the measurement results, that is, the LBS-zone can be applied, and then The purpose of realizing the positioning service for the MS by the serving BS through the LBS-zone is achieved.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (9)

1. an application method of location service domain LBS-zone, it is characterized in that, the method comprises: The mobile terminal MS receives indication information indicating that there is an LBS-zone from the serving base station BS where the MS is located; the indication information includes at least the period of the LBS-zone; The MS is triggered to scan the reference signal transmitted by the neighbor BS of the LBS-zone according to the scanning response SCN-RSP signaling sent by the serving BS, and the MS receives the LBS-zone information sent by the serving BS, wherein the The LBS-zone information is the period of the LBS-zone, or the period and duration of the LBS-zone, or the starting point, period and duration of the LBS-zone; The MS receives, on the LBS-zone, a reference signal for locating the MS sent by a neighbor BS according to the indication information; The MS measures the reference signal and sends the measurement result to the serving BS. 2. The method according to claim 1, wherein the indication information of the existence of the LBS-zone sent by the serving BS to the MS is: the superframe header sent by the serving BS to the MS carries the existence of the LBS-zone instructions for the . 3. The method according to claim 1 or 2, wherein the LBS-zone information is carried in broadcast information and sent to the MS through system configuration description AAI_SCD signaling. 4. The method according to claim 1 or 2, wherein the LBS-zone information is carried in the broadcast information and sent to the MS through a superframe header. 5. The method according to claim 4, wherein the trigger information carried in the SCN-RSP signaling is the measurement duration of the LBS-zone. 6. The method according to claim 1, wherein after the MS measures the reference signal and before sending the measurement result to the serving BS, the method further comprises: The serving BS sends a secondary preamble to the MS; The MS measures the received secondary preamble. 7. The method according to claim 1, wherein when the LBS-zone information is the period of the LBS-zone, or the period and duration of the LBS-zone, the starting point of the LBS-zone is determined by the following formula Calculated to get: N _startpoint =N _{AAI_SCD} +m×N _offset -mod(N _{AAI_SCD} ,m), Wherein, the Nstartpoint represents the superframe number where the starting point of the LBS-zone is located, the NAAI_SCD represents the superframe index where the AAI-SCD signaling is located, and the m is the number of superframes occupied by a complete LBS-zone, The Noffset refers to the large-scale offset between the starting point of the LBS-zone and the superframe index where the AAI-SCD signaling is located, and the mod(NAAI_SCD, m) is the remainder of dividing NAAI_SCD by m. 8. The method according to claim 7, wherein m=4. 9. The method according to claim 1, wherein, when the LBS-zone information carried in the superframe header subpackage SPx is the period of the LBS-zone, or the period and duration of the LBS-zone, the LBS-zone The starting point of is calculated by the following formula, N _startpoint = mod(( _NS-SFH(SPx) +Q-mod( _NS-SFH(SPx) ,Q)), ²ⁿ ), Wherein, the Nstartpoint represents the superframe number at which the starting point of the LBS-zone is located, and the NS-SFN (SPx) represents the superframe header SPx containing the parameters or configuration information of the initial LBS-zone or containing the parameters of the LBS-zone Or configure the superframe index where the superframe header SPx of the change information is located, the Q is the period in which the LBS-zone occurs, and the mod(NS-SFN(SPx), Q) is to divide the NS-SFN(SPx) by Q In addition, the n represents the bit length used for the superframe index.