JP2001527316A - Apparatus and method for signal detection by a base station in a mobile communication system - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention provides a mobile terminal (120), at least one first base station (104) serving the mobile terminal (120), and at least one second base station. (108) a method for detecting a signal in a communication network (100) (e.g., cellular) comprising a second base station for increasing detection of transmitted data by the second base station. A method is provided that includes mobile transmission data detected at a first base station.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a method and apparatus for signal detection, and more particularly, to a method and apparatus for signal detection in a cellular communication network that requires location information and fast handoff operations.

[0002] In a cellular communication network such as IS95, closed and open loop transmission power control is possible in a mobile terminal capable of communicating with a base station. This means that at the serving base station, the received signal level is an almost constant minimum level for proper detection and the transmission power of the mobile terminal to be set to the desired quality of the communication link Is optimized. If the mobile terminal is able to communicate with more than one serving base station, as in a soft handoff time, for example, the combined power, or the strongest received signal (or a combination of these two techniques), will Is kept at a nearly constant minimum level of proper detection set by the desired quality of This power control mechanism minimizes multiple access interference caused by mobile terminals inside and outside the cell covered by the serving base station.

[0003] Power control is desirable, and direct spreading code division multiple access (DS-CDMA).
Although this is essential even in a system such as), this degrades the capability of the base station and provides a service to a specific mobile terminal to receive and detect the transmission of the mobile terminal appropriately and with high reliability. Will be gone. It is desirable for services such as "location" and "handoff" operations to detect mobile terminal transmissions with high reliability by base stations other than the serving base station. Therefore, without increasing the transmission power of the mobile terminal, the detection capability of the non-serving base station is increased, and the information such as the propagation time delay (distance) and the mobile terminal signal power strength can be used to properly detect information data. It is desirable to be able to obtain a received signal that is significantly lower than the minimum required level.

The present invention preferably increases the ability to detect mobile terminal transmitted signals by a cellular communication network or to detect signals transmitted by first and second base stations and detected by a mobile terminal. It is intended for.

Accordingly, in a first aspect of the present invention, a communication network comprising a mobile terminal, at least one first base station serving the mobile terminal, and at least one second base station ( Example: A method for detecting a signal at a cellular base station, wherein mobile transmission data detected at a first base station is used by a second base station to increase the detection of transmission data by a second base station. A method is provided.

[0006] Preferably, the signal received by the first base station is of sufficient quality to enable detection of the data transmitted by the signal. More preferably, the detected data is used by a second base station, wherein the transmission of the mobile terminal comprises:
Data is not received with sufficient power for proper detection to enable detection of data by the second base station.

[0007] The detection process of the second base station may be based on serial correlation, matched filter correlation, maximum probability sequence estimation, joint or multi-user detection, or any combination thereof.

[0008] The detecting step at the second base station preferably comprises detecting the presence of the data detected at the first base station. The detecting step at the second base station preferably includes detecting and calculating a reception time delay due to signal propagation due to the distance of the mobile terminal from the corresponding base station.

[0009] The detecting step at the second base station may additionally or alternatively include detecting the received signal power of the mobile terminal transmission signal by the second base station. Preferably, the mobile terminal is served by a first base station on a communication channel. More preferably, the communication channel is a traffic channel, a connection channel or a control channel operable in a packet or circuit switching mode.

[0010] The communication network is preferably a cellular communication direct spread code division multiple access (D
S-CDMA) system, preferably extending and increasing receiver processing acquisition by utilizing data to allow longer integration times at the base station. More preferably, the network system is a GSM or GSM derived system.

The position of the mobile terminal may be, for example, using the reception time delay at each base station, using the direction of the mobile terminal from each base station, using the direction of the mobile terminal from each base station, or , The reception time delay and / or the direction of the mobile terminal from the first base station and the reception time delay and / or the direction of the mobile terminal from the second base station can be determined from the network system. .

[0012] Determining the location of a mobile terminal using three or more known base stations is known in the art as triangulation or triangulation. Preferably, the data received by at least the first base station is capable of identifying the mobile terminal in the network system.

[0013] The measured signal power of the mobile terminal can be used for handoff preparation from the first base station to the second base station. Preferably, the data transmitted by the mobile terminal is unknown information data. Alternatively or additionally, the data transmitted by the mobile terminal is preferably a predefined sequence.

Detecting data transmitted by a mobile station using data received by a first base station with, or instead of, a second base station at the base station Can be improved.

[0015] Preferably, spatial filtering is used at the second base station to reduce the effect of the propagation channel on the received signal. According to a second aspect of the present invention, there is provided a system for detecting a signal in a communication network (e.g., cellular) including a plurality of base stations and mobile terminals, wherein at a particular time at least one of the base stations is provided. Is a serving base station, the mobile terminal is served by the serving base station, and the serving base station can receive and detect data transmitted to it by the mobile terminal, and A system is provided wherein the data can be used by a serving base station and / or at least one other base station to increase detection of transmitted data.

Embodiments of the present invention will be described by way of example only with reference to the accompanying drawings. Cellular system 1 installed in a geographical area such as city center 102 as an example
00 (FIG. 1) is a first base station 104 having a first associated coverage area 106.
, A second base station 108 having a second associated coverage area 110, and a third base station 107 having an associated coverage area 111.

The first, second, and third base stations 104, 108, 107 are independently connected to a base station controller (BSC) 112 that is connected to a mobile switching center (MSC) 114. . The MSC 114 is connected to the fixed terminal 1 via a public switched telephone network (PSTN) 118.
16 can be communicated.

As an example of the first, second, and third base stations 104, 108, 107, a supercell manufactured by Motorola (Supercell)
11) There is a unit of the (TM) base station. The supercell base station has appropriately modified hardware and / or software to work with the time delay estimation units 220,320. The mobile terminal 120 has the first coverage area 10
6 and is located in the second coverage area 110, but it is not necessary that the mobile terminal 120 be located in the second coverage area 110. The mobile terminal 120 can be placed near the second and third coverage areas 110,111.

An example of a mobile terminal is a model QCP manufactured by Qualcomm.
/ 820 mobile phone. Referring to FIG. 2, the first base station 104 has a receive chain 200. Receive chain 200 has an antenna 202 coupled to a low noise amplifier 204.
Low noise amplifier 204 is coupled to bandpass filter 206. Bandpass filter 206 is coupled to mixer 208. Mixer 208 is low-pass filter 2
12 and the synthesizer unit 210. The low pass filter 212 is coupled via a buffer 216 to an analog to digital converter (ADC) 214 which is coupled to a digital signal processor (DSP) 218.

Buffer 216 is further coupled to delay estimation unit 220. Delay estimation unit 220 is further coupled to DSP 218. The buffer output is coupled to multiplier 222 within delay estimation unit 220. Multiplier 222 is coupled to integrator 224 and variable delay unit 226. The integrator unit 224 includes the peak detector 23
0, integrated over the transmission symbol time Ts, which is set to the initial value 0 at the beginning of each correction operation, ie, at the beginning of each received data symbol. The output of peak detector 230 is coupled to processor 232. Variable delay unit 226 is coupled to both processor 232 and sign unit 228. Finally, clock 234 is coupled to processor unit 232. Clock 234 is further coupled to sign unit 228.

The receiver operates in the presence of both in-phase and quadrature components (complex data). The above-described receive chain 200 is shown for illustrative purposes only, and may form part of a transceiver circuit (not shown).

Referring to FIG. 3, each of the second and third base stations 108 and 107 has a reception chain 300. Receive chain 300 has antenna 302 coupled to low noise amplifier 304. Low noise amplifier 304 is coupled to bandpass filter 306. Bandpass filter 306 is coupled to mixer 308. Mixer 308 is coupled to low pass filter 312 and synthesizer unit 310. The low pass filter 312 is coupled to an analog-to-digital converter (ADC) 314 coupled to the buffer 316. The buffer unit is a delay estimation unit 320
Is combined with Within the delay estimation unit 320, the buffer output is
2

Multiplier 322 is coupled to integrator 324 and variable delay unit 326. Integrator unit 324 is further coupled to peak detector 330. The integrator 324, which is set to the initial value 0 at the beginning of each correction operation, that is, at the beginning of a specific received data block, integrates data received at a predetermined time Ti.
The output of peak detector 330 is coupled to processor 332. Variable delay unit 326 is coupled to multiplier 329 and further to processor 332. Clock 334 is coupled to processor 332. The multiplier 329 is the DSP unit 31
9 and the signing unit 328. The DSP unit is coupled to the information data unit 318. Clock 334 is further coupled to sign unit 328.

The receive chain operates in the presence of both in-phase and quadrature components (
Complex data). The above-described receive chain 300 is for illustration purposes only, and may form part of a transceiver circuit (not shown).

Each of the first, second, and third base stations 104, 108, 107 transmits a series of 20 ms data frames having a predetermined data frame structure 400 (shown in FIG. 4). Is possible. The data frame 400 includes information data portions 436, 438, 440, 442, 444, 446, 448, 450, 452,
454, 456, 458, 460, 462, 464, 466, 468. Frame structure 400 further includes 16 power control data portions 404,4.
06,408,410,412,414,410,418,420,422,4
24, 426, 428, 430, 432, 434.

Data frame 400 is scrambled and spread by scrambler code 500. The spreading is for increasing the signal bandwidth of the data frame 400. The scrambler is responsible for all network elements, ie base stations 104,1
08 and 107 and a plurality of codes 504 and 506 known to the mobile terminal 120.
, 508, 510.

Referring to FIG. 5, data is scrambled and spread by LC code 504 in multiplier 512. This data is further scrambled by Walsh code 506 in multiplier 514. The resulting scrambled data is then scrambled once in multiplier 516 with an I-code 510 for in-phase transmission and in multiplier 518 with a Q-code 508 for quadrature transmission.
Times scrambled. The resulting scrambled and spread code is referred to as a scrambling code 502 in this embodiment.

The scrambling code 502 is used for calculating various parameters such as, for example, channel estimation, frame synchronization, and coherent detection of data.
The operation of the mobile terminal 120 is synchronized with the scrambling code 502.

Mobile terminal 120 is capable of transmitting a series of 20 ms data frames having data structure 600. Most of the data frame 600 is an information data part.

Data frame 600 is scrambled and spread by scrambler 700. The spreading is for increasing the signal bandwidth of the data frame 600. The scrambler 700 includes a plurality of codes 704, 712, 706 known to all network elements, ie, the base stations 104 and 108 and the mobile terminal 120.
including.

Referring to FIG. 7, data is scrambled and spread by LC code 704 in multiplier 710. The resulting scrambled and spread data is further scrambled once in multiplier 712 for in-phase transmission by I code 708 and in multiplier 714 by Q code 706 for quadrature transmission.
Times scrambled. The resulting scrambled and spread code is referred to as a scrambling code 702 in this embodiment.

The operation of the above-described cellular system 100 will be described below. The call is established based on any method known in the art. A first base station capable of communicating with the mobile terminal 120 and the first traffic channel (tch) is allocated. A data frame having the structure of the first data frame structure 400 is transmitted from the first base station 104 and received by the mobile terminal 120. A data frame having the structure of the second data frame structure 600 is
And received by the first base station 104. The first base station 104 has power control data 404, 406, 408, 410, 412, 414, 416, 4
18, 420, 422, 424, 426, 428, 430, 432, 434, the mobile terminal 12 based on techniques well known in the art.
0 transmission power is controlled. The data frame 600 received by the first base station antenna 202 has only enough power to allow the first base station 104 to properly detect the propagation time delay and information data. The information data means unknown information data existing in the data frames 400 and 600.

Therefore, the transmission power of mobile terminal 120 is large enough to overcome the propagation loss to only first base station 104. Since excessive propagation loss occurs in the second and third base stations 108 and 107 that are not communicable in the mobile terminal 120, the second and third base stations 108 and 107 have high reliability in time delay and information data. The data frame 600 transmitted by the mobile terminal 120 cannot be received with sufficient power to detect it without any problem.

FIG. 8 shows a method for detecting the information data 828 and the time delay 829 in the first base station 104 and will be described below. Synthesizer 210 of first base station 104 is tuned to receive data frame 600 transmitted from mobile terminal 120 at the expected time of arrival (step 802). When the traffic data 600 is received by the first base station 104 in the designated time frame,
The traffic data is saved (step 806).

Here, first base station 104 determines whether sufficient time has elapsed to receive all data frames 600 (step 808). At this time, the first base station 10
The longest expected propagation time delay, based on the distance between 4 and mobile terminal 120, is considered. If not, the first base station 104 continues to receive and store traffic data (step 806). When the designated time has elapsed, the first base station 104 initializes the expected time delay (T) to 0 (step 810).

Next, a descrambling code, similar to scrambling code 702, is designated time delay (known in the art as a synchronized code) when data frame 600 is transmitted by mobile terminal 120. Is delayed by T (step 8
12). First base station 104 descrambles the received data traffic with the delayed descrambling code 704 (step 814). The descrambled data traffic is then summed (integrated) over a data symbol time Ts (step 818).

If no significant peak is detected by the first base station 104, the expected time delay T is increased (by a predetermined amount) (step 820), and steps 812 and 812 until a significant peak is detected. Repeat 814, 816, 818 and 820. After a significant peak has been detected, the first base station 104 calculates and stores the time delay, and
The distance from 20 is calculated (step 822).

When multipath propagation is present, multiple peaks may be detected, and one or more of them may be used for data detection. After the time delay between the first base station 104 and the mobile terminal 120 has been successfully estimated, the appropriate portion of the received traffic data is selected in the data frame portion 600 transmitted by the mobile terminal 120. (step 826), then the information data contained in the data frame 600 is detected and stored (step 4 28).

This time delay, and the distance between the first base station 104 and the mobile terminal 120 is MS
It is sent to C114 and stored. The method of detecting the time delay in the second base station 108 is shown in FIG. 9 and will be described below.

The synthesizer 310 of the second base station 108 is tuned to the expected arrival time of the data frame 600 to receive the data frame 600 transmitted from the mobile terminal 120 (step 902). Second base station 1 at a specified time
When the traffic data is received by 08, the traffic data is saved (step 906).

The second base station then determines whether sufficient time has elapsed to receive the entire data frame 600 (step 908), where the second base station 108 and the mobile terminal 120 The longest expected transit time delay caused by the distance between is taken into account. If not, the second base station continues to receive and store traffic data (step 906). At the point in time at which the specified time has elapsed, the second base station 108 may, in step 828, transmit the B
Information data 31 detected and stored via a network element such as SC 112
8 is obtained and stored (step 910).

Thereafter, the second base station 108 processes the stored information 318 and, prior to transmission of the data frame 600, processes it with scrambling codes 702, 328.
The initial information data is scrambled and stored in a manner similar to the processing and scrambling performed by the mobile terminal 120 (step 912). After step 912, the stored, processed and scrambled information data, now referred to as the "data descrambling code", is stored in the envelope and phase in the mobile terminal 1
20 is substantially similar to data frame 600 transmitted by

Next, second base station 108 initializes the expected time delay T to zero (step 916). Here, the "data descrambling code" is delayed by the specified delay T (step 918). The second base station 108 descrambles the received data traffic with a "data descrambling code" (step 920).
The descrambled data traffic is then summed (integrated) over a sufficiently long period of time Ti so that the data frame 600 transmitted from the mobile terminal 120 can be detected reliably and without any problem ( Step 922
). Ti is long enough to provide sufficient processing gain to account for any excess propagation loss at the second base station 108 when compared to the propagation loss at the first base station 104.

The second base station 108 then determines whether a significant peak is detected as a result of the summation (step 928). If no peak is detected by the second base station 108, the expected time delay T is increased (step 924) and steps 918, 920, 922, 926 and 924 are repeated until a significant peak is detected.

After an acceptable peak has been detected, the second base station 108 calculates a time delay,
Save and further calculate the distance of the mobile terminal 120 from the second base station 108 (step 928).

The third base station 107 uses the same time delay detection method as the above-described time delay detection method for the second base station 108. The time delay and the distance between the second base station 108 and the mobile terminal 120 may be different from the MSC
It is sent to 114 and stored. Time delay, third base station 107 and mobile terminal 1
20 is sent to MSC 114 and stored. The MSC 114 can be configured to use the first, second, and third methods in a manner known in the art as triangulation.
Estimate the coordinates of the mobile terminal 120 using the stored data relating to the distance of the mobile terminal from the other base stations 104, 108, 107, and the known coordinates of the first, second, and third base stations 104, 108, 107. I do.

The remaining elements of a cellular communication system are well known in the art and need not be described at length here. Above, the embodiments of the present invention have been described for the purpose of illustration, but as will be readily apparent to those skilled in the art, various alternatives and modifications based on the described configuration are within the scope of the invention. It is possible to manufacture.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating one general embodiment of the present invention.

FIG. 2 is a schematic diagram showing some elements of a first base station according to the embodiment of the present invention.

FIG. 3 is a schematic diagram showing some elements of a second base station according to the embodiment of the present invention.

FIG. 4 is a diagram showing the structure of a data frame normally transmitted by first and second base stations.

FIG. 5 is a schematic diagram showing elements of a scrambler for scrambling and spreading the data frame shown in FIG. 4;

FIG. 6 shows a data frame structure normally transmitted by a mobile terminal.

FIG. 7 is a schematic diagram showing elements of a scrambler for scrambling and spreading the data frame shown in FIG. 6;

FIG. 8 is a flowchart illustrating operation steps of a part of the first base station schematically illustrated in FIG. 2;

FIG. 9 is a flowchart illustrating operation steps of a part of the second base station schematically illustrated in FIG. 3;

[Procedural Amendment] Submission of translation of Article 34 Amendment of the Patent Cooperation Treaty

[Submission Date] January 13, 2000 (2000.1.13)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claim 12

[Correction method] Change

[Correction contents]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

Accordingly, in a first aspect of the present invention, a communication network comprising a mobile terminal, at least one first base station serving the mobile terminal, and at least one second base station ( Example: A method for detecting a signal at a cellular base station, wherein mobile transmission data detected at a first base station is used by a second base station to increase the probability of detection of transmission data by a second base station. A method is provided.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

[0015] Preferably, spatial filtering is used at the second base station to reduce the effect of the propagation channel on the received signal. According to a second aspect of the present invention, there is provided a system for detecting a signal in a communication network (e.g., cellular) including a plurality of base stations and mobile terminals, wherein at a particular time at least one of the base stations is provided. Is a serving base station, the mobile terminal is served by the serving base station, and the serving base station can receive and detect data transmitted to it by the mobile terminal, and A system is provided wherein the data can be used by a serving base station and / or at least one other base station to increase the probability of detecting transmitted data.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0027

[Correction method] Change

[Correction contents]

Referring to FIG. 5, data is scrambled and spread by LC code 504 in multiplier 512. This data is further scrambled by Walsh code 506 in multiplier 514. The resulting scrambled data is then scrambled once in multiplier 516 with an I-code 510 for in-phase transmission and in multiplier 518 with a Q-code 508 for quadrature transmission.
Times scrambled. The obtained code for performing scrambling and spreading is referred to as a scrambling code 502 in this embodiment.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

Data frame 600 is scrambled and spread by scrambler 700. The spreading is for increasing the signal bandwidth of the data frame 600. Scrambler 700 includes a number of codes 704, 708 , 706 known to all network elements, ie, base stations 104, 107 and 108, and mobile terminal 120.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction contents]

Referring to FIG. 7, data is scrambled and spread by LC code 704 in multiplier 710. The resulting scrambled and spread data is further scrambled once in multiplier 712 for in-phase transmission by I code 708 and in multiplier 714 by Q code 706 for quadrature transmission.
Times scrambled. The obtained code for performing scrambling and spreading is referred to as a scrambling code 702 in this embodiment.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0032

[Correction method] Change

[Correction contents]

The operation of the above-described cellular system 100 will be described below. The call is established based on any method known in the art. A first base station capable of communicating with the mobile terminal 120 and the first traffic channel (tch) is allocated. A data frame having the structure of the first data frame structure 400 is transmitted from the first base station 104 and received by the mobile terminal 120. A data frame having the structure of the second data frame structure 600 is
And received by the first base station 104. The first base station 104 has power control data 404, 406, 408, 410, 412, 414, 416, 4
By 18,420,422,424,426,428,430,432,434, controls the transmission power of the mobile terminal 120 based on techniques well known to have contact in the art. The data frame 600 received by the first base station antenna 202 has only enough power to allow the first base station 104 to properly detect the propagation time delay and information data. Information data is data frame 4
00 and unknown information data existing in the data frame 600.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction contents]

Therefore, the transmission power of mobile terminal 120 is large enough to overcome the propagation loss to only first base station 104. Since excessive propagation loss occurs in the second and third base stations 108 and 107 that cannot communicate with the mobile terminal 120 , the second and third base stations 108 and 107 transmit the time delay and information data with high reliability. In addition, the data frame 600 transmitted by the mobile terminal 120 cannot be received with sufficient power for detection without any problem.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction contents]

FIG. 8 shows a method for detecting the information data 828 and the time delay 824 in the first base station 104 and will be described below. Synthesizer 210 of first base station 104 is tuned to receive data frame 600 transmitted from mobile terminal 120 at the expected time of arrival (step 802). When the traffic data 600 is received by the first base station 104 in the designated time frame,
The traffic data is saved (step 806).

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

When multipath propagation is present, multiple peaks may be detected, and one or more of them may be used for data detection. After the time delay between the first base station 104 and the mobile terminal 120 has been successfully estimated, the appropriate portion of the received traffic data is selected in the data frame portion 600 transmitted by the mobile terminal 120. (step 826), then the information data contained in the data frame 600 is detected and stored (step 8 28).

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0043

[Correction method] Change

[Correction contents]

Next, second base station 108 initializes the expected time delay T to zero (step 916). Here, the "data descrambling code" is delayed by the specified delay T (step 918). The second base station 108 descrambles the received data traffic with a "data descrambling code" (step 920).
The descrambled data traffic is then summed (integrated) over a sufficiently long period of time Ti so that the data frame 600 transmitted from the mobile terminal 120 can be detected reliably and without any problem ( Step 922
). Ti, since sufficiently long in order to sufficiently reduce the noise bandwidth, known as the "processing gain" in the art partial field, sufficient signal - given noise ratio gain, by this, the first base station Any excess propagation loss at the second base station 108 when compared to the propagation loss at 104 is accounted for.

[Procedure amendment 13]

[Document name to be amended] Drawing

[Correction target item name] Fig. 7

[Correction method] Change

[Correction contents]

FIG. 7

[Procedure amendment 14]

[Document name to be amended] Drawing

[Correction target item name] Fig. 8

[Correction method] Change

[Correction contents]

FIG. 8

[Procedure amendment 15]

[Document name to be amended] Drawing

[Correction target item name] Fig. 9

[Correction method] Change

[Correction contents]

FIG. 9

[Procedure amendment]

[Submission date] July 28, 2000 (2000.7.28)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

──────────────────────────────────────────────────続 き Continuation of front page (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE ), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SZ, UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE , KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZWF terms (reference) 5K067 BB21 CC10 CC24 DD44 DD57 EE02 EE10 EE16 EE24 EE71 FF16 GG09 HH21 HH22 JJ34 JJ36 JJ39 JJ51

Claims (24)

[Claims] A method for detecting a signal in a communication network having a mobile terminal, at least one first base station serving the mobile terminal, and at least one second base station. , A method wherein mobile transmission data detected at a first base station is used by a second base station to increase detection of transmission data by the second base station. 2. The signal received by the first base station is of sufficient quality to enable detection of the data transmitted by the signal, and the detected data is And the mobile terminal's transmission is used by the second base station.
2. The method of claim 1, wherein data is not received with sufficient power for proper detection to enable detection of data by the base station. 3. The method according to claim 1, wherein the detecting step at the second base station includes detecting and calculating a reception time delay due to signal propagation due to a distance of the mobile terminal from the corresponding base station. Method. 4. The method according to claim 1, wherein the step of detecting at the second base station includes detecting the received signal power of the mobile terminal transmission signal by the second base station. 5. The receiver according to claim 1, wherein the communication network is a cellular direct-sequence code division multiple access (DS-CDMA) system and the data is used to allow a longer integration time at the base station. 5. The method according to claim 1, wherein the processing gain is extended and increased. 6. The position of the mobile terminal is determined by: (a) using a reception time delay at each base station; (b) using a direction of the mobile terminal from each base station;
c) any one of a combination of the reception time delay and / or the direction of the mobile terminal from the first base station and the reception time delay and / or the direction of the mobile terminal from the second base station; 6. The method according to any one of the preceding claims, determined by the network system by some or all. 7. The method according to claim 1, wherein at least data received by the first base station is capable of identifying the mobile terminal in the network system. 8. The method according to claim 1, wherein the measured signal power of the mobile terminal is used for preparing for a handoff from the first base station to the second base station. 9. The method according to claim 1, wherein the detecting at the second base station comprises detecting the presence of data detected at the first base station. 10. The method according to claim 1, wherein the data transmitted by the mobile terminal is unknown information data. 11. The method according to claim 1, wherein the data transmitted by the mobile terminal is a predefined sequence. 12. A system for detecting a signal in a communication network including a plurality of base stations and a mobile terminal, wherein at a particular time at least one of said base stations is a first serving base station. The mobile terminal is served by the first serving base station, wherein the first serving base station is capable of receiving and detecting data transmitted to it by the mobile terminal; Data that can be used by the first serving base station and / or at least one second base station to increase detection of transmitted data. 13. The signal received by the first base station is of sufficient quality to allow detection of the data transmitted by the signal, and at the second base station, the mobile terminal transmission 13. The system of claim 12, comprising means for utilizing the detected data not received at sufficient power for proper detection and enabling detection of the data by a second base station. 14. The second base station according to claim 12, wherein said second base station has means for detecting and calculating a reception time delay due to signal propagation due to a distance of the mobile terminal from a corresponding base station. System. 15. The system according to claim 12, wherein the second base station has means for detecting a received signal power of a mobile terminal transmission signal by the second base station. 16. The communication network is a cellular direct spreading code division multiple access (DS-CDMA) system that extends receiver processing gain by allowing longer integration times at base stations. 16. A system according to any one of claims 12 to 15, comprising means for utilizing the data for augmentation. (A) using a reception time delay at each base station; (b)
Using the direction of the mobile terminal from each base station, (c) the reception time delay and / or the direction of the mobile terminal and reception time delay from the first base station, and / or the second
Any one or several of the combinations of directions of the mobile terminal from the base station of
17. The system according to any one of claims 12 to 16, comprising means for determining the location of the mobile terminal from a network system, or by all. 18. The system according to claim 12, further comprising means for utilizing data received by at least the first base station for identifying a mobile terminal in the network system. . 19. The system as claimed in claim 12, further comprising means for using the measured signal power of the mobile terminal in preparation for a handoff from the first base station to the second base station. . 20. The system according to claim 12, wherein the second base station includes means for detecting the presence of data detected at the first base station. 21. The method according to claim 12, wherein the data transmitted by the mobile terminal is unknown information data. 22. The method according to claim 12, wherein the data transmitted by the mobile terminal is a predefined sequence. 23. A method for detecting a signal according to any one of the embodiments described herein or illustrated in the accompanying drawings. 24. A system for signal detection as in any one of the embodiments described herein or shown in the accompanying drawings.