Method of paging wireless terminal in wireless telecommunication system

FIELD: information technology.

SUBSTANCE: short paging message is generated for transmission over a first channel and a full paging message is generated for transmission over a second channel. The short paging message contains less data than the full paging message, and is transmitted for a group of wireless terminals over a short paging time interval. The short paging message indicates that a request has been received for transmitting the short paging message, and that receiving terminals must process a second channel over which a more detailed full paging message will be transmitted over the next time interval. The terminal controls the full paging channel after reception of the short paging message in the short paging channel.

EFFECT: low power consumption in standby mode.

11 cl, 6 dwg

 

The technical field

The present invention relates to a method and apparatus for searching a call to a wireless terminal in a wireless telecommunications system. More specifically, the present invention relates to a new improved method and apparatus for searching a call to a cellular telephone or other wireless communication devices. Search call can be made using the channel quick search call channel full search of the call.

Prior art

Standard cell phone IS-95 (and its derivatives, such as IS-95A and ANSI J-STD-008, referred to in the present description is given using the generalized notation IS-95) uses the prospective method of signal processing to provide an efficient and high-quality mobile communication services. For example, a cellular telephone system, corresponding to the standard IS-95 uses valderoure, error detection, direct error correction, interleaving and modulation with the expansion of spectrum for more efficient use of the available frequency band and provide a more reliable connection. In General, the benefits of the standard IS-95, include a longer talk time, higher throughput, lower the number of missed calls compared with other types of cellular communication systems.

To communicate in a proper way the standard IS-95 provides a set of channels with a high degree of coding, in which data is transmitted with different functions. These channels with a high degree of coding include channel search call or paging channel on which messages are sent search call or paging message informing a cellular telephone or other wireless terminal, the incoming connection request. In accordance with the standard IS-95 paging messages are transmitted at speeds from low to medium (4800 or 9600 bit/s) during the selected time slots that are pre-assigned groups of cell phones. Table 1 presents data in a generic paging message, as a typical example of paging messages generated essentially in accordance with the standard IS-95A.

td align="justify"> CLASS_0_DONE
Table 1
The message fieldLength (bits)
MSG_TYPE (the message Type)8
CONFIG_MSG_SEQ6
ACC_MSG_SEQ6
1
CLASS_1_DONE1
RESERVED (reserved)2
BROADCAST_DONE1
RESERVED (reserved)4
ADD_LENGTH3
ADD_PFIELD8 x ADD_LENGTH

And zero or more event records subsequent search calls:

PAGE_CLASS2
PAGE_SUBCLASS2
Fields of specific classes of search callIn a typical case, 2-12 bytes

The table illustrates the length of a typical pager message, and a detailed description of the function of each field is not included in the table. This detailed description can be retrieved by referring to the well-known public standard IS-95 (in particular, the standard IS-95A). Paging message is also the start field of the message (MSG_LEN) eight-bit length, which indicates the length of the message, and ends with a 30-bit p is LEM control using a cyclic redundancy code (not shown).

For availability control paging messages cell phone periodically monitors the paging channel during the selected time interval. In particular, cell phone periodically activates the processing circuit integrated RF and digital signal in accordance with how it is necessary for the successful processing paging messages. Since a typical paging message is relatively long and is piped to the high degree of coding with speeds from low to medium, the corresponding processing within each time interval of the search call requires a significant amount of time and resources of the signal processing and therefore requires considerable power to effect the processing. This reduces the amount of time during which the cell phone can remain in standby mode when using battery power a given capacity, which is highly undesirable.

The invention

In accordance with the invention, the search method call to a wireless terminal in a wireless telecommunications system includes a message quick search dial channel with less coding and creation of messages full of the search call on channel a higher degree is the new encoding.

Also in accordance with the invention, the search method call to the wireless terminal from a variety of wireless terminals includes (a) sending the message brief search of the call addressed to a subset of the above set of wireless terminals, including wireless terminal; and b) forming the full message search call identifying mentioned wireless terminal.

In addition, in accordance with the invention, the search method call to the wireless terminal from a variety of wireless terminals includes a) forming messages brief search of the call and (b) the formation of the full message retrieval call, and referred the report to a brief search of the call contains significantly less data than the full-search message call.

Also in accordance with the invention, a method of receiving a message retrieval call includes the steps of (a) control channel quick search call for a message from a brief search of the call and (b) control channel full search of the call, if you receive the message brief search of the call.

Corresponding to the invention a device for searching a call to a wireless terminal in a wireless telecommunications system includes a means for transmitting messages brief search call the channel with less coding and means for forming a message full search of the call by means of a higher degree of encoding.

The present invention is embodied in a new improved method and system for searching a call to a cellular telephone or other wireless terminal, which can reduce the power consumption in standby mode. Can be used two channel search call. Set the channel quick search call with minimal coding, according to which messages are sent a brief search call for one from a set of time intervals a brief search of the call. Message quick search of the call indicates that the request to establish a communication adopted and that the receiving communication terminal to handle the channel full search call with a high degree of encoding transmitted in the next time interval full search call for more detailed messages full search of the call. The communication terminal control channel full search of the call after the message brief search of the call is accepted by the channel quick search of the call.

Search calling communication terminal and a base station controller (ASC) first generates the message brief search of the call within a time interval, a brief search of the call assigned to the group of communication terminals, which includes the specific communication terminal, the notified channel search call. This is followed by a message full search call that identifies a particular search terminal. The communication terminal periodically monitors the time interval a brief search of the call and, after discovering in it a brief search of the call, activates the circuit for decoding processing channel full search of the call. After processing channel full search of the calling communication terminal determines addressed whether it is the full message retrieval call, and if not, it disables decoding scheme and returns to the processing channel quick search of the call.

In one embodiment of the invention, the search method call to the wireless terminal from a variety of wireless terminals includes a message generating quick search of the call to indicate the transfer request message full search of the call; a message generating full search of the call, and a brief message retrieval call contains less data than the full message search call; a message full search of the call from the base station to the wireless terminal via a second channel; sending the message brief search of the call from the base station for the group of wireless terminals, in which is included the aforementioned wireless terminal (10), through the first channel, the second channel requires more processing than the first channel, and this processing includes encoding, interleaving and adding cyclic redundancy check to the full message retrieval call. Message quick search of the call is sent to a group of wireless terminals within a time interval, a brief search of the call in the first channel, and the full message retrieval call is transmitted in a time interval of a complete search of the call in the second channel; used mobile MOBILE identification ID of the wireless terminal to a hash function to calculate a time interval, a brief search of the call or the time interval full search of the call, and the transmission time interval full search call is made within the time delay from transmission time interval, a brief search of the call.

The appropriate device for the search call to the wireless terminal from a variety of wireless terminals includes means for forming a message, a brief search of the call to indicate the transfer request message full search of the call; means for forming a message full search call that contains more data than the message brief search will cause the a; means for transmitting messages full search of the call from the base station to the wireless terminal via a second channel; means for transmitting messages brief search of the call from the base station for the group of wireless terminals, which includes the aforementioned wireless terminal, via the first channel, the second channel requires more processing than the first channel, and said processing includes encoding by the encoder, interleaving by the interleaver and adding cyclic redundancy check code through a scheme of the cyclic redundancy check code to the message full search of the call, and means for applying mobile ID MOBILE ID of the wireless terminal to a hash function for calculate the time interval a brief search of the call or the time interval full search of the call.

Brief description of drawings

The features, objectives and advantages of the invention are explained in the detailed description of the variants of its implementation, illustrated by drawings, which presents the following:

figure 1 - block diagram of a cellular telephone communications system;

figure 2 - timing diagram illustrating the temporal characteristics of the selected time intervals in the channel quick search of the call and the channel full POI is the same call;

figure 3 is a block diagram illustrating the sequence of steps performed in the process of search engine call wireless interval;

4 is a block diagram illustrating the encoding is performed in the channel full search call and short channel search call;

5 is a block diagram illustrating the sequence of steps performed by the wireless terminal during the standby mode, and

6 is a block diagram of a receiver constructed in accordance with one embodiments of the invention.

Description of the preferred embodiments of the invention

Below is described a method and system for searching a call to a cellular telephone or other wireless search terminal, providing reduced power consumption in standby mode. Can be used two channel search call. In the following description, considered the option of carrying out the invention is described in the context of cellular telephone communications system, working essentially in accordance with the standard IS-95. Although the invention is particularly suitable for use in this environment, however, and many other digital communication systems can benefit from the use of the present invention, including wireless communication systems, multiple access with time division multiplexing (mdvr), satellite is a communication system and a wired system, which is used to transfer encoded data alarm.

Figure 1 presents the block diagram is very simplified cellular telephone system, which can be used in the present invention. The wireless terminal 10 (in a typical case of cell phones) are located around the base station 12. Wireless terminals 10A and 10b are in active mode and therefore interact with one or more base stations 12 using radio frequency (RF) signals modulated in accordance with the method of signal processing mode multiple access, code-division multiplexing (mdcr) standard IS-95. System and method for processing RF signals, essentially consistent with the standard, IS-95, is described in U.S. patent No. 5103459 "System and method for generating signals in a cellular telephone system mode mdcr", assigned to the assignee of the present invention (hereinafter referred to patent, the '495). Other wireless terminals 10 are in standby mode and therefore control messages search call, pointing to the handshake request.

In a preferred embodiment of the invention, each base station generates the signals straight line corresponding to the channel group direct line of communication. The channels are defined by a set and the orthogonal 64-element codes Walsh, each of which is used to modulate the data associated with a particular channel. The channels are defined by function and include a pilot channel signal, which is transmitted with periodic repetition of the sequence of phase shifts, the sync channel, through which data are transmitted synchronization, including the absolute system time and phase shift of the corresponding channel pilot signal and the traffic channels on which the data is sent to the terminal. The traffic channels are typically designed to transmit data to a specific wireless terminal 10 during the interval of interaction with a particular base station.

In addition, in accordance with one embodiments of the invention one or more of the Walsh channels identified as channels a brief search of the call, and one or more channels of the Walsh - like channels full search of the call. The purpose and operation of channels a full search of the call is preferably performed in accordance with the channel search call (paging channel), defined according to the standard IS-95. Some of the methods and device for search and call, essentially in accordance with the standard IS-95 is described in U.S. patent No. 5392287 (hereinafter patent '287) "apparatus and method for reducing the power consumption in the mobile receiver is th communication system" and No. 5509015 (hereinafter patent '015) on a "Method and apparatus for scheduling communication between transceivers", assigned to the assignee of the present invention.

As described in the patents '287 and '015 and defined in the standard IS-95 channel full search call is divided in time in the selected time slots ("slots"). These time intervals, in turn, are assigned to groups of wireless terminals, and this timing is based on the global identification of the mobile subscriber (MIME), identification data which is unique to each wireless terminal 10, or based on other identification information for the terminal, for example, a Mobile identification number (MIN). In other embodiments of the invention may be used and other identification information, including an electronic serial number (CPPS) of the wireless terminal or a temporary identity of the mobile subscriber (WIM). Can use other values. Various possible types of identification information that can be used, will be further referred to the generalized concept of "cell identifier (cell ID). Channels a brief search of the call is also divided into time intervals.

Figure 2 presents a diagram illustrating the timing channel full search call and short channel search call configure avannah in accordance with a possible embodiment of the invention. Channel quick search call is divided into time intervals of 30 brief search of the call, and the channel full search call is divided into time intervals 32 full search of the call, which preferably have a greater duration than the duration of the time slots of the channel quick search call. Sets or groups of time intervals of 30 is assigned to a single time intervals 32 full search of the call, as shown by the diagonal arrows, although the ratio of one-to-one relationship between time intervals a full search of the call and time intervals a brief search of the call or other relationship between them is also compatible with the use of the invention. Assigning time slots 30 a brief search of the call to a specific set of wireless terminals is preferably performed by applying a hashing function to the mobile ID of the wireless terminal 10.

Search call to a specific wireless terminal 10 within the allocated time interval, a brief search of the call message is sent to a brief search of the call, and within the allocated time interval full search of the call message is sent to a full search of the call. The time interval a brief search of the call and the time interval complete poiskovogo call occur with periodic repetition, that provides the appearance of a time interval associated with the particular terminal, after some limited period of time. As shown in figure 2, the time intervals 32 full search call appears with a delay of 34 after the associated time intervals of 30 brief search of the call, to allow the wireless terminal to process the message brief search of the call and activate additional decoding scheme before the next time interval full search of the call.

Figure 3 presents the block diagram of the sequence of operations performed by a base station controller (ASC) 14 during the search procedure call. The search procedure call begins at step 36 and 38 is determined accepts the request to establish a connection. If not accepted, then step 38 is performed again.

If a request for communication is received, the time interval a brief search of the call and the time interval full search of the call associated with the wireless terminal which sent the request for communication, are calculated at step 40 on the basis of the cell ID or other identifying information for the wireless terminal 10. In one of the embodiments of the invention the time interval quick search call bicicletas by using the first hash functions, and the time interval full search of the call is calculated using the second hashing function and the second hash function different from the first hashing function. In addition, time intervals a full search of the call have a duration of 80 MS, and the time intervals a brief search of the call have a duration of about 5 MS. Wireless terminal 10 can handle the entire channel or part of a channel full search of the call, depending on the content of the received message retrieval-call in accordance with the standard IS-95. ASC 14 preferably performs the necessary processing using one or more processors executing the program stored in the memory (not shown).

In a possible embodiment of the invention the time interval full search of the call is determined in accordance with the above patents '287 and '015 and the time interval a brief search of the call is determined by using a different hash functions to the mobile ID, although other means of distribution of time intervals of the search call is also compatible for use with the present invention. In particular, the time interval of a complete search of the call corresponds to the system time t, defined in frames of 20 MS, and rightly follow the it equation:

(floor(t/4)-PGSLOT)mod(16*T)=0 (1)

where T is the cycle duration of time intervals in units of 1.28 seconds, defined by T = 2iwhere i is the index of cycle time intervals (ICVI). PGSLOT is determined using the following hash functions:

PGSLOT=floor(N x((40505x(L⊕H⊕DECORR))mod 2∧16)/2∧16) (2)

where L is the 16 least significant bits of the 32-bit HASH_KEY, and N - 16 most significant bits HASH_KEY and N is equal to 2048. HASH_KEY - preferably mobile ID or some derivative, such as MIME. Function floor(x) determines the largest integer value less than or equal to X. for Example, the functions floor(2,99), floor(2,01) and floor(2,00) is 2, and the result of the function floor(-2,5) is-3. The value of decorrelation DRR is calculated as follows:

DRR=6 X HASH_KEY[0..11] (3)

where [0..11] there are 11 least significant bits of the 32-bit value, HASH_KEY.

The hashing function used to define the time interval a brief search of the call, in the preferred embodiment of the invention is calculated similarly to the time interval of a complete search of the call, except that the time interval a brief search of the call occurs ahead in the interval from 40 to 120 MS relative to the time interval full search of the call, and a set of wireless terminals assigned for a given time interval a quick search for the new call, varies in time, ensuring that each wireless terminal 10 is associated with a different set of other wireless terminals 10 for each time interval a brief search of the call. The variation of the set of terminals 10, with which each wireless terminal communicates during each time interval of the search call, helps to ensure that less active wireless terminals will not be permanently associated with a more active wireless terminal 10, and therefore they don't have unsuccessfully to monitor a large number of messages full search of the call, which is not directed to them.

In a possible embodiment of the invention the time interval a brief search of the call to the wireless terminal 10 appears on the interval a brief search of the call, duration 80 MS, which starts at 120 MS prior to the beginning of the time interval full search of the call, as calculated in accordance with the following equation:

(floor((t-6)/4)-PGSLOT)mod(16*T)=0 (4)

where PGSLOT is the same that was used for the time interval full search of the call. The duration of a brief search of the call is preferably set to 80 MS. Period a brief search of the call is divided into time intervals a brief search of the call, during which per the given message quick search call as described in more detail below. Preferably the time intervals a brief search of the call and associated messages brief search call duration of 1 bit. Therefore, the number of time intervals a brief search call per period a brief search of the call, is a function of the data rate of the channel quick search of the call.

As you can see, equation (4) coincides with equation (1), except that the system time offset of 6 frames, resulting in the beginning of the period a brief search of the call is at the moment beyond 120 MS time interval full search of the call. Ensuring offset by 120 MS ensures that there is at least 40 MS time (provided that the period of a brief search of the call is equal to 80 MS) between any particular time interval a brief search of the call and the time range full search call that provides for the wireless terminal sufficient time to prepare for processing messages full search of the call after receiving the message, a brief search of the call.

During a brief search of the call, duration 80 MS time interval a brief search of the call (with duration of 1 bit)assigned to a particular wireless interval 10, is determined to use what Lovanium the following equation:

QUICK_PGSLOT=1+floor ((Nx(40505x(L⊕H⊕DECORR))mod2∧16)/2∧16) (5)

where the value of N is set to the data rate of the channel short call (QPAGE_RATE) in the number of bits per time interval with a duration of 80 MS. For example, if the data rate of the channel quick call to 9600 bps, the value QPAGE_RATE is 768 bits/frame. In addition, the value of decorrelation is as follows:

DRR=(floor((t-6)/64)mod2∧16 (6)

Thus, equation (5) gives a value of from 1 to 768 respectively time interval a brief search of the call or the location of the bits within a short period of search call duration 80 MS, which starts at 120 MS prior to the beginning of the corresponding full-search call. Wireless terminal control channel quick search call within this time interval, a brief search of the call, and if the message is brief search of the call is accepted, then the wireless terminal will then monitor channel full search call for discovery messages full search of the call.

As can be seen from equation (6), the value of decorrelation DECORR for channel a brief search of the call is calculated as a function of system time, and therefore the resulting value QUICK_PGSLOT for a given set of wireless terminals 10 will vary over time. In gruppenbesteuerung terminal 10, associated with a specific time interval a brief search of the call, will have dierent time intervals a brief search calling over time (although they may continue to be informed about the call for the same period a brief search of the call)that allows you to ensure that less active wireless terminal 10 does not bind to more active wireless terminal 10, which resulted in the need to control channel full search call with unnecessary frequency and, consequently, excessive energy consumption.

If the cell ID is not contained directly in the request for communication, the data can be obtained by accessing the database using any other identifying information contained in the request, such as a phone number or mobile identification number of the wireless terminal 10.

After a time interval a brief search of the call and the time interval full search call defined 14 ASC sends the message brief search of the call at step 42 on the channel quick search of the call and the message full search of the call at step 44 channel full search of the call through one or more base stations 12. The base station 12 encode and modulate the channels on the risk of the call, as described in more detail below, and send two messages search call is made within the appropriate time frame brief search of the call and the time interval full search of the call.

After sending the message, a brief search of the call and message full search call ASC 14 produces at step 46 the survey to obtain a response indicating that the search call is answered. If the answer is accepted, then at step 50 starts the communication.

If response not accepted after the period of timeout, then at step 52 is transmitted to the second communication brief search of the call. At step 56 KBS 14 produces a survey to obtain feedback from the wireless terminal 10 determines at step 58, received any response. If the answer is accepted, then at step 50 starts the communication. If at step 58 it is determined that no response is made, then at step 60 the decision that the search call failed. In another embodiment of the invention two or more messages brief search of the call, and two or more corresponding messages full search call is generated for each search call. The second message brief search of the call and the message full search call to increase the probability of receiving a search call without introducing a delay that is necessary to determine the reception of the confirmation message from the wireless terminal 10.

In a preferred embodiment of the invention the message brief search of the call contains a bit INCOMING_PAGE (vhodyaschaya). Bit INCOMING_PAGE in the first state (e.g., logic 1) indicates that the handshake request is accepted for one of the wireless terminals 10 that are associated with the time a brief search of the call, and therefore these wireless terminals should handle channel full search call within the next designated time interval full search of the call. Bit INCOMING_PAGE in the second state (e.g., logic 0) indicates that the handshake request is not accepted for these wireless terminals 10, and therefore the channel full search of the call should not be processed during the next assigned time interval full search of the call. Therefore, a brief message retrieval call is coded in a higher degree than the full message retrieval call, because the search call is represented by one bit, and not significantly large number of bits, and therefore can be handled with fewer resources. Such encoding of the message should not be confused with channel coding, described below, where a higher level of encoding requires more processing resources, and therefore is less desirable from the standpoint of power consumption.

In a preferred embodiment of the invention, the message full search of the call contains the information defined in the standard IS-95 for normal message retrieval call, which allows the wireless terminal 10 to determine if he sent this search call. Sample search call generated in accordance with the standard IS-95A, is illustrated using the table above. As follows from the table, the full message search call contains significantly more information than the brief message retrieval call, which preferably contains one bit. So the message brief search of the call can be handled more easily by using the wireless terminal 10 and with less power consumption than the full message retrieval call.

In alternative embodiments of the invention are used multibyte messages brief call. These multibyte messages short call is used to encode and forward additional information beyond simple indication that the wireless terminal 10 must control channel full search key for the next assigned time interval 32 full search of the call. For example, multibyte message short call can be used to ukazaniya specifically, what wireless terminal 10 directed search call from a subset of wireless terminals, which are assigned to the corresponding time interval of 30 brief search of the call. Multibyte message quick call can also be used to indicate that the channel is full search of call should be monitored over a long time to change system settings can be transmitted to all wireless terminals 10. For specialists in the art should be obvious different useful types of information that can be transmitted using multinetwork messages brief call. In another alternative embodiment of the invention in brief message retrieval call is used abbreviated direct encoding with error correction.

In addition to transfer a smaller amount of information in the message brief search of the call as compared with the full-search message call, the preferred embodiment of the invention provides for a scheme of minimum coding for channel quick search challenge in comparison with channel full search of the call. Figure 4 presents an illustration of the encoding schemes used for channel full search of the call channel and a quick search of the call in accordance with one of the variations is tov embodiment of the invention.

As shown in figure 4, the data transmitted through a channel full search of the call, are subjected to convolutional coding using a convolutional encoder 60, and the received code symbols are repeated using repeater characters 61 to generate characters with a predefined speed. Repeated code symbols are then subjected to a block interleaving using a block interleaver 62. The data from the block interleaver scribblenauts using logic "exclusive OR" using thinned long code generated by the generator 64 long code with thinner 66. Long code is a binary code generated by pre-defined in function of a random number, initiating a random number generator, and known to all wireless terminals 10. Scrambled data modulated channel Walsh code that is intended for use by channel full search of the call, and the data modulated channel Walsh code, stretched along the spectrum by quadrature phase modulation (CPM) using a pseudo-random noise code, combined with data from other channels, converted with increasing frequency for transmission, preferably in accordance with the standard IS-95 (an extension of the spectrum, summing and stand the destructive transformation not shown).

According to figure 4, the data transmitted through the channel quick search of call, subject to encoding using channel Walsh code used to channel a brief search of the call, and then expand the spectrum are summed up and converted with increasing frequency, as described above. Preferably a single bit of data is transmitted over the channel quick search call, modulated by repeatedly using the same Walsh code for the effective transmission bit many times. You can also transfer data bits periodically using repeater characters, similar to the repeater 61 characters used for channel full search of the call. In another embodiment of the invention, the short channel search call can scribblenauts using long code as it is executed for a channel full search of the call.

As can be seen from figure 4, the processing associated with the transmission of information over the channel quick search of the call, is substantially less in duration, and complexity than the processing associated with the channel full search of the call. Therefore, the amount of processing required to perform the processing when receiving a channel quick search of the call, is also substantially smaller and therefore requires less energy than is required for Kahn is La full search of the call. Although reduced the amount of processing for the channel quick search of the call increases the likelihood of errors during the processing of any particular bit can be used other methods to reduce the impact of this increase in error rate, without significantly increasing the complexity of processing. Such methods include sending the same bits repeatedly, or interpretation of the transmission of low quality as a positive message retrieval call, as described below.

Figure 5 shows the block diagram of the algorithm of processing performed by the wireless terminal 10 in the standby mode in accordance with one embodiments of the invention. The treatment preferably is performed using a controller microprocessor with software stored in the memory associated with other integrated circuits and systems, which is well known in the prior art (not shown). Processing begins at step 80, and at step 84 determines whether there has come the assigned time interval a brief search of the call, and if not, then step 82 is executed again.

If you set the time interval a brief search of the call is reached, the wireless terminal 10 at step 86 processes the channel quick search call. Preferably the processing vypolnjaete is much smaller subgroup schemes of signal processing, contained in the wireless terminal than is used for message processing channel full search of the call. In accordance with the transmission processing performed for the channel quick search call, shown in figure 4, the receive processing preferably includes a down conversion adopted by the RF energy, the compression using a pseudo-random code spread spectrum and demodulation using the assigned Walsh code. The resulting data is "soft" solutions directly processed to determine the transmitted logical level.

According to figure 5 at step 88 determines whether the message received brief search of the call at step 86, based on the logic level of the detected data. If the message is brief search call was detected, then processing continues at step 90, as described below. If the message is brief search of the call is not detected, then an additional step 89 is defined acceptable quality signal processing channel quick search call. If so, the wireless terminal 10 returns to step 82. If the signal quality is not acceptable, then processing continues at step 90, as described below.

The quality of the received signal can be determined using various well known is the shaft of the methods including determining, when the received power of the signal transmitted by the transmitter 50, will decrease below the threshold value, or determining when the signal-to-noise ratio of the pilot channel signal decreases below a predefined threshold. By controlling the availability of the full message search call when the quality of the received signal is not acceptable, the number of missed messages full search of the call, due not detected due to unacceptable signal quality message brief search of the call, is minimized.

If the message is brief search call was detected or the quality of the received signal was unacceptable, the wireless terminal 10 at step 90 activates additional schemes decoding and phase 92 processes the channel full search of the call within a designated timeframe full search call using the activated schema. Time interval a brief search of the call and the time range full search of the call assigned to a particular terminal, should be sufficient to ensure the activation of additional circuits decode the wireless terminal 10 after the discovery messages brief search of the call before the beginning of the time interval full search of the call.

On the floor is PE 94 wireless terminal 10 determines sent him a message full search of the call is processed at step 92, based on the address contained in the message, and if not, then at step 82 the decoding scheme in the wireless terminal 10 is turned off, and the step 84 is executed again. If the message full search of the call was sent to the wireless terminal 10, at step 96, the wireless terminal starts the processing of the relevant transfer, and wireless terminal at step 98 goes into active mode.

Figure 7 presents a block diagram illustrating in simplified form the wireless terminal 10, made in accordance with a possible embodiment of the invention. Digital demodulator 302, a block interleaver 304, lattice decoder 306 and the control system 308 is connected through a digital bus, and the RF receiver 300 is associated with a digital demodulator 302.

During standby mode, the control system periodically activates the RF receiver 300 and a digital demodulator 302 for processing channel pilot signal and the channel quick search call. The RF receiver 300 performs conversion with decreasing frequency and the digitization of RF signals, and a digital demodulator 302 performs digital demodulation during the first duration, generating data "soft" solutions for the processing channels. The control system 308 analyzes the data "is alcoho solutions for channel pilot signal, to determine the quality of the signal, and analyzes the data of "soft" solutions for channel a brief search of the call to determine is the message brief search of the call.

If the message is brief search of the call is accepted or if the signal is accepted with poor quality, then the control system 308 activates the block departmental (converted interleaver) 304 and lattice decoder 306 and configured digital demodulator to start processing channel full search key for a second duration greater than the first duration. The control system 308 monitors the data received through channel full search of the call, the message full search of the call directed to it, and if it is not found, disables block departmental 304 and lattice decoder 306 and continues to remain in the standby mode. If the full message retrieval call is detected, the control system 308 translates the wireless terminal in an active mode during which the relevant link.

In another embodiment of the invention the channel quick search of the call and the channel full search call United in one and the same channel. This means that the channel quick search of the call and the channel full search call modulated by the same Walsh code is. In the same code channel quick search of the call and the channel full search call logically different pre-defined schema temporary separation. For example, during certain time intervals of 80 MS is transmitted messages brief search of the call, while during the other time intervals of 80 MS is transmitted messages full search of the call in accordance with a predefined scheme for the distribution of time intervals. Such an implementation option simplifies handling during transmission and during reception due to the fact that requires the modulation and demodulation of only one code channel, however, requires a more substantial modification of the existing standard IS-95 and is therefore less compatible with existing wireless communication systems, the relevant standard IS-95.

As follows from the above description, due to the search call using messages brief search of the call with the minimum number of bits transmitted over the channel with minimal coding, the present invention enables the wireless terminal to consume less power when the availability control message retrieval-call in the standby mode. The lower power consumption in the standby mode allows AET wireless terminal to operate over a long time using this battery power and therefore increases the standby time for such a wireless terminal. Since wireless terminals typically used in mobile communication, often require long periods of time without recharging or replacing the batteries of the wireless terminal. Thus, to improve usability and reduce the probability of missing messages because of battery discharge, the increase in the length of time standby for a given battery capacity is highly desirable.

In addition, because the messages brief search of the call is transferred within a very short period of time, the control message brief search of the call, in addition to the emergency mode may be performed during an active mode, when you are processing a telephone call or other type of communication. Such control can be performed by briefly suspending processing channel traffic to be processed channel quick search of the call within a time interval, a brief search of the call. Because the time interval is brief search of the call has a duration of about 5 MS, then the lost data in a typical case will not be missed and can be restored using coding with direct error correction. After the channel quick search of the call is answered, a message full of POSCO is on call can be accepted by an additional suspension of processing channel traffic by transmitting a message signalling to the base station controller with the subsequent processing channel full search of the call. Thus, the possibility of receiving a message retrieval call during an active mode increases due to the use of the dual scheme of prospecting calls, as described above.

Thus, the described method and system that uses two channels for the implementation of search calls cell phones and other wireless terminals to reduce the power consumption in standby mode. The description of the preferred embodiments is intended to allow professionals in the art to make and use the invention. Various modifications of these embodiments are obvious to specialists, and the basic principles of the invention can be used in other types of exercise without the use of additional inventions. Thus, the present invention is not limited to the disclosed variants of its implementation, and has the widest scope consistent with principles and new features, disclosed in the present description.

1. The search method call to the wireless terminal (10) from multiple wireless terminals, containing
a) forming messages brief search of the call to indicate the transfer request message full search of the call;
b) forming a message full search will cause the and, the message brief search of the call contains less data than the full message search call;
c) transmission (44) messages full search of the call from the base station (12) to the wireless terminal (10) through the second channel;
d) transmission (42) messages quick search of the call from the base station (12) to the wireless terminal (10) for a group of wireless terminals in the set of wireless terminals, and referred to the wireless terminal (10) included in the above group of wireless terminals via the first channel, while the aforementioned second channel requires more processing than said first channel, these large processing includes encoding by the encoder (60), interleaving by the interleaver (62) and adding cyclic redundancy check code through a scheme of the cyclic redundancy check code to said full message search call, and a brief message retrieval call is sent to the mentioned group of wireless terminals within a time interval, a brief search of the call in said first channel, and the full message retrieval call is transmitted in a time interval of a complete search of the call in said second channel; and
(e) the use of mobile ID MOBILE ID in manutoo wireless terminal (10) to the hash function to calculate one of the mentioned time interval, a brief search of the call and the time interval full search call moreover, the transmission time interval full search call is made within the time delay from transmission time interval, a brief search of the call.

2. The method according to claim 1, further comprising stages
message encoding full-search call;
direct expansion sequence mentioned messages full search of the call, and
direct expansion sequence mentioned messages brief search of the call.

3. The method according to claim 1, further comprising stages
add information error detection for the message full search of the call;
direct expansion sequence mentioned messages full search of the call, and
direct expansion sequence mentioned messages brief search of the call.

4. The method according to claim 1, further comprising stages interleave messages full search of the call;
direct expansion sequence mentioned messages full search of the call, and
direct expansion sequence mentioned messages brief search of the call.

5. The method according to claim 1, in which step (e) is performed by applying a hash function to the system time and said mobile identity MOBILE ID.

6. The method according to claim 1, additionally containing the steps of receiving a message KRA is who search call;
activation of signal processing and
processing mentioned second channel using the above-mentioned signal processing.

7. The method according to claim 6, in which said processing circuit of the signal formed by the system (306) decoding trellis code.

8. The method according to claim 6, in which said processing circuitry signal formed facing the interleaver (304).

9. The method according to claim 6, in which said circuit signal processing circuit formed of the cyclic redundancy check code.

10. The method according to claim 1, wherein said encoder (60) is a convolutional encoder.

11. A device for searching a call to the wireless terminal (10) from multiple wireless terminals, containing
a) means for forming a message, a brief search of the call to indicate the transfer request message full search of the call;
(b) means for forming a message full search of the call, and a brief message retrieval call contains less data than the full message search call;
c) means for transmitting (44) messages full search of the call from the base station (12) to the wireless terminal (10) through the second channel;
d) means for transmitting (42) messages quick search of the call from the base station (12) to the wireless terminal (10) for a group of wireless term is found in many wireless terminals, and referred to the wireless terminal (10) included in the above group of wireless terminals via the first channel, while the aforementioned second channel requires more processing than said first channel, these large processing includes encoding by the encoder (60), interleaving by the interleaver (62) and adding cyclic redundancy check code through a scheme of the cyclic redundancy check code to the mentioned message the full search of the call, and a brief message retrieval call is sent to the mentioned group of wireless terminals within a time interval, a brief search of the call in said first channel, and the full message retrieval call is transferred in a time interval of a complete search of the call in said second channel; and
(e) means for applying mobile ID MOBILE ID mentioned wireless terminal (10) to the hash function to calculate one of the mentioned time interval, a brief search of the call and the time interval full search of the call, and the transmission time interval full search call is made within the time delay from transmission time interval, a brief search of the call.



 

Same patents:

FIELD: information technology.

SUBSTANCE: first channel with low degree of encoding is set up, over which a short paging message is sent during one of a set of paging time intervals. The short paging message indicates that receiving wireless communication devices must process a second channel with a higher degree of encoding, over which more detailed full paging messages are sent during the next time interval. The wireless communication device controls the full paging channel after reception of the short paging message in the short paging channel.

EFFECT: low power consumption in standby mode.

13 cl, 6 dwg

FIELD: information technologies.

SUBSTANCE: in a wireless communication device comprising an active radiating element and one or more passive elements, generating a directivity pattern in space, the active radiating element is an integrated radio modem, with its inbuilt transceiver and a transceiving antenna. Besides, the radio modem is placed in the device so that the device elements that surround it form the directivity pattern required for arrival of the maximum signal to the inbuilt transceiving antenna of the radio modem, at the same time the radio modem is connected to the terminal equipment (a computer, a hub, other segments of the network) with the help of a USB-cable.

EFFECT: improved quality of communication in modern networks of data transfer, protection of user against hazardous effect of electromagnetic radiation.

1 dwg

FIELD: information technologies.

SUBSTANCE: first repeater operating in a wireless network, comprising the second repeater, which may communicate with the first repeater, and the first and second wireless stations, which may communicate with at least one of the first repeater and the second repeater, comprises a reception device to receive a wireless signal at the reception frequency; a detection facility to detect, whether the specified part of the received wireless signal includes a varied part, so that therefore it is identified that the received signal arrives from the second repeater; and a transfer device for transfer of a wireless signal to one of the first and second wireless stations at the transfer frequency, thus for repetition of the wireless signal.

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35 cl, 40 dwg

FIELD: information technologies.

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35 cl, 40 dwg

FIELD: information technologies.

SUBSTANCE: method and device are proposed to transfer/receive connection identification (CID) in the communication system. Having detected the necessity to transfer its service, the mobile station (MS) sends a message of service transfer request to the first basic station (BS) that executes connection with MS. When receiving the message of service transfer request, the first BS sends to MS at least one CID to establish the connection with the second BS, to which MS will perform service transfer, together with the message of the service transfer response in response to the message of the service transfer request. MS receives CID by means of the message of the service transfer response.

EFFECT: reduced time delays in communication.

56 cl, 5 dwg, 4 tbl

FIELD: information technologies.

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56 cl, 5 dwg, 4 tbl

FIELD: information technologies.

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EFFECT: making it possible to probe channels for high throughput capacities.

12 cl, 14 dwg, 6 tbl

FIELD: information technologies.

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EFFECT: improved reliability of access to the secured network.

10 cl, 4 dwg

FIELD: information technologies.

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13 cl, 10 dwg

FIELD: information technologies.

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EFFECT: higher reliability of authentication and reduced load at transfer of service signals.

6 cl, 1 dwg

FIELD: physics; communications.

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EFFECT: reduced delays before wireless terminal finds suitable channel conditions.

66 cl, 26 dwg

FIELD: physics; communications.

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EFFECT: provision for several substitutive audio signals for call return.

26 cl, 6 dwg

FIELD: physics; communications.

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31 cl, 8 dwg

FIELD: information technologies.

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61 cl, 7 dwg, 3 tbl

FIELD: information technologies.

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EFFECT: reduction of power inputs and use of hardware resources.

18 cl, 5 dwg

FIELD: information technologies.

SUBSTANCE: system comprises subsystem of all-channel signaling processing, data base subsystem, services processing subsystem and operational maintenance subsystem, at that all subsystems are connected to communication network and accordingly realise information exchange; at that all-channel signaling processing subsystem performs function of OKC-7 processing; data base subsystem is used for storage of user data; services processing subsystem comprises one or more modules for processing of home location register services; operational maintenance subsystem comprises operational maintenance server, services acceptance terminal and close-range terminal of operational maintenance.

EFFECT: provision of possibility to service user of several types of networks via system of home location register.

5 cl, 2 dwg

FIELD: information technologies.

SUBSTANCE: in one version of realisation access network may assign group identifier (group ID) to every of pilot-signals associated with sector, for instance, on the basis of pilot-signals coverage areas, and transmit pilot-signals with appropriate group ID. PN shift may be used as group ID. Access terminal may group accepted pilot-signals in one or more pilot-signals group according to their group ID, and select representative pilot-signals from every group of pilot-signals for transmission of message about pilot-signal level. Access terminal may also use grouping of pilot-signals for efficient control of sets.

EFFECT: provision of efficient and reliable communication systems with multiple carriers.

32 cl, 13 dwg

FIELD: information technologies.

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5 cl, 28 dwg

FIELD: information technologies.

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43 cl, 5 dwg

FIELD: information technologies.

SUBSTANCE: method and device are provided for provisioning of one or more communication services of point-point set type, such as multimedia service of broadcasting/multicasting (MBMS), to one or more mobile terminals, or subscriber devices (AA). When one or more mobile terminals are moved to new zone of mobile communication system controlled by other network component, after connection to service, information is transmitted between network elements by method.

EFFECT: facilitation of continuous service reception by mobile terminals that moved, preserving network resources and increasing efficiency of mobile communication system.

95 cl, 10 dwg

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