Method and device for searching a call to a wireless terminal in a wireless telecommunications system

 

The invention relates to a method and apparatus for searching a call to a wireless terminal in a wireless telecommunications system. The technical result is the provision of reducing power consumption in the standby mode. Set the channel quick search call with minimal coding, which is transmitted as a short message quick search call for one from a set of time intervals of the search call. Message quick search of the call indicates that the request received at the communication and that the receiving communication terminal to handle the channel full search call with a higher degree of encoding, which is transmitted more detailed messages full search key for the next time interval. The terminal monitors the channel full search call only once made a brief message retrieval-call in the channel quick search call. 10 C.p. f-crystals, 6 ill., table 2.

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 is on call cell phone 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, fewer dropped calls compared to 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 in the given message retrieval call or paging message, the notifying cell phones or other types of wireless terminals, which is an 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.

And zero or more event records subsequent search of the challenges presented in table 2.

Table 1 simply 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 field control using a cyclic redundancy code (not shown).

For availability control paging messages cell television particular, cell phone periodically activates the processing circuit integrated RF and digital signal in accordance with how it is necessary for the successful processing beijinhooo 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 for processing signals 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 one aspect the invention provides a method of searching a call to a wireless terminal in a wireless telecommunications system, including transmission of messages quick search dial channel with less coding and creation of messages full of the search call on channel a higher degree of encoding.

In another aspect of the invention OEM home button Flex cable is the transmission of messages quick search call directed subset of the above set of wireless terminals, comprising the wireless terminal; and b) forming the full message search call identifying mentioned wireless terminal.

The invention also provides a method of searching a call to a wireless terminal from a variety of wireless terminals, comprising 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.

The invention also provides a method of receiving a message retrieval call, comprising the steps 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.

The invention also relates to a device for searching a call to a wireless terminal in a wireless telecommunications system containing means for transmitting messages brief search of the call channel with less coding and means for forming soo is eenie embodied in a new improved method and system for searching a call to a cellular telephone or other wireless terminal, which reduces power consumption in standby mode. Can be used two channel search call. In accordance with one embodiments of the invention sets 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 is also followed by the full message search call identifying specific 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.

A brief description of the drawings the Above and other features, objectives and advantages of the invention are explained in the detailed description of the variants of its implementation, illustrated in the drawings, which show the following: Fig.1 is a block diagram of a cellular telephone communications system; Fig. 2 is a timing diagram illustrating the temporal characteristics of the selected time intervals in the channel quick search of the call and the channel full search of the call; Fig. 3 is a block diagram illustrating the sequence of steps performed in the process of search engine call wireless interval; Fig. 4 is a block diagram illustrating the encoding is performed in the channel full of stages, performed by the wireless terminal during the standby mode, and
Fig.6 is a block diagram of a receiver constructed in accordance with one embodiments of the invention.

Detailed description of 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 communication system and a wired system, which is used to transfer encoded data alarm.

In Fig.1 presents a block diagram of a highly simplified cellular telephone system, which can be ispolzovanlu base stations 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 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 station generates signals direct communication line, comprising a group of channels straight line. The channels are defined by a set of orthogonal 64-element (or bit) Walsh codes, 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, in which p is transmitted synchronization data, 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 designation 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 5392287 (hereinafter patent '287) "apparatus and method for reducing the power consumption in the receiver mobile communication system" and 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 intervals ("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.

In Fig.2 is a diagram illustrating the timing channel full search call and short channel search call, configured in accordance with a possible embodiment of the invention. Channel quick search call roemenie intervals 32 full search 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 full search call occur with periodic repetition, which ensures we get the to shown in Fig.2, 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.

In Fig.3 presents a flowchart 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 a brief search of the call is calculated using the first function, hachirobei the rich 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. The wireless terminal 10 can handle the entire channel or part of a channel full search of the call based on the contents 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 we have the following equation:
(floor(t/4) - PGSLOT)mod(16*T)=0, (1)
where T is the cycle time of winterslow (ICVI). PGSLOT is determined using the following hash functions:
PGSLOT = floor(N x((h(LHDECORR)) mod 216)/216), (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 DECORR is calculated as follows:
DECORR = 6 X HSH_KEY[0..11], (3)
where [0. .11] there are 11 least significant bits of the 32-bit values HASH_ KEY.

The hash 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 to this temporary intervals 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 messages are sent a brief search of the call, which is described in more detail below. Preferably breelteldet 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 using the following equation:
QUICK_PGSLOT = 1+floor(N x ((40505 x (L16. (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 call is made, then the wireless terminal will then monitor channel full search and call for detection of the full message retrieval 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 the group of wireless terminals 10 that are associated with specific brewage calling over time (although they may continue to be informed about the call for the same period a brief search of the call), that ensures 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 channel search of the call, as described in more detail below, and send two messages search call is made within the appropriate time frame quick search call and messages full search call ASC 14 produces at step 46 a survey to obtain feedback, indicates 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 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 (incoming search call). Bit INCOMING_ PAGE in the first state (e.g., logical "1") UCU what tervalon quick search call and so 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., logical "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 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 messages, searches the search call formed in accordance with the standard IS-95A, is illustrated using table 1. As follows from table 1, 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 indicate more specifically, to a wireless terminal 10 directed search call from podnijeta wireless terminals assigned to the corresponding time interval of 30 brief search of the call. Multibyte reports strainbase longer 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. In Fig.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 embodiments of the invention.

As shown in Fig.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 with the aid of the code symbols are then subjected to a block interleaving using a block interleaver 62. The data from the block interleaver scribblenauts using the Boolean XOR circuit 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 uplifting transformation not shown).

According Fig. 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 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 Fig.4, the processing associated with the transmission of information over the channel quick search call, significantly 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 channel 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,obratno or interpretation of the transmission of low quality as a positive message retrieval call, as is described below.

In Fig. 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 is performed using a significantly smaller subgroups processing circuit signals 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 of the call, as shown in Fig.4, the receive processing preferably includes n is SIRENIA spectrum and demodulation using the assigned Walsh code. The resulting data is "soft" solutions directly processed to determine the transmitted logical level.

According Fig.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 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 retrieval call, when accepted as the C-unacceptable signal quality message quick search call is reduced to a minimum.

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.

At step 94 the 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 the beginning of the Sabbath.

In Fig.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 of "soft" 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 depot is olego 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. 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 is 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 the 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 the development of the " new " degree 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, the message full search of the 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 for STEMI, using two channels for the implementation of search calls to 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.


Claims

1. The search method call to a wireless terminal, comprising a) generating the message brief search of the call, (b) generating a message full search of the call, and a brief message retrieval call contains less information than the full message retrieval call, send a message full search Vysocany, the degree of encoding the first encoded channel is greater than the degree of encoding the second encoded channel, and a brief message retrieval call is transmitted over a time interval a brief search of the call in the channel search of the call, and the full message retrieval call is transmitted in a time interval of a complete search of the call in the channel search of the call, while (C) calculating a time interval, a brief search of the call is performed with the first use of hash functions to the mobile ID of the wireless terminal, and (d) calculating a time interval, a full search of the call is carried out by applying a second hashing function to the mobile ID of the wireless terminal.

2. The method according to p. 1, characterized in that it further includes the steps convolutional encoding messages full search call, direct spread spectrum messages full search call using sequence and the immediate expansion of the range of messages quick search call using the sequence.

3. The method according to p. 1, characterized in that it further includes the steps talapetra messages full search call using sequence and the immediate expansion of the range of messages quick search call using the sequence.

4. The method according to p. 1, characterized in that it further includes the steps interleave messages full search call, direct spread spectrum messages full search call using sequence and the immediate expansion of the range of messages quick search call using the sequence.

5. The method according to p. 1, characterized in that it further includes the steps of adding a time delay between when the message is brief search of the call and the transmission of a complete message retrieval call.

6. The method according to p. 1, characterized in that said mobile identifier is processed according to the logic EXCLUSIVE-OR function using the system time.

7. The method according to p. 1, characterized in that step C) is performed by using a first hashing function to the system time, as well as to the mobile ID.

8. The method according to p. 1, characterized in that it further includes the steps of receiving messages brief search of the call, the activation circuits and signal processing processing channel a full search of the call using the above-mentioned circuits signal processing.

9. The method according to B. p. 8, wherein the signal processing unit have reversed interleaver.

11. The method according to p. 8, wherein the signal processing unit contains the control scheme cyclic redundancy code.

 

Same patents:

The invention relates to a communication system, which consists of a system of radio and wire communication, and functions as a system of stationary wireless

The invention relates to communication systems and can be used to build computer networks via radio
The invention relates to systems for the transmission of text information from the mobile terminal with credit card payment

The invention relates to the field of radio communications

The invention relates to the field of radio communications, in particular to a system of personal wireless communication, and can be used in a mobile communication system

The invention relates to a device for encoding in mobile communication systems, in particular to a device for generating mask quasiorthogonal code

The invention relates to the transmission of radio communications from one point to many points and can be used, in particular, though not necessarily, in accordance with the Protocol packet radio service General purpose APRON) proposed for mobile radio

FIELD: data organization and control in cellular communication networks.

SUBSTANCE: proposed method includes generation of SMS message in the form of sequentially disposed data blocks starting from pointer block followed by generation of main data block, generation of first next data block with floating point numbers including compression operator, number operator, and floating-point representation, generation of next data blocks indicating only compression operator and mantissa whose value for this compression is found from expression M(l

calckj
)= M(ΔLi) 2m - j, where M(lcalckj
) is calculated value of mantissa with compression operator "k" and mantissa length of (m - j) bits; m is capacity of mantissa given as base one in first next data block of SMS message; j is capacitor of one of k mantissas given and stored in sending-end memory; M(ΔLi) is fractional part of difference of two adjacent numbers transferred in desired order.

EFFECT: elimination of other-than-data bits from message being transferred.

2 cl, 2 dwg

FIELD: radiophone groups servicing distant subscribers.

SUBSTANCE: proposed radiophone system has base station, plurality of distant subscriber stations, group of modems, each affording direct digital synthesizing of any frequency identifying frequency channel within serial time spaces, and cluster controller incorporating means for synchronizing modems with base station and used to submit any of modems to support communications between subscriber stations and base station during sequential time intervals.

EFFECT: enhanced quality of voice information.

12 cl, 11 dwg

FIELD: radio communications.

SUBSTANCE: radio network controller sends value of power deviation for controlling power of transfer of high-speed dedicated physical control channel of ascending communication line, when user equipment enters service transfer zone, in cell communication system, containing radio network controller, assembly B, connected to said controller and user equipment, being in one of at least two cell nodes, occupied by assembly B. assembly B sends data to user equipment via high-speed jointly used channel of descending communication line and user equipment transfers data, notifying about data receipt state, to assembly B along ascending communication line. Controller sends to user equipment a value of deviation of power to determine transmission power adjustment for ascending communication line, if it is determined, that user equipment is within limits of service transfer zone. Controller sends to assembly B value of power deviation, to allow assembly B to determine threshold value for data determining, noting data receipt state, dependently on power deviation.

EFFECT: high-speed data delivery to user equipment.

5 cl, 31 dwg, 4 tbl

FIELD: cellular communication networks for burst data transmission.

SUBSTANCE: proposed method and device can be used, in particular, for exchanging acknowledgement information between mobile station and cellular communication network. Radiophone device receiving information about network operates in acknowledgement information exchange mode; this information is identified and transferred from network acknowledgement module. Radiophone conveys acknowledgement information to network through main allocated control channel in response to mode information. Otherwise radiophone device transfers acknowledgement information interchanging acknowledgement of time block stream in response to mode which is other than main allocated control channel.

EFFECT: enhanced throughput capacity of network.

16 cl, 4 dwg

FIELD: communications.

SUBSTANCE: set includes several individual platforms 12 lighter than air, distanced from each other above continuous geographical area within limits of previously set height range, so that all-around coverage is provided within vicinity of current geographical area. Each platform has cover for filling with adjusted volume of gas of low density to provide for float ability of platform. Also, each platform contains device for transferring signals, connected to cover, by means of which signals can be transmitted from platform into said continuous geographical area.

EFFECT: broader functional capabilities, higher bandwidth, higher efficiency.

6 cl, 14 dwg

FIELD: radio engineering.

SUBSTANCE: for activation of one of multiple service for transferring packet data in inactive sate base station sends to mobile station a paging message, containing identifier of link to service, identifying service being subject for activation. If a sample of service for service is inaccessible, then mobile station sends response message to base station about inability to restore service connection. Then base station closes connection to show that service connection can not be restored.

EFFECT: lower costs, higher efficiency.

2 cl, 14 dwg

FIELD: radio engineering.

SUBSTANCE: invention allows to determine, at least, in measurements report, whether information transfer is performed in accordance to first communication standard, at length of frequencies range, to which communication station is adjusted, while report block generates measurements report, containing value, appropriate for result.

EFFECT: simplified dynamic frequency selection.

2 cl, 8 dwg, 2 tbl

FIELD: mobile communications; mobile communication systems for high-speed data transfer.

SUBSTANCE: when base station renders relaying service, mobile station receives configuration information for base stations adjacent to servicing base station. Configuration information shows if service transmission is possible from servicing base station to adjacent base stations and if adjacent base stations render relaying services. In the course of service transfer to adjacent base station, in case new one is adjacent to servicing base station and new base station does not render relaying service, mobile station requests new base station to render relaying service. If there is base station that does not render relaying service, mobile station requests servicing base station to initiate relaying service. Then servicing base station requests adjacent base stations to initiate relaying service.

EFFECT: minimizing useless consumption of communications resources.

22 cl, 12 dwg, 2 tbl

FIELD: communications engineering.

SUBSTANCE: mobile unit is dynamically configurable and has a logical tree. Signs are inputted into network control device, reacting on request of this communication or on initialization by mobile unit. In case of initialization in network generator of message with request, positioned in network control device, generates a get-type message for request for sending some configuration signs to network control device. Mobile unit in case when get-type messages is delivered thereto extracts requested information with selected detail level and returns signs to network control device.

EFFECT: generally efficient mechanism, facilitating extraction or other information exchange from mobile unit.

4 cl, 7 dwg

FIELD: technology for providing a service for network terminal belonging to data transfer network.

SUBSTANCE: when SSF detects presence of a short message transfer service request, SSF transfers the request to gsmSSF. Then gsmSCF searches a database to determine, whether destination client appropriate for destination address of short message requested call rerouting for short message transfer. If negative, short message is sent to mobile destination station. If positive, gsmSCF enables logical circuit of service for rerouting short message at receiving side for performing SSF call processing: rerouting of short message, primarily directed to current mobile station, to another mobile station or into data transfer environments.

EFFECT: improved flexibility of service for transferring short messages.

9 cl, 4 dwg, 2 tbl

Up!