Method and communication system for transmission of voice messages and data, providing improved separation of interference

 

The invention relates to a method of Radiocommunication for the transmission of voice messages and data and system for implementing this method in a communication system mdvr (MDR - multiple access with time division), and channel (a, b, C, d) communication includes at least one time interval from a set of sequential time intervals (0-23) of the image-forming MDR, and the time interval (a, b, C ) frame makes a jump in position between successive frames (jump (k), jump (k+1). Jump time interval (a, b, C) depends on the type of communication channel for which the allotted time interval (a, b, C). The technical result is the creation of a method of radio communication and the devices that use pseudo-random switching (jump) time intervals of the frame mdvr suitable for coexistence of different types of links in the same frame. 4 C. and 17 C.p. f-crystals, 7 Il.

The technical field to which the invention relates the Invention relates, generally, to communication systems and, more specifically, to radio communication systems for transmission of voice messages and data between two or more blocks of communication, at least one of which may be mobile the radio for mobile telephony and data transmission. In General, there may be two types of mobile communications systems.

One is cellular communication, providing service for mobile subscribers, which can move relatively quickly at a relatively extensive areas called cells. Analog cellular systems, such as AMPS, ETACS, NMT-450 and NMT-900, have been deployed on a global scale. Digital cellular systems are referred to as IS-54B, D AMPS in the United States, and PDC in Japan and pan-European GSM system.

The wireless radio is another system, which includes the whole range from simple home wireless phone service wireless systems capable of servicing hundreds or even thousands of wireless communication units in larger offices or manufacturing plants, and so on, and local public relations. Analog wireless systems are called HUNDRED, CT1 and CT1+. Digital wireless systems referred to as CT2, CT2-CAI, ST3, PHS and DECT.

GSM, D-AMPS, PDC, and ST3, PHS and DECT use the technique of digital access, known as MDR (multiple access channel separation of the time), and transfer are carried out in time intervals and the set of time intervals collected in the frame. Some auxiliary digital system snowline radio communication between connected blocks of the system. Generally, these mobile wireless systems are arranged to provide service on many carriers (MN) in the radio band. That is, the transmission on a separate carrier is provided with either MDR or mdcr.

In cellular systems such as GSM, one or many of bearing are for individual cells. Cells, which are spaced a sufficient distance can reuse the same carrier without distorting effect. This so-called scheme of re-use of the frequency allows the operator to maintain the long scope with many users and only a limited range.

Wireless systems, such as DECT and PHS, not based on the reuse of frequencies. Instead, all bearing are valid for each cell. The system determines what carrier and what communication channel such carrier can be used for communication with the minimal amount of interference. Bearing and communication channels dynamically allocate before and/or during transmission, which is called DRC (DRC - dynamic allocation of channels). Accordingly, do not require frequency planning or engagement of the operator, which controls the frequency which may telephone network (PSTN), or for wireless extensions LAN (local area network) used the so-called alicesinaerie band radio. That is, subscribers do not need a license to operate radio equipment in this band radio. However, the rules established for without licences bands corresponding regulations, such ETSI (European Telecommunications Standards Institute European Institute of standards and long-distance communications) in Europe and the FCC (Federal communication commission Federal communications Commission) in the US, warn the user about the cost per use them all stripes. Such rules typically include circuits prevent collisions or extensions. In the case of expansion of the transmission of the subscriber is extended to the entire bandwidth. Because different programs are not coordinated, should be used in the radio interface, which is resistant to interference.

Global alicesinaerie transmitting band was determined at 2.4 GHz. This ISM (Industrial Scientific Medical - Industrial Scientific Medical) transmitting band is open to all equipment that meets the rules of the FCC and ETSI. Coordination between systems to reduce interference is not allowed. This means that the air interface of the communication system is in this unlicensed band, must adhere to strict rules established by the ETSI and FCC. In the ISM (industrial scientific medical) transmitting the 2.4GHz band is required. This means that the DCA scheme used for DECT, cannot be used. Instead, it should be used, for example, the expansion of the hopping frequency (jump frequency (if) or the expansion of direct sequence (PP).

In the International application WO 93/17507 applicant disclosed a few of the inverter circuits for communication systems mdvr, and radio communication units perform transmission by radio in accordance with schemes pseudorandom Sackboy adjustment channels. In US-A-5430775 disclosed diagram of frequency hopping, and a separate communication units synchronized to rebuild irregular synchronously.

In the International application WO 93/22850 discovered a way to increase the diversity of interference in the communication system mdvr, and uses a stepwise rearrangement frequency and interference diversity enhanced, as communication channels also carry jump in the raster interval. That is, instead of fixing the distribution of time intervals time intervals pseudorandom switch IU the time intervals). However, it is recommended to keep the control channel of the cell distribution fixed time intervals.

In EP-A-0399612 disclosed data transmission in full-duplex channels with time division, in which the asymmetric nature of most data protocols intervals that do not participate in data transmission, are exempt and are suitable for the purposes of the one-way transmission.

When using any or both of the circuits of the inverter and PV transmission of information becomes a pseudo-random both in terms of frequency and time. That is, during the session of the communication channel occupies a different position in terms of frequency and time, so that interference occurring in the communication channel are averaged across all channels in the transmit band. It is particularly preferably in the transmission of voice messages.

In fact, cellular and wireless communication systems support the transmission of voice messages and data. For the purposes of the present description, the term "voice" is used to refer to the transmission of voice messages in real time, while the term "transfer" data is applied to the transmission of other information, including voice messages in a mode that is different from the real lie is selecionou scheme for retransmission of data packets, which were received in error. In the scheme ASPP (ASP - automatic resend request) transmitter data will be informed by the recipient of the information about the previous transmission. If the reporter was informed that the admission was erroneous, the erroneous data is automatically relay. In the system mdvr like DECT, can be installed asymmetric data line, in which most of the time intervals of the frame mdvr away for simplex data transmission, i.e. in only one direction. However, at least one reverse channel must remain current to provide ASP information. To minimize lag and, accordingly, the maximum throughput of the reverse channel directly follows the data channels. As a result, the receiver can confirm the reception of all data immediately preceding the backward channel.

However, using the scheme of pseudo-random switching time intervals, due to the random nature of the scheme switch reverse channel in a separate frame may end before the data packets. Accordingly, directly acknowledgement of received data packets in W the formation ASP leads to the automatic retransmission of previously transmitted data transmitter. It does not take into account the fact that the data could arrive correctly. For professionals it is clear that the system throughput is significantly reduced and reaches on average only 50% of the maximum bandwidth.

Summary of the invention the present invention is to provide a method of radio communication and equipment for carrying out the method using pseudo-random switching (jump) time intervals of the frame mdvr suitable for coexistence of different types of links in the same frame.

In particular, the present invention is the provision of optimal allocation of time slots of the frame mdvr to maintain a voice message in error-prone wireless systems, such as alicesinaerie ISM band.

Since WO 93/22850, as the closest technical solutions known from the prior art, which disclosed a method of radio communication in the communication system MDR, and the communication channel includes at least one time interval from a set of consecutive time intervals, the image-forming mdvr, and is the jump time interval of the frame in position between placentas is tion, so as the time interval allocated to the transmission channel voice messages, selects a pseudo-random way in position between successive frames, and the position of the time interval allocated to the data channel remains fixed between successive frames.

In accordance with the method of the present invention, the jump time slots in the frame mdvr is controlled in such a type of transmission channel as a voice communication channel and the data channel. In accordance with the invention, the jump time interval between successive frames is limited to the time intervals allocated for voice communication channels, whereas the time intervals allocated to data channels occupy fixed positions in the frame.

This implementation of the method in accordance with the invention provides optimal separation of interference with speech communication, whereas the data transfer can be made under the scheme ASPP. This is because the sequence of data channels is not affected when implementing the method in accordance with the invention, so that the reverse channel is always available after you have transferred the data is due to the lack explode interference time intervals, allocated to data channels. However, using the scheme ASPP, malformed data packets can simply be substituted through the use of retransmissions.

In another embodiment of the method in accordance with the invention to improve explode noise for both channels of voice communication and data communication channels radio system made for radio communication in a predetermined radio frequency band transmission, which includes a set of radio frequency transmit channels, and each RF transmitting channel includes many communication channels in the frame mdvr. The diversity of interference increases with the presence of hopping each frame mdvr on frequency transmission channels.

That is, when using the schema frequency hopping for frames mdvr, such that each successive frame is transmitted in the subsequent RF transmitting channel interference time intervals data is averaged over the RF band transmission system.

With the goal of preserving the integrity of the time intervals in another embodiment of the invention the position of the jump time slots allocated for the channel In the preferred embodiment of the method in accordance with the invention ensures a clear separation between time intervals, reserved for voice communication channels and time intervals allocated to data channels, since the time intervals for data transmission is disposed at one end of the frame, and the time intervals for voice communication discharged from the other end of the same frame. Preferably for voice communication divert the front time intervals of the frame or half frame, and data assign back the time intervals of the frame or half frame. That is to say that in the communication system MDR/DDA (duplex time division) and the data are passed in separate halves of the frame.

Grouping time intervals in successive bundles, i.e. grouping the speech time intervals and grouping time intervals of data, it is advantageous in respect of noise, because it limits the number of collisions due to partial overlap. In addition, there is maximum space to jump over speech time intervals.

In accordance with another embodiment of the invention achieves the jump time interval, for each successive frame is determined by various temporal offset that is added to the temporary intesco. Time shift includes a multiple of the time interval.

The number of positions at time intervals available for pseudo-random switching, changes dynamically, when the time intervals allocated for data transmission, added or omitted in the frame. If the frame mdvr includes N time intervals, the space temporary jump M frame is given by the expression M=N-Nd-1, where Nd is the number of time intervals of the frame mdvr allocated for data transmission. In the case of frame MDR/DDA time shift M is determined by the expression M=N/2-N d-1, where N d is the maximum number of time slots in the half frame MDR/DDA occupied by data transmission channels. Note that due to asymmetric data transmission channels, the number of time slots allocated for data transmission may differ from one half of the frame to the other half of the frame MDR/JEM.

In a preferred embodiment of the method in accordance with the invention, the time intervals pseudorandom switch (jump) surround the time interval M-1, counted from the end of the frame or half frame, which are assigned pseudo-random time intervals parecer procedure of turnover can be carried out separately for each half of the frame.

For the purposes of synchronization timing adjustment frame is transmitted to each connected unit of a wireless system, operating on a communication channel suitable for the jump time interval, such as a voice communication channel. In the communication system, organized for radio communications between access block radio or base station and multiple radio remote units, such as portable telephones and computer equipment, for example, the time shift being passed from blocks access to the radio link to remote blocks radio communication.

In embodiments of the invention, in which frames are mdvr make the leap between the radio-frequency transmit channels, the frequency bands of the transmission, quick synchronization between blocks radio, in another embodiment of the invention with one continuously emitting unit, such as block access to radio, the other unit scans a separate radio-frequency transmission channel for receiving the transmission and is included in the jump frames when receiving a transmission. If there is no active communication channel, the transmitted one or more so-called bogus carriers, for which there is a jump in time and frequency.

owiny frame until until it receives a message containing information regarding the sequence of jump time and a time offset.

For the purposes of scanning in one embodiment, the method in accordance with the invention block the radio, scanning, dangle frequency in the entire RF transmission band, and a radio frequency transmission channel is scanned by number of frames is at least equal to the number of radio frequency transmission channels of radio communication systems.

The invention also relates to a communication system that includes multiple blocks access to radio and multiple radio remote units, each unit provides access service radio in a limited geographic area or cell. Blocks access to radio and remote blocks radio communication made to provide communication in accordance with the above method.

In a preferred embodiment, a radio communication system in accordance with the invention, blocks access to the radio link are transmitted in the common radio frequency band transmission, and each of the blocks access to the radio link has an individual sequence of jump radiofrequency transmitting the La radio communication in industrial, scientific and medical (ISM) band of frequencies from 2400 to 2483.5 MHz, with 79 radio frequency transmission channels, each channel has a width of the transmission bandwidth of 1 MHz, and each frame mdvr has a length of 10 MS with the speed of a jump of 100 leaps/s radio frequency transmission channels, and uses the transmission MDR/DDA, in which each half frame includes 12 consecutive time intervals.

The invention further relates to block access to radio and block radio communication systems for wireless communications, comprising a means of transmit-receive and management tool for the implementation of radio communication in accordance with the method described above.

List of figures Above and other features and advantages of the invention are disclosed in the following description with reference to the drawings, in which: Fig. 1 - typical wireless home multimedia use, which, in particular, may be implemented with the present invention; Fig.2 diagram of the digital transmission MDR/DDA known from the prior art; Fig. 3 - jump time intervals, known from the prior art, the applicable transfer scheme MDR/DDA in Fig.2; Fig. 4 - the preferred variant of the method in accordance with the present invention;
Fig.6 - scanning synchronization jump frequency pre-synchronization jump time;
Fig.7 is a scanning method in accordance with the invention, a block of radio communications that are not captured in standby mode.

The invention disclosed with reference to preferred embodiments of which however the invention is not limited.

In Fig. 1 shows an example of a typical home entertainment applications of wireless communication systems that provide service such as voice messages, and data.

In building 1 unit 2 access to radio, also called base station or NCR (NCR - stationary part of the radio equipment), connects the transmission line 5 connection with the public switched telephone network (PSTN)/digital network integration functions (PSTN/CSIF). Additionally, the management tool can be linked with unit 2 access to radio. Further, the data processing equipment in the form of a personal computer 6, for example, portable or wireless mobile phones 7 is applicable in building 1, also called portable part (FC). Each remote unit 6, 7 radio and unit 2 access to the radio link includes the medium is wireless lines 9 links, which support both voice messages and data and cover the whole building with adjoining areas. Several lines 9 links can operate simultaneously. In the shown application of the external communication unit 6, 7 Radiocommunication provided by wireless lines 9 links, the intermediate block 2 access to radio and line 5 connection with the PSTN/CSIF. Internal connections between the blocks 6, 7 radiocommunications provide the links 9 and block 2 of the access radio link.

An example of a radio communication distance for both home and outdoor use is described, for example, in European application 0716514 patent.

To a person skilled in this technical field, it is obvious that several blocks 2 access radio can work in building 1 with adjacent buildings that have overlapping service areas, and blocks 2 access radio neighbouring buildings can have overlapping service areas or coating. For blocks 2 access radio link operating in accordance with existing wireless technology low power mdvr (MDR - multiple access with time division, such as the previously mentioned ST3, PHS, DECT, each of the blocks 2 access to radio and blocks nahoditsya ranging from a few meters to 10 m and 400 m

Following the known DECT (DECT, ABS - digital European cordless telecommunications), information on air line 9 communication is transmitted in accordance with the Protocol MDR/DDA, and the first half of the frame is used for transmission and the other half of the frame is used for the purpose of receiving or Vice versa. Frame CABS/mdvr includes twenty four time intervals and time T repeat frames. During the first half of the frame, i.e. the first twelve time intervals, denoted by t0, T1,...T11, the data are transmitted from the access block of the radio link to the remote unit radio, while in the second half of each frame, i.e., the second twelve time intervals denoted by R12, R13, R23...deleted blocks radio transmit information to blocks access to radio. Typical full-duplex line contacts between block access to radio and the remote unit radio sets the interval in the first half of the frame and respectively set the interval in the second half of the frame. Each time interval typically contains control data, system data or user data.

In CEBS ten bearing available for transmission of information so that there is a maximum of 120 duplicae 480. Accordingly, the system bit rate is 1152 kbit/S. In Europe radio frequency transmission band CABS extends from 1880 to 1900 MHz.

In CEBS defined radio channels or media. The carrier frequency and the intervals used for the communication channels are assigned during configuration. Before switching to a different frequency is required, for example, send the radio to another block access to radio as a remote unit radio moves (miakeana transmission) or if a separate carrier frequency and communication time interval is broken (vnutripechenocnaya transmission). The combination of carrier frequency and time interval continuously adaptive chosen during transmission, which is known as NDC (NDC - continuous dynamic channel).

In systems that do not support dynamic allocation of channel, or radio communication systems, in which the expansion of communication channels is required, for example, in accordance with the requirements established by the FCC and ETSI for the frequency bands of the transmission 2.4 GHz ISM (industrial scientific and medical - industrial, scientific and medical), you can use the jump time time intervals in order to reduce distortion caused by, for example, the villas MDR/DDA, such as shown in Fig.2 in accordance with the aforementioned prior art.

In Fig. 3 shows two successive frames MDR/DDA showing jump (k) and jump (k+1), respectively. The first half of each frame is transmitting and a half, denoted by TX, while in the second half of each frame is taking Rx. Next is assumed that you have installed the duplex channels, and radio.

Assuming that the time interval allotted for certain communication channels, jump over the interval 10 positions between successive frames, channel And communication, which is located at the position of the time interval 1, during the jump (k) will be in the 11th position of the time interval when the next jump (k+1), etc. in the same way the channel will be shifted due to time frame 2 on the time interval 0 and the channel of communication is shifted by the time interval 1, corresponding to half of the frame TX. Half frame Rx this example used the same scheme of the jump, i.e. jump through ten positions of time intervals to maintain the interval division of the twelve intervals for a duplex channel in the frame.

Although this scheme leaps works very well for voice communication, technical request for re-transfer) scheme. In this scheme, if the reception is incorrect, the request for retransmission is transmitted from the receiver to the transmitter immediately after receiving erroneous data in the same frame.

For example in Fig. 3 that on TV and In connection transmit data, and the channel is designed to send the request ASP. During the jump (k) data is transmitted in the time interval 1, the data which should be confirmed in the time interval 14. That is, during data reception and confirmation, there is a time period equal to twelve time intervals. When personnel time 10 MS 5 MS available for evaluation of data.

Let's further say that applies jump time, disclosed above. As is evident from Fig.3, during the jump (k+1) channel And the data is moved to the time interval 11, while confirming the channel takes place in the time interval 12, that is, immediately after receiving the data. In fact, the problem of confirmation can occur if the processing circuit is not fast enough for evaluation of the received data for errors. A large part of the radio communication equipment available at the present time, not able to maintain the relay in the interval, neposredstenno.

In radio systems, in which time intervals can be chosen adaptively for transmitting or receiving, for example, when a large amount of data must be transferred from the access block of the radio link to the remote unit in the form of a personal computer, install the asymmetrical lines of communication data. Such lines of communication takes many time slots in the frame in the direction of the remote communication unit (downward line) and, for example, only the time interval in the direction of the access block radio (ascending line). When using the jump time there is a risk, namely that the reverse channel is available before all the data in the frame have been transmitted, so that the confirmation in the same frame is impossible. No confirmation will automatically relay data even if no errors appeared, which significantly reduces system bandwidth according to the data, and on average is achieved only 50% of the maximum bandwidth.

In Fig. 4 shows an improved scheme of jump time intervals in accordance with the present invention. With the purpose of explaining the invention it is assumed that using scheme swego interval between successive frames is performed depending on the type of communication channel, for which the allocated time interval.

In Fig.4 time intervals a, b and C are designed for voice communication channels, whereas the time intervals d provide data transmission, i.e., the nonverbal information in real time, for example, using ASP Protocol.

In accordance with the method of the present invention, the time intervals d allocated to data channels occupy a fixed position in the frame, whereas the time intervals a, b and C, reserved for voice communication, make the jump in position between successive frames. As shown in Fig.4, the channel And voice jumps from time interval 1 to leap (k) on the time interval 6 jump (k+1) relative to the first half of the frame, i.e. the length of the jump is 5 positions of time intervals.

In this example, the speech time intervals may not jump at time intervals of data with the aim of preserving interval integrity and to prevent overlapping intervals. In the above example, the speech time intervals are surrounded by time interval 6, so that the length of the jump time interval 5 interval of positions of the channel In speech communication will be pereival connection jumps from interval 3 jump (k) at time interval 1 in the jump (k+1). The same scheme of a jump is used for time intervals voice communication in the second half of each frame.

As is evident from Fig.4, the time intervals d allocated for data transmission is not damaged by jump time, so that the reverse channel will always be behind the data channels that transmit data, which guarantees the correct confirmation within the same frame.

Because the voice communication channel or media voice and data transmission channels or data carriers will not conflict, establishes a clear separation between the carriers of voice messages and data. The native data set from one end of the frame mdvr, i.e. half of the frame in case of contact, MDR/DDA, whereas the native voice communications are established with the other end of the frame mdvr or half frame. The voice communication channels allow you to make the jump intervals that are not used by data channels. The timing shown in Fig.4, is consistent with this preferred option.

For distribution of data channels during transmission of the first data set special duplex communication, which is also used for dodaci data with the interval in both halves of the frame. If the required number of intervals is odd, can be installed one-way communication channel or media (including only a single interval). The data channels are preferably placed in consecutive time intervals with interval as possible within the frame or half frame. Grouping intervals in successive packs advantageous with respect to interference, because it reduces the number of collisions due to partial overlap. In addition, more space is left for the jump time of the native speech signal.

If the data channels have been allocated to time slots, as described above, the remaining space in the frame or half frame can be used for duplex voice communication channels. To minimize collisions voice communication channels will be grouped in the same way, i.e. they will always take a reference time interval with the smallest possible number. If the voice communication channel with a smaller reference number is released, the voice communication channel with the highest reference number will be given just released by the time interval.

< / the jump time interval, can change dynamically, if the media is added or released.

For a system with N interval positions in the frame space M of jump time frame can be determined as
M=Nd-1,
where Nd is the total number of time intervals of the frame mdvr involved in the data transmission channels.

In radio systems mdvr/DDA space M of jump time is determined by the expression
M=N/2-N d-1,
where N d is the maximum number of time slots in the half frame MDR/DDA involved in the data transmission channels. It accordingly for duplex and simplex data channels in the frame. Using this definition of M in all cases, one pair of intervals (m, M+N/2) is blank and can be used to request media from other blocks.

Applying the above to the example shown in Fig.4, with N=24 and Nd= N d= 4, we obtain that M=7. Accordingly, the time intervals allocated for voice communication, surround intervals M-1, counted from the end of the frame mdvr, i.e. half of the frame in the case of communication systems mdvr/DDA, from which distribute channels of voice communication. That is, in the present example, the position of the interval with the lowest number.

Jump time is achieved by adding the verse and the second half frame schemes MDR/DDA and applies similarly to all voice channels. This temporal offset with respect to the time intervals may be selected randomly, however, is smaller than the available space M of jump time. Time shift is wrapped around the edge of space jump time, and the channels that are shifted out of the space of jump time, return to the beginning of the frame, as described above. Using this scheme duplex circuit performance MDR/DDA remain intact, i.e. intervals ascending and descending lines of communication are in different halves of the frame.

For professionals it is clear that the different time shifts can be applied in various radio communication systems with the purpose of even increasing explode interference in a communication system that includes multiple blocks access to the radio link with overlapping coverage or service areas.

In the method according to the present invention, as described above, the data transmission channels do not extend the time in which they can be prone to distortion pulse jammers.

Although the harmful effects of such distortion can be reduced through the use of transfer Protocol ASP, with the aim of increasing the resistance to pomposiello partitioning of the available radio frequency band transmission on the multiple frequency channels and by forming successive frames, to be transmitted in a serial transmission channels, the impact of the jammer on one or more frequency channels is averaged over all available frequency channels.

This type of jump frequencies in addition to the jump time intervals (PV) provides the preferred communication system for use in the ISM band of 2.4 GHz, in which serious hindrances are microwave ovens for cooking at home. These microwave ovens operate just in the middle of a band of 2.4 GHz and violate a number of frequency channels.

In a preferred embodiment of the invention, in particular, for use in radio frequency ISM band transmission determine the 79 RF channels having a bandwidth of 1 MHz, so that the length of the sequence of jump frequency equal to 79. The switch frequency is applied cyclically, so that after 79 leaps frequency again use the same frequency. Given the frame mdvr, having a length of 10 MS, set the speed of a jump of 100 leaps/s radio frequency transmission channels.

An important significant result in using the scheme leaps systems is synchronization: tie ronisize or data collection procedure should be optimized to minimize the delay of data collection and the power consumption in the standby mode.

Consider the communication system shown in Fig.5. Shows the number of independent blocks X, Y, Z access to radio, having a floor or area x, y, z maintenance, respectively, and using the circuit as the inverter and PV in accordance with the present invention. If there is no flow to block access to radio, it supports at least a dummy carrier, providing a beacon, that is, media that is not transmitted user data (see Fig.2). To avoid constant clashes between the two neighboring blocks access to radio, as the jump time, and the jump frequency is used for fictitious media. Different blocks access to radio preferably have different sequence leaps, as the FC sequence deduced from the identity of the access block of the radio link. Each block access to radio broadcasts its identity, so the remote communication unit that wishes to communicate with that block access to the radio link may get used a sequence of jump. The appropriate sequence of jump frequency is known from the prior art.

If, as shown above, the FC sequence is such that the same often is consistent, not captured by the remote unit radio can wait on a single transmitting channel as is done scanning all time intervals. As soon as it receives a true signal is captured, the unit can monitor the transfer by jump at the same speed and consistency leaps of time, and received information about the identity.

The sequence of the jump time can be made depending on the frame number. When determining the absolute frame number, which often transmit, the unit that has detected the inverter synchronization can accompany the transmitter by skipping frames and scanning all his time intervals. Once the frame in which the absolute frame number is transmitted, it can also be installed PV synchronization. The optimal point in time to jump is a N/2+1 intervals after the interval, which was adopted on the true signal for the communication system MDR/DDA containing N time intervals. This is shown in Fig.6.

Unit W, which scans do not know which block X time interval used for transmission. Two extremum detected as X1, i.e., the first time interval in half is shaded. If the block W jumps to the next frequency exactly N/2+1 interval after the leading edge of the received interval, a complete scanning cycle in the following transmitting frequency band will capture any shifted by the time the media that defines the nature of the shift, which is indicated with a cross in the corresponding half of the frame. The scan cycle can be limited to N-1, which gives one interval to configure the frequency synthesizer block W scan.

The unit is in standby mode preferably has a very low duty cycle to conserve energy consumption. Periodically, the unit should "Wake up" to check system message retrieval call. Blocks that are captured, that is, the inverter and the PV synchronized block access to the radio link may have a very low duty cycle. Between periods of "Wake up" the remote communication unit in the standby mode can always "Wake up" and to communicate as it is completely synchronized with the access block of the radio link. On the contrary, block access to the radio link must wait until the unit is in standby mode "wakes up" before it can connect. However, if the inverter and the PV has not yet been established, the remote communication unit should posbase in standby mode must slide along the transmission cycle of the access block of the radio link.

When the access block of the radio link with the radio frequency transmitting cycle of 79, as described above, a series of "Wake up" the remote communication unit in the standby mode can be selected, for example, 78. In this case, the remote unit scan (BS) in the standby mode is step -1 through the loop block access to radio or base station (BS), as shown in Fig.7. Preferably the time of the scan cycle in the standby unit is slightly more than the steps in the moving process, to account for the misalignment of the intervals.

To speed up the process of data collection system message retrieval call is sent more often or even all of the empty intervals or bogus carriers, including the system message retrieval call. Using the FC sequence in reverse order, i.e., converted to normal FC sequence, the remote communication unit in the standby mode is switched into active mode in which it continuously carries out the scan cycle.

It is obvious that for use with the present invention may be provided with blocks access to radio and remote blocks radio communication with the appropriate transceiver and control means is made to work in place which does mdvr/DDA Radiocommunication systems it's not limited to only this type of Radiocommunication systems and is applicable for mobile, wireless, or other radio communication systems.


Claims

1. Way radio communications in the communication system multiple access with time division multiplexing (mdvr), consisting in that the channel (a, b, C, d) communication includes at least one time interval from a set of sequential time intervals (0-23) of the image-forming MDR, and the time interval of the frame makes the jump in position between successive frames (jump (k), jump (k+1)), wherein the time interval allocated for the channel (a, b, C) voice communication, does the jump in position between successive frames (jump (k), jump (k+1)), and the position of the time interval allocated for the channel (d) data remains fixed between successive frames.

2. The method according to p. 1, characterized in that the position of the jump time intervals allocated to channels (a, b, C) voice communication, limited to the time intervals of the frame is not assigned to channels (d) data.

3. The method according to p. 2, characterized in that the time intervals for key take away from the other end of the frame.

4. The method according to p. 3, characterized in that the time intervals allocated to channels (d) data are grouped in adjacent time intervals, as far as possible, from the specified end of the given frame.

5. The method according to p. 3 or 4, characterized in that the time intervals allocated to channels (a, b, C) voice communication, as far as possible, grouped in adjacent time intervals from the specified other end of the given frame.

6. The method according to any of paragraphs. 1-5, characterized in that each mdvr frame is divided into a first half (TX) and second half (Rx) sequential time intervals, and a duplex communication channel includes a corresponding time interval in each half of the frame in accordance with duplex scheme time division (DDA) and the mentioned time intervals make the jump, and they are chosen in accordance with the half frame.

7. The method according to any of paragraphs. 1-6, characterized in that for each successive frames define different temporal offset that is added to the time intervals specified frame allocated for the channel (a, b, C) voice communication, and the specified time shift contains a multiple of time interval.

Oka M time frame is determined in accordance with the expression
M= N-Nd-1,
where Nd is the number of time intervals specified mdvr frame occupied channels (d) data
and if mdvr/DDA frame is determined in accordance with the expression
M= N/2-N d-1,
where N d is the maximum number of time intervals in a half frame (TX, Rx) specified MDR/DDA frame occupied channels (d) data.

9. The method according to p. 8, characterized in that the time intervals of jump surround the time interval M-1, counted from the specified other end of the specified mdvr frame, i.e., the specified first and second half of the frame in case ndvr/DVR radio system.

10. The method according to any of paragraphs. 7-9, characterized in that the temporal offset of the frame is passed to each communication unit of the specified radio system operating on the channel (A, b, C) voice communication in given frame.

11. The method according to any of paragraphs. 1-10, characterized in that for each frame, you specify a start point of the frame specified starting point of the frame is passed to each communication unit of the specified radio system, and a sequence of leaps of time intervals associated with the specified initial point of the frame.

12. The method according to any of paragraphs. 1-11, characterized in that the radio system is made for radio is Alov transmission, each RF transmission channel includes multiple communication channels in mdvr frame, and each frame mdvr makes a jump in position between the said radio frequency transmission channels.

13. The method according to p. 12, characterized in that each subsequent frame is passed to the subsequent radio transmission channel.

14. The method according to p. 13, characterized in that the radio system includes at least first and second blocks radio, and the specified second unit continuously transmits in at least one time interval of the frame, and between the first and second unit has a radio channel, where the first unit scans a separate radio-frequency transmission channel for receiving transmission from the specified second unit, and when receiving the transfer, the first block captures jump to the specified second block.

15. The method according to p. 14, characterized in that for the purpose of scanning the first block is continuously pumped by the frequency in the entire RF band transmission, and a radio frequency transmit channel scans by number of frames is at least equal to the number of radio frequency transmission channels of the system radios the ligature, such as a portable or mobile unit (6, 7) radio, and the specified second block radio is a block (2) access to radio communication systems, which includes a set of remote units (6, 7) radio.

17. Radio system, which includes a set of blocks (2) access to radio and multiple remote units (6, 7) radio, and each block (2) access to radio provides service radio in a limited geographical area, or cell, characterized in that the blocks (2) access to radio and these blocks (6, 7) radio designed to provide communication in accordance with the method according to any of paragraphs. 1-16.

18. Radio system on p. 17, characterized in that the blocks (2) access to radio transmit in a shared radio frequency band transmission, and the sequence of leaps of radio frequency transmission channel is specific to block (2) access to radio.

19. Radio system under item 17 or 18, characterized in that it has a capability to provide radio communication in industrial, scientific and medical (ISM) band of frequencies from 2400 to 2483.5 MHz, including 79 radio frequency transmission channels, each channel has on the specified radio channel and every mdvr frame includes first (TX) and second half (RX), each of which has 12 consecutive time intervals in accordance with a communication scheme MDR/JEM.

20. Block (2) access to radio communication systems for wireless communications, comprising means (8) and transmit-receive means (3) controls are designed to provide communication in accordance with one of the preceding paragraphs.

21. Block (6, 7) radio communication systems for wireless communications, comprising means (8) and transmit-receive control, made with the possibility of radio communication in accordance with any of paragraphs. 1-19.

 

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FIELD: radio communications.

SUBSTANCE: proposed method intended for single-ended radio communications between mobile objects whose routes have common initial center involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile object, these intermediate transceiving drop stations being produced in advance on mentioned mobile objects and destroyed upon completion of radio communications. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning of several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

1 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer from mobile object to stationary one residing at initial center of common mobile-object route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile object, these intermediate transceiving drop stations being produced in advance on mobile object. Proposed radio communication system is characterized in reduced space requirement which enhanced its effectiveness in joint functioning with several other radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 6 dwg

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile object from stationary one residing at initial center of mobile-object route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile object, these intermediate transceiving drop stations being produced in advance on mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several other radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 6 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method for single-ended radio communications between mobile objects whose routes have common initial center involves use of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile objects. Proposed radio communication system is characterized in reduced space requirement and, consequently, in enhanced effectiveness when operating simultaneously with several other radio communication systems.

EFFECT: reduced mass and size, enhanced noise immunity and electromagnetic safety for attending personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in simultaneous functioning of several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object, these intermediate transceiving drop stations being produced in advance on first mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several other radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method for single-ended radio communications between mobile objects having common initial center involves use of low-power intermediate transceiver stations equipped with non-directional antennas and dropped from mobile objects. Proposed radio communication system is characterized in reduced space requirement and, consequently, in enhanced effectiveness when operating simultaneously with several other radio communication systems.

EFFECT: reduced mass and size, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object, these intermediate transceiving drop stations being produced in advance on first mobile object and destroyed upon completion of radio communications between mobile and stationary objects. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications engineering; digital communications in computer-aided ground-to-air data exchange systems.

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EFFECT: enhanced efficiency due to enhanced throughput capacity of system.

1 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

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