Selection method and system of optimal service sector within multiple-key access data transmission system with code channel division

FIELD: information technologies.

SUBSTANCE: in discovered preferred version of implementation the signal levels of access terminal active sectors is compared to signal level of current service sector of this access terminal, summed to accumulate delta credits. If control lock bit of data transfer rate "УСПД" is available, cumulative total credit is authorised to receive authorised cumulative total credit.

EFFECT: new service sector is identified from collection of candidate sectors on the basis of signal levels of active sectors and authorised cumulative total credits.

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The technical field to which the invention relates,

The invention relates to wireless communication systems, and more particularly to a method and system for diversity transmission site selection (CWU, SSTD) in MDCRC system data.

Prior art

The current generation cellular telephone systems provides more services, for example, data services than the systems of previous generations. Cellular communication systems of the first and second generation in the typical case used mainly for voice communication services. In systems of the second generation began the introduction of restricted data services, albeit with low data rates. Systems of the third generation, such as multiple access, code-division multiplexing (MDCRC, CDMA), high speed data SPD, HDR)offer integrated information capabilities at much higher speeds than the speed of data transfer in systems of the second generation, and is able to provide services such as the provision of streaming audio and video.

The network consists of numerous geographical cell, each of which can contain numerous sectors. Inside each cell there is a base station. The user is tel typically communicates with the network through the sector, which provides the best signal. When a mobile user changes its location, the user can communicate with the network through another sector that provides the most reliable signal. How relay transmission service in MDCRC-communication systems of the second generation are known in the art. However MDCRC-data transmission systems, such as MDCRC-SPD systems create new problems when the mobile station selects a new sector.

One such problem occurs when the user switches between sectors too quickly. In a normal cell MDCRC system data stream, which includes voice information is sent in each sector, engaged in active communication with the mobile station, possibly by using multiple base stations. Therefore, all active sectors that can communicate with the mobile station, send the stream data to that mobile station. The redundancy of the data stream was necessary in order to meet the requirements on low latency voice data when the relay transmission service. This restriction is relaxed in the data network.

In the packet data network users can tolerate a short delay in data transmission. Because a short delay is no longer limited is Iconium, imposed on the system, you can better achieve reliability through retransmission, and not redundant transmission through active sector all the time according to the scenario of a relay transmission service. Thus, in a conventional cellular system, high-speed packet data flow data, as a rule, is directed through one sector that maximizes the throughput of a straight line. To achieve this routing, the mobile object controls all active sector, among which the user selects the best and informs the network of his choice. In such a system, the dynamics of the channels is used to maximize throughput. The choice of the transmitter for use by the local peaks in the shading process is carried out in the form of explode when choosing. Thus, the choice of the best of the service sector is also referred to as diversity transmission site selection (CVU).

In Fig. 1 depicts a typical MDCRC-system data, such as MDCRC-SPD system. The network 100 contains access multiple access points, which shows only the points 110 and 130 access. Mobile station, such as the terminal 114 access, communicates with an access point, such as point 110 access to connect to the network 100 access. In General, an access point, such as point 110 to blunt, will have several sectors, such as sector 116, 118 and 120.

Since the terminal 114 of access in the General case communicates with one sector at some point in time, data terminal 114 of the access point 110 access should be addressed in a specific sector with which the terminal 114 provides access link.

However, the problem arises when the access terminal is constantly switches between sectors. Suppose that sector 116 is having the greatest level signal straight line at one point, so that the terminal 114 selects a sector 116 as the current of the service sector. In the next moment, sector 132 point 130 has access with the highest level of the direct signal line. And let a few moments later, the sector 116 again has a direct line of communication, which is the signal having the highest level. It is likely that in such a situation can happen fast switching between two or more sectors. Each time a switch occurs, the data that was supposed to send to the terminal 114 of access, should be sent to the appropriate queue data for this sector. In addition, the user will not be able to accept data before the data queue is ready. Such rapid transitions can cause significant network congestion and Perera is s communication to the user.

The second problem when choosing the best sector is associated with the reliability of the reverse link. On a return line connection terminal 114 may send to the network feedback information about the state of the channels in order to help the network achieve the highest possible throughput straight line. In the system of high-speed data network terminal 114 access transmits the control signal data rate (USPD, DRC), designed to control the data transmission speed in a straight line. The terminal 114 also sends a signal receiving acknowledgement (ACK) in the service sector, when successfully accepted the packet. The terminal 114 access must choose a new sector that has a reliable connection of the return line connection terminal 114 access. Otherwise, information USPD and the ACK may be lost, which reduces system throughput. However, the terminal 114 access hard to find information about the reliability of connection of the return line. If the terminal 114 selects the sector with weak reverse link, the bandwidth may suffer due to re-transmission.

In the ideal case, the terminal 114 access must choose a new sector to maximize throughput in a straight line. First, the choice of the site should contribute before the tradenew fast periodic switching. Secondly, the site selection should include the impact of the reliability of the return line on the throughput of the direct line of communication. Thus, a need exists for methods and systems for appropriate choice of the best of the service sector in MDCRC-based system.

Summary of the invention

Specific options for the implementation discussed in this description, is dedicated to satisfying the foregoing needs by using the hysteresis signal and temporal hysteresis, and use of information about the reliability of reverse lines of communication with the rate control data (reverse RTU-line communication) when passing the transfer site selection in MDCRC system data.

Considered in this description of specific embodiments of oriented method and system for diversity transmission site selection in MDCRC system data. In accordance with one aspect of the present invention, the signal levels of the active sectors of the access terminal is compared with the signal level of the current service sector of the access terminal. Then using hysteresis level signal is summed with the accumulation of Delta-loans. If there is information about the reliability of the return line connection authorize the accumulated Delta-credit is for the formation of the authorized total accumulated credit. After all this, identify the best sector of the aggregate sectors of the candidates on the basis of the signal levels of the active sectors and sanctioned total accumulated credits.

List of figures

Fig. 1 - possible network access MDCRC-data system that contains the access terminal and the access point.

Fig. 2 - the procedure of selecting the best of the service sector.

Fig. 3 - possible the comparison of the signal levels of the active sector and the current service sector.

Fig. 4 - possible procedure summation with the accumulation of Delta-loans using the hysteresis level of the signal.

Fig. 5 - procedure for sanctioning loans.

Fig. 6 - possible identification of the best of the service sector.

Fig. 7 - the procedure of selecting the best of the service sector using bits power control return line connection (UMAS RPC).

Fig. 8A-8B is possible for the system to select the best of the service sector.

Detailed description

Described in this description of specific embodiments of dedicated method and system for diversity transmission site selection in MDCRC system data. The following description contains specific information relating to the implementation of this is part II of the invention. Specialist in the art will understand that the present invention can be implemented not as specifically discussed in this application. In addition, some of the specific details of the invention are not considered, in order not to complicate the perception of the invention. Specific details not described in this application are within the ordinary knowledge of a person skilled in the technical field.

The drawings in this application and accompanying detailed description dedicated just possible specific variants of embodiment of the invention. For brevity, other specific embodiments of which use the principles of the present invention, does not reflect the specific description and not illustrated in specific drawings in this application. The word "possible" is used in this description solely in the sense of "serving as an example, option, or employee for illustration". Any particular implementation, which in this description is spoken of as "possible", not necessarily having a preference over other specific options exercise or advantage over them.

In Fig. 2 depicts one particular embodiment of the invention. Let the example of this particular embodiment of the invention operates in MDCRC-sist the IU connection. General principles MDCRC-communication systems and, in particular, the General principles of generating signals with spread spectrum for transmission over a communication channel is described in U.S. patent No. 4901307 entitled "SPREAD SPECTRUM MULTIPLE ACCESS COMMUNICATION SYSTEM USING SATELLITE OR TERRESTRIAL REPEATERS", assigned to the owner of the rights to the present invention. The description of this patent, i.e. of U.S. patent No. 4901307 in full is incorporated into the present application by reference. Furthermore, in U.S. patent No. 5103459 entitled "System and Method for Generating Signal Waveforms in a CDMA Cellular Telephone System", assigned to the owner of the rights in the present invention, described the principles associated with pseudotumour (PN, PN) expansion pack, masking by Walsh, and methods of forming the signals spread spectrum communications, the relevant MDCRC. The description of this patent, i.e. of U.S. patent No. 5103459 fully incorporated into the present application by reference. In addition, the present invention uses temporal multiplexing of data and various principles related to communication systems with high data rate", and the present invention can be used in communication systems with high data rate"described in application for U.S. patent entitled "Method and Apparatus for High Rate Packet Data Transmission" c serial No. 08/963386, filed November 3, 1987 and assigned the possession is Ely rights to the present invention. The description of this patent application is also fully incorporated into the present application by reference.

Procedure 200 may work in software, for example, in the terminal 114 of the access and/or point 110 access. Procedure 200 includes the steps of determining the best of the service sector, designed to explode transfer site selection for terminal 114 access. During operation MDCRC-SPD system procedure 200 is called once for each slot (elementary time interval multiplexing channel allocated for transmission) WSPD when the terminal 114 of the access is in the connected state, i.e. communicates with the network 100 access. The procedure begins at step 202 and proceeds to the next step. At step 204, the terminal 114 of the access measures the signal level of the straight line from each sector in the active set pilot signal terminal 114 access, also called active sectors. In addition, at step 204, the measured signal level is a straight line for the current service sector.

In MDCRC-data transmission systems, such as MDCRC-SPD system, the access terminal can receive the data stream during transmission in a straight line in either variable speed transmission of data or constant data transfer rate. Usually, when passing through a return line connection is reliable, the La terminal 114 of the preferred access data reception, transferred from another access terminal, using mutable data transmission speeds. Otherwise, when passing through a return line connection is unreliable, i.e. when the channel RTU unreliable for the sector with the highest level of signal a straight line, you can use the constant data transfer rate. Mode constant speed data terminal 114 access receives a stream of data with a low but constant rate data for use in multiple slots. In one specific embodiment, the invention allows to determine the signal levels and mode variable data rate, and mode constant data transfer rate. At a later stage, you can choose the mode variable data rate mode or a constant rate of transmission data when the sector is already selected. Step 204 is described in greater detail in Fig. 3.

At step 206, the terminal 114 of access determines the difference between the signal levels of the straight line connection from the active sectors and levels of the signals a straight line from the current sector of the service, and then performs the summation of accumulation (cumulative) differences for each slot to form the accumulated total of the loan. Step 206 is described in greater detail in Fig. 4.

On atape procedure enables the determination of adopted new group lock bits RTU. If the new group lock bits RTU accepted, the procedure proceeds go to step 210. Otherwise, the procedure continues with the transition to the end of the procedure at step 214.

At step 210, the procedure 200 provides authorization accumulated total credits on the basis of the lock bits RTU current service sector and active sectors. Since the lock bits RTU serve as an indication, is it a reliable back line sectors, these bits lock RTU is used primarily for sanctioning loans to sectors with a solid back line, and exclude loans sector with unreliable feedback line. After step 210, the procedure proceeds go to step 212. Step 210 is described in greater detail in Fig. 5.

At step 212, the procedure 200 provides the use of authorized total accumulated credits from step 210 to identify the best of the service sector. Step 212 is described in greater detail in Fig. 6.

Procedure 300 shown in Fig. 3, gives an expanded view about the evaluation phase of the signal levels corresponding to the procedure 200, namely about the stage 204. Procedure 300 is called once per slot and is used to estimate signal levels of the active sectors. The procedure 300 begins at EB the PE 302. At step 304, the procedure provides updated estimates of the levels of the pilot signals in the active sectors. Then, the procedure 300 provides the definition of signal level mode variable data rate and signal level mode constant data transfer rate. The signal level mode variable data rate and signal level mode constant data rate is calculated for each active sector. Assessment as level signals in the mode variable data rate and signal levels in the mode of constant data transfer rate can be determined using a single-pole filter with infinite impulse response (single-pole IIR filter).

As mentioned above, the actual data rate mode constant data transfer rate, also called the adjusted signal level mode, a constant data rate, generally set lower than the data rate indicated by the signal level mode constant rate data determined at step 304. To set the corrected signal level mode constant data rate less than the signal level mode, a constant rate of data transmission, at step 306 subtract the amount of displacement energy in dB is (dB) of the signal in the mode of constant data transfer rate. In one specific embodiment, the amount of displacement energy is 6 dB. This correction signal in the mode of constant data transfer rate, i.e. the determination of the adjusted signal level mode, a constant rate of data transmission is carried out for all active sectors.

After step 306, the procedure 300 provides the beginning of a series of comparisons between the signal level of the current service sector and the signal level of all other active sectors. During each comparison, the levels of the signals in the mode variable data rate mode constant data transfer rate of the current service sector compared with the levels of the signals in the mode variable data rate mode constant data rate of some active sector.

At step 308, the procedure calculates the difference between the signal level mode variable data rate of the current service sector and the level of the signal in the mode variable data rate of the active sector. This difference is set as the difference Raznie (DiffVV). Separate Raznie retain for each comparison with other active sector. The procedure continues the transition to step 310.

At step 310, the procedure calculates the difference between the corrected what level signal in the mode of constant data transfer rate of the current service sector and the level of the signal in the mode variable data transfer speeds some active sector. This difference is set as the difference between Razni (DiffFV). Separate Razni retain for each comparison with other active sector. The procedure continues the transition to step 312.

At step 312, the procedure calculates the difference between the signal level mode variable data rate of the current service sector and the adjusted signal level mode constant data rate of some active sector. This difference is set as the difference between Raskin (DiffVF). Separate Raskin retain for each comparison with other active sector. The procedure continues the transition to step 314.

At step 314, the procedure calculates the difference between the equalized signal level mode constant data transfer rate of the current service sector and the adjusted signal level mode constant data rate of some active sector. This difference is set as the difference Rannnn (DiffFF). Separate Rannnn retain for each comparison with other active sector. The procedure ends at the end of the procedure at step 316.

Thus, it is possible to understand that each value Raznih, i.e. Rsnn, Rasni, Raskin and Raznie defined in procedure 300, reflects the difference in signal level between the current service sector and some the m active sector. As an example, note that Razni reflects the difference of signal levels between the current service sector in the mode of constant data rate and some active sector in the mode variable speed transmission of data.

The procedure 400 shown in Fig. 4 gives an enlarged view about the phase of the summation with the accumulation of credits corresponding to the procedure 200, namely about the stage 206. Procedure 400 is called once for each slot. Procedure 400 provides a summation with the accumulation of differences shown in Fig. 3, in accordance with the hysteresis signal. In the process of applying hysteresis level signal to the differences each difference - Raznie, Rasni, Raskin and Runnnn is compared with two threshold values. For example, in this particular embodiment, if the difference is less than -3 dB, the corresponding Delta-credit receives a positive increment or "accumulate", and if this difference exceeds 0 dB, the corresponding Delta-credit receives a negative increment. The hysteresis level of the signal ensures that for selecting the best of the service sector will be identified only active sector with high signal levels.

The procedure 400 starts at step 402. At step 406, the procedure 400 provides the definition of less whether Raznie, than -3 dB. If Raznie less than -3 dB, the procedure 400 continues with a transition to step 408. Otherwise, the procedure 400 continues with a transition to step 412. At step 408, the procedure 400 provides a positive increment of DeltaCredit (DeltaCreditVV) per unit and continues the transition to step 416.

At step 412, the procedure 400 provides for determining whether more Raznie than 0 dB. If Raznie greater than 0 dB, then the procedure 400 continues with a transition to step 414. Otherwise, the procedure 400 continues with a transition to step 416. At step 414, the procedure 400 provides a negative increment of DeltaCredit per unit and continues the transition to step 416.

At step 416, the procedure 400 provides the definition, less if Raskin than -3 dB. If Raskin less than -3 dB, the procedure 400 continues with a transition to step 418. Otherwise, the procedure 400 continues with a transition to step 420. At step 418, the procedure 400 provides a positive increment DeltaCredit (DeltaCreditVF) per unit and continues the transition to step 424.

At step 420, the procedure 400 provides for determining whether more of Raskin than 0 dB. If Raskin greater than 0 dB, then the procedure 400 continues with a transition to step 422. Otherwise, the procedure 400 continues with a transition to step 424. At step 422, the procedure 400 provides a negative increment DeltaCredit per unit and prodoljaetsa transition to step 424.

At step 424, the procedure 400 provides the less I Razni than -3 dB. If Razni less than -3 dB, the procedure 400 continues with a transition to step 426. Otherwise, the procedure 400 continues with a transition to step 428. At step 426, the procedure 400 provides a positive increment of DeltaCredit (DeltaCreditFV) per unit and continues the transition to step 432.

At step 428, the procedure 400 provides for determining whether more of Rasni than 0 dB. If Razni greater than 0 dB, then the procedure 400 continues with a transition to step 430. Otherwise, the procedure 400 continues with a transition to step 432. At step 430, the procedure 400 provides a negative increment of DeltaCredit per unit and continues the transition to step 432.

At step 432, the procedure 400 provides the definition, less if Rannnn than -3 dB. If Rannnn less than -3 dB, the procedure 400 continues with a transition to step 434. Otherwise, the procedure 400 continues with a transition to step 436. At step 434, the procedure 400 provides a positive increment DeltaCredit (DeltaCreditFF) per unit and continues the transition to step 440.

At step 436, the procedure 400 provides for determining whether more Rannnn than 0 dB. If Rannnn greater than 0 dB, then the procedure 400 continues with a transition to step 438. Otherwise, the procedure 400 continues with a transition to step 440. At step 438 the% is ur 400 provides a negative increment DeltaCredit per unit and continues the transition to step 440. At step 440, the procedure 400 ends.

The procedure 500 shown in Fig. 5, gives an expanded view about the stage of validation, the appropriate procedure 200, namely about the stage 210. The procedure 500 performed after the Delta-credits accumulated for L slots, and in one particular embodiment, the value of L is set equal to 64. The procedure 500 provides authorization differences, i.e. Raznie, Rasni, Raskin and Runnnn obtained during the execution of procedure 400. The procedure 500 provides authorization Delta-loans for each sector based on the received information about the reliability of the reverse communication lines for all active sectors. Authorizing the Delta credit can be implemented by adding the appropriate value to the accumulated total credits or subtracting from them the above variables.

The procedure 500 starts at step 502. At step 504, the procedure 500 provides the reliable if the reverse link of the current service sector. The reverse link of the current service sector is reliable if the lock bit for the current RTU service sector is equal to "1". If the lock bit for the current RTU service sector is equal to "1", then the procedure 500 continues with a transition to step 506. Otherwise, the procedure 500 continues with a transition to step 512.

On stage ABR 500 provides the is it a reliable reverse link sector j, i.e. equal to "1" lock bit RTU for sector j. If the lock bit RTU for sector j is equal to "1", then the procedure 500 continues with a transition to step 508. Otherwise, the procedure 500 continues with a transition to step 510. At step 508, because it has detected a sector j has a reliable back line, all authorised Delta-credits accumulated for sector j. In other words, all the Delta loans that had accumulated earlier in the procedure 400 for sector j in the assumption that sector j has a reliable back line, now resolved (i.e. authorized), because the lock bit RTU for sector j in fact confirms the above assumption. Thus, at step 508 authorised all values of DeltaCredit, DeltaCredit, DeltaCredit and DeltaCredit for sector j.

If instead, at step 506 determines that the reverse link for sector j is unreliable, i.e. that lock bit RTU for sector j is equal to "0", the procedure 500 continues with a transition to step 510. At step 510 only enforce DeltaCredit and DeltaCredit and DeltaCredit, DeltaCredit rejects, i.e. they do not approve.

If step 504 determines that the reverse link of the current service sector is unreliable, then the process 500 moves to step 51. At step 512, the procedure 500 provides the definition, is it a reliable reverse link active sector j, i.e. equal to "1" lock bit RTU sector j. If the lock bit RTU sector j is equal to "1", then the procedure 500 continues with a transition to step 514. Otherwise, the procedure 500 continues with a transition to step 516. At step 514, since the current service sector is unreliable reverse communication line, and the sector j has a reliable back line, order Delta-credits accumulated for sector j. All loans, i.e. DeltaCredit, DeltaCredit, DeltaCredit and DeltaCredit can be sanctioned, as the lock bit RTU confirms the assumption that sector j has a reliable line of communication.

At step 516, as the current service sector and the sector j are both unreliable, only enforce DeltaCredit, DeltaCredit and DeltaCredit. All values of DeltaCredit for sector j is rejected.

Immediately after sanction or reject the Delta credits at stage 508, 510, 514 or 516 procedure 500 continues with a transition to step 518. At step 518 the loans sanctioned for sector j at the previous stage, i.e. at one stage 508, 510, 514 or 516, tabularum to generate values Creditn, Kreditni, Creditin and Kreditai for sector j. It should be noted that any knowledge of the events Creditn, Kreditni, Creditin and Kreditai, cabuliwallah at step 518, shown in the drawing generalized designation Credith. Then, the procedure 500 sanctioning accumulated Delta-loans ends at step 520.

The procedure 600, shown in Fig. 6, gives an expanded view about the stage of identification, the appropriate procedure 200, namely about the stage 212. The procedure 600 provides the best choice of the service sector on the basis of sanctioned accumulated credits from stage 210, which is explained above in connection with Fig. 5.

The procedure 600 starts at step 602. At step 604 credits, i.e. the values Credith accumulated and authorized to sector candidate, i.e. sector j from the active group, compared with some threshold value. This threshold value may be set to, for example, 64. If Credith sector candidate is greater than a threshold, then the procedure 600 continues with a transition to step 606, which is Blahhh (FlagXX) set equal to "1". Otherwise, the procedure 600 continues with a transition to step 608, where the value Flashh set equal to "0". Thus, the value Flashh shows whether tabulated loans for the sector candidate when compared with the current service sector large enough to support the switching of the current is the sector service sector candidate. As an example, note that if Plagne sector candidate exceeds the threshold value, this fact can be interpreted as meaning that the sector-candidate mode variable data rate would be a better choice than the current service sector in the mode of constant data transfer rate. On the other hand, if Plagne does not exceed the threshold value, this fact can be interpreted as meaning that the current sector service mode constant data transfer rate would be a better choice than sector-candidate mode, variable baud rate. Steps 604, 606 and 608 are repeated for all sectors of the candidate and for each change values Credith, i.e. Creditn, Kreditni, Creditin and Kreditai to form groups of values Flinn, Plagne, Plugin and Flagey for each sector candidate.

At step 610 carry out the correction of the average signal in the mode variable speed transmission of data for sectors of the candidates on the basis of the approved lock bits RTU. As discussed above, the lock bits RTU serve as an indicator of the reliability and quality of the reverse link, but they are not transmitted continuously sectors by candidates for the active set. On the contrary, the lock bits RTU transmitted only intermittently, for example, every 64 slots. Immediately after the x receiving the lock bits RTU can be used to determine the actual signal level for sector-candidate mode variable data rate. The corrected signal level mode variable data rate (Adesman, AdjVAR) can be determined by subtracting a value based on the bits of the lock RTU, average variable data rate defined earlier in the assumption that the reverse link is reliable. Stage 610 is conducted once for each sector in the active set of sectors. In other words, the corrected signal level mode variable speed transmission of data Adesman determine for each sector candidate.

Immediately after you determine four values Flashh and Adesman for each sector a candidate at the above stages, the procedure 600 continues with a transition to step 612. At step 612 combine values Flagey and Adesman sector candidate to form a single integer value sorting key parameter 1 mode variable data rate (SKRIP, SortKeyVariable1). For example, if the value of Flagey sector candidate is equal to "x"and the value of Adesman sector candidate is equal to "y", then the value SKRIP must be equal to the "Hu". In the same way determine the value of the sorting key parameter 2 mode variable data rate (SKRIP), combining the values of Plagne and Adesman, and the screening value of the key parameter 1 re the ima constant data transfer rate (SKMS) determine combining values Plugin and adjusted constant data rate for the sector candidate, and the value of the sorting key parameter 2 modes constant data transfer rate (SKMS) is determined by combining the values Flinn and adjusted constant data rate for the sector candidate. Thus, for each sector of the candidate in the active group at step 612 form of sorting values of key parameters, namely, SKRIP, SKRIP, SKRS and SKMS.

These four values sorting key parameters for sectors in the candidate identified in step 612, represent the relative improvement that can be expected when carrying out switching from the current sector services in one sector-candidate compared to other sector candidate. For example, if the value SKRIP to the first sector of a candidate more than the value SKRIP for the second sector candidate, we can conclude that when the current sector service mode variable data rate switching in the first sector-candidate mode variable data rate would be a better switch than the switch in the second sector-candidate mode, variable baud rate. As another example, note that e is either a value SKMS to the first sector of a candidate less what is SKMS for the second sector candidate, we can conclude that when switching from the current sector service mode constant data rate in the second sector-candidate mode a constant rate of data transmission would be a better choice than switching in the first sector of the candidate in the mode of constant data transfer rate.

After defining the four values of the sort key parameters for each of the sectors of the candidates on the stage 612, the procedure 600 continues with a transition to step 614. At step 614 identify the highest value of the sorting key parameter for switch mode variable data rate and the highest value of the sorting key parameter for switch mode constant data transfer rate. The highest value of the sorting key parameter serves as an indicator switch for both modes - variable and constant data transfer rate, which will provide the highest transmission quality and the highest speed. Thus, to identify the highest value of the sorting key parameter for the switch variable speed transmission of data, compare with each other the values SKRIP and SKRIP all sectors of the candidates. Is SKRIP or SKRIP, they are the abuser highest value in all sectors, identify as the greatest sorting key parameter mode variable data rate (SKRIP, HighestSortKeyVariable). Similarly, to identify the largest sorting key parameter mode variable data rate (NSPCS, HighestSortKeyFixed) compare with each other the values SKMS and SKMS all sectors of the candidates.

Then, the procedure 600 continues with a transition to step 616, which is SKRIP compare with the value NSPCS. The value, which is large, determines the preferred mode, i.e. the better the service sector. For example, if the value of SKRIP more than the value NSPCS, the preferred mode would be the mode variable speed transmission of data and the best service sector was the sector with SKRIP. Then, the procedure 600 ends at step 620.

In an alternative embodiment, the procedure 200, illustrated in Fig. 2, can provide the reliability determination return line connection without the use of lock bits RTU. In the implementation of a possible procedure 700, illustrated in Fig. 7, to determine the reliability of the return line instead of the lock bits RTU use the bits of the power control return line connection (UNOLS). The procedure 700 includes several who are procedures, you can find the procedure 200. The procedure 700 starts at step 702. Step 704 is identical to the step 204, the procedure 200. Recall that the details of step 204 were presented in the procedure 300. Thus, the procedure 300 is a detailed reflection of the work and on stage 704.

At step 706, the procedure 700 provides filtering bits of UNOLS active sector, to determine the reliability of the corresponding reverse link. Bits of UNOLS you can filter using a single-pole IIR filter, to determine the value of the mathematical expectation or mean value. If the average value of the bits of UNOLS sector exceeds a certain threshold value, it is possible to conclude that this sector has a reliable back line. Otherwise, this sector is unreliable reverse communication line.

In the General case, the active sector transmit bits of UNOLS continuously in contrast to the transmission breaks, one for L slots - if lock bits RTU. Because the reliability of the return line can be determined on the basis of the bits of UNOLS, then the procedure does not need to wait L slots to authorize the accumulated Delta-credits. Instead, the procedure 700 may provide the best choice of the service sector, when the accumulated Delta-credit exceeds some threshold level of C is Nala, as well as some threshold duration value.

In addition, at step 706, the procedure 700 reduce the levels of signals in modes variable speed and constant data transfer rate for each active sector. The reduction is conducted in relation to the level of the signal in the mode variable data rate, if the average value or the value of the mathematical expectation of UNOLS less than some threshold. Otherwise, the reduction is not carried out. The possible reduction of the signal level mode variable data rate can be 20 dB. The reduction is also carried out in relation to the level of the signal in the mode of constant data transfer rate, to ensure a lower data rate mode constant data transfer rate. The possible reduction of the signal level mode, a constant rate of data transmission can be 6 dB.

Next, note that step 708 procedure 700 is similar to step 206, the procedure 200. At step 708 is the sum of accumulation of Delta-loans in accordance with the procedure 400 for receiving the accumulated total loans. At step 708 is no need to authorize the accumulated total loans because the approval of loans, and access was provided at step 706. At step 710, the procedure 700 provides broken is the situation of the new best of the service sector in accordance with the procedure 600, the procedure 700 replaces the accumulated total loans sanctioned accumulated total credits obtained in accordance with the procedure 600. After carrying out step 710, the procedure 700 ends at step 712.

The system 800 shown in Fig. 8A shows a possible procedure 200 in the form of a block diagram of the system. Level signal 802 sector j and the level 804 signal of the current service sector serves as an input signal in block 806 evaluation of signal levels. Block 806 estimates of the levels of signals subtracts the offset value from the signal level in the mode of constant data transfer rate of the current sector and service sectors in the active set, to form a corrected signal levels in the mode of constant data rate for all sectors. Then block 806 valuation issues the level of the signal that is measured, i.e. the levels 808 signals, in block 810 comparison of signal levels. Block 810 comparison determines the difference 812, i.e. Raznie, Rasni, Raskin and Rsnn, in accordance with the procedure 300. These differences 812 are given as input signals in the accumulating adder 814. Accumulating adder 814 provides the use of hysteresis during summation stacked in accordance with the procedure 400. Accumulating adder 814 outputs the accumulated total credits Deltar is ditii, DeltaCredit, DeltaCredit and DeltaCredit in module 820 sanctioning loans. In module 820 sanctioned loans also serves as an input bit signals 816 lock RTU current service sector and bits 818 lock RTU sector j. After applying preferences and authorization to accumulated total credits in accordance with the procedure 500 module 820 sanctioning loans gives authorized accumulated total credits 822 in module 824 identify the new sector. Module 824 identify the new sector chooses the highest level among the set of sectors of candidates in accordance with the procedure 600. The set of sectors-candidates formed active sectors and arranged in accordance with the procedures 500 and 600. Module 824 identify the new sector produces a signal 826 new service sector and the signal 828 transfer mode. The signal 828 transfer mode specifies the transfer mode of the new sector, i.e. constant or variable data rate.

System 850, shown in Fig. 8b shows a procedure 700 in the form of a block diagram of the system. Level 852 signal of sector j and the level 854 signal of the current service sector serves as an input signal in block 856 evaluation of signal levels. Evaluation 858 signal levels and bits 862 UNOLS active is Ktorov serves as input signals to the filter 860 UNOLS. If the value of the mathematical expectation of UNOLS exceeds some threshold value, the signal level mode variable speed transmission reduced, in accordance with step 706, the procedure 700. Otherwise, the reduction is not carried out. Filter 860 UNOLS issues corrected levels 806 signals in block 866 comparison and module 874 identify the new sector. Block 866 comparison determines the difference 868, i.e. Raznie, Rasni, Raskin and Rsnn, in accordance with the procedure 300. These differences 868 given as input signals in the accumulating adder 870. Accumulating adder 870 provides the use of hysteresis during summation stacked in accordance with the procedure 400. Accumulating adder 870 outputs the accumulated total credits 872, i.e. DeltaCredit, DeltaCredit, DeltaCredit and DeltaCredit, module 874 identify the new sector. Module 874 identify the new sector selects the sector with the highest sorting key parameter among the set of sectors of candidates in accordance with the procedure 600. Module 874 identify the new sector produces a signal 876 best of the service sector and the signal 878 transfer mode. The signal 878 transfer mode specifies the transfer mode of the new service sector, i.e. constant or variable data rate.

Enter the specified procedures and flowcharts systems help to overcome the shortcomings, as discussed previously. The above procedures and flowcharts systems allow to obtain an estimate of the reliability of the return line as a result of taking lock bits RTU. In an alternative embodiment, the above procedures and flowcharts systems determine the value of the mathematical expectation or mean value of UNOLS to assess the reliability of the reverse link. In addition, through the use of hysteresis signal level and time hysteresis time mentioned procedures and flowcharts systems will eliminate the problem of rapid periodic switching. Thus, due to the above features of the present invention allows to obtain a method and system for selecting the best of the service sector to explode transmission and site selection in MDCRC system data. Experts in the art would understand that information and signals may be represented using any of a variety of technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips (symbols psevdochumoy sequence), referred to throughout the text of the previous description can be represented in the form of voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

Experts in the art also will understand that the various illustrated logical blocks, modules, circuits, and steps of the algorithms described in connection with specific implementation options discussed above may be implemented as electronic hardware, computer software, or combinations thereof. To clearly illustrate this interchangeability of software and hardware, various illustrative components, blocks, modules, circuits, and steps described above in General terms and using the terminology describing their functionality. The implementation of this functionality in the form of hardware or software depends upon the particular application and design constraints imposed on the entire system. Specialists in the art will be able to implement the above functionality in different ways for each particular application, but such solutions should not be interpreted as beyond the scope of claims of the present invention.

The various illustrative logical blocks, modules, and circuits described in connection with specific implementation options discussed above may be implemented or embodied with the of processor General purpose digital signal processor (DSP, DSP), a specialized integrated circuit (ASIC), programmable gate array (FPGA) or other programmable logic device, discrete means logic gate and transistor logic, discrete hardware components, or any combination of all these tools, designed to perform the functions referred to in this description. General-purpose processor may be a microprocessor, but in an alternative embodiment, such a processor may be a conventional processor, controller, microcontroller, or state machine. The processor can also be implemented as a combination of computing devices, for example, a combination of a digital signal processor (DSP) and microprocessor, multiple microprocessors or one or more microprocessors in conjunction with a DSP core, or to exercise any other configuration such funds.

The stages of a method or algorithm described in connection with the implementation discussed above, may be embodied directly in hardware, the software executed by the processor, or combinations thereof. Software module, which in this application is also called a computer program, may not contain what AutoRAE the number of segments of the source code or object code and can be stored on any machine-readable media, for example, in random access memory device (RAM, RAM), flash memory, permanent memory device (RAM, ROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, removable disk, CD-ROM, DVD-ROM, or on a machine-readable storage medium of any other type known in the art. Possible machine-readable storage media can be connected to the processor, and the processor can read information from the machine-readable storage medium and to record information on machine-readable media. In an alternative embodiment, the computer-readable storage medium may be embedded in the processor. Processor and computer-readable media can be in the ASIC. ASIC may reside in a mobile station, the base transceiver station or satellite relay. In an alternative embodiment, the processor and computer-readable storage medium may reside as discrete components in a user terminal.

The preceding description of the proposed embodiments are given to the specialist in the art could recreate or use the present invention. Specialists in the art will easily understand that in these embodiments of you unest the various changes, and that the General principles set forth in this description are applicable to other variants of implementation within the scope and essence of this invention. Thus, one should not consider the invention limited to the specific implementation options described above, and it should be seen in its widest extent, is caused by the principles and new features described in this specification.

1. The access terminal to select the best of the service sector in the data transmission system multiple access code division multiple access (CDMA), containing means for subtracting the offset value from the signal level in the mode of constant data transfer rate of the current service sector for the formation of the corrected signal level mode constant data rate for all sectors, means for determining the difference between the many levels of the signals received from the set of active sectors, and the signal level of the current service sector, means for receiving the corrected signal levels to determine the difference, means for applying hysteresis during summation with the accumulation and providing the accumulated total credits module sanctioning of loans, a means of identification of a new sector for receiving the accumulated total cred the Tobit and selection of the sectors with the largest sorting key parameter among the set of sectors of the candidates.

2. The access terminal according to claim 1, further containing a means of identifying the best sector to provide output data with respect to the best of the service sector and mode of transmission.

3. The access terminal according to claim 2, in which the transmission mode identifies the transmission mode the best of the service sector as a mode constant or variable data rate.

4. The access terminal according to claim 1, further containing a means for assessment, whether surpasses the average value corresponding to the power control return line connection (UNOLS), threshold value, and determining whether to apply subtraction in relation to the level of the signal in the mode variable speed transmission of data.



 

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FIELD: information technology.

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9 cl, 3 dwg

FIELD: information technology.

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44 cl, 11 dwg, 6 tbl

FIELD: physics, communication.

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27 cl, 6 dwg

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38 cl, 5 dwg

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21 cl, 4 dwg

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34 cl, 9 dwg

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4 cl, 13 dwg, 2 tbl

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22 cl, 3 dwg, 4 tbl

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19 cl, 5 dwg

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14 cl, 4 dwg

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2 cl, 5 dwg, 1 tbl

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

5 cl, 22 dwg, 1 tbl

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