Method and device for selecting interval in given frequency spectrum for frequency division multiple access systems

FIELD: communications.

SUBSTANCE: present invention pertains to a method and device for estimating power using a subscriber point in a frequency division multiple access system (FDMA) in the process of selecting an interval. That way the power of the signal, related to one interval, can lead to detection of power in an adjacent interval, even if there is actually no signal in the neighboring interval.

EFFECT: faster selection of an interval; no extra signal processing required.

32 cl, 6 dwg

 

The technical FIELD

The invention relates to wireless communications and, more specifically, to methods to select the interval in the wireless communication systems that implement multiple access frequency division multiple access (FDMA).

The LEVEL of TECHNOLOGY

A wide variety of ways wireless is designed to facilitate wireless communication. Multiple access frequency division multiple access (FDMA) relates to a method of wireless communication, when the available frequency spectrum is divided into a number of smaller frequency intervals. Each interval allocated spectrum is the carrier signal frequency that can be modulated with data. The separation of the allocated frequency spectrum into intervals may increase the amount of information that can be transmitted in the spectrum, and also provides a simple mechanism for allocating bandwidth providers. For example, individual intervals can be allocated to individual service providers, and wireless service provider may use one or more selected intervals to provide services to its subscribers.

Standard global system for mobile communications (GSM), standardized by the European Institute of standardization in the field of telecommunications (ETSI)is an example of a system that uses the methods of DMA. In Europe, for example, the bands at 900 MHz and at 1800 MHz is allocated to GSM. Bands at 900 MHz and 1800 MHz divided, according to GSM, approximately 548 frequency of approximately 200 kHz per interval. Different intervals allocated to different service providers for use in the networks of service providers. Some intervals are used as a network of radio beacons to inform the subscriber nodes, what are the intervals associated with a given network, while other intervals are used only to deliver network traffic to the mobile subscriber units and from them. In a GSM network, different frequency intervals also use multiple access with time division multiplexing (TDMA), in which the time segments specifically assigned within intervals for distributed time communication.

One of the challenging tasks in systems that implement the methods FDMA, such as GSM, is a sequence of selection operations or capture interval of the subscriber node. Subscriber node refers to a device, such as a mobile phone, or the like, which is used by the end user. In the FDMA system, the subscriber node scans various intervals allocated spectrum, finding the most desirable interval for communication. The most desirable time interval ti to the new case, is the interval associated with the network service provider of the subscriber node, or perhaps interval in which the service provider subscriber node has satisfactory roaming agreement. The intervals with higher received power is also more desirable than the intervals of lower power, for example, when choosing between intervals in the network of the given service provider.

The INVENTION

In one of the embodiments the present invention relates to a method containing the power measurement of the first signal associated with the first interval system multiple access frequency division multiple access (FDMA), the measurement of power of a second signal associated with the second interval of the FDMA system, and the second interval is adjacent to the first interval frequency, and setting a value indicating the measured power of the second signal, to a negligible value when the measured power of the second signal is more than the threshold value is less than the measured power of the first signal.

In yet another embodiment, the present invention relates to a method containing the signal associated with the interval FDMA system, and the interval covers the first frequency range, and filtering the signal to obtain a second frequency band, the second frequency di is the range less than the first frequency range. The method further comprises measuring the power of the filtered signal to identify the estimate of the power associated with the interval.

In yet another embodiment, the present invention relates to a subscriber node of the FDMA system, containing a receiver for receiving a first signal associated with the first interval of the FDMA system, and a second signal associated with the second interval of the FDMA system, and the second interval is adjacent to the first interval frequency, and a control unit for measuring the power of the first and second signals and establish the value indicating the measured power of the second signal, to a negligible value when the measured power of the second signal is more than the threshold value is less than the measured power of the first signal.

In yet another embodiment, the present invention relates to a subscriber node of the FDMA system, containing a receiver for receiving a signal related to the spacing of the FDMA system, and the interval covers the first frequency range, and a control unit for filtering the signal to obtain a second frequency band, the second frequency range lower than the first frequency range. The control unit measures the power of the filtered signal to identify the estimate of the power associated with the interval.

In yet another embodiment, the present invention relates to machine readable media containing instructions that facilitate the measurement of the subscriber system node FDMA power of the first signal associated with the first interval of the FDMA system, the measurement of power of a second signal associated with the second interval of the FDMA system, and the second interval is adjacent to the first interval frequency, and setting a value indicating the measured power of the second signal, to a negligible value when the measured power of the second signal is more than the threshold value is less than the measured power of the first signal.

In yet another embodiment, the present invention relates to machine readable media containing instructions capable of receiving a subscriber system node FDMA signal associated with the interval FDMA system, and the interval covers the first frequency range, and filtering the signal to obtain a second frequency band, the second frequency range lower than the first frequency range. In addition, the instructions provide measurement subscriber node of the power of the filtered signal to identify the estimate of the power associated with the interval.

In yet another embodiment, the present invention relates to a subscriber node system is neither FDMA, containing means for receiving a first signal associated with the first interval of the FDMA system, and a second signal associated with the second interval of the FDMA system, and the second interval is adjacent to the first interval frequency, means for measuring the power of the first and second signals and means for establishing a value indicating the measured power of the second signal, to a negligible value when the measured power of the second signal is more than the threshold value is less than the measured power of the first signal.

In yet another embodiment, the present invention relates to a subscriber node FDMA system containing means for receiving a signal related to the spacing of the FDMA system, and the interval covers the first frequency range, and means for filtering the signal to obtain a second frequency band, the second frequency range lower than the first frequency range. Subscriber node also includes a means for measuring the power of the filtered signal to identify the estimate of the power associated with the interval.

The details of one or more variants of the implementation are presented in the attached drawings and the description below. Other characteristics, objects and advantages will be apparent from the description and drawings, and from the formula from which retene.

BRIEF DESCRIPTION of DRAWINGS

Figure 1 - structural diagram illustrating a wireless communications system that implements the methods of communication FDMA according to the present invention;

2 is a diagram of a sequence of operations illustrating the sequence of operations select the interval implemented subscriber node wireless communication systems.

Figure 3 is a structural diagram of one embodiment of implementation of the subscriber node according to the present invention.

4 is a diagram of a sequence of operations illustrating the sequence of operations implemented in the subscriber node, illustrated in figure 3.

5 is a structural diagram of another variant of implementation of the subscriber node according to the present invention.

6 is a diagram of a sequence of operations illustrating the sequence of operations implemented in the subscriber node, illustrated in figure 5.

DETAILED DESCRIPTION

The present invention is directed to methods of estimating power for use by the subscriber node FDMA system in the selection process interval. Methods of evaluation capacity into account that adjacent intervals, i.e. adjacent in frequency, often have a small overlap. Thus, the signal power associated with one interval may lead to the detection of the power in the adjacent interval, even the EU is and no signal is actually not present in the adjacent interval. In accordance with the present invention, describes how to identify, reduce, or avoid detection of false-positive signals in such adjacent intervals, for example, during a scan to detect the capacity of GSM. In the present description, the expression "false signals" refers to the detection power in the interval when the signal is actually absent in this interval. By identify, reduce, or avoid detection of false-positive signals, it is possible to speed up the selection process interval and to avoid additional processing of false-positive signals in such adjacent intervals.

Figure 1 shows the structural diagram illustrating a system 10 for wireless communication which methods of communication FDMA. For example, the system 10 may include a system GSM entered ETSI. The GSM standard uses methods FDMA, in which the frequency band is divided into a large number of intervals, as well as ways TDMA, in which distributed over time communications scheduled within the specified time segments within intervals. In the following description of the many ways described in the context of GSM. However, identical or similar methods may also be used with various other wireless protocols or standards that use FDMA.

The system 10 wireless is Noah communication includes many base stations 12A-12C (collectively, the base station 12), which communicate with the subscriber node 14. Although shown only subscriber node 14, the system 10 generally includes a number of such nodes. Subscriber node 14 generally refers to a wireless device used by the end user. For example, in the GSM system subscriber node 14 is typically a mobile phone. However, the subscriber node 14 may also be implemented as any other portable computing device, such as a desktop or portable computer, personal digital assistant (PDA), interactive TV receiver, wireless data terminal, a wireless data collection device or any other wireless device for carrying out the communication in accordance with the described methods.

The base station 12 are typically stationary computers that are wireless way communicate with the subscriber node 14 to provide network access subscriber node 14. For example, the base station 12 may provide an interface between the subscriber node 14 and the public switched telephone network (PSTN), so that calls can be routed to the subscriber node 14 and from him. Alternatively or additionally, base station 12 may be associated with the packet data network is La packet voice data or packet data. The base station 12 are sometimes referred to as a base transceiver system (BTS).

The system 10 wireless operates according to the FDMA communication. The FDMA method relates to a method of wireless communication, in which the allocated frequency spectrum is divided into a number of smaller frequency "cells" (intervals). Each interval allocated spectrum is the carrier signal frequency that can be modulated with data. Each of the base stations 12 typically operates in a different frequency interval selected range.

One of the most difficult tasks in FDMA systems, such as system 10, is the process of selecting or capture interval subscriber node 14. In the process of selecting the interval, subscriber node 14 identifies the desired interval, which can provide network access subscriber node 14. If only one of the base stations 12 is controlled by the network service provider of the subscriber node 14, the subscriber node 14 must identify the interval associated with this base station, as desired interval of communication. On the other hand, if two or more of the base stations 12 are controlled by the network service provider of the subscriber node 14, the subscriber node 14 must identify the interval that a network service provider, for which the received signal is the highest. If any one is from the base station 12 is not controlled by the network provider of the subscriber node 14, the subscriber node 14 must identify the interval on the basis of other priorities. For example, if none of the base stations 12 is not controlled by the network provider of the subscriber node 14, the subscriber node 14 can select the interval used by another network provider, which is favorable roaming agreement. Can also be used in other types of priorities.

Figure 1 illustrates the components of the subscriber node 14 are precisely those components that are used in the selection process interval. There are many other components that are used for other functions, such as coding and demodulation of signals. However, for simplicity, additional components not shown.

The receiver/transmitter 20 receives wireless signals 18A-18C (collectively, the signals 18) from the base stations 12 via the antenna 21. The receiver/transmitter 20 may also be performed on the received signals of different functions for converting analog signals, such as filtering or scaling of signals. The receiver/transmitter 20 delivers the received signals in analog-to-digital (A/D) Converter 22, which discretetime analog signals to generate digital signals. Digital signals obtained by sampling a received analog signal, transmitted from the A/D converted is of the motor 22 in block 24 management which performs the described selection process interval.

Unit 24 controls may include a number of functional components, for example, implemented in hardware, software, firmware, or the like, for performing the process of the selection interval. For example, the unit 24 controls may include unit 26 scans the power unit 28 estimates the power shaper 30 ID (identifier) and the selector 32 intervals. Unit 24 can be implemented as a digital signal processor (DSP)executing software modules, or may contain discrete hardware components. Also, the unit 24 controls can be implemented in any combination of hardware, software, firmware, one or more programmable microprocessors, digital signal processors, or the like. The various components of the unit 24 of the control is illustrated for sake of clarity, but can be integrated with other components, for example, in hardware or software. When implemented in software, memory or other machine-readable media (not shown) may be attached to the unit 24 controls to provide storage of software implemented instructions, downloadable the block 24 management for execution.

Block 26 scanning power scans intervals allocated a frequency spectrum for allocation to the different signals associated with different intervals. In the GSM bands in the 900 MHz and 1800 MHz separated by approximately 548 frequency of approximately 200 kHz per interval. In this case, the block 26 scanning power allocates the signals associated with each of the 548 intervals.

Block 28 evaluation capacity measures and evaluates the capacity of different intervals. In addition, in accordance with the present invention, the block 28 cardinality estimation implements one or more methods, all of which can improve and accelerate the process of selecting the interval. In particular, the block 28 cardinality estimation takes into account some factors of system 10, which, otherwise, could distort an accurate assessment of power intervals. Block 28 cardinality estimation also supports a list of the different intervals in the order of the estimated capacity of different intervals from the interval with the highest power to the interval with the lowest power. An ordered list of intervals can be modified relative to the effective capacity of the various intervals, measured by the block 28 cardinality estimation, for example, when the block 28 cardinality estimation identifies the intervals, which are unlikely to be good candidates.

Shaper 30 ID uses an ordered list, supported the first block 28 cardinality estimation. In particular, the driver ID starts with the interval with the highest power in the list and generates the network ID for this interval. In GSM, the process of forming a network ID is a multi-step process. For example, for a given interval in GSM, the imaging unit 30 ID accepts digital signals from A/D Converter 24 and receives the channel correction frequency (FCCH), which can be used for coarse synchronization interval. Then, the imaging unit 30 ID decodes the sync channel (SCH), which provides the basic timing information for the respective base station 12 associated with the corresponding interval. As soon as the driver 30 ID gets SCH, it can decode service channels, such as channel broadcast (BCCH), and get the code terrestrial public mobile (PLMN), which identifies the network associated with the given interval.

The selector 32 intervals takes the generated network ID, for example PLMN codes, and selects the desired interval for use of the subscriber node 14 in a subsequent communication. The selector 32 intervals can implement a prioritization scheme in which selected intervals with high power associated with specific networks, but can be selected other intervals if the interval associated with a specific network, are not powerful enough. N the example, if none of the base stations 12 is not controlled by the network provider of the subscriber node 14, the selector 32 intervals can choose the interval used by another network service provider, for which satisfactory roaming agreement. Then, the selector 32 intervals instructs the receiver/transmitter 30 to communicate with the base station of the selected interval to register for subsequent communication with the respective base station in the selected interval. Usually, you will have a strong advantage in relation to the use of interval associated with the network provider that requested a subscriber node 14. However, the interval selected must meet the minimum requirement of power for reliable communication.

Figure 2 presents the block diagram of the selection process interval, implemented subscriber node 14. As shown in figure 2, the block 26 scanning power scans the intervals of the frequency spectrum (41) FDMA for separating signals of different intervals on the frequency elements. Then the block 28 cardinality estimation assesses the capacity of different intervals (42) taking into account channel effects, which could reduce the reliability of a power measurement unit 28 cardinality estimation. For example, as described more fully below, the block 28 cardinality estimation can measure power, but nastri is the substance of the measured power is negligibly small value, if the measured power is less than the predetermined lower limit, such as 15 dB, the measured power associated with the interval in the neighboring frequency element. In this case, the measured power can probably be attributed to the capacity of the adjacent interval, instead of the current interval, which is measured. Therefore, it is desirable to exclude such intervals from consideration in the selection process interval to avoid false detection intervals, which only seem to meet the specified requirements of minimum power due to effects of overlap.

Alternatively, the block 28 cardinality estimation can implement the filtering method, which can guarantee that the power associated with the adjacent interval, essentially, will not have impact on the measurement of capacity for a given interval. In particular, the filtering method may be used to narrow the frequency range that is used for the purpose of assessing power, reducing the probability that the signal power from one interval will cause the signal strength for adjacent intervals.

Block 28 cardinality estimation sorts the intervals based on the estimated power of the interval (43). In particular, the block 28 cardinality estimation generates a list of intervals on the estimated power from the highest to the lowest. Faure is irovel 30 ID forms a network ID for intervals (44), and the selector 32 intervals selects the desired interval based on the network ID and the estimated power levels (45). For example, the imaging unit 30 ID can form network ID from intervals with the highest level of power, and as soon as the selector 32 interval identifies the network ID associated with the service provider of the subscriber node 14, such interval may be selected, provided that the power level interval sufficient, and the sequence of formation of the ID can be completed.

In accordance with GSM standards may need to be selected interval was in the range of 70 most powerful intervals, i.e. intervals with the highest estimated power levels. Thus, if the network ID associated with the service provider of the subscriber node 14 is not within the 70 most powerful intervals, the selector 32 intervals selects the interval on the basis of other criteria, such as, if the interval associated with a different service provider for which it was established satisfactory roaming agreement. As soon as the selected interval of 70 higher power ratings (45), subscriber node 14 is logged for communication in such a selected interval (46). For example, receiver/transmitter 30 can transmit the registration information to one of the base stations 12 associated with the selected and what tervalon, and then use the interval for calls to a subscriber node 14 and from him.

In GSM and other communication protocols that use FDMA, adjacent intervals have a small overlap in frequency. Thus, if the signal is present in the same interval, the signal may affect the power measurement adjacent intervals, i.e. intervals, having a frequency adjacent to the frequency band interval where the signal is actually present. In particular, the signal in this interval, essentially, may be centered within a suitable frequency band, but may contain frequency components that are distributed on adjacent intervals. This effect of overlap may delay the process of selecting the interval, due to false detection of neighboring intervals.

When the signal is present in the first interval GSM intervals immediately adjacent to such first interval, typically have a signal, approximately 16 dB below the signal in the first interval, even if no signal in the adjacent intervals in the reality. Moreover, in some cases, signals, approximately 16 dB below the signal of the first interval may result in the presence of adjacent intervals within 70 most powerful intervals, making them candidates for additional treatment in the CE is provided with the GSM standard. If the effect of the overlap is not taken into account, the subscriber node 14 may need to actually handle (3·69+1)=207 intervals to ensure that 70 intervals of high power selector 32 intervals in reality. This can add a significant overhead in terms of time and processing to the selection process of the interval.

The best approach is to try to remove the adjacent intervals from consideration, if the power in adjacent intervals is caused only by the presence of a signal in the first interval. Subscriber node 14 may improve the selection process interval calculation of this effect overlap. Two alternative implementation to compute the effect of overlap is described below in more detail.

The first approach identifies the "false positive"signal when the measured power of the interval is less than the capacity of the adjacent interval, to a specific value, for example, 15 dB below the power of the neighboring interval. In this case, the interval can be declared false positive, and the estimated capacity for this interval can be set to a negligible value. The second approach implements a filtering method for estimating power. In particular, after receiving a signal associated with a range that includes the first frequency on Amazon, the signal may be filtered to obtain a second frequency band, the second frequency band is less than the first private range. The measured power of the filtered signal can then be used to identify the estimate of the power associated with the interval. Such filtering, especially for cardinality estimation, can significantly reduce the overlap capacity between adjacent intervals.

3 shows the structural diagram of the subscriber node 14A, which may correspond to a subscriber node 14 in Fig. 1. In this case, the subscriber node 14A contains the block 28A cardinality estimation, which includes a block 51 evaluation unit 52 and comparison unit 53 priority. Block 52 comparison identifies the "false positive"signal, when the power of the interval measured by the unit 51 estimates is less than the capacity of the adjacent interval, to a specific value, for example, 15 dB below the power of the neighboring interval. In this case, the block 52 comparison may declare a false signal, and the estimated capacity for this interval can be installed on a negligibly small value, thereby excluding it from consideration among the intervals of the greatest power, scanned subscriber node 14A. In particular, on the basis of negligible value estimated capacity, b is OK 53 priority then will give preference to such interval with very low priority.

The receiver/transmitter 20 receives wireless signals via the antenna 21, and may perform various functions for converting analog signals over the accepted signals, such as filtering or scaling of signals. The receiver/transmitter 20 sends the received signals to analog-to-digital (A/D) Converter 22, which performs the discretization of signals to generate digital signals. Digital signals characterizing the received analog signals transmitted from the A/D Converter 22 in block 24 of the control, which performs the process of selecting the interval.

Block 26 scanning power scans intervals allocated a frequency spectrum for allocation to the different signals associated with different intervals. Unit 28A evaluation capacity measures and evaluates the capacity of different intervals and performs the ways that can speed up the selection process interval. In particular, the block 51 evaluation measures the capacity of a given interval, and the block 52 comparison compares the measured power for this interval with the measured power associated with the intervals adjacent to this interval frequency. If the block 52 comparison determines that the measured power is less than the capacity of the neighboring interval at a certain value, p is the iMER, 15 dB below the power of the neighboring interval, block 52 comparison sets a value indicating the estimated capacity for this interval is negligibly small value. Block 53 priority, then, is to give preference to this interval with very low priority, based on the value set by the Comparer. On the other hand, if the block 52 comparison determines that the measured power is not less than the adjacent interval, to a specific value, the block 53 priority prefers interval based on the power measured by the unit 51 estimates for this interval.

Shaper 30 ID uses an ordered list of the supported unit 53 priority. In particular, the driver ID starts with the interval with the highest power in the list and generates the network ID for this interval. In addition, in the context of GSM, the imaging unit 30 ID queries the channel correction frequency (FCCH), then decodes the sync channel (SCH), and finally decodes the channel broadcast (BCCH)to get the code terrestrial public mobile (PLMN), which identifies the network associated with the given interval.

The selector 32 intervals takes the generated network ID, for example, PLMN codes, and selects the desired interval for use of the subscriber node 14 for subsequent implementation is tvline communication. In accordance with the present invention, the receiving network ID should not be taken for false-positive intervals in which the power of the interval may be due to the capacity of the neighboring interval as a unit 28A cardinality estimation identifies and reduces the capacity for such false-positive intervals. Thus, the process of selecting the interval can be improved, avoiding any delays in processing, otherwise associated with the analysis of the network ID for false-positive intervals.

4 shows the block diagram of the process implemented by the block 28A cardinality estimation in figure 3. As shown in figure 4, block 51 evaluation measures the power of the first interval (61), and then measures the power of the second interval adjacent to the first interval (62). Block 52 comparison may maintain a table or the like, which lists the measured power of the various intervals. Block 52 comparison sets whether the power of the second interval by more than the predefined value (X), the smaller the power of the first interval, where X is a certain value (63), such as a value in the range from 10 to 20 dB, depending on the filter. For example, the value X may be approximately equal to 15 dB. In any case, if the block 52 comparison determines that the capacity of the second interval bol is e than X have less power than the first interval (branch "Yes" at step 63), block 52 comparison sets a value indicating whether the estimated power of the second interval is negligibly small value (64). Then the block 53 priority will be to give preference to this interval with very low priority, based on the value set by the Comparer. On the other hand, if the block 52 comparison determines that the capacity of the second interval is not more than X have less power than the first interval (branch "no" at step 63), then no corrections are made. In this case, the block 53 priority prefers interval based on the power measured by the unit 51 estimates for this interval.

In accordance with the present invention the process presented in figure 4, can be applied to two adjacent intervals for a given interval. In other words, for each interval, the process in figure 4 can be applied to the previous interval, for example, having the Central frequency slightly lower frequency of the current interval and subsequent intervals, for example, having a center frequency, a higher frequency of the current interval. Another "second interval" to 4 may correspond to the preceding interval or subsequent interval, and the corresponding process can be applied in the relationship is to both of these neighboring intervals of the first interval. In addition, the process in figure 4 can be repeated for each of multiple intervals in the selected range.

Figure 5 provided structural diagram of the subscriber node 14C, which may correspond to a subscriber node 14 of figure 1. In this case, according to another variant implementation, the subscriber node 14C contains the block 28V cardinality estimation, which includes the filter 71, block 72 ratings and block 73 priority. The filter 71 receives the signal associated with the interval covering the frequency range of X and filters the signal to obtain a frequency range of Y, while Y is less than X. the Block 72 evaluation measures the power of the filtered signal to obtain an estimate of the power associated with the interval. Due to the filtering interval to obtain a frequency range smaller than the interval of influence overlap capacity of the adjacent intervals can be substantially reduced or eliminated. Accordingly, cardinality estimation, supported by the block 73 priority, must not include any false positive signals, in which the measured power is distorted by the presence of signals in adjacent intervals.

As a subscriber node 14A (Fig 3), in the subscriber node 14C (figure 5), the receiver/transmitter 20 receives wireless signals via the antenna 21, and can perform various functions of converting analog to the output signals over the accepted signals, such as filtering or scaling of signals. The receiver/transmitter 20 sends the received signals to analog-to-digital (A/D) Converter 22, which discretetime signals to generate digital signals. Digital signals complying with the analog signals sent from the A/D Converter 22 in the unit 24V control to perform the selection process of the interval.

Block 26 scanning power scans intervals allocated frequency spectrum to separate the different signals associated with different intervals. Block 28V evaluation capacity measures and evaluates the capacity of different intervals and implements methods to speed up the process of selection of the interval. The filter 71 receives the signal associated with the interval covering the frequency range of X and filters the signal to obtain a frequency range of Y, where Y is less than X. In particular, the frequency range of Y falls within the frequency range X and is narrower than the frequency range of X. Thus, a narrower frequency range Y filters out the impact of neighboring intervals. For example, in GSM, the value of X could correspond to approximately 200 kHz, which is the approximate width of the interval. In this case, the value of Y may be approximately equal to 100 kHz, and the range of Y centered otnositelnostn frequency interval.

Then the block 72 evaluation measures the power of the filtered signal to obtain an estimate of the power associated with the interval. By filtering interval to obtain a frequency range smaller than the interval, the overlap of the capacity of adjacent intervals can be substantially reduced or eliminated. Accordingly, cardinality estimation, supported by the block 73 priority, must not include any false positive signals, in which the measured power is distorted by the presence of signals in adjacent intervals.

Figure 6 presents a flowchart of the process implemented by the block 28V cardinality estimation in figure 5. As shown in Fig.6, the filter 71 that receives signals from the interval with a bandwidth associated with the interval (81), and filters the signals to obtain a bandwidth less than the bandwidth associated with the interval (82). For example, spacing 200 kHz, 900000 kHz to 900200 kHz may be filtered to obtain a bandwidth of 100 kHz, 900050 kHz to 900150 kHz, although desirable filtered range may be implemented by a variety of options. In any case, the block 72 evaluation forms evaluation capacity interval based on the level of the filtered signal (83). As the signal associated with the interval, filtered to obtain a frequency range smaller than the frequency range of the interval, then perekriti the capacity of adjacent intervals can be substantially reduced or eliminated. The process on 6 may be repeated for each of multiple intervals in the selected range.

The above described a number of embodiments. In particular, describes how to assess capacity, which calculates the overlap of signals between adjacent intervals FDMA system. These methods can be implemented in the subscriber node 14 in hardware, software, firmware or the like, to perform the selection interval or formation manual PLMN list. The choice of interval is usually to search for some desired PLMN. Detection PLMN may fail in identifying the desired PLMN. The formation of the manual PLMN list generally refers to the process when the user manually enters commands at the subscriber site to display all available networks, to allow the user to choose the network. When forming the hand-list of PLMN subscriber node will receive the network ID for a number of intervals of high power in the list. In accordance with the present invention the choice of the interval or formation manual PLMN list can be accelerated by using one or more of the described methods.

Exemplary hardware implementations can include implementation on a digital signal processor specialized integrated circuit (ASIC), programmable by the user Venti is Inoi matrix (FPGA), programmable logic device, specifically designed hardware components, or any combination thereof. In addition, one or more of the above methods can be performed, fully or partially, on the basis of software. In this case, the machine-readable medium may store or otherwise contain machine-readable instructions, i.e. software code that can be executed by a processor or DSP subscriber node to perform one or more of the methods described above.

For example, machine-readable media may include random access memory (RAM, RAM), a persistent storage device (RAM, ROM), nonvolatile random access memory (NVRAM), electrically erasable programmable memory (EEPROM EEPROM), flash memory or the like, associated with the unit 24 controls the subscriber node 14. In this case, the unit 24 controls can contain a processor or DSP that executes various software-implemented modules, stored on a machine-readable carrier. There are various other modifications without changing the nature and scope of the invention. Accordingly, these and other options for implementation are within the scope of the following claims.

1. The method of estimating power for use in the selection process, in which erval in the system multiple access frequency division multiple access (FDMA), in which

measure the power of the first signal associated with the first interval FDMA system;

measure the power of a second signal associated with the second interval of the FDMA system, and the second interval is adjacent to the first interval frequency; and

sets the value indicating the measured power of the second signal, to a negligibly small value, if the measured power of the second signal by more than a threshold value less than the measured power of the first signal.

2. The method according to claim 1, wherein the FDMA system contains system global system for mobile communications (GSM).

3. The method according to claim 1, in which the mentioned negligibly small value approximately equal to zero.

4. The method according to claim 1, in which the mentioned threshold value is in the range from about 10 to 20 dB.

5. The method according to claim 4, in which the mentioned threshold value is approximately 15 dB.

6. The method according to claim 1, which further

measure the cardinality of the set of signals associated with multiple intervals FDMA system; and

sets the value indicating the measured power of this one of the signals associated with this interval is negligibly small value, if the measured power of the signal by more than a threshold value less than the measured power of others is Gogo one of the signals, associated with the interval adjacent to the given interval.

7. The method according to claim 6, which further

assign a priority to many signals on the basis of the values indicating the measured signal power;

choose the desired one of the intervals based at least in part, assign priorities; and

logged on to the network associated with the desired interval.

8. The method of estimating power for use in the selection process interval in the system multiple access frequency division multiple access (FDMA), in which

receive a signal associated with the interval FDMA system, and the interval covers the first frequency range;

filtered signal to obtain a second frequency band, the second frequency range is lower than the first frequency range; and

measure the power of the filtered signal to obtain an estimate of the power associated with the interval.

9. The method according to claim 8, in which the FDMA system contains system global system for mobile communications (GSM).

10. The method according to claim 9, in which the first frequency range is approximately 200 kHz and the second frequency range is approximately 100 kHz.

11. The method according to claim 8, which further

filter the set of signals associated with the intervals of the FDMA system, for receiving the showing frequency range;

measure the cardinality of the filtered signals;

assign priority to the set of filtered signals based on the measured power of the filtered signals;

choose the desired one of the intervals based at least in part, assign priorities; and

logged on to the network associated with the desired interval.

12. Subscriber system node multiple access frequency division multiple access (FDMA), containing:

a receiver for receiving a first signal associated with the first interval of the FDMA system, and a second signal associated with the second interval of the FDMA system, and the second interval is adjacent to the first interval frequency; and

a control unit for measuring the power of the first and second signals and establish the value indicating the measured power of the second signal, to a negligible value when the measured power of the second signal by more than a threshold value less than the measured power of the first signal.

13. Subscriber node 12, in which the FDMA system contains system global system for mobile communications (GSM).

14. Subscriber node 12, which referred to a negligible value approximately equal to zero.

15. Subscriber node 12, in which the mentioned threshold value find the camping in the range from approximately 10 to 20 dB.

16. Subscriber node 12, in which the threshold value is approximately 15 dB.

17. Subscriber node 12, in which the receiver receives the set of signals associated with multiple intervals FDMA system, and the control unit measures the power of multiple signals and sets the value indicating the measured power of this one of the signals associated with the given one of the intervals at negligibly small value, if the measured power of the signal is less than the measured power of another signal associated with an interval adjacent to the given interval.

18. Subscriber node 17, in which the control unit assigns priorities to the multiple signals on the basis of the values indicating the measured power of the signal, selects a desired one of the intervals based at least in part, assign priorities, and provides registration of the subscriber node in the network associated with the desired interval.

19. Subscriber system node multiple access frequency division multiple access (FDMA), containing a receiver for receiving a signal related to the spacing of the FDMA system, and the interval covers the first frequency range; and a control unit for filtering the signal to obtain a second frequency band, the second frequency range lower than the first is astaty range, and measure the power of the filtered signal to obtain an estimate of the power associated with the interval.

20. Subscriber node in claim 19, in which the FDMA system contains system global system for mobile communications (GSM).

21. Subscriber node in claim 20, in which the first frequency range is approximately 200 kHz and the second frequency range is approximately 100 kHz.

22. Subscriber node in claim 19, in which the control unit filters the set of signals associated with the intervals of the FDMA system, for receiving the second frequency range, measures the cardinality of the filtered signals, assigns priorities to the set of filtered signals based on the measured power of the filtered signals, selects a desired one of the intervals based at least in part, prioritization, and provides registration of the subscriber node in the network associated with the desired one of the intervals.

23. Machine-readable media containing instructions that provide at the customer site system multiple access frequency division multiple access (FDMA):

power measurement of the first signal associated with the first interval FDMA system;

power measurement of a second signal associated with the second interval of the FDMA system, and the second interval is adjacent to the first interval cha is the Thoth; and

setting values indicating the measured power of the second signal, to a negligible value when the measured power of the second signal by more than a threshold value less than the measured power of the first signal.

24. Machine-readable medium according to item 23, and the FDMA system contains system global system for mobile communications (GSM).

25. Machine-readable medium according to item 23, and the threshold value is in the range from about 10 to 20 dB.

26. Machine-readable media containing instructions that provide at the customer site system multiple access frequency division multiple access (FDMA):

receiving a signal related to the spacing of the FDMA system, and the interval covers the first frequency range;

filtering the signal to obtain a second frequency band, the second frequency range lower than the first frequency range;

and measuring the power of the filtered signal to obtain an estimate of the power associated with the interval.

27. Machine-readable media on p, and the FDMA system contains system global system for mobile communications (GSM).

28. Machine-readable medium according to item 27, and the first frequency range is approximately 200 kHz and the second frequency range is approximately 100 kHz.

29. Subscriber node system is neither multiple access frequency division multiple access (FDMA), contains:

means for receiving a first signal associated with the first interval of the FDMA system, and a second signal associated with the second interval of the FDMA system, and the second interval is adjacent to the first interval frequency;

means for measuring the power of the first and second signals; and

means for establishing a value indicating the measured power of the second signal, to a negligibly small value, if the measured power of the second signal by more than a threshold value less than the measured power of the first signal.

30. Subscriber host by clause 29, in which the FDMA system contains system global system for mobile communications (GSM), and the threshold value is in the range from about 10 to 20 dB.

31. Subscriber system node multiple access frequency division multiple access (FDMA), containing:

means for receiving a signal related to the spacing of the FDMA system, and the interval covers the first frequency range;

means for filtering the signal to obtain a second frequency band, the second frequency range lower than the first frequency range; and

means for measuring the power of the filtered signal to obtain an estimate of the power associated with the interval.

32. Subscriber host by p, in which the FDMA system contains system global system for mobile communications (GSM), the first frequency range is approximately 200 kHz and the second frequency range is approximately 100 kHz.



 

Same patents:

FIELD: communications.

SUBSTANCE: through conversion to specific information, contained in a channel, user equipment (UE) establishes a point-to-point connection with a base transceiver station (BTS) without interrupting reception of multimedia broadcast batch service (MBMS), which is the engineering solution.

EFFECT: new channel for controlling direct exchange line.

16 cl, 3 dwg

FIELD: communications.

SUBSTANCE: to realise data transfer service in a radio communication system, which can be received by a mobile station in inactive state, the first network radio transmits along the signalling channel, which can be received by a mobile station in inactive state, information on the data transfer service. The information contains at least a code for the data transfer service and instructions for identification of at least a second network radio, through which data of that data transfer service is transmitted.

EFFECT: economising bandwidth.

7 cl, 1 dwg

FIELD: communications.

SUBSTANCE: proposed method of transmitting identifier update information through a base station in a broadband wireless access communication system comprises stages, on which a registration request message is received from a mobile station. A registration reply-message is sent to the mobile station. The registration reply-message contains information on updating the identifier, containing the bit map region and the region of the new identifier. The bit map region indicates whether at least one identifier has been updated or not, corresponding to at least one service. The region of the new identifier comprises at least one new identifier in accordance with a predetermined bit value in the bit map region.

EFFECT: increased efficiency of using radio resources.

30 cl, 4 dwg, 4 tbl

FIELD: radio engineering.

SUBSTANCE: equipment and method for positioning in sector for wireless communication device and data transmission from base station to wireless communication device through signalling channel in wireless communication network without allocated data access channelisation. When base station is ready to transmit data through signalling channel to wireless communication device, at first it sends routing table update message to wireless communication device. Wireless communication device sends response back to base station, not starting any traffic channelisation procedure. The response is delivered with sector position information to base station. After response is received base station transmits data to signalling channel in sector where wireless communication device is connected.

EFFECT: internet protocol (IP) data package transmitting to signalling channel without transmitting of IP data packages to sectors where target wireless communication device is not connected, thus avoiding network flooding with unnecessary signalling messages.

22 cl, 4 dwg

FIELD: radio engineering.

SUBSTANCE: invention refers to wireless communication networks and is intended for transmission of call/broadcast alert message to wireless communication devices and for reception of call/broadcast alert message. Wireless communication network accept each incoming call arranged for wireless communication device by transmission of call/broadcast alert message in corresponding section of digital radio communication frame of preset format. As response to each broadcast event the network transmits repeating broadcast alert message notifying about availability of broadcast information from network. Broadcast alert message is retransmitted in each frame of digital radio communication. Other sequence features wireless communication device operation in this network. As response to activation from expectation state the wireless communication device estimates quality of received signal. Wireless communication device also receives scheduled network transmission of call alert message and set of copies (at least one) of repeating alert message transmitted through broadcast network repeated for each scheduled transmission of call alert message. This number varies in inverse proportion to certain quality of signal.

EFFECT: functional enhancement due to available broadcasting information from network.

53 cl, 7 dwg

FIELD: radio engineering.

SUBSTANCE: invention refers to cellular telephone communications. Method of relaxed service transmission includes the first control channelisation through network between the first base station controller (BSC) and the first base transceiver station (BTS). Besides method includes the second control channelisation through network between the second BSC and the second BTS. Dial-up between mobile station (MS) and the first BTS is accompanied with evidence of MS signal reception from the second BTS that is sent to the first BSC. As respond to evidence start signal is transmitted from the first BSC to the second BTS. And as respond to reception of start signal to the second BTS, additional traffic, associative connected with dial-up, is directed between MS, the second BTS and the first BSC without transmission of the additional traffic through the second BSC.

EFFECT: every BTS is capable to connect through numerous communication lines with many BSC, and every BSC is capable to connect through numerous communication lines with many BTS.

24 cl, 4 dwg

FIELD: radio engineering.

SUBSTANCE: invention refers to identification of transmitters for signals received by terminal. In order to evaluate transmitter of this received signal, candidate list of transmitters which could transmit this signal is made out. Besides coverage area is detected to be used for received signal. This coverage area is area where terminal can receive signal to be identified. Then predicted power for each candidate transmitter is evaluated, e.g. using route and coverage area loss prediction model. Predicted powers for candidate transmitters are compared (directly or relatively) to measured power of received signal. Candidate transmitter with (direct/relative) predicted power closest to (direct/relative) measured power is considered to be that one transmitted this signal. Distribution delays can be predicted and used for transmitter identification as well.

EFFECT: estimation of terminal location.

27 cl, 12 dwg

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.

4 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: base station transmits alarm information for each service in accordance with a schedule, which includes a recurrence interval and a modification interval. The warning information is transmitted in each recurrence interval, so as to provide for fast receipt of that information using a wireless device. Changes in the critical alarm information are allowed at the beginning of each modification interval, which is an integer multiple of the recurrence interval. Every time, when the critical alarm information for a given service changes in a given modification interval, a notice indicator for the service is established in the whole preceding modification interval so as to inform the wireless device on the change. Wireless devices can detect the notice indicator, established in the preceding modification interval, and can search new critical alarm information in the next modification interval.

EFFECT: provision for transmitting alarm information for services with broadcasting and multicast transmission.

44 cl, 12 dwg

FIELD: information technology.

SUBSTANCE: if necessary, when switching from a packet switching domain to a channel switching domain, a mobile station receives a relay transmission number, initiates a session request in the channel switching domain, receiving a relay transmission number in form of a call number, and sends a session request in the channel switching domain to the access network of the packet switching domain, which routes the session request in the channel switching domain to the control object of channel switching domain calls. The internetworking communications server, in accordance with the relay transmission number, establishes a connection for session request of the channel switching domain with the initial mobile station session an notifies the mobile station on the need to carry out relay transmission of a radio interface from the packet switching domain to the channel switching domain and the mobile station notifies the internetworking communications server on the need to complete relay transmission from the packet switching domain to the channel switching domain.

EFFECT: simplification of the routing process and reduced cost.

18 cl, 12 dwg

FIELD: communications.

SUBSTANCE: user data are sent in parallel with information of the transmitter in many implementation versions In many cases the user data is allocated more than 20% of the maximum output power of the transmitter. A defined power value of tones is used. The tones are used for transmitting information from the transmitter, with simultaneous transmission of user data using more than 20% of the available transmission power.

EFFECT: increased efficiency.

65 cl, 14 dwg

FIELD: communication systems.

SUBSTANCE: device for a multiband communication system for ultra-broadband communication (UBC) comprises a transmitter subsystem, consisting of controller, configured with provision for dividing the ultra-broadband communication (UBC) channel into a pseudo-random sequence of N frequency subbands, modulator, configured with provision for generating a sequence of modulated pulses, transmitter, configured with provision for transmitting each modulated pulse in the above mentioned sequence, receiver subsystem, receiver, controller, configured with provision for combining, in the sequence of modulated signal pulses, received in accordance with the pseudo-random sequence of N frequency subbands and demodulator. In the method of transmitting data through ultra-broadband communication, the ultra-broadband communication channel is divided into a pseudo-random sequence of N frequency subbands. The signal is modulated in form of a pulse sequence. The modulated pulse is then transmitted in the given sequence using one of the above mentioned sequences of N frequency subbands. The ultra-broadband communication signal is received by a transmitter. The received N frequency subbands are combined. The ultra-broadband communication pulse sequence is demodulated from the combined N frequency subbands.

EFFECT: elimination of interference.

16 cl, 5 dwg

FIELD: electric engineering.

SUBSTANCE: button unit includes multiple switch buttons, lightguide sheet installed under at least one of multiple switch buttons, light radiator intended for generation of light at the edge of lightguide sheet, at that lightguide sheet directs light from light radiator in direction of at least one of multiple switch buttons, electronic circuit wafer generated under lightguide sheet, and multiple switches formed on substrate for electronic circuit, at that every of multiple switches corresponds to one of multiple switch buttons. Lightguide sheet is installed above the top section of every one of multiple switches.

EFFECT: development of button unit that makes it possible to reduce quantity of optical sources and value of consumed energy, by means of lightguide element application in button unit, and mobile terminal, in which this button unit is installed.

18 cl, 5 dwg

FIELD: information technologies.

SUBSTANCE: invention refers to device and method of data reception in wireless terminal, particularly to device and method of communication and data processing received from device set. Device contains the first data device and the second data device generating the first data and the second data according to the first mode select input and the second mode select input respectively; data processor from several sources activating of data device chosen between the first and second data device in response to mode select input; data interface connected to the first and second data devices buffering data generated by data device activated by mode select input at specified data volume so that data can be processed in data processor from several sources, and coordinating buffered data; display representing image data displayed from data processor from several sources; and audio processor reproducing audio data represented from data processor from several sources.

EFFECT: actual maintenance of data processing devices from several sources in wireless terminal.

17 cl, 19 dwg, 1 tbl

FIELD: electricity.

SUBSTANCE: system contains terminal data collection and transmission units (DCTU), operating on different frequencies within chosen operating band, measuring devices and central DCTU. Every terminal DCTU contains microcontroller and interface block. Central DCTU contains the second interface block, analog-to-digital converter and external interface unit. Every terminal DCTU contains pulse hopping signal shaper generating randomly varying carrier frequency. Central DCTU contains pulse hopping signal processing module.

EFFECT: higher range, noise immunity and reliability due to implementation frequency hopping technology.

3 cl, 5 dwg

FIELD: information technology.

SUBSTANCE: signal information, in form of a first set of information, subject to transmission more than one time on one communication channel, is stored in form of a priori known signal information. This can be previously received and/or detected information, internal transmitted information or some other relevant signal information contained in a node. Signal information in form of a second set of information is received. Transmission of the first set of information creates interference for receiving the second set of information. In spite of that interference part of the second set of information can more or less be detected using the received signal information and part of the priori known signal information previously stored. Information is detected through suppression of interference based on the received signal information and corresponding parts of the priori known information. The set of priori known signal information is preferably updated by continuous storage of new detected information.

EFFECT: improvement of operating parameters of wireless rebroadcasting networks.

31 cl, 20 dwg

Shf transmitter // 2340093

FIELD: electricity.

SUBSTANCE: SHF transmitter contains body with SHF power amplifier stage attached to heat sink and interconnected with divider at inputs and interconnected with adder at outputs, and set of power capacitors united and fixed, e.g. on transmitter body. Capacitors are connected with SHF transistor power amplifiers through strap providing pulse current transfer with specified time parameters.

EFFECT: more reliable performance due to improved heat transfer.

1 dwg

FIELD: physics, communication.

SUBSTANCE: invention is related to systems of wireless communication. Method and system for distribution of data bursts in system of wireless communication with availability of frame installed along symbol interval axis and frequency band axis, frame includes the first area, in which MAP-message is transmitted, and the second area, to which data bursts are distributed, the third area on the basis of symbol interval and frequency band is located in the second area, data bursts are serially distributed to the third area from the first interval of symbol along axis of frequency band.

EFFECT: provision of efficient distribution of data bursts in system of wireless communication.

14 cl, 2 dwg

FIELD: physics, control.

SUBSTANCE: invention is related to mobile terminals with hinged joint. Mobile terminal includes the first casing element, the second casing element, which is connected to the first casing element with the possibility of rotation; component of hinged connection that connects the first casing element with the second casing element with the possibility of rotation, and hinged joint installed on component of hinged connection and adjusting torque applied to the first casing element in process of the first casing element opening and closing.

EFFECT: increase of application convenience.

24 cl, 9 dwg

Receiving device // 2339162

FIELD: physics, radio.

SUBSTANCE: invention is related to radio communication and may be used in radio engineering systems. Receiving device contains amplifier, frequency amplifier with suppression of mirror channel, the first amplifier of intermediate frequency (UPCh), N sources of heterodyne voltage for different frequencies, group N - 1 UPCh, group N UPCh, unit of heterodyne voltage switching, main channel frequency converter, two controlled switching units, resolver, switch, unit of switchboards control, amplifier of acoustic frequencies.

EFFECT: efficient elimination of interference in mirror channel.

5 dwg

FIELD: radio engineering; construction of radio communication, radio navigation, and control systems using broadband signals.

SUBSTANCE: proposed device depends for its operation on comparison of read-out signal with two thresholds, probability of exceeding these thresholds being enhanced during search interval with the result that search is continued. This broadband signal search device has linear part 1, matched filter 2, clock generator 19, channel selection control unit 13, inverter 12, fourth adder 15, two detectors 8, 17, two threshold comparison units 9, 18, NOT gates 16, as well as AND gate 14. Matched filter has pre-filter 3, delay line 4, n attenuators, n phase shifters, and three adders 7, 10, 11.

EFFECT: enhanced noise immunity under structural noise impact.

1 cl, 3 dwg

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