Basic station (versions), method to transfer data (versions) and communication system

FIELD: information technologies.

SUBSTANCE: in a basic station there are several types of frequency band width for use in a communication system. The basic station comprises a transfer module, arranged with the possibility to transfer transferred data using a frequency band width from a number of several types of frequency band width in the frequency band aligned at a previously specified central frequency; and a multiplexing module made with the possibility of synchronisation channel multiplexing into a central frequency band of the previously specified width, including a central frequency of frequency band used in a transfer module, no matter what the frequency band width used in the transfer module is.

EFFECT: simplified procedure of connection to a downlink.

28 cl, 21 dwg

 

This application is divided from application No. 2008100226 patent of the Russian Federation for the invention, filed 13.06.2006 claiming the priority date of the filing of the first application JP 2005-174399, filed in the Japan Patent office 14.06.2005.

The technical field to which the invention relates.

The invention generally relates to the field of radio communications, in particular to a base station, communication system and data transmission method that can be used in multiple frequency bands.

The level of technology

In existing communication systems, such as system broadband code division multiple access (Wideband Code Division Multiple Access W-CDMA), GSM system and other similar systems, the Central frequency of the frequency band used for communication is determined to be equal to a preset frequency, called a raster or frequency raster (frequency raster). The frequency raster placed along the frequency axis, for example, every 200 kHz. Therefore, the mobile station sequentially examines the frequency rasters on the axis of frequency (every 200 kHz) to determine the center frequency of the operator, so that the mobile station can connect to the downlink. The following non-patent documents 1 and 2 describe the search for the downlink in a cell.

Document 1: 3GPP, TS25.101, "User Equipment (UE) radio transmission and reception (FDD)", p.12-14.

Document 2: Keiji Tachikawa, "W-CDMA mobile communication scheme, MARUZEN, p.35-45.

Researched wireless communication system supporting a scheme of multiplexing orthogonal frequency division (orthogonal frequency division multiplexing, OFDM), which uses a set of wide and narrow bands. The reason for employing the OFDM scheme is that it can effectively suppress interference from distribution through multiple paths (multipath interference), intersymbol interference, etc. In the communication system takes into account that different operators can provide services in accordance with the hardware configuration of the mobile station, a hardware configuration of a base station, application, etc. can get a wide band of frequencies, such as 20 MHz, and part of the frequency band (for example, 5 MHz).

1 schematically depicts the spectrum of a radio communication system according to the OFDM scheme having a set of frequency bands. In sauté And communication for OFDM is performed in a wide frequency band 20 MHz, and in a narrow band of frequencies at 5 MHz. The narrow frequency band of 5 MHz is located along the frequency axis at the right end of the wide bandwidth of 20 MHz. In addition, in a cell, different from the cell A, the communication scheme is OFDM is performed using the frequency band 5 MHz. Bandwidth in a cell In is located on the axis of frequencies outside the bandwidth of 20 MHz in cell A. As stated above, the frequency rasters are placed on the pre-task is different intervals on the axis of frequency. In the depicted example, the frequency rasters are placed every ΔrasterHz, starting from the point X Mz at the left edge of the spectrum. The Central frequency fAbandwidth 20 MHz in a cell And is located in the frequency raster X+2Δraster. The Central frequency finbandwidth 5 MHz sauté In is located in the frequency raster X+5Δraster.

On the other hand, the interval between subcarriers is set independently of the frequency of the raster, and the interval between frequency rasters is not necessarily a multiple of the interval between subcarriers. Thus, even when the Central frequency fAthe wide bandwidth of 20 MHz is located in the raster, it can be expected that the Central frequency fA' part of the frequency band width of 5 MHz is not always located in the raster. Therefore, there is the risk of the problem lies in the complexity of the actions of the mobile station that wants to use the frequency band of 5 MHz in a cell And to connect to the downlink, and the process of finding the center frequency.

Disclosure of inventions

The present invention is to create a base station, communication system and data transmission method for facilitating the connection to the downward signal in the mobile communication system in which communication is performed on the OFDM scheme using any of several frequency bands.

The invention provides a base station which defines several types of bandwidth for use in a communication system. The base station includes a transmission module, configured to transmit the transmitted data using the bandwidth from among several types of bandwidth in the frequency band centered at a predetermined center frequency; and a multiplexing module, configured to multiplex the channel synchronization in a Central frequency band of predetermined width, comprising the Central frequency of a frequency band used in the module of the transfer, regardless of the bandwidth used in the transmission module.

In another aspect the present invention provides a base station which defines several types of bandwidth for use in a communication system. The base station includes a transmission module, configured to transmit the transmitted data using the bandwidth from among several types of bandwidth in the frequency band centered at a predetermined center frequency; and a multiplexing module, configured to multiplex the control channel in the Central band frequency preset widths of the, including the center frequency of a frequency band used in the module of the transfer, regardless of the bandwidth used in the transmission module.

In another aspect the present invention provides a data transmission method, which identifies several types of bandwidth for use in a communication system. The method comprises steps, in which transmit data to be transmitted in downlink using bandwidth from among several types of bandwidth in the frequency band centered at a predetermined center frequency; and multiplexer channel synchronization in a Central frequency band of predetermined width, comprising the Central frequency of the band, regardless of bandwidth.

In another aspect the present invention provides a data transmission method, which identifies several types of bandwidth for use in a communication system. The method comprises steps, in which transmit data to be transmitted in downlink using bandwidth from among several types of bandwidth in the frequency band centered at a predetermined center frequency; and multiplexer the control channel in the Central band frequency preset is Irina, including the center frequency of the band, regardless of bandwidth.

In another aspect the present invention provides a communication system, which defines several types of bandwidth for use in this system. The system includes a base station configured to transmit data transmitted using the bandwidth from among several types of bandwidth in the frequency band centered at a predetermined Central frequency, and with the possibility of multiplexing channel synchronization in a Central frequency band of predetermined width, comprising the center frequency of the bandwidth, regardless of the bandwidth; and a mobile station, configured to receive the sync channel from the base station to maintain synchronization with the base station, and capable of receiving data transmitted from the base station.

In another aspect the present invention provides a base station which defines several types of bandwidth for use in a communication system. The base station includes a transmission module, configured to transmit the transmitted data using the bandwidth from among several types of bandwidth cha is one; and a multiplexing module, configured to multiplex the channel synchronization in a Central frequency band of predetermined width, comprising the Central frequency of a frequency band used in the module of the transfer, regardless of the bandwidth used in the transmission module.

In another aspect the present invention provides a base station which defines several types of bandwidth for use in a communication system. The base station includes a transmission module, configured to transmit the transmitted data using the bandwidth from among several types of bandwidth; and a multiplexing module, configured to multiplex the control channel to the Central frequency band of predetermined width, comprising the Central frequency of a frequency band used in the module of the transfer, regardless of the bandwidth used in the transmission module.

According to the invention in a mobile communication system in which communication scheme is OFDM is performed using either of the two frequency bands or any of the more than two frequency bands, simplifies the process of connecting to the downlink.

Brief description of drawings

1 schematically depicts the spectrum of the system radios the ides of OFDM scheme with a set of frequency bands;

figure 2 depicts a block diagram of a transmitter according to a variant implementation of the present invention;

figure 3 depicts a block diagram of a receiver according to a variant implementation of the present invention;

figure 4 is a diagram depicting an example of a distribution channel synchronization;

figure 5 is a diagram showing the principle of determining the center frequency band;

6 is a diagram showing an example configuration of the control channel;

figa is a diagram depicting a block diagram of the sequence of operations according to a variant implementation of the present invention;

FIGU is a diagram showing the operation on the axis of the frequencies according to a variant implementation of the present invention;

Fig is a block diagram of a transmitter according to a variant implementation of the present invention;

Fig.9 is a block diagram of a receiver according to a variant implementation of the present invention;

figure 10 illustrates the principle of determining the center frequency band;

11 is a diagram depicting another example of the distribution channel synchronization;

Fig is a diagram depicting another example of a distribution channel synchronization;

Fig is a diag is the Amma, depicting another example of a distribution channel synchronization;

Fig is a diagram depicting another example of a distribution channel synchronization;

Fig is a diagram depicting another configuration example of the control channel;

Fig is a diagram showing an example of a scrambling code, which is multiplied by the channel management;

Fig is a diagram depicting an example of a scrambling code, which is multiplied by the channel management;

Fig is a diagram depicting a configuration example of the control channel;

Fig is a diagram depicting another configuration example of the control channel;

Fig is a diagram depicting another configuration example of the control channel.

The figures use the following notation:

MUX - multiplexing module

FFT module fast Fourier transform

IFFT module inverse fast Fourier transform

Gl - module insert the module or remove the guard interval

RF - radio

The implementation of the invention

According to a variant implementation of the present invention, the sync channel transmitted from the base station to the mobile station using the frequency band with the location is Noah in the raster center frequency f Athe first band (20 MHz), having a width equal to or greater than the width of the second frequency band (5 MHz). The control channel contains information about the center frequency to determine the center frequency fA' the second frequency band transmitted from the base station to the mobile station using a frequency band near the center. As the mobile station is rebuilt on the desired frequency band after receiving information about the center frequency using a frequency band with a center frequency located in the raster, the mobile station can connect to the desired frequency band, without exploring frequency that does not coincide with the raster.

The sync channel and the control channel may be transmitted using a frequency band that includes the button in the raster center frequency of the first frequency band and having the same width as the second frequency band. Accordingly, the mobile station is able to correctly connect to the downlink, regardless of frequency bands. Channel synchronization and/or control channel may be transmitted using the first frequency band. Accordingly, the information varying depending on the frequency band used for communication, can be included in the control channel.

The sync channel can be distributed over h is the frequency of intervals, each of which is wider than the interval between subcarriers. Since subcarriers, which was not distributed channel synchronization, can be assigned to other information, the effectiveness of knowledge transfer can be improved.

The control channel can be encoded by means of two-dimensional scrambling code that is distributed over the frequency band, including button in the raster center frequency of the first frequency band and having a width equal to or greater than the width of the second frequency band in a two-dimensional code scrambling, which is distributed by the first band of frequencies and is equal to one time interval for transmission or surpasses it. Accordingly, the mobile station can demodulate the control channel, without changing the code scrambling after the establishment of synchronization.

The basic control information is transmitted using a frequency band that includes the button in the raster center frequency of the first frequency band and having the same width as the second frequency band may include control information common to all mobile stations using any frequency band and the control information transmitted using the third frequency band that is different from the second frequency band may include control information specific to the mobile station using t is etu bandwidth.

Mobile station according to a variant implementation of the present invention includes a means of receiving downlink signal transmitted using any of the two frequency bands or any of the more than two frequency bands; means defining a sync channel and a control channel transmitted from the base station using a frequency band that includes the button in the raster center frequency of the first frequency band and having a width equal to or greater than the width of the second frequency band; means retrieves information about the Central frequency of the control channel; and means changing the frequency band to receive signals in accordance with information about the Central frequency.

The first option exercise

Figure 2 schematically depicts a transmitter according to a variant implementation of the present invention. The transmitter is typically included in the base station. The transmitter includes a module (MUX) MUX designed for multiplexing data singlegroup module IFFT (inverse fast fourier transform), intended for realization of the inverse fast Fourier transform on the multiplexed data module (GI) add guard interval that is designed to add a guard interval to the signal, modulated according to the OFDM scheme, which was Khujand is realised inverse Fourier transform, as well as serving for the issuance of characters that you want to send, and radio (RF)used for converting characters that you want to transfer, in the format of signals for transmission on the radio frequency.

Figure 3 depicts a block diagram of a receiver according to a variant implementation of the present invention. The receiver is usually included in the mobile station. The receiver includes a radio frequency (RF), designed to convert the received antenna signal in a symbol in a digital format, the module (GI) removal of the guard interval that is designed to remove the guard interval of the symbol in order to issue a valid symbol, module FFT (fast fourier transform), designed to give a fast Fourier transform on the data valid characters in order to implement the modulation scheme is OFDM, and the module determine the correlation used to calculate the correlation between the data modulation scheme ODFM, and preset singlegroup to determine the maximum correlation.

Figure 4 depicts examples of the distribution channel synchronization, multiplexed in a multiplexing module, shown in figure 2. Base station and mobile station can communicate with an arbitrary frequency band from a variety of wide and narrow bands. The figure shows an example of the distribution channel synchronization using for communication frequency bands of 20 MHz, 10 MHz or 5 MHz. When the base station uses a frequency band width of 20 MHz, the transmitter of the base station distributes the data channel synchronization on all subcarriers. For simplicity, for a width of 20 MHz 40 shown subcarriers, although in fact there are many more. In the figure each number 1-40 depicts the phase code. When the channel synchronization produces singlegroup using sequence data d1d2...,d40this sequence data is placed along the frequency axis and are distributed on each subcarriers. On the shape of the number "1", "2"... correspond to the d1d2...

When the base station uses a frequency band of 20 MHz and the mobile station uses the same frequency band 20 MHz, the mobile station can easily detect the center frequency of the frequency band 20 MHz when searching for a cell and can connect to the downlink for subsequent communication. When the mobile station uses the frequency band 5 MHz Central frequency which differs from the center frequency of the bandwidth of 20 MHz, the following operations are carried out. The mobile station sends singlegroup of d16d17...,d25in the module definition of the correlation shown in figure 3. Thus, as shown in figure 5, the mobile station can determine the center frequency fAp the band of frequencies of 20 MHz. The module determine the correlation calculates correlations by means of the phase shift between the received signal with a copy of the sync channel d16d17...,d25thus in determining the frequency at which the correlation value reaches its maximum. When calculating the correlation, even when the shift is only one of subcarriers, the correlation value decreases. Accordingly, the center frequency band can be accurately determined. As singlegroup you can use pseudotumour (pseudonoise, PN) code sequence, the code sequence Golda and various other sequences. You just need to get the most and to determine the position by calculating the correlation.

In this example, in a cell where the mobile station using the frequency band 5 MHz, are present in the bandwidth of 20 MHz, 10 MHz and 5 MHz, so that the mobile station can use any of them. In addition, the base station can perform transmission by distribution channel synchronization on all subcarriers, as shown in figure 4 (1). The base station transmits control information for all users (common control channel) using a bandwidth of 5 MHz, centered on the Central frequency fAas shown in Fig.6. As described the in the consideration of figure 5, mobile station using the frequency band 5 MHz, can also determine the center frequency fAand to properly demodulate the control channel transmitted using a bandwidth of 5 MHz, centered on frequency fA. The common control channel includes information about the center frequency, which can specify the position of the Central frequency fA' (which usually misses raster) bandwidth 5 MHz, uses part of the bandwidth of 20 MHz. Information about the center frequency may include information indicating, for example, how far the frequency fA' is deleted from the frequency fAin the raster. The mobile station demodulates the common control channel, reads the information about the center frequency sets the frequency synthesizer in the radio (such as the RF module shown in figure 3)to establish a center of the frequency band 5 MHz, the received mobile station, the frequency fA'. After that, the mobile station can transmit the data channel and other channels using a frequency band of 5 MHz, which is on the right end of the frequency band 20 MHz.

Figa depicts a block diagram of the sequence of operations according to a variant implementation of the present invention. 7 schematically shows In a situation in which the mobile station connects to the descending line of the ligature according to the specified sequence. The example operation described with reference to both figures. The control channel and the sync channel transmitted from the base station using the frequency band (main band) 5 MHz, which includes the center frequency of the bandwidth of 20 MHz. Channel management and channel synchronization are implemented so that they had a structure common to all mobile stations regardless of the frequency band used by the mobile station (regardless of the bandwidth is 5 MHz, 10 MHz, 20 MHz, etc). In stage 1, the sync channel and the control channel transmitted from the base station and the mobile station receives a sync channel, performing a cell search in order to establish synchronization. In stage 2, the mobile station receives the control channel and demodulates it to read information about the frequency. The frequency information includes information on a frequency band allocated to the mobile station (such as the shift value between the Central frequency and the bandwidth allowed for use). The information may include information of a base station, indicating that the bandwidth in the cell is 20 MHz. In step 3, the mobile station selects the frequency for receiving signals in the permitted frequency band notified by the control channel, so as to change the frequency band of communication. After that the rich station starts data transmission, using the permitted frequency band (for example, a width of 5 MHz). As indicated above, the Central frequency fAthe Central band is located in the raster, but the Central frequency fA' permitted bandwidth is not necessarily located in the raster. Thus, the mobile station is not easy to determine the center frequency permitted frequency bands without the above information about the frequency. Any mobile station can easily determine the center frequency on the raster of the Central frequency band and to demodulate the control channel. Thus, the mobile station can easily shift the center frequency to the desired frequency, is not located in the raster.

As shown in Fig.7, the mobile station uses the frequency band 5 MHz, first determines the center frequency fAbandwidth 20 MHz and receives a common control channel transmitted using the Central bandwidth of 5 MHz. It is necessary that the base station has prepared such a control channel as transmitted data and added them to the sync channel, to transfer them to a mobile station belonging to the base station. Mobile station is rebuilt on the frequency band of 5 MHz in the right end of the range, which you can use according opravlyaushi the information on the control channel. After this communication is performed using the reconstructed band.

It should be noted that in examples 2 and 3, although the sync channel is multiplexed and demultiplexed in the frequency domain, the multiplexing and demultiplexing can be performed in the time domain, as shown in Fig and 9. This is possible because it is necessary only that the mobile station can determine the center frequencies of 20 MHz and to demodulate the control channel.

The second option exercise

Figure 10 also shows an example of distribution channel synchronization. In the example in figure 10, while the base station can communicate only in the frequency band 5 MHz, the mobile station has the ability to use the bandwidth of 20 MHz. In this case, the mobile station cannot communicate using the whole bandwidth of 20 MHz. As shown in figure 4 (3), the base station transmits to a mobile station belonging to the base station, the sequence data with 10 blocks of data, namely d16d17...,d25that are part of sequence data from 40 blocks of data that are singlegroup channel synchronization. Mobile station prepares a sequence of data from 40 blocks of data, namely d1d2..., d40shown is as figure 4 (1), and calculates the correlation between the sequence and the received signal to determine the position of the maximum. As shown in figure 10, the mobile station determines the center frequency fAbandwidth 5 MHz to set the synchronization takes control channel transmitted using the frequency band, and determines that the base station can communicate only in the 5 MHz band.

What kind of bandwidth base station uses to communicate, may be reported using the downward control channel, or may be determined in the mobile station, as described in the following example. As an example, the mobile station determines three types of correlation values, as shown in figure 10. The first correlation value is the value of the correlation sequence data of the d16~ d25near the center. The second correlation value is the value of the correlation sequence data of the d11~ d30in which on both sides of the added data to the sequence data of the d16~ d25near the center, and the third correlation value is the value of the correlation sequence data of the d1~ d40throughout the area. For example, when the base station transmits the channel synchronization only in the frequency band 5 MHz, as in the example above,and the first and second, and third correlation value reflects the same size max. However, when the base station transmits the channel synchronization using bandwidth 10 MHz, as shown in figure 4 (2), the first correlation value is less than the second correlation value, and the value of the second correlation values almost equal to the value of the third correlation values. The reason is that, the longer the sequence data, the greater the maximum correlation values. In addition, when the base station transmits the channel synchronization using the entire bandwidth of 20 MHz, the first, second and third correlation values get in ascending order of magnitude. Thus, calculating correlation values from the first to the third and comparing them, you can determine the bandwidth of the base station.

A third option exercise

11 depicts another example of a distribution channel synchronization. While synchronization is supported in the mobile station, the channel synchronization is not necessarily added in the entire area of the used frequency band. In the example shown in the figure, the channel synchronization added with a pass in each of the two subcarriers along the frequency axis. In addition, the sync channel can be added to not only along the frequency axis, but also along the time axis, as shown in Fig. Anyway, since subcarriers, gene added channel synchronization can be allocated to the other signal, the volume of distribution channel synchronization can be limited to a minimum, so that the data transmission rate may be increased.

As indicated above, the nature of the distribution channel synchronization may vary depending on the supported hundredth of a frequency band or channel synchronization can be transmitted using the same frequency band around the center, regardless of the frequency band through which the mobile station communicates, as shown in Fig. In this case, as indicated in figure 10, the definition of the mobile station to the frequency band of the base station can be more complicated. However, from the viewpoint of the adjustment of the accuracy of determining cell regardless of the used frequency band, it is desirable that the frequency band, which is added to the sync channel, was total.

Fig depicts example, when the sync channel is transmitted using a bandwidth 5 MHz when using a band width equal to or exceeding 5 MHz, and the distribution channel synchronization varies depending on the frequency band, when the band width of less than 5 MHz. If you want the same accuracy honeycomb, even when among the frequency bands, which can be used, there are wide and narrow bandwidth is a concern, when using broad band of frequencies sufficient accuracy honeycomb cannot be achieved. The reason is that the configuration of the channel synchronization in the case of a wide band of frequencies is significantly different from the optimal. In this case, taking the configuration shown in Fig can be achieved and the accuracy of honeycomb, and the same accuracy for different cells.

The fourth option exercise

Fig depicts the configuration of the shared control channel, which differs from the variant shown in Fig.6. In the example on Fig the first frequency band 5 MHz, which is the Central, includes control information for all users and control information for users of the frequency band of 5 MHz. Control information for users of the frequency band 5 MHz, includes information about the center frequency, which reflects the ratio between the Central frequency fAand the Central frequency fA' band of frequencies that will be used. In the second frequency band, which on each side extends the first band of 2.5 MHz, is transmitted redundant information corresponding to the control information for all users and control information for users of the frequency band of 10 MHz. The specified redundant information is presented to the excessive bits, obtained according to different algorithms, error correction coding, which is performed on the control information. Control information for users of the frequency band of 10 MHz, includes information on the center frequency and other information for users of the frequency band of 10 MHz. In a third frequency band that extends from two sides of the second band of frequencies is transmitted control information and redundant information for all users, and control information for users of the frequency band of 10 MHz. By transmitting control data and similar to its distribution in accordance with the frequency bands used by the user can modify the transmitted content control channel according to, for example, the classes of the mobile station.

The fifth option exercise

Code scrambling, specific to the base station, can be applied to the control channel and the data channel transmitted from the base station, in addition to the sync channel. In this case, if the scrambling code is set independently for each frequency band used for communication, the process of decoding the control channel in the mobile station after the establishment of synchronization can become complicated. In the present embodiment, ktscrapbooklady is determined, using the entire two-dimensional code or part thereof, specified in the pre-period and in the entire region of the frequency band 20 MHz.

Fig shows an example of a scrambling code, which is multiplied by the control channel and other channels. In the example shown in the figure, first define a two-dimensional code, covering 40 subcarriers in frequency and 8 characters at a time. Adjacent symbols are shifted relative to each other in phase by one subcarriers along the frequency axis. When the base station transmits the control channel and other channels using the whole bandwidth of 20 MHz, the control channel is multiplied by with all the scrambling code and transmitted. When the base station uses only the frequency band of 5 MHz is used scrambling code that is displayed on the frequency band of 5 MHz, which includes the center frequency fA. When the base station uses only the frequency band of 10 MHz is used scrambling code that is displayed on the frequency band of 10 MHz, which includes the center frequency fA. Thus the mobile station can demodulate the control channel, without changing the code scrambling after the establishment of synchronization, to be able to easily connect to the downlink.

Two-dimensional code on the entire frequency band of 20 MHz and 8 characters may not have repeating structures is, shown in Fig. Fig depicts the case in which the two-dimensional code consists of a number of data sequences that do not have a repeating structure. When using such a two-dimensional code, you can get the same result as previously described.

The sixth option exercise

In the first embodiment, the minimum width of the frequency band used by the mobile station is 5 MHz, and the sync channel and the control channel are transmitted using the Central bandwidth of 5 MHz. However, the sync channel and the control channel may be transmitted using a frequency band with a width other than 5 MHz. In the example shown in Fig, the bandwidth that can be used by the mobile station, is 1.25 MHz and a Central frequency band of 1.25 MHz. Fig such pig in the fourth embodiment, but differs in that the minimum width of the Central band of 1.25 MHz. In addition, by combining the embodiments depicted in Fig and 19, the control channel may be transmitted using a bandwidth of 1.25 MHz and a Central frequency band 5 MHz. Respectively, can be achieved in the same conditions of mobile stations, at the same time providing the effect of a broad band of frequencies (improving the quality of the control channel, etc. for users using the band width of 5 MHz or more 5 MHz.

As above described the preferred embodiments of the present invention. However, the present invention is not limited to these options for implementation. In the framework of the presented invention can be produced variations and modifications. Although the present invention is described through several embodiments for convenience of presentation, classification on a separate embodiments of irrelevant, and as necessary may be used one or more embodiments.

The present application claims the priority of Japanese application No. 2005-174399, filed in the Japan patent office on June 14, 2005, the entire contents of which are incorporated in the description by reference.

1. The base station, which defines several types of bandwidth for use in a communication system containing
a transmission module, configured to transmit the transmitted data using the bandwidth from among several types of bandwidth in the frequency band centered at a predetermined center frequency; and
a multiplexing module, configured to multiplex the channel synchronization in a Central frequency band of predetermined width, VK is causou center frequency bandwidth, used in the module of the transfer, regardless of the bandwidth used in the transmission module.

2. The base station according to claim 1, characterized in that the module MUX multiplexes the channel synchronization only in the Central frequency band.

3. The base station according to claim 1 or 2, characterized in that the module multiplexing multiplexes in the Central frequency band control channel.

4. The base station according to claim 3, characterized in that the control channel multiplexity in multiplexing module, includes information to determine the bandwidth used in the transmission module.

5. The base station according to claim 1, wherein the transmission module uses bandwidth from certain types of bandwidth, where the number of these types is set to three or greater than three.

6. The base station according to claim 1, characterized in that several possible bandwidth that can be used in the module of the transfer, appropriately identified as the maximum bandwidth that can be used by the base station.

7. The base station, which defines several types of bandwidth for use in a communication system containing
a transmission module, configured to transfer data from the COI is whether the bandwidth from among several types of bandwidth in the frequency band, centered on a predetermined center frequency; and
a multiplexing module, configured to multiplex the control channel to the Central frequency band of predetermined width, comprising the Central frequency of a frequency band used in the module of the transfer, regardless of the bandwidth used in the transmission module.

8. The base station according to claim 7, characterized in that the module MUX multiplexes the control channel only in the Central frequency band.

9. The base station according to claim 7 or 8, characterized in that the control channel multiplexity in multiplexing module, includes information to determine the bandwidth used in the transmission module.

10. The base station according to claim 7, wherein the transmission module uses bandwidth from certain types of bandwidth, where the number of these types is set to three or greater than three.

11. The base station according to claim 7, characterized in that several possible bandwidth that can be used in the module of the transfer, appropriately identified as the maximum bandwidth that can be used by the base station.

12. The data transmission method, which identifies several types width Prosecutor for use in the communication system, including the steps, in which
transmit data to be transmitted in downlink using bandwidth from among several types of bandwidth in the frequency band centered at a predetermined center frequency; and
multiplexer channel synchronization in a Central frequency band of predetermined width, comprising the Central frequency of the band, regardless of bandwidth.

13. The method according to item 12, wherein the step of multiplexing multiplexer channel synchronization only in the Central frequency band.

14. The method according to item 12 or 13, characterized in that the step of multiplexing in the Central frequency band multiplexer the control channel.

15. The method according to 14, characterized in that the control channel, which multiplexer on the step of multiplexing includes information to determine the bandwidth used in the step of transfer.

16. The method according to item 12, wherein the step of transmitting uses bandwidth from certain types of bandwidth, where the number of these types is set to three or greater than three.

17. The method according to item 12, characterized in that several possible bandwidth that can be used in step transmission corresponding to about what atom defined as the maximum bandwidth, which can be used by the base station.

18. The data transmission method, which identifies several types of bandwidth for use in a communication system, comprising the steps, in which
transmit data to be transmitted in downlink using bandwidth from among several types of bandwidth in the frequency band centered at a predetermined center frequency; and
multiplexer the control channel to the Central frequency band of predetermined width, comprising the Central frequency of the band, regardless of bandwidth.

19. The method according to p, characterized in that the step of multiplexing multiplexer control channel only in the Central frequency band.

20. The method according to p or 19, characterized in that the control channel, which multiplexer on the step of multiplexing includes information to determine the bandwidth used in the step of transfer.

21. The method according to p, characterized in that in step transmission using bandwidth from certain types of bandwidth, where the number of these types is set to three or greater than three.

22. The method according to p, characterized in that several possible bandwidth that can be used on W the GE transmission, accordingly defined as the maximum bandwidth that can be used by the base station.

23. Communication system, which defines several types of bandwidth for use in this system, containing
a base station configured to transmit data transmitted using the bandwidth from among several types of bandwidth in the frequency band centered at a predetermined Central frequency, and with the possibility of multiplexing channel synchronization in a Central frequency band of predetermined width, comprising the center frequency of the bandwidth, regardless of the bandwidth; and
a mobile station configured to receive the sync channel from the base station to maintain synchronization with the base station, and capable of receiving data transmitted from the base station.

24. The system according to item 23, wherein the base station multiplexes the channel synchronization only in the Central frequency band.

25. The base station, which defines several types of bandwidth for use in a communication system containing
a transmission module, configured to transmit the transmitted data using the bandwidth castoris number of several types of bandwidth; and
a multiplexing module, configured to multiplex the channel synchronization in a Central frequency band of predetermined width, comprising the Central frequency of a frequency band used in the module of the transfer, regardless of the bandwidth used in the transmission module.

26. The base station A.25, characterized in that the module MUX multiplexes the channel synchronization only in the Central frequency band.

27. The base station, which defines several types of bandwidth for use in a communication system containing
a transmission module, configured to transmit the transmitted data using the bandwidth from among several types of bandwidth; and
a multiplexing module, configured to multiplex the control channel to the Central frequency band of predetermined width, comprising the Central frequency of a frequency band used in the module of the transfer, regardless of the bandwidth used in the transmission module.

28. The base station according to item 27, wherein the multiplexing module multiplexes the control channel only in the Central frequency band.



 

Same patents:

FIELD: information technology.

SUBSTANCE: RAKE receiver for mixed services based on code division multiple access broadband system includes a module (2) for high-speed reading/repeating antenna data, which transmits the control signal to a module (4) for controlling reading-recording antenna data twice within frame time; a module for controlling reading-recording antenna data, which speeds up frame transmission of delayed antenna data to a buffer module (6) for antenna data upon reception of the control signal; a module (5) for controlling multi-beam parameters, which transmits multi-beam parameters to the module (8) for multi-beam demodulation for controlling reading of antenna data in accordance with various types of services and controls a module (9) for generating scrambling and channel-forming codes jointly with a module (11) for controlling user parameters for generating corresponding scrambling and channel-forming codes needed for the multi-beam demodulation module (8); as well as a module (6) for buffering antenna data, which buffers delayed antenna data and accelerated antenna data are output after delay.

EFFECT: reducing use of resources.

10 cl, 8 dwg

FIELD: information technologies.

SUBSTANCE: to transfer messages changed from one information symbol to another, orthogonal code combinations are used, such as ensembles of discrete orthogonal signals generated by calculation of own numbers and own vectors of a diagonal positively determined symmetrical matrix, diagonal coefficients of which are chaotically generated numerical sequences.

EFFECT: increased structural security of information transfer system with code division of channels by using ensembles of orthogonal signals, which are chaotically generated on the basis of own vectors of the diagonal positively determined symmetrical matrix with N dimension.

3 dwg

FIELD: radio engineering.

SUBSTANCE: when encoding information, an ultra-wideband signal is used, consisting of nanosecond duration pulses described by a Gaussian function first-order derivative. The sequence of these pulses will include pulses following with a fixed period called ''reference" pulses, as well as pulses in between the reference pulses called "central" pulses. Logic "zero" or "one" encoding information will be contained in the time position of the "central" pulses relative "reference" pulses. These pulse delays are determined based on cepstrum processing and the time delays determined this way are then converted to a sequence of logic "zeroes" and "ones".

EFFECT: reliability of extracting information.

9 dwg

FIELD: information technology.

SUBSTANCE: slave base station (64) attains synchronisation with the reference base station (62) through messages transmitted from and received by a mobile station (60) either in the soft handoff region between the reference base station (62) and the slave base station (64) or within a range which allows the mobile station (60) to communicate with the slave base station (64). When the mobile station (60) is not in communication with both the reference base station (62) and the slave base station (64), then the round trip delay between the mobile station and the reference base station is measured by the reference base station (62). The reference base station (62) communicates the PN code used by the mobile station over the reverse link to the slave base station. The slave base station (64) acquires the signal from the mobile station (60) and determines when the signal from the mobile station arrives. The slave base station (64) then makes an estimate as to the length of the delay between transmission of a signal from the mobile station (60) to the slave base station (64)/ Based upon these measurements and estimates, the slave base station (64) determines the error which is present in the slave base station system time.

EFFECT: high synchronisation accuracy.

99 cl, 9 dwg

FIELD: information technologies.

SUBSTANCE: device to receive and send OFDM-signals with high noise immunity comprises a noiseless coder - interleaver, a symbol mapper, a unit of pilot channels formation, a unit of pseudorandom phase modulation of subcarriers, a unit to calculate reverse Fourier transformation, a unit to insert a protective interval, a unit of digital-to-analogue transformation, I/Q-modulator-frequency converter, a transmitting antenna, a receiving antenna, a unit to calculate noise-signal ratio, I/Q-demodulator-frequency converter, a unit of analogue-to-digital conversion, a unit to calculate direct Fourier transformation, a phase demodulator of subcarriers, a unit to assess and adjust channel parameters, a symbol demapper, a noiseless decoder-deinterleaver.

EFFECT: improved noise immunity.

3 dwg

FIELD: information technologies.

SUBSTANCE: method is carried out by development of a multi-channel serial Viterbi decoder, comprising the following functional units, interrelated to each other: an input buffer, a generator of a data word reading signal from the input buffer, a decoder of a data word command field, a unit of channel parameter registers, a unit to process a command "path metrics nullification", a unit to process a command "setting a value of the specified path metric", a unit to process a command "reading a bit from a path with the specified number", a unit to process a command "processing of input counts", a main memory of decoding paths and path metrics, a unit to generate a basic address of the main memory area of decoding paths and path metrics for the current decoding channel, a unit to generate an address of the main memory cell of decoding paths and path metrics and a unit of registers of decoding channels output data.

EFFECT: provision of the possibility to treat coded units of the final length for designs of the following types - terminated, truncated, circular ones.

3 cl, 3 dwg

FIELD: information technology.

SUBSTANCE: larger code space can be defined by introducing multiple code clusters within a sector, wherein each cluster has a unique scrambling code. Codes within a cluster can have orthogonal Walsh sequences that can be assigned to user devices to facilitate communicating over a wireless network and can overlap with codes in another cluster. The unique scrambling code assigned to each cluster can ensure that duplicate Walsh sequences in another cluster in the same sector appear as pseudo-noise codes.

EFFECT: high carrying capacity in WCDMA wireless network with limited codes.

35 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: transmitting device and system for transmitting information objects have a coder which includes a pre-coding unit (PCU), a modulator, a synchronous sequence addition unit (SAD), a multiplexer, a sampling buffer (SB), a packet formation unit (PFU), a control data generator (CDG), a control data coder (CDC), a sample number generator (SNG) and a coder address generator (CAG).

EFFECT: high rate of transmitting information objects.

25 cl, 4 dwg

FIELD: radio engineering.

SUBSTANCE: there is proposed transmitting and receiving devices providing improvement of signal quality in ascending and descending channels which perform simultaneous radio transmission and reception of various signals from the appropriate antennae of the variety of antennae. Devices include multiplexing means of pilot signal, which use one or more of the following methods: multiplexing method with separation as to time, multiplexing method with separation as to frequency and multiplexing method with code separation, for multiplexing of pilot channels subject to being transmitted and received from the appropriate antennae; data multiplexing means having the possibility of time multiplexing of pilot channels and data channels; and means for transmission of signal by means of at least one of the following methods: spatial division multiplexing method (SDM) and spatial time transmission deviation method (STTD).

EFFECT: improving signal quality in ascending and descending channels.

10 cl, 19 dwg

FIELD: information technologies.

SUBSTANCE: in system of communication with multistation access with orthogonal frequency division multiplexing, jointly used alarm channel may be used to provide alarm messages, confirmations of reception and adjustment of capacity to access terminals within the system limits. Assignment of previously specified number of subcarriers for jointly used alarm channel establishes fixed costs in pass band for channel. Actual subcarriers assigned for the channel may change periodically and may change according to the previously specified schedule of jump-liked frequency tuning. Value of signal capacity distributed to alarm channel may change symbol by symbol depending on requirements to capacity of communication channel. Jointly used alarm channel may send each message carried along the channel to one or more access terminals. Messages of one-address transfer make it possible to control channel capacity in compliance with the requirements of separate communication channels.

EFFECT: jointly used alarm channel may be assigned for a previously specified number of subcarriers within any cycle.

32 cl, 5 dwg

FIELD: radio engineering.

SUBSTANCE: suggested algorithm for quasi-coherent receipt of multi-beam signal with continuous pilot signal is based on algorithm, adaptive to freeze frequencies, for estimation of complex skirting curve, which uses both pilot and information signal. Use of information symbols for estimation of complex skirting curve allows, with weak pilot signal, to substantially increase precision of estimation of said curve and, as a result, significantly decrease possible error of information parameters estimation.

EFFECT: higher interference resistance.

2 cl, 10 dwg

FIELD: communications.

SUBSTANCE: system transmitter with orthogonal compaction with frequency separation sets in common standard array of linear block codes (n, k) a vector, capable of minimization of relation of pike and average powers, as leader of adjacent class and transfers sequence with minimal relation of pike and average powers by adding leader of adjacent class to n-digit code word, matching k-digit data, and forming vectors. Then receiver of system can easily restore source transferred signal with use of received vector syndrome, if receiver determines data, related to syndrome and leader of adjacent class.

EFFECT: higher efficiency.

6 cl, 5 dwg

FIELD: mobile communications.

SUBSTANCE: method includes setting a codes set having certain properties, consisting of Q-numbered code words having length M, including symbols from set of Q short codes. First property is, that none cyclic displacement of code word produces correct code word as a result. Other properties are presence of mutually unambiguous match between long code message and correct code word. In case of noise and interference decoder, at acceptable complication levels, provides for search of both random displacement (in such a way determining frame synchronizations) and transmitted code word (i.e. long code indication message related thereto).

EFFECT: higher efficiency.

5 cl, 22 dwg, 5 tbl

FIELD: communication systems.

SUBSTANCE: device has block for synchronizing clock speeds, input displacement register, commutator, intermediate storage register, memory block, comparison block, threshold block, record control block, count displacement register, reading control block, synchronization signals forming block, commutator, interference level measuring device, additional memory block, channels counter, communication channel.

EFFECT: higher interference resistance.

1 dwg

FIELD: radio engineering.

SUBSTANCE: implementation of soft decisions generating method in case of receiving multi-beam signal allows substantial decrease of complication level of receiver, because it contains lesser amount of one-beam receivers, than a prototype.

EFFECT: increased interference resistance and increased capacity of communications system during receiving of multiple-beam signal due to efficient periodic procedure of renewal of multiple-beam signal components when receiving estimates of components search, also considering mutual influence of signal components.

6 cl, 13 dwg

FIELD: communications engineering.

SUBSTANCE: proposed band selection method for mobile orthogonal frequency division multiple access communication system includes following steps to classify procedures of band selection between sending end and receiving ends with respect to original band selection process, passband width selection process, and periodic band selection process: determination of source band selection code (SC)number for source band selection process; SC number to request passband width for passband width request selection process and periodic SC number for periodic band selection process; determination of periodic SC deferment value in compliance with periodic SC number, and transmission of source SCs, passband width request SC, periodic SCs, and periodic SC deferment values on receiving ends.

EFFECT: minimized time for band selection access.

22 cl, 3 dwg, 4 tbl

FIELD: transmission of information, applicable in cellular and satellite communication systems.

SUBSTANCE: the receiver has two frequency converters, two quadrature correlators, phase error filter, controlled oscillator, two control elements, error delay filter, controlled clock oscillator, reference signal generator, two multipliers, two analog-to-digital converter, delay line, demodulator, decoder, two matched filters, phase shifter.

EFFECT: enhanced power efficiency of the communication system.

2 cl, 3 dwg

Deep paging method // 2260912

FIELD: communication systems.

SUBSTANCE: method includes forming paging channel message combined with Walsh series with length not less than 2m, which is then sent at data transfer speed below 480 bits per second. By transmitting message of paging channel at low data transfer speed and integration of gathered energy message can penetrate into buildings and other structures or environments with high level of fading.

EFFECT: higher efficiency.

4 cl, 6 dwg

FIELD: mobile telecommunication systems.

SUBSTANCE: base station receives information, pointing out presence on mobile station of information for transfer. Then, base station transmits information about state of use of physical channels and information about maximal allowed possible data transfer speed. Mobile station receives aforementioned data and transmits access header to base station to request given physical channel, determined on basis of aforementioned data.

EFFECT: higher stability, decreased number of errors during assignment of channel.

3 cl, 52 dwg, 8 tbl

FIELD: wireless duplex communications.

SUBSTANCE: sub-channels are set for physical random access channel in wireless duplex communication with temporal channels separation, in which multiple access is used with code separation of channels. Sub-channels transfer information between system users and system network. A row of radio channel frames has series of temporal ranges. For certain number of temporal row in a series each sub-channel of certain number of temporal range is uniquely set by one frame of radio channel from aforementioned row.

EFFECT: simplified network-level interface.

3 cl, 5 dwg

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