JP2002010332A - Radio communication system, channel connecting apparatus and transmitter-receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a communication system that allows an effective use of band and communication at a variety of transmission speeds. SOLUTION: An information sending side 101 receives sequential date row 103 from an upper level application. The data row 103 is divided into data elements 105 in accordance with required speed to be allocated to each low speed channel for transmission. The data elements 105 are received by a receiving side 102 to become data elements 106 respectively. Since the low speed channel is self-evident in the order of connection, received elements can easily be serialized even if there is a difference in delays or even if they are resent, thus a data row 104 that is similarly composed of the original signals being recovered. Only the required numbers of fine narrow band channel are obtained in accordance with an object of communication in a radio communication apparatus that uses narrow band channel in which a band to be used is divided into two or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication system, a line connection device, and a transmission / reception device for effectively using a band in a wide band radio communication in which a plurality of lines can be set.

[0002]

2. Description of the Related Art Conventionally, in wireless communication used for various applications, a bandwidth corresponding to an application to be applied is assumed in advance, and a channel having an appropriate bandwidth (e.g., FDMA) or a time division frame (T
Multiplexing is performed by providing a plurality of identification codes (CDMA), that is, DMAs and CSMAs, to meet these requirements.

In FDMA and CDMA, one line separated using one channel or one identification code is
This satisfies the communication required for one application to which the line is assigned. The bandwidth of one line is fixed, and the aim is to make effective use of radio resources by setting in consideration of efficiency by means of coding or modulation scheme.

[0004] In particular, multiplexing by CDMA can secure a plurality of lines temporally and simultaneously on one communication path using the same band. CDMA is a kind of spread spectrum communication (SS communication) system, which modulates a signal with an identification code (also referred to as a spread code or a pseudo-noise code), and observes a symbol in a transmission value sequence for a predetermined period. Line multiplexing is performed by demodulating the signal at a period in which the appearance probability matches the target identification code. For the identification code, it is necessary to use a code set having a sufficient distance between the appearance probabilities of the symbol positions constituting the code, such as M-sequence, Gold
For example, codes or Walsh codes are used.

[0005] TDMA is also a method used when the same terminal device establishes a plurality of line connections on the same communication path. The occupation of the communication path is divided into a desired number of multiplexes in units of time called slots. Multiplexing is performed by reserving a specific cyclic slot for the line for which connection has been requested.

As a method of time-dividing a communication path, there is a method of performing multiplexing using fixed-length or variable-length packets at an indefinite time instead of slots, and divides a plurality of data strings into fixed packets. Then, the data is transmitted alternately in the time direction. The generation of a packet is arbitrary, and there is no line (band) reserved on the communication path when there is no transmission signal. Instead of having no reservation, classification and reconstruction are performed by adding a predetermined destination code of the packet. In order to prevent a collision with another line, it is general to detect a carrier wave, which is called a CSMA system. Instead of removing the fixed time division rule of TDMA, it is necessary to transmit and receive data describing a packet configuration such as a destination.

In digital communication, in particular, digital encoding is performed once on a signal that takes an analog amount in both the information amount and the time direction, and higher-order encoding is represented as a numerical sequence regardless of the type of information. After dividing the code sequence into blocks regardless of the type, communication coding is performed in two stages by superimposing and combining the signal sequence including the control code for transmission, and multiple applications can be performed in a single channel with a sufficiently wide band. There are wireless communication systems that have a hierarchical implementation that allows them to be mixed. It replaces the wired data communication line mainly for computers, and uses IEEE 802.1
First-class systems.

[0008] A simple wireless telephone (PHS) is one of the wireless communication systems to which services are actually provided.
With the demand for high-speed communication, line multiplexed communication has been supplied on this system. In one method, the communication capacity (bandwidth) of one connection is obtained by using two slots at the same time in a time-division frame.
To double that to meet these high-speed demands. This communication technique does not use two independent radios, but extends the bandwidth occupation time of one radio.

In the same PHS system, there is also a means for securing a high-speed line using two radios. Using two telephones provided with independent calling codes, a connection mode is adopted in which the base station calls back the second line in response to the connection of the first line from the telephone side. In the PHS system, a dedicated slot is prepared for controlling the connection including the method described in the previous section.

In addition, regardless of the multiplexing method, the propagation state of the communication path in all wireless communications always changes due to the influence of the environment. Multiplexing of communication paths has been proposed in which only a poor communication path is transferred to another communication path.

[0011]

In the FDMA communication, one line secured in a channel unit occupies an excessively excessive bandwidth depending on the communication content, timing and data type of each session. However, it can only occupy a certain bandwidth at all times, and cannot effectively use radio wave resources. Also, in order to connect a plurality of lines, it is necessary to mount a plurality of wireless devices without fail, so that the mounting area becomes large, and the whole system becomes large and expensive.

In this point CDMA system, since the line is separated by the identification code, it can be expected to perform multiplexing using the high-frequency reception and modulation / demodulation portions of the radio equipment in common. In order to reduce the efficiency, a high-speed code tuning circuit and a high-speed computing unit for encoding / decoding are required. Also, the number of identification codes that can be set at the same time is smaller than the bit length allocated to the identification codes, and if it is desired to set a larger number of multiplexes, the code length becomes longer and the time transfer efficiency is reduced. Also, when multiple radios are installed in the same device, the lines are not separated by the physical quantity of frequency or time interval as in FDMA and TDMA. It becomes difficult.

In other words, these communications are based on the premise that terminals located at both ends of the line perform sufficient communications over a single transmission line, and a single connection secures a sufficient line for the main purpose of communication. Have been. This is because, at the stage of defining the communication system, the digital coding system determined depending on the type of information related to the main communication purpose has a dominant effect on the communication speed and the like. Furthermore, these do not comprehensively correspond to information types and coding methods that change from moment to moment, and do not attempt to make effective use of bandwidth by the type of transmission data that differs depending on the communication purpose and application that are often expanded, Further, even with the same data type, it does not flexibly cope with the emergence of a new information coding or compression method due to technological innovation.

On the other hand, in TDMA, multiplexing with a single radio can be realized, and low-cost and small-size mounting is possible. However, slots reserved for line connection even when there is no transmission information cannot be used for other lines, and transmission efficiency is high in communications where many types of transmitted information with different amounts of information are expected. Is extremely bad and does not contribute to the effective use of radio waves. Further, in order to obtain a constant effective value of the communication speed per line, a large number of time divisions cannot be obtained, and a high multiplexing efficiency cannot be expected.

Since CSMA is most suitable for performing multiplex communication on a single line like TDMA, installation of a plurality of lines by a plurality of connections is often found in wired communication which is physically restricted. In the wired communication, since the communication path is physically secured instead of being restricted by the additional connection, there is no interference with other communication. Therefore, the communication terminal can freely generate a call when there is information to be transmitted. However, in a wireless system without physical line separation, it is difficult to avoid coexistence with another communication system in the same communication path (bandwidth). In addition, similarly to TDMA, the radio frequency utilization efficiency is still poor because a wide band is occupied irrespective of the communication content in order to ensure a sufficient communication speed even after time division. Further, since the minimum transmission speed cannot be guaranteed by slot reservation or the like, it is basically not suitable for transmitting continuous information such as audio and video. In order to ensure immediacy and the number of multiplexes, it is necessary to improve the time division ratio by increasing the communication speed and fixing the packet length, but since the header information such as control signal and destination is always included in the packet, the unit is The speed efficiency per information also decreases, and the minimum packet length is thereby specified, so that the speed efficiency and the radio wave use efficiency also decrease.

A radio provided for high-speed communication or multiplexing communication for the purpose of combining and transmitting a plurality of data within one wireless connection at a time is used for stable reception of a wide band. Frequency characteristics and high-speed response are required.
Devices that implement these are often expensive and require state-of-the-art technology. In addition, mass production cannot be expected in terms of market and technology, and a universal system that can reliably meet demands at low cost has not been provided.

The use of a broadband wireless device itself can imitate a wired connection in multiplexing within the same type of connectable system, so that highly efficient transmission is possible. When modulation and coding schemes of other schemes are supplied, the occupation of the band also occurs, so that the use efficiency of radio wave resources is greatly impaired.

These wireless communications are often used in connection with wired communications. Especially in case of public access
As shown in (1), high-speed wired lines or high-output wireless broadcasting (lines) are allocated to the public backbone network that does not need to move, and radio is allocated to premises or home lines where frequent movements and topology changes are expected, and their effective use is made. Aim for. In this case, 701 in FIG.
As shown by, moving picture images and the like are transmitted using a broadband broadcast band. This is because if one broadband communication path is provided in the form of "broadcast", which receiver needs the video and when This is because it is also possible to respond. In a private line, it is not possible to expect the frequency of use that always requires this band, so it is desirable that the necessary receivers share the band when necessary. In addition, in the case of a public wired line, communication is performed in such a manner that the bandwidth is shared at any time on the public network side.For example, vector data and e-mail for drawing a graph have an extremely low bit rate and are used on the wired line side. It is extremely inefficient to secure the same bandwidth on the wireless side as it does, and it is only necessary to secure a line corresponding to the substantial data transfer speed on the wired line side.

The present invention has been made in view of the above circumstances, and has as its object to control a band occupied by a line connection and realize a radio communication system and a line connection device capable of realizing effective use of radio wave resources. And a transmission / reception device.

[0020]

SUMMARY OF THE INVENTION A radio communication system according to the present invention is a radio communication apparatus using a narrow band channel in which a band to be used is divided into a plurality of bands. , So that the above object is achieved.

In another wireless communication system according to the present invention, in a wireless communication apparatus that performs multiplex communication using a plurality of identification codes for a band to be used, a required number of codes is allocated or obtained according to a communication purpose. Thus, the above object is achieved.

In the above-mentioned wireless communication system, the line connection device according to the present invention automatically adjusts the number of available channels when the number of simultaneously operable channels included in the communication devices used by the paired line terminals differs. It is configured to establish a line connection in a predetermined manner, thereby achieving the above object.

A transmitting / receiving apparatus according to the present invention comprises: a data packet generator for dividing data received from an upper layer into a block size capable of being transmitted on a narrowband channel; a line multiplexing unit for distributing the obtained packet to a narrowband line; A multiplexing control unit for controlling a multiplexing line, wherein the multiplexing control unit performs a connection operation with a transceiver of a predetermined first channel when a connection request is issued from the upper layer, and As long as the other party can secure, the connection operation is repeated in order from the second channel onward to establish a multiplexed line,
Thereby, the above object is achieved.

Another transmission / reception apparatus according to the present invention allocates a stopped receiving section in response to a call from a communication line and receives a signal using a demultiplexing control section responding to a connection request and an ID of a connected channel. A line demultiplexer for reordering data packets and a data restoration unit for demultiplexing the permuted data packets to restore the original data. First, a response operation is performed by a transceiver of a predetermined first channel, and if a response is possible, the response operation is repeated in order from the second channel onward, and a response is made on a multiplexed line. Is achieved.

Still another transmitting / receiving apparatus according to the present invention includes a multiplexing control unit for limiting a subsequent multiplexing line connection operation by establishing an appropriate number of channels according to the type of a data stream received from an upper layer. This achieves the above object.

In one embodiment, after the line is established, a connection operation on the first channel is performed separately from the already-established multiplexed line by using an unused transmitting / receiving section to encode information from a plurality of higher layers. It is configured to be.

In one embodiment, a response operation is performed on the first channel separately from a multiplexed line that has already been established using an unused transceiver after the line is established, and information is decoded for a plurality of higher layers. It is configured to be.

In one embodiment, a line connection for performing multiplexing using an identification code in a single channel instead of the number of the plurality of channels is made possible.

In one embodiment, an identification code multiplexing control unit for controlling an identification code is provided in place of the multiplexing control unit, so that a multiplex line is established in multiplex communication using the identification code. Is performed.

In one embodiment, an identification code demultiplexing control unit for controlling an identification code is provided in place of the demultiplexing control unit, and a similar multiplexed line response is obtained on multiplexed communication using the identification code. Is configured to do so.

Still another transmission / reception apparatus according to the present invention is an identification code multiplexing control for limiting the subsequent multiplex line connection operation by assigning or obtaining the identification code in a single channel according to the type of a data string received from an upper layer. Part, whereby the above object is achieved.

In one embodiment, a plurality of connection operations are performed separately from a multiplexed line already in use by using an unused identification code after the line is established, and information from a plurality of higher layers is encoded and transmitted. It is configured as follows.

In one embodiment, a plurality of response operations are performed separately from a multiplexed line already in use by using an unused identification code after the line is established, and information from a plurality of higher layers is decoded. Is configured.

In one embodiment, only one or a small number of connections are held without releasing the line at the end of communication, so that the multiplex connection required at the time of reconnection is restored at high speed.

In one embodiment, even if the use band of the radio wave is approved or added as a plurality of discrete bands, communication is performed virtually as one band as an extension of narrow band communication within one band. It is configured as follows.

The operation of the present invention will be described below.

According to the present invention, an occupied bandwidth is obtained by constructing a communication path with a large number of sufficiently low-speed and inexpensive radios based on the FDMA or CDMA system, thereby always operating only a necessary number at the time of line connection. This is characterized in that the control is finely controlled to realize effective use of radio wave resources.

Also, by bundling an arbitrary number of narrow communication paths, a wireless communication with an extremely wide speed range is provided, and as a universal system which has no connection with the use of upper layers or the encoding method, a new code is adopted. It is characterized in that it can flexibly cope with the emergence of a generalization system, a compression system, or the emergence of a new application.

Further, the present invention divides the load on the communication speed by using a large number of wireless devices in parallel, and bundles and uses low-speed wireless devices that can be produced at low cost, thereby achieving the leading communication speed. Can be realized easily and reliably.

According to the first aspect of the present invention, in wireless communication provided for multipurpose communication with different types of data to be handled, a channel having a sufficiently narrow bandwidth with respect to the entire communication path when securing a line. Since a line is configured using a communication device including a large number of wireless devices each having a wireless communication device, line connection at an arbitrary speed can be easily realized. Since communication is protected by securing a wireless device, an increase in transmission information can be suppressed without requiring excessive destination information or the like.

According to the second aspect of the present invention, in communication provided for multipurpose communication with different data types to be handled, a code identification circuit which is sufficiently low-speed with respect to the entire communication path when a line is secured. Since a line is formed using a communication device having a large number of wireless devices, line connection at an arbitrary speed can be easily realized. Since communication is protected by securing an identification code, an increase in transmission information can be suppressed without requiring excessive destination information or the like.

These communications will be described with reference to FIG. On the information transmitting side (transmitting device) 101, a continuous data string 103 is transmitted from an upper layer application.
Receive. The data string 103 is decomposed into data pieces 105 according to the required speed, allocated to each low-speed line, and transmitted wirelessly. The data unit 105 is the receiving side 102
, And each becomes a data segment 106. Since the connection order of the low-speed line is obvious, the received segments can be easily permuted even if there is a delay difference or retransmission, so that the data sequence 104 assembled in the same manner as the original signal is restored on the receiving side. Communication is completed.

According to the third aspect of the present invention, in a communication system in which a large number of wireless devices are bundled to secure a line, the number of wireless devices held or used by systems located at both ends of the line are different. However, the best communication path can be ensured by using the available number of connections.

According to the fourth aspect of the present invention, in a wireless communication system that secures a line by bundling a large number of wireless devices, when a line is established, a connection operation is performed in order from a transceiver of a predetermined first channel. By repeating the above, the required number of connections can be reliably performed while sequentially checking the state of radio wave propagation and the possibility of connection. When a response from the other party cannot be obtained during the sequential connection, by stopping the connection operation, the state of the receiving side can be detected and the communication speed can be set without installing a control channel.

According to the fifth aspect of the present invention, in a wireless communication system in which a large number of wireless devices are bundled to secure a line, when a call is received, a response operation is repeated in order from the reception of the receiver with the smallest channel number. Thus, it is possible to surely establish the number of responsive connections while sequentially checking the state of radio wave propagation and the number required for the required communication speed.
Also, even if there is room in the receivable radio, the number of responses is automatically determined when the other party's call is completed, so the communication speed must be set according to the request of the transmitting side without installing a control channel. Can be done.

According to the sixth aspect of the present invention, in a wireless communication system in which a large number of wireless devices are bundled to secure a line, from a large-capacity data such as a moving image to a low-speed application such as a teletype, the upper layer By determining the number of wireless devices to be connected depending on the type of data to be received, it is possible to efficiently suppress wasteful bandwidth occupation and more effectively use radio wave resources. In other words, different communication speeds can be set for each session, and fine control can be performed according to the number of frequency division multiplex radios that operate the occupied bandwidth required for the communication speed.

According to the seventh aspect of the present invention, in a wireless communication system in which a large number of wireless devices are bundled to secure a line, if there is a wireless device not used for line connection, a new upper layer is separately provided. An independent line connection can be newly established, and a plurality of independent line connections can be supplied within the same terminal. In this case, the number of line connections to be supplied is arbitrary, and all the line connections are used without leaving excess wireless equipment at the maximum. In addition, it is possible to freely establish a line connection that makes full use of the capability of the wireless equipment included in the terminal.

According to the eighth aspect of the present invention, in a wireless communication system in which a large number of wireless devices are bundled to secure a line, if there is a wireless device that is not used for line connection, the other party currently communicating Alternatively, a new response operation and line connection can be newly performed on an upper layer corresponding to a new connection request from a communication terminal, and a plurality of independent line connections can be supplied within the same terminal. In this case, the number of line connections to be supplied is arbitrary, and all the line connections are used without leaving excess wireless equipment at the maximum. In addition, it is possible to freely establish a line connection that makes full use of the capability of the wireless equipment included in the terminal.

According to the ninth aspect of the present invention, in a wireless communication system in which a line is secured by using a large number of identification codes, the number of identification codes held or usable by systems located at both ends of the line is different. Even if it is, the best communication path can be secured by using the available number of connections. In this case, unlike the third aspect, the available number is not limited to the number of physical wireless devices mounted.

According to the tenth aspect of the present invention, in a wireless communication system for securing a line by using a large number of identification codes,
The necessary number of connections can be reliably established by performing the sequential connection operation in which the channels are replaced with call codes in the same manner as the line establishment procedure described in claim 4.

According to the eleventh aspect of the present invention, in a wireless communication system for securing a line by using a large number of identification codes,
By performing the sequential response operation in which the channel is replaced with the call code in the same manner as the line establishment procedure described in claim 5, it is possible to reliably establish the number of responsive connections.

According to the twelfth aspect of the present invention, in a wireless communication system for securing a line by using a large number of identification codes,
The number of wireless devices to be connected is determined depending on the type of data received from the upper layer as in the case of claim 6, so that the useless band occupation is efficiently suppressed and the radio wave resources are more effectively used. Can be used for That is, the communication speed can be set for each session, and the number of code multiplexes required for the communication speed can be finely controlled by the number of identification codes to be allocated.

According to the thirteenth aspect of the present invention, in a wireless communication system for securing a line by using a large number of identification codes, when there is an identification code not used for line connection,
A plurality of independent line connections can be supplied in the same terminal as in the case of the seventh aspect.

According to the fourteenth aspect of the present invention, in a wireless communication system that secures a line by using a large number of identification codes, when there is an identification code that is not used for line connection,
A plurality of response lines can be opened in the same terminal as in the case of the eighth aspect.

According to the fifteenth aspect of the present invention, when the line connection device according to the third or ninth aspect is supplying a line connection and the time when there is no data string to be delivered is relatively short, the speed is reduced. By temporarily reducing the number of connections, the communication path is surrendered to other communications, and the effective use of radio wave resources can be further enhanced. In this case, the ongoing line connection is not a line connection from the initial state, so the time used for the initialization procedure is eliminated, the multiplexed line is restored at an arbitrary time at high speed, and the communication delay is suppressed. It provides a dynamic line connection.

According to the sixteenth aspect of the present invention, even if the radio band provided for these communications increases, it behaves as if it were allocated as a continuous band expansion, thereby exchanging a line connection device and a new multilink. Providing wireless communication equipment with a future that makes it unnecessary to introduce procedures.

[0057]

(Embodiment 1) An example of a transmitting-side wireless device (transmitting device) according to the present invention will be described. The transmitting-side wireless device of the present embodiment is of a frequency multiplexing type using a narrow band channel obtained by dividing a band to be used into a plurality of bands, and is configured to secure a necessary narrow narrow band channel according to a communication purpose. I have.

Hereinafter, the configuration will be described with reference to FIG. 2 while describing a transmission method by the transmitting-side wireless device of the present embodiment. FIG. 2 shows the configuration of the transmitting-side wireless device.

First, the data to be transmitted obtained from the upper layer 201 is provided to the data decomposing unit 203. When data input from the upper layer is started, the data decomposing unit 203 measures the transmission amount and notifies the multiplexing control unit 202 of the required number of channels N _req . The multiplexing control unit 202 is a wireless device group 2
The connection operation is sequentially performed on 05 and 206 to obtain the number N of channels actually secured. The multiplexing control unit 202 returns the obtained N to the data decomposing unit 203, where the data decomposing unit 203 performs a decomposing operation of distributing the information obtained from the upper layer 201 to N channels. That is, in the data decomposing unit 203, the data received from the upper layer 201 is divided into a block size that can be transmitted by a narrowband channel, and becomes a plurality of data packets (data fragments). In the present specification, the data decomposing unit 203 is also called a data packet generating unit. The multiplexing control unit 202 for automatically determining the number of available channels and performing line connection is also referred to as a line connection device.

When performing the above disassembly operation, if the system has a sufficient communication speed, it is possible to assign a permutation number (ID) to a plurality of data packets.
If the permutation of the decomposed data is transmitted according to the order of channel connection connected by the multiplexing control unit, it is not necessary to add additional information such as permutation number to the data, and it is possible to prevent a decrease in the effective communication speed. The decomposed data unit is sent to a channel distribution unit (line multiplexing unit) 204, and further transmitted by the wireless unit 205 by driving the wireless unit 205 engaged in the line connection. Since the line connection is performed sequentially, some processing time is required.
May be provided with a buffer for holding data received from an upper layer during the line connection operation. Also, if N _req > N (1), if the data is information such as a moving image or a voice that requires continuous transmission, the shortage of the line is notified to the upper layer 201 as necessary to make a determination. Means may be provided, such as leaving the communication or automatically performing compression processing to the extent that the continuity is not impaired by appropriately thinning out information and continuing communication. If the data is information of irregular and irregular speed that does not require continuous transmission, it is possible to make the transmission of information uniform by using the buffer, shorten the non-delivery time, and improve the transmission efficiency.

Hereinafter, the procedure of the line connection performed by the data decomposing unit 203 and the multiplexing control unit 202 in conjunction with each other will be described in detail with reference to the flowchart of FIG.

When a connection request is received from the upper layer 201,
First, the number of channels used for line connection is checked (step S1). If there is a channel in use, a dynamic number is assigned to the unused channel with the highest number, which is virtually regarded as the first channel (step S2). The data from the upper layer 201 is read into a buffer inside the data decomposing unit 203 for a certain time (step S3). It is determined whether the data to be read has been completed (step S4). If the data has been completed, the process proceeds to an operation of releasing the connected N channel (steps S5 and S6), and the session is closed when the release loop ends. . On the other hand, if the data is not completed, the data being read is stored in the upper layer 2
It is determined whether or not it is the head of the data from 01 (step S7). If the data being read is the head, the required number of channels N _req is calculated (step S8).

The concept of the required number of channels will be described with reference to FIG. FIG. 8 shows an image 801 as continuous data and a discrete numerical sequence 802 such as graph data used by a computer. The continuous data is obtained as a sequence of partial data that completely fills a certain time as shown in the figure. The discrete numerical sequence is sampled for a certain period of time which is sufficiently longer than the data segment length, thereby obtaining a substantially average transmission speed. If a data decomposing unit having a sufficient operation amount is used, it is possible to calculate an accurate required transmission speed by repeating sampling time several times, or to mount an advanced prediction algorithm. The data segments obtained in the sampling buffer for a certain period of time are combined, and 803 and 804 in FIG.
As shown in (1), the channel bandwidth (the number of channels) corresponding to the data amount obtained by adding a necessary margin to the data element can be measured.

N _req = (measured value of arrival speed + margin) / communication speed of one wireless device The securing of channels is started with the number of channels N _req obtained by the formula (2) (step S 9). The n-th channel connection (step S10) is repeated from n = 1 to N _req, and the success or failure of each connection is confirmed (step S1).
1). This eliminates the need to establish a new protocol for acquiring the upper limit information of the number of channels by itself and exchanging data with the receiver when determining the number of channels. Thus, it is not necessary to provide a radio system dedicated to the system of the present invention, and it is possible to apply a conventional single-operation radio for a low-speed line, while installing a control channel and a radio dedicated to the control channel. Prevention does not increase waste of radio wave resources and equipment costs.

The determination as to whether or not connection can be made on the next channel (step S12) can be made by setting a timeout as in the sequence shown in FIG. FIG. 9 shows a case where the number of simultaneously operating channels of the communication devices used by the paired line terminations is different, more specifically, only the transmitting side 901 having the 5-channel radio and the 2-channel radio are provided. The sequence transition when the line connection of N _req = 3 is attempted in the connection operation of the receiving side 902 is shown. In accordance with the start of the line connection, the call of one channel is established and the call of two channels is established by expanding the loop L in the flowchart of FIG.
FIG. 9 shows a state in which the status is changed to "established", but no response is returned when calling three channels. There is no need for the receiver to recognize the call of the third channel at all, and if the available channel radios are exhausted, the receiver directly shifts to waiting for reception of the data body. If the calling of the three channels has failed for a certain period of time, a timeout occurs, the connection operation is cut off, and communication is started on the two channels allocated. As described above, the multiplexing control unit stops the connection operation when a response from the other party cannot be obtained during the sequential connection, and limits the subsequent multiplex line connection operation, thereby setting the control channel. And detects the state of the receiving side and sets the communication speed. In this case, the receiving side is set to use an individual wireless device having at least a function of returning a reception confirmation ACK.

In the example of the flowchart of FIG.
Temporary disturbance, jamming, and radio systems
Of channel gain due to transfer function in
Specific channels due to variations in sensitivity due to device mounting method
Channel, taking into account that
Skip to the maximum number of radios in the transmitter
_reqSteps of loop L aiming to secure
You.

After the end of the loop L, the number of times the operation of the loop L has been performed, that is, the actually obtained number n-1 of wireless devices is substituted for N (step S13), and data is transmitted to the wireless devices (step S14). To start. Thereafter, the data transmission operation is repeated until the disconnection request from the upper layer or the end of the transmission data, and after the end of the data is confirmed, the wireless device is released with the number of used channels N and the session is ended.

Hereinafter, an example of the wireless device (receiving device) on the receiving side will be described in detail with reference to FIG. The data input from the wireless device group 305 secured by N in accordance with the request from the transmitting side is rearranged by the channel merging unit (line demultiplexing unit) 304 using the ID of the connected channel, The data is sent to the assembling unit (data restoration unit) 303. The data assembling unit 303 receives the multiplexing information from the demultiplexing control unit 302, assembles the data so as to restore the original data by demultiplexing the permuted data packets, and transfers the data to the upper layer 301.

A procedure for responding to a request from the transmitting side will be described with reference to FIG. When entering the response waiting session, first, the demultiplexing control unit 302 investigates the communication currently being performed, allocates the smallest unused channel to the virtual first channel (step S51), and receives the call detection (step S51). 52) is started. When a call is detected, it is determined whether there is a call reception notification in order from the virtual first channel (step S53). If there is a call reception notification, the connection request is held in a buffer in the demultiplexing control unit 302. The above-mentioned virtual first channel is connected, and a response is made (step S54). The channel number is sequentially increased, and a channel without a call is skipped until a response by the n-th channel is skipped, and a call is detected up to the upper limit of the number of available wireless devices, that is, the operation of the loop L51 is repeated (steps S55 and S56). After the end of the loop L51, the loop L5
The number of times the operation 1 is performed, that is, the actually obtained number n-1 of wireless devices is substituted into N (step S57), and data from the wireless device is read into an internal buffer by the channel merging unit 304 (step S58). . About this operation, FIG.
As shown in (2), the process may be terminated with an available wireless device, but the loop L51 may be immediately terminated if a call on the next channel cannot be detected similarly to the transmitting side. Regardless of the method used, connection is not performed on a channel for which no ACK is returned to the transmitting side, so that both procedures may be mixed.

After the number of paging channels has been detected and the response connection operation has been completed, the receiving apparatus enters a reception standby state. When data is received, the data is output to the upper layer 301 (step S5).
Repeat step 9). Then, when the end of the data is detected, the operation of releasing the connected N channel (step S61,
The process proceeds to S62), and the session is closed when the release loop L52 ends.

FIG. 11 shows a state in which a wireless device setting one line in such a procedure tries to secure a line in response to a connection request from a new upper layer. When the channel group 1113 is being used by the request from the upper layer 1111 in the transmission-side wireless device 1101, a new upper layer 1112 is newly used.
Makes an inquiry to the data decomposing unit 1115 as to whether or not a new line can be secured. On the other hand, since the wireless device 1101 has three free channel wireless device groups 1114 from channel N + 1 to channel N + 3, virtual channels are allocated to these wireless device groups and the new wireless device 11
03 can be attempted. Of course, the wireless device 1101 can operate in a mixed manner not only as the transmitting side but also as the receiving side, and the correspondence between the channel and the upper layer is completely separated and processed in the data decomposing unit. It is also possible to realize two-way communication with this wireless device. Also, the wireless device 1101 is
02, and can also receive data from the wireless device 1103, and can be freely combined. In this case, since the channel N + 3 is still surplus, a new line connection can be expected to be supplied to a new upper layer 3 in addition to the upper layers 1111 and 1112.

As described above, according to the transmitting apparatus of the present invention,
Information from a plurality of upper layers can be encoded, and each piece of information can be communicated simultaneously with a plurality of wireless devices. According to the receiving apparatus of the present invention, communication is simultaneously performed with a plurality of wireless devices, and information is decoded for a plurality of upper layers.
/ Can be reproduced.

As described above, the wireless communication system according to the present invention includes the above-described transmitting device or receiving device, and is provided with a plurality of low-speed wireless devices, so that a narrow narrow band necessary for the communication purpose can be obtained. By allocating channels, it becomes possible to use radio resources more efficiently than a conventional wireless device having one broadband wireless device, and to install a flexible two-way wireless circuit topology.

(Embodiment 2) In the first embodiment, the paging channel is unnecessary in the radio apparatus, and any radio equipment on the transmission side can be connected to any radio equipment on the reception side as a virtual first channel. A possible transceiver for a wireless communication system has been described. In the present embodiment, an embodiment in which the transmitting and receiving apparatus of the first embodiment is applied to a frequency hopping scheme will be described.
The frequency hopping method is an application of the frequency multiplexing method (FDM), and is generally classified as a spread spectrum communication method.

FIG. 6 schematically shows the use status of each channel from the call to the communication in the multiplex connection when the frequency hopping method is adopted. As shown in FIG. 6, a virtual data channel of one channel is divided into slots of a fixed time length, and the channel to be transmitted is changed for each slot.
The actual channel that sends out each slot is determined by a pseudo-random number, and a pseudo-random number sequence that stochastically guarantees the occurrence of a collision to a certain value or less is adopted.

The detection of a call is performed by collision of two channels, and the hop 601 on the transmitting side changes as shown in the figure.
The reception detection hop 602 performs detection at the twelfth hop from the start of the call. At this time, if the hop pattern of the transmitting side is recognized, the transmitting side and the receiving side only need to adopt the same hop sequence, and communication can be executed by apparently occupying only one of the five channels. Since the collision probability is (1/5) × (1/5) = 1/25 (3) in the case of 5 channels, it is possible to detect a collision during an average of 25 slots. If the detected hops are fixed to a known periodic hop sequence, it is possible to conversely improve the probability of collision in the paging operation, and it is expected to improve the efficiency. As an inexpensive low-speed wireless device in which communication by this frequency hopping is built in an individual wireless device, Bluetooth
(Bluetooth) and the like, and if these systems are combined with the present invention, a high-efficiency wireless communication system that does not require a control channel can be easily realized at low cost.

Third Embodiment As a third embodiment, an example will be described in which the transmitting / receiving apparatus of the first embodiment is applied to an identification code multiplexing communication system in which multiplex communication is performed using a plurality of identification codes in a band to be used. I do. FIG. 10 illustrates the state of the signal.
Fig. 4 shows a paging operation without a control channel in a code multiplexing system.

The signal 1001 after being subjected to code modulation is affected by channel noise 1002 which is the sum of channel noise and multiplexing with other channels during transmission through the radio channel, and
When it reaches the receiver, it is received as a signal having a shape like 1003. The paging channel is detected using a signal obtained by modulating a continuous signal that always takes a positive value as an original signal, that is, a signal in which an identification code is continuously transmitted. The receiving side attempts phase tuning in parallel for all existing in the communication path or all partial identification codes of the receiver. In the case of FIG. 10, a communication path to which identification codes 1, 2, and 3 are given is illustrated, and an output curve of a signal distance (similarity) at a position where the phase tuner is locked is represented by 1004, 100 for identification code 2
7, reference numeral 1010 denotes the identification code. These two
By shaping by value conversion and the like, and by obtaining a periodicity score, it is possible to detect which identification code is used for calling. Here, the identification code 2 shown in 1009
Indicates that the periodicity score of is accumulated by the shaped tuning signal indicated by 1008, and 1
No detection is possible in 006 and 1012. In the transmitting device, the identification code is controlled by an identification code multiplexing control unit corresponding to the multiplexing control unit in FIG. In the receiving apparatus, the identification code is controlled by an inverse identification code multiplexing control unit corresponding to the demultiplexing control unit in FIG.

As described above, by allocating or acquiring the required number of codes according to the purpose of communication, line connection without a control channel is possible even in code multiplexing communication. After that, if the ordinary code multiplexing communication is performed by the pair of the handled code modulator and the code demodulator, a flexible wireless communication system in which a large number of low-speed lines are bundled just like the frequency multiplexing method shown in the first embodiment. Can be provided.

Further, according to the above communication system, as shown in FIG. 12, it is possible to cope with a case where a specific radio device is to be called in calling. A call code assigned to the wireless device is prepared in advance by eliminating duplication, and a call operation is performed using a code obtained by modulating this call code with an identification code, and a tuning detection signal 1008 (FIG. 10) is generated for a long time. This can be realized by making a response when forming a periodic sequence of the call codes. Since such a method is not a special one but a general code multiplex communication, it can be easily realized.

[0081]

According to the present invention, by using a large number of low-speed connections at the same time, dividing communications into low-speed connection units and securing an arbitrary band in the direction of the number of connections, the conventional fixed bandwidth occupation is achieved. Fine-grained control that makes communication that has been performed more efficient can be performed.

The present invention also makes it possible to dynamically change the line width to be secured according to the contents of communication and the type of transmission data required from the upper layer, thereby eliminating unnecessary bandwidth occupation. Simultaneously, it is possible to provide communication on the same wireless device even for unknown data requiring high-speed transmission that is considered to appear later, if the band of the used radio wave is given over a plurality of discrete bands Even in such a case, a wireless facility that has high scalability in the future, including the point that it can be virtually handled as one band, is provided.

Further, according to the present invention, the resources provided by the wireless device are effectively used without leaving any excess, and the remaining wireless devices excluding the wireless devices already engaged in communication are subdivided into necessary portions for line connection. To realize a highly flexible wireless communication device corresponding to a multi-application that is allocated and operates in a terminal.
In addition, a platform is provided that can implement two-way communication or even multiple two-way communication within a single wireless device.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing multiplexing by a low-speed connection;

FIG. 2 is a diagram showing a configuration of a transmitting-side wireless device employing multiplexing by band division according to the present invention;

FIG. 3 is a diagram showing a configuration of a receiving-side wireless device employing multiplexing by band division according to the present invention;

FIG. 4 is a diagram showing a procedure for generating a line connection for securing a plurality of low-speed connections according to the present invention;

FIG. 5 is a diagram showing a procedure for responding to a call of a line connection for securing a plurality of low-speed connections according to the present invention.

FIG. 6 is a diagram schematically showing a use state of each channel from a call to a communication in connection in frequency multiplexing when frequency hopping is adopted.

FIG. 7 is a diagram schematically showing an application example of connecting to a public network such as a broadcast or a wire using narrowband wireless communication by the wireless communication system of the present invention.

FIG. 8 is a diagram illustrating an example of determining the number of channels to be allocated according to the type of transmission data from an upper layer.

FIG. 9 is a diagram showing a state of a call response exchange up to a line connection in a sequence chart.

FIG. 10 is a diagram showing a paging operation without a control channel in the code multiplexing system in order while showing signal states;

FIG. 11 is a diagram illustrating a state in which two line connections are arranged in parallel for two upper layer applications of one wireless terminal device;

FIG. 12 is a diagram showing an example in which a specific call code is expressed using an identification code

[Explanation of symbols]

 101 Wireless device on the transmitting side 102 Wireless device on the receiving side 103 Transmitted data sequence 104 Received data sequence 105 Divided data unit 106 Assembly data unit 201 Transmitting application executing unit 202 Multiplexing control unit 203 Data decomposing unit 204 Channel distribution unit 205 Transmitting side Wireless device group 206 Transmitting free wireless device group 301 Receiving side application execution unit 302 Demultiplexing unit, 303 Data assembling unit 304 Channel merging unit 305 Receiving wireless device group 306 Receiving free wireless device group 601 Transmitting hop 602 Receiving side Hop 701 Broadcast radio wave 702 Public line 703 Virtual broadcast relay line 704 Virtual data line 801 Video data 802 Discrete numerical sequence 803 Video data unit 804 Discrete numerical sequence unit 901 Transmitting side 902 Receiving side 1001 Original signal 1002 Channel noise 100 3 paging reception signal 1004 similarity curve of identification code 1 1005 binarization shaped tuning signal of identification signal 1 1006 periodicity score of identification signal 1 1007 similarity curve of identification code 2 1008 binary shaped tuning signal of identification signal 2 1009 Periodicity score of identification signal 2 1010 Similarity curve of identification code 3 1011 Binary shaping tuning signal of identification signal 3 1012 Periodicity score of identification signal 3 111 Multi-connection side wireless device 1102 Single connection side wireless device 1103 New connection Wireless device 1111 Upper layer 1 1112 Upper layer 2 1113 In-use wireless device group 1114 Virtual channel wireless device group 1121 Single connection wireless device side upper layer 1 1122 Single connection wireless device side wireless device group 1131 New connection wireless device side upper layer 2 1201 Calling code 1202 Identification code

Claims (16)

[Claims] 1. A wireless communication apparatus using a narrow band channel obtained by dividing a band to be used into a plurality of bands, the wireless communication apparatus being configured to secure a required number of narrow narrow band channels according to a communication purpose. system. 2. A wireless communication apparatus for performing multiplex communication using a plurality of identification codes for a band to be used, wherein the wireless communication apparatus is configured to allocate or acquire a required number of codes according to a communication purpose. Communications system. 3. In the wireless communication system according to claim 1, when the number of simultaneously operable channels included in a communication device used by a pair of line terminations differs, the number of available channels is automatically determined. A line connection device that determines the line connection. 4. A data packet generating section for dividing data received from an upper layer into a block size capable of being transmitted on a narrowband channel, a line multiplexing section for distributing the obtained packets to a narrowband line, and controlling the multiplexed line. A multiplexing control unit that performs a connection operation with a transceiver of a predetermined first channel when a connection request is issued from the upper layer, as long as a communication partner can be secured. A transmission / reception apparatus configured to repeat a connection operation in order from a second channel and thereafter to establish a multiplexed line. 5. A demultiplexing control unit for allocating a stopped receiving unit in response to a call from a communication line and responding to a connection request, and a line for rearranging data packets received using an ID of a connected channel. A demultiplexing unit; and a data restoring unit for demultiplexing the permuted data packets to restore the original data, wherein the demultiplexing control unit first receives a predetermined first packet from a communication partner device. A transmission / reception device configured to perform a response operation by a transmitter / receiver of a channel, and repeat a response operation in order from the second channel onward if a response is possible, to perform a response on a multiplex line. 6. A transmission / reception apparatus comprising a multiplexing control unit for limiting a subsequent multiplexing line connection operation by establishing an appropriate number of channels according to a type of a data stream received from an upper layer. 7. A connection operation on a first channel is performed separately from a multiplexed line already established by using an unused transmitting / receiving section after the line is established, and information from a plurality of higher layers is encoded. The transmitting / receiving device according to claim 6, wherein the transmitting / receiving device is configured. 8. A response operation in a first channel is performed separately from a multiplexed line already established using an unused transceiver after the line is established, and information is decoded for a plurality of higher layers. The transmission / reception device according to claim 6, wherein the transmission / reception device is configured as follows. 9. The line connection device according to claim 3, wherein a line connection for performing multiplexing using an identification code in a single channel instead of the number of the plurality of channels is configured to be possible. . 10. An identification code multiplexing control unit for controlling an identification code instead of the multiplexing control unit, whereby a multiplex line is established in multiplex communication using the identification code. The transmission / reception device according to claim 4. 11. An identification code demultiplexing control unit for controlling an identification code instead of the demultiplexing control unit, and a similar multiplex line response is performed on multiplex communication using the identification code. The transmitting / receiving device according to claim 5, wherein the transmitting / receiving device is configured. 12. A transmission / reception apparatus comprising an identification code multiplexing control unit for limiting the subsequent multiplex line connection operation by assigning or acquiring an identification code in a single channel according to the type of a data string received from an upper layer. 13. A configuration in which a plurality of connection operations are performed separately from a multiplex line already in use by using an unused identification code after the line is established, and information from a plurality of upper layers is encoded and transmitted. The transmission / reception device according to claim 12, wherein 14. A system in which a plurality of response operations are performed separately from a multiplex line already in use by using an unused identification code after the line is established, and information from a plurality of higher layers is decoded. The transmission / reception device according to claim 12, wherein 15. The multiplexed connection required at the time of reconnection is restored at a high speed by holding only one or a few connections without releasing the line at the end of communication. The line connection device according to 1. 16. Even if a band used by a radio wave is approved or added as a plurality of discrete bands, communication is performed virtually as one band as an extension of narrow-band communication within one band. The line connection device according to claim 3, wherein the connection is performed.