JP2003143651A - Broad band mobile access system, wireless base station and wireless terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broad band mobile access system that can enhance communication efficiency and reduce power consumption by totalizing or selectively utilizing different frequency bands in a wireless communication between a wireless base station and a terminal. SOLUTION: The wireless base station and the terminal respectively have a first wireless unit using a first frequency band to make wireless communication and a second wireless unit using a second frequency band to make wireless communication. Prior to transmission of user information from the wireless base station to the terminal by using the second wireless unit, the first wireless unit of the wireless base station transmits wireless parameter information used for transmission of the user information and the terminal controls reception of the user information by the second wireless unit of the terminal on the basis of the wireless parameter information received by the first wireless unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadband mobile access system which is composed of a radio base station, a communication network, and a mobile terminal and is used as an access line when performing broadband data communication from a mobile terminal. More specifically, the present invention relates to wideband mobile access systems suitable for HiSWAN wireless systems using multiple frequency bands.

[0002]

2. Description of the Related Art In recent years, with advances in wireless modulation / demodulation technology, network control technology, wireless devices and the like, mobile phones and PHS (Persona) capable of making voice calls even when out of the office.
l Handy phone System) etc. are rapidly spreading. A mobile phone can make a call even while moving at high speed by train, and can make a call not only in the city but also in a wide range such as a suburb, a depopulated area, or a building. On the other hand, P
HS has the disadvantages that calls during movement tend to be interrupted and that it is inconvenient to use in the suburbs where the communication area is relatively small and there are no base stations nearby, but it is a communication for data communication. Regarding speed, it has the advantage of being faster than mobile phones. The difference in such functions and performances depending on the wireless communication system is that the specifications are different due to the difference in the original system usage concept.

As described above, since the plurality of wireless communication systems have different functions and performances, the terminal functions of the respective wireless communication systems are changed so that the plurality of wireless communication systems can be selectively used according to the purpose. A dual-mode terminal housed in one portable housing has been developed.
This dual mode terminal has, for example, a mobile phone and PHS terminal function. A user with this dual-mode terminal has both a mobile phone and a PHS in a standby state to receive a call that is placed on either side, or to have a terminal function that enables high-quality communication at the place where the call was made. Only selecting one of the two terminal functions, such as selecting and transmitting, allows communication. As a result, there is a problem in that the line for downloading cannot be switched to PHS even if the user enters a PHS service area where high-speed data communication can be performed while downloading data from a server using a mobile phone.

As another conventional example of a wireless communication system using a plurality of wireless communication systems in one terminal, IEICE Technical Report NS2001-89 "Development of wireless control in hybrid MMAC system" (Sakamoto Takefumi et al., 2001) Hybrid MMAC (Multi-media Mobile Ac)
cess Communication) system is being developed. As shown in FIG. 12, this system includes a radio base station 100-3 equipped with a HiSWANa system transmitter standardized as ARIB-T70 and an existing PHS base station 10.
0-7, communication network 100-1, and HiSWA
The hybrid terminal 100-4 is equipped with a Na system receiver and a PHS terminal.

The HiSWANa system uses a 5 GHz band, which is a higher frequency band than the 1.9 GHz band used in PHS. The maximum transmission speed is 54 Mbps, which enables wider band transmission than PHS. On the other hand, since the attenuation of radio propagation at 5 GHz is large compared to the 1.9 GHz band and it is necessary to transmit power in a wide band, the power consumption of the transmitter becomes extremely large compared to PHS.

[0006] In view of this, in the hybrid MMAC system, with respect to a terminal that needs to be miniaturized, a HiSWANa radio device is provided with only a receiver without a transmitter. According to the HiSWANa standard, a control message is exchanged between the wireless base station and the terminal every time there is a communication request from the terminal that has completed the association with the wireless base station, and the wireless line connection is set up. .

As described above, in the hybrid MMAC system, since the terminal does not have a HiSWANa radio transmitter, the downlink HiSWANa from the wireless base station to the terminal is not provided.
In order to set the connection of the wireless link 100-6, a control message such as a connection setting request and various parameters is sent from the terminal to the PHS wireless line 100-5.
And it is necessary to transmit to the wireless base station 100-3 via the communication network 100-1. In this case, there is a problem that the procedure used for exchanging the control message for setting the connection becomes complicated.

[0008]

In a system in which a terminal is equipped with radios of a plurality of frequency bands and each controls independently, the radios that perform communication are connected depending on the respective line states. There is a problem that it cannot be switched on the way.

Further, in a wireless system using a terminal having a narrow band wireless transmitter / receiver and a wide band wireless receiver each having a different frequency band without mounting a wide band wireless transmitter to reduce the power consumption of the terminal. However, there is a problem that the procedure used for exchanging control messages for connection setting becomes complicated.

The present invention has been made in view of the above circumstances, and improves or improves the communication efficiency and power consumption by using different frequency bands in a wireless communication between a wireless base station and a terminal, either collectively or selectively. It is an object of the present invention to provide a broadband mobile access system with a reduced size.

[0011]

A broadband mobile access system according to the present invention is a broadband mobile access system for performing wireless communication between a radio base station and a terminal, wherein the radio base station and the terminal have a first frequency band. And a second wireless device for wireless communication using a second frequency band that is higher than the first frequency band. Prior to transmitting user information to the terminal using the second wireless device, the wireless parameter information used for transmitting the user information is transferred from the first wireless device of the wireless base station to the first wireless device of the terminal. To the wireless device, the terminal receives the wireless parameter information by the first wireless device, based on the wireless parameter information received by the first wireless device, by the second wireless device A user To receive the broadcast.

(Operation) With the configuration described above, the broadband mobile access system according to the present invention transmits the user information from the radio base station to the terminal, and the characteristics of the user information and the characteristics of each of the plurality of radio lines. It is possible to provide a broadband mobile access system capable of flexibly selecting a line to be used according to the state. In addition, in order to save power of the terminal, a wideband wireless transmitter is not installed, and a connection setting in a wireless system using a terminal including a narrowband wireless transceiver and a wideband wireless receiver having different frequency bands is provided. The procedure of message transfer can be simplified.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram schematically showing the overall configuration of a broadband mobile access system according to the first embodiment of the present invention. The wireless base station 1-3 shown in the figure is connected to a communication network 1-1 such as an IP router network,
The user information is transferred from the server device 1-2 to the user terminal 1-4 via the wireless line 1-5 or 1-6. The first wireless line 1-5 is, for example, the HiSW described above.
This is a wireless line that carries out the ANa method transmission by wireless in the 5 GHz band. The second wireless line 1-6 is, for example, a wireless line (herein referred to as HiSWANb) that performs transmission similar to the HiSWANa system by radio in the 25 GHz band.

In general, the higher the radio frequency band is, the wider the wireless transmission can be performed. For this reason, HiSWA in the 25 GHz band is better than HiSWANa in the 5 GHz band.
Nb enables higher speed transmission. For example, H
While iSWANa has a maximum transmission rate of 54 Mbps, HiSWANb enables a transmission rate of 216 Mbps by combining four wireless transmissions of the same method as HiSWANa.

FIG. 2 shows the configuration of a radio base station used in the broadband mobile access system according to the first embodiment of the present invention. The wireless base station 2-1 includes a control device 2-2 for connecting / disconnecting wireless lines and managing terminals, a terminal management table 2-3 for storing information for managing terminals, and communication such as an IP router network. A network interface 2-4 for connecting to a network and a radio access for instructing a slot position etc. to a transmitting radio (2-6 or 2-7 in this case) when transmitting user information from a radio base station. A control means 2-5, a first radio 2-6,
A second wireless device 2-7 that performs wireless communication in a frequency band higher than that of the first wireless device, and antenna devices 2-8 and 2 connected to the respective wireless devices (2-6 or 2-7). −
It is composed of 9 and 9.

FIG. 3 shows the configuration of a terminal used in the broadband mobile access system according to the first embodiment of the present invention. As shown in the figure, the terminal 3-1 displays an image and video information, and a control device 3-2 that performs connection / release of a wireless line, interpretation of key input information, processing of received information, and the like. Display means 3-3, a key input means 3-4 for a user to input a command or data, a storage means 3-10 for temporarily holding user information received via a wireless line, and a user When receiving information and the like from the wireless base station 2-1, a wireless access control unit 3-5 for instructing a wireless device (here, 3-6 or 3-7) performing a receiving operation, such as a slot position, The first wireless device 3-6, the second wireless device 3-7 that performs wireless communication in a higher frequency band than the first wireless device, and the respective wireless devices (3-6 or 3-).
7) connected to the antenna device 3-8 and 3-9.

FIG. 4 shows an example of the basic structure of a radio communication frame applied to the broadband mobile access system according to the present invention. The basic configuration of the wireless communication frame will be described by taking a case where wireless communication is performed between the wireless base station 2-1 and the terminal 3-1 as an example. That is, in the wireless base station 2-1 shown in FIG. 2, the wireless access control means 2-5 controls so that communication is performed using only the first wireless device 2-6.
On the other hand, in the terminal 3-1 shown in FIG. 3, the wireless access control means 3-5 controls so that communication is performed using only the first wireless device 3-6.

Assume that, for example, three terminals (A to C) are associated in the radio base station 2-1. At the beginning of the frame period, a common broadcast channel 4-1 is provided for broadcasting control information that commonly transmits system configuration information to all terminals. This common broadcast channel 4-1 is followed by a downlink dedicated control channel 4-2 for transmitting / receiving control information individually exchanged with each terminal.
And an uplink individual control channel 4-3 is provided.

For the downlink dedicated control channel 4-2 from the radio base station 2-1 to the terminal 3-1, the slot position is statically (fixed) for each terminal associated with the radio base station 2-1. Method) and a method of allocating a slot for each frame only to a terminal having control information to be transmitted. In the present invention, either method may be used, and the slot of the downlink dedicated control channel 4-2 may be used. It is not limited to a particular location assignment method. Terminal 3-
1 to the uplink individual control channel 4 addressed to the radio base station 2-1
Similarly, for -3, a method of statically (fixedly) determining the slot position for each terminal associated with the radio base station 2-1 and a method in which a terminal having control information data to be transmitted is random Although there is a method of accessing, either method may be used in the present invention. The slot position of the uplink dedicated control channel 4-3 is not limited to a particular allocation method.

In FIG. 4, an uplink individual control channel 4-
In the user channel 4-4 subsequent to 3, the terminal is assigned to each type of fixed length slot unit. The present invention does not particularly limit the allocation unit, the method of determining the allocation, the arrangement of the downlink user information and the uplink user information, and these are appropriately determined according to the embodiment.

Radio parameter information for designating the slot position of the user channel assigned to each terminal, the number of assigned slots, the modulation scheme of the user channel, the coding rate of error correction, etc. is transmitted from the radio base station 2-1. It is transmitted to each terminal using the individual control channel 4-2. Each terminal 3-1 receives the wireless parameter information addressed to itself by the first wireless device 3-6. The wireless access control means 3-5 analyzes the wireless parameter information. When it is detected that the user information addressed to the own terminal is sent, the wireless access control means 3-5
The first wireless device 3-6 is instructed to receive the user information according to the wireless parameter.

FIG. 5 is applied to another example of the radio communication frame applied to the broadband mobile access system according to the present invention, that is, when the radios of two frequency bands are jointly used for radio communication. An example of a wireless communication frame is shown. The frame structure related to communication using the first frequency band is the same as that shown in FIG.

Regarding the second frequency band, transmission is performed using two radio carriers in this example. FIG. 10 shows a configuration of a wireless base station for realizing this, and FIG. 11 shows a configuration of a terminal. As shown in FIG. 10, two second wireless devices 10-7 are provided. Further, a directional coupler and a distributor 10- for appropriately inputting and outputting a radio signal between these two second radios and the antenna 10-9.
10 is provided. Other configurations are similar to those shown in FIG. On the other hand, the same applies to the terminal, and two second wireless devices 11-7 are provided. Further, a directional coupler and a distributor 11-11 for appropriately inputting / outputting a wireless communication signal between the two second wireless devices 11-7 and the antenna 11-9 are provided.

Returning to FIG. Common broadcast channels 5-5 and 5-9 for broadcasting control information commonly transmitted to all terminals such as system configuration information are provided at the beginning of the frame period in the second frequency band. If the two frames in the second frequency band have the same phase and cycle and are synchronized,
The configuration may be such that only one of the common broadcast channels 5-5 or 5-9 is provided.

If the period of the frame of the first frequency band and the frame of the second frequency band are the same, the individual control channel in the frame of the first frequency band and the frame of the second frequency band are Since the correspondence with a certain user channel does not change with time, there is an advantage that the calculation of the slot allocation of the user information becomes easy. Further, if the same clock source is used, the time required for clock synchronization when performing burst reception by the second wireless device can be shortened.

In this embodiment, the wireless access control means 1
0-5 and 11-5 are the first radios 10-6 and 11-6.
And the second radios 10-7 and 11-7 are jointly used. Particularly, in the present embodiment, in such control, the second wireless devices 10-7 and 11-7 exchange control information (wireless parameters) for communication using the second frequency band with the second wireless device. Machines 10-7, 11-
Instead of 7, the first wireless devices 10-6 and 11-6 are used. For this reason, in FIG. 5, dedicated control channels 5-6, 5-7, 5-for transmitting and receiving control information to and from each terminal after the common broadcast channel are transmitted and received.
In principle, 10 and 5-11 are not required. But,
The field of the dedicated control channel may be exceptionally provided for the reason of using a common frame format for coexistence with a terminal equipped with only the radio device of the second frequency band.
The user channels 5-8 and 5-12 are assigned to each terminal in units of some types of fixed-length slots. In the present invention, the assignment unit, the assignment determination method, the downlink user information, and the uplink user information are assigned. Any method may be used for arrangement and the like. Radio parameter information such as the carrier frequency of the user channel assigned to each terminal, the position of the slot and the number of assigned slots, the modulation scheme of the user channel, the coding rate of error correction, etc., is transmitted from the radio base station to the downlink dedicated control channel 5-2 Will be sent to each terminal. Each terminal 11-1 receives the wireless parameter information addressed to itself by the first wireless device 11-6. The wireless access control means 11-5 analyzes the wireless parameter information. Thus, when it is detected that the user information addressed to the own terminal is sent, the first wireless device 11-6 or the second wireless device 11-7 is appropriately sent to the first wireless device 11-6 or the second wireless device 11-7 based on the wireless parameter. And instruct to receive the user information.

According to the broadband mobile access system of the present embodiment configured as described above, for example, when the user downloads a large amount of data from a server on the Internet, the second device installed in the terminal 11-1. The wireless device of 1 only needs to receive the slot in which the user information addressed to the user is transmitted in the user channel, and the first wireless device 11-6 can be used for all transmission and reception of the control channel. That is, the time for operating the second wireless device 11-7 that uses a high wireless frequency band can be shortened as much as possible, and high-speed download can be realized while suppressing an increase in power consumption. In particular, if the configuration is such that all of the uplink control information and user information are transmitted by the first wireless device 3-6, the terminal 11-1 will operate as the second wireless device 11-.
It becomes unnecessary to provide the transmission function in 7. This eliminates the need to mount a power amplifier for high radio frequency, which consumes a large amount of power and generates heat. Therefore, the size of the terminal 11-1 can be reduced in combination with the downsizing of the battery.
It becomes possible to reduce the weight.

In the above description, regarding the communication frame configuration of the first radio device 11-6 and the second radio device 11-7, the up / down control information and user information are time-divided for each radio carrier frequency. Although an example of multiplexing is shown, various other methods are also applied to the division of radio resources. For example, when the user channels are multiplexed with respective spreading codes, the downlink dedicated control channel 5-2 may be used to notify the spreading codes for transmission to the terminal on the user channel. . Alternatively, when the user channel is multiplexed with the subcarriers to be used, the number of subcarriers and the subcarrier identification when transmitting to the terminal on the user channel by using the downlink dedicated control channel 5-2. Just give them the number.

(Second Embodiment) Next, a broadband mobile access system according to a second embodiment of the present invention will be described. The overall configuration is the same as the broadband mobile access system according to the first embodiment shown in FIG. FIG. 6 is a diagram showing a configuration of a radio base station according to the second embodiment.

The radio base station 6-1 of the present embodiment controls the connection / release of the radio line and the management of the terminal similarly to the radio base station according to the first embodiment shown in FIGS. 2 and 10. A device 6-2, a terminal management table 6-3 that stores information for managing terminals, a network interface 6-4 for connecting to a communication network such as an IP router network, and user information from a wireless base station. When transmitting, a wireless access control means 6-5 for instructing the transmitting wireless device of a slot position and the like, a first wireless device 6-6,
It is composed of a second wireless device 6-7 that performs wireless communication in a frequency band higher than that of the first wireless device, and antenna devices 6-8 and 6-9 connected to the respective wireless devices. Further, in the present embodiment, the control device 6-2 includes the wireless transmission control device 6-10. This wireless transmission control device 6-1
0 indicates whether to transmit the user information or the control information to the terminal by using the first wireless device or the second wireless device, as shown in FIG. 7, for example. Make a decision based on the procedure.

When the radio base station 6-1 according to this embodiment receives data addressed to a predetermined terminal from the communication network (step 7-1), first, the terminal management table 6-
3, and based on this, it is checked whether the terminal is associated with the wireless communication using the second frequency band (step 7-2). If it is not associated with the second frequency, it is transmitted from the first wireless device 6-6 (step 7-4). Next, the first radio 6-
The radio resource allocation status of other user information and control information to be transmitted in 6 is, for example, the radio access control means 6
-5 is checked based on the status of slot assignment (step 7-3). At this time, if sufficient wireless resources are available to transmit the user information and control information addressed to the terminal, the user information and control information are transmitted from the first wireless device 6-6 (step 7). -4). If sufficient wireless resources are not available, the user information and control information are transmitted from the second wireless device 6-7 (step 7-5). According to the procedure shown in FIG. 7, the number of situations in which the terminal receives the user information and the control information by the second wireless device 3-7 can be reduced as much as possible. Therefore,
It is possible to suppress the operation frequency of the wireless device using a high frequency and reduce the power consumption when receiving the same information.

As a modification of the procedure shown in FIG. 7, for example, after step 7-2, the type of user information addressed to the terminal received by the network interface 6-4 from the communication network 1-1 is checked. If this is information that is desired to be transmitted at a bursty high speed such as file transfer, it is transmitted from the second wireless device 6-7 (step 7-5), and if not, step 7-3. To execute. At this time, for example, the protocol field of the data packet is referred to as the type of user information, and this is ft.
In the case of a protocol used for a file transfer type application such as p or http, it can be determined that it should be transmitted from the second wireless device 6-7. According to such a procedure, it is possible to appropriately transmit the data of the file transfer type application that requires high throughput by appropriately using the second radio frequency band in which it is easy to secure a wider-band radio resource. Therefore, the time required for file transfer can be shortened.

In addition, the procedure as shown in FIG. 8 may be applied.

First, the network interface 6-4 checks the type of user information addressed to the terminal received from the communication network 1-1 by the same procedure as the above-mentioned method (step 8-2). If this does not require bursty transmission at a high speed such as file transfer, the first wireless device 6-6 transmits the data (step 8-3). Otherwise, the process proceeds to step 8-4. To do. Here, when the required transmission rate for burst transfer is defined,
Check whether enough connections have been set up to achieve that speed (step 8-4). If not enough connections are set, a plurality of connections are set using a plurality of wireless carriers from the second radio frequency band, for example. That is, the bandwidth of the connection is increased (step 8-5).

Next, the radio transmission control device 6-10 collects and organizes reports from terminals regarding the quality of data transmission errors of each connection. When allocating radio resources for transmitting user information addressed to a terminal, allocation is performed in order from the connection with the highest quality until the required transmission rate is satisfied, and then transmitted from the second radio 6-7 (step 8). -6). By this procedure, data of file transfer type applications that require high throughput can be transmitted on the second radio frequency band where it is easy to secure a wider-band radio resource, and at a frequency with high transmission quality. You can Therefore, the time required for file transfer can be shortened like the procedure of FIG. 7 described above, and it is preferable to the procedure of FIG. 7 in consideration of transmission quality.

(Third Embodiment) Next, a broadband mobile access system according to a third embodiment of the present invention will be described. The overall configuration is similar to that of the broadband mobile access system according to the first embodiment shown in FIG. FIG. 9 is a diagram showing an example of the flow of communication path setting when the first wireless device and the second wireless device are used jointly.

In the radio base station 9-2, the second radio 9-4 uses a radio frequency band higher than that of the first radio 9-3. Generally, in the propagation of radio waves, the higher frequency band has a larger amount of attenuation, and therefore the range of the radio waves becomes narrower when transmitted with the same output. In FIG. 9, the terminal 9-1 has received the notification information (9-5) from the first wireless device 9-3 of the wireless base station 9-2 from the beginning, and the second information has been received by moving the terminal or the like from the middle. The radio wave from the wireless device 9-4 comes to arrive, and the notification information (9-1
The figure shows an example in which 1) can be received.

The terminal 9-1 transmits the association request (9-6) to the base station indicated by the notification information (9-5) from the first radio 9-3. After performing authentication or the like as necessary, the wireless base station 9-2 transmits an association response (9-7) to the terminal 9-1. Next terminal 9
-1 transmits a connection setting request (9-8) to the wireless base station 9-2 together with transmission request quality information such as required transmission speed and response time. The radio base station 9-2 allocates radio resources, performs charging start processing and the like as necessary, and then transmits a connection setting response (9-9) to the terminal 9-1. After that, the user information is sent to the terminal 9-1.
Transfer is started between the wireless base station and the wireless base station 9-2 (9-1
0). In the procedure up to this point, communication is performed using the first radio of the terminal 9-1 and the radio base station 9-2.

Next, as the terminal 9-1 moves, it becomes possible to receive the notification information (9-11) from the second radio 9-3 of the radio base station 9-2. At this time, if there is a request to further increase the transmission speed of the user information performed by the first wireless device 9-3, the wireless base station 9-
The setting of the connection is started so that the user information can be transmitted from the second wireless device 9-4. Therefore, the terminal 9-1 sends a connection setting request (9-12) for using the second frequency band to the base station 9-2 to the base station 9-2, together with the transmission request quality information such as the required transmission rate and the response time. The wireless device (not shown in FIG. 9) is used for transmission. The radio base station 9-2 allocates radio resources, performs charging start processing and the like as necessary, and then sends a connection setting response (9-13) to the terminal using the first radio 9-3. Send. After that, among the user information, the terminal 9
The first radio is used for transmission from -1 (9-14),
The second radio 9-4 is used for transmission from the radio base station 9-2 to the terminal 9-1 (9-15). As described above, in message transmission such as connection setting for communication using the second frequency band, by transmitting the message by the first wireless device using the first frequency band that enables wireless communication in a wider range. In addition, stable message transmission / reception can be performed, and power consumption can be reduced by suppressing the frequency of operation of a wireless device using a high frequency. In particular, even when the wireless terminal 9-1 does not have the transmission function of the second wireless device, the downlink of the communication using the second frequency band, that is, the one from the wireless base station 9-2 to the terminal 9-1 is transmitted. Directional connections can be set. This allows terminal 9
-1 eliminates the need to mount a power amplifier for high radio frequency, which consumes a large amount of power and generates heat. Therefore, the size and weight of the terminal 9-1 can be reduced in combination with the size reduction of the battery. Further, a message sequence for setting a connection, a protocol used for message transfer, and the like are ARIB-T70 which is a conventional technique.
You can use the ones specified in. Therefore, unlike the conventional example of the hybrid MMAC system, it is not necessary to transfer the message from the terminal to the wireless base station via the IP router network or the like, and the terminal and the wireless base station are directly connected by the wireless link. , Can exchange messages.

The present invention is not limited to the above-mentioned embodiment and can be variously modified and carried out.

[0042]

According to the present invention described above, different frequency bands are integrated or selectively used in wireless communication between a wireless base station and a terminal to improve communication efficiency and reduce power consumption. A broadband mobile access system can be provided.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing an overall configuration of a broadband mobile access system according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a radio base station used in the broadband mobile access system according to the first embodiment.

FIG. 3 is a diagram showing a configuration of a terminal used in the broadband mobile access system according to the first embodiment of the present invention.

FIG. 4 is a diagram showing an example of a basic configuration of a wireless communication frame applied to the broadband mobile access system according to the present invention.

FIG. 5 is a diagram showing another example of a wireless communication frame applied to the broadband mobile access system according to the present invention.

FIG. 6 is a diagram showing a configuration of a radio base station according to a second embodiment.

FIG. 7 is a flowchart showing an example of a procedure for selecting a wireless device in a wireless base station according to the second embodiment of the present invention.

FIG. 8 is a flowchart showing another example of a procedure for selecting a wireless device in a wireless base station according to the second embodiment.

FIG. 9 is a diagram showing a procedure for setting a communication path using a second radio frequency band according to the third embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration example of a radio base station in the case of performing transmission using two radio carriers for a second frequency band according to the first embodiment of the present invention.

FIG. 11 is a block diagram showing an example of the configuration of a terminal according to the first embodiment of the present invention when performing transmission using two wireless carriers for a second frequency band.

FIG. 12 is a diagram showing an overall configuration of a hybrid MMAC system according to a conventional example.

[Explanation of symbols]

1-1 ... Communication network 1-2 ... Server device 1-3 ... Wireless base station 1-4 ... Terminal 1-5, 1-6 ... wireless line

Claims (8)

[Claims] 1. A broadband mobile access system for performing wireless communication between a wireless base station and a terminal, wherein the wireless base station and the terminal communicate with a first wireless device that performs wireless communication using a first frequency band. A second wireless device that performs wireless communication using a second frequency band higher than the first frequency band, and a user using the second wireless device from the wireless base station to the terminal. Prior to transmitting the information, the wireless parameter information used for transmitting the user information is transmitted from the first wireless device of the wireless base station to the first wireless device of the terminal, and the terminal is the first wireless device. A broadband mobile access system, wherein one wireless device receives the wireless parameter information, and the second wireless device receives the user information based on the wireless parameter information received by the first wireless device. 2. The radio base station selects which of the first radio device and the second radio device to use when transmitting user information to the terminal according to the type of the user information. A means for performing the operation is provided.
Broadband mobile access system according to. 3. The wireless base station and the terminal each include a wireless communication frame for a first communication using the first wireless device, and a wireless communication frame for a second communication using the second wireless device. The broadband mobile access system according to claim 1 or 2, further comprising: a radio access control unit that controls the first radio and the second radio so as to synchronize with a frame. 4. When the terminal falls within the range of radio waves from the second radio of the radio base station due to a change in the communication environment of the terminal, in addition to the radio communication frame relating to the first communication, The broadband mobile access system according to any one of claims 1 to 3, wherein a wireless communication frame relating to the second communication is used. 5. The radio parameter information includes user information transmission start timing, transmission frequency band, modulation scheme, modulation multi-level number, modulation rate, error correction coding rate, spreading code, number of subcarriers, and subcarrier identification. The broadband mobile access system according to any one of claims 1 to 4, comprising at least one of the numbers. 6. A radio base station which is applied to a broadband mobile access system and performs radio communication with a terminal, the radio base station performing radio communication using a first frequency band, and A second wireless device that performs wireless communication using a second frequency band higher than the frequency band of, and prior to transmitting user information to the terminal using the second wireless device, the user information And a radio access control means for controlling the transmission of the radio parameter information used for the transmission from the first radio to the first radio of the terminal. 7. A wireless terminal which is applied to a broadband mobile access system and wirelessly communicates with a wireless base station, the wireless terminal performing wireless communication using a first frequency band, and A second wireless device that performs wireless communication using a second frequency band higher than one frequency band, and after receiving wireless parameter information using the first wireless device, based on the wireless parameter A wireless terminal comprising: a wireless access control means for controlling the reception of user information by a second wireless device. 8. A broadband mobile access system for performing wireless communication between a wireless base station and a terminal, wherein the wireless base station and the terminal communicate with a first wireless device for wireless communication using a first frequency band. , A second radio that performs wireless communication using a second frequency band higher than the first frequency band, respectively, the second frequency band between the wireless base station and the terminal. In order to set the communication path used, the radio base station,
A broadband mobile access system, wherein at least a part of control information is transmitted to the terminal using the first radio.