JPH11331927A - Radio channel access method for time division mobile communication system, base station and mobile station to use the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio channel access method for time division mobile communication system, in which data communication and voice communication are efficiently performed satisfying the communication quality. SOLUTION: Concerning the access method where a time division communication system and a burst access communication system coexist, when a base station changes the configuration (S1) in the case of changing the configuration of a communication channel based on the contents of information and reporting that change from the base station to a mobile station, communication channel frame constitution information is updated, change timing is calculated (S2), further, differential information and change timing is calculated (S3) and this information is reported to the mobile station (S4). At the timing to change the communication channel, the base station changes the frame constitution of the relevant communication channel (S6) and turns the change timing in the alarm information of a control channel or the beacon of the communication channel to '0' (S7).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio channel access method in a time division communication type mobile communication system,
It relates to a base station and a mobile station using the method.

[0002]

2. Description of the Related Art In the technical field of wireless communication, various communication channel access methods are used for performing communication without interference (avoiding signal collision) between many communication devices. In the field of wireless LAN, a wireless access method using burst access communication is used as one of the communication access methods. The burst access communication is a communication method for a computer or the like to efficiently transmit and receive data to and from another computer or data terminal device at a specific time. For example, as shown in FIG. 1, a certain frequency is assigned to a plurality of mobile stations and base stations (STs).
A1 to STAn) and the time of transmission and reception (T1 to T1)
The frame length can be made variable by a method of making communication different from that of 4).

[0003] Also, as a wireless LAN standard, IEEE
P802.11. FIG. 2 shows a frame configuration example of the wireless access system. There are two burst access methods, a contention method and a non-contention method.
The contention-free part in FIG. 2 belongs to the non-contention method. For example, a polling signal for allowing the base station to transmit data (for example, in FIG. 2, the polling signal is sequentially and intermittently transmitted to the mobile station after a certain period after the beacon B). Is transmitted to the mobile station, and the mobile station receives the signal and transmits variable-length frame data to the base station based on the polling signal. The contention part of FIG.
For example, before the mobile station and the base station transmit data, the use state of the line is determined by detecting the carrier frequency (carrier sense), and if another base station or mobile station is not using the line, a frame is transmitted. However, if the line is in use, this is an access method that suspends data transmission. Also,
The beacon inserted at the beginning of the basic frame in FIG. 2 is used as a control channel to notify the mobile station of information on the period of the basic frame and the contention-free period.

On the other hand, as a radio system of the time division communication system, there are a digital cellular telephone and a digital cordless telephone. The standard for digital cellular telephones is RCR
There is STD-27 "Digital Car Phone System". For example, as shown in FIG. 3, a line from the mobile station to the base station (hereinafter, referred to as “uplink”) (A) and a line from the base station to the mobile station (hereinafter, referred to as “downlink”).
As (B), different frequencies are used, and the uplink and downlink have the same basic period T. The uplink and downlink basic periods T each have a fixed length of 6 frames (frames). TD time-divided by 1 to frame 6)
The MA (Time Division Multiple Access) method is used. The numbers in FIGS. 2A and 2B are the numbers of the frames assigned to the time slots.

[0005] Here, the communication line to be used is assigned by the base station. For example, when a mobile station performs communication, communication is performed using a frame assigned by the base station (for example, frame 1 of frame number 1). That is, the base station and the mobile station perform communication using a frame 1 (frame 1 with a slash removed), which is repeated for each basic cycle, on the uplink and the downlink as a communication line.

As a standard of a digital cordless telephone, there is RCR STD-28 "Second generation cordless telephone system", in which the same frequency is used for the uplink and the downlink, and the uplink and the downlink are time-divided. use. As shown in FIG. 4, TDMA / TDD (TDMA) is time-division-divided into four frames each having a fixed length, as shown in FIG.
ime Division Multiple Access / Time Division Duple
x) The system has been adopted.

Here, the communication line to be used is assigned by the base station. For example, when a mobile station performs communication, communication is performed using a frame assigned by the base station (for example, frame 2 of frame number 2). In other words, the base station and the mobile station perform communication using a frame 2 that is repeated for each basic cycle on the uplink and the downlink as a communication line.

Further, these TDMA, TDMA / FD
D (Time Division Multiple Access / Frequency Divisi
on Duplex) or a technology that multiplexes a channel configured with TDMA / TDD by frequency (FDMA: Freq
uency Division Multiple Access) can be used. By using this technique, the number of usable channels can be increased. For example, if N frequencies are used, it is possible to use N times as many channels.

[0009] On the other hand, there is a spread spectrum system, which includes a direct spread system in which a signal is spread using a code and a frequency hopping system in which a signal is spread by instantaneously changing the frequency of a carrier. Known from. These are multiplexing techniques in which a plurality of channels can be used by spreading a signal using a different code or hopping pattern for a signal on the same frequency band. Currently, standardization work is progressing, and in the next-generation mobile communication standard IMT-2000, CDMA (Code) that performs multiplexing by code spreading as multiplexing orthogonal to frequency multiplexing (a signal that does not interfere with signals due to frequency multiplexing). Div
ision Multiple Access).

[0010]

A burst access communication method used for a wireless LAN, which is one of the above-mentioned wireless channel access methods, is for transmitting bursty data (a large amount of data generated in a short period). Optimized for On the other hand, when real-time communication such as voice communication is performed, it is necessary in principle to acquire and store a line. In order to perform the real-time communication by the burst access communication method, it is necessary to transmit and receive the data of the real-time communication at periodic timing. In this case, transmission timing overlaps with burst-like data that occurs irregularly.
If this is avoided, the communication quality of the real-time communication cannot always be guaranteed, such as the occurrence of frame transmission delay or the interruption of voice. On the other hand, the TDMA system used for cellular communication is suitable for real-time communication because a communication channel is reserved in advance, but when data is transmitted in bursts, even if the data amount is small, a fixed-length data is used. A TDMA access area (time slot) must be allocated, which results in useless allocation of time slots and lowers line use efficiency. In addition, for each generated data, TDMA
The control becomes very complicated, such as assigning time slots.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a wireless access method for satisfying required communication quality and efficiently performing data communication and voice communication. is there.

[0012]

According to a first aspect of the present invention, there is provided a radio channel access method in a time division communication type mobile communication system, wherein a basic frame of the time division communication includes a burst access communication area and a time division communication. A wireless channel access method in a time-division communication type mobile communication system, wherein the wireless channel is divided into service areas and burst access communication and time-division communication are allowed to coexist.

According to the first aspect of the present invention, the basic frame of time-division communication is divided into an area for burst access communication and an area for time-division communication. In addition, it is possible to provide a wireless channel access method capable of performing control for satisfying communication quality according to each traffic of data communication.

According to a second aspect of the present invention, in the radio channel access method in the time division communication type mobile communication system according to the first aspect, the communication channel configuration of the burst access communication and the time division communication is dynamically changed. It is characterized by changing. According to the invention described in claim 2,
By dynamically changing the communication channel configuration of burst access communication and time-division communication, it is possible to control to satisfy the communication quality according to each traffic of voice communication and data communication, and data communication and voice communication are required Wireless channel access method that satisfies the above communication quality and performs the communication efficiently.

According to a third aspect of the present invention, in the radio channel access method in the time-division communication type mobile communication system according to the first or second aspect, the base station is adapted to execute the mobile station prior to the change of the communication channel configuration. The content of the change of the communication channel configuration is notified by a control channel or a communication channel. According to the invention described in claim 3, the base station notifies the mobile station of the content of the change in the communication channel configuration prior to the change in the communication channel configuration, so that the mobile station reliably changes the communication channel configuration. be able to. In addition, if necessary, the content of the change in the communication channel configuration is notified by the communication channel, so that the base station notifies the mobile station of the content of the change in the communication channel configuration flexibly according to the amount of control data. can do.

According to a fourth aspect of the present invention, in the wireless channel access method in the time division communication type mobile communication system according to the third aspect, the base station is configured to change the communication channel configuration before the change. The information of the difference between the communication channel configuration and the communication channel configuration after the change is notified. According to the fourth aspect of the present invention, the communication channel configuration itself is notified by notifying the difference information between the communication channel configuration before the change and the communication channel configuration after the change as the content of the change of the communication channel configuration. In comparison with the above, it is possible to notify the contents of the change of the communication channel configuration with a small amount of data.

According to a fifth aspect of the present invention, there is provided the radio channel access method in the time division communication type mobile communication system according to any one of the first to fourth aspects, wherein the time division communication system has a TDD or FDD configuration. It is characterized by the following. According to the invention described in claim 5, TDD or FD
With the D configuration, uplink and downlink can be separated and line control can be simplified.

According to the invention described in claim 6, in claim 1
A wireless channel access method in a time-division communication system mobile communication system according to any one of claims 1 to 5,
The mobile station changes the configuration of the communication channel based on the content of the change in the communication channel configuration transmitted from the base station prior to the change in the communication channel configuration.

According to a sixth aspect of the present invention, a mobile station in a wireless channel access method in a time-division communication type mobile communication system is defined. According to a seventh aspect of the present invention, there is provided the radio channel access method in the time division communication type mobile communication system according to any one of the first to sixth aspects, wherein the time division multiplex communication and the spread spectrum multiplex communication are performed. It is characterized by performing.

According to the seventh aspect of the present invention, in addition to multiplex communication by time division, multiplex communication by spread spectrum is performed to divide the communication channel by the code axis in addition to the frequency axis. This makes it possible to provide a wireless channel access method in which the communication channel selection range is further expanded. Further, if multiplex communication using broadband spread spectrum is used, more channels can be used, and a more efficient wireless channel access method can be provided by a combination of free channel configurations.

In the base station in a time-division communication type mobile communication system, a base frame of time-division communication is divided into an area for burst access communication and an area for time-division communication. A base station in a time-division mobile communication system characterized by communicating with a mobile station by communication and time-division communication.

According to a ninth aspect of the present invention, in the base station in the time division communication type mobile communication system according to the eighth aspect, a communication channel configuration of the burst access communication and the time division communication is dynamically changed. It is characterized by the following. The invention according to claims 8 and 9 specifies a base station suitable for a radio channel access method in a time-division communication type mobile communication system.

According to a tenth aspect of the present invention, in a mobile station in a time-division communication type mobile communication system, a basic frame of time-division communication is divided into a burst access communication area and a time-division communication area. A mobile station in a time-division mobile communication system characterized by communicating with a base station by burst access communication and time-division communication using a frame.

The invention described in claim 11 is the first invention.
0, wherein the mobile station in the time-division communication system mobile communication system dynamically changes communication channel configurations of the burst access communication and the time-division communication in accordance with an instruction from the base station. According to the tenth and eleventh aspects of the present invention, a mobile station suitable for a wireless channel access method in a time-division communication type mobile communication system is specified.

[0025]

Embodiments of the present invention will be described. FIG. 16 shows a configuration example of the mobile communication system of the present invention. Radio control station 1 connected to public telephone network, LAN, etc.
Are connected to the wireless base station 2 by wire or wirelessly. Each wireless base station 2 has communication zones 4 and 5, and each wireless base station 2 communicates with a wireless mobile station 3 in its own communication zone 4 or 5. The radio mobile station 3 communicates with the public network via the radio base station 2 and the radio network controller 1 in the communication zone where the mobile station is located.
It is connected to a LAN and performs telephone communication or data communication with a telephone or a data terminal device. Note that one of the radio base stations 2 may be configured to have the function of the radio network controller 1.

FIG. 17 shows the radio network controller 1. The radio network controller 1 includes a wired interface 11, a controller 12,
It has a memory 13 and the like. The wired interface 11 interfaces with a public telephone network, a LAN, the wireless base station 2, and the like. The control unit 12 controls a line or the like of the wireless base station. For example, it instructs the wireless base station 2 to change the channel access configuration of the wireless channel based on the content to be communicated (telephone communication, data communication) so that efficient communication is performed. The memory 13 stores information and the like necessary for changing the channel access configuration of the wireless line. For example, information on base stations, communication information, line information, and the like are stored.

FIG. 18 shows the radio base station 2. The wireless base station 2 has a wired interface 21, a wireless transmitting / receiving unit 22, a control unit 23, a memory 24, and the like. The wired interface 21 interfaces with the wireless control station 1. The wireless transmission / reception unit 22 performs wireless transmission / reception with the wireless mobile station 3 in its own communication zone. The control unit 23 controls the radio control station 1
And performs line control and the like. For example, based on an instruction from the wireless control station 1, the configuration of the channel access of the wireless line is changed. The memory 24 stores information and the like necessary for controlling the wireless line. For example, it stores information on the channel access configuration of the wireless channel, information on basic frame synchronization, information on a change in the channel access configuration, and the like.

FIG. 19 shows the radio mobile station 3. The wireless mobile station 3 includes a wireless transmission / reception unit 31, a control unit 32, a memory 33, and the like. The wireless transmission / reception unit 31 performs wireless transmission / reception to / from the wireless base station 2 in the communication zone where the wireless communication apparatus is located. Control unit 32
Performs line control or the like in response to an instruction from the wireless base station 2. For example, based on an instruction from the wireless base station 2, the configuration of the channel access of the wireless line is changed. Memory 3
Reference numeral 3 stores information necessary for changing the channel access configuration of the wireless line. For example, the configuration of the current wireless channel access, information on basic frame synchronization,
Information related to the change in the channel access configuration is stored.

In order to solve the above-mentioned problems, a radio channel access method according to the present invention is applied to a time-division mobile communication system having one or more control channels and one or more communication channels. This is a wireless access system that can use a mixture of a burst access communication method and a burst access communication method. Here, the time division communication system may be any of TDMA, TDMA / TDD, and TDMA / FDD, and the burst access communication system may be a contention system, a non-contention system, or a mixture thereof. Further, the mixture of the time division communication system and the burst access system may be dynamically changeable. In this case, the base station instructs the configuration of the communication channel to be changed and the change timing, and the mobile station follows the instruction.
Also, the base station notifies the mobile station of an instruction using a control channel or a communication channel.

Also, by applying CDMA, it is possible to multiplex communication channels on the axis of the code in addition to the axis of the conventional frequency. (First Embodiment) FIGS. 5 to 1 show a first embodiment.
2 will be described. FIG. 5A shows the TDMA / TDD
This is an example of a frame, and eight downlink frames and eight uplink lines are used as basic frame periods. In the example, the number of frames for the uplink and the downlink is 8 respectively, but it is possible to independently take one or more arbitrary numbers. In FIG. 5A, the basic frame period is 16. FIG. 5B shows an example in which TDMA / TDD and a burst access method coexist. In the example, TD
The number of downstream frames of the MA / TDD frame is 3, the number of upstream frames is 2, and the remainder of the basic frame period 16 is an access portion by the burst access method. In this case as well, any number of TDMA / TDD frames can be assigned any number equal to or greater than 0, but the total does not exceed the basic frame period 16 and the rest is the burst access method. (If the number of TDMA / TDD frames is 0 for the downlink and 0 for the uplink, only the burst access method is used.) FIG. 6 is an enlarged view of a portion of the burst access method in FIG. 5B, and notifies the frame configuration information of the burst access method by using a beacon signal. The burst access basic frame period can be set to any period such that its integral multiple is the burst access method period.

Here, in a system having at least one or more control channels and at least one or more communication channels, the default configuration of the communication channel is changed from the configuration of the TDMA / TDD communication frame shown in FIG. Carrier frequency) only in TDMA / T in FIG.
A method of changing to a communication channel frame configuration as in an example in which DD and burst access methods coexist will be described.

FIGS. 7, 9 and 10 show information that the base station needs to notify the mobile station. Information to be broadcast to the mobile station in the control channel or the communication channel includes frame configuration information of the communication channel. In the example of FIG. 7, the channel number (the channel number is different for each carrier frequency) is set to default, and the default communication channel configuration is such that the basic frame period is 16, the TDMA / TDD configuration is uplink 8 frames, and the downlink is 8 frames. The line 8 frames, no burst access method, and change timing have been completed. Here, the change timing indicates the remaining number of basic frame periods for changing the frame configuration as shown in FIG. Therefore, a value of 0 indicates that the change has been completed. In channel number 2, the communication channel has a basic frame period of 16, a TDMA / TDD configuration has three downlinks, two uplinks, a burst access scheme of 802.11, and a change timing of 10. It must be changed after the frame period. Here, an example in which only the channel number 2 is changed has been described, but a plurality of channel numbers can be designated. In that case, after the channel 2, the channel configuration is repeated for the channels different from the default value.

Also, for example, by setting the TDMA / TDD configuration to downlink 4 and uplink 0, it is possible to specify a radio access system as TDMA, and to use TDMA in another communication channel.
/ Can be mixed with TDD. Finally, a communication channel frame configuration information pattern is set. This is a modulo (for example, in the case of a 3-bit configuration, the configuration returns to the original value when the configuration is changed eight times), and is updated every time the frame configuration is changed (the change only at the change timing is not included). By detecting the value of the communication channel frame configuration information pattern, the mobile station can know that a change in the frame configuration has occurred or what number is currently being changed.

Next, there is communication channel frame configuration difference information as information to be broadcast to the mobile station in the communication channel. FIG. 9 shows an example of communication channel frame configuration difference information. This is to transmit only the changed information in the communication channel frame configuration when the communication channel frame configuration is changed. This makes it possible to reduce the amount of control information transmitted on the communication channel.

Further, there is an incoming signal as information to be notified to the mobile station through the control channel. FIG. 10 shows an incoming signal format broadcast from the base station to the mobile station. This notifies the mobile station of the presence / absence of a call and the called number in the case of a call. In order to notify the waiting mobile station of a change in the communication channel structure, the communication channel frame configuration information pattern is changed. Informing. In this example, the communication channel frame configuration information pattern is broadcast, but the communication channel frame configuration information pattern does not necessarily need to be notified.

In an access method in which a time-division communication method and a burst access communication method are mixed, a control flow in a case where a base station changes a communication channel configuration based on an instruction of a radio control station and notifies the mobile station of the change. Is shown in FIG. The base station usually broadcasts the communication channel frame configuration information using the control channel, and divides a part of the communication channel as necessary, and uses the communication channel to transmit the communication channel frame configuration information and the communication channel frame configuration difference information. And broadcast at least one piece of information (when necessary, select according to the broadcast capacity of control information in the communication channel). Here, when the communication channel configuration is changed and the mobile station is notified of the change, the communication channel frame configuration information is updated, the change timing of the channel to be changed is calculated for each basic frame period, and S2. S3, which calculates the frame configuration difference information and the change timing of the channel to be changed, and broadcasts it through the control channel broadcast information and the communication channel beacon S4. Also, it is time to change the communication channel (YES in S5).
And the base station changes the frame configuration of the corresponding communication channel (S6). Accordingly, since the communication channel has been changed, the change timing in the broadcast information of the control channel and the beacon of the communication channel is set to 0 (S7).

FIG. 12 shows the operation of the mobile station. When the mobile station starts up S10, or when moving from another area, it receives a control channel from the base station S11, acquires broadcast information S12, and stores communication channel frame configuration information S13. Next, whether to wait in TDMA / TDD
According to 14, in the case of Yes, a standby state S15 is set based on the incoming signal of the control channel. Here, when it is detected that a change has occurred in the communication channel frame configuration, NO in S16, the notification information acquiring process is performed again in S12. On the other hand, TD
If NO in S14, whether to wait in MA / TDD, in the case of No, a request is made to obtain a communication channel number in which a burst access method for waiting in a control channel exists S17, and a communication channel number is received from the base station S
18. The communication channel frame configuration information corresponding to the communication channel number is read out from the stored information in S19, and a standby is made by receiving a beacon in S20. Here, when a change in the communication channel configuration is detected (S2
1; NO), when the received frame configuration information is the communication channel frame configuration difference information, and the increment of the communication channel frame configuration information pattern is not 1 (S22,
(NO in S23), S1 performed again from control channel reception
One. In other cases, the communication channel frame configuration information or the communication channel frame configuration difference information is stored.
24. If the communication channel whose frame configuration is to be changed is not its own standby, the standby process is continued by receiving a beacon. If the own channel is its own standby channel, the basic frame period is counted according to the change timing of the stored information. At the timing, the standby timing is changed, a beacon is received, and the standby process is continued. (Second Embodiment) A second embodiment will be described with reference to FIG. The first embodiment differs from the first embodiment in that the time division communication system has a TDD configuration, whereas the second embodiment has an FDD configuration. Therefore, much of the description of the first embodiment can be applied mutatis mutandis.

FIG. 13A shows an example of a TDMA frame, where eight frames for the downlink and eight frames for the uplink are used as basic frame periods. In FIG. 13A, the number of frames is set to eight, but an arbitrary number of one or more can be used. FIG. 13B shows the TDM
This is an example in which A and the burst access method coexist. In an example in which the TDMA and the burst access method coexist, the number of downlink frames of the TDMA frame is 2, the number of uplink frames is 3, and the rest of the basic frame period is the burst access method. Here, the portion of the burst access method can be accessed without distinction between the uplink and the downlink. In this case as well, any number of TDMA frames can be assigned any number equal to or greater than 0, respectively.
The sum cannot be more than the basic frame period 8,
The rest is the burst access method (when the number of TDMA frames is 0 for down and 0 for up, only the burst access method is used). The burst access scheme has the configuration shown in FIG. 6 as in the first embodiment.

Here, in a system having at least one or more control channels and two or more communication channels, the default configuration of the communication channels 1 to 9 is shown in FIG.
Since the default configuration of the communication channels 10 to 18 is the channel shown in the uplink of the example of the TDMA frame shown in FIG. A method of changing only a certain communication channel as in the example in which the TDMA and the burst access method coexist in FIG. 13B will be described with an example (the number of each communication channel is an example, and the number is arbitrary. Numbers are possible).

The communication channel frame configuration information examples and the communication channel frame configuration difference information examples in FIGS. 7 and 9 described in the first embodiment can be changed as shown in FIGS. Uses the same incoming signal format as that of FIG. Further, the operation flow is the same as that of the first embodiment shown in FIG. The communication channels 1 to 9 are set by setting the channel numbers of the communication channel frame configuration information to 1 to 9, the basic frame period to 8, the TDMA / TDD configuration to 8 down, 0 to 0, no burst access method, and the change timing. Can be notified, and similarly, the downlink channels 10 to 1
Eight channel configurations can also be notified. Here, the change timing is the same as in the first embodiment. In addition, it is shown that by specifying channel number 1 and channel number 10 again, the communication channel configuration is changed after 10 basic frame periods. Here, an example in which only the channel numbers 1 and 10 are changed has been described, but a plurality of channel numbers can be designated. Also, for example, T
By setting the DMA / TDD configuration to downlink 4 and uplink 4, the radio access system can be designated as TDMA / TDD, and can be mixed with TDMA on another communication channel. The setting of the communication channel frame configuration information pattern is the same as that of the first embodiment. The communication channel frame configuration difference information has the same configuration as that of the first embodiment, and sends the channel 1 and 10 channel configurations to be changed. As described above, similarly to the first embodiment, the present invention can be implemented by TDMA. (Third Embodiment) CDMA uses code spreading,
This is a multiplexing technique in which a channel number can be designated by a frequency and a code. Thereby, the number of channels can be increased.

Since CDMA has orthogonality with TDM and FDM, CDMA can be further applied to the first embodiment or the second embodiment. Further channel numbers can be added to the first embodiment or the second embodiment by codes and frequency numbers. Although CDMA is a direct spread spectrum spread spectrum method, it can also be applied to a frequency hopping method, and can also be applied to a combination of CDMA and a frequency hopping method.

[0042]

According to the present invention as described above, the following various effects can be realized. According to the first aspect of the present invention, the basic frame of the time-division communication is divided into a burst access communication area and a time-division communication area, and the burst access communication and the time-division communication are mixed.
It is possible to provide a wireless channel access method that can be controlled to satisfy communication quality according to each traffic of voice communication and data communication.

According to the second aspect of the present invention, by dynamically changing the communication channel configuration of the burst access communication and the time division communication, the communication quality according to the respective traffic of the voice communication and the data communication can be satisfied. Can be provided, and a wireless channel access method for efficiently performing data communication and voice communication with required communication quality and efficiently can be provided. Also, if necessary,
By notifying the contents of the change in the communication channel configuration through the communication channel, the contents of the change in the communication channel configuration can be notified from the base station to the mobile station flexibly according to the amount of control data.

According to the third aspect of the present invention, the base station notifies the mobile station of the content of the change in the communication channel configuration prior to the change in the communication channel configuration, so that the mobile station can
The communication channel configuration can be reliably changed. According to the fourth aspect of the present invention, the communication channel configuration itself is notified by notifying the difference information between the communication channel configuration before the change and the communication channel configuration after the change as the content of the change of the communication channel configuration. In comparison with the above, it is possible to notify the contents of the change of the communication channel configuration with a small amount of data.

According to the fifth aspect of the present invention, the uplink and downlink are separated by the TDD or FDD configuration.
Line control can be simplified. According to the present invention, a mobile station that satisfies the communication quality according to each traffic of voice communication and data communication and is suitable for a radio channel access method in a time-division communication type mobile communication system. Can be provided.

According to the seventh aspect of the present invention, in addition to the multiplex communication based on the time division, the multiplex communication based on the spread spectrum is performed, so that the communication channel can be further divided along the axis of the code in addition to the frequency axis. This makes it possible to provide a wireless channel access method in which the communication channel selection range is further expanded. Further, if multiplex communication using broadband spread spectrum is used, more channels can be used, and a more efficient wireless channel access method can be provided by a combination of free channel configurations.

According to the eighth and ninth aspects of the present invention, a base station suitable for a wireless channel access method in a time-division communication type mobile communication system, which satisfies communication quality according to each traffic of voice communication and data communication. Can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an example of a conventional burst access communication.

FIG. 2 is a diagram illustrating an example of a frame configuration of a conventional burst access method.

FIG. 3 is a diagram illustrating a conventional TDMA.

FIG. 4 is a diagram illustrating a conventional TDMA / TDD.

FIG. 5 is a diagram illustrating a configuration example of a wireless access frame according to the first embodiment;

FIG. 6 is an enlarged view of a synchronization example of the burst access method of the present invention.

FIG. 7 is a diagram for describing an example of communication channel frame configuration information.

FIG. 8 is a diagram showing a change timing of the present invention.

FIG. 9 is an example of communication channel frame configuration difference information.

FIG. 10 is an example of an incoming signal format of a control channel.

FIG. 11 is an example of a flowchart showing the operation of the first embodiment.

FIG. 12 is an example of a flowchart showing an operation of the mobile station in the first embodiment.

FIG. 13 is a diagram illustrating a frame configuration example of wireless access according to the second embodiment.

FIG. 14 is a diagram illustrating an example of communication channel frame configuration information according to the second embodiment.

FIG. 15 is a diagram for describing an example of communication channel frame configuration difference information according to the second embodiment.

FIG. 16 is a diagram illustrating a configuration example of a mobile communication system according to the present invention.

FIG. 17 is a diagram for explaining a radio network controller according to the present invention.

FIG. 18 is a diagram illustrating a wireless base station according to the present invention.

FIG. 19 is a diagram illustrating a wireless mobile station according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Radio | wireless control station 2 Radio base station 3 Radio mobile station 4, 5 Communication zone of radio base station 11, 21 Wired interface 22, 31 Radio transmission / reception part 12, 23, 32 Control part 13, 24, 33 Memory STA1-STAn Move Station and base station T Basic cycle B Beacon

Claims (11)

[Claims] In a radio channel access method in a time division communication type mobile communication system, a basic frame of time division communication is divided into an area for burst access communication and an area for time division communication. A wireless channel access method in a time-division communication type mobile communication system, wherein mixing is possible. 2. The radio channel access method according to claim 1, wherein a communication channel configuration of the burst access communication and the time division communication is dynamically changed. 3. The mobile station according to claim 1, wherein the base station notifies the mobile station of the change in the communication channel configuration via a control channel or a communication channel prior to the change in the communication channel configuration. Wireless channel access method in a time-division communication type mobile communication system. 4. The communication system according to claim 3, wherein the base station notifies information of a difference between the communication channel configuration before the change and the communication channel configuration after the change as the content of the change of the communication channel configuration. Wireless channel access method in a time-division communication type mobile communication system. 5. The radio channel access method in a time-division communication system mobile communication system according to claim 1, wherein the time-division communication system has a TDD or FDD configuration. 6. The mobile station changes a communication channel configuration based on contents of the communication channel configuration change transmitted from the base station prior to the change of the communication channel configuration. A wireless channel access method in a time-division communication system mobile communication system according to any one of claims 1 to 5. 7. A multiplex communication by spread spectrum in addition to multiplex communication by time division.
7. A wireless channel access method in a time-division communication system mobile communication system according to any one of claims 6 to 6. 8. A base station in a time-division communication type mobile communication system, wherein a base frame of the time-division communication is divided into a burst access communication area and a time-division communication area, and the mobile station is subjected to the burst access communication and the time-division communication. A base station in a time-division communication type mobile communication system, characterized by communicating with a base station. 9. The base station according to claim 8, wherein a communication channel configuration of the burst access communication and the time division communication is dynamically changed. 10. A mobile station in a time-division communication type mobile communication system, wherein a basic frame of time-division communication is divided into a burst access communication area and a time-division communication area. A mobile station in a time-division communication type mobile communication system, wherein the mobile station communicates with a base station by divided communication. 11. The mobile communication system according to claim 10, wherein a communication channel configuration of the burst access communication and the time division communication is dynamically changed according to an instruction of a base station. Bureau.