JP2000278327A - Wireless packet communication device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the scale of the device by duplicating data of a common or individual channel and storing a common and an individual storage means which expect data to be transmitted, and deleting the same data as stored data, read out of one storage means to a radio transmission line, from the other storage means. SOLUTION: A radio packet communication device 100 restores received information to packet data, performs processes corresponding to changes of an individual or common channel use signal by user channels, and generates a channel switching indication signal. According to this indication signal, a link control means 104 writes the common or individual packet data to transmission wait buffers 105-0 to 105-n. When they are read out by buffer readout means 106-0 to 106-n and outputted to a radio transmission line 507, the same packet data are deleted from the other transmission wait buffer 105-0 to 105-n. Packet transfer delay at the time of individual-to-common channel switching or reverse switching is reduced and the memory capacity is reduced to make the scale small.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless packet communication apparatus and method for transmitting variable-length data such as packet data by radio, used for a base station apparatus in a mobile communication system.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing a configuration of a mobile communication system showing a base station device using a conventional radio packet communication device.

[0005] The mobile communication system shown in FIG. 5 is connected to a plurality of mobile station devices 501 and 502, a base station device 504 provided with a wireless packet communication device 503, and a base station device 504 via a wired transmission line 505. Exchange device 50
6 is provided.

[0004] The mobile station device 501 or 5 having such a configuration.
CDMA as a communication method between the C.02 and the base station apparatus 504
In a mobile communication system using the (Code Division Multiple Access) method or the like, an individual channel 508 occupied by one mobile station device 501 on a radio transmission path 507,
A common channel 509 shared and used by a plurality of mobile station devices 501 and 502 is provided.
It has been proposed that 8,509 be switched and used in accordance with the amount of communication traffic.

Next, the configuration of the wireless packet communication device 503 will be described with reference to FIG. As shown in FIG. 6, the wireless packet communication device 503 includes a packet data assembling unit 60.
1, a traffic amount measuring unit 602, a channel switching determining unit 603, and n packet data storage buffers 6
04-1 to 604-n, a link control unit 605, a packet transfer unit 606, a transmission waiting buffer 607-0 for a common channel, and n transmission waiting buffers 607-1 to 607-n for an individual channel. , And an individual channel baseband signal processing unit 608 and a common channel baseband signal processing unit 609.

[0006] The base station apparatus 504 includes a wired transmission path terminating means 61 connected to the packet data assembling means 601.
0 and dedicated channel baseband signal processing means 608
And a transmission amplifier unit 611 connected to the common channel baseband signal processing unit 609.

[0007] In such a configuration, the wired transmission line terminating means 610 extracts user data from the data (digital signal) received from the exchange 506 except control information, and outputs the user data to the packet data assembling means 601.

The packet data assembling means 601 restores the packet data from the user data, outputs the packet data to the traffic amount measuring means 602, and stores the packet data in the packet data storage buffers 604-1 to 604-1 provided for each user channel. The corresponding channel i among 604-n
Packet accumulation buffer 604 corresponding to (i = 1 to n)
-Write to (i).

The traffic measuring means 509 calculates the unit time T
The amount of packet data passing per unit, that is, the total data length L is monitored for each channel and compared with a predetermined threshold value M. If the total value L exceeds the threshold value M, the individual channel use signal is converted to a total value L. Is less than or equal to the threshold value M, the common channel use signal is switched to the channel switching determination means 6 for each unit time T.
Occurs to 03.

The channel switching determining means 603 receives an individual or common channel use signal from the traffic amount measuring means 602 for each user channel, and performs the following first to third case processing.

In the first case, when there is no change in the channel to be used, a channel switching instruction signal “none / common” or a channel switching instruction signal “none / individual” indicating that there is no change in the used channel is generated. .

In the second case, when the channel to be used is changed from the common channel to the individual channel, a channel switching instruction signal “common → individual” indicating that the common channel is changed to the individual channel is generated.

In the third case, when the channel to be used is changed from the individual channel to the common channel, a channel switching instruction signal "individual to common" indicating that the individual channel is changed to the common channel is generated.

If the channel switching instruction signal received from the channel switching determining unit 603 is the first case channel switching instruction signal “none / individual”, the link control unit 605 transmits the packet data corresponding to the channel (i). The packet data read from the accumulation buffer 604- (i) is transferred to the transmission waiting buffer 607- (i) for the individual channel.
In the case of the channel switching instruction signal “none / common”, the read packet data is written to the common channel transmission waiting buffer 607-0.

In the case of the second case channel switching instruction signal “individual → common” and the third case channel switching instruction signal “common → individual”, the packet data storage buffer 604 corresponding to the channel (i) -Reading of packet data from (i) is not performed.

[0016] The packet transfer means 606 sends, from the channel switching determination means 603,
When the channel switching instruction signal “individual → common” of the first case is received, all packet data accumulated in the transmission waiting buffer 607-(i) is transmitted to the transmission waiting buffer 607.
Transfer to -0.

When the channel switching instruction signal “common → individual” of the second case is received, the transmission wait buffer 6
In 07-0, all packet data relating to the channel (i) is transferred to the transmission waiting buffer 607- (i). Then, after the transfer is completed, a transfer completion notification (i) is sent to the link control means 605.

Upon receiving the transfer completion notification (i), the link control means 605 restarts reading packet data from the packet data storage buffer 604- (i) corresponding to the channel (i).

The dedicated channel baseband signal processing means 608 reads out the packet data from the transmission waiting buffer 607- (i), performs error correction code processing and modulation processing, and sends it to the transmission amplifier means 611.

The common channel baseband signal processing means 609 reads out the packet data from the transmission waiting buffer 607-0, performs error correction code processing and modulation processing, and sends it out to the transmission amplifier means 611.

Then, the transmission amplifier 611 amplifies the received data. The amplified signal is transmitted to a wireless transmission path 507 via a wireless unit (not shown).

As described above, the conventional wireless packet communication apparatus 503 uses the common channel when the traffic volume of the packet data is small, and uses the individual channel when the traffic volume is large. It is possible to switch the radio channel to be used.

[0023]

However, in the conventional apparatus, the transmission source buffer (for example, 6 bytes) of the switching source is started from the time when the switching of the individual or common channel is started.
07-0) to the transmission wait buffer 607-
It is necessary to interrupt the reading of the packet data from the packet data storage buffer 604- (i) until the packet remaining in (i) is transferred, which causes a problem that the packet transfer delay increases.

Further, in order to transfer a packet, it is necessary to provide a packet data storage buffer 604- (i) for each channel, which causes a problem that a memory size increases and a hardware scale increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to reduce a packet transfer delay at the time of channel switching from individual to common or vice versa, and to reduce a memory capacity of a buffer for waiting for packet data transmission. It is an object of the present invention to provide a wireless packet communication device and method capable of reducing the hardware scale by using the method.

[0026]

SUMMARY OF THE INVENTION The present invention is directed to a common channel when a common channel commonly used by a plurality of terminal devices or a dedicated channel individually used is predicted to be switched from one channel to another channel. Alternatively, the packet data of the individual channel is duplicated and stored in the common and individual storage means for waiting for the transmission of the packet data, and when the stored packet data is read out from one of the storage means to the wireless transmission path, the data is read out. The same packet data is deleted from the other storage means.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first aspect of the present invention relates to a case where a common channel used in common by a plurality of terminal devices or a dedicated channel used individually is predicted to be switched from one to the other channel. The data of the common or individual channel is duplicated and stored in the common and individual storage means for waiting for data transmission, and when the stored data is read out from one storage means to the wireless transmission path, the same data is read out. A function of deleting data from the other storage means.

According to this configuration, it is not necessary to transfer the data remaining in the transmission waiting buffer of the switching source wireless channel to the transmission waiting buffer of the switching destination wireless channel at the time of performing the channel switching. This eliminates the packet transmission delay, and also eliminates the need for a data storage buffer, which was conventionally required to wait for a packet during transfer, thereby reducing the amount of hardware.

According to a second aspect of the present invention, there is provided an assembling means for restoring data of a common channel commonly used by a plurality of terminal devices or dedicated channels individually used, and a traffic amount of the restored data. Measuring means for measuring, determining means for predicting switching from the common channel to the dedicated channel or vice versa based on the traffic amount, common and individual storage means for waiting for data transmission, and the switching is predicted. Control means for duplicating the restored data and storing the duplicated data in the common storage means and the individual storage means; and when the data is read from the common storage means, Reading means for deleting the same data from the common storage means when the data is deleted from the storage means or when the data is read from the individual storage means; The read by detecting means the data is encoded adopts a configuration comprising a processing means for transmitting to the wireless transmission path, the.

According to this configuration, when channel switching is performed, it is not necessary to transfer data remaining in the transmission waiting buffer of the switching source wireless channel to the transmission waiting buffer of the switching destination wireless channel. This eliminates the packet transmission delay, and also eliminates the need for a data storage buffer, which was conventionally required to wait for a packet during transfer, thereby reducing the amount of hardware.

According to a third aspect of the present invention, in the second aspect, when the control means duplicates the restored data and stores it in the common storage means and the individual storage means, the control means A sequence number is added to the number and the data for each user channel number and stored, and the processing unit reads the same data from one of the common storage unit and the individual storage unit when deleting the same data from the other. Data of the same user channel number and the same sequence number as the deleted data.

According to this configuration, the remaining data identical to the transmission data can be reliably deleted without erroneously deleting other data.

According to a fourth aspect of the present invention, there is provided a demodulating means for receiving and demodulating information from a radio transmission line, a separating means for separating the demodulated data into a common channel and an individual channel, It has a processing means for decoding data and a multiplexing means for multiplexing the data after decoding, and adopts a configuration for simultaneously receiving data from both the common channel and the individual channel.

According to this configuration, by simultaneously receiving data from the common channel and the individual channel, it is possible to continuously receive data without loss of data even when the transmission unit switches channels.

According to a fifth aspect of the present invention, a wireless packet communication apparatus is provided by combining the wireless packet transmitting apparatus according to any one of the first to third aspects with the wireless packet receiving apparatus according to the fourth aspect. The configuration is adopted.

According to this configuration, in the wireless packet communication device, the same operation and effect as any of the first to fourth aspects can be obtained.

A sixth aspect of the present invention employs a configuration in which the base station apparatus includes the wireless packet communication device according to the fifth aspect.

According to this configuration, in the base station apparatus,
The same operation and effect as in the fifth aspect can be obtained.

A seventh aspect of the present invention employs a configuration in which a mobile station device is provided with the wireless packet communication device according to the fifth aspect.

According to this configuration, in the mobile station device,
The same operation and effect as in the fifth aspect can be obtained.

An eighth aspect of the present invention employs a configuration in which a mobile communication system includes the base station apparatus according to the sixth aspect and the mobile station apparatus according to the seventh aspect.

According to this configuration, in the mobile communication system, the same functions and effects as those of the sixth and seventh aspects can be obtained.

According to a ninth aspect of the present invention, in the case where channel switching between a common channel commonly used by a plurality of terminal devices and an individual channel used individually is performed in accordance with the amount of data traffic, Or, the data of the individual channel is duplicated, and the duplicated data is stored in the common and individual storage unit that waits for transmission, and when the stored data is read out from the common storage unit to the wireless transmission path,
The same data as the read data is deleted from the individual storage means, and when the data is read from the individual storage means to the wireless transmission path, the same data as the read data is deleted from the common storage means. did.

According to this method, it is not necessary to transfer the data remaining in the transmission waiting buffer of the switching source wireless channel to the transmission waiting buffer of the switching destination wireless channel at the time of performing the channel switching. This eliminates the packet transmission delay, and also eliminates the need for a data storage buffer, which was conventionally required to wait for a packet during transfer, thereby reducing the amount of hardware.

According to a tenth aspect of the present invention, information is received and demodulated from a radio transmission path, the demodulated data is separated into a common channel and an individual channel, and the separated data is decoded. The decoded data is multiplexed, and the multiplexed data is assembled into a frame signal according to the transmission system of the wired transmission line and transmitted to the wired transmission line.

According to this method, by simultaneously receiving data from the common channel and the individual channel, it is possible to continuously receive data without loss of data even when the transmission unit switches channels.

According to an eleventh aspect of the present invention, packet communication is performed by the wireless packet transmitting method according to the ninth aspect and the wireless packet receiving method according to the tenth aspect.

According to this method, the same effects as those in the ninth and tenth aspects can be obtained in packet communication for transmission and reception.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment) FIG. 1 is a block diagram showing a configuration of a radio packet communication apparatus according to an embodiment of the present invention.

However, the wireless packet communication apparatus 100 shown in FIG. 1 is similar to the conventional wireless packet communication apparatus 503 shown in FIG. 6 in the base station apparatus 504 of the mobile communication system shown in FIG. Is used for
For this reason, in FIG.
Elements other than 0 are denoted by the same reference numerals as in FIGS.

Wireless packet communication apparatus 100 shown in FIG.
Are packet data assembling means 101, traffic amount measuring means 102, channel switching judging means 103, link control means 104, transmission waiting buffer 105-0 for common channel and n transmission waiting buffers for individual channels. 105-1 to 105-n, buffer reading means 106-0 for the common channel and n buffer reading means 106-1 to 106-n for the individual channel, baseband signal processing means 107 for the individual channel, And a common channel baseband signal processing unit 108.

The wireless packet communication apparatus 1 having such a configuration
00 will be described.

The wire transmission path terminating means 610 extracts user information from the information received from the wire transmission path 505 and outputs the user information to the packet data assembling means 101. Here, as the wired transmission system, a time division multiplexing transmission system, a transmission system using ATM cells, and the like can be considered, but the type is not limited.

The packet data assembling means 101 restores the packet data from the user information received from the wired transmission path terminating means 610 and outputs the packet data to the traffic amount measuring means 102 and the packet data assembling means 101.

The traffic amount measuring means 102 monitors the amount of packet data passing per unit time T, that is, the total L of data lengths for each channel, and determines two predetermined thresholds M
And N, the following processing is performed.

When L <M, the common channel use signal is
When M ≦ L <N, a switching prediction signal is generated to the channel switching determination unit 103 for each unit time T when N ≦ L, and when N ≦ L, an individual channel use signal is generated.

The channel switching determining means 103 receives the individual or common channel use signal from the traffic amount measuring means 102 for each user channel, and outputs the time Tn-1 and the time Tn.
n according to the change of the channel use signal at
The processing of the sixth case is performed.

In the first case, in the case of the common channel use signal at time Tn-1 and the common channel use signal at time Tn, the channel switching instruction signal "none / common" indicating that the used common channel is not changed. Is generated.

In the second case, in the case of a common channel use signal at time Tn-1 and a switching prediction signal at time Tn, a channel indicating that the used common channel is predicted to be changed to an individual channel. A switching instruction signal "prediction / common" is generated.

In the third case, in the case of a switching prediction signal at time Tn-1 and an individual channel use signal at time Tn, a channel switching instruction signal "common to individual" indicating that the common channel has been changed to the individual channel is transmitted. appear.

In the fourth case, in the case of the dedicated channel use signal at time Tn−1 and the dedicated channel use signal at time Tn, the channel switching instruction signal “none / individual” indicating that the used individual channel is not changed. Is generated.

In the fifth case, in the case of a dedicated channel use signal at time Tn-1 and a switching prediction signal at time Tn, a channel indicating that the used dedicated channel is predicted to be changed to a common channel. A switching instruction signal "prediction / individual" is generated.

In the sixth case, in the case of a switching prediction signal at time Tn−1 and a common channel use signal at time Tn, a channel switching instruction signal “individual → common” indicating that the individual channel has been changed to the common channel. appear.

Each time the packet data is received from the packet data assembling means 101, the link control means 104 refers to the channel switching instruction signal of the corresponding channel received from the channel switching determining means 103, and adds the user channel number and the user A sequence number is added for each channel, which is incremented by 1 in units of packet data,
A process of writing to the transmission waiting buffers 105-0 to 105-n described below is performed.

The processing operation of the link control means 104 will be described with reference to the flowchart of FIG.

However, in the following description, the channel used at the time of call connection is assumed to be a common channel as an initial state. In the case of an individual channel, the same operation is performed by replacing "common" with "individual".

In step ST200, it is determined whether or not the used channel is an individual channel. As a result of this determination, if the channel is a common channel, the process proceeds to step ST201, and if the channel is an individual channel, the process proceeds to step ST206.

In step ST201, when the used channel is a common channel, that is, when the channel switching instruction signal is "none / common" in the first case, the packet data is written into the transmission waiting buffer 105-0 for the common channel.

In step ST202, it is determined whether or not there is a possibility of switching the common channel which is a used channel. If the result of this determination is not, the process returns to step ST201, and if there is, the process proceeds to step ST202.

In step ST203, when there is a possibility of switching the common channel, that is, in the case of the channel switching instruction signal “prediction / common” of the second case, the packet data is copied and the transmission wait buffer 106-
0 and the corresponding user channel i for the dedicated channel (i = 1
The same packet data is respectively written in the transmission waiting buffer 105- (i) corresponding to .about.n).

In step ST204, it is determined whether or not there is a switching instruction from the common channel to the individual channel. If the result of this determination is absent, the process returns to step ST203, and if there is, the process proceeds to step ST205.

In step ST205, when there is an instruction to switch from the common channel to the individual channel, that is, in the case of the channel switching instruction signal "common to individual" in the third case, the individual channel corresponding to the user channel (i) is used. The packet data is written into the transmission waiting buffer 105- (i).

In step ST206, if the channel to be used is an individual channel, that is, if the channel switching instruction signal is "none / individual" in the fourth case, the channel corresponds to the user channel i (i = 1 to n) for the individual channel. The packet data is written into the transmission waiting buffer 105- (i).

In step ST207, it is determined whether or not there is a possibility of switching the individual channel which is a used channel. If the result of this determination is absent, the process returns to step ST206, and if there is, the process proceeds to step ST208.

In step ST208, when there is a possibility of switching the individual channel, that is, in the case of the fifth case channel switching instruction signal “prediction / individual”, the packet data is copied and the transmission wait buffer 106-
0 and the corresponding user channel i for the dedicated channel (i = 1
The same packet data is respectively written in the transmission waiting buffer 105- (i) corresponding to .about.n).

In step ST209, it is determined whether or not there is an instruction to switch from an individual channel to a common channel. If the result of this determination is absent, the process returns to step ST208, and if there is, the process proceeds to step ST210.

In step ST210, if there is an instruction to switch from the dedicated channel to the common channel, that is, if the channel switching instruction signal “individual → common” in the sixth case, the packet is sent to the transmission waiting buffer 106-0 for the common channel. Write data.

By such an operation, the same packet data is transmitted to the individual channel and common channel transmission waiting buffers 105-0 to 105-n before the channel switching.
Can be stored.

Next, buffer reading means 106-0 to 10
The 6-n channel switching operation will be described with reference to FIG.
FIG. 3 is a timing chart for explaining an operation example in a case where channel switching is performed from an individual channel to a common channel.

Buffer reading means 106-0 to 106-n
Reads packet data in the transmission waiting buffers 105-0 to 105-n at every unit time τ defined by the radio frame shown in FIG. 3 and responds to a channel switching instruction signal received from the channel switching determining unit 103. The channel switching operation described below is performed.

As shown by reference numeral 301 in FIG.
In the case of the channel switching instruction signal “none / individual” of the first case, the buffer reading means 106-
(I) is a transmission waiting buffer 105-for an individual channel.
The packet data in (i) is read and transmitted to the wireless transmission path 507 via the dedicated channel baseband signal processing means 107 as shown in (b).

As shown by reference numeral 302 in (a), in the case of “prediction / individual” in the fifth case, the buffer reading means 106-(i) for the individual channel sets the buffer 105- The packet data and the packet data in (i) are read out and transmitted to the wireless transmission path 507 via the dedicated channel baseband signal processing means 107.
The read packet data and the channel number and sequence number added to the packet data are notified to the buffer read means 106-0 for the common channel.

The buffer reading means 106-0 for the common channel which has received the notification transmits the codes 303 and 304 of (b).
As shown by, the packet data matching the channel number (i) and the sequence number according to the notification are deleted from the common channel transmission waiting buffer 105-0.

Next, although not shown in FIG. 3, in the case of the first case of the channel switching instruction signal “none / common” or the second case of “prediction / common”, the common channel buffer reading means 106- 0 reads out the packet data in the transmission waiting buffer 105-0, transmits it to the wireless transmission path 507 via the common channel baseband signal processing means 108, and adds the channel number and sequence number added to the read out packet data. To the corresponding individual channel buffer reading means 106- (i).

Buffer reading means 106 for individual channel
In (i), the packet data matching the channel number (i) and the sequence number notified from the buffer reading means 106-0 is deleted from the transmission waiting buffer 105- (i).

Next, in the case of the channel switching instruction signal “common → individual” in the third case, the buffer reading means 106-0 for the common channel transmits the channel (i) of the channel (i) remaining in the transmission waiting buffer 105-0. Delete all packet data.

The individual channel buffer reading means 106- (i) reads the packet data from the transmission waiting buffer 105- (i) and sends it to the individual channel baseband signal processing means 107.

Next, as indicated by reference numeral 305 in FIG. 3, in the case of the channel switching instruction signal “individual → common” in the sixth case, buffer reading means 106- (i) for individual channel.
The packet data of the channel (i) remaining in the transmission waiting buffer 105- (i) and the
All are deleted as indicated by 6,307.

Buffer reading means 106 for common channel
-(0) indicates the transmission waiting buffer 1 as shown in (b).
The packet data and the packet data are read from 05-0 and transmitted to the wireless transmission path 507 via the common channel baseband signal processing means 108.

The common channel baseband signal processing means 108 reads the packet data from the transmission waiting buffer 105- (i), performs error correction code processing and modulation processing, and sends it to the transmission amplifier 611.

The dedicated channel baseband signal processing means 107 reads the packet data from the transmission waiting buffer 105-0, performs error correction code processing and modulation processing, and sends it to the transmission amplifier 611. Then, the transmission amplifier 611 amplifies the received data and transmits it to the wireless transmission path 507.

Next, such a wireless packet communication device 1
The configuration of the receiving unit 00 will be described with reference to FIG. However,
In FIG. 4, parts corresponding to the respective parts in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The receiving section 600 shown in FIG. 4 includes a channel separation section 601, a common channel baseband signal processing section 602, an individual channel baseband signal processing section 603, a channel multiplexing section 604, a packet decomposing section 605.

The demodulation means 606 is provided in the base station 50
4 to extract encoded data by demodulating wireless data received from the wireless transmission path 507.

The channel separating means 601 is
6 separates the encoded data from the common channel and the individual channels.

The common channel baseband signal processing means 602 and the individual channel baseband signal processing means 6
Numeral 03 is for receiving the encoded data from the channel separation means 601 and decoding it to extract the packet data.

The channel multiplexing means 604 multiplexes the packet data from the common channel baseband signal processing means 602 or the individual channel baseband signal processing means 603.

The packet decomposing means 605 is for assembling the packet data multiplexed by the channel multiplexing means 604 into a frame according to the transmission system of the wired transmission path 505.

In such a configuration, the demodulation means 606
In, the coded data is extracted by demodulating the wireless data received from the wireless transmission path 507, and the coded data is output to the channel separation means 601.

In the channel separation means 601, the encoded data is separated into a common channel and an individual channel, and the corresponding common channel baseband processing means 602
Alternatively, it is sent to the dedicated channel baseband processing means 603.

Common channel baseband processing means 60
The packet data is extracted by decoding the encoded data in the baseband processing unit for 2 or individual channel 603, and the packet data is multiplexed in the channel multiplexing unit 604 and output to the channel separation unit 601. Is done.

In the channel separating means 601, the multiplexed packet data is decomposed, and a frame corresponding to the wire transmission system (for example, A when the ATM transmission system is used).
(TM cell), and then transmitted to the wire transmission line 505 via the wire transmission line terminating means 610.

As described above, according to radio packet communication apparatus 100 of the present embodiment, packet data assembling means 10
In step 1, the packet data of the common channel used by the plurality of mobile station devices 501 and 502 or the dedicated channel used individually is restored, and the traffic amount measuring means 102 is restored.
Then, the traffic amount of the restored packet data is measured, and the channel switching determination means 103 predicts the switching from the common channel to the dedicated channel or vice versa based on the measured traffic amount.
Then, when the previous switching is predicted, the restored packet data is duplicated and stored in the common and individual transmission waiting buffers 105-0 to 105-n, and the buffer reading means 106-0 to 106-n. n, when the packet data is read from the common transmission wait buffer 105-0, the same packet data is transferred to the individual transmission wait buffer 10-0.
5-1 to 105-n, or the same packet data is deleted from the common transmission wait buffer 105-0 when the packet data is read from the individual transmission wait buffers 105-1 to 105-n. Then, the packet data read out in this way is configured to be transmitted to the wireless transmission path 507 via the individual channel baseband signal processing unit 107 or the common channel baseband signal processing unit 108.

This eliminates the need to transfer the packet data remaining in the transmission waiting buffer of the switching source wireless channel to the transmission waiting buffer of the switching destination wireless channel when the channel switching is performed. The packet transmission delay is eliminated, and the packet data accumulation buffer conventionally required to wait for packets at the time of transfer can be omitted, so that the amount of hardware can be reduced.

Further, the link control means 104 duplicates the restored packet data and
0 to 105-n, a user channel number is added to the packet data, and a sequence number is added to the packet data for each user channel number. Alternatively, when deleting the same packet data read from one of the individual transmission waiting buffers 105-0 to 105-n from the other, the packet data having the same user channel number and sequence number as the read packet data is deleted. Since the packet data is deleted, other packet data is not erroneously deleted, and the same residual packet data as the transmission packet data can be reliably deleted.

The channel separating means 601 separates the data demodulated after reception from the radio transmission path into a common channel and an individual channel, and separates the separated data into the individual channel baseband signal processing means 603 or Decoding by the common channel baseband signal processing means 602,
The decoded packet data is transmitted to the channel multiplexing means 60.
4, the multiplexed packet data is assembled by the packet decomposing means 605 into a frame signal corresponding to the transmission method of the wired transmission path 505 and transmitted to the wired transmission path 505. By simultaneously receiving packet data from the individual channels, it is possible to continuously receive packet data without data loss even when the channel is switched by the transmission unit.

In the above description, an example is shown in which wireless packet communication apparatus 100 is used for base station apparatus 504 of a mobile communication system, but it may be used for a mobile station apparatus.

[0109]

As described above, according to the present invention,
The hardware scale can be reduced by reducing the packet transfer delay at the time of channel switching from individual to common or vice versa, and reducing the amount of memory of a buffer that waits for packet data transmission.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a wireless packet communication device according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of a link control unit in the wireless packet communication device according to the embodiment.

FIG. 3 is a timing chart for explaining a channel switching operation of a buffer reading unit in the wireless packet communication device according to the embodiment, and for explaining an operation example in a case where a channel is switched from an individual channel to a common channel.

FIG. 4 is a block diagram showing a configuration of a receiving unit of the wireless packet communication device according to the embodiment.

FIG. 5 is a block diagram showing a configuration of a mobile communication system showing a base station device using a conventional wireless packet communication device.

FIG. 6 is a block diagram showing a configuration of a conventional wireless packet communication device.

[Explanation of symbols]

REFERENCE SIGNS LIST 100 wireless packet communication apparatus 101 packet data assembling means 102 traffic amount measuring means 103 channel switching determining means 104 link control means 105-0 common channel transmission waiting buffer 105-1 to 105-n individual channel transmission waiting buffer 106-0 Buffer reading means for common channel 106-1 to 106-n Buffer reading means for individual channel 107,608 Baseband signal processing means for individual channel 108,609 Baseband signal processing means for common channel 501,502 Mobile station apparatus 504 Base Station device 505 Wired transmission path

 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 5K030 GA06 HB28 HC09 HD09 JL01 KX11 LC18 LE16 MB09 MB13 5K033 AA04 CC02 DA19 DB13 5K034 AA11 DD03 EE03 HH21 NN16 5K067 AA42 BB21 CC08 DD34 EE02 EE10 HH23 EJ03 CC03 DD03 EE04 HH34 JJ12 KK31

Claims (11)

[Claims] When a common channel used in common by a plurality of terminal devices or a dedicated channel used individually is predicted to be switched from one to another,
Duplicating the data of the common or individual channel, storing the data in a common and individual storage unit that waits for data transmission,
A wireless packet transmission device having a function of deleting the same data from the other storage means when the stored data is read from one storage means to the wireless transmission path. 2. An assembling unit for restoring data of a common channel commonly used by a plurality of terminal devices or an individual channel used individually, a measuring unit for measuring a traffic amount of the restored data, Determining means for predicting switching from the common channel to the dedicated channel or vice versa based on the traffic amount, common and individual storage means for waiting for data transmission, and when the switching is predicted, the restored Control means for copying the copied data and storing the copied data in the common storage means and the individual storage means,
The same data is deleted from the individual storage unit when data is read from the common storage unit, or the same data is deleted from the common storage unit when data is read from the individual storage unit. A wireless packet transmitting apparatus comprising: a reading unit; and a processing unit that encodes data read by the reading unit and transmits the encoded data to a wireless transmission path. 3. The control means, when duplicating the restored data and storing it in the common storage means and the individual storage means,
A user channel number is added to the data and a sequence number is added to data for each user channel number and stored.
The processing unit, when deleting the same data read from one of the common storage unit and the individual storage unit from the other, deletes the same data of the user channel number and the sequence number as the read data. The wireless packet transmission device according to claim 2, wherein: 4. Demodulation means for receiving and demodulating information from a wireless transmission path, separating means for separating the demodulated data into a common channel and an individual channel, and processing means for decoding the separated data. Multiplexing means for multiplexing the decoded data, and receiving data from both the common channel and the individual channel at the same time. 5. A wireless packet communication device comprising a combination of the wireless packet transmitting device according to claim 1 and the wireless packet receiving device according to claim 4. 6. A base station device comprising the wireless packet communication device according to claim 5. 7. A mobile station device comprising the wireless packet communication device according to claim 5. 8. The base station apparatus according to claim 6, and claim 7.
A mobile communication system comprising the mobile station device according to any one of the preceding claims. 9. When switching between a common channel commonly used by a plurality of terminal devices and an individual channel used individually according to a traffic amount of data, the data of the common or individual channel is copied in advance. Then, the duplicated data is stored in a common and individual storage unit that waits for transmission, and when this stored data is read out from the common storage unit to a wireless transmission path, the same data as the read out data is read out. A wireless packet transmitting method, wherein the same data as the read data is deleted from the common storage means when the data is deleted from the individual storage means and read from the individual storage means to the wireless transmission path. 10. Receiving and demodulating information from a wireless transmission path, separating the demodulated data into a common channel and an individual channel, decoding the separated data, and multiplexing the decoded data. A wireless packet receiving method comprising: assembling the multiplexed data into a frame signal corresponding to a transmission method of a wired transmission path; and transmitting the frame signal to the wired transmission path. 11. A wireless packet communication method comprising performing packet communication by the wireless packet transmitting method according to claim 9 and the wireless packet receiving method according to claim 10.