JP3519709B2 - Mobile communication control device and mobile communication control method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system compatible with a packet communication system capable of transmitting packets (signals) to a plurality of mobile stations via a plurality of packet communication channels (radio channels). The present invention relates to a control device and a mobile communication control method.

[0002]

2. Description of the Related Art Conventionally, as a packet communication method capable of transmitting a packet to a mobile station via a plurality of packet communication channels, a PDC (Personal D
(Digital Cellular) packet communication system is known. This PDC packet communication system uses TDMA (Time Division M) in a wireless transmission path.
has adopted the multiple access method,
A configuration having three packet communication channels on one wireless carrier is adopted.

Currently, as a mobile station compatible with the PDC packet communication system, a mobile station capable of simultaneously accessing all three packet communication channels (multi-channel mobile station).
And a mobile station (single channel mobile station) capable of accessing only one packet communication channel has been put into practical use.

Usually, in a mobile communication network adopting the PDC packet communication system, multi-channel mobile stations and single-channel mobile stations having different transmission capabilities are mixed on the same radio carrier for packet communication. .

Generally, in the packet communication system as described above, since a plurality of mobile stations share a wireless transmission path, it is essential to control the transmission signal (packet) speed according to the congestion degree of the wireless transmission path. It is said that.

FIG. 5 shows a schematic configuration of a mobile communication controller 20 adopting a conventional PDC packet communication system. This mobile communication control device 20 has both a function as a radio base station and a function as a packet switch.

Mobile communication controller 20 according to the prior art
Specifically, as shown in FIG.
When a transmission signal speed control unit 22 ₀ to 22 _3, a signal storage unit 23 ₀ to 23 _2, the transmission processing unit 24 ₀ to 24
_2, a modem part 25 ₀ to 25 _2, and the transmission signal speed determining section 26, the signal selector 27 comprises a signal addition unit 28, and a signal transmission section 29.

The signal receiving section 21 includes a transmission signal speed control section 2
2 ₀ to which is connected to the 22 _3, to determine the receive signal transmitted (packet) from the Internet and packet network such an intranet, a mobile station to exchange process on the received signal type, the appropriate transmission and transmits the signal speed control unit 22 ₀ to 22 _3.

[0009] The transmission signal speed control unit 22 ₀ to 22 _3,
A signal receiving unit 21 and the signal storage unit 23 ₀ to 23 ₂ which is connected to the transmission signal rate determining unit 26, which performs transmission signal speed control based on the transmission signal rate determined by the transmission signal speed determining section 26 Is. Transmission signal speed control unit 2
2 ₀ to 22 _3, specifically, is provided with a buffer, a signal transmitted from the signal receiving unit 21 temporarily stores in the buffer, the transmission signal determined by the transmission signal speed determining section 26 a speed, and transfers the stored signal, corresponding to the signal storage unit 23 ₀ to 23 _2.

[0010] The transmission signal speed control unit 22 ₀ to 22 _2,
A transmission signal speed control unit for a single channel the mobile station, the transmission signal speed control unit 22 ₃ is a transmission signal speed control unit for a multi-channel mobile station. That is, the transmission signal speed control unit 22 ₀ to 22 ₃ are in the single-channel mobile station unit of each packet communication channel, and provided in a multi-channel mobile station unit. The transmission signal speed control unit 22 _3, signal storage unit 2 via a signal distributing section 27
3 ₀ to be connected to the 23 _2.

Signal storage unit 23₀Through 23_TwoIs the transmitted signal
Speed control unit 22₀Through 22_ThreeAnd the transmission processing unit 24₀Through 2
Four_TwoConnected to the signal distribution unit 27 and each packet
To send a signal to the mobile station via the communication channel
In addition, the transmission signal speed control unit 22₀Through 22_ThreeOr signal distribution
The signal transferred from the unit 27 is temporarily stored and stored.
Signal that is compatible with the transmission speed of the packet communication channel.
So that the transmission processing unit 24 ₀Through 24_TwoTransfer to. signal
Storage unit 23₀Through 23_TwoIs a packet communication channel C
It is associated with each of h # 0 to Ch # 2.

Transmission processing unit 24₀Through 24_TwoStore the signal
Part 23₀Through 23_TwoAnd modulator / demodulator 25 ₀Through 25_TwoContact with
Signal storage unit 23₀Through 23_TwoSent by
The encoded signal is encoded and then encoded.
The demodulated signal 25₀Through 25_TwoSend to.

[0013] The modem unit 25 ₀ to 25 ₂ is connected to a transmission processing unit 24 ₀ to 24 ₂ and the signal addition unit 28 performs modulation processing on transmitted from the transmission processing unit 24 ₀ to 24 ₂ signal The modulated signal is transmitted to the signal adding section 28.

[0014] The transmission signal speed determining section 26, transmission signal speed control unit 22 ₀ to 22 ₃ and the signal storage unit 23 ₀ to 23 ₂
Is connected to the bets in accordance with the total value of the signal (packet) amount stored in the signal storage unit 23 ₀ to 23 _2, to determine the transmission signal rate, determined second transmission signal speed transmission signal and it transmits the speed control unit 22 ₀ to 22 _3. Here, the transmission signal rate determined is for single channel transmission for the mobile station signal speed control unit 22 ₀ to 22 ₂ "(1/3) X ', for a multi-channel mobile station transmission signal speed control unit “X” for 22 ₃ .

The signal selector 27 is connected to the transmission signal speed control unit 22 ₃ and the signal storage unit 23 ₀ to 23 ₂ for multi-channel mobile station, the transmission signal speed control unit for a multi-channel mobile station 22 ₃ than distributed to each transmitted signal of the signal storage unit 23 ₀ to 23 ₂ at a transmission signal rate "X".

The distribution ratio at this time is X0: X1: X
2 = 1: 1: 1 (X0: signal distribution ratio for the signal storage unit 23 ₀ , X1: signal distribution ratio for the signal storage unit 23 ₁ , X2: signal distribution ratio for the signal storage unit 23 ₂ ). That is, the signal selector 27, the signal transmitted in the transmission signal speed "X" from the transmission signal speed control unit 22 ₃ for multi-channel mobile station, the signal stored in the transmission signal speed "(1/3) X ' distributed to each of the parts 23 ₀ to 23 _2.

The signal addition unit 28, modem unit 25 _0-2
5 ₂ is connected to the signal transmitting section 29, the modem unit 2
5 ₀ to adding the signals transmitted from the 25 _2, and transmits the added signal to the signal transmission unit 29.

The signal transmitter 29 is connected to the signal adder 28 and has a radio antenna 29 ₁ . The signal transmitting unit 29 amplifies the signal transmitted from the signal adding unit 28 and transmits the signal via the wireless antenna 29 ₁ .

[0019]

However, in the above-mentioned prior art, for the multi-channel mobile station having a high transmission capacity and all the single-channel mobile stations, the total number of radio carrier units consisting of three packet communication channels is used. Efficient transmission signal rate control is performed based on the traffic (signal amount).

Therefore, in the above-mentioned conventional technique, when the traffic bias between the packet communication channels is small, optimum transmission signal amount control is performed for all mobile stations (single channel mobile station and multi-channel mobile station). However, if there is a large traffic bias between the packet communication channels, the traffic may be too large or too small depending on the packet communication channels. There is a problem that it is not possible to perform optimal transmission signal amount control according to traffic.

For a single-channel mobile station, transmission signal rate control is performed according to the signal amount (traffic) of the corresponding packet communication channel unit, and for a multi-channel mobile station, a packet communication channel. A method of individually controlling the transmission signal rate for each is conceivable, but this method has a problem that the transmission signal rate control on the multi-channel mobile station becomes heavy.

Therefore, the present invention has been made in view of the above points, and even when a signal (packet) is transmitted to the mobile station side, even if there is a large deviation in traffic between packet communication channels. An object of the present invention is to provide a mobile communication control device and a mobile communication control method capable of performing optimum transmission signal speed control for all mobile stations while suppressing the burden of transmission signal speed control. .

[0023]

A mobile communication control apparatus and a mobile communication control method according to the present invention transmit signals to a plurality of mobile stations via a plurality of radio channels.
The plurality of mobile stations are configured by a first mobile station capable of communicating via one of the plurality of wireless channels and a second mobile station capable of simultaneously communicating via all of the plurality of wireless channels. And storing a signal addressed to the first mobile station and a signal addressed to the second mobile station that are associated with each of the radio channels and that are transmitted over the radio channel. A first transmission signal rate for transmitting a signal addressed to the first mobile station to the signal storage means according to the signal storage means and the signal amount stored in the signal storage means. Transmission signal rate determination means, first transmission signal rate control means for transmitting a signal addressed to the first mobile station to the signal storage means at the determined first transmission signal rate, and all the signals Signal amount stored in the storage means Second transmission signal rate determining means for determining a second transmission signal rate for transmitting a signal addressed to the second mobile station to each of the signal storage means according to the total; and the determined second transmission signal rate. A second transmission signal speed control means for transmitting a signal addressed to the second mobile station and a second transmission signal speed transmitted from the second transmission signal speed control means according to the transmission signal speed. A signal distribution unit that receives a signal and distributes a signal addressed to the second mobile station to each of the signal storage units according to a ratio of the first transmission signal rates determined for each of the signal storage units. When,
A transmission for transmitting a signal destined for the first mobile station and a signal destined for the second mobile station stored in the signal storage means via each of the radio channels associated with the signal storage means. And means.

According to this invention, the second transmission signal speed determining means assigns the second mobile station to each of the signal storing means according to the total amount of signals stored in all the signal storing means. A second transmission signal rate for transmitting a signal is determined, and the signal distribution means is configured to provide a second transmission signal rate to each of the signal storage means according to a ratio of the first transmission signal rate determined for each of the signal storage means. Since the signal addressed to the mobile station is transmitted, optimal transmission signal rate control can be performed for all mobile stations even if there is a large deviation in traffic between wireless channels (packet communication channels).

Further, according to the present invention, the second transmission signal rate determining means does not need to individually control the transmission signal rate for each radio channel (packet communication channel). The burden can be suppressed.

Further, in the above-mentioned mobile communication control device and mobile communication control method, the second transmission signal speed determination means is the sum of the first transmission signal speeds determined for each of the signal storage means. Is preferably multiplied by a predetermined weighting factor to determine the second transmission signal rate.

In this case, the second transmission signal rate determining means multiplies the sum of the first transmission signal rates determined for each of the signal storing means by a predetermined weighting factor to obtain the second transmission signal rate. Therefore, it is possible to easily adjust the speed between the transmission signal speed to the first mobile station and the transmission signal speed to the second mobile station via the same radio channel (packet communication channel). To do.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION (Configuration of Mobile Communication Control Apparatus According to Embodiment of the Present Invention) A configuration of a mobile communication system including a mobile communication control apparatus according to an embodiment of the present invention will be described with reference to the drawings. To do. FIG. 1 is a diagram showing a schematic configuration of a mobile communication system including a mobile communication control device according to this embodiment.

In this embodiment, the mobile communication control device 20 is used.
However, packet networks such as the Internet and intranet 1
A packet (signal) transmitted from, via a wireless carrier, a description will be given only when transmitting to the mobile station 10 ₀ to 10 _3. Mobile station 10 ₀ to 10 _3, located in the radio cell 2, which is managed by the mobile communication control device 20.

The mobile communication system including a mobile communication control device according to the present embodiment, as shown in FIG. 1, specifically, the mobile station 10 ₀ to 10 _3, the mobile communication control device 2
It is composed of 0 and.

Mobile station 10₀Through 10_ThreeIs a wireless carrier
Wireless communication is performed with the mobile communication control device 20 via the
It is a portable information terminal that can be used. Mobile station 10₀Through
10 _ThreeIs, for example, a mobile phone terminal, a PDA terminal, or the like.
Function to perform wireless packet communication, especially PDC packet
It has a function corresponding to the communication method.

The mobile station 10 ₀ to 10 _2, communication one packet channels Ch # 0 to Ch # 2 only accessible single channel mobile station, i.e., one of a plurality of packet communication channel (radio channel) It is a first mobile station capable of communicating via the. In addition, the mobile station 10 _3,
A multi-channel mobile station that can simultaneously access all three packet communication channels Ch # 0 to Ch # 2, that is, a second mobile station that can simultaneously communicate via all of a plurality of packet communication channels (radio channels). It is a station.

FIG. 2 shows the configuration of the above-mentioned radio carrier. This wireless carrier, as shown in FIG.
Three packet communication channels Ch # 0 according to the MA method
Through Ch # 2. Mobile station 10
₀ can access only the packet communication channel Ch # 0. Mobile station 10 ₁ can access only the packet communication channel Ch # 1. Mobile station 10 ₂ is able to access only the packet communication channel Ch # 2. Mobile station ₁₀₃ may simultaneously access all three packet communication channel Ch # 0 to Ch # 2.

The mobile communication control device 20 is connected to a radio base station.
Functions as a packet switch and a function as a packet switch.
It The mobile communication control device 20, as shown in FIG.
Physically, the signal receiving unit 21 and the transmission signal speed control unit 22
₀Through 22_ThreeAnd the signal storage unit 23₀Through 23_TwoAnd send
Processing unit 24₀Through 24_TwoAnd the modulation / demodulation unit 25₀Through 25 _Two
And the transmission signal speed determination unit 26₀Through 26_ThreeAnd signal distribution
A unit 27, a signal addition unit 28, and a signal transmission unit 29 are provided.
To do.

Mobile communication control device 20 according to the present embodiment
Only the constituent elements different from the constituent elements of the mobile communication control device 20 according to the related art described above will be described.

[0036] In this embodiment, the signal storage unit 23 ₀ to 23 _2, a radio channel (packet communication channel)
And stores a signal addressed to the first mobile station (single channel mobile station) and a signal addressed to the second mobile station (multi-channel mobile station), which are associated with each of the It constitutes a signal storage means.

[0037] The transmission signal speed determining unit 26 ₀ to 26
₂ corresponds to the amount of signals stored in the signal storage means,
A first transmission signal rate determining means for determining a first transmission signal rate for transmitting a signal addressed to the first mobile station to the signal storage means is configured. The transmission signal speed control unit 22 _0-2
2 _2, a first transmission signal rate, constitute the first transmission signal speed control means for transmitting a first signal addressed to the mobile station of the signal storage means.

[0038] The transmission signal speed determination unit 26 _3, first transmits in response to the total amount of signal stored in all the signal storage unit, to each of the signal storage means a second signal addressed to the mobile station of A second transmission signal rate determining means for determining the second transmission signal rate is configured. In addition, the transmission signal speed control unit 22
_{The 3} and the signal distribution unit 27 constitute second transmission signal speed control means for transmitting a signal addressed to the second mobile station to each of the signal storage means in accordance with the second transmission signal speed.

Further, the transmission processing unit 24 ₀ to 24 _2, the modem unit 25 ₀ to 25 _2, signal addition unit 28 and the signal transmission unit 29 via the respective radio channel associated with the signal storage unit, signal First stored in the storage means
Of the mobile station and the signal for the second mobile station.

Further, the signal distribution unit 27 receives the signal transmitted by the second transmission signal speed control means at the second transmission signal speed, and determines the first transmission signal for each of the signal storage means. The signal distribution means is configured to distribute the signal addressed to the second mobile station to each of the signal storage means according to the speed ratio.

Mobile communication control device 20 according to the present embodiment
So unlike the mobile communication control device 20 according to the prior art, single-channel mobile station 10 ₀ to 10 ₂ (for packet communications channels Ch # 0 to Ch # 2) transmits the signal speed determining unit 26 ₀ to 26 _2, and the transmission signal speed determining section 26 ₃ of the multi-channel for the mobile station 10 ₃ are provided.

Transmission signal speed determination unit 26₀Through 26_TwoIs
Transmission signal speed control unit 22₀Through 22 _TwoAnd signal storage 23
₀Through 23_TwoConnected to the signal distribution unit 27 and
Glu-channel mobile station 10₀Through 10_Two(For packet communication
Transmission signal rate determination for channels Ch # 0 to Ch # 2)
It is a department. Transmission signal speed determination unit 26₀Through 26_TwoIs that
The signal storage unit 23, respectively₀Through 23_TwoCurrently stored in
Based on the amount of signal (packet) present, then the transmitted signal
Speed control unit 22₀Through 22_TwoTo signal storage unit 23₀Through
23_TwoThe first transmission signal, which is the transmission speed for transmitting a signal to
No. speed (Y0 to Y2) "is determined.

The transmission signal speed determining unit 26 ₀ to 26 _2,
First transmits a signal speed "Y0 to Y2" in the determined transmission signal speed control unit 22 ₀ to 22 ₂ and the transmission signal speed determining section 26 ₃ of the multi-channel for the mobile station 10 ₃ and the signal selector 2
7 and send.

The transmission signal speed determining unit 26 _3, transmission signal speed control unit 22 ₃ and the transmission signal speed determining unit 26 ₀ to 26 ₂
A transmission signal speed determining section of the multi-channel for the mobile station 10 ₃ which is connected to and. Transmission signal speed determination unit 26
_3, the first transmission sum signal speed "Y0 to Y2" as determined by the transmission signal speed determining unit 26 ₀ to 26 ₂ for each single-channel mobile station 10 ₀ to 10 for ₂ "Y0 +
Y1 + Y2 in response to "a transmission rate for transmitting a signal from the transmission signal speed control unit 22 ₃ in the signal selector 27" second
Transmission signal speed (W × (Y0 + Y1 + Y2)) ”, and the determined second transmission signal speed“ W × (Y0 + Y1 +)
Y2) "to be transmitted to the transmission signal speed control unit 22 _3.

The transmission signal rate determining unit 26 for the single channel mobile station 10 ₀ (packet communication channel Ch # 0)
The first transmission signal rate determined by ₀ is "Y0",
The _first transmission signal rate determined by the transmission signal rate determination unit 26 ₁ for the single channel mobile station 10 ₁ (packet communication channel Ch # 1) is “Y1”, and the single channel mobile station 10 ₂ (packet communication channel Ch # 2)
The determined by the transmission signal speed determining section 26 ₂ of use 1
Transmitting the signal speed is "Y2" in the transmission signal speed determining unit 26 ₃ for multi-channel mobile station 10 _3, "W × the second transmission signal speed for a multi-channel mobile station 10 ₃
(Y0 + Y1 + Y2) ”is determined. Where "W"
Is a weighting coefficient, and is a transmission signal speed control unit 22 ₃
This is for adjusting the speed of transmitting a signal from the signal distribution unit 27 to the signal distribution unit 27.

The transmission signal speed control unit 22 ₀ to 22 _2,
Signal receiving unit 21 and the transmission signal speed control unit 22 ₃ and the signal storage unit 23 ₀ to 23 ₂ and the transmission signal speed determining section 26 _0-2
6 ₂ and are connected to, respectively, the transmission signal first transmitted at signaling rate "Y0 to Y2" of which is transmitted by the speed determination unit 26 ₀ to 26 _2, signal the signal storage unit received from the signal receiving unit 21 23 and transmits to the ₀ to 23 _2.

The transmission signal speed control unit 22 ₃ is connected to the signal receiving unit 21 into a transmission signal rate determining unit 26 ₃ and the signal selector 27, a second transmitted by the transmission signal speed determining unit 26 ₃ Transmission signal speed of “W × (Y0 + Y1 + Y
2) ”, the signal received from the signal receiving unit 21 is transmitted to the signal distributing unit 27.

The signal distribution unit 27 includes the transmission signal speed control unit 2
Two_ThreeAnd signal storage 23₀Through 23_TwoAnd transmission signal speed determination
Part 26₀Through 26_TwoConnected with and the transmission signal speed
Control unit 22_ThreeThe signal transmitted by the
Fixed part 26₀Through 26_TwoEach packet communication sent by
Corresponding to the first transmission signal rate “Y0 to Y2” of the working channel.
The distribution ratio “Y0: Y1: Y2” indicates that the signal
Storage unit 23₀Through 23 _TwoAllocate to each.

For example, the signal distribution unit 27 to the signal storage unit 2
3 transmission rate of ₀ to 23 ₂ signals are distributed to each of the (packet communication channel Ch # 0 to Ch # 2) are as follows. Hereinafter, the signal storage unit 23
_The transmission rate for 0 is Z0, the transmission rate for the signal storage section 23 ₁ is Z1, and the transmission rate for the signal storage section 23 ₂ is Z2.

Z0 = {W × (Y1 + Y2 + Y3)} ×
{Y0 / (Y1 + Y2 + Y3)} = W × Y0 Z1 = {W × (Y1 + Y2 + Y3)} × {Y1 / (Y1
+ Y2 + Y3)} = W × Y1 Z2 = {W × (Y1 + Y2 + Y3)} × {Y2 / (Y1
+ Y2 + Y3)} = W × Y2 When W = 1, as a result, the signal classifier 27
Payment section 23₀Through 23_TwoAssigned to each of
The transmission speed of the signal is ₀Through 2
Two_TwoTo signal storage unit 23₀Through 23_TwoFor each of
Becomes equal to the transmission speed of the signal transmitted.

In this embodiment, the mobile communication system
The mobile communication control device 20 has a function as a wireless base station and a function as a packet switch.
The wireless base station and the packet switch may be provided separately from the mobile communication control device 20. In this case, the above-mentioned components may be provided in the radio base station instead of being provided in the mobile communication control device 20, or may be provided in the packet switch.

(Operation of Mobile Communication Control Apparatus According to this Embodiment) The operation of the mobile communication control apparatus having the above configuration will be described with reference to FIG. 4, in a mobile communication system including a mobile communication control device according to the present embodiment, a signal transmitted from the packet network 1, the mobile communication control device 20, the mobile station 10 ₀ via the wireless carrier
10 is a flow chart showing the operation of transmitting to 10 ₃ to 10.

As shown in FIG. 4, in step 401, the signal receiving unit 21 receives a signal (packet) from the packet network 1. The signal receiving unit 21 performs the exchange process on the received signal, the transmission signal speed control unit 22 ₀ to 22 ₃ corresponding to transmit this signal.

[0054] In step 402, the transmission signal speed determining unit 26 ₀ to 26 ₂ for a single channel the mobile station,
According to a signal amount stored in each of the signal storage unit 23 ₀ to 23 _2, transmission signal speed control unit 22 ₀ to 22
₂ to the signal storage unit 23 ₀ to 23 ₂ is the rate at which to transmit the signal "first transmission signal speed (Y0 to Y2)" is determined and the determined first transmission signal speed transmission of "Y0 to Y2" and transmits the signal speed control unit 22 ₀ to 22 _2.

[0055] In step 403, the transmission signal speed control unit 22 ₀ to 22 _2, the first transmission at a signaling rate "Y0 to Y2" of which is transmitted by the transmission signal speed determining unit 26 ₀ to 26 _2, the signal reception section 21 the signals received from and transmitted to the signal storage unit 23 ₀ to 23 _2.

[0056] In step 404, the transmission signal speed determining unit 26 ₀ to 26 ₂ for a single channel the mobile station,
A first transmission signal speed "Y0 to Y2" described above, and transmits the transmission signal speed determining section 26 ₃ for multi-channel mobile station. Transmission signal rate determination unit 26 for multi-channel mobile station
_3, the first transmission sum signal speed "Y0 to Y2" as determined by the transmission signal speed determining unit 26 ₀ to 26 ₂ for each single-channel mobile station 10 ₀ to 10 for ₂ "Y0 +
Depending on Y1 + Y2 ", the rate at which the" second transmission signal rate for transmitting a signal from the transmission signal speed control unit 22 ₃ to the signal distributing section 27 (W × (Y0 + Y1 + Y2)) "were determined,
The determined second transmission signal speed “W × (Y0 + Y1 + Y
2) "and transmits the transmission signal speed control unit 22 _3.

In step 405, multi-channel
Transmission signal speed control unit 22 for mobile station _ThreeBut the transmitted signal speed
Deciding unit 26_ThreeThe second transmission signal speed "W transmitted by
× (Y0 + Y1 + Y2) ”received from the signal receiving unit 21
The generated signal is transmitted to the signal distribution unit 27. And the signal
The distribution unit 27 uses the transmission signal speed control unit 22._ThreeSent by
The transmitted signal is transmitted to the transmission signal speed determination unit 26.₀Through 26_TwoBy
The first transmission signal of each packet communication channel transmitted by
Allocation ratio "Y0:" according to the speed "Y0 to Y2"
Y1: Y2 ”, the signal storage unit 23₀Through 23_Twoof
Distribute to each.

In step 406, the signal storage unit 23
₀ to 23 _2, and stores the signals transmitted by the transmission signal speed determining unit 26 ₀ to 26 ₂ and the signal selector 27 for a single channel the mobile station. Then, the signal storage unit 23 ₀
To 23 _2, channel Ch # 0 to C for packet communications
to match the transmission rate of the h # 2, and transfers the signal that is stored in the transmission processing unit 24 ₀ to 24 _2.

In step 407, the transmission processing section 24
₀ to 24 _2, performs encoding processing on the signal transferred by the signal storage unit 23 ₀ to 23 _2, and transmits the signal subjected to coding processing to the modem unit 25 ₀ to 25 _2.

[0060] In step 408, the modem unit 25 ₀
Or 25 ₂ performs modulation processing on the signal transmitted by the transmission processing unit 24 ₀ to 24 _2, and transmits the signal subjected to modulation processing to the signal addition unit 28.

In step 409, the signal addition unit 28
But adds the signal transmitted by the modem part 25 ₀ to 25 _2, the signal transmission section 29 transmits the added signal to the mobile station 10 ₀ to 10 ₃ via the wireless antenna 29 _1.

By sequentially repeating the processing of steps 402 to 406, the transmission signal rate can be optimized. Specifically, the transmission signal speed determining unit 26 ₀
To 26 first transmission signal rate determined by _2, if it exceeds the transmission rate of the channel for packet communication Ch # 0 to Ch # 2, the amount of signals stored in the signal storage unit 23 ₀ to 23 ₂ Although but increases, by sequentially repeating the processing of steps 402 to 406, because this information is fed back to the transmission signal rate determining unit 26 ₀ to 26 _2, and can be optimized for transmission signal speed Become.

[0063] According to the mobile communication control device according to the present embodiment (Operation and Effect of the mobile communication control device according to the present embodiment), the transmission signal speed determining unit 26 _{3, 0} to all the signal storage section 23 A _second transmission signal rate for transmitting a signal addressed to the multi-channel mobile station 10 ₃ to each of the signal storage units 23 _{0 to} 23 ₂ is determined according to the total amount of signals stored in the signal 23 _2. Wakebe 27, in accordance with the first ratio of the transmission signal rate determined for each of the signal storage unit 23 ₀ to 23 _2, a multi-channel mobile station 10 ₃ addressed to each of the signal storage unit 23 ₀ to 23 ₂ To send a signal,
Even if the bias of traffic between the packet communication channel is large, it is possible to perform optimal transmission signal speed control to all mobile stations 10 ₀ to 10 _3.

That is, the mobile communication system according to this embodiment is
According to the control device, the signal storage unit 23₀Through 23_TwoStored in
The amount of signals to be stored is kept below a certain level, and the signal storage
23 ₀Through 23_TwoDelay in transmission signal control section
22₀Through 22_TwoTo mobile station 10₀Through 10_TwoReach
Time can be kept within a certain time.

[0065] (part that function as packet switches) transmitting signal control unit 22 ₀ to 22 ₂ and the mobile station 1
The delay time is monitored between _{0 and} 10 _2, and the retransmission control and the like is performed according to the monitoring result. Therefore, the transmission signal control units 22 _{0 to} 22 ₂ move to the mobile station 10 _0.
It is desirable to suppress the time to reach 10 to 10 ₂ within a certain time.

[0066] Further, according to the mobile communication control device of the present embodiment, since the transmission signal speed determining unit 26 _3, not be required to perform an individual transmission signal speed control for each channel for packet communication, a transmission signal The burden of speed control can be suppressed.

[0067] Further, according to the mobile communication control device according to the present embodiment, the transmission signal speed determining unit 26 _3, the sum of the first transmission signal rate determined for each of the signal storage unit 23 ₀ to 23 ₂ , the transmission signal speed and multi for determining a second transmission signal rate by multiplying the predetermined weighting factor "W", the single-channel mobile station 10 ₀ to 10 ₂ over the same packet communication channel the speed adjustment between a transmission signal rate of the channel the mobile station 10 ₃ readily to.

[0068]

As described above, according to the present invention, when a signal (packet) is transmitted to the mobile station side, the transmission signal speed can be increased even if the traffic bias between the packet communication channels is large. It is possible to provide a mobile communication control device and a mobile communication control method capable of performing optimum transmission signal rate control for all mobile stations while suppressing the control load.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a mobile communication system including a mobile communication control device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a wireless carrier used in the mobile communication control device according to the embodiment of the present invention.

FIG. 3 is a functional block diagram of a mobile communication control device according to an embodiment of the present invention.

FIG. 4 is a flowchart diagram showing an operation in which the mobile communication control device transmits a signal to a mobile station via a radio carrier in a mobile communication system including the mobile communication control device according to the embodiment of the present invention. Is.

FIG. 5 is a functional block diagram of a mobile communication control device according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Packet network 2 ... Wireless cell 10 ₀ , 10 ₁ , 10 ₂ , 10 ₃ ... Mobile station 20 ... Mobile communication control device 21 ... Signal receiving part 22 ₀ , 22 ₁ , 22 ₂ , 22 ₃ ... Transmission signal speed control Unit 23 ₀ , 23 ₁ , 23 ₂ ... Signal storage unit 24 ₀ , 24 ₁ , 24 ₂ ... Transmission processing unit 25 ₀ , 25 ₁ , 25 ₂ ... Modulation / demodulation unit 26 ₀ , 26 ₁ , 26 ₂ , 26 ₃ ... Transmission signal Speed determination unit 27 ... Signal distribution unit 28 ... Signal addition unit 29 ... Signal transmission unit 29 ₁ ... Wireless antenna

Front page continuation (72) Inventor Seigo Numajiri 2-11-1, Nagata-cho, Chiyoda-ku, Tokyo NTT Docomo Co., Ltd. (56) Reference JP-A-4-114538 (JP, A) Hei 10-336098 (JP, A) JP 2000-13306 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04L 29/08 H04Q 7/38

Claims (4)

(57) [Claims] 1. A mobile communication control device for transmitting a signal to a plurality of mobile stations via a plurality of radio channels, wherein the plurality of mobile stations are capable of communicating via one of the plurality of radio channels. A mobile communication control device configured by a first mobile station and a second mobile station capable of simultaneously communicating via all of the plurality of radio channels, the mobile communication control device being associated with each of the radio channels. And a signal storage means for storing a signal addressed to the first mobile station and a signal addressed to the second mobile station, which are transmitted via the radio channel, and a signal amount stored in the signal storage means. A first transmission signal rate determining means for determining a first transmission signal rate for transmitting a signal addressed to the first mobile station to the signal storage means, and the determined first transmission signal rate In front of the signal storage means The first transmission signal speed control means for transmitting a signal addressed to the first mobile station and the signal storage means in each of the signal storage means according to the sum of the signal amounts stored in all the signal storage means. Second transmission signal rate determining means for determining a second transmission signal rate for transmitting a signal addressed to two mobile stations; and the second transmission signal rate determining means according to the determined second transmission signal rate.
Second transmission signal speed control means for transmitting a signal addressed to the mobile station, and a signal transmitted at the second transmission signal speed from the second transmission signal speed control means, and stored in the signal storage means. Signal distribution means for allocating a signal addressed to the second mobile station to each of the signal storage means in accordance with the ratio of the first transmission signal rates determined for each, and associated with the signal storage means. Transmission means for transmitting a signal addressed to the first mobile station and a signal addressed to the second mobile station, which are stored in the signal storage means, via each of the wireless channels that are present. Mobile communication control device. 2. The second transmission signal rate determining means multiplies the sum of the first transmission signal rates determined for each of the signal storing means by a predetermined weighting factor to obtain the second transmission signal rate. The mobile communication control device according to claim 1, wherein the transmission signal speed of the mobile communication device is determined. 3. A mobile communication control method for transmitting a signal to a plurality of mobile stations via a plurality of radio channels, wherein the plurality of mobile stations are capable of communicating via one of the plurality of radio channels. A mobile communication control method comprising a first mobile station and a second mobile station capable of simultaneously communicating via all of the plurality of radio channels, the method being associated with each of the radio channels. Signal corresponding to the signal amount stored in the signal storage means storing the signal addressed to the first mobile station and the signal addressed to the second mobile station, which are transmitted via the radio channel. A first step of determining a first transmission signal rate for transmitting a signal addressed to the first mobile station to the storage means, and the first step of determining the first transmission signal rate in the signal storage means with the determined first transmission signal rate. Second for transmitting a signal addressed to a mobile station And a second transmission signal rate for transmitting a signal addressed to the second mobile station to each of the signal storage means, according to the total amount of signals stored in all the signal storage means. A third step, the second step according to the determined second transmission signal rate
A fourth step of transmitting a signal addressed to the mobile station, the step of receiving a signal transmitted at the second transmission signal rate, the ratio of the first transmission signal rate determined for each of the signal storage means. Accordingly, a fifth step of allocating the signal addressed to the second mobile station to each of the signal storage means, and stored in the signal storage means via each of the wireless channels associated with the signal storage means. And a sixth step of transmitting a signal addressed to the first mobile station and a signal addressed to the second mobile station. 4. In the third step, the sum of the first transmission signal rates determined for each of the signal storage means is multiplied by a predetermined weighting factor.
The mobile communication control method according to claim 3, wherein the second transmission signal rate is determined.