JP3856140B2 - Mobile network channel control system, mobile network channel control method and program - Google Patents

Description

  The present invention relates to a mobile network channel control system, a mobile network channel control method using the system, and a program for executing the method.

  Some conventional techniques guarantee the average delay time of a certain period for the delay time of an IP (Internet Protocol) transmission path, but guarantee the delay time for each piece of information. There are almost no transmission lines. When an IP transmission path is used in a W-CDMA (Wideband-Code Division Multiple Access) system, a phenomenon that a delay occurs temporarily in a certain communication path is considered to occur.

  In addition, a connection-specific timing reference (hereinafter referred to as CFN (Connection Frame Number)) common to all nodes included in the connection is established, and the base station timing reference and CFN There is a frame synchronization mechanism that determines the offset between and compensates for differences between timing references using the offset at the base station (see US Pat.

Also, the base station control device sends a transmission delay control frame to the signal processing device when performing transmission delay control with the base station device, and the signal processing device delays according to the content of the transmission delay control frame. By changing the time used as the arrival criterion and completing transmission delay control from the base station controller to the signal processor in a short period of time, it is possible to reduce late arrival discard of user frames, thereby degrading communication quality. There is a transmission delay control device in a mobile communication system for preventing the above (see Patent Document 2).
Special Table 2002-530021 JP 2001-333446 A

  The conventional system is constructed on the basis of an ATM (Asynchronous Transfer Mode), and can guarantee a delay in a frame unit in the transmission path to some extent. For this reason, the radio network controller (hereinafter referred to as RNC) does not strictly control the variation in transmission path delay, and has a structure that allows a certain amount of delay.

  Therefore, when a frame via an IP transmission line with delay variation is processed in the RNC, frame buffering is performed so as to absorb the delay variation, and the conversation cannot be smoothly performed due to the transmission delay, which is uncomfortable for the speaker. Call processing is continued even in the case of giving a call. That is, the user is charged with a service that is unsatisfactory, but the caller continues to be charged.

  An object of the present invention is to provide a mobile network communication path control system capable of guaranteeing the maximum delay time with a simple configuration, a mobile network communication path control method using the system, and a program for executing the method. .

The mobile network communication path control system of the present invention is
An IP-ATM converter is installed between the ATM-based radio network control apparatus and the IP-based radio base station apparatus for connection between the ATM network and the IP network, and the radio mobile terminal has a plurality of radio base stations. A mobile network communication path control system that transmits and receives a frame from a station device, wherein an IP-ATM converter includes a downlink frame transmitted from a core network side to a wireless mobile terminal side and a core from the wireless mobile terminal side By extracting the time information of the upstream frame transmitted to the network side, judging the frame delay by comparing with the preset delay tolerance of the frame and discarding the delayed frame, the upstream frame delay exceeding the communication quality tolerance Means to perform suppression.

The mobile network communication path control system of the present invention is
An IP-ATM converter is installed between the ATM-based radio network control apparatus and the IP-based radio base station apparatus for connection between the ATM network and the IP network, and the radio mobile terminal has a plurality of radio base stations. A mobile network communication path control system that transmits and receives a frame from a station apparatus, wherein an IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, and an uplink CFN extractor Unit, an uplink frame transmission unit, a delay calculation unit, and a delay determination unit, the downlink frame reception unit receives a downlink frame transmitted from the core network side to the radio mobile terminal side from the radio network control device, Means for sending to the downstream CFN extraction unit, and the downstream CFN extraction unit extracts the CFN from the downstream frame that has passed through the downstream CFN extraction unit; And a means for delivering CFN information to the delay calculation section and a means for sending the downlink frame to the downlink frame transmission section. The downlink frame transmission section has means for sending the downlink frame to the radio base station apparatus, and The frame reception unit has means for receiving an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus and sending it to the uplink CFN extraction unit. The CFN is extracted from the upstream frame that has passed through the extraction unit, the CFN information is passed to the delay calculation unit, and the upstream frame is transmitted to the upstream frame transmission unit. The upstream frame transmission unit wirelessly transmits the upstream frame. Means for sending to the network control device, means for discarding the upstream frame when receiving an instruction to discard the upstream frame, and discarding the upstream frame In this case, the delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit and delivers the CFN from the uplink CFN extraction unit. When the delay time is calculated, the delay time is calculated, and all the calculated delay times are transferred to the delay determination unit. When the delay determination unit detects a delay time longer than the predetermined determination time, And means for sending an instruction to discard the upstream frame to the upstream frame transmission unit.

The mobile network communication path control system of the present invention is
An IP-ATM converter is installed between the ATM-based wireless network control device and the IP-based wireless base station device to connect the ATM network to the IP network, and straddles the control range of the wireless network control device. A moving wireless mobile terminal transmits and receives frames from a plurality of radio base station devices, and the plurality of radio base station devices are mobile network communication path control systems under the control of different radio network control devices. The first main wireless network control device is a wireless network control device that controls the first wireless base station device that communicated, and the wireless network control device is used until the call is disconnected. Second wireless network control for controlling a wireless base station device that has means for communicating via the wireless communication device and performs communication at a moving destination during communication The device has means for transmitting and receiving frames to the first radio network controller, and the IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, and an uplink frame receiver. Unit, an uplink CFN extraction unit, an uplink frame transmission unit, a delay calculation unit, and a delay determination unit, and the downlink frame reception unit transmits a downlink frame transmitted from the core network side to the wireless mobile terminal side as a first radio Means for receiving from the network control device and sending to the downlink CFN extraction unit, the downlink CFN extraction unit extracting CFN from the downlink frame that has passed through the downlink CFN extraction unit, and delivering the CFN information to the delay calculation unit And a means for sending the downlink frame to the downlink frame transmitter, and the downlink frame transmitter is a means for sending the downlink frame to the radio base station apparatus. The uplink frame receiving unit has means for receiving an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus, and transmitting the uplink frame to the uplink CFN extraction unit. The unit includes means for extracting the CFN from the uplink frame that has passed through the uplink CFN extraction unit, passing the CFN information to the delay calculation unit, and means for transmitting the uplink frame to the uplink frame transmission unit. Means for sending the upstream frame to the first radio network controller, means for discarding the upstream frame when receiving an instruction to discard the upstream frame, and discarding the upstream frame when the upstream frame is discarded The delay calculating unit stores the CFN of the downstream frame from the downstream CFN extracting unit. When the CFN is delivered from the upstream CFN extraction unit, the CFN has a means for calculating a delay time and delivering all of the calculated delay times to the delay judgment unit. The delay judgment unit has a preset judgment time. And a means for sending an instruction to discard the upstream frame to the upstream frame transmission section when a longer delay time is detected.

The mobile network communication path control system of the present invention is
An IP-ATM converter is installed between the ATM-based first radio network controller, the IP-based radio base station apparatus, and the second radio network controller for connection between the ATM network and the IP network. The wireless mobile terminal that moves across the control range of the wireless network control device transmits and receives frames from a plurality of wireless base station devices, and the plurality of wireless base station devices are under different wireless network control devices. In the mobile network communication path control system, the main first radio network control device among the plurality of radio network control devices is a radio network control device that controls a radio base station device that communicates first, A radio base station having means for communicating through a radio network controller until a call is disconnected, and performing communication at a moving destination during communication The second radio network control device for controlling the device has means for transmitting / receiving frames to / from the first radio network control device, and the IP-ATM converter includes a downlink frame reception unit and downlink CFN extraction Unit, a downlink frame transmission unit, an uplink frame reception unit, an uplink CFN extraction unit, an uplink frame transmission unit, a delay calculation unit, and a delay determination unit, and the downlink frame reception unit from the core network side to the wireless mobile terminal side A means for receiving a transmitted downlink frame from the first radio network controller and sending the downlink frame to a downlink CFN extractor, wherein the downlink CFN extractor extracts the CFN from the downlink frame that has passed through the downlink CFN extractor; A means for passing CFN information to the delay calculation section; and a means for sending a downlink frame to the downlink frame transmission section. The uplink frame receiving unit receives an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station device, and receives an uplink CFN extraction unit. The upstream CFN extraction unit extracts CFN from the upstream frame that has passed through the upstream CFN extraction unit, delivers CFN information to the delay calculation unit, and transmits the upstream frame to the upstream frame transmission unit. Means for transmitting the uplink frame to the first radio network controller, a means for discarding the uplink frame when receiving an instruction to discard the uplink frame, and an uplink frame. A means for notifying the first radio network controller that the upstream frame has been discarded when the discard frame is discarded. A means for storing the CFN of the downstream frame from the extraction unit, calculating a delay time when the CFN is delivered from the upstream CFN extraction unit, and delivering all of the calculated delay times to the delay determination unit; The delay determination unit has means for sending an instruction to discard the upstream frame to the upstream frame transmission unit when a delay time longer than a predetermined determination time is detected.

The mobile network communication path control system of the present invention is
An IP-ATM converter is installed between the IP base radio base station apparatus and the first radio network control apparatus and the ATM base second radio network control apparatus for connection between the ATM network and the IP network. The wireless mobile terminal that moves across the control range of the wireless network control device transmits and receives frames from a plurality of wireless base station devices, and the plurality of wireless base station devices are under different wireless network control devices. In the mobile network communication path control system, the main first radio network control device among the plurality of radio network control devices is a radio network control device that controls a radio base station device that communicates first, A radio base station having means for communicating through a radio network controller until a call is disconnected, and performing communication at a moving destination during communication The second radio network control device for controlling the device has means for transmitting / receiving frames to / from the first radio network control device, and the IP-ATM converter includes a downlink frame reception unit and downlink CFN extraction Unit, a downlink frame transmission unit, an uplink frame reception unit, an uplink CFN extraction unit, an uplink frame transmission unit, a delay calculation unit, and a delay determination unit, and the downlink frame reception unit from the core network side to the wireless mobile terminal side A means for receiving a transmitted downlink frame from the first radio network controller and sending the downlink frame to a downlink CFN extractor, wherein the downlink CFN extractor extracts the CFN from the downlink frame that has passed through the downlink CFN extractor; A means for passing CFN information to the delay calculation section; and a means for sending a downlink frame to the downlink frame transmission section. The uplink frame receiving unit receives an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station device, and receives an uplink CFN extraction unit. The upstream CFN extraction unit extracts CFN from the upstream frame that has passed through the upstream CFN extraction unit, delivers CFN information to the delay calculation unit, and transmits the upstream frame to the upstream frame transmission unit. Means for transmitting the uplink frame to the first radio network controller, a means for discarding the uplink frame when receiving an instruction to discard the uplink frame, and an uplink frame. A means for notifying the first radio network controller that the upstream frame has been discarded when the discard frame is discarded. A means for storing the CFN of the downstream frame from the extraction unit, calculating a delay time when the CFN is delivered from the upstream CFN extraction unit, and delivering all of the calculated delay times to the delay determination unit; The delay determination unit has means for sending an instruction to discard the upstream frame to the upstream frame transmission unit when a delay time longer than a predetermined determination time is detected.

The IP-ATM converter of the present invention is
An IP-ATM converter used in the mobile network communication path control system described above, wherein the IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, and an uplink CFN extractor. And an uplink frame transmission unit, a delay calculation unit, and a delay determination unit. The downlink frame reception unit receives a downlink frame transmitted from the core network side to the radio mobile terminal side from the radio network control device, and transmits a downlink frame. Means for sending to the CFN extraction unit, the downlink CFN extraction unit extracting CFN from the downlink frame that has passed through the downlink CFN extraction unit, and delivering the CFN information to the delay calculation unit; and the downlink frame transmission unit And the downlink frame transmission unit has means for transmitting the downlink frame to the radio base station apparatus, and The frame reception unit has means for receiving an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus and sending it to the uplink CFN extraction unit. Means for extracting the CFN from the upstream frame that has passed through the CFN extraction unit, passing the CFN information to the delay calculation unit, and means for transmitting the upstream frame to the upstream frame transmission unit; Means for sending to the wireless network control device, and means for discarding the upstream frame when receiving an instruction for discarding the upstream frame, and when the upstream frame is discarded, tells the wireless network control device that the upstream frame has been discarded. The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, and stores the CFN from the uplink CFN extraction unit. If it is delivered, it has a means to calculate the delay time and deliver all the calculated delay time to the delay judgment unit, and the delay judgment unit detects a delay time longer than the preset judgment time In this case, there is provided means for sending an instruction to discard the upstream frame to the upstream frame transmission unit.

  An IP-ATM converter for use in the mobile network communication path control system described above, wherein the IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, and an uplink CFN. An extraction unit, an uplink frame transmission unit, a delay calculation unit, and a delay determination unit, and the downlink frame reception unit transmits a downlink frame transmitted from the core network side to the radio mobile terminal side from the first radio network control device Means for receiving and sending to the downstream CFN extracting section, the downstream CFN extracting section extracting CFN from the downstream frame that has passed through the downstream CFN extracting section, and delivering the CFN information to the delay computing section; Means for sending the downlink frame to the downlink frame transmission unit, and the downlink frame transmission unit has means for sending the downlink frame to the radio base station apparatus. The uplink frame receiving unit has a means for receiving an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus, and sending the uplink frame to the uplink CFN extraction unit. The CFN is extracted from the upstream frame that has passed through the upstream CFN extracting unit, the CFN information is passed to the delay calculating unit, and the upstream frame is transmitted to the upstream frame transmitting unit. Means for sending the frame to the first radio network controller, means for discarding the upstream frame when receiving an instruction to discard the upstream frame, and indicating that the upstream frame is discarded when the upstream frame is discarded. The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, When the CFN is delivered from the CFN extraction unit, the CFN has a means for calculating a delay time and delivering all the calculated delay times to the delay judgment unit. In the case where a long delay time is detected, there may be provided means for sending an instruction to discard the upstream frame to the upstream frame transmission unit.

A mobile network channel control method using the mobile network channel control system of the present invention,
An IP-ATM converter is installed between the ATM-based radio network control apparatus and the IP-based radio base station apparatus for connection between the ATM network and the IP network, and the radio mobile terminal has a plurality of radio base stations. A mobile network communication path control method using a mobile network communication path control system that transmits and receives a frame from a station apparatus, wherein an IP-ATM converter is transmitted from a core network side to a wireless mobile terminal side. By extracting time information of the frame and the uplink frame transmitted from the wireless mobile terminal side to the core network side, judging the frame delay by comparing with the preset frame delay allowance, and discarding the delay frame Then, uplink frame delay suppression exceeding the communication quality tolerance is performed.

A mobile network channel control method using the mobile network channel control system of the present invention,
An IP-ATM converter is installed between the ATM-based radio network control apparatus and the IP-based radio base station apparatus for connection between the ATM network and the IP network, and the radio mobile terminal has a plurality of radio base stations. A mobile network communication path control method using a mobile network communication path control system that transmits and receives a frame from a station apparatus, wherein an IP-ATM converter includes a downlink frame reception unit, a downlink CFN extraction unit, and a downlink frame transmission unit An uplink frame receiving unit, an uplink CFN extracting unit, an uplink frame transmitting unit, a delay calculating unit, and a delay determining unit, and the downlink frame receiving unit transmits a downlink frame transmitted from the core network side to the wireless mobile terminal side. Received from the radio network controller and sent to the downlink CFN extractor, and the downlink CFN extractor downloads the downlink that has passed through the downlink CFN extractor. The CFN is extracted from the frame, the CFN information is transferred to the delay calculation unit, the downlink frame is transmitted to the downlink frame transmission unit, the downlink frame transmission unit transmits the downlink frame to the radio base station apparatus, and the uplink frame reception unit is An uplink frame transmitted from the mobile terminal side to the core network side is received from the radio base station apparatus and transmitted to the uplink CFN extraction unit. The uplink CFN extraction unit obtains the CFN from the uplink frame that has passed through the uplink CFN extraction unit. Extract, pass CFN information to delay calculation unit, send uplink frame to uplink frame transmission unit, delay calculation unit saves CFN of downlink frame from downlink CFN extraction unit, and delivers CFN from uplink CFN extraction unit If so, the delay time is calculated, and all the calculated delay times are transferred to the delay determination unit. The delay determination unit is set in advance. When a delay time longer than the determination time is detected, an uplink frame discard instruction command is sent to the uplink frame transmission unit, and the uplink frame transmission unit does not receive an uplink frame discard instruction command from the delay determination unit, When the frame is transmitted to the radio network controller and an instruction for discarding the upstream frame is received from the delay determination unit, the upstream frame discard process is performed, and the fact that the discard process has been performed is transmitted to the radio network controller.

A mobile network channel control method using the mobile network channel control system of the present invention,
An IP-ATM converter is installed between the ATM-based wireless network control device and the IP-based wireless base station device to connect the ATM network to the IP network, and straddles the control range of the wireless network control device. A mobile wireless mobile terminal transmits and receives frames from a plurality of radio base station apparatuses, and the plurality of radio base station apparatuses are under the control of different radio network control apparatuses, and a mobile network using a mobile network communication path control system A communication path control method, wherein a first primary radio network controller among a plurality of radio network controllers is a radio network controller that controls a radio base station apparatus that has communicated first, Communication is performed via the wireless network control device until it is disconnected, and the wireless base station device that performs communication at the destination during communication is controlled. The second radio network control device behaves so as to transmit / receive a frame to / from the first radio network control device, and the IP-ATM converter includes a downlink frame reception unit, a downlink CFN extraction unit, a downlink frame transmission unit, An uplink frame reception unit, an uplink CFN extraction unit, an uplink frame transmission unit, a delay calculation unit, and a delay determination unit, and the downlink frame reception unit transmits a downlink frame transmitted from the core network side to the wireless mobile terminal side. 1 is received from the radio network control apparatus and transmitted to the downlink CFN extraction unit. The downlink CFN extraction unit extracts the CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes the CFN information to the delay calculation unit, and transmits the downlink frame. Is transmitted to the downlink frame transmission unit, and the downlink frame transmission unit transmits the downlink frame to the radio base station apparatus, and the uplink frame The reception unit receives the uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus, and sends the uplink frame to the uplink CFN extraction unit. The uplink CFN extraction unit passes through the uplink CFN extraction unit The CFN is extracted from the uplink frame, the CFN information is transferred to the delay calculation unit, the uplink frame is transmitted to the uplink frame transmission unit, the delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, and the uplink CFN extraction unit When the CFN is delivered, the delay time is calculated, and all the calculated delay times are delivered to the delay judgment unit. When the delay judgment unit detects a delay time longer than the preset judgment time, When an uplink frame discard command is sent to the uplink frame transmitter, and the uplink frame transmitter does not receive an uplink frame discard command from the delay determiner When the upstream frame is transmitted to the first wireless network control device and an instruction for discarding the upstream frame is received from the delay determination unit, the upstream wireless frame control is performed by performing upstream frame discarding processing. Send to device.

A mobile network channel control method using the mobile network channel control system of the present invention,
An IP-ATM converter is installed between the ATM-based first radio network controller, the IP-based radio base station apparatus, and the second radio network controller for connection between the ATM network and the IP network. The wireless mobile terminal that moves across the control range of the wireless network control device transmits and receives frames from a plurality of wireless base station devices, and the plurality of wireless base station devices are under different wireless network control devices. A mobile network communication path control method using a mobile network communication path control system, wherein a main first radio network control apparatus among a plurality of radio network control apparatuses is a radio base station apparatus that communicates first. A wireless network control device that controls, communicates through the wireless network control device until the call is disconnected, The second radio network controller that controls the radio base station apparatus that performs communication at the middle destination moves to transmit / receive a frame to / from the first radio network controller, and the IP-ATM converter A reception unit, a downlink CFN extraction unit, a downlink frame transmission unit, an uplink frame reception unit, an uplink CFN extraction unit, an uplink frame transmission unit, a delay calculation unit, and a delay determination unit; The downlink frame transmitted to the wireless mobile terminal side is received from the first radio network controller and sent to the downlink CFN extraction unit. The downlink CFN extraction unit obtains the CFN from the downlink frame that has passed through the downlink CFN extraction unit. Extract, pass CFN information to delay calculation unit, send downlink frame to downlink frame transmission unit, and downlink frame transmission unit The uplink frame receiving unit receives the uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station device, and transmits the uplink frame to the uplink CFN extracting unit. The extraction unit extracts the CFN from the uplink frame that has passed through the uplink CFN extraction unit, passes the CFN information to the delay calculation unit, sends the uplink frame to the uplink frame transmission unit, and the delay calculation unit transmits the downlink frame from the downlink CFN extraction unit. When the CFN of the frame is stored and the CFN is delivered from the upstream CFN extraction unit, the delay time is calculated, and all the calculated delay times are delivered to the delay judgment unit. When a delay time longer than the time is detected, an uplink frame discard instruction command is sent to the uplink frame transmission unit, and the uplink frame transmission unit If no frame discard instruction command is received, the uplink frame is transmitted to the first radio network controller, and if an uplink frame discard instruction command is received from the delay determination unit, the uplink frame discard process is performed, and the discard process is performed. The execution is transmitted to the first radio network controller.

A mobile network channel control method using the mobile network channel control system of the present invention,
An IP-ATM converter is installed between the IP base radio base station apparatus and the first radio network control apparatus and the ATM base second radio network control apparatus for connection between the ATM network and the IP network. The wireless mobile terminal that moves across the control range of the wireless network control device transmits and receives frames from a plurality of wireless base station devices, and the plurality of wireless base station devices are under different wireless network control devices. A mobile network communication path control method using a mobile network communication path control system, wherein a main first radio network control apparatus among a plurality of radio network control apparatuses is a radio base station apparatus that communicates first. A wireless network control device that controls, communicates through the wireless network control device until the call is disconnected, The second radio network controller that controls the radio base station apparatus that performs communication at the middle destination moves to transmit / receive a frame to / from the first radio network controller, and the IP-ATM converter A reception unit, a downlink CFN extraction unit, a downlink frame transmission unit, an uplink frame reception unit, an uplink CFN extraction unit, an uplink frame transmission unit, a delay calculation unit, and a delay determination unit; The downlink frame transmitted to the wireless mobile terminal side is received from the first radio network controller and sent to the downlink CFN extraction unit. The downlink CFN extraction unit obtains the CFN from the downlink frame that has passed through the downlink CFN extraction unit. Extract, pass CFN information to delay calculation unit, send downlink frame to downlink frame transmission unit, and downlink frame transmission unit The uplink frame receiving unit receives the uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station device, and transmits the uplink frame to the uplink CFN extracting unit. The extraction unit extracts the CFN from the uplink frame that has passed through the uplink CFN extraction unit, passes the CFN information to the delay calculation unit, sends the uplink frame to the uplink frame transmission unit, and the delay calculation unit transmits the downlink frame from the downlink CFN extraction unit. When the CFN of the frame is stored and the CFN is delivered from the upstream CFN extraction unit, the delay time is calculated, and all the calculated delay times are delivered to the delay judgment unit. When a delay time longer than the time is detected, an uplink frame discard instruction command is sent to the uplink frame transmission unit, and the uplink frame transmission unit If no frame discard instruction command is received, the uplink frame is transmitted to the first radio network controller, and if an uplink frame discard instruction command is received from the delay determination unit, the uplink frame discard process is performed, and the discard process is performed. The execution is transmitted to the first radio network controller.

The program of the present invention
A computer or a microprocessor is caused to execute a mobile network communication path control method using the above-described mobile network communication path control system.

  The present invention has the following effects.

In the present invention, in the IP-ATM converter, by setting the frame delay tolerance, extracting the frame time information, determining the frame delay and discarding the delay frame,
-Suppressing the uplink frame delay that exceeds the communication quality tolerance-Discarding frames with a long delay time has the effect of preventing an increase in call delay. In general, the delay time at which a telephone conversation is uncomfortable is said to be approximately 200 [ms], and it becomes difficult to perform conversation when a delay of more than that occurs.

  Further, there is an effect that the maximum delay time can be guaranteed without modifying the existing wireless network control device. That is, the maximum delay time can be guaranteed with a simple configuration, and a high quality service can be provided.

(First Embodiment of the Invention)
A configuration example of a mobile network according to the first embodiment of this invention is shown in FIG.

  In FIG. 1, an IP network is connected to an ATM network between an ATM-based radio network controller (hereinafter referred to as RNC) 1 and IP-based radio base station devices (hereinafter referred to as BTS) 3A and 3B. -An ATM converter (hereinafter referred to as I / A) 2 is installed. A wireless mobile terminal (hereinafter referred to as MS) 4 transmits and receives frames from a plurality of BTSs.

  Examples of mobile networks in the case of performing communication across a plurality of RNCs are shown in FIGS.

  The present invention is characterized in that in a W-CDMA system, call quality is ensured by discarding data delayed more than specified by I / A.

  Most IP transmission paths do not guarantee information transfer time individually. When real-time information is transmitted using an IP transmission path, a large delay may occur. For data downloads that do not strictly require real time, the delay has little effect on the user. However, a communication delay in a voice call or the like causes discomfort to the speaker, and the delay deteriorates the service quality.

  In this system, communication delay frame discard control is performed in the I / A, and service quality can be improved without modifying the RNC.

  In FIG. 1, a radio network controller RNC1 of the system has an I / A2 under the control of ATM network-IP network conversion. Furthermore, BTS 3A and 3B exist before I / A2.

  The I / A 2 extracts time information of the downstream frame from the RNC to the BTS and the upstream frame from the BTS to the RNC, determines the frame delay by comparing with a preset frame delay allowance, and discards the delayed frame. By doing so, uplink frame delay suppression exceeding the allowable communication quality is performed.

  The configuration of the delay detection mechanism unit 21 in the I / A 2 is shown in FIG.

  The upstream frame is a frame transmitted from the MS side to the core network side, and the downstream frame is a frame transmitted from the core network side to the MS side.

  In the I / A, CFN extraction units 11 and 16 that perform CFN extraction are installed on the upstream side and the downstream side, and the delay time is calculated by taking the difference between the extracted CFNs. It is determined whether to discard the frame from the delay time. The CFN is time information for controlling the timing by the BTS so that the frames arrive at the MS at the same time, and is a time counter that is incremented by 1 every 10 [ms]. This CFN is unique time information that exists for each service line in the RNC, I / A, BTS, and MS.

  If all the bits for CFN become 1 and 10 [ms] have elapsed, CFN is reset to 0. For example, when CFN is 8 bits, the value after 10 [ms] of 0xFF is 0x00.

  The downlink CFN extraction unit 11 and the uplink CFN extraction unit 16 extract the CFN from the frames that have passed through the downlink CFN extraction unit 11 and the uplink CFN extraction unit 16, respectively, and pass the CFN information to the delay calculation unit 14.

  The delay calculation unit 14 stores the CFN of the downlink frame from the downlink CFN extraction unit 11, and calculates the delay time when the CFN is delivered from the uplink CFN extraction unit 16. All the calculated delay times are transferred to the delay determination unit 13.

  When the delay determination unit 13 detects a delay time longer than a predetermined determination time, the delay determination unit 13 sends an uplink frame discard instruction command to the uplink frame transmission unit 15.

  The upstream frame transmission unit 15 is provided with a frame standby buffer for waiting for delay time calculation and determination processing.

  The operation of this system in FIG. 1 will be described.

An example of the operation of this system is shown in FIG. An example of processing at the time of starting the apparatus is as follows.
1. CFN is incremented by one in the RNC so as to match the BTS. CFN is added to the frame and sent to the I / A.
2. CFN is extracted from the downstream frames that sequentially enter the I / A, and is sent to the delay calculation unit. A plurality of downlink CFNs cannot be stored in the delay calculation unit, and when a new downlink CFN arrives even though the downlink CFN is held in the delay calculation unit, the old downlink CFN is discarded and newly arrived Hold CFN.
3. Similarly, in the upstream frame, CFNs of all frames received from the BTS side are extracted and transferred to the delay calculation unit. At this time, if the downlink CFN is not held in the delay calculation unit, the delay determination unit is instructed to transmit the uplink frame to the RNC without calculating the delay time, and the process is terminated. To do. Only when the downstream CFN is held, the process proceeds to the next procedure.
4). When a pair of downstream CFN and upstream CFN are arranged in the delay calculation unit, the delay time is calculated from the two CFNs. The formula for calculating the delay time is as follows.

(Delay time) = ((Downstream CFN) − (Upstream CFN)) × 10 [ms]
Since the upstream frame is a return signal from the MS, there is little possibility that (downstream CFN) <(upstream CFN). However, this is not the case when CFN = 0 is sandwiched between the downstream CFN and the upstream CFN, and the calculation is performed after adding the previous numerical value of 0 (0xFF when CFN is 8 bits) to the downstream CFN. By doing so, the correct calculation result can be obtained. The calculated delay time is transferred to the delay determination unit.

In FIG. 6, when CFN is 8 bits, downstream CFN = X and upstream CFN = X−y are stored in the delay calculation unit, and therefore the delay time is 10 y [ms] from the calculation formula. If y ≧ 0, 10y [ms] is sufficient. If y <0 (when CFN = 00 is sandwiched between downstream CFN and upstream CFN), 10 (y + 0xFF) [ms] is the delay time.
5). If the delay time passed to the delay determination unit is greater than a predetermined determination time value, the uplink frame transmission unit issues an instruction to perform uplink frame discard processing for the line.
For example, when y = 30 and determination time = 200 [ms], the delay time is 300 [ms], which exceeds the determination time. Therefore, a command to discard the upstream frame is transmitted to the system.
6). When an upstream frame discard command is received, the upstream frame transmission unit performs upstream frame discard processing, and informs the RNC that the upstream frame discard processing has been performed.

  In operations 2 and 3, the upstream CFN may be held first and the downstream CFN may be waited. However, the processing time is shorter when the downstream CFN is held first and the upstream CFN is waited.

(Second Embodiment of the Invention)
A second embodiment of the invention in FIG. 2 will be described.

  The network configuration in FIG. 2 is that the BTSs 3B and 3C communicating with the MS moving across the control range of the RNC are under different RNCs, and the RNC is ATM-based and the BTS is IP-based Shows the case.

The main RNC when communicating across RNCs is the RNC that controls the BTS that communicated first, and communicates through this RNC until the call is disconnected. This RNC is called Serving RNC (SRNC). Also, the RNC that controls the BTS that performs communication at the moving destination during communication is referred to as a Drift RNC (DRNC), which behaves so as to transmit / receive a frame to / from the SRNC.
1. CFN is incremented by one in the SRNC so as to match the BTS. CFN is added to the frame and sent out to both I / A sides.
2. CFN is extracted from the downstream frames that sequentially enter the I / A, and is sent to the delay calculation unit. A plurality of downlink CFNs cannot be stored in the delay calculation unit, and when a new downlink CFN arrives even though the downlink CFN is held in the delay calculation unit, the old downlink CFN is discarded and newly arrived Hold CFN.
3. Similarly, in the upstream frame, CFNs of all frames received from the BTS side are extracted and transferred to the delay calculation unit. At this time, if the downlink CFN is not held in the delay calculation unit, the delay determination unit is instructed to transmit the uplink frame to the DRNC without calculating the delay time, and the process is terminated. To do. Only when the downstream CFN is held, the process proceeds to the next procedure.
4). When a pair of downstream CFN and upstream CFN are arranged in the delay calculation unit, the delay time is calculated from the two CFNs. The calculation formula is the same as that of the operation of the second embodiment of the invention.
5). If the delay time passed to the delay determination unit is greater than a predetermined determination time value, the uplink frame transmission unit issues an instruction to perform uplink frame discard processing for the line.
6). When an upstream frame discard command is received, the upstream frame transmission unit performs the upstream frame discard process, and notifies the DRNC that the upstream frame discard process has been performed.

  As described above, the operation procedure is the same as the description of the operation of the second embodiment of the invention. This is because there is a delay guarantee in the ATM network, and a long delay occurs in the IP network closer to the terminal than I / A. Therefore, when communication is performed between a plurality of RNCs, a delay is calculated at the I / A and a frame discard report is simply sent to the SRNC via the DRNC.

(Third embodiment of the invention)
A third embodiment of the invention in FIG. 3 will be described.

  SRNC is an ATM base and DRNC and BTS are IP bases, and communication is performed across multiple RNCs. The movement of the MS is the same as in FIG.

Since SRNC and DRNC cannot directly communicate with each other, it is necessary to convert them in I / A.
1. CFN is incremented by one in the SRNC so as to match the BTS. CFN is added to the frame and sent out to both I / A sides.
2. CFN is extracted from the downstream frames that sequentially enter the I / A, and is sent to the delay calculation unit. A plurality of downlink CFNs cannot be stored in the delay calculation unit, and when a new downlink CFN arrives even though the downlink CFN is held in the delay calculation unit, the old downlink CFN is discarded and newly arrived Hold CFN.
3. Similarly, in the upstream frame, CFNs of all frames received from the BTS side are extracted and transferred to the delay calculation unit. At this time, if the downlink CFN is not held in the delay calculation unit, the delay determination unit is instructed to transmit the uplink frame to the DRNC without calculating the delay time, and the process is terminated. To do. Only when the downstream CFN is held, the process proceeds to the next procedure.
4). When a pair of downstream CFN and upstream CFN are arranged in the delay calculation unit, the delay time is calculated from the two CFNs. The calculation formula is the same as in the description of the first embodiment of the invention.
5). If the delay time passed to the delay determination unit is larger than a predetermined determination time value, the SRNC issues an instruction to perform upstream frame discard processing for that line.
6). When an upstream frame discard command is received, the upstream frame transmission unit performs the upstream frame discard process, and notifies the DRNC that the upstream frame discard process has been performed.

(Fourth embodiment of the invention)
A fourth embodiment of the invention shown in FIG. 4 will be described.

When SRNC and BTS are configured on an IP basis and DRNC is configured on an ATM basis, communication is performed across a plurality of RNCs, and an I / A is installed between the RNCs. The movement of the MS is the same as in FIG.
1. CFN is incremented by one in the SRNC so as to match the BTS. CFN is added to the frame and sent out to both I / A sides.
2. CFN is extracted from the downstream frames that sequentially enter the I / A, and is sent to the delay calculation unit. A plurality of downlink CFNs cannot be stored in the delay calculation unit, and when a new downlink CFN arrives even though the downlink CFN is held in the delay calculation unit, the old downlink CFN is discarded and newly arrived Hold CFN.
3. Similarly, in the upstream frame, CFNs of all frames received from the BTS side are extracted and transferred to the delay calculation unit. At this time, if the downlink CFN is not held in the delay calculation unit, the delay determination unit is instructed to transmit the uplink frame to the DRNC without calculating the delay time, and the process is terminated. To do. Only when the downstream CFN is held, the process proceeds to the next procedure.
4). When a pair of downstream CFN and upstream CFN are arranged in the delay calculation unit, the delay time is calculated from the two CFNs. The calculation formula is the same as in the description of the first embodiment of the invention.
5). If the delay time passed to the delay determination unit is larger than a predetermined determination time value, the SRNC issues an instruction to perform upstream frame discard processing for that line.
6). When an upstream frame discard command is received, the upstream frame transmission unit performs the upstream frame discard process, and notifies the DRNC that the upstream frame discard process has been performed.

  The transmission frame on the DRNC side undergoes IP-ATM conversion at two locations, I / A 2A and 2B. In this case, the delay calculation may be performed with both I / As, but it is more efficient to detect the delay time only with the I / A between the RNCs.

  Further, the mobile network communication path control method can be executed by a computer or a microprocessor by the program of the mobile network communication path control method using the mobile network communication path control system according to the above-described embodiment of the present invention.

It is a figure which shows the structural example of the mobile network of the 1st Embodiment of this invention. It is a figure which shows the structural example of the mobile network of the 2nd Embodiment of this invention. It is a figure which shows the structural example of the mobile network of the 3rd Embodiment of this invention. It is a figure which shows the structural example of the mobile network of the 4th Embodiment of this invention. It is a figure which shows the structure of the delay detection mechanism part in I / A. It is a figure which shows the operation example of this system.

Explanation of symbols

1, 1A, 1B Radio Network Controller (RNC)
2, 2A, 2B IP-ATM converter (I / A)
3, 3A, 3B, 3C, 3D Wireless base station equipment (BTS)
4 Wireless mobile terminals (MS)
DESCRIPTION OF SYMBOLS 10 Downstream frame reception part 11 Downstream CFN extraction part 12 Downstream frame transmission part 13 Delay determination part 14 Delay calculation part 15 Upstream frame transmission part 16 Upstream CFN extraction part 17 Upstream frame reception part 21 Delay detection mechanism part

Claims (13)

An IP-ATM converter is installed between the ATM-based wireless network control device and the IP-based wireless base station device for connection between the ATM network and the IP network. A mobile network communication path control system that transmits and receives frames from a base station device,
The IP-ATM converter extracts time information of a downstream frame transmitted from the core network side to the wireless mobile terminal side and an upstream frame transmitted from the wireless mobile terminal side to the core network side, A mobile network communication path control system comprising means for suppressing an upstream frame delay that exceeds a communication quality tolerance by determining a frame delay by comparing with a set frame delay allowable amount and discarding the delayed frame. An IP-ATM converter is installed between the ATM-based wireless network control device and the IP-based wireless base station device for connection between the ATM network and the IP network. A mobile network communication path control system that transmits and receives frames from a base station device,
The IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, an uplink CFN extractor, an uplink frame transmitter, a delay calculator, and a delay determiner.
The downlink frame receiving unit has means for receiving a downlink frame transmitted from the core network side to the radio mobile terminal side from the radio network control device and sending it to the downlink CFN extracting unit,
The downlink CFN extraction unit extracts CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the downlink frame to the downlink frame transmission unit. Have
The downlink frame transmission unit includes means for transmitting the downlink frame to the radio base station device,
The uplink frame receiving unit has means for receiving an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus and sending the uplink frame to the uplink CFN extraction unit,
The uplink CFN extracting unit extracts CFN from an uplink frame that has passed through the uplink CFN extracting unit, delivers CFN information to the delay calculation unit, and sends out the uplink frame to the uplink frame transmitting unit. Have
The uplink frame transmission unit includes means for sending the uplink frame to the radio network controller, means for discarding the uplink frame when receiving an instruction to discard the uplink frame, and uplink frame when the uplink frame is discarded. Means for informing the wireless network control device that the device has been discarded,
The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, calculates the delay time when the CFN is delivered from the uplink CFN extraction unit, and calculates all the calculated delay times as the delay Having a means for passing to the determination unit;
The mobile network communication path control system, wherein the delay determination unit includes means for transmitting an uplink frame discard instruction command to the uplink frame transmission unit when a delay time longer than a preset determination time is detected. An IP-ATM converter is installed between the ATM-based wireless network control device and the IP-based wireless base station device for connection between the ATM network and the IP network, and straddles the control range of the wireless network control device. A mobile network communication path control system in which a wireless mobile terminal moving in the network transmits and receives frames from a plurality of the radio base station devices, and the plurality of radio base station devices are subordinate to the different radio network control devices Because
Of the plurality of wireless network control devices, the first primary wireless network control device is a wireless network control device that controls the wireless base station device that communicated first, and the wireless network control device until the call is disconnected. A second radio network controller having a means for performing communication via the controller and controlling a radio base station apparatus that performs communication at a destination during communication transmits a frame to the first radio network controller. Has a way to act to send and receive
The IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, an uplink CFN extractor, an uplink frame transmitter, a delay calculator, and a delay determiner.
The downlink frame receiving unit has means for receiving a downlink frame transmitted from the core network side to the wireless mobile terminal side from the first radio network control device and sending the downlink frame to the downlink CFN extracting unit,
The downlink CFN extraction unit extracts CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the downlink frame to the downlink frame transmission unit. Have
The downlink frame transmission unit includes means for transmitting the downlink frame to the radio base station device,
The uplink frame receiving unit has means for receiving an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus and sending the uplink frame to the uplink CFN extraction unit,
The uplink CFN extracting unit extracts CFN from an uplink frame that has passed through the uplink CFN extracting unit, delivers CFN information to the delay calculation unit, and sends out the uplink frame to the uplink frame transmitting unit. Have
The uplink frame transmitting unit includes means for sending the uplink frame to the first radio network controller, means for discarding the uplink frame when receiving an instruction to discard the uplink frame, and discarding the uplink frame Means for informing the first radio network controller that the upstream frame has been discarded.
The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, calculates the delay time when the CFN is delivered from the uplink CFN extraction unit, and calculates all the calculated delay times as the delay Having a means for passing to the determination unit;
The mobile network communication path control system, wherein the delay determination unit includes means for transmitting an uplink frame discard instruction command to the uplink frame transmission unit when a delay time longer than a preset determination time is detected. An IP-ATM converter is installed between the ATM-based first radio network controller, the IP-based radio base station apparatus, and the second radio network controller for connection between the ATM network and the IP network. The wireless mobile terminal that moves across the control range of the wireless network control device transmits and receives frames from the plurality of wireless base station devices, and the plurality of wireless base station devices are different from each other. Is a mobile network communication path control system under the control of
Of the plurality of wireless network control devices, the first primary wireless network control device is a wireless network control device that controls the wireless base station device that communicated first, and the wireless network control device until the call is disconnected. A second radio network controller having a means for performing communication via the controller and controlling a radio base station apparatus that performs communication at a destination during communication transmits a frame to the first radio network controller. Has a way to act to send and receive
The IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, an uplink CFN extractor, an uplink frame transmitter, a delay calculator, and a delay determiner.
The downlink frame receiving unit has means for receiving a downlink frame transmitted from the core network side to the wireless mobile terminal side from the first radio network control device and sending the downlink frame to the downlink CFN extracting unit,
The downlink CFN extraction unit extracts CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the downlink frame to the downlink frame transmission unit. Have
The downlink frame transmission unit includes means for transmitting the downlink frame to the radio base station device,
The uplink frame receiving unit has means for receiving an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus and sending the uplink frame to the uplink CFN extraction unit,
The uplink CFN extracting unit extracts CFN from an uplink frame that has passed through the uplink CFN extracting unit, delivers CFN information to the delay calculation unit, and sends out the uplink frame to the uplink frame transmitting unit. Have
The uplink frame transmitting unit includes means for sending the uplink frame to the first radio network controller, means for discarding the uplink frame when receiving an instruction to discard the uplink frame, and discarding the uplink frame Means for informing the first radio network controller that the upstream frame has been discarded.
The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, calculates the delay time when the CFN is delivered from the uplink CFN extraction unit, and calculates all the calculated delay times as the delay Having a means for passing to the determination unit;
The mobile network communication path control system, wherein the delay determination unit includes means for transmitting an uplink frame discard instruction command to the uplink frame transmission unit when a delay time longer than a preset determination time is detected. An IP-ATM converter is installed between the IP base radio base station apparatus and the first radio network control apparatus and the ATM base second radio network control apparatus for connection between the ATM network and the IP network. The wireless mobile terminal that moves across the control range of the wireless network control device transmits and receives frames from the plurality of wireless base station devices, and the plurality of wireless base station devices are different from each other. Is a mobile network communication path control system under the control of
Of the plurality of wireless network control devices, the first primary wireless network control device is a wireless network control device that controls the wireless base station device that communicated first, and the wireless network control device until the call is disconnected. A second radio network controller having a means for performing communication via the controller and controlling a radio base station apparatus that performs communication at a destination during communication transmits a frame to the first radio network controller. Has a way to act to send and receive
The IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, an uplink CFN extractor, an uplink frame transmitter, a delay calculator, and a delay determiner.
The downlink frame receiving unit has means for receiving a downlink frame transmitted from the core network side to the wireless mobile terminal side from the first radio network control device and sending the downlink frame to the downlink CFN extracting unit,
The downlink CFN extraction unit extracts CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the downlink frame to the downlink frame transmission unit. Have
The downlink frame transmission unit includes means for transmitting the downlink frame to the radio base station device,
The uplink frame receiving unit has means for receiving an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus and sending the uplink frame to the uplink CFN extraction unit,
The uplink CFN extracting unit extracts CFN from an uplink frame that has passed through the uplink CFN extracting unit, delivers CFN information to the delay calculation unit, and sends out the uplink frame to the uplink frame transmitting unit. Have
The uplink frame transmitting unit includes means for sending the uplink frame to the first radio network controller, means for discarding the uplink frame when receiving an instruction to discard the uplink frame, and discarding the uplink frame Means for informing the first radio network controller that the upstream frame has been discarded.
The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, calculates the delay time when the CFN is delivered from the uplink CFN extraction unit, and calculates all the calculated delay times as the delay Having a means for passing to the determination unit;
The mobile network communication path control system, wherein the delay determination unit includes means for transmitting an uplink frame discard instruction command to the uplink frame transmission unit when a delay time longer than a preset determination time is detected. An IP-ATM converter for use in the mobile network communication path control system according to claim 2,
The IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, an uplink CFN extractor, an uplink frame transmitter, a delay calculator, and a delay determiner.
The downlink frame receiving unit has means for receiving a downlink frame transmitted from the core network side to the radio mobile terminal side from the radio network control device and sending it to the downlink CFN extracting unit,
The downlink CFN extraction unit extracts CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the downlink frame to the downlink frame transmission unit. Have
The downlink frame transmission unit includes means for transmitting the downlink frame to the radio base station device,
The uplink frame receiving unit has means for receiving an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus and sending the uplink frame to the uplink CFN extraction unit,
The uplink CFN extracting unit extracts CFN from an uplink frame that has passed through the uplink CFN extracting unit, delivers CFN information to the delay calculation unit, and sends out the uplink frame to the uplink frame transmitting unit. Have
The uplink frame transmission unit includes means for sending the uplink frame to the radio network controller, means for discarding the uplink frame when receiving an instruction to discard the uplink frame, and uplink frame when the uplink frame is discarded. Means for informing the wireless network control device that the device has been discarded,
The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, calculates the delay time when the CFN is delivered from the uplink CFN extraction unit, and calculates all the calculated delay times as the delay Having a means for passing to the determination unit;
The IP-ATM converter, wherein the delay determination unit includes means for sending an instruction to discard an upstream frame to the upstream frame transmission unit when a delay time longer than a predetermined determination time is detected. An IP-ATM converter for use in the mobile network communication path control system according to any one of claims 3 to 5,
The IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, an uplink CFN extractor, an uplink frame transmitter, a delay calculator, and a delay determiner.
The downlink frame receiving unit has means for receiving a downlink frame transmitted from the core network side to the wireless mobile terminal side from the first radio network control device and sending the downlink frame to the downlink CFN extracting unit,
The downlink CFN extraction unit extracts CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the downlink frame to the downlink frame transmission unit. Have
The downlink frame transmission unit includes means for transmitting the downlink frame to the radio base station device,
The uplink frame receiving unit has means for receiving an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station apparatus and sending the uplink frame to the uplink CFN extraction unit,
The uplink CFN extracting unit extracts CFN from an uplink frame that has passed through the uplink CFN extracting unit, delivers CFN information to the delay calculation unit, and sends out the uplink frame to the uplink frame transmitting unit. Have
The uplink frame transmitting unit includes means for sending the uplink frame to the first radio network controller, means for discarding the uplink frame when receiving an instruction to discard the uplink frame, and discarding the uplink frame Means for informing the first radio network controller that the upstream frame has been discarded.
The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, calculates the delay time when the CFN is delivered from the uplink CFN extraction unit, and calculates all the calculated delay times as the delay Having a means for passing to the determination unit;
The IP-ATM converter, wherein the delay determination unit includes means for sending an instruction to discard an upstream frame to the upstream frame transmission unit when a delay time longer than a predetermined determination time is detected. An IP-ATM converter is installed between the ATM-based wireless network control device and the IP-based wireless base station device for connection between the ATM network and the IP network. A mobile network channel control method using a mobile network channel control system that transmits and receives frames from a base station device,
The IP-ATM converter extracts time information of a downstream frame transmitted from the core network side to the wireless mobile terminal side and an upstream frame transmitted from the wireless mobile terminal side to the core network side, Mobile network communication using a mobile network communication path control system that suppresses uplink frame delay that exceeds the communication quality tolerance by judging the frame delay by comparing with the set frame delay tolerance and discarding the delayed frame Road control method. An IP-ATM converter is installed between the ATM-based wireless network control device and the IP-based wireless base station device for connection between the ATM network and the IP network. A mobile network channel control method using a mobile network channel control system that transmits and receives frames from a base station device,
The IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, an uplink CFN extractor, an uplink frame transmitter, a delay calculator, and a delay determiner.
The downlink frame reception unit receives a downlink frame transmitted from the core network side to the radio mobile terminal side from the radio network control device, and sends the downlink frame to the downlink CFN extraction unit,
The downlink CFN extraction unit extracts CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the downlink frame to the downlink frame transmission unit.
The downlink frame transmission unit transmits the downlink frame to the radio base station device,
The uplink frame reception unit receives an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station device, and sends the uplink frame to the uplink CFN extraction unit,
The uplink CFN extraction unit extracts CFN from an uplink frame that has passed through the uplink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the uplink frame to the uplink frame transmission unit.
The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, calculates the delay time when the CFN is delivered from the uplink CFN extraction unit, and calculates all the calculated delay times as the delay Deliver to the judgment part,
When the delay determination unit detects a delay time longer than a predetermined determination time, the delay determination unit sends an uplink frame discard instruction command to the uplink frame transmission unit,
When the uplink frame transmission unit does not receive an uplink frame discard instruction command from the delay determination unit, the uplink frame transmission unit sends an uplink frame to the radio network control device,
The uplink frame transmission unit, when receiving an uplink frame discard instruction command from the delay determination unit, discards the uplink frame and transmits to the radio network control device that the uplink frame is discarded. A mobile network communication path control method using a control system. An IP-ATM converter is installed between the ATM-based wireless network control device and the IP-based wireless base station device for connection between the ATM network and the IP network, and straddles the control range of the wireless network control device. A mobile network communication path control system in which a wireless mobile terminal moving in the network transmits and receives frames from a plurality of the radio base station devices, and the plurality of radio base station devices are subordinate to the different radio network control devices A mobile network communication path control method using
Of the plurality of wireless network control devices, the first primary wireless network control device is a wireless network control device that controls the wireless base station device that communicated first, and the wireless network control device until the call is disconnected. The second radio network controller that communicates via the controller and controls the radio base station that communicates at the destination during communication is configured to transmit and receive a frame to and from the first radio network controller. behavior,
The IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, an uplink CFN extractor, an uplink frame transmitter, a delay calculator, and a delay determiner.
The downlink frame receiving unit receives a downlink frame transmitted from the core network side to the wireless mobile terminal side from the first radio network control device, and sends the downlink frame to the downlink CFN extracting unit,
The downlink CFN extraction unit extracts CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the downlink frame to the downlink frame transmission unit.
The downlink frame transmission unit transmits the downlink frame to the radio base station device,
The uplink frame reception unit receives an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station device, and sends the uplink frame to the uplink CFN extraction unit,
The uplink CFN extraction unit extracts CFN from an uplink frame that has passed through the uplink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the uplink frame to the uplink frame transmission unit.
The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, calculates the delay time when the CFN is delivered from the uplink CFN extraction unit, and calculates all the calculated delay times as the delay Deliver to the judgment part,
When the delay determination unit detects a delay time longer than a predetermined determination time, the delay determination unit sends an uplink frame discard instruction command to the uplink frame transmission unit,
When the uplink frame transmission unit does not receive an instruction to discard the uplink frame from the delay determination unit, the uplink frame transmission unit sends an uplink frame to the first radio network controller,
The uplink frame transmission unit, when receiving an uplink frame discard instruction command from the delay determination unit, discards the uplink frame and transmits to the first radio network controller that the uplink frame has been discarded. A mobile network channel control method using a network channel control system. An IP-ATM converter is installed between the ATM-based first radio network controller, the IP-based radio base station apparatus, and the second radio network controller for connection between the ATM network and the IP network. The wireless mobile terminal that moves across the control range of the wireless network control device transmits and receives frames from the plurality of wireless base station devices, and the plurality of wireless base station devices are different from each other. Is a mobile network communication path control method using a mobile network communication path control system,
Of the plurality of wireless network control devices, the first primary wireless network control device is a wireless network control device that controls the wireless base station device that communicated first, and the wireless network control device until the call is disconnected. The second radio network controller that communicates via the controller and controls the radio base station that communicates at the destination during communication is configured to transmit and receive a frame to and from the first radio network controller. behavior,
The IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, an uplink CFN extractor, an uplink frame transmitter, a delay calculator, and a delay determiner.
The downlink frame receiving unit receives a downlink frame transmitted from the core network side to the wireless mobile terminal side from the first radio network control device, and sends the downlink frame to the downlink CFN extracting unit,
The downlink CFN extraction unit extracts CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the downlink frame to the downlink frame transmission unit.
The downlink frame transmission unit transmits the downlink frame to the radio base station device,
The uplink frame reception unit receives an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station device, and sends the uplink frame to the uplink CFN extraction unit,
The uplink CFN extraction unit extracts CFN from an uplink frame that has passed through the uplink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the uplink frame to the uplink frame transmission unit.
The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, calculates the delay time when the CFN is delivered from the uplink CFN extraction unit, and calculates all the calculated delay times as the delay Deliver to the judgment part,
When the delay determination unit detects a delay time longer than a predetermined determination time, the delay determination unit sends an uplink frame discard instruction command to the uplink frame transmission unit,
When the uplink frame transmission unit does not receive an instruction to discard the uplink frame from the delay determination unit, the uplink frame transmission unit sends an uplink frame to the first radio network controller,
The uplink frame transmission unit, when receiving an uplink frame discard instruction command from the delay determination unit, discards the uplink frame and transmits to the first radio network controller that the uplink frame has been discarded. A mobile network channel control method using a network channel control system. An IP-ATM converter is installed between the IP base radio base station apparatus and the first radio network control apparatus and the ATM base second radio network control apparatus for connection between the ATM network and the IP network. The wireless mobile terminal that moves across the control range of the wireless network control device transmits and receives frames from the plurality of wireless base station devices, and the plurality of wireless base station devices are different from each other. Is a mobile network communication path control method using a mobile network communication path control system,
Of the plurality of wireless network control devices, the first primary wireless network control device is a wireless network control device that controls the wireless base station device that communicated first, and the wireless network control device until the call is disconnected. The second radio network controller that communicates via the controller and controls the radio base station that communicates at the destination during communication is configured to transmit and receive a frame to and from the first radio network controller. behavior,
The IP-ATM converter includes a downlink frame receiver, a downlink CFN extractor, a downlink frame transmitter, an uplink frame receiver, an uplink CFN extractor, an uplink frame transmitter, a delay calculator, and a delay determiner.
The downlink frame receiving unit receives a downlink frame transmitted from the core network side to the wireless mobile terminal side from the first radio network control device, and sends the downlink frame to the downlink CFN extracting unit,
The downlink CFN extraction unit extracts CFN from the downlink frame that has passed through the downlink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the downlink frame to the downlink frame transmission unit.
The downlink frame transmission unit transmits the downlink frame to the radio base station device,
The uplink frame reception unit receives an uplink frame transmitted from the radio mobile terminal side to the core network side from the radio base station device, and sends the uplink frame to the uplink CFN extraction unit,
The uplink CFN extraction unit extracts CFN from an uplink frame that has passed through the uplink CFN extraction unit, passes CFN information to the delay calculation unit, and sends the uplink frame to the uplink frame transmission unit.
The delay calculation unit stores the CFN of the downlink frame from the downlink CFN extraction unit, calculates the delay time when the CFN is delivered from the uplink CFN extraction unit, and calculates all the calculated delay times as the delay Deliver to the judgment part,
When the delay determination unit detects a delay time longer than a predetermined determination time, the delay determination unit sends an uplink frame discard instruction command to the uplink frame transmission unit,
When the uplink frame transmission unit does not receive an instruction to discard the uplink frame from the delay determination unit, the uplink frame transmission unit sends an uplink frame to the first radio network controller,
The uplink frame transmission unit, when receiving an uplink frame discard instruction command from the delay determination unit, discards the uplink frame and transmits to the first radio network controller that the uplink frame has been discarded. A mobile network channel control method using a network channel control system. A program for causing a computer or a microprocessor to execute a mobile network communication path control method using the mobile network communication path control system according to any one of claims 8 to 12.

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