JP5163582B2 - Mobile communication system, communication method thereof, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communication system or the like that reduces the occurrence of system errors. <P>SOLUTION: The mobile communication system includes: a mobile terminal device that is a terminal for executing intermittent transmission/reception of packets with a host device, has a first state that individual channels are assigned and a second state that the individual channels are not assigned but a common channel is assigned respectively as a state related to continuous packet connectivity, and notifies state information regarding the first state or the second state of the mobile terminal device to the host device; and the host device that receives the state information and changes a parameter related to the next state transition when a duration in the second state exceeds a first prescribed period of time after the state transition of the mobile terminal device from the first state to the second state so as to notify the changed parameter to the mobile terminal device. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a mobile communication system, a communication method thereof, and a program, and more particularly, to a control technology for CPC (Continuous Packet Connectivity) in HSPA (High Speed Packet Access) evolution.

  In HSPA evolution in 3GPP (Third Generation Partnership Project) Release 7, it is considered to provide a smooth transition toward the later LTE (Long Term Evolution). One of the functions is CPC for improving the characteristics of the packet non-transmission state. The CPC continues the HSPA state during connection establishment, and suppresses a delay at the time of resuming data transmission / reception by eliminating the transition to the CELL_FACH (CELL_Forward Channel) state during no communication. This function is effective for communication in which data is periodically generated, and the throughput as viewed from the end user is improved.

  As one of the functions related to CPC, an UL DTX / DRX (Uplink Discontinuous Transmission / Reception) function has been introduced. The UL DTX / DRX function stops transmission / reception of a physical channel to suppress interference when there is no communication data or at a low rate, and uses an HSPA-related physical channel only during data communication. The UL DTX function transmits the UL control channel periodically (intermittently) when the UL is inactive, and the UL DRX function is an E-DCH (Enhanced Dedicated) when the UE (User Equipment) is combined with the UL DTX only for a specific time. This is a function for controlling to transmit (Channel).

  In this case, the UE has a status parameter indicating whether the UL DTX / DRX function is enabled / disabled. This status is in a CELL_DCH (CELL_Dedicated Channel) state, and an information element (IE) related to the CPC by an RRC (Radio Resource Control) protocol. This is determined when a setting message having () is received.

  By the way, the UE determines whether the variable CPC_DTX_DRX_STATUS is true or false only when the reconfiguration message is received, and the discontinuous transmission / reception function is applied only to the CELL_DCH state. If the UE uses the discontinuous transmission / reception function and the system has a failure such as a radio link failure, an RLC (Radio Link Control) unrecoverable error, a UE capability information message transmission failure, etc., the UE performs a cell update process. Execute. The UE then transitions from the CELL_DCH state to the CELL_FACH state and selects a suitable UTRA (UMTS radio access) cell. However, the conventional standard does not define anything about the execution method of the discontinuous transmission / reception function in this case. Therefore, after the CELL_DCH state ends, the UE does not redetermine the variable CPC_DTX_DRX_STATUS. In other words, after moving to the CELL_FACH state, the UE is forced to perform a discontinuous transmission / reception function in an unsuitable state, and an error may occur in the physical layer and the MAC layer.

  Therefore, for the purpose of preventing system errors, Patent Document 1 discloses a method and apparatus for improving discontinuous transmission / reception of CPC in a user terminal of a wireless communication system. The method includes activating a discontinuous packet function based on a function state variable value (CPC_DTX_DRX_STATUS), and re-determining the function state variable value when a cell update process is activated, and executing a corresponding operation. Is the method.

JP 2008-141758 A

  The following analysis is given in the present invention.

  By the way, the CPC_DTX_DRX function in the UE determines whether the variable DTX_DRX_STATUS is valid (1) / invalid (0) only when a reconfiguration message is received. In this case, it applies only in the CELL_DCH state. For this reason, a radio link failure occurs due to degradation of the reception environment, etc., and after shifting to the CELL_FACH state, the variable DTX_DRX_STATUS is not judged and the CPC DTX_DRX function operates as it is, and errors occur in Layers 1 and 2 Can happen.

  Specifically, when the UE transitions from the CELL_DCH state to the CELL_FACH state due to a failure in a radio link or the like, a state in which the status of the UL DTX / DRX function is valid can be considered. As a result, a CPC operation that does not match the reception status is performed, and there is a possibility that accurate data transmission / reception cannot be performed. In such a state, the conventional technology cannot cope with it and may lead to a system error.

  Accordingly, an object of the present invention is to provide a mobile communication system, a communication method thereof, and a program for reducing the occurrence of a system error when a CPC DTX_DRX function is changed from a CELL_DCH state to a CELL_FACH state in a UE. .

  A mobile communication system according to one aspect of the present invention is a terminal that performs intermittent packet transmission / reception with a host device, and is assigned a dedicated channel as a state relating to continuous continuity of packets. Mobile terminal that has a state of 1 and a second state in which a dedicated channel is not allocated and a common channel is allocated, and notifies the host device of state information about which state is the first or second state When the mobile terminal device receives state information from the device and the mobile terminal device makes a transition from the first state to the second state and then the duration in the second state exceeds the first predetermined time, the next state A host device that changes a parameter related to the transition and notifies the mobile terminal device of the change.

  According to another aspect of the present invention, there is provided a communication method for a mobile communication system in which a mobile terminal device that intermittently transmits and receives packets to and from a host device has a dedicated channel as a state related to continuous continuity of packets. And a second state in which a dedicated channel is not allocated and a dedicated channel is allocated, and status information regarding which of the first and second states is in the upper apparatus The higher-level device receives the state information, and after the state transition from the first state to the second state, the next state when the duration in the second state exceeds the first predetermined time The parameter related to the transition is changed and notified to the mobile terminal apparatus.

  A mobile terminal apparatus according to still another aspect of the present invention is a terminal that performs intermittent packet transmission / reception with a host apparatus, and is assigned a dedicated channel as a state related to continuous continuity of packets. A first state and a second state in which an individual channel is not allocated and a common channel is allocated, and notifies the host device of status information about which state is the first or second state; After the state transition from the first state to the second state, when the duration in the second state is equal to or longer than the first predetermined time and equal to or shorter than the second predetermined time longer than the first predetermined time The parameter related to the next state transition changed by the above is received from the host device, and the intermittent transmission interval is set to be shortened according to the received parameter.

  A radio network control apparatus according to still another aspect of the present invention is an apparatus that performs intermittent packet transmission / reception with a mobile terminal apparatus, and includes a dedicated channel as a state related to continuous continuity of packets. Mobile terminal apparatus that has a first state in which a dedicated channel is allocated and a second state in which a dedicated channel is not allocated and a common channel is allocated, and which is in the first state or the second state. A receiving unit for receiving from the first state, a first timer for measuring a duration in the second state after the mobile terminal device transitions from the first state to the second state, and a first predetermined time A notification unit that changes a parameter related to the next state transition and notifies the mobile terminal device when the time is exceeded.

  A program according to another aspect of the present invention allocates an individual channel as a state relating to continuous continuity of packets to a computer constituting a mobile terminal device that performs intermittent transmission and reception of packets with a host device. A first state that is assigned and a second state in which the dedicated channel is not assigned and a common channel is assigned, and status information about which state is the first state or the second state is notified to the host device. After the process and the state transition from the first state to the second state, the duration in the second state is equal to or longer than the first predetermined time and not longer than the second predetermined time that is longer than the first predetermined time A process for receiving a parameter related to the next state transition changed by the host apparatus from the host apparatus, and a process for setting the intermittent transmission interval to be shorter according to the received parameter. And, to the execution.

  According to still another aspect of the present invention, there is provided a program for a computer constituting a wireless network control apparatus that performs intermittent packet transmission / reception with a mobile terminal device as a state related to continuous continuity of packets. The mobile terminal has a first state in which a channel is allocated and a second state in which a dedicated channel is not allocated and a dedicated channel is allocated, and status information regarding which of the first and second states is present Processing received from the device, processing in which the mobile terminal device measures the duration in the second state after the state transition from the first state to the second state, and the duration exceeds the first predetermined time In this case, a process for changing a parameter relating to the next state transition and notifying the mobile terminal apparatus is executed.

  According to the present invention, since the parameter relating to the next state transition is changed, the recovery from the error is accelerated, and the occurrence of the system error can be reduced.

It is a block diagram which shows the structure of the high-order apparatus and radio base station apparatus which concern on 1st Example of this invention. It is a block diagram which shows the structure of the mobile terminal apparatus which concerns on 1st Example of this invention. It is a flowchart showing operation | movement of the mobile communication system which concerns on 1st Example of this invention. It is a flowchart showing operation | movement of a CPC DTX_DRX parameter determination part.

  A mobile communication system according to an embodiment of the present invention is a terminal that performs intermittent transmission / reception of packets with a host device (RNC), and is assigned a dedicated channel as a state related to continuous continuity of packets. Mobile terminal that has a state of 1 and a second state in which a dedicated channel is not allocated and a common channel is allocated, and notifies the host device of state information about which state is the first or second state When the device (UE) and the state information are received, and the duration time in the second state exceeds the first predetermined time after the state transition from the first state to the second state by the mobile terminal device A host device that changes a parameter related to the next state transition and notifies the mobile terminal device of the parameter.

  The host device may set the parameter so that the intermittent transmission interval in the mobile terminal device is shortened when the transition to the first state is made in the second predetermined time or less longer than the first predetermined time. Good.

  The host device may notify the mobile terminal device to stop the intermittent packet transmission / reception operation in the mobile terminal device when the duration exceeds the second predetermined time.

  HSPA performs intermittent transmission / reception between the host device and the mobile terminal device, and the first and second states are the CELL_DCH state and the CELL_FACH state, respectively, and the host device receives the mobile terminal device after the CELL_FACH transition. The signal-to-noise ratio at the reception of the terminal device may be determined, and the parameter may be changed so that the intermittent transmission interval becomes shorter as the noise increases.

  Next, the operation of the mobile communication system will be described more specifically. The UE maintains status information even after transition of the CELL_FACH state. However, if the time of transition to the CELL_FACH state is long, the CPC DTX_DRX function is operated with the previous status information at the timing of transition to the CELL_DCH state again. There may be cases where the function does not function.

  Therefore, when the CPC DTX_DRX function is in operation, the UE notifies the RNC of the state information of the CPC DTX_DRX function together with the RACH Measurement Result when the CELL_DCH state transitions to the CELL_FACH state. Note that the CPC status information can be diverted from the variable CPC_DTX_DRX_STATUS and is not new information that is newly required. Therefore, control on the UE side can be realized relatively easily.

  When it takes time until the transition to the CELL_DCH state again, a decrease in the data communication amount at the UE or a decrease due to the radio environment can be considered. Therefore, the RNC starts a timer based on the contents of the RACH Measurement Result CPC state variable, CPICH (Common Pilot Channel) Ec / No, and RSCP (Received Signal Code Power) information received after the transition of the CELL_FACH state.

  When the time until the transition to the CELL_DCH state is long, this timer includes the parameter contents of the CPC DTX_DRX information element (IE) such as cell update confirmation (CELL UPDATA CONFIRM) based on the reception status at the UE in preparation for the next transition. It is used as a guideline for determining. Thus, the RNC determines CPC parameter setting (variable CPC_DTX_DRX_PARAMS) while confirming the reception level status of the user terminal, and controls the CPC DTX_DRX function of the base station and UE.

  As a result, the RNC can determine the CPC parameter setting (variable CPC_DTX_DRX_PARAMS) while confirming the reception level status of the user terminal, and can perform the currently used RRC connection processing (RRC CONNECTION SETUP), cell update confirmation (CELL UPDATE DATA CONFIRM), etc. Can be used.

  FIG. 1 is a block diagram showing configurations of a host device and a radio base station device according to the first embodiment of the present invention. In FIG. 1, the mobile communication system is a mobile communication system that performs HSPA, and a radio network controller (RNC) 1 is connected to a Node B (radio base station apparatus) 2 via Iub as a host apparatus. . The NodeB (radio base station apparatus) 2 is further connected to a UE (mobile device, mobile terminal apparatus) 3 described later by radio.

  The RNC 1 includes a transmission / reception unit 11 that transmits / receives data from the Iub, a control unit 12 that processes RRC messages and the like, and a CPC DTX_DRX parameter determination unit 13 that determines a UL DTX_DRX parameter of a CPC. Note that the RNC 1 may include a computer, and cause the computer 12 to execute a program to cause the control unit 12 and the CPC DTX_DRX parameter determination unit 13 to function.

  The Node B 2 provides the antenna unit 21, the receiving unit 22 including the despreading function, the channel decoding unit 23, the information necessary for the operation of each unit, the control unit 24 that activates, stops, and initializes each unit, and the spreading function. A transmission unit 25, a channel encoding unit 26, and a network unit 27 are provided.

  The uplink signal transmitted from the UE 3 is demodulated by the receiving unit 22 via the antenna unit 21 and subjected to despreading processing. The channel decoding unit 23 performs soft decision processing on the signal output from the reception unit 22 and notifies the network unit 27 of RACH data (message unit) including CPICH Ec / No. Note that Node B 2 need not be specially aware of the inside of RACH data. The control unit 24 performs control to operate the HSPA and CPC DTX_DRX functions in accordance with the CPC parameters set from the RNC 1. The network unit 27 converts the decoded RACH data into a format for notifying the RNC 1 and notifies the RNC 1 via the Iub as a RACH FP.

  FIG. 2 is a block diagram showing the configuration of the mobile terminal apparatus according to the first embodiment of the present invention. In FIG. 2, the UE 3 includes an antenna unit 31, a receiving unit 32, a channel decoding unit 33, a control channel processing unit 34, an E-HICH processing unit 35, an HS-PDSCH processing unit 36, an HSPA control unit 37, and a CPC DTX_DRX function determining unit. 38, CPICH Ec / No, CQI calculator 39, channel encoder 40, and transmitter 41.

  Next, the reception operation and transmission operation of UE3 will be described. Here, it is assumed that the operation of the CPC DTX_DRX function in UE 3 is recognized by RRC (Radio Resource Control) which is a layer 3 message notified from the upper layer.

  The signal transmitted from the NodeB 2 is demodulated by the receiving unit 32 via the antenna unit 31 and subjected to despreading processing. The channel decoding unit 33 obtains an HS-SCCH (High Speed Shared Control Channel) and an HS-PDSCH (High Speed Physical Signal) for an HSDPA (High Speed Downlink Access). A soft output of an E-DPCCH (Enhanced Dedicated Physical Channel) and an E-DPDCH (Enhanced Dedicated Physical Data Channel) with respect to Speed Uplink Packet Access.

  The control channel processing unit 34 decodes HS-SCCH, E-AGCH (Enhanced Absolute Grant Channel), and E-RGCH (Enhanced Referential Grant Channel), and notifies the HSPA control unit 37 whether the decoding is successful. If the decoding is successful, the HSPA control unit 37 is further notified of HS-PDSCH decoding information, E-DPDCH decoding information (ACK / NACK) in the E-HICH processing unit 35, and the like.

  The HS-PDSCH processing unit 36 includes a QPSK and 16QAM demodulator, and receives the HS-PDSCH input to perform demodulation processing. Thereafter, deinterleaver processing is performed, and rate dematching processing (reverse processing of rate matching) is performed. After the rate dematching process, the HS-PDSCH is decoded together with the HS-PDSCH decode information from the HSPA control unit 37, and the CRC (Cyclic Redundancy Check) result is notified to the HSPA control unit 37.

  The CPICH Ec / No, CQI calculating unit 39 inputs CPICH, calculates CPICH Ec / No, RSCP indicating the reception propagation environment, and notifies the HSPA control unit 37 of it.

  The channel coding unit 40 that performs the HS-DPCCH encoding process receives the ACK / NACK and CQI (Channel Quality Indicator) values from the HSPA control unit 37 and generates the HS-DPCCH.

  The HSPA control unit 37 has a function of controlling each unit (indicated by a dotted line), provides information necessary for the operation of each unit, and activates, stops, and initializes each unit.

  Note that the UE 3 may include a computer and cause the computer to execute a program so that some of the above-described units function.

  Next, the operation of the mobile communication system will be described. FIG. 3 is a flowchart showing the operation of the mobile communication system according to the first embodiment of the present invention.

  In step S11, the UE 3 determines whether or not the reception environment has deteriorated during the operation of the CPC DTX_DRX function and has transitioned from the CELL_DCH state to the CELL_FACH state. If the transition is made, the process proceeds to step S12, and if not, the process proceeds to step S14.

  In step S12, UE3 acquires the STATUS information from the CPC DTX_DRX function determination unit 38 at the same time as the transition to the CELL_FACH state.

  In step S13, UE3 incorporates the acquired STATUS information into RACH data (RACH Measurement Result).

  In step S14, the CPICH Ec / No and CPICH Ec / No acquired from the CQI calculating unit 39 are notified to the HSPA control unit 37.

  In step S15, UE3 incorporates CPICH Ec / No obtained by the HSPA control unit 37 into RACH data, and transmits it to NodeB2 by PRACH (Physical Random Access Channel) in step S16. At this time, DTX_DRX_STATUS information is included in the RACH data after transition to the CELL_FACH state and transmitted to the NodeB 2.

  Node B 2 decodes the received PRACH in step S 17, sends it to Iub as RACH FP (Frame Protocol) in step S 18, and notifies RNC 1.

  In step S19, the RNC 1 determines whether or not the corresponding UE 3 is in the CELL_FACH state. If the UE 3 is not in the CELL_FACH state, the process ends.

  When UE3 is in the CELL_FACH state, in step S20, the RNC 1 determines whether or not the RACH FP (Measurement Result) transmitted after the UE3 transitions to the CELL_FACH state is received. If not received, the process is terminated. If it is received, CPICH Ec / No and DTX_DRX_STATUS information are extracted in step S21.

  In step S22, RNC1 confirms the CPC activation state of UE3 based on the DTX_DRX_STATUS information. If the CPC activation state is invalid (0), the process is terminated without performing the process in the CPC DTX_DRX parameter determination unit 13.

  If the CPC activation state is valid (1), processing in a CPC DTX_DRX parameter determination unit 13 described later is executed in step S23.

  Next, the operation of the CPC DTX_DRX parameter determination unit 13 in the RNC 1 will be described. FIG. 4 is a flowchart showing the operation of the CPC DTX_DRX parameter determination unit 13.

  The CPC DTX_DRX parameter determination unit 13 starts a timer (T_CPC_DTX_DRX) for determining parameters and operation control to be used in the CPC DTX_DRX function when it is determined that the corresponding UE 3 is a CPC setting user. Here, two types of timers are prepared, the T_CPC_DTX_DRX_step1 timer that starts from the timing of transition from the CELL_DCH state to the CELL_FACH state, and the T_CPC_DTX_DRX_step2 timer that starts next when the T_CPC_DTX_DRX_step1 timer expires

  In step S31, the T_CPC_DTX_DRX_step1 timer is started.

  If the T_CPC_DTX_DRX_step1 timer expires (Yes in step S33) and transitions to the CELL_DCH state (Yes in step S32), the T_CPC_DTX_DRX_step1 timer is stopped (step S38), and the parameters when the CPC status information is received Is stored in the CPC DTX_DRX parameter determination unit 13 so as to reset (step S41).

  If the T_CPC_DTX_DRX_step1 timer has expired, the T_CPC_DTX_DRX_step2 timer is started (step S34).

  After the T_CPC_DTX_DRX_step2 timer is started, if the state transits to the CELL_DCH state before the timer expires (Yes in step S35), the T_CPC_DTX_DRX_step2 timer is stopped (step S37) and the CPC parameter is changed (step S40). CPC DTX_DRX is determined by changing the CPC parameters so that the intermittent transmission interval is shortened based on the reception status of UE3 notified by RACH Measurement Result at that time (for example, the signal-to-noise power ratio such as CPICH Ec / No). The parameter determination unit 13 holds it. In this case, it is preferable to set the intermittent transmission interval to be shorter when the reception condition is worse, that is, as the signal-to-noise power ratio is smaller. For example, if PCPICH Ec / No is X [dB] lower than the threshold level when transitioning from the normal CELL_FACH state to the CELL_DCH state, the larger the X, the more the reception environment deteriorates even if the transition to the CELL_DCH state occurs. It operates by judging that there is a high degree. Since X [dB] is an experimental parameter, its value is not mentioned here. It is possible to specify from the threshold value used in actual operation.

  When the T_CPC_DTX_DRX_step2 timer expires (Yes in step S36), even if a transition to the CELL_DCH state is performed, the CPC DTX_DRX function is not operated immediately after the transition and the function is turned off (step S39).

  NBAP (Node B Application Protocol), RRC CONNECTION SETUP, and CELL UPDATA CONFIRM, which are finally determined as CPC parameters and are notified to NodeB2 and UE3, are notified to UE3 via NodeB2 (step S42).

  In the mobile communication system that operates as described above, when the T_CPC_DTX_DRX_step2 timer is started and then transitions to the CELL_DCH state before this timer expires, the UE3 changes the CPC parameter information so that the intermittent transmission interval is shortened. Receive. Therefore, even if the reception status of the UE 3 is bad and an error occurs, since the intermittent transmission interval is short, it is possible to recover from the error immediately by transmitting a large number of packets. For this reason, the case where it falls into a system error can be reduced.

  It should be noted that the disclosures of the aforementioned patent documents and the like are incorporated herein by reference. Within the scope of the entire disclosure (including claims) of the present invention, the embodiments and examples can be changed and adjusted based on the basic technical concept. Various combinations and selections of various disclosed elements are possible within the scope of the claims of the present invention. That is, the present invention of course includes various variations and modifications that could be made by those skilled in the art according to the entire disclosure including the claims and the technical idea.

1 RNC (Radio Network Controller)
2 NodeB (radio base station equipment)
3 UE (mobile device)
DESCRIPTION OF SYMBOLS 11 Transmission / reception part 12 Control part 13 CPC DTX_DRX parameter determination part 21 Antenna part 22 Reception part 23 including a de-spreading function Channel decoding part 24 Control part 25 Transmission part 26 Channel encoding part 27 Network part 31 Antenna part 32 Reception part 33 Channel decoding Unit 34 control channel processing unit 35 E-HICH processing unit 36 HS-PDSCH processing unit 37 HSPA control unit 38 CPC DTX_DRX function determination unit 39 CPICH Ec / No, CQI calculation unit 40 channel coding unit 41 transmission unit

Claims (18)

A terminal that intermittently transmits and receives packets to and from a higher-level device, and a state related to continuous continuity of packets is a first state in which a dedicated channel is allocated and a common channel in which a dedicated channel is not allocated. A mobile terminal device having two states and notifying the host device of state information about which state is the first state or the second state;
When the state information is received and the duration time in the second state exceeds the first predetermined time after the state transition from the first state to the second state, the next state transition The host device that changes the parameter according to the notification to the mobile terminal device;
A mobile communication system comprising:   When the higher-level device makes a transition to the first state within a second predetermined time that is longer than the first predetermined time, the higher-level device sets the parameter so that the intermittent transmission interval in the mobile terminal device becomes shorter. The mobile communication system according to claim 1, wherein the mobile communication system is set.   3. The higher-order apparatus notifies the mobile terminal apparatus to stop intermittent packet transmission / reception operation in the mobile terminal apparatus when the duration exceeds the second predetermined time. The mobile communication system described. Intermittent transmission / reception by HSPA between the host device and the mobile terminal device,
The first and second states are a CELL_DCH state and a CELL_FACH state, respectively,
The host apparatus determines a signal-to-noise ratio in reception of the mobile terminal apparatus received after the CELL_FACH transition from the mobile terminal apparatus, and changes the parameter so that the intermittent transmission interval becomes shorter as the noise increases. The mobile communication system according to claim 2. The mobile terminal device that performs intermittent packet transmission / reception with the host device is in a state related to the continuous continuity of the packet in the first state in which the dedicated channel is allocated and in which the dedicated channel is not allocated and the common channel is allocated. Two states, and notifies the host device of state information about which state is the first state or the second state,
The host device receives the state information, and after the state transition from the first state to the second state, when the duration in the second state exceeds a first predetermined time, A communication method for a mobile communication system, characterized in that a parameter related to a state transition is changed and notified to the mobile terminal device.   When the higher-level device makes a transition to the first state within a second predetermined time that is longer than the first predetermined time, the higher-level device sets the parameter so that the intermittent transmission interval in the mobile terminal device becomes shorter. 6. The communication method for a mobile communication system according to claim 5, wherein the communication method is set.   7. The higher order apparatus notifies the mobile terminal apparatus to stop intermittent packet transmission / reception operation in the mobile terminal apparatus when the duration exceeds the second predetermined time. A communication method of the mobile communication system described. Intermittent transmission / reception by HSPA is performed between the host device and the mobile terminal device,
The first and second states are a CELL_DCH state and a CELL_FACH state, respectively,
The higher-order apparatus determines a signal-to-noise ratio in reception of the mobile terminal apparatus received after the CELL_FACH transition from the mobile terminal apparatus, and changes the parameter so that the intermittent transmission interval becomes shorter as the noise increases. The communication method of the mobile communication system according to claim 6, wherein: A terminal that performs intermittent transmission and reception of packets with a host device,
As states relating to continuous continuity of packets, there are a first state in which an individual channel is assigned and a second state in which an individual channel is not assigned and a common channel is assigned, whichever one of the first and second states Status information about whether it is in the state of
After the state transition from the first state to the second state, the duration in the second state is not less than the first predetermined time and not longer than the second predetermined time that is longer than the first predetermined time. A parameter related to the next state transition changed by the host device is received from the host device,
A mobile terminal apparatus, wherein the intermittent transmission interval is set to be shorter according to the received parameter.   The mobile terminal apparatus according to claim 9, wherein when the duration exceeds the second predetermined time, an instruction to stop intermittent packet transmission / reception is received from the host apparatus. A device that performs intermittent transmission and reception of packets with a mobile terminal device,
As states relating to continuous continuity of packets, there are a first state in which an individual channel is assigned and a second state in which an individual channel is not assigned and a common channel is assigned, whichever one of the first and second states Receiving from the mobile terminal device status information about whether or not
A first timer for measuring a duration in the second state after the mobile terminal device transitions from the first state to the second state;
A notification unit for changing a parameter related to a next state transition and notifying the mobile terminal device when the duration exceeds a first predetermined time;
A wireless network control device comprising:   The parameter is set so that the intermittent transmission interval in the mobile terminal apparatus is shortened when the duration is changed to the first state within a second predetermined time longer than the first predetermined time. The wireless network control device according to claim 11. A second timer for measuring the second predetermined period of time;
The notifying unit notifies the mobile terminal device to stop intermittent packet transmission / reception operation in the mobile terminal device when the duration exceeds the second predetermined time. The wireless network control device described. In a computer constituting a mobile terminal device that performs intermittent transmission and reception of packets with a host device,
As states relating to continuous continuity of packets, there are a first state in which an individual channel is assigned and a second state in which an individual channel is not assigned and a common channel is assigned, whichever one of the first and second states A process for notifying the higher-level device of status information about whether or not
After the state transition from the first state to the second state, the duration in the second state is not less than the first predetermined time and not longer than the second predetermined time that is longer than the first predetermined time. Receiving from the host device a parameter related to the next state transition changed by the host device;
Processing for setting the intermittent transmission interval to be shorter according to the received parameter;
A program that executes   The program according to claim 14, further executing a process of receiving an instruction to stop intermittent packet transmission / reception from the host device when the duration exceeds the second predetermined time. In a computer constituting a wireless network control device that performs intermittent transmission and reception of packets with a mobile terminal device,
As states relating to continuous continuity of packets, there are a first state in which an individual channel is assigned and a second state in which an individual channel is not assigned and a common channel is assigned, whichever one of the first and second states Receiving from the mobile terminal device status information about whether or not
A process in which the mobile terminal device measures a duration in the second state after the state transition from the first state to the second state;
A process of changing a parameter related to a next state transition and notifying the mobile terminal device when the duration exceeds a first predetermined time; and
A program that executes   The parameter is set so that the intermittent transmission interval in the mobile terminal apparatus is shortened when the duration is changed to the first state within a second predetermined time longer than the first predetermined time. Program.   The program according to claim 17, further causing a process of notifying the mobile terminal device to stop an intermittent packet transmission / reception operation in the mobile terminal device when the duration time exceeds the second predetermined time.

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