JP2007150745A - Method for resending data of radio communication system, mobile terminal and fixed terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically transmit a data acquired up to that time to a fixed terminal by a mobile terminal when the mobile terminal enters the radio-communication range of the fixed terminal, and to efficiently resend the data left without a transmission when the mobile terminal next enters the radio-communication range. <P>SOLUTION: The mobile terminal stores collected data as old data when a communication with the fixed terminal is interrupted by a separation from the radio-communication range before the transmission of the collected data is completed. The mobile terminal transmits the up-to-date collected data stored up to that time, and practices a procedure transmitting the old data not transmitted yet when a link is established with the fixed terminal by an entering into the radio-communication range. The fixed terminal stores received data up to that time as the old data when the communication with the mobile terminal is interrupted before the reception of the collected data is completed. The fixed terminal receives the up-to-date collected data first, and practices the procedure receiving the old data transmitted from the mobile terminal when the link is established with the mobile terminal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless communication system including a mobile terminal having a function of collecting data and a fixed terminal to which data is transferred from the mobile terminal. When the mobile terminal enters the wireless communication area of the fixed terminal, the link is established between the terminals. If the mobile terminal sends data collected until the link is established to the fixed terminal, and the mobile terminal leaves the wireless communication area before completing the transmission of all data, the remaining data that cannot be transmitted The present invention relates to a data retransmission method for retransmission. The present invention also relates to a mobile terminal and a fixed terminal to which the data retransmission method of the present invention is applied.

  As shown in FIG. 1, the wireless communication system assumed in the present invention includes a mobile terminal (child device, sensor) 10 and a fixed terminal (parent device, data recording server) 20. The mobile terminal 10 collects data such as sensor information while entering and exiting the wireless communication area 30 of the fixed terminal 20, and when the mobile terminal 10 enters the wireless communication area 30, the data collected so far is stored in the fixed terminal 20. Send.

  In the example illustrated in FIG. 1, the mobile terminal 10 collects data while moving from A to B outside the wireless communication area 30 of the fixed terminal 20. On the other hand, the fixed terminal 20 transmits a beacon and waits for a connection request from the mobile terminal 20. When the mobile terminal 10 enters the wireless communication area 30 of the fixed terminal 20 in B, the mobile terminal 10 receives a beacon and transmits a connection request signal, and the fixed terminal 20 that receives the connection request signal transmits a connection response signal. As a result, a link is established between the mobile terminal 10 and the fixed terminal 20. The mobile terminal 10 transmits the collected data of A to B to the fixed terminal 20 while moving from B to C in the wireless communication area 30. When the mobile terminal 10 goes out of the wireless communication line 30 at C, data is collected again. Similarly, the mobile terminal 10 collects data between C and D, transmits the collected data between D and E to the fixed terminal 20, collects data between E and F, and fixes the collected data between F and F. It transmits to the terminal 20.

In the system described in Patent Document 1, a measurement subject wears a sensor and acquires his or her physiological data, and the acquired physiological data is transmitted to a data recording server by wireless communication at a set cycle (immediate data transfer). . Here, when the measurement subject moves outside the wireless communication area of the data recording server, the immediate data transfer is interrupted, and the physiological data acquired thereafter is recorded in the external memory. When the measured person enters the wireless communication area, the data transfer is reunited. In addition, the physiological data recorded in the external memory interrupts immediate data transfer by a command operation and transmits the data to a data recording server by wireless communication.
JP 2004-313419 A

  In the system described in Patent Document 1, as shown in FIG. 1, when the person being measured (mobile terminal 10) is often outside the wireless communication area (30) of the data recording server (fixed terminal 20). It is convenient to establish a link with the data recording server automatically without command operation when the measured person enters the wireless communication area and to transfer data acquired outside the wireless communication area. In addition, it is convenient if there is a means that can automatically retransmit the remaining data without being transmitted when the subject moves outside the wireless communication area during data transmission.

  When the mobile terminal enters the wireless communication area of the fixed terminal, the mobile terminal can automatically transmit the data acquired so far to the fixed terminal, and the remaining data that cannot be transmitted next is wirelessly transmitted. It is an object of the present invention to provide a data retransmission method, a mobile terminal, and a fixed terminal of a wireless communication system that can efficiently retransmit when entering a communication area.

  According to a first aspect of the present invention, a fixed terminal that forms a wireless communication area and a wireless communication area of the fixed terminal enter and exit the wireless communication area, collect data when a link is not established with the fixed terminal, and link to the fixed terminal in the wireless communication area In a wireless communication system including a mobile terminal that transmits collected data to a fixed terminal when establishing a communication terminal, the mobile terminal leaves the wireless communication area and terminates communication with the fixed terminal before finishing transmission of the collected data In this case, the collected data is stored as old data, and when the link is established with the fixed terminal after entering the wireless communication area, the latest collected data accumulated so far is transmitted first, and then transmission is not completed. If the communication with the mobile terminal is interrupted before receiving the collected data, the fixed terminal stores the previous received data as the old data, and then the mobile terminal And when establishing a link, first receive the latest collected data, to perform the steps of receiving old data is subsequently transmitted from the mobile terminal.

  If the mobile terminal does not receive the data response signal transmitted from the fixed terminal within a predetermined time Tack after the transmission of the collected data, the mobile terminal retransmits the collected data, and the collected data when the number of retransmissions reaches a specified value. It is determined that the communication with the fixed terminal is interrupted.

  The fixed terminal transmits a data response signal notifying the reception state of the collected data, and does not transmit the data response signal when the number of times of transmitting the data response signal indicating that the collected data cannot be normally received reaches a specified value. It is determined that communication with the mobile terminal has been interrupted.

  In addition, the mobile terminal divides the collected data into one or more fragments, generates one or more sequence data in which a predetermined number of fragments are collected, calculates the data division conditions, and establishes a link with the fixed terminal. At this time, a connection request signal including the data division condition is transmitted, and the fixed terminal confirms the data division condition by receiving the connection request signal and transmits a connection response signal. The mobile terminal and the fixed terminal transmit the connection request signal. After transmission / reception of the connection response signal, transmission / reception of collected data and transmission / reception of old data that has not been transmitted / received are performed in sequence data.

  Here, when communication with the mobile terminal is interrupted, the fixed terminal records the data division condition of the collected data being received and the next transmission start sequence number, and then establishes a link with the mobile terminal and updates the latest After receiving the collected data, the mobile terminal transmits the old data request signal including the data division condition and the next transmission start sequence number, and the mobile terminal receives the old data request signal and receives the data division condition and the next transmission start sequence number. The fixed terminal and the mobile terminal transmit / receive sequence data that has not been transmitted / received among the old data based on the data division condition obtained in response to transmission / reception of the old data request signal and the next transmission start sequence number. It may be.

  In addition, when communication with the fixed terminal is interrupted, the mobile terminal records the data division condition of the collected data being transmitted and the next transmission start sequence number, and then establishes a link with the fixed terminal and collects the latest collection. After the data transmission is completed, the fixed terminal transmits the old data transmission start signal including the data division condition and the next transmission start sequence number, and the fixed terminal receives the old data transmission start signal and receives the data division condition and the next transmission start sequence. Confirm the number and send the corresponding old data transmission start response signal, and the mobile terminal and the fixed terminal will transmit the old data transmission start signal and the old data transmission start response signal. Based on the start sequence number, sequence data that has not been transmitted / received among the old data may be transmitted / received.

  In addition, the fixed terminal records the next transmission start sequence number of the collected data being received when communication with the mobile terminal is interrupted, and is transmitted from the mobile terminal when establishing a link with the mobile terminal next time. In response to the connection request signal, the mobile terminal transmits a connection response signal including the next transmission start sequence number, and when communication with the fixed terminal is interrupted, the mobile terminal records the data division condition of the collected data being transmitted, and When establishing a link with a fixed terminal, confirm the next transmission start sequence number by receiving a connection response signal, and after sending the latest collected data, send an old data transmission start signal including the data division condition, The fixed terminal confirms the data division condition by receiving the old data transmission start signal, transmits the corresponding old data transmission start response signal, and the mobile terminal and the fixed terminal transmit the old data transmission start signal. And on the basis of the data division conditions and subsequent transmission start sequence number obtained in accordance with the transmission and reception of the old data transmission start response signal, it may perform transmission and reception of the sequence data transceiver outstanding among the old data.

  Further, the mobile terminal and the fixed terminal may omit the latest collection data transmission / reception process when the mobile terminal does not have the latest collection data, and may perform the process according to the presence / absence of old data that has not been transmitted. .

  According to a second aspect of the present invention, a fixed terminal that forms a wireless communication area and a wireless communication area of the fixed terminal are collected and collected when the link is not established with the fixed terminal. In a mobile terminal of a wireless communication system having a mobile terminal that transmits collected data to the fixed terminal when establishing the communication, the communication with the fixed terminal is interrupted by leaving the wireless communication area before finishing the transmission of the collected data If the collected data is stored as old data, then when the wireless communication area is entered and the link is established with the fixed terminal, the latest collected data accumulated so far is transmitted first, and then the transmission is incomplete Means for transmitting old data are provided.

  In addition, the mobile terminal divides the collected data into one or more fragments, generates one or more sequence data in which a predetermined number of fragments are collected, calculates the data division conditions, and establishes a link with the fixed terminal. Means for transmitting a connection request signal including this data division condition at the time of transmission, and after receiving a connection response signal from the fixed terminal in response to the connection request signal, transmission of collected data and transmission of collected data not yet completed in units of sequence data Means for performing transmission.

  According to a third aspect of the present invention, a fixed terminal that forms a wireless communication area and a wireless communication area of the fixed terminal enter / exit, collect data when a link is not established with the fixed terminal, and link to the fixed terminal within the wireless communication area In a fixed terminal of a wireless communication system including a mobile terminal that transmits collected data to the fixed terminal when the communication data is established, if the communication with the mobile terminal is interrupted before finishing the reception of the collected data, A means for storing data as old data, and receiving the latest collected data first when the link is established with the mobile terminal, and then receiving the previous untransmitted old data transmitted from the mobile terminal. Prepare.

  In addition, the fixed terminal divides the collected data into one or a plurality of fragments at the mobile terminal, and further generates a connection request signal including a data division condition indicating that one or a plurality of sequence data in which a predetermined number of fragments are collected is generated, The means for receiving the data division condition received when establishing a link with the mobile terminal, transmitting the corresponding connection response signal, and the transmission / reception of the connection request signal and the connection response signal. Means for receiving old data that has not been received and transmitted.

  The present invention can retransmit old data that was previously transmitted / received between the mobile terminal and the fixed terminal when the link is established next time, and can retransmit the incomplete transmission / reception portion of the old data. Can be retransmitted. In addition, even if there is old data that has not been transmitted / received, the transmission / reception of the latest collected data is given priority, and if the transmission / reception of the latest collected data is interrupted, the previous old data is discarded. Can be retransmitted. The discarded old data can be recovered later if the mobile terminal is provided with a backup data storage unit, for example.

  In the wireless communication system assumed in the present invention, as shown in FIG. 1, the mobile terminal 10 collects data such as sensor information outside the wireless communication area 30 of the fixed terminal 20 and enters the wireless communication area 30. When entered, the collected data is transmitted to the fixed terminal 20. In the data retransmission method of the present invention, when the mobile terminal 10 is in the wireless communication area 30 of the fixed terminal 20 (B to C in FIG. 1), the remaining data (old data) that cannot be transmitted is then wirelessly transmitted. Retransmission processing performed for a data response signal (ACK, NACK) during data transmission in the wireless communication area 30 is characterized by a method of retransmitting when entering the communication area 30 (D to E in FIG. 1). Shall be performed separately. In the following description, first, a method in which a mobile terminal transmits collected data by dividing it into fragments and a retransmission process performed during data transmission will be described with reference to FIG. 2 to FIG. The old data retransmission process in the present invention will be described.

(Division method of collected data)
FIG. 2 shows a method of dividing collected data used in the data retransmission method of the present invention. In the present invention, the data collected by the mobile terminal is divided into fragments of size D that can be transmitted in one wireless packet. Then, a unit in which N fragments are collected in order from the top is defined as a sequence, and M sequences are formed. If the collected data is of a size that can be transmitted in one wireless packet, the process of dividing into fragments is not performed, and one fragment and one sequence are transmitted. Therefore, N is an integer of 1 or more, and M is an integer of 1 or more. Further, the number of sequences M is determined by dividing the data by the size D × N of one sequence. When the number of fragments of the Mth sequence is less than N, it is supplemented with dummy data. The size of the dummy data is (D × N × M− (data capacity)). A data frame (MAC frame) is formed by adding a header and FCS to each fragment thus divided. The header stores a transmission source (mobile terminal) ID, a destination (fixed terminal) ID, a sequence number, a fragment number, and the like. The fixed terminal recognizes the sequence number and the fragment number from the header of the received data frame.

  In the present invention, data transmission / reception between a mobile terminal and a fixed terminal is performed in sequence units, and sequence unit data (N fragments) is referred to as sequence data. Further, the data response signal is sent to the mobile terminal in response to the data response signal “There is an unreceived fragment” transmitted from the fixed terminal when the sequence data is not correctly received by the fixed terminal, or after the transmission of the sequence data from the mobile terminal is completed. If not received, the mobile terminal retransmits the sequence data. At this time, it is possible to either retransmit all fragments of sequence data or retransmit only unreceived fragments, but in the following description, first, retransmission of all fragments will be described as an example.

(Send / receive sequence data, resend all fragments)
FIG. 3 shows a sequence data transmission procedure of the mobile terminal. FIG. 4 shows a sequence data reception procedure of the fixed terminal. 5 to 7 show examples of transmission / reception of sequence data and retransmission of all fragments.

  In FIG. 3, the mobile terminal sets all fragments of the sequence data in the transmission unit, and resets the sequence transmission frequency Np (Np = 0) (S101). Next, the fragment number k is reset (k = 0) (S102), and the fragments of fragment numbers 1 to N are sequentially transmitted at intervals of time Ta (S103 to S108). Note that processing when a data response signal is received during transmission of a fragment in S108 will be described separately.

  When transmission of all fragments in one sequence is completed, measurement of the reception waiting time Tack of the data response signal transmitted from the fixed terminal is started (S105, S110). When the data response signal is received within the time Tack from the completion of transmission of all the fragments of one sequence, the contents of the data response signal are confirmed (S111, S112, S113). In the data response signal, the reception state of the sequence data in the fixed terminal is recorded (“All fragments have been received” when received correctly, “There are unreceived fragments” when not received correctly). If it is confirmed in S113 that all fragments have been received, the sequence data transmission is completed (S114).

  On the other hand, when the time Tack elapses because the data response signal cannot be received in S111, or when the data response signal described as “There is an unreceived fragment” is received in S112 and S113, the sequence transmission count Np is specified. It is determined whether or not the value P (P is an integer equal to or greater than 1) (S115). If it is less than the specified value P, the sequence transmission count Np is incremented (S116), and the process returns to S102 to retransmit all fragments. I do. On the other hand, if the sequence transmission count Np has reached the specified value P, it is processed as sequence data transmission interruption (S117). In other words, if the sequence data has not been completely transmitted, the retransmission process is repeated P times at most (the number of sequence data transmission times is at most (P + 1) times).

  In FIG. 4, the fixed terminal resets the data response signal transmission count (sequence data reception count) Ns (Ns = 0) (S201). Next, measurement of the sequence data reception waiting time Tad is started (S202). If any signal is received within the time Tad, it is determined whether or not the fragment has been correctly received (S203, S204, S205). If it is received correctly, the received fragment is recorded in the sequence data storage unit (S206). Next, it is determined whether or not all fragments of sequence data have been received (S207). If all fragments have been received, a data response signal in which “all fragments have been received” is transmitted (S208). It is processed as reception completion (S209). On the other hand, if not all the fragments of the sequence data have been received, the process returns to the measurement of the reception waiting time Tad of the next fragment (S207, S202).

  On the other hand, even if the mobile terminal has finished transmitting all the fragments of the sequence data, if part or all of the fragments of the sequence data are not received by the fixed terminal, the time Tad is over in S203. If the time Tad has passed in S203, or if the fragment cannot be received correctly in S205, it is determined whether or not the data response signal transmission count Ns is a specified value S (S is an integer of 1 or more) (S210). ), If less than the prescribed value S, the data response signal transmission count Ns is incremented (S211), a data response signal in which “there is an unreceived fragment” is transmitted (S212), and the sequence data is returned to S202 and retransmitted. Receive processing. If the number Ns of data response signal transmissions has reached the specified value S, it is processed as sequence data reception interruption (S213). That is, if the sequence data is not completely received, the data response signal transmission process for requesting retransmission is repeated S times at most.

  If the fixed terminal becomes NG in the fragment confirmation in S205 while receiving the sequence data, it transmits a data response signal stating “There is an unreceived fragment”, and the mobile terminal transmits the data during the sequence data transmission. 3, the reception of the data response signal is confirmed, the transmission of the sequence data is interrupted via S113 and S115, and the retransmission from the first fragment or the sequence data transmission is interrupted.

  The example shown in FIG. 5 shows a case where there is no retransmission. The mobile terminal receives a beacon transmitted from the fixed terminal, transmits a connection request signal, and the fixed terminal that receives the connection request signal transmits a connection response signal, thereby linking between the mobile terminal and the fixed terminal. Established. When the N fragments of sequence data 1 are successfully transmitted from the mobile terminal to the fixed terminal, the fixed terminal transmits a data response signal in which “all fragments have been received” and the mobile terminal receives the data response signal. Then, the next sequence data 2 is transmitted.

  The example shown in FIG. 6 shows a case where there is a retransmission. When reception of all fragments is not completed even after time Tad has elapsed since the last terminal received the last fragment of sequence data m, the mobile terminal transmits a data response signal in which “there is an unreceived fragment”. Performs retransmission of the sequence data m. In addition, the mobile terminal transmits (retransmits) the sequence data m, and the fixed terminal receives the sequence data m and transmits a data response signal of “all fragments received”. When the time Tack elapses without receiving a signal, the mobile terminal retransmits the sequence data m. In the latter case, the sequence data m is not transmitted in the mobile terminal and has been received in the fixed terminal, and is handled differently in the old data retransmission process described later.

  The example shown in FIG. 7 shows a case where the number of retransmissions between the mobile terminal and the fixed terminal is limited. For example, even if the mobile terminal goes out of the wireless communication area of the fixed terminal during transmission of the sequence data and the communication is interrupted, the sequence data m of the sequence data m can be obtained even if the data response signal transmission count Ns of the fixed terminal reaches the specified value S. If the reception is not completed, the sequence data reception is interrupted (FIG. 4: S213), and the fixed terminal transmits a beacon without transmitting a data response signal. On the other hand, in the mobile terminal, if the transmission of the sequence data m is not completed even when the sequence transmission count Np reaches the specified value P, the sequence data transmission is interrupted (FIG. 3: S117), and the fixed data terminal is transmitted without transmitting the sequence data m. The beacon transmitted from is monitored and a connection request signal is transmitted in response to the reception of the beacon. Normally, in situations where sequence data reception is interrupted at the fixed terminal and sequence transmission is interrupted at the mobile terminal, the mobile terminal is often out of the wireless communication area of the fixed terminal, and the mobile terminal again performs wireless communication with the fixed terminal. You will receive a beacon when you enter the area.

  Further, in the example shown in the first half of FIG. 6, when a part of the fragment of the sequence data m is missing and the reception of the sequence data m is not completed even when the last fragment N is received, the fixed terminal times out the time Tad. Transmits a data response signal “with unreceived fragment”, and the mobile terminal receives it and retransmits fragment m. On the other hand, in the example shown in FIG. 7, the communication is interrupted during transmission / reception of the sequence data m, and the fixed terminal transmits a data response signal “There is an unreceived fragment” due to time-out of time Tad. It does not reach the mobile terminal. In this case, the mobile terminal retransmits the sequence data m due to the time-out timeout in S111 of FIG. In this case, the retransmission process of the mobile terminal and the transmission process of the data response signal of the fixed terminal are performed independently of each other.

  The sequence data retransmission processing described above is performed when all fragments of sequence data are retransmitted, but it is also possible to retransmit only unreceived fragments. In this case, the mobile terminal and the fixed terminal are provided with a fragment table that describes the status of each transmission / reception fragment, and the contents of the fragment table are put in the data response signal transmitted from the fixed terminal. The mobile terminal determines and retransmits a fragment to be retransmitted according to the contents of the fragment table of the fixed terminal. When the data response signal is not received by the mobile terminal, the fragment table of the mobile terminal is reset and all fragments of the sequence data are retransmitted. Even in such a method, the number of sequence transmissions Np in the mobile terminal and the number of data response signal transmissions Ns in the fixed terminal can be limited as described above.

(First embodiment)
FIG. 8 shows a processing procedure of the mobile terminal according to the first embodiment of the data retransmission method of the present invention. FIG. 9 shows a processing procedure of the fixed terminal according to the first embodiment of the data retransmission method of the present invention. 10 to 15 show the main part configuration and transmission / reception examples of the mobile terminal and fixed terminal of the first embodiment.

(Data collection to link establishment)
8 and 10, the mobile terminal first resets the number of connections i with the fixed terminal (i = 0), then increments the number of connections i (S11, S12), and out of the fixed terminal's wireless communication range (see FIG. 8). Data collection is performed at time t10 to t11), and the collected data is stored in the collected data storage unit 11 (S13). At this time, the mobile terminal is in a beacon reception waiting state from the fixed terminal (S14), and when the mobile terminal recognizes that it has entered the wireless communication area of the fixed terminal by receiving a beacon, the data collection is stopped and the collected data size is set to The data division condition (fragment size Di, one sequence fragment number Ni, sequence number Mi) is calculated by checking (S15). Next, the mobile terminal transmits a connection request signal describing the presence / absence of old data that could not be transmitted at the time of the previous link establishment and the data division condition (Di, Ni, Mi) of the collected data. Measurement of the connection response signal reception waiting time Tres is started (S16). If there is no collected data, D i = 0, N i = 1, M i = 1 instead of dummy data of size 0. When the mobile terminal receives a connection response signal transmitted from the fixed terminal within the reception waiting time Tres after transmitting the connection request signal, it determines that the link with the fixed terminal has been established, and generates and transmits sequence data. (S17, S18, S19 ~). If the connection response signal is not received and a timeout occurs, the sequence data is not transmitted and the fixed terminal is out of the wireless communication area, so the process of S13 is performed without incrementing the connection count i. Return to resume data collection.

  In FIG. 9 and FIG. 10, the fixed terminal resets the connection count i with the mobile terminal (i = 0), and indicates whether there is an old data request for requesting retransmission of old data that could not be received at the previous link establishment. The parameter R is reset (R = 0) (S51). The parameter R is R = 1 when old data is requested and R = 0 when no old data is requested. Next, beacons are broadcast at regular or random time intervals, and repeated until a connection request signal is received from the mobile terminal (S52, S53). Next, when a connection request signal is received from the mobile terminal, the presence / absence of old data described in the connection request signal and the data division condition (Di, Ni, Mi) of the collected data are confirmed (S54). Here, considering the situation where the mobile terminal has old data and the fixed terminal has no old data request (R = 0) (when communication is interrupted in FIG. 6), the processing of S81 to S83 is necessary. Separately described. Here, the connection count i is incremented after S54 (S55), and a connection response signal is transmitted to the mobile terminal (S56). The presence / absence of old data request (parameter R) is described in the connection response signal, which will be described separately.

(Send / receive sequence data)
In FIG. 8 and FIG. 10, when the mobile terminal receives the connection response signal from the fixed terminal in S18, confirms the link establishment, and enters the sequence data generation / transmission process, it first stores it in the collected data storage unit 11. The data is moved to the latest data storage unit 12 (S19). Next, the latest data moved to the latest data storage unit 12 is divided into fragments according to the data division condition, and sequence data is generated (S20). In FIG. 10, M1 sequence data 1 to M1 including N1 fragments in one sequence data are generated at the connection number i = 1. First, the sequence data 1 with the sequence number j = 1 is transmitted (S21, S22). This sequence data transmission processing is performed according to the procedure shown in FIG. 3 and FIGS. 5 to 7. When sequence data transmission is completed (FIG. 3: S114), sequence data 1 to Mi until sequence number j = Mi is reached. Are sequentially transmitted (S23, S24, S25, S22). When the transmission of the last sequence data Mi is completed, the data in the latest data storage unit 12 is discarded (S24, S26), and the presence or absence of an old data request described in the connection response signal transmitted from the fixed terminal ( The parameter R) is confirmed (S27). If there is no old data request, the old data storage unit 13 is cleared (S41), the connection count i is incremented in S12, and the process returns to S13 data collection.

  Note that the processing of S41 is related to the processing of S81 to S83 of FIG. 9, and there is a situation in which there is old data in the mobile terminal and no old data request (R = 0) in the fixed terminal (when communication is interrupted in FIG. 6). ), Which will be described separately.

  On the other hand, in FIG. 8 and FIG. 11, when the mobile terminal repeats retransmission during transmission of the sequence data mi in S22 and the sequence data transmission is interrupted (FIG. 3: S117) (FIG. 11: time t15), the latest The data in the data storage unit 12 is moved (overwritten) to the old data storage unit 13 (S23, S28), the connection count i is incremented in S12, and the process returns to the data collection in S13.

  9 and 10, the fixed terminal receives the sequence data 1 with the sequence number j = 1 after the transmission of the connection response signal in S56 (S57, S58). This sequence data reception process is performed according to the procedure shown in FIG. 4 and FIGS. 5 to 7. When the sequence data reception is completed (FIG. 4: S209), the data in the sequence data storage unit is transferred to the latest data storage unit 21. The data is moved (added) (S59, S60), and the sequence data 1 to Mi are sequentially received until the sequence number j = Mi (S61, S62, S58). When reception of the last sequence data Mi is completed, the data in the latest data storage unit 21 is collected into one file and moved to the reception data storage unit 22 (S63). R = 0 is set (S64). If there is no old data due to the presence / absence of old data in the mobile terminal confirmed in S54, the process waits for a time Tg and returns to beacon transmission (S65, S66, S52). The time Tg is a guard time from the end of sequence data reception to the start of beacon transmission. The mobile terminal receives a beacon after completion of sequence data transmission and before exiting from the wireless communication range of the fixed terminal, and does not collect data. It is set for the purpose of preventing the connection operation from being performed.

  On the other hand, in FIG. 9 and FIG. 11, when the fixed terminal is interrupted in sequence data reception (FIG. 4: S213) in the reception process of the sequence data mi in S58 (FIG. 11: time t14), the latest data storage unit 21 Are moved (overwritten) to the old data storage unit 23 (S59, S68). Further, the parameter R = 1 indicating that the old data request is required next time is set (S69), the data division condition (Di, Ni, Mi) and the next transmission start sequence number mi are recorded (S70), and the beacon transmission of S52 is performed. Return to.

  The operation in the case where all the sequence data 1 to M1 are completed in sequence data transmission and sequence data reception in the connection frequency i = 1 in the sequence data transmission / reception procedure of the mobile terminal and fixed terminal shown above is shown in FIG. It corresponds to the time t11 to t12, t21. Further, the operation in the case of interruption of sequence data transmission and reception of sequence data during transmission / reception of any sequence data corresponds to time t11 to t15 in FIG. The operation in which communication is interrupted at time t13 in FIG. 11, the fixed terminal is interrupted in sequence data reception at time t14, and the mobile terminal is interrupted in sequence data transmission at time t15 is as shown in FIG.

(Retransmission example of old data 1)
In a situation where the fixed terminal is interrupted to receive sequence data at time t14 shown in FIG. 11 and the mobile terminal is interrupted to transmit sequence data at time t15, the mobile terminal has once left the wireless communication area of the fixed terminal. After receiving the beacon sent by the fixed terminal at the time t21, the latest data collected while the mobile terminal is out of the wireless communication range (t15 to t21) is transmitted, and then the old data Is retransmitted.

  Retransmission example 1 of old data in the mobile terminal and the fixed terminal after time t21 in FIG. 11 is shown in FIGS. FIG. 12 shows an example in which the latest data transmission / reception is completed and the old data transmission / reception is subsequently completed. FIG. 13 shows an example in which the latest data transmission / reception is terminated and the subsequent old data transmission / reception is interrupted.

  In FIG. 8, FIG. 11 and FIG. 12, when the sequence transmission is interrupted at time t15 during the transmission of m1 among the sequence data 1 to M1, the mobile terminal updates the collected data at times t0 to t11 as the latest data. New data is collected from time t15 to t21 from the storage unit 12 to the old data storage unit 13 until the next beacon is received, and the collected data is stored in the collection data storage unit 11 (S28, S12). , S13, S14). If a beacon is received at time t21, data collected during time t15 to t21 is transmitted in the procedure from S15 to S25. Here, when the number of transmissions i = 2, the transmission of the sequence data 1 to M2 is completed, and if it is confirmed in S18 and S27 that the connection response signal of the fixed terminal indicates “old data requested”, the time is within the time Tdreq. Waiting for the reception of the old data request signal transmitted from the fixed terminal (S29, S30, S31). If the old data request signal is not received and the time is over, the old data in the old data storage unit 13 is discarded (S30, S39), the connection count i is incremented in S12, and the process returns to the data collection in S13.

  When the old data request signal is received (FIG. 12: t22), the old data division condition (D (i-1), N (i-1), M (i-1)) included in the old data request signal The transmission start sequence number m (i-1) is confirmed (S32), the old data stored in the old data storage unit 13 is divided into fragments according to the data division conditions, and sequence data is generated (S33). . Next, the sequence data m (i-1) with sequence number j = m (i-1) is transmitted (S34, S35). This sequence data transmission processing is performed according to the procedure shown in FIG. 3 and FIGS. 5 to 7. When the sequence data transmission is completed (FIG. 3: S114), until the sequence number j = M (i−1). Sequence data m (i-1) to M (i-1) are sequentially transmitted (S36, S37, S38, S35). When transmission of the last sequence data M (i-1) is completed (FIG. 12: t26), the old data in the old data storage unit 13 is discarded (S37, S39), and the connection count i is incremented in S12. Then, the process returns to S13 data collection.

  On the other hand, in FIG. 8 and FIG. 13, when the mobile terminal repeats retransmission during transmission of the sequence data m2 in S35 and the sequence data transmission is interrupted (FIG. 3: S117) (FIG. 13: t29), the old data The old data in the storage unit 13 is discarded (S36, S39), the connection count i is incremented in S12, and the process returns to the data collection in S13.

  In FIG. 9, FIG. 11 and FIG. 12, if the sequence reception is interrupted at time t14 during the reception of m1 among the sequence data 1 to M1, the fixed terminal stores the latest received sequence data. The data is moved from the unit 21 to the old data storage unit 23 (S68). Next time, the parameter R = 1 indicating that the old data request is required is set (S69), and the data division condition (D (1), N (1), M ( 1)) and the next transmission start sequence number m (1) are recorded (S70), and the process returns to the beacon transmission of S52. And the connection request signal with respect to a beacon is received, and sequence data is received in the procedure from S53 to S62. Here, when the number of transmissions i = 2, the reception of the sequence data 1 to M2 is completed, and if it is confirmed in S54 and S65 that the connection request signal of the mobile terminal indicates “old data exists”, the old data request signal is Transmit (S71). The old data request signal includes the old data division condition (D (i-1), N (i-1), M (i-1)) and the transmission start sequence number m (i-1) recorded in S70. be written.

  After transmitting the old data request signal, the fixed terminal receives the sequence data m (i-1) (S72, S73). The sequence data reception process is performed according to the procedure shown in FIG. 4 and FIGS. 5 to 7. When the sequence data reception is completed (FIG. 4: S209), the data in the sequence data storage unit is transferred to the old data storage unit 23. Move (add) (S74, S75) and sequentially receive sequence data m (i-1) to M (i-1) until sequence number j = M (i-1) (S76, S77, S73) . When reception of the last sequence data M (i-1) is completed (FIG. 12: t26), the data in the old data storage unit 23 are combined into one file and moved to the reception data storage unit 22 (S78). ). Then, it waits for a predetermined time Tg and returns to beacon transmission (S66, S52).

  On the other hand, in FIG. 9 and FIG. 13, when the fixed terminal has interrupted the sequence data reception (FIG. 4: S213) in the process of receiving the sequence data m2 in S73 (FIG. 4: S213), the old data storage unit 23 The old data is discarded (S74, S79), and the process returns to the beacon transmission of S52.

(Retransmission example of old data 2)
FIG. 14 shows a second example of retransmission of old data in the mobile terminal and the fixed terminal after time t21 in FIG. Here, an example is shown in which the latest data transmission / reception is interrupted before the old data is transmitted / received.

  In FIG. 8, FIG. 11 and FIG. 14, if the sequence transmission is interrupted at time t15 during the transmission of m1 among the sequence data 1 to M1, the mobile terminal updates the collected data at time t0 to t11. New data is collected from time t15 to t21 from the storage unit 12 to the old data storage unit 13 until the next beacon is received, and the collected data is stored in the collection data storage unit 11 (S28, S12). , S13, S14). If a beacon is received at time t21, data collected during time t15 to t21 is transmitted in the procedure from S15 to S25. Here, when the number of transmissions i = 2, the sequence data 1 to M2 are transmitted, but the communication is interrupted during the transmission of the sequence data m2, and the retransmission is repeated and the sequence data transmission is interrupted (FIG. 3: S117). (FIG. 14: t25), the data in the latest data storage unit 12 is moved (overwritten) to the old data storage unit 13 (S23, S28), the connection count i is incremented in S12, and the process returns to the data collection in S13. At this time, the collected data at times t0 to t11 stored in the old data storage unit 13 is overwritten by the collected data at times t15 to t21 and disappears.

  In FIG. 9, FIG. 11 and FIG. 14, if the sequence reception is interrupted at time t14 during the reception of m1 among the sequence data 1 to M1, the fixed terminal stores the latest received sequence data. The data is moved from the unit 21 to the old data storage unit 23, the parameter R = 1 indicating that the old data request is required is set next time (S69), the data division condition (D1, N1, M1) and the next transmission start sequence number m1 are set. Record (S70) and return to beacon transmission in S52. And the connection request signal with respect to a beacon is received, and sequence data is received in the procedure from S53 to S62. Here, when the number of transmissions i = 2, the communication is interrupted while receiving the sequence data 1 to m2, and the transmission of the data response signal in which “there is an unreceived fragment” is repeated to interrupt the reception of the sequence data (FIG. 4: S213). If it becomes (FIG. 14: t24), the data in the latest data storage unit 22 is moved (overwritten) to the old data storage unit 23 (S59, S68), and the process returns to the beacon transmission of S52 via S69, S70. . At this time, the received data of time t0 to t11 stored in the old data storage unit 23 is overwritten by the data of time t15 to t21 and disappears.

  Therefore, when the mobile terminal and the fixed terminal are next connected (i = 3), the old data (i = 2) corresponding to the time t15 to t21 stored in the old data storage unit 23 after the latest data is transmitted / received. ) Is retransmitted.

(Retransmission example of old data 3)
FIG. 15 shows an example 3 of retransmission of old data. Here, although the transmission / reception of the last sequence data M1 is completed at the connection count i = 1, the old data in the case where the data response signal describing “all fragments received” transmitted by the fixed terminal is not received by the mobile terminal is shown. An example of retransmission processing is shown.

  In FIG. 8 and FIG. 15, when the mobile terminal does not receive a data response signal after transmission of the last sequence data M1 of the sequence data 1 to M1, and repeats retransmission, the mobile terminal stops the sequence transmission. The collected data of t11 are moved from the latest data storage unit 12 to the old data storage unit 13 (S23, S28). Then, new data is collected at time t15 to t21 until the next beacon is received, and the collected data is stored in the collected data storage unit 11 (S13, S14). When a beacon is received at time t21, a connection request signal describing “with old data” and the data division condition (D2, N2, M2) of the collected data is transmitted.

  On the other hand, in FIG. 9 and FIG. 15, after receiving the last sequence data M1 of the sequence data 1 to M1, the fixed terminal transmits a data response signal in which “all fragments have been received”, and the next old data request is unnecessary. Is set (S61, S63, S64), and beacon transmission is started after time Tg (S65, S66, S52). When a connection request signal transmitted from the mobile terminal is received for this beacon, a connection response signal describing a parameter R = 0 indicating that the old data request is unnecessary is transmitted.

  The mobile terminal receives the connection response signal describing the parameter R = 0 indicating that the old data request is not required from the fixed terminal, and transmits the sequence data 1 to M2. When a data response signal of “all fragments received” is received after transmission of the last sequence data M2 (FIG. 15: t22), the connection response signal has R = 0 indicating that the old data request is unnecessary. In S27 to S41, the old data in the old data storage unit 13 is discarded, and new data is collected in the time t22 to t31 until the next beacon is received.

  When the fixed terminal receives the connection request signal “with old data” from the mobile terminal, a mismatch with the parameter R = 0 indicating that the old data request is not required occurs. In S81 to S83 of FIG. 9, when the connection request signal has “old data” and R = 1, it is “old data” as it is, and when R = 0, it is changed to “no old data”. Process. That is, when the connection request signal “with old data” is received after time t21, but all of the sequence data 1 to M1 have already been received and the old data request is unnecessary (R = 0), The information from the mobile terminal is changed to “no old data”, and after receiving the sequence data 1 to M2, the process does not shift from S65 to S71 but starts transmitting a beacon (S65, S66, S52). At this time, the data of time t15 to t21 is further stored in the reception data storage unit 22 in which data of time t0 to t11 is stored.

(Second Embodiment)
FIG. 16 shows the processing procedure of the mobile terminal according to the second embodiment of the data retransmission method of the present invention. FIG. 17 shows a processing procedure of the fixed terminal according to the second embodiment of the data retransmission method of the present invention. FIG. 18 shows an example of transmission / reception control of old data in the first embodiment. FIG. 19 shows an example of transmission / reception control of old data in the second embodiment.

  The present embodiment and the first embodiment are different in the control procedure for transmitting / receiving old data. First, the old data transmission / reception control procedure in the first embodiment is organized with reference to FIG. 18 is an excerpt of the transmission / reception example shown in FIG.

  In the first embodiment, as shown in FIG. 8, FIG. 9, and FIG. 18, when the mobile terminal detects the interruption of sequence data transmission (S23, FIG. 18: t15), the data in the latest data storage unit 12 is deleted. The data storage unit 13 is moved (S28). On the other hand, when the fixed terminal detects interruption of sequence data reception (S59, FIG. 18: t14), the data in the latest data storage unit 21 is moved to the old data storage unit 23 (S68), and the parameter R = 1 is set. (S69) The data division condition (Di, Ni, Mi) and the next transmission start sequence number mi are recorded (S70). Then, after the transmission / reception of the latest data is completed (S27, S65, FIG. 18: t21 to t22), the old data request signal is transmitted from the fixed terminal (S71), and the mobile terminal receives the old data request signal (S29 to S31). ), Confirm old data division condition (D (i-1), N (i-1), M (i-1)) and transmission start sequence number m (i-1) (S32), and send / receive old data (S33 to S39, S72 to S78).

  In the second embodiment, as shown in FIG. 16, FIG. 17, and FIG. 19, when the mobile terminal detects the interruption of sequence data transmission (S23, FIG. 19: t15), the data in the latest data storage unit 12 is deleted. It moves to the data storage unit 13 (S28), and further records the data division condition (Di, Ni, Mi) and the next transmission start sequence number mi (S42). On the other hand, when the fixed terminal detects interruption of sequence data reception (S59, FIG. 19: t14), the data in the latest data storage unit 21 is moved to the old data storage unit 23 (S68), and the parameter R = 1 is set. Only (S69). After the transmission / reception of the latest data is completed (S27, S65, FIG. 19: t21 to t22), the mobile terminal uses the old data division condition (D (i-1), N (i-1), M (i-1)). And an old data transmission start signal describing the transmission start sequence number m (i-1) is transmitted (S43). On the other hand, the fixed terminal receives the old data transmission start signal within the time Ts (S91, S92, S93), and the old data division condition (D (i-1), N (i-1), M (i-1). )) And the transmission start sequence number m (i-1) are confirmed (S94), and an old data transmission start response signal is returned (S95). The mobile terminal receives the old data transmission start response signal within the time Tsres after the transmission of the old data transmission start signal (S44, S45, S46), and performs transmission / reception of the old data (S33 to S39, S72 to S78). That is, information related to transmission / reception of old data (old data division conditions (D (i-1), N (i-1), M (i-1)) and transmission start sequence number m (i-1)) is moved. The terminal is transmitted from the terminal to the fixed terminal, and the mobile terminal and the fixed terminal perform transmission / reception processing of old data accordingly.

  In the mobile terminal, when the old data transmission start response signal is not received within the time Tsres after transmitting the old data transmission start signal, the connection with the fixed terminal is interrupted. The old data 13 is discarded (S45, S39), the connection count i is incremented in S12, and the process returns to the data collection in S13. Further, in the fixed terminal, when the old data transmission start signal is not received within the time Ts after the reception of the latest data is completed, the connection with the mobile terminal is interrupted. The data is discarded (S92, S79), and the process returns to the beacon transmission of S52.

(Third embodiment)
FIG. 20 shows a processing procedure of the mobile terminal according to the third embodiment of the data retransmission method of the present invention. FIG. 21 shows a processing procedure of the fixed terminal according to the third embodiment of the data retransmission method of the present invention. FIG. 22 shows an example of transmission / reception control of old data in the third embodiment.

  The present embodiment, the first embodiment, and the second embodiment are different in the control procedure for transmitting / receiving old data, and the old data transmission / reception control procedure in the first embodiment and the second embodiment is as follows. As shown in FIG. 18 and FIG.

  In the third embodiment, as shown in FIG. 20, FIG. 21, and FIG. 22, when the mobile terminal detects the interruption of sequence data transmission (S23, FIG. 22: t15), the data in the latest data storage unit 12 is changed to the old data. The data storage unit 13 is moved (S28), and only the data division condition (Di, Ni, Mi) is recorded (S42 '). On the other hand, when the fixed terminal detects interruption of sequence data reception (S59, FIG. 19: t14), the data in the latest data storage unit 21 is moved to the old data storage unit 23 (S68), and the parameter R = 1 is set. (S69) Further, the next transmission start sequence number mi is recorded (S70 '). Then, if there is an old data request, the transmission start sequence number m (i-1) is added to the connection response signal for establishing a link with the mobile terminal (S56 ', FIG. 22: t21)). When receiving the connection response signal, the mobile terminal confirms the transmission start sequence number m (i-1) if there is an old data request (S18, S47). Thereafter, the latest data transmission / reception process is performed between the mobile terminal and the fixed terminal (S19 to S26, S57 to S64).

  After completion of transmission / reception of the latest data (S27, S65, FIG. 22: t22), the mobile terminal uses the old data including the old data division condition (D (i-1), N (i-1), M (i-1)). A transmission start signal is transmitted (S43 '). The fixed terminal receives the old data transmission start signal within the time Ts (S91, S92, S93) and changes the old data division condition (D (i-1), N (i-1), M (i-1)). Confirmation (S94 ') and return an old data transmission start response signal (S95). The mobile terminal receives the old data transmission start response signal within the time Tsres after the transmission of the old data transmission start signal (S44, S45, S46), and performs transmission / reception of the old data (S33 to S39, S72 to S78). That is, information related to transmission / reception of old data (old data division conditions (D (i-1), N (i-1), M (i-1)) and transmission start sequence number m (i-1)) is moved. This is characterized in that the data is transmitted between the terminal and the fixed terminal, and the mobile terminal and the fixed terminal perform transmission / reception processing of the old data accordingly.

  In the mobile terminal, when the old data transmission start response signal is not received within the time Tsres after transmitting the old data transmission start signal, the connection with the fixed terminal is interrupted. The old data 13 is discarded (S45, S39), the connection count i is incremented in S12, and the process returns to the data collection in S13. Further, in the fixed terminal, when the old data transmission start signal is not received within the time Ts after the reception of the latest data is completed, the connection with the mobile terminal is interrupted. The data is discarded (S92, S79), and the process returns to the beacon transmission of S52.

(Fourth embodiment)
FIG. 23 shows a processing procedure of the mobile terminal according to the fourth embodiment of the data retransmission method of the present invention. FIG. 24 shows the processing procedure of the fixed terminal according to the fourth embodiment of the data retransmission method of the present invention.

  This embodiment relates to processing in the first embodiment when a mobile terminal enters a wireless communication area of a fixed terminal without receiving collected data, receives a beacon, and establishes communication with the fixed terminal. In addition, although the example applied to 1st Embodiment is shown here, it is applicable similarly in 2nd Embodiment and 3rd Embodiment.

  In FIG. 23, when the mobile terminal receives the connection response signal for the connection request signal and establishes a link with the fixed terminal (S18), whether or not the fragment size Di of the data division condition calculated in S15 is zero. (Dummy data) is determined (S48), and in the case of 0, the process proceeds according to the presence or absence of the old data request notified from the fixed terminal by the connection response signal (S27). That is, when there is collected data, the transmission process is performed (S19 to S26), and when there is no collected data, the transmission process is passed.

  In FIG. 24, after receiving the connection request signal and confirming the data division condition in the mobile terminal, the fixed terminal determines whether the fragment size Di is 0 (whether it is dummy data) (S97), If it is 0, the next parameter R = 0 is set (S64), and the process proceeds according to the presence / absence of old data notified from the mobile terminal by the connection request signal (S65). That is, when there is collected data in the mobile terminal, the reception process is performed (S55 to S63), and when there is no collection data, the reception process is passed.

(Configuration example of mobile terminal)
FIG. 25 shows a configuration example of a mobile terminal. In the figure, the mobile terminal includes a radio unit 31, a signal processing hardware unit 32, a signal processing software unit 33, a memory unit 34, a data collection unit 35, a display unit 36, and an operation unit 37.

  The radio unit 31 receives radio waves, converts them into received radio signals, and outputs them to the signal processing hardware unit 32. The radio unit 31 converts a transmission radio signal input from the signal processing hardware unit 32 into a radio wave and transmits the radio radio wave.

  The signal processing hardware unit 32 manages wireless signals to be transmitted and received and performs wireless communication control (such as wireless communication state transition determination). In addition, radio control signal processing is performed on received radio control signals (beacons, connection response signals, data response signals, etc.) among the received radio signals input from the radio unit 31. A transmission radio control signal (connection request signal or the like) generated by the radio control signal is output to the radio unit 31 as a transmission radio signal. In addition, a sequence data storage unit 15 is provided for inputting one sequence data from the signal processing software unit 33 and temporarily storing the sequence transmission from the start of sequence transmission to the completion of sequence transmission. Processes are performed and output to the radio unit 31 as a transmission radio signal. In addition, it manages a fragment table provided when transmission / reception and retransmission processing are performed in units of fragments.

  The signal processing software unit 33 includes the latest data storage unit 12 that stores the latest data moved from the collected data storage unit 11 of the memory 34 when the link with the fixed terminal is established, and the old data storage unit that stores data that could not be transmitted in the previous communication. A data storage unit 13 is provided. After the link is established, the latest data or the old data is divided into a plurality of fragments and output to the signal processing hardware unit 32 as sequence data. In addition, various application functions are realized.

  The memory unit 34 includes a collected data storage unit 11 that stores data collected immediately before link establishment with a fixed terminal, and a backup data storage unit 14 that records all data after the apparatus is activated. The collected data storage unit 11 is cleared when the collected data is moved to the latest data storage unit 12 of the signal processing software unit 33 when the link with the fixed terminal is established. The backup data storage unit 14 is provided so that data that has failed to be transmitted and received can be read as necessary. Also, the ID of the mobile terminal and the ID of the fixed terminal that can be connected are recorded.

  The data collection unit 35 is a sensor function unit that collects data and outputs the collected data to the memory unit 34. The display unit 36 is a display or the like used when the user performs setting or operation of the device. The operation unit 37 is a keyboard or the like used when the user performs setting and operation of the apparatus.

(Example of fixed terminal configuration)
FIG. 26 shows a configuration example of a fixed terminal. In the figure, the fixed terminal includes a radio unit 41, a signal processing hardware unit 42, a signal processing software unit 43, a memory unit 44, a display unit 45, and an operation unit 46.

  The radio unit 41 receives radio waves, converts them into received radio signals, and outputs them to the signal processing hardware unit 42. Further, the wireless unit 41 converts the transmission wireless signal input from the signal processing hardware unit 42 into a wireless radio wave and transmits it.

  The signal processing hardware unit 42 manages wireless signals to be transmitted and received and performs wireless communication control (such as wireless communication state transition determination). In addition, radio control signal processing is performed on a received radio control signal (such as a connection request signal) among the received radio signals input from the radio unit 41. A transmission radio control signal (a beacon, a connection response signal, a data response signal, etc.) generated by the radio control signal is output to the radio unit 41 as a transmission radio signal. In addition, a sequence data storage unit 24 is provided that performs radio data signal processing on a received data signal among received radio signals input from the radio unit 41, performs reception determination, and stores data that can be received correctly. Is output to the latest data storage unit 21 of the signal processing software unit 43. In addition, it manages a fragment table provided when transmission / reception and retransmission processing are performed in units of fragments.

  The signal processing software unit 43 includes a latest data storage unit 21 and an old data storage unit 23 that store the latest data that is input one sequence at a time from the sequence data storage unit 24 of the signal processing hardware unit 42. When reception is completed, the data is reconstructed and output to the reception data storage unit 22 of the memory unit 44 as reception data. In addition, various application functions are realized.

  The memory unit 44 stores reception data input from the signal processing software unit 33. In addition, the ID of the fixed terminal and the ID of the connectable mobile terminal are recorded.

  The display unit 45 is a display or the like used when the user performs setting or operation of the device. The operation unit 46 is a keyboard or the like used when a user performs setting and operation of the apparatus.

The figure which shows the structural example of the radio | wireless communications system assumed by this invention. The figure explaining the division method of the collection data used for the data retransmission method of this invention. The flowchart which shows the sequence data transmission procedure of a mobile terminal. The flowchart which shows the sequence data transmission procedure of a fixed terminal. The time chart which shows the transmission / reception example (when there is no resending) of sequence data. The time chart which shows the example of transmission / reception of sequence data (when there exists resending). The time chart which shows the example of transmission / reception of sequence data (when restricting the frequency | count of resending). The flowchart which shows the process sequence of the mobile terminal in 1st Embodiment of the data retransmission method of this invention. The flowchart which shows the process sequence of the fixed terminal in 1st Embodiment of the data resending method of this invention. The time chart which shows the transmission / reception example (no old data, the newest data end) of 1st Embodiment. The time chart which shows the transmission / reception example (no old data, the latest data interruption) of 1st Embodiment. The time chart which shows the transmission / reception example (there is old data, the newest data end, the old data end) of 1st Embodiment. The time chart which shows the transmission / reception example (there is old data, the latest data end, old data interruption) of 1st Embodiment. The time chart which shows the transmission / reception example (there is old data and the newest data interruption) of 1st Embodiment. The time chart which shows the transmission / reception example (no data response signal of the newest data last) of 1st Embodiment. The flowchart which shows the process sequence of the mobile terminal in 2nd Embodiment of the data retransmission method of this invention. The flowchart which shows the process sequence of the fixed terminal in 2nd Embodiment of the data retransmission method of this invention. The time chart which shows the transmission / reception control example of the old data in 1st Embodiment. The time chart which shows the example of transmission / reception control of the old data in 2nd Embodiment. The flowchart which shows the process sequence of the mobile terminal in 3rd Embodiment of the data retransmission method of this invention. The flowchart which shows the process sequence of the fixed terminal in 3rd Embodiment of the data retransmission method of this invention. The time chart which shows the transmission / reception control example of the old data in 1st Embodiment. The flowchart which shows the process sequence of the mobile terminal in 4th Embodiment of the data retransmission method of this invention. The flowchart which shows the process sequence of the fixed terminal in 4th Embodiment of the data retransmission method of this invention. The figure which shows the structural example of a mobile terminal. The figure which shows the structural example of a fixed terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mobile terminal 11 Collected data storage part 12 Latest data storage part 13 Old data storage part 14 Backup data storage part 15 Sequence data storage part 20 Fixed terminal 21 Latest data storage part 22 Received data storage part 23 Old data storage part 24 Sequence data Storage unit 31, 41 Radio unit 32, 42 Signal processing hardware unit 33, 43 Signal processing software unit 34, 44 Memory unit 35 Data collection unit 36, 45 Display unit 37, 46 Operation unit

Claims (12)

A fixed terminal forming a wireless communication area;
Enter and exit the wireless communication area of the fixed terminal, collect data when a link is not established with the fixed terminal, and transmit collected data to the fixed terminal when a link is established with the fixed terminal within the wireless communication area In a wireless communication system comprising:
The mobile terminal stores the collected data as old data and then enters the wireless communication area when communication with the fixed terminal is interrupted by leaving the wireless communication area before finishing transmission of the collected data. When the link is established with the fixed terminal, the latest collected data accumulated so far is first transmitted, and then the old data not yet transmitted is executed,
When the communication with the mobile terminal is interrupted before finishing the reception of the collected data, the fixed terminal stores the received data so far as old data, and then establishes a link with the mobile terminal, A method of retransmitting data in a wireless communication system, comprising: first receiving the latest collected data and then receiving the old data transmitted from the mobile terminal. The data retransmission method of the wireless communication system according to claim 1,
When the mobile terminal does not receive the data response signal transmitted from the fixed terminal within a predetermined time Tack after transmission of the collected data, the mobile terminal retransmits the collected data, and the number of retransmissions reaches a specified value. In this case, the collected data is not retransmitted, and it is determined that communication with the fixed terminal is interrupted. The data re-transmission method of the wireless communication system according to claim 1,
The fixed terminal transmits a data response signal notifying the reception state of the collected data, and the data response signal when the number of transmissions of the data response signal indicating that the collected data cannot be received normally reaches a specified value. It is determined that communication with the mobile terminal has been interrupted without transmitting the data. The data retransmission method of the wireless communication system according to claim 1,
The mobile terminal divides the collected data into one or a plurality of fragments, generates one or a plurality of sequence data in which a predetermined number of fragments are collected, calculates the data division condition, and links to the fixed terminal At the time of establishment, send a connection request signal including this data division condition,
The fixed terminal confirms the data division condition by receiving the connection request signal and transmits a connection response signal.
The mobile terminal and the fixed terminal perform transmission / reception of the collected data and transmission / reception of old data incompletely transmitted / received in units of the sequence data after transmission / reception of the connection request signal and the connection response signal. A data retransmission method for a communication system. The data re-transmission method of the wireless communication system according to claim 4,
When the communication with the mobile terminal is interrupted, the fixed terminal records the data division condition of the collected data being received and the next transmission start sequence number, and then establishes a link with the mobile terminal and updates the latest After receiving the collected data, send the old data request signal including the data division condition and the next transmission start sequence number,
The mobile terminal confirms the data division condition and the next transmission start sequence number by receiving the old data request signal,
The fixed terminal and the mobile terminal transmit / receive sequence data that has not been transmitted / received among the old data based on a data division condition obtained in response to transmission / reception of the old data request signal and a next transmission start sequence number. A method for retransmitting data in a wireless communication system. The data re-transmission method of the wireless communication system according to claim 4,
When the communication with the fixed terminal is interrupted, the mobile terminal records the data division condition of the collected data being transmitted and the next transmission start sequence number, and then establishes a link with the fixed terminal and updates the latest After sending the collected data, send the old data transmission start signal including the data division condition and the next transmission start sequence number,
The fixed terminal confirms a data division condition and a next transmission start sequence number by receiving the old data transmission start signal, transmits a corresponding old data transmission start response signal,
The mobile terminal and the fixed terminal transmit / receive out of the old data based on a data division condition and a next transmission start sequence number obtained in response to transmission / reception of the old data transmission start signal and the old data transmission start response signal. A method for retransmitting data in a wireless communication system, comprising transmitting and receiving completion sequence data. The data re-transmission method of the wireless communication system according to claim 4,
When the communication with the mobile terminal is interrupted, the fixed terminal records the next transmission start sequence number of the collected data being received, and then transmits from the mobile terminal when establishing a link with the mobile terminal. A connection response signal including the next transmission start sequence number in response to the received connection request signal,
The mobile terminal records a data division condition of collected data being transmitted when communication with the fixed terminal is interrupted, and then receives the connection response signal when establishing a link with the fixed terminal. After confirming the next transmission start sequence number, after sending the latest collected data, send the old data transmission start signal including the data division condition,
The fixed terminal confirms a data division condition by receiving the old data transmission start signal, transmits a corresponding old data transmission start response signal,
The mobile terminal and the fixed terminal transmit / receive out of the old data based on a data division condition and a next transmission start sequence number obtained in response to transmission / reception of the old data transmission start signal and the old data transmission start response signal. A method for retransmitting data in a wireless communication system, comprising transmitting and receiving completion sequence data. The data re-transmission method of the wireless communication system according to claim 4,
The mobile terminal and the fixed terminal omit transmission / reception processing of the latest collection data when the mobile terminal does not have the latest collection data, and perform processing according to the presence / absence of old data that has not been transmitted. For retransmitting data in a wireless communication system. A fixed terminal forming a wireless communication area;
Enter and exit the wireless communication area of the fixed terminal, collect data when a link is not established with the fixed terminal, and transmit collected data to the fixed terminal when a link is established with the fixed terminal within the wireless communication area In a wireless communication system comprising:
When communication with the fixed terminal is interrupted by leaving the wireless communication area before transmission of the collected data is completed, the collected data is stored as old data, and then enters the wireless communication area and enters the fixed terminal. A mobile terminal of a wireless communication system, comprising means for transmitting the latest collected data accumulated so far when a link is established, and then transmitting old data that has not been transmitted. In the mobile terminal of the wireless communication system according to claim 9,
The collected data is divided into one or a plurality of fragments, and further, one or a plurality of sequence data in which a predetermined number of fragments are collected is generated, and the data division condition is calculated, and this is established when establishing a link with the fixed terminal. Means for transmitting a connection request signal including data division conditions;
Means for performing transmission of the collected data and transmission of uncompleted old data in units of the sequence data after reception of a connection response signal from the fixed terminal in response to the connection request signal. A mobile terminal of a communication system. A fixed terminal forming a wireless communication area;
Enter and exit the wireless communication area of the fixed terminal, collect data when a link is not established with the fixed terminal, and transmit collected data to the fixed terminal when a link is established with the fixed terminal within the wireless communication area In a wireless communication system comprising:
When communication with the mobile terminal is interrupted before the collection data is received, the received data up to that point is stored as old data, and when the link is established with the mobile terminal, the latest collected data is first stored. A fixed terminal of a wireless communication system, comprising: means for receiving old data that has not been transmitted before and is transmitted from the mobile terminal. The fixed terminal of the wireless communication system according to claim 11,
The mobile terminal divides the collected data into one or a plurality of fragments, and further includes a connection request signal including a data division condition indicating that one or a plurality of sequence data in which a predetermined number of fragments are collected is generated with the mobile terminal. Means for receiving the data when the link is established, checking the data division condition, and transmitting a corresponding connection response signal;
Means for receiving the collected data and receiving uncompleted old data in units of the sequence data after transmission / reception of the connection request signal and the connection response signal. Terminal.

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