KR100690845B1 - A method for efficiently transmitting and receiving data in a mobile communication network supporting the TC / IP protocol - Google Patents

Abstract

The present invention relates to a TCP / IP capable mobile terminal capable of transmitting data efficiently. The mobile terminal according to the present invention is characterized by including a transceiver, a buffer, a memory, a processor capable of reading a reduced TCP header, and a TCP header information mapping table. On the other hand, the transmission method according to the present invention includes receiving a command to use a reduced TCP header, setting a reduced TCP header unit according to the command, and transmitting data using the set header; It features. In addition, the reception method according to the invention is characterized in that it comprises the step of receiving data, and if the TCP header in the received data is a reduced TCP header, identifying the reduced TCP header information. Therefore, according to the present invention, in the mobile communication network supporting TCP / IP, there is an effect that can reduce the overhead unlike the conventional. Therefore, it is possible to maximize the use of radio resources more.

Description

{A METHOD AND A MOBILE TERMINAL FOR EFFICIENTLY TRANSMITTING / RECEIVING DATA BY CONVERTING TCP HEADER INFORMATION AT MOBILE NETWORK SUPPORTING TCP / IP PROTOCOL}

1 is a block diagram showing a conventional TCP header portion.

2 is a diagram illustrating a reduced TCP header unit according to an embodiment of the present invention.

3 is a mapping table between a reduced TCP header portion and a conventional TCP header portion according to an embodiment of the present invention.

4 is a simplified diagram illustrating the flow of data through a reduced TCP header according to an embodiment of the present invention.

5 illustrates a mobile terminal supporting a reduced TCP header according to an embodiment of the present invention.

6 illustrates a relay in a mobile communication network supporting a reduced TCP header according to an embodiment of the present invention.

7 illustrates a TCP header converter according to an embodiment of the present invention.

8 is a detailed block diagram of a TCP header converter according to an embodiment of the present invention.

9 illustrates an efficient data transmission method in a TCP / IP supported mobile communication network according to an embodiment of the present invention.

10 illustrates an efficient data reception method in a TCP / IP supported mobile communication network according to an embodiment of the present invention.

11 illustrates an efficient data relay method in a TCP / IP supported mobile communication network according to an embodiment of the present invention.

** Description of the major signs in the drawings **

500: mobile terminal 501: transceiver

502: Buffer 503: Processor

504: input unit 505: output unit

506: Memory 507: TCP Header Converting Controller

508: TCP Header Information Mapping Table

600: repeater 601: transceiver

602: Buffer 603: Processor

604: TCP Header Converting Controller 605: TCP Header Information Mapping Table

606: memory

800: TCP Header Converter 801: TCP Header Converting Controller

802: TCP Header Information Mapping Table 803: Memory

804: receiver 805: transmitter

The present invention relates to a mobile terminal, and more particularly, to a TCP / IP supported mobile terminal capable of transmitting data efficiently.

Since the second generation of communication, many service providers have sought to provide various mobile communication services to users. As part of such search, a mobile terminal supporting TCP / IP has been introduced to provide a service using an existing Internet network. However, the conventionally introduced mobile terminal has a problem such as overhead.

Hereinafter, a problem of a mobile terminal supporting TCP / IP will be described with reference to the drawings.

1 is a block diagram showing a conventional TCP header portion.

As can be seen from the figure, the header of the TCP protocol used in the conventional mobile terminal is defined in RFC793, and is basically proposed to be used for the wired Internet network. The conventional TCP protocol has a regular structure in order to satisfy compatibility with each server in an IP network, that is, the Internet. That is, 65536 ports for transmission and reception are defined, and a field for a 32-bit serial number is configured. More detailed description is as follows.

1.Source port number (16): Port number of sender

2. Destination port number (16): port number of receiver

3. Sequence number (32): Serial number of receiving packet

4. Acknowledge sequence number (32): Serial number of acknowledgment packet

5.Header length (4): length of TCP header

6.Reserved (6)

7. Flag (6): Flag's characteristic definition flag

8.Window size (16): Receivable window (buffer) size

9. Checksum (16): checksum for error control

10. Urgent pointer (16): Offset of urgent packet transmitted when URG flag is used.

As listed above, the TCP header consists of a total of 20 bytes including each information element, and all packets transmitted from one end to the other end are transmitted including the headers listed above.

However, such a large header may not be needed in a mobile communication network. That is, the port number that can be designated as the port number is considerably larger than the type of service provided by the service provider of the mobile communication network. In addition, the amount of data transmitted and received through the mobile communication network is not so large compared to the number that can be designated as the serial number.

Therefore, the conventional TCP protocol structure as described above has a problem that can cause considerable overhead in a mobile communication network.

Accordingly, an object of the present invention is to provide a method and a mobile terminal for efficiently transmitting data in a mobile communication network supporting TCP / IP.

In order to achieve the above object, a mobile terminal according to the present invention includes a transceiver, a buffer, a memory, a processor capable of reading a reduced TCP header, and a TCP header information mapping table. In addition, the transmission method of the present invention for achieving the above object comprises the steps of receiving a command to use a reduced TCP header, setting the reduced TCP header unit according to the command, and using the set header Characterized in that it comprises the step of transmitting. In addition, the reception method of the present invention for achieving the above object includes the step of receiving data, and if the TCP header in the received data is a reduced TCP header, identifying the reduced TCP header information Characterized in that.

On the other hand, the relay device of the present invention for achieving the above object is characterized in that it comprises a transceiver, a buffer, a memory, a processor that can read the reduced TCP header, and a TCP header information mapping table . In addition, the relay method of the present invention for achieving the above object includes the steps of receiving data to be relayed, identifying TCP header information, and whether the received data should be relayed through a reduced TCP header; And a step of setting a reduced TCP header when the relaying is to be relayed to the reduced TCP header as a result of the determination, and transmitting data using the set reduced TCP header.

Hereinafter, with reference to the accompanying drawings an embodiment according to the present invention will be described in detail.

2 is a diagram illustrating a reduced TCP header unit according to an embodiment of the present invention.

As can be seen from FIG. 2, the TCP header unit according to the present invention has a total length of 11.2 bytes. Hereinafter, the TCP header according to the present invention will be described in more detail. As shown, the TCP header portion according to the present invention is:

1. Source port number: Port number of sender consisting of 8 bits

2. Destination port number: The port number of the destination consisting of 8 bits

3. Sequence number: Serial number of the received packet consisting of 16 bits.

4. Acknowledge sequence number: 16-bit acknowledgment serial number

5. Header length: Length of 4 bits TCP header

6. Reserved: Do not use

7. Flag: attribute definition flag of 6-bit packet

8. Window size: Receivable window (buffer) size consisting of 8 bits

9. Checksum: Checksum for 16-bit error control

10. Urgent pointer: URG flag consisting of 8 bits

Consists of

Comparing the TCP header according to the present invention and the conventional TCP header is as follows.

[Table 1]

Header information element Bit size of conventional TCP header Bit size of TCP header according to the present invention Source Port Number 16 8 Destination Port Number 16 8 Sequence Number 32 16 Acknowlege Seq. Number 32 16 Header Length 4 4 Reserved 6 0 Flag 6 6 Window size 16 8 Checksum 16 16 Urgent pointer 16 8 SUM 20 bytes 11.2 bytes

As described above, the TCP header unit according to the present invention is configured to minimize the above-described TCP header overhead, thereby maximizing radio resource utilization with minimum overhead in transmitting and receiving user data. Here, the serial number uses 16-bit length instead of the conventional 32-bit length, which means that there is no mixing of the sequence due to the short path (small hop) of the terminal and the relay period, and the 122-segment overlapping sequence between the terminals (44 segments when the MSS is 1460 when the MSS is 536.) Data can be transmitted and received normally. Therefore, even through this, it should be noted that data can be transmitted and received normally as in the prior art.

Also, in general, the TCP / IP header may be compressed and transmitted through a header compression algorithm, and the TCP header proposed by the present invention may be compressed and transmitted according to the compression algorithm. Details of the compression algorithm will not be described as this may obscure the subject matter of the present invention.

3 is a TCP header information mapping table between a reduced TCP header portion and a conventional TCP header portion according to an embodiment of the present invention.

As shown, the TCP header information mapping table is for mapping with conventional TCP header information when using the reduced TCP header according to the present invention as shown in FIG. If the conventional TCP port number is 21, the port number of the reduced TCP is 1, and if the conventional TCP number is 25, the port number of the reduced TCP is 3. This port number is applicable to both the source and destination port numbers.

Although not shown, the TCP header information mapping table may indicate an acknowledgment sequence number in addition to the port number described above.

4 is a simplified diagram illustrating the flow of data through a reduced TCP header according to an embodiment of the present invention.

Referring to FIG. 4, it can be seen that a mobile terminal according to the present invention transmits data using a reduced TCP header, and a repeater converts the reduced TCP header into a conventional TCP header. In more detail, the mobile terminal according to the present invention may determine which TCP header to use and set the TCP header according to the determination. Here, the determination may be determined using an IP address according to an embodiment of the present invention. That is, it may be determined depending on whether to use an IP subnet mask or a shortened IP header described in another application specification of the present inventor.

On the other hand, in the repeater that is the receiving end, if the TCP header in the received data is a reduced header, it may determine whether to convert it to a conventional TCP header, that is, the repeater uses an IP subnet mask, It may be determined whether or not to use the shortened IP header described in another application specification. That is, as shown in the figure, when the transmission is to the Internet using the conventional TCP header, the reduced TCP header is converted to the conventional TCP header and then relayed. It will be apparent to those skilled in the art that this series of processing procedures can be converted without delay in a conventional high speed process.

On the other hand, the data transmitted from the Internet to the mobile terminal is composed of a conventional TCP header, the repeater receives it and converts it to a reduced TCP header as described above and transmits it to the mobile terminal.

On the other hand, the repeater may transmit the data received from the Internet to the mobile terminal as it is without going through the TCP header converting as described above. In such a case, generally, a dial-up network service using a mobile terminal is provided. The corresponding TCP / IP layer device is a telephone-connected PC, not a repeater. In this case, the header converting process is not necessary.

5 illustrates a mobile terminal supporting a reduced TCP header according to an embodiment of the present invention.

As shown, the mobile terminal 500 according to the present invention is characterized in that it comprises a processor 503 that can read the reduced TCP header, and the TCP header information mapping table 508. In more detail, the mobile terminal 500 according to the present invention includes a transceiver 501, a buffer 502, a processor 503 capable of reading a reduced TCP header, an input unit 504, and an output unit ( 505, and a TCP header information mapping table 508.

Here, the reduced TCP header includes a reduced source port number and a reduced source destination port number. To this end, the TCP header information mapping table 508 may map between the unreduced port number and the reduced port number. In addition, the reduced TCP header may preferably further include a reduced sequence number. Also, preferably, the reduced TCP header may further include a reduced reception acknowledgment number. Further, more preferably, the reduced TCP header may include a reduced header length, a reduced window size, and a reduced urgent pointer.

Meanwhile, the mobile terminal 500 may further include a TCP header information converting controller 507 according to an embodiment of the present invention. The TCP header information converting controller 507 serves to convert between the conventional TCP header and the TCP according to the present invention.

The TCP header information mapping table 508 or the TCP header converting controller 507 described above may be a program that may be executed by the processor 503, and may be stored in the storage unit 506. In this case, the storage unit 506 may be a memory. Meanwhile, the TCP header information mapping table 508 or the TCP header converting controller 507 may be configured as an ASIC.

In the above, the mobile terminal according to the present invention has been described. Hereinafter, the relay device according to the present invention will be described.

6 illustrates a relay in a mobile communication network supporting a reduced TCP header according to an embodiment of the present invention.

As shown, the relay device 600 according to the present invention is characterized in that it comprises a processor 603 that can read the reduced TCP header, and the TCP header information mapping table 605. In more detail, the relay device 600 according to the present invention includes a transceiver 601, a buffer 602, a processor 603 capable of reading a reduced TCP header, and a TCP header information mapping table 605. It includes. Meanwhile, the relay device 600 may further include a TCP header converting controller 604 according to an embodiment of the present invention. Here, the TCP header information mapping table 605 and the TCP header converting controller 604 will not be described in detail as they are similar to those of the aforementioned mobile terminal. The TCP header information mapping table 605 or the TCP header converting controller 604 may be a program that may be executed by the processor 603 and may be stored in the storage unit 606. Here, the storage unit 606 may be preferably a memory. Meanwhile, the TCP header information mapping table 605 or the TCP header converting controller 604 may be configured as an ASIC (custom semiconductor).

7 illustrates a TCP header converter according to an embodiment of the present invention.

As shown, the TCP header converter according to the present invention can convert a conventional 20 byte TCP header into a reduced TCP header. This will be described in more detail with reference to FIG. 8.

8 is a detailed block diagram of a TCP header converter according to an embodiment of the present invention.

Referring to FIG. 8, a TCP header converter 800 is shown that includes a TCP header information converting controller 801 and a TCP header information mapping table 802. The converting controller 801 may be a processor configured as an ASIC, and the TCP header information mapping table 802 may be stored in the storage unit 803. Meanwhile, according to an embodiment of the present invention, the converter 800 including the converting controller 801 and the TCP header information mapping table 802 may be program codes or binary data, and may be a mobile terminal or communication. It can be stored in memory in the equipment.

In the above, the mobile terminal, the relay device, and the converter according to the present invention have been described. Hereinafter, a data transmission and reception method according to the present invention will be described.

9 illustrates an efficient data transmission method in a TCP / IP supported mobile communication network according to an embodiment of the present invention.

As shown in the drawing, it is first determined whether to use the reduced TCP header (S901). If the result of the determination is YES, after referring to the TCP port number mapping table (S902), the reduced TCP header is set (S903). However, if the result of the determination is "no", the conventional TCP header is set (S904). Subsequently, after attaching the set header to the segment (S904), the following procedure is performed (S906). Here, the determination (S901) may be determined by using a subnet mask calculation using an IP address or using a reduced IP header described in another application specification of the present inventors.

It should be noted that some of the processes of the present invention described above may be omitted and certain steps may include other steps.

10 illustrates an efficient data reception method in a TCP / IP supported mobile communication network according to an embodiment of the present invention.

As shown, after receiving data (S1001), it is determined whether the TCP header in the received data is a reduced TCP header (S1002). If the result of the determination is YES, after decapsulating the reduced TCP header (S1003), the TCP port number mapping table is referred to (S1004), and the TCP header information is identified (S1006). However, if the result of the determination is "no", after decapsulating the TCP header (S1005) as usual, the TCP header information is identified (S1006). Subsequently, the following procedure is performed (S1006).

It should be noted that some of the processes of the present invention described above may be omitted and certain steps may include other steps.

11 illustrates an efficient data relay method in a TCP / IP supported mobile communication network according to an embodiment of the present invention.

As shown, after receiving data (S1101), it is determined whether the TCP header in the received data is a reduced TCP header (S1102). If the result of the determination is YES, the encapsulated TCP header is decapsulated (S1103). After referring to the TCP port number mapping table (S1104), TCP header information is identified (S1106). However, if the result of the determination is "no", after decapsulating the TCP header (S1105) as usual, the TCP header information is identified (S1106). Subsequently, it is determined whether data relay should be reduced TCP (S1107). If the result of the determination (S1107) is YES, after referring to the TCP port number mapping table (S1108), the reduced TCP header is set (S1109). However, if the result of the determination (S1107) is "no", the TCP header is set as usual (S1111). Next, the data is relayed by the following procedure (S1111).

It should be noted that some of the processes of the present invention described above may be omitted and certain steps may include other steps.

 The method according to the invention described thus far can be implemented in software, hardware, or a combination thereof. For example, the method according to the present invention may be stored in a storage medium (eg, mobile terminal internal memory, flash memory, hard disk, etc.) and may be stored in a processor (eg, mobile terminal internal microprocessor). It may be implemented as codes or instructions in a software program that can be executed by.

In the above description of the preferred embodiments of the present invention by way of example, the scope of the present invention is not limited only to these specific embodiments, the present invention is in various forms within the scope of the spirit and claims of the present invention Can be modified, changed, or improved.

According to the present invention, in the mobile communication network supporting TCP / IP, there is an effect that can reduce the overhead unlike the conventional. Therefore, it is possible to maximize the use of radio resources more.

Claims (35)

In the data of the TCP layer corresponding to four layers of the Open Systems Interconnection (OSI) model, And a reduced header portion including a reduced source port number and a reduced destination port number. The method of claim 1, wherein the reduced header portion A computer-readable recording medium having a TCP segment recorded thereon, further comprising a reduced sequence number or a reduced received acknowledgment number. The method of claim 1, wherein the reduced header portion: A reduced window size unit; A computer-readable recording medium in which a TCP segment is recorded, further comprising a reduced urgent pointer portion. In a mobile terminal capable of supporting TCP / IP, A transceiver; A buffer; Memory; A TCP header information mapping table; And a processor capable of reading the reduced TCP header according to the TCP header information mapping table. The method of claim 4, wherein The reduced TCP header includes a reduced source port number and a reduced destination port number. The TCP header information mapping table may map between an unreduced port number and a reduced port number. 6. The method of claim 5, wherein the reduced TCP header is A reduced sequence number section; A reduced reception acknowledgment number section; A reduced window size unit; TCP / IP support mobile terminal further comprises a reduced emergency pointer (Urgent Pointer). The method of claim 4, wherein And a TCP header converting controller. The method of claim 7, wherein The TCP header information mapping table and the TCP header converting controller may be stored in the memory, The processor is capable of accessing the TCP header information mapping table and the converting controller stored in the memory. The method of claim 7, wherein The TCP header information mapping table and the TCP header converting controller may be configured as an ASIC (Custom Semiconductor). In the wireless network repeater that can support TCP / IP, A transceiver; A buffer; Memory; A TCP header information mapping table; And a processor capable of reading a reduced TCP header according to the TCP header information mapping table. The method of claim 10, The reduced TCP header includes a reduced source port number and a reduced destination port number. The TCP header information mapping table is a TCP / IP capable wireless network repeater that can map between the reduced port number and the reduced port number. 12. The method of claim 11, wherein the reduced TCP header is A reduced sequence number section; A reduced reception acknowledgment number section; A reduced window size unit; TCP / IP support wireless network repeater further comprises a reduced emergency pointer (Urgent Pointer). The method of claim 10, TCP / IP support wireless network repeater further comprises a TCP header converting controller. The method of claim 13, The TCP header information mapping table and the TCP header converting controller may be stored in the memory, And the processor can access the TCP header information mapping table and the converting controller stored in the memory. The method of claim 13, The TCP header information mapping table and the TCP header converting controller may be configured as an ASIC (Custom Semiconductor). An input unit; An output unit; A TCP header information table; And a TCP header converting controller for converting the reduced port number and the unreduced port number according to the TCP header information table. The method of claim 16, The TCP header information table includes mapping information between the reduced port number and the unreduced port number. A data transmission method in a mobile terminal supporting TCP / IP, Receiving a command to use a reduced TCP header; Setting a reduced TCP header portion according to the command; And transmitting data using the set header. The method of claim 18, The reduced TCP header unit includes a reduced source port number and a reduced destination port number, wherein the reduced TCP header unit includes a reduced source port number and a reduced destination port number. . 20. The system of claim 19, wherein the reduced TCP header is A reduced sequence number section; A reduced reception acknowledgment number section; A reduced window size unit; A method for efficiently transmitting data in a TCP / IP supported mobile terminal, further comprising a reduced urgent pointer unit. The method of claim 18, And referring to the TCP header information table according to the command, wherein the setting comprises setting a TCP header according to the reference step. Way. The method of claim 21, And the TCP header information table can map between the reduced port number and the unreduced port number. The method of claim 18, And receiving the reduced TCP header usage command by determining an IP address address. In the data receiving method in a mobile terminal supporting TCP / IP, Receiving data; And identifying the reduced TCP header information if the TCP header in the received data is a reduced TCP header. The method of claim 24, The reduced TCP header unit includes a reduced source port number and a reduced destination port number, wherein the reduced TCP header unit includes a reduced source port number and a reduced destination port number. . 27. The system of claim 25, wherein the reduced TCP header is A reduced sequence number section; A reduced reception acknowledgment number section; A reduced window size unit; A method for efficiently receiving data in a TCP / IP supported mobile terminal, further comprising a reduced urgent pointer unit. The method of claim 24, Referencing a TCP header information mapping table, the identifying step identifying according to the reference step. The method of claim 27, And the TCP header information mapping table can map between the reduced port number and the unreduced port number. In the method of data relay in a mobile communication network capable of supporting TCP / IP, Receiving data to be relayed; Identifying TCP header information; Determining whether the received data should be relayed through a reduced TCP header; Setting a reduced TCP header when it is necessary to relay to the reduced TCP header as a result of the determination; And transmitting the data using the set reduced TCP header. The method of claim 29, The reduced TCP header may include a reduced source port number and a reduced destination port number, wherein the reduced TCP header includes a reduced source port number and a reduced destination port number. 33. The system of claim 30, wherein the reduced TCP header is A reduced sequence number section; A reduced reception acknowledgment number section; A reduced window size unit; An efficient relay method for data in a TCP / IP supported mobile communication network, further comprising a reduced urgent pointer unit. 30. The method of claim 29, wherein identifying the TCP header information is Determining whether the TCP header in the received data is a reduced TCP header, wherein if the result is the reduced TCP header, the identifying step identifies the reduced TCP header information. Efficient relaying of data in IP-enabled mobile communication networks. 33. The method of claim 32, wherein the identifying is And identifying the reduced TCP header information with reference to a TCP header information mapping table. The method of claim 33, The TCP header information mapping table may represent a mapping between the reduced port number and the unreduced port number. The method of claim 29, The reduced TCP header setting step may be set by referring to a TCP header information mapping table.

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