KR101657312B1 - Method and apparatus for control message transmitting/receiving in wireless communication system - Google Patents

Abstract

A method for transmitting a control message of a transmitter in a wireless communication system, the method comprising: generating at least one media access control (MAC) layer control information; Generating a payload by encoding the MAC layer control information using an encoding scheme corresponding to the control information; Generating a header including encoding information indicating the encoding scheme; And generating and transmitting a control message including the header and the payload, wherein the control message includes control information including various types of control messages for controlling the MAC layer and the PHY layer of the wireless communication system, It is possible to prevent waste of computation resources and radio resources of the transmission / reception apparatus due to uniform encoding regardless of the type.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control message transmission /

The present invention relates to a method and apparatus for transmitting and receiving a control message in a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving a control message when various control message encoding methods are used.

As a new wireless transmission standard that can meet the demand for large capacity data services such as voice communication as well as various multimedia Internet services in the wireless communication market, IEEE 802.16e WiBro (Wireless Broadband) or Mobile WiMAX (World Wide Interoperability for Microwave Access), wireless LAN (Local Area Network), and 3GPP (Long Term Evolution).

In a wireless communication system, various control messages are used for control in a MAC (Media Access Control) layer and a PHY layer (physical layer). These control messages are encoded and transmitted / received between the transmitting end and the receiving end. Generally, any one of the encoding methods for the control message has been applied.

The control messages in the wireless communication system have various functions and are used for different purposes. Although messages used for various functions and purposes can be used as a single message encoding method, It is also necessary to apply various encoding methods.

That is, various encoding schemes are emerging due to the development of communication protocols, and encoding schemes for various control messages used by the wireless communication system may be different. Accordingly, there is a need to define a method of generating and transmitting a control message at a transmitting end and a method of receiving and decoding a control message received at a receiving end according to which encoding scheme is applied to an arbitrary control block .

Accordingly, the present invention proposes a method and apparatus for generating and transmitting a control message by encoding one or more control information generated in the MAC layer in an encoding mode corresponding to the control information in a transmitter of a wireless communication system.

Also, the present invention proposes a method and apparatus for checking control information from a control message encoded in one or more encoding schemes included in a MAC control message received at a receiver of a wireless communication system.

In addition, the present invention proposes a method for indicating one or more MAC control information encoding schemes in a transmitter of a wireless communication system, that is, a method and apparatus for transmitting an encoding scheme of the control information to a receiver.

A method for transmitting a control message in a wireless communication system, the method comprising: generating at least one MAC layer control information; Generating a payload by encoding using an encoding scheme corresponding to the control information; Generating a header including encoding information indicating the encoding scheme; And generating a control message including the header and the payload.

By applying one or more encoding schemes to various control messages for controlling the MAC layer and the PHY layer of the wireless communication system, it is possible to reduce the computational resources and wireless resources of the transceiver due to uniform encoding regardless of the type of control information .

Also, even if one or more pieces of control information are encoded in different encoding schemes, it is possible for the receiving end to recognize the encoding scheme, thereby enabling checking of the control information of the receiving end.

1 is a block diagram of a transmitting apparatus for generating a control message required in a MAC and PHY layer according to a preferred embodiment of the present invention;
2 is a diagram illustrating a concrete example of a control message encoding method according to a preferred embodiment of the present invention;
3 is a diagram illustrating a portion (payload generation) of a control message generation process in a transmitter according to a preferred embodiment of the present invention;
4 is a diagram showing a part of a control message confirmation process (payload reception) in a receiving end according to a preferred embodiment of the present invention;
5 is a diagram illustrating a structure of a MAC control message generated according to a preferred embodiment of the present invention;
FIG. 6 illustrates a process of generating a control message from a control message payload of a MAC layer according to a preferred embodiment of the present invention; FIG.
7 is a diagram illustrating a process of checking a control message payload from a MAC layer control message in a receiver according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. It should be noted that the same configurations of the drawings denote the same reference numerals as much as possible.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

In the present specification, a communication standard based on IEEE 802.16 will be referred to in describing a control message transmission / reception operation in a wireless communication system. However, the control message transmission / reception operation according to the present invention is not limited to a specific communication protocol or system configuration, and various modifications may be made without departing from the gist of the present invention. It should be apparent to those skilled in the art, Of course, it is an issue.

1 is a block diagram of a transmitting apparatus for generating a control message required in a MAC and a PHY layer according to a preferred embodiment of the present invention.

It should be noted that the term " block " used below is used to mean a 'module' or a 'function' included in a transmitting apparatus or a receiving apparatus. That is, 'control block' can be used in the same meaning as 'controller' or 'controller'.

In the wireless communication system, there are call flow related control information in the MAC layer. The call processing related control block 100 is connected to a network such as network initial connection, handover, encryption, paging, And processes control information that requires communication with an existing station.

The ARQ and MAC PDU control block 102 processes information related to ARQ (Automatic Retransmission Request) or MAC PDU (Protocol Data Unit) generation and transmission to provide reliability in the MAC layer.

The physical layer related control block 104 processes related information for supporting HARQ (hybrid automatic retransmission request) related to the PHY layer, channel quality, power control, and multiple input multiple output (MIMO).

The message payload encoding control blocks 1, 2, and 3 (110, 112, and 114) receive control information of the control blocks 100, 102, and 104 and perform encoding. Since the three function blocks 100, 102, and 104 can be implemented in separate chips or hardware in actual implementation (although they may be implemented in one chip or hardware), the three control blocks 100, The control message encoding method of FIG. That is, the message payload encoding control blocks 1, 2 and 3 (110, 112 and 114) can encode the control information of the control blocks 100, 102 and 104 according to different encoding schemes.

Control information generated for each of the control blocks 100, 102 and 104 is transmitted to the control message generator 120. The control message generator 120 located in the MAC layer generates a MAC message using the encoded control information. The generated message is transmitted from the transmitting end to the receiving end by a transmitter (not shown). The receiving end receives the message by performing an operation in a reverse order of the operation in the transmitting end. That is, the received control messages are moved to respective functional blocks, and necessary information is obtained from control messages through different decoding methods.

FIG. 2 shows a concrete example of a control message encoding method according to a preferred embodiment of the present invention.

In the case of the call processing-related control block 100, communication with an upper layer network station is often required. Therefore, the ASN.1 (Abstract Syntax Notation number One), which is a commonly used communication encoding method, ) Encoding method, the control information can be generated. The ASN.1 encoding block 200 performs encoding on the control information of the call processing related control block 100 through the ASN.1 encoding method.

In addition, since ARQ and MAC PDU control information for communication between a transmitting end and a receiving end occurs only in a pure MAC layer, and control information for controlling the physical layer (PHY layer) is information that does not require communication with an upper network station, A control message can be generated without encoding in the plain text method of the Information Element method. The plane text generation block 202 processes control information of the ARQ and MAC PDU error control block 102 and the physical layer related control block 104 so as to be generated as a control message without encoding.

Control information encoded differently for each control block is converted into a control message format of the MAC layer in the control message generator 120, and is transmitted to a transmitting end by a transmitter (not shown).

3 is a diagram illustrating a portion (payload generation) of a control message generation process in a transmitter according to a preferred embodiment of the present invention.

In the MAC layer, control information for MAC or PHY layer control is generated from control blocks (100, 102, 104) having different functions (300).

The generated control information is encoded (302) according to encoding information corresponding to the control information. Here, the encoding information refers to information indicating the encoding method of each.

A payload of the control message is generated using the encoded control information (304). That is, the encoded control information is a payload of a control message generated in the MAC layer for transmission to a receiving end.

4 is a diagram illustrating a portion of a control message confirmation process (payload reception) in a receiver according to a preferred embodiment of the present invention.

The receiving end receives the MAC control message transmitted from the transmitting end and acquires a payload from the control message (400).

The receiver decodes the obtained payloads according to the encoding information (402). Here, the encoding information is information indicating an encoding scheme determined according to which control block the control message is generated.

The receiver decodes the payload in the MAC layer to check call control related information and control information of the MAC or PHY layer (404).

5 is a diagram illustrating a structure of a MAC control message generated according to a preferred embodiment of the present invention.

The MAC control message according to the preferred embodiment of the present invention is divided into a MAC header 508 and a MAC control message payload 510. The MAC control message payload 510 corresponds to the control information part encoded according to the encoding scheme (i.e., encoding information) of the control information generated from each control block of the transmitter. In addition, the MAC header 508 is a portion including the encoding information and other information.

The portion of the MAC header 508 includes a portion of a generic header 506 and a portion of a payload specific header 504. [ The payload specific header 504 is a header that differs for each payload included in the MAC control message.

The payload specific header 504 includes a payload encoding information 500 portion and other information 502 portion. The payload encoding information 500 includes information on different encoding schemes of control information generated for different control blocks of the transmitter, that is, encoding information.

6 is a diagram illustrating a process of generating a control message from a control message payload of a MAC layer according to a preferred embodiment of the present invention.

The sender (specifically, the sender's control message generator) checks the payload generated through the process of FIG. 3 (600). Also, the transmitting end confirms the encoding information applied to the payload (602). Then, the transmitting terminal generates a header of the control message using the encoding information, and completes the entire control message (604).

That is, the transmitter adds a MAC header 508 to the control message payload 510 of the MAC layer to generate a MAC control message. The MAC header includes a common header part 506 and a payload specific header 504 And includes different encoding information for the control information generated for each control block in the payload specific header 504.

7 is a diagram illustrating a process of checking a control message payload from a MAC layer control message in a receiver according to a preferred embodiment of the present invention.

The receiving end confirms the header part of the MAC control message, specifically, the payload specific header 504 (700). Also, the receiver checks 702 the encoding information by checking the payload specific header 504. Then, the receiving end checks the control information by decoding the payload of the control message using the checked encoding information (704).

The payload specific header according to the preferred embodiment of the present invention can be configured as shown in Table 1 below.

Syntax Size  ( bit ) Notes MCEH () {   Type 4 MCEH type   EC One Encryption Control indicator
0 = Payload is not encrypted
1 = Payload is encrypted Control Connection Channel ID (CCC ID) One Channel ID to identify separate fragmentation / reassembly state machines
0: channel 1
1: channel 2 ASN_1 encoding indicator One 0: MAC payload is plain text
1: MAC payload is encoded by ASN.1      Polling One 0 = no acknowledgment required
1 = acknowledge required upon receiving the MAC message      FC 2 Fragmentation control      SN 6 }

In the case of generation of the control message described with reference to FIG. 2, the following information may be included in the payload-specific header. That is, a 1 bit indicator for whether the control information of the MAC message is encoded in the ASN.1 manner or not in the plain text can be included in the payload specific header.

As an example of a wireless communication system, in an Advanced Mobile-WiMAX system, a header corresponding to information of the payload specific header is defined as a MAC Control Extended header (MCEH). The indicator for the encoding information of the control information may be included as an 'ASN_1 encoding indicator (ASN_1 encoding indicator)' as shown in Table 1 above.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

Claims (12)

delete A method for transmitting a control message of a transmitter in a wireless communication system,
Generating at least one media access control (MAC) layer control information;
Generating a payload by encoding the MAC layer control information according to an encoding scheme corresponding to the MAC layer control information;
Generating a header including encoding information indicating the encoding scheme; And
And generating and transmitting a control message including the header and the payload,
Wherein the MAC layer control information includes call control related control information,
Wherein the encoding scheme corresponding to the MAC layer control information is an ASN.1 (Abstract Syntax Notation Number One) encoding scheme. A method for transmitting a control message of a transmitter in a wireless communication system,
Generating at least one media access control (MAC) layer control information;
Generating a payload by encoding the MAC layer control information according to an encoding scheme corresponding to the MAC layer control information;
Generating a header including encoding information indicating the encoding scheme; And
And generating and transmitting a control message including the header and the payload,
Wherein the MAC layer control information includes at least one of ARQ (Automatic Retransmission Request) control information, MAC PDU (protocol data unit) control information, and physical layer control information,
Wherein the encoding scheme corresponding to the MAC layer control information is an encoding scheme for plain text. 3. The method of claim 2,
The header including a common header portion and a payload specific header,
Wherein the encoding information is included in the payload specific header. The method of claim 3,
Wherein the encoding scheme for the plain text is an encoding scheme without encoding. delete A method for receiving a control message of a receiver in a wireless communication system,
Receiving a control message including a header and a payload;
Obtaining encoding information indicating an encoding method of media access control (MAC) layer control information included in the payload from the header; And
And decoding the MAC layer control information according to the encoding information to identify the MAC layer control information,
Wherein the MAC layer control information includes call control related control information,
Wherein the encoding scheme corresponding to the MAC layer control information is an ASN.1 (Abstract Syntax Notation Number One) encoding scheme. A method for receiving a control message of a receiver in a wireless communication system,
Receiving a control message including a header and a payload;
Obtaining encoding information indicating an encoding method of media access control (MAC) layer control information included in the payload from the header; And
And decoding the MAC layer control information according to the encoding information to identify the MAC layer control information,
Wherein the MAC layer control information includes at least one of ARQ (Automatic Retransmission Request) control information, MAC PDU (protocol data unit) control information, and physical layer control information,
Wherein the encoding scheme corresponding to the MAC layer control information is an encoding scheme for plain text. 8. The method of claim 7,
The header including a common header portion and a payload specific header,
Wherein the encoding information is included in the payload specific header. 9. The method of claim 8,
Wherein the encoding scheme for the plain text is an encoding scheme without encoding. A transmission apparatus for transmitting a control message in a wireless communication system,
Generates at least one media access control (MAC) layer control information, generates a payload by encoding the MAC layer control information with an encoding method corresponding to the MAC layer control information, and includes encoding information indicating the encoding method And generating a control message including the header and the payload; And
And a transmitter for transmitting the generated control message,
Wherein the MAC layer control information includes call control related control information,
Wherein the encoding scheme corresponding to the MAC layer control information is an ASN.1 (Abstract Syntax Notation Number One) encoding scheme. A receiving apparatus for receiving a control message in a wireless communication system,
A receiving unit for receiving a control message including a header and a payload; And
Acquires encoding information indicating an encoding scheme of media access control (MAC) layer control information included in the payload from the header, and decodes the MAC layer control information according to the encoding information to identify the MAC layer control information A control block,
Wherein the MAC layer control information includes call control related control information,
Wherein the encoding scheme corresponding to the MAC layer control information is an ASN.1 (Abstract Syntax Notation Number One) encoding scheme.

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