KR20110076782A - Method of transmitting contorl information and method of responsing thereof in mobile communication system - Google Patents

Abstract

PURPOSE: A control information transmission method and a response method thereof are provided to reduce overhead and the waste of resources. CONSTITUTION: A transmitter transmits a control message through payload of an MAC(Medium Access Control) PDU(Protocol Data Unit)(S500). A specific bit of an extended header is established as 1. The response of a receiver is required through the establishment. The receiver receives the control message from the transmitter. The receiver transmits the response through an MAEH(MAC control message ACK Extended Header)(S510).

Description

Control information transmission method and response method in mobile communication system {METHOD OF TRANSMITTING CONTORL INFORMATION AND METHOD OF RESPONSING THEREOF IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a mobile communication system, and more particularly, to a control information transmission method and a response method thereof in a mobile communication system.

In the mobile communication system, the base station transmits control information for controlling the state of the terminal to the terminal, and the terminal transmits a response to the control information to the base station.

The base station may transmit a control message through a payload on a medium access control protocol data unit (MAC PDU) or control information through an extension header or a signaling header on the MAC PDU.

The terminal receiving the control message from the base station responds through the response only control message or the response only extension header. The terminal receiving the control information from the base station through the extension header or signaling header on the MAC PDU responds via the extension header or signaling header on the MAC PDU. In this way, the terminal responds to the control message or control information received from the base station in various ways.

In this case, since there is no clear criterion whether the terminal responds through the response-only control message or the response-only extension header after receiving the control message, it is difficult to implement the operation of the terminal.

In addition, when the terminal receives the control information through the extension header or the signaling header, there is a problem in terms of scalability and overhead when responding through the extension header or the signaling header.

An object of the present invention is to provide a control information transmission method and a response method thereof in a mobile communication system.

A method for responding to a receiver according to an aspect of the present invention includes receiving a control message from a transmitter through a payload of a medium access control protocol data unit (MAC PDU) or receiving control information through an extension header or a signaling header of the MAC PDU. And transmitting a response to the control message or the control information through a response only extension header including information on whether the response is a response to the control message or the response to the control information.

A method for responding to a receiver according to an aspect of the present invention includes receiving a control message from a transmitter through a payload of a medium access control protocol data unit (MAC PDU) or receiving control information through an extension header or a signaling header of the MAC PDU. And transmitting a response to the control message or the control information through a response-only extension header including information on a response type including whether the response to the control message and the response to the control information are simultaneously included. Include.

In one embodiment, a method for transmitting control information of a transmitter includes transmitting a control message through a payload of a medium access control protocol data unit (MAC PDU) or transmitting control information through an extension header or a signaling header of a MAC PDU. And receiving the control message or the response to the control information through a response-only extension header including information about the response type.

The response form of the receiver varies depending on the type of control message or control information, thereby preventing the problem of difficulty in implementing the receiver. In addition, overhead and resource waste can be reduced in response of the receiver.

1 and 2 are diagrams illustrating the structure of a MAC PDU.
3 and 4 are flowcharts illustrating a general control information transmission and response method.
5 and 6 are flowcharts illustrating a control information transmission and response method according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

In the present specification, a terminal is a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment (User Equipment). It may also refer to a user equipment (UE), an access terminal (AT), and the like, and may include all or some functions of a terminal, a mobile station, a mobile terminal, a subscriber station, a portable subscriber station, a user device, an access terminal, and the like. .

In the present specification, a base station (BS) is an access node (AP), a radio access station (RAS), a radio access station (RAS), a node B (Node B), an advanced node B (evolved NodeB, eNodeB), a base transceiver station (Base Transceiver Station, BTS), MMR (Mobile Multihop Relay) -BS, etc. may be referred to, and all or part of the functions of the access node, base station, radio access station, Node B, eNodeB, transmit and receive base station, MMR-BS, etc. It may also include.

In the present specification, the transmitter may be a base station and the receiver may be a terminal, or the transmitter may be a terminal and the receiver may be a base station.

1 and 2 are diagrams illustrating the structure of a MAC PDU.

Referring to FIG. 1, the MAC PDU 100 includes a generic MAC header 110, an extended header 120, and a payload 130. The MAC PDU 100 transmits data or control messages. The data or control message is transmitted in the form of payload 130, and the extension header 120 may include additional control information or information indicating the format of the payload. In the MAC PDU 100, the generic MAC header 110 is an essential element, and the extension header 120 and the payload 130 may be additional elements. The MAC PDU 100 may include only the general MAC header 110 and the extension header 120.

Referring to FIG. 2, the MAC PDU 200 includes a signaling header 210. The MAC PDU 200 is transmitted for control purposes only and can be configured without a general MAC header to reduce overhead.

3 and 4 are flowcharts illustrating a general control information transmission and response method.

Referring to FIG. 3, the transmitter transmits a control message through the payload 130 of the MAC PDU 100 (S300). In this case, the extension header 120 of the MAC PDU 100 may include response request information for a control message. For example, when a specific bit of the extension header 120 is set to 1, it may mean that the transmitter requests a response of the receiver to the corresponding message.

After receiving the control message from the transmitter, the receiver transmits an AAI_MSG-ACK message, which is a response-only control message, or a MAEH (MAC control message ACK Extended Header), which is a response-only extended header (S310).

Referring to FIG. 4, the transmitter transmits control information through the extension header 120 of the MAC PDU 100 or the signaling header 210 of the MAC PDU 200 (S400). In this case, the transmitter may set a specific bit of the extension header 120 of the MAC PDU 100 or the specific header of the signaling header 210 of the MAC PDU 200 to 0 to inform that it is the first transmission requesting a response from the receiver. have.

The receiver receiving control information from the transmitter transmits a response through the same form, that is, through the extension header 120 of the MAC PDU 100 or the signaling header 210 of the MAC PDU 200 (S410). In this case, the receiver may set a specific bit (response) of the extension header 120 of the MAC PDU 100 or the signaling header 210 of the MAC PDU 200 to 1 to inform that it is a response to the initial transmission.

When using the control information transmission and response method of FIG. 3, there is no criterion on which of the AAI_MSG-ACK message and the MAEH is selected by the receiver receiving the control message.

In the case of using the control information transmission and response method of FIG. 4, since the receiver receiving the control information responds in the same form, there are disadvantages in terms of scalability and overhead. For example, each time a new signaling header or extended header is needed that requires a response, each header must add a new bit and the receiver must respond with a different header depending on the type of header received for the same response purpose. do. In addition, regardless of the contents of the response, unnecessary information should be included because it should be transmitted in the form of a predefined signaling header or extension header. For example, a general signaling header is defined as six bytes. In this case, the receiver should send a signaling header of 6 bytes simply for a response.

In order to solve this problem, it is necessary to unify the control message or the response format for the control information.

5 and 6 are flowcharts illustrating a control information transmission and response method according to an embodiment of the present invention.

Referring to FIG. 5, the transmitter transmits a control message through the payload 130 of the MAC PDU 100 (S500). In this case, a specific bit of the extension header 120 may be set to 1 to request a response from the receiver.

The receiver receiving the control message from the transmitter transmits a response through the MAEH (S510).

Referring to FIG. 6, the transmitter transmits control information through the extension header 120 of the MAC PDU 100 or the signaling header 210 of the MAC PDU 200 (S600). In this case, the specific header of the extension header 120 of the MAC PDU 100 or the signaling header 210 of the MAC PDU 200 may be set to 0 to indicate that the transmission is the first transmission requesting a response from the receiver.

The receiver receiving control information from the transmitter transmits a response through the MAEH (S610).

5 and 6, a receiver receiving a control message or control information from a transmitter transmits a response through the MAEH regardless of the reception type. Accordingly, the response form of the receiver varies depending on the type of the control message or the control information, thereby preventing the problem of difficulty in implementing the receiver. In addition, overhead and resource waste can be reduced in response of the receiver.

Table 1 shows the format of MAEH according to one embodiment of the present invention.

Syntax Size (bits) Notes MAEH () { type 4 Ack_type One 0: acknowledgment to control messages
1: acknowledgment to signaling headers or EHs If (Ack_type == 0) { Channel ID One ACK_SN 8 Reserved 2 For byte alignment } Else { Ack_header_type 5 Bit # 0: indicates the header type to be acknowledged; 0: signaling header, 1: extended header
Bit # 1- # 4: header type Frame_LSB 6 LBS of frame sequence
Indicates the frame that the header to be acknowledged is transmitted } }

In Table 1, Type consists of 4 bits and is a parameter indicating that the current extension header is MAEH. Ack_type consists of 1 bit and is a parameter which shows the transmission method of a control message or control information. For example, if Ack_type is set to 0, this means that it is a response to a control message. If Ack_type is set to 1, it may mean that it is a response to control information transmitted through a signaling header or an extension header.

If Ack_type is 0, Channel ID indicates the number of the channel ID (Identification) to which the control message is transmitted, and ACK_SN indicates the sequence number included in the control message. To set the total length of MAEH to 2 bytes, 2 bits can be reserved.

When Ack_type is 1, Ack_header_type has 5 bits and indicates the type of the header in which control information is transmitted. For example, the first bit indicates whether the header in which the control information is transmitted is a signaling header or an extended header, and the remaining bits indicate the type value of the header in which the control information is transmitted. Frame_LSB consists of 6 bits and indicates when the header to which control information is transmitted is the header. For example, the header may indicate the lower 6 bits of the frame number of the received frame.

Table 2 shows the format of MAEH according to another embodiment of the present invention.

Syntax Size (bits) Notes MAEH () { type 4 Ack_type One 0: acknowledgment to control messages
1: acknowledgment to signaling headers or EHs If (Ack_type == 0) { Channel ID One ACK_SN 8 Reserved 2 For byte alignment } Else { Do { Ack_header_type 5 Bit # 0: indicates the header type to be acknowledged; 0: signaling header, 1: extended header
Bit # 1- # 4: header type Frame_LSB 5 LBS of frame sequence
Indicates the frame that the header to be acknowledged is transmitted End One 0: no more ack information
1: more ack information } while (End) } }

When the receiver receives control information through several headers, it may take the form of Table 2 to transmit a response through one MAEH. Table 2 is the same as Table 1 except that Ack_type is 1, further including End. End indicates whether several Ack_header_type and Frame_LSB are included in one MAEH.

Table 3 shows the format of MAEH according to another embodiment of the present invention.

Syntax Size (bits) Notes MAEH () { type 4 Ack_Indicator 2 Bit # 0: indicates the inclusion of an ACK to a control message
Bit # 1: indicates the inclusion of an ACK to signaling headers or extended headers If (Bit # 0 of Ack_Indicator == 1) { Channel ID One ACK_SN 8 Reserved One For byte alignment } If (Bit # 1 of Ack_Indicator == 1) { Do { Ack_header_type 5 Bit # 0: indicates the header type to be acknowledged; 0: signaling header, 1: extended header
Bit # 1- # 4: header type Frame_LSB 4 LBS of frame sequence
Indicates the frame that the header to be acknowledged is transmitted End One 0: no more ack information
1: more ack information } while (End) } }

In order to simultaneously transmit a response to a control message and a response to a plurality of control information through a single MAEH, the format shown in Table 3 may be used. Table 3, unlike Table 1 and Table 2, contains two bits of Ack_Indicator. The 0th bit of the Ack_Indicator represents the response to the control message, and the 1st bit represents the response to the control information. That is, when Ack_Indicator is 11, this means that the corresponding MAEH includes both a response to the control message and a response to the control information. Meanwhile, in order to simultaneously transmit responses to several control information, Table 3 includes End when the first bit of Ack_Indicator is 1 like Table 2.

Table 4 shows the format of MAEH according to another embodiment of the present invention.

Syntax Size (bits) Notes MAEH () { type 4 Ack_Indicator 2 Bit # 0: indicates the inclusion of an ACK to a control message
Bit # 1: indicates the inclusion of an ACK to signaling headers or extended headers If (Bit # 0 of Ack_Indicator == 1) { Channel ID One ACK_SN 8 Reserved One For byte alignment } If (Bit # 1 of Ack_Indicator == 1) { Do { Ack_header_type 5 Bit # 0: indicates the header type to be acknowledged; 0: signaling header, 1: extended header
Bit # 1- # 4: header type Frame_LSB 3 LBS of frame sequence
Indicates the frame that the header to be acknowledged is transmitted Response One 0: accept the request
1: reject the request End One 0: no more ack information
1: more ack information } while (End) } }

In order to simultaneously transmit a response to a control message and a response to a plurality of control information through a single MAEH, the format shown in Table 4 may be used. Table 4 is the same as Table 3 except for the response when the 1st bit of Ack_Indicator is 1. Response indicates whether to accept the request of the transmitter. That is, when the transmitter requests a state change or operation of the receiver through a signaling header or an extended header, the receiver may respond to the request of the transmitter through a response of the MAEH.

As such, since the receiver transmits a response through the 2-byte MAEH regardless of the type of control message or control information transmitted by the transmitter, the overhead of the receiver can be reduced. In addition, a single MAEH may respond to several control messages or control information.

The embodiments of the present invention described above are not only implemented through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiments of the present invention or a recording medium on which the program is recorded.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (17)

In the response method of the receiver,
Receiving a control message from a transmitter through a payload of a medium access control protocol data unit (MAC PDU) or receiving control information through an extension header or a signaling header of the MAC PDU; and
And transmitting a response to the control message or the control information through a response only extension header including information on whether the response is a response to the control message or the response to the control information. The method of claim 1,
If the response to the control message, the response-only extension header further comprises a channel ID (Identification) to which the control message is transmitted and a sequence number included in the control message. The method of claim 1,
And in response to the control information, the response only extension header includes a type of a header in which the control information is transmitted and a frame number of a frame in which the header in which the control information is transmitted is received. The method of claim 3,
The response only extension header further comprises information of the number of responses included in the response only extension header. The method of claim 1,
The response only extension header has a 2-byte length. The method of claim 1,
And the control message or the control information requests a response from the receiver using a predetermined bit. In the response method of the receiver,
Receiving a control message from a transmitter through a payload of a medium access control protocol data unit (MAC PDU) or receiving control information through an extension header or a signaling header of the MAC PDU; and
And transmitting the response to the control message or the control information through a response only extension header including information on a response type including whether the response to the control message and the response to the control information are simultaneously included. Response method. The method of claim 7, wherein
The information about the response type is composed of 2 bits,
A first bit indicates whether the response only extension header includes a response to the control message, and a second bit indicates whether the response only extension header includes a response to the control information. The method of claim 8,
If the response only extension header includes a response to the control message, the response only extension header further includes a channel identification (ID) to which the control message is transmitted and a sequence number included in the control message. How to respond. The method of claim 8,
When the response only extension header includes a response to the control information, the response only extension header includes a type of a header in which the control information is transmitted and a frame number of a frame in which the header in which the control information is transmitted is received. Response method. The method of claim 10,
The response only extension header further comprises information of the number of responses included in the response only extension header. The method of claim 7, wherein
The response only extension header has a 2-byte length. The method of claim 7, wherein
And the control message or the control information requests a response from the receiver using a predetermined bit. In the control information transmission method of the transmitter,
Transmitting a control message through a payload of a medium access control protocol data unit (MAC PDU) or transmitting control information through an extension header or a signaling header of the MAC PDU; and
And receiving the control message or the response to the control information through a response only extension header including information about a response type. The method of claim 14,
And transmitting the control message or the control information from the receiver using a predetermined bit. The method of claim 14,
The information about the response type includes information on whether the response is a response to the control message or the control information. The method of claim 14,
The information on the response type includes control information transmission method including whether the response to the control message and whether the response to the control information at the same time.

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