WO2011108894A2

WO2011108894A2 - Multicast and broadcast service settings data management method and device

Info

Publication number: WO2011108894A2
Application number: PCT/KR2011/001527
Authority: WO
Inventors: 김은경; 차재선; 정수정; 장성철; 이현; 윤철식
Original assignee: 한국전자통신연구원
Priority date: 2010-03-04
Filing date: 2011-03-04
Publication date: 2011-09-09
Also published as: WO2011108894A3

Abstract

Provided is a management method for a user terminal MBS settings data, wherein an MBS setting message, which contains settings data for MBS operation and the effective period, is decoded, and the MBS settings message, which is transmitted at the moment designated by the effective period, is subsequently decoded again.

Description

Method and device for managing multicast and broadcast service setting information

The present invention relates to a method and apparatus for managing multicast and broadcast service (MBS) configuration information.

MBS is a point-to-multipoint transmission method that simultaneously transmits data packets from one source to a plurality of destinations. The broadcast service refers to a service transmitted to all users, and the multicast service refers to a service transmitted to a specific group of users.

The terminal receives the MBS configuration message from the base station to obtain the information of the MBS MAP, and receives and decodes the MBS MAP representing the MBS burst data information based on the information of the MBS MAP. The terminal may acquire burst information corresponding to the MBS content based on the MBS MAP, and receive and decode the corresponding burst.

The MBS setup message has a lifetime, during which the MBS setup message does not change. Therefore, when the valid period expires (expire) and the MBS configuration message is changed, the terminal should receive the MBS configuration message again. If the MBS configuration message does not change even when the validity period expires, the terminal maintains the information of the MBS configuration message at the stored value, resets the validity period to the original value, and the timer operates again. Whether to change the MBS setting message is provided to the MBS MAP.

However, since the valid period of the MBS configuration message is counted down and transmitted every time the MBS configuration message is transmitted, the validity period may not be obtained correctly according to the time point at which the UE joins the MBS. In this case, if the validity period expires and the MBS setting message is not changed, a problem may occur in which the validity period cannot be reset to the correct value.

An object of the present invention is to provide an MBS configuration information management method and apparatus capable of accurately obtaining an MBS configuration message.

According to an aspect of the present invention, a method for managing MBS configuration information in a terminal is provided. The method for managing MBS configuration information includes decoding an MBS configuration message including configuration information for the MBS operation and a validity period, and decoding the MBS configuration message transmitted at a time point designated by the validity period.

The MBS configuration message may be transmitted at intervals of N _superframes , and the validity period is designated as a _superframe satisfying [N _superframe modulo (N × m + 1)) == N × (m + 1) −n]. Can be. Here, N _superframe is a _superframe number, m is the validity period, n is an integer greater than 0 and less than N.

N may be 32, and n may be 1.

The terminal may not decode the MBS setup message transmitted before the time period designated by the validity period.

The configuration information may include information of MBS MAP, and the MBS MAP may include information of MBS data burst.

According to another aspect of the present invention, a method for managing MBS configuration information in a base station is provided. The method of managing MBS configuration information includes periodically transmitting an MBS configuration message including configuration information for the MBS operation and a valid period, and providing an MBS according to the MBS configuration message. In this case, the validity period designates a time point at which the terminal decodes the MBS configuration message.

After the terminal decodes the MBS configuration message, it may not decode the MBS configuration message transmitted before the time point designated by the validity period.

The MBS configuration information management method may further include resetting the value of the validity period after the expiration of the validity period.

In accordance with still another aspect of the present invention, there is provided a method of managing MBS configuration information in a terminal, the method comprising: moving to a cell boundary region, and MBS configuration message including configuration information for an MBS operation transmitted when moving to the cell boundary region; Decoding the.

The MBS configuration information management method may further include decoding the MBS configuration message transmitted at a time point designated by the validity period, and the MBS configuration message may further include the validity period.

According to another feature of the present invention, there is provided an apparatus for managing MBS configuration information of a terminal. The apparatus for managing MBS configuration information may include: a decoder for decoding an MBS configuration message including configuration information for the MBS operation and a validity period; and controlling the decoder to decode an MBS configuration message transmitted at a time point specified by the validity period. It includes a control unit.

The controller may control the decoder so as not to decode the MBS setting message transmitted before the time period designated by the validity period.

The controller may control the decoder to decode the MBS configuration message transmitted when the terminal moves to the cell boundary region.

According to an embodiment of the present invention, the UE may receive and decode the MBS-CFG message again at a point in time designated by the validity period through a fixed validity period regardless of the time of participation in the MBS.

According to another embodiment of the present invention, even if the MBS configuration information varies depending on the cell, since the UE can always obtain MBS configuration information of the corresponding cell, the UE can accurately receive the MBS of the corresponding cell.

1 is a schematic flowchart of an MBS supporting method according to an embodiment of the present invention.

2 and 5 are diagrams illustrating a method for managing MBS configuration information according to an embodiment of the present invention, respectively.

3 is a diagram illustrating an MBS-CFG message according to an embodiment of the present invention.

4 illustrates an MBS MAP according to an embodiment of the present invention.

6 is a schematic block diagram of an apparatus for managing MBS configuration information 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. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. 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, a terminal may be a mobile terminal (MT), a mobile station (MS), a subscriber station (SS), a portable subscriber station (PSS), an access terminal (access) terminal, AT, user equipment (UE), etc., and may include all or part of the functions of the MT, MS, SS, PSS, AT, UE, and the like.

In addition, the base station (BS) is a node B (eB), an evolved node B (eNodeB), an access point (AP), a radio access station (radio access station (RAS)), a base transceiver station may refer to a base transceiver station (BTS), a mobile multihop relay (MMR) -BS, and the like, and may include all or a part of functions of a NodeB, an eNodeB, an AP, a RAS, a BTS, an MMR-BS, and the like.

Referring to FIG. 1, the terminal transmits information on the MBS mode supported by the terminal to the base station, and the base station transmits information on the MBS mode supported by the terminal to the terminal (S110). Through this process, the base station and the terminal exchange for MBS capability (capability). In this case, the terminal may transmit the MBS mode information by using a registration request (REQ-REQ) message for the registration request when the network enters or re-entries, the base station is a response message (registration response, REG-REQ message) MBS mode information can be transmitted using a REG-RSP) message.

Next, the base station transmits a connection establishment request message to the terminal for establishing the MBS connection, and the terminal transmits a response message to the base station (S120). In this case, a dynamic service addition request (DSA-REQ) message may be used as the connection establishment request message, and a dynamic service addition response (DSA-RSP) as a response message to the connection establishment request message. You can use messages. On the other hand, the UE may start the MBS connection establishment request, in this case, the terminal may transmit a DSA-REQ message to the base station, the base station may transmit a DSA-RSP message to the terminal.

Afterwards, for the MBS operation, the UE acquires MBS configuration information by receiving an MBS configuration (MBS configuration, MBS-CFG) message transmitted by the base station (S130). The terminal acquires the MBS MAP based on the MBS configuration information (S140), receives the MBS MAP from the base station based on the information of the MBS MAP, and receives the MBS (S150).

Next, the MBS configuration information management method according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 4.

2 is a diagram illustrating a method for managing MBS configuration information according to an embodiment of the present invention, FIG. 3 is a diagram illustrating an MBS-CFG message according to an embodiment of the present invention, and FIG. 4 is an embodiment of the present invention. MBS MAP according to FIG.

Referring to FIG. 2, the base station transmits an MBS-CFG message at regular intervals. For example, the base station may transmit the MBS-CFG message every 32 superframes, and in particular, the base station transmits the MBS-CFG message in a _superframe in which the _superframe number (N _superframe ) satisfies the condition of Equation (1). Can be. That is, the base station may transmit the MBS-CFG message in the superframe immediately before the superframe number becomes a multiple of 32. In this case, one superframe may be composed of a plurality of frames, for example, four frames. On the other hand, when the base station transmits the MBS-CFG message every N superframes, Equation 1 may be as shown in Equation 2.

[Equation 1]

N _superframe modulo 32 == 31

[Equation 2]

N _superframe modulo N == (N-1)

Referring to FIG. 3, the MBS-CFG message is MBS configuration information. For each MBS zone, MBS Zone ID, MBS MAP resource information applied to the MBS zone identifier, burst size information of MBS MAP, A neighbor MBS Zone ID, a current MBS ID (MBS ID) between a serving MBS zone and a neighbor MBS zone, and a flow ID (flow ID, FID) and mapping information of a new MBS ID and FID are included. Here, the resource information of the MBS MAP may be a resource index (MBS MAP Resource Index) indicating the location and allocation size of the MBS MAP resource, the burst size information of the MBS MAP is the offset used to calculate the burst size of the MBS MAP ( MBS MAP I _SizeOffset ). The MBS ID is an identifier assigned to the terminal to receive the MBS, and the FID is an identifier assigned to the MBS connection and exists in pairs with the corresponding MBS ID. The MBS-CFG message further includes a valid period LIFETIME indicating a period during which the MBS configuration information is not changed. The validity period specifies a time point at which the UE receives and decodes the MBS-CFG message and does not count down.

Referring back to FIG. 2, the terminal decodes the MBS-CFG message, checks the information of the MBS MAP corresponding to the MBS zone to which it belongs, and receives the MBS MAP. The terminal does not decode the MBS-CFG message again until the time point specified in the valid period of the decoded MBS-CFG message is received, at which point the MBS-CFG message is received and decoded again.

Since the validity period of the MBS-CFG message designates the point in time at which the new MBS-CFG message should be decoded, the terminal 110 participating in the MBS before the k-th transmission of the MBS-CFG message and the MBS-CFG message after the k-th transmission of the MBS-CFG message are received. All participating terminals 120 confirm the same valid period. The terminal 110 or 120 does not decode the MBS-CFG message until a time point designated in the valid period, and receives and decodes the MBS-CFG message at that time. Specifically, if the valid period of the MBS-CFG message is m, the terminals 110 and 120 decode the MBS-CFG message again when the _superframe number (N _superframe ) satisfies the condition of Equation 3. That is, the UE can check the time point specified in the valid period as the remaining low bits except the high bit exceeding 32 ms (m + 1) among the _superframe number N _superframe .

[Equation 3]

N _superframe modulo (32 × (m + 1)) == 32 × m + 1) -1

Meanwhile, when the base station transmits the MBS-CFG message at intervals of N superframes, Equation 3 may be expressed by Equation 4. Equation 3 may be expressed by Equation 5 when the base station transmits the MBS-CFG message in the n-th superframe when the superframe number is a multiple of N.

[Equation 4]

N _superframe modulo (N × (m + 1)) == N × (m + 1) -1

[Equation 5]

N _superframe modulo (N × (m + 1)) == N × (m + 1) -n

Where n is an integer greater than or equal to 0 and less than N.

On the other hand, after the validity period ends, the station may reset the value m of the validity period of the MBS-CFG message.

Referring to FIG. 4, the MBS MAP includes information on the MBS data burst, and specifically, the number of MBS streams, the MBS stream identifier, the size information of the MBS data burst, and the MBS multi-output multi-output (MIMO) mode. Information and location information of the MBS data burst. Since the MBS stream may be defined as a pair of MBS ID and FID, the number of MBS streams is the number of MBS ID and FID pair (Number of MBS ID + FID), and the MBS stream identifier is a pair of MBS ID and FID ( MBS ID + FID). The size information of the MBS data burst may be an offset used to calculate the size of the MBS data burst. In addition, the location information of the MBS data burst may include an offset (MBS subframe offset) indicating the index of the subframe where the MBS data burst ends and the location of the resource index (MBS resource index) where the MBS data burst ends.

Meanwhile, the MBS MAP may further include an MBS-CFG change indication indicating whether the MBS-CFG message to be transmitted next has been changed. In this case, when the MBS configuration change indicator indicates the MBS configuration change, the terminal may receive the MBS-CFG message transmitted next.

As described above, according to an exemplary embodiment of the present invention, the terminals 110 and 120 may receive and decode the MBS-CFG message again at a time point designated by the validity period through a fixed validity period regardless of the time point of participation in the MBS.

5 is a diagram illustrating a method of managing MBS configuration information according to another embodiment of the present invention.

Referring to FIG. 5, when the terminal 130 crosses a boundary area of the cell 210 due to a movement from one cell 210 to another cell 220, the terminal 130 is valid of the MBS-CFG message. Regardless of the duration, always receive and decode MBS-CFG messages. Then, even if the MBS configuration information varies depending on the cell, the terminal 130 may always obtain the MBS configuration information of the corresponding cell, and thus may correctly receive the MBS of the corresponding cell.

Next, an apparatus for managing MBS configuration information capable of performing the method of managing MBS configuration information according to an embodiment of the present invention will be described with reference to FIG. 6.

Referring to FIG. 6, the device 600 for managing MBS configuration information of the terminal includes a decoder 610 and a controller 620.

The decoder 610 receives and decodes the MBS-CFG message transmitted from the base station, and the control unit 620 decodes the MBS-CFG message transmitted at the time point specified by the decoder 610 in the valid period of the MBS-CFG message. To control. In addition, the controller 620 controls the decoder 610 to decode the MBS-CFG message transmitted when the terminal passes the cell boundary region.

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

A method for managing multicast and broadcast service (MBS) configuration information in a terminal,

Decoding an MBS configuration message including configuration information and an expiration date for the MBS operation; and

Decoding an MBS setup message transmitted at a time point specified by the valid period;

MBS setting information management method comprising a.
In claim 1,

The MBS configuration message is transmitted in cycles of N superframes,

The time period designated by the valid period is a superframe satisfying [N superframe modulo (N × (m + 1)) == N × (m + 1) −n],

N superframe is a superframe number, m is the validity period, n is an integer greater than 0 and less than N

How to manage MBS setting information.
In claim 2,

Wherein N is 32 and n is 1;
In claim 1,

And the terminal does not decode the MBS configuration message transmitted before the time period designated by the validity period.
In claim 1,

The configuration information includes information of MBS MAP,

The MBS MAP includes information of MBS data bursts.

How to manage MBS setting information.
A method for managing multicast and broadcast service (MBS) configuration information at a base station,

Periodically transmitting an MBS configuration message including configuration information for the MBS operation and a valid period; and

Providing an MBS according to the MBS setting message

Including;

The validity period designates a time point at which the terminal decodes the MBS configuration message.

How to manage MBS setting information.
In claim 6,

The MBS configuration message is transmitted in cycles of N superframes,

The time period designated by the valid period is a superframe satisfying [N superframe modulo (N × (m + 1)) == N × (m + 1) −n],

N superframe is a superframe number, m is the validity period, n is an integer greater than 0 and less than N

How to manage MBS setting information.
In claim 7,

Wherein N is 32 and n is 1;
In claim 6,

And after the terminal decodes the MBS configuration message, does not decode the MBS configuration message transmitted before the time period designated by the validity period.
In claim 6,

Resetting the value of the validity period after the expiration of the validity period.
A method for managing multicast and broadcast service (MBS) configuration information in a terminal,

Moving to a cell boundary region, and

Decoding an MBS configuration message including configuration information for MBS operation transmitted when moving to the cell boundary region;

MBS setting information management method comprising a.
In claim 11,

Decoding the MBS setup message transmitted at the time point specified by the validity period,

The MBS setting message further includes the validity period.

How to manage MBS setting information.
In claim 12,

The MBS configuration message is transmitted in cycles of N superframes,

The time period designated by the valid period is a superframe satisfying [N superframe modulo (N × (m + 1)) == N × (m + 1) −n],

N superframe is a superframe number, m is the validity period, n is an integer greater than 0 and less than N

How to manage MBS setting information.
In claim 13,

Wherein N is 32 and n is 1;
In claim 11,

And the terminal does not decode the MBS configuration message transmitted before the time period designated by the validity period.
A multicast and broadcast service (MBS) configuration information management device of a terminal,

Decoder for decoding MBS configuration message including configuration information and validity period for MBS operation, and

A control unit controlling the decoder to decode the MBS setting message transmitted at a time point designated by the valid period

MBS setting information management device comprising a.
The method of claim 16,

The MBS configuration message is transmitted in cycles of N superframes,

The time period designated by the valid period is a superframe satisfying [N superframe modulo (N × (m + 1)) == N × (m + 1) −n],

N superframe is a superframe number, m is the validity period, n is an integer greater than 0 and less than N

MBS setting information management device.
The method of claim 17,

The N is 32, n is 1 MBS configuration information management device.
The method of claim 16,

And the control unit controls the decoder not to decode the MBS setting message transmitted before the time period designated by the validity period.
The method of claim 16,

And the control unit controls the decoder to decode the MBS configuration message transmitted when the terminal moves to the cell boundary region.
The method of claim 16,

The configuration information includes information of MBS MAP,

The MBS MAP includes information of MBS data bursts.

MBS setting information management device.