KR101426762B1 - Method and apparatus for optimizing coverage by using dummy packet in Broadcast Multicast Service system - Google Patents

Abstract

A method and apparatus for optimizing coverage using dummy packets in a BCMCS system. To this end, A method of providing coverage optimization using a dummy packet in a Broadcast Multicast Service (BCMCS) system includes the steps of: (a) counting the number of packets stored in a queue of a media control apparatus; Generating a dummy packet; and transmitting the dummy packet to the base station. Accordingly, it is possible to distinguish whether a packet error occurs due to a poor radio environment or an error caused by a packet, Thereby improving efficiency in optimization.

Description

TECHNICAL FIELD The present invention relates to a method and an apparatus for optimizing coverage using a dummy packet in a BCMCS system,

The present invention relates to a BCMCS service apparatus and method, and more particularly, to a coverage optimization method for improving efficiency by generating and transmitting a dummy packet when a broadcast content stream is not dropped in a BCMCS system, .

BCMCS (Broadcast Multicast Service) is a standardization work in 3GPP2. It is a service that provides a link to a large number of users for the purpose of multimedia data transmission. It can eliminate unnecessary repetitive transmission of the same information on a wireless network . The BCMCS defines the multimedia broadcasting service in the CDMA band.

As BCMCS means, it can be divided into BCS (Broadcast Service) and MCS (Multicast Service). BCS is a service for a specific region, and MCS is a service for a subscribed user.

There is a method of monitoring the reception ratio of the corresponding broadcast contents and monitoring a packet error value generated at each point in order to perform optimization in the coverage providing the BDMCS.

There has been a problem in that it is not possible to determine at which point of the coverage of the BDMCS that the BDMCS has occurred because the reception rate of the broadcast content only expresses the final result value when the driving test is performed in order to optimize the coverage .

In order to solve the problem of the driving test as described above, the coverage is optimized for each zone providing the BDMCS, and optimization of the coverage is performed based on the packet error value that is loged at this time.

At this time, when optimizing the coverage based on the packet error value, since the stream of broadcast contents provided by the broadcast contents providing server for providing broadcast contents is not continuous, an empty packet is included in the stream .

In other words, when the broadcast content providing server transmits the broadcast content to the terminal at a rate lower than the data transmission rate at which the broadcast content is streamed at the broadcast content providing server and the terminal is reproducing the broadcast content at a slower rate, The data transmitted from the providing server becomes an overflow state in the PDSN or the base station.

When the overflow state occurs, loss of data occurs at the wire terminal. Therefore, in order to prevent loss of data, the broadcast content providing server transmits the broadcast contents at the AN terminal with the data rate lower than the data rate processed at the AN terminal Rate.

In other words, the broadcasting contents providing server transmits the broadcasting contents to the PDSN or the BS by lowering the data transmission rate of the broadcasting contents by a predetermined ratio to solve the overflow state.

At this time, because the data rates do not coincide with each other between the broadcast content providing server and the AN terminal, an empty packet can be issued at some time during the broadcast time. The empty packet is the same as when an error occurs in a packet Lt; / RTI >

That is, the operator who optimizes the coverage has a problem that it can not determine whether a packet error occurs due to poor wireless environment or a packet error caused by the empty data stream from the broadcast contents providing server.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an apparatus and method for providing a broadcast content providing service, a packet error occurring due to poor radio environment, The present invention provides a method and system for optimizing coverage using a dummy packet in a BCMCS system capable of providing efficiency in coverage optimization by discriminating whether or not an error is caused by a dummy packet.

It is another object of the present invention to provide a broadcast content providing server, in which when the number of stored packets is equal to or greater than a predetermined number, The present invention provides a method and system for optimizing coverage using a dummy packet in a BCMCS system that can generate a dummy packet by itself and avoid error processing for an empty packet.

To this end, a method for providing coverage optimization using a dummy packet in a BCMCS system according to an aspect of the present invention includes the steps of: (a) determining a number of packets stored in a queue of a media control apparatus; ; (b) generating a dummy packet when the number of packets is equal to or greater than a predetermined number; And (c) transmitting the dummy packet to a base station.

Here, before step (a), when the broadcast time comes (z-1), transmitting a broadcast content to the media control apparatus at a broadcast content providing server may include: And (z-2) storing a packet corresponding to the broadcast content in the queue by the media control apparatus.

In the step (z-1), the broadcasting contents providing server transmits the broadcasting contents to a PDSN (Packet Data Serving Node). Generating an HDLC frame for L2 framing of an IP packet corresponding to the broadcast content in the PDSN; Transmitting the HDLC frame to the media control apparatus; And converting the HDLC frame into a packet in the media control apparatus.

In addition, the dummy packet is generated using 7 code used for a flag indicating the beginning and end of the packet in the HDLC frame.

In addition, in the step (z-1), the broadcasting contents providing server may transmit the broadcasting contents to the media control apparatus by lowering the data transmission rate by a predetermined ratio.

Meanwhile, in a broadcast multicast service (BCMCS) system according to an aspect of the present invention, A queue for storing packets corresponding to broadcast contents transmitted from the broadcast content providing server; A packet generator for generating a dummy packet when the number of packets stored in the queue is equal to or greater than a predetermined number; And a transmitter for transmitting the dummy packet to the base station.

A system for providing coverage optimization using a dummy packet in a Broadcast Multicast Service (BCMCS) system according to an aspect of the present invention includes: a PDSN (Packet Data Serving Node); A media control apparatus for converting the HDLC frame received from the PDSN into a packet and storing the packet, and generating a dummy packet when the number of stored packets is equal to or greater than a predetermined number; And a base station for receiving the packet and the dummy packet from the media control apparatus and transmitting the packet and the dummy packet to the terminal.

Herein, the base station classifies the packet and the dummy packet, and when the packet is a dummy packet, it determines that the packet is normally received, but does not include the packet, and discards the packet.

The media control apparatus may further include: a queue for storing packets corresponding to the broadcast contents transmitted from the broadcast content providing server; A packet generator for generating a dummy packet when the number of packets stored in the queue is equal to or greater than a predetermined number; And a transmitter for transmitting the dummy packet to the base station.

According to the present invention, efficiency of coverage optimization is provided by classifying whether a packet error occurred due to poor radio environment or an empty packet generated arbitrarily by a broadcast content providing server when performing a broadcast content providing service There is an effect that can be.

According to the present invention, when the number of stored packets is equal to or greater than a predetermined number in the step of converting and downloading broadcast contents downloaded from the broadcast content providing server into packets, a dummy packet is generated by itself and no error processing is performed on the empty packet There is an effect that can be done.

Further, according to the present invention, when a dummy packet is generated, 7E (ecode) is written at the beginning and end of the packet to encapsulate the packet, thereby preventing the packet from being error- It is possible to solve the inconvenience caused by error processing of the normal packet.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. In the following description, well-known functions or constructions that may unnecessarily obscure the subject matter of the present invention are not described in detail.

FIG. 1 is a block diagram illustrating a BCMCS system for performing coverage optimization using a dummy packet in 1x EV-DO according to an embodiment of the present invention. Referring to FIG.

1, a BCMCS system includes a GAN (General ATM Node) 130 including a terminal 110, a BS 120, a media control apparatus 140, a PDSN (Packet Data Servicing Node) 150, (160), and a BCMCS (180).

The base station 120 performs both a base station transmission function and a base station control function in a 1x EV-DO network and transmits packet data to the terminal 110 through a public interface (Air Interface) Allocation and release functions of the base station 110, a transmission output control function of the base station 110 with the terminal 110, a soft handoff and a hard handoff decision.

The PDSN 150 is connected to a PCF (Packet Control Function) (not shown) that supports the packet data service to the AT 110 in cooperation with the BS 120, And becomes an end node for connection with the network or another network.

In particular, the PDSN 150 computes a packet transmission delay between the BS 120 and the PCF and provides timing information thereof. In addition, the PDSN 150 receives broadcast contents for the BCMCS service from the broadcast contents providing server 180 and configures the received broadcast contents as packets.

That is, the PDSN 150 generates an HDLC frame corresponding to the broadcast content received from the broadcast content providing server 180, and transmits the generated IP packet to the media control apparatus 140.

The GAN 130 is connected to the PDSN 150 in a wired manner and receives a packet corresponding to the broadcast content received from the PDSN 150 and transmits the received packet to the media And transmits it to the control device 140.

The media control apparatus 140 converts the HDLC frame received from the PDSN 150 into a packet and stores the packet. When the number of stored packets is equal to or greater than a predetermined number, the media control apparatus 140 generates a dummy packet.

At this time, the BS 120 receives the packet and the dummy packet from the media control apparatus 140, and transmits the packet and the dummy packet, which are received from the media control apparatus 140, to the terminal 110 It is classified.

If the dummy packet is received, it is determined that the packet is normally received but the content is not contained in the packet, and the dummy packet is discarded.

In one application, when the broadcasting contents are transmitted to the PDSN 150 as the broadcast time comes in the broadcasting contents providing server 180, the PDSN 150 converts the broadcasting contents into packets and stores the packets, It is possible to generate a dummy packet and transmit it to the base station 120 through the GAN 130 if the number of stored packets is more than a predetermined number.

In another embodiment, when the rate of the broadcast content downloaded from the broadcast content providing server 180 is faster than the broadcast rate at the AN terminal, an overflow occurs.

At this time, because the data of the broadcast content is lost due to the overflow, when the broadcast content is transmitted from the broadcast content providing server 180 to the AN at an AN level, about 5% And transmits the broadcast content with a margin of a predetermined time.

That is, the broadcasting contents provision server 180 randomly generates a dummy packet to match the data rate between the broadcasting contents provision server 180 and the AN terminal and transmits the dummy packet to the media control apparatus 140.

Referring to Fig. 2, a schematic internal block diagram of the media control apparatus of Fig. 1 will be described.

The media control apparatus 140 includes a queue 142 for storing a packet corresponding to the broadcast content transmitted from the broadcast content providing server 180; A packet generator 146 for generating a dummy packet when the number of packets stored in the queue is equal to or greater than a predetermined number; And a transmission unit 148 for transmitting the dummy packet to the base station.

The broadcast content transmitted from the broadcast content providing server 180 is stored in the queue 142 of the media control apparatus 140 as a packet.

The media control apparatus 140 further includes an operation unit 144 for counting the number of packets stored in the queue 142. When the counted number of packets is greater than a predetermined number as a result of counting the number of packets in the operation unit, And sends a control signal to the control unit 146 to generate a dummy packet.

The dummy packet is generated using 7E (7ecode) used for a flag indicating the beginning and end of the packet.

Hereinafter, a method for performing coverage optimization using a dummy packet in 1x EV-DO according to an embodiment of the present invention will be described with reference to FIG.

A method of providing coverage optimization using a dummy packet in a BCMCS (Broadcast Multicast Service) system. When a broadcast time comes, the broadcast content providing server 180 transmits broadcast content to the media control apparatus 140.

In other words, when the broadcast content providing server 180 transmits the broadcast content to a PDSN 150, the PDSN 150 transmits an IP packet corresponding to the broadcast content to an HDLC frame (S310).

The PDSN 150 transmits the HDLC frame to the media control apparatus 140, and the media control apparatus 140 converts the HDLC frame into a packet and stores the converted packet in steps S320, S330, and S340.

 After the media control apparatus 140 stores a packet corresponding to the broadcast content in the queue 142, the media control apparatus 140 counts the number of packets stored in the queue in operation S350.

If the number of packets is less than the predetermined number, the packet stored in the queue is sequentially transmitted to the base station 120 (S360).

However, if it is determined in step S350 that the number of packets stored in the queue is equal to or greater than a predetermined number, the media control apparatus 140 generates a dummy packet and transmits the generated dummy packet to the base station 120 (S370 , S380).

The dummy packet is generated using 7ecode used for a flag indicating the beginning and end of the packet in the HDLC frame.

In addition, the BS analyzes the dummy packet, determines that the packet is received normally, but does not contain the packet, and discards the packet.

Although the present invention has been described in detail with reference to the preferred embodiments thereof, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. It is to be understood that the embodiments are to be considered in all respects as illustrative and not restrictive.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the present invention. .

In addition, the present invention provides efficiency in coverage optimization by distinguishing whether a packet error occurs due to a poor radio environment or an empty packet generated at a broadcast content providing server when performing a broadcast content providing service , When the number of stored packets is equal to or greater than a predetermined number in the step of converting the broadcast contents downloaded from the broadcast contents providing server into packets and storing the packets, it is possible to generate a dummy packet to avoid error processing on the empty packet, 7E (ecode) is written at the beginning and end of the packet to encapsulate the packet, thereby preventing the error packet from being processed by making the contents of the packet not to be received, thereby causing the coverage optimization operator to error- It is intended to solve the hassle , Because it is about to be sufficient not only the possibility of commercial or business apparently conducted in reality the invention there is industrial applicability.

1 is a block diagram illustrating a BCMCS system for performing coverage optimization using a dummy packet in 1x EV-DO according to an embodiment of the present invention;

2 is a schematic inner block diagram of a media control apparatus for performing coverage optimization using dummy packets in 1x EV-DO according to an embodiment of the present invention.

3 is a flowchart illustrating a method for performing coverage optimization using dummy packets in 1x EV-DO according to an embodiment of the present invention.

Description of the Related Art [0002]

110: terminal

120: base station

130: GAN

140: Media control device

150: PDSN

160: Authentication server

180: BCMCS content providing server

Claims (11)

A method of providing coverage optimization using dummy packets in a Broadcast Multicast Service (BCMCS) system, Generating an IP packet corresponding to the broadcast content received from the broadcast content providing server as an HDLC frame; Converting the generated HDLC frame into a packet and storing it in a queue of the media control apparatus; Counting the number of packets stored in a queue of the media control apparatus; Generating a dummy packet when the number of packets is equal to or greater than a predetermined number; And And transmitting the dummy packet to a base station. 2. The method of claim 1, wherein prior to counting the number of packets, (z-1) transmitting a broadcast content to the media control apparatus at a broadcast content providing server when a broadcast time arrives; And (z-2) the media control apparatus storing a packet corresponding to the broadcast content in the queue. 3. The method of claim 2, wherein, in the step (z-1) Transmitting the broadcast content to a PDSN (Packet Data Serving Node); Generating an HDLC frame for L2 framing of an IP packet corresponding to the broadcast content in the PDSN; Transmitting the HDLC frame to the media control apparatus; And Further comprising the step of converting the HDLC frame into a packet in the media control apparatus. 4. The method of claim 3, Wherein the header is generated using 7ecode used for a flag indicating the beginning and end of the packet in the HDLC frame. 5. The method of claim 4, wherein in step (z-1) Wherein the broadcasting contents providing server transmits the broadcasting contents to the media control apparatus by lowering the data transmission rate of the broadcasting contents by a predetermined ratio. 6. The method according to any one of claims 1 to 5, wherein, in the step of transmitting the dummy packet to the base station, Wherein the base station analyzes the dummy packet to determine that the packet is normally received but does not contain the packet, and discards the packet. An apparatus for providing optimization of coverage using a dummy packet in a Broadcast Multicast Service (BCMCS) system, A queue for storing packets corresponding to broadcast contents transmitted from the broadcast content providing server; A packet generator for generating a dummy packet when the number of packets stored in the queue is equal to or greater than a predetermined number; And And a transmitter for transmitting the dummy packet to a base station, The dummy packet includes: And generates a 7-codec used for a flag indicating the beginning and end of the packet in the HDLC frame. delete A system for providing optimization of coverage using a dummy packet in a BCMCS (Broadcast Multicast Service) system, A Packet Data Serving Node (PDSN) for generating an IP packet corresponding to the broadcast content received from the broadcast content providing server in an HDLC frame; A media control apparatus for converting the HDLC frame received from the PDSN into a packet and storing the packet, and generating a dummy packet when the number of stored packets is equal to or greater than a predetermined number; And And a base station for receiving the packet and the dummy packet from the media control apparatus and transmitting the packet and the dummy packet to the terminal. 10. The base station according to claim 9, Classifies the packet and the dummy packet, and when the packet is a dummy packet, it determines that the packet is normally received but does not contain the content, and discards the packet. 11. The media control apparatus according to claim 9 or 10, A queue for storing a packet corresponding to the broadcast content transmitted from the broadcast content providing server; A packet generator for generating a dummy packet when the number of packets stored in the queue is equal to or greater than a predetermined number; And And a transmitter for transmitting the dummy packet to the base station.

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