KR100330231B1 - Dect system for improving a call quality - Google Patents

Abstract

end. TECHNICAL FIELD The invention described in the claims pertains to a deck system.

I. SUMMARY OF THE INVENTION An object of the present invention is to provide a deck system capable of improving wireless communication quality by increasing the rate of primary transfer between a high-MAC layer and a low-MAC layer.

All. Summary of the Invention Solution of the Invention: A deck system in which a system and a base station are connected by wire, the high-MAC and the low-media access layer which perform radio resource allocation in the operation of the system. A medium access control layer (Low-MAC) is located in each of the base stations, and a physical layer, which is a wired section, is positioned above the medium access control layer to improve call quality.

la. Important Uses of the Invention: Can be used in deck systems.

Description

DECT SYSTEM FOR IMPROVING A CALL QUALITY}

The present invention relates to a deck system in accordance with the ETSI standard, and more particularly to a deck system having a hierarchical structure of a signal protocol that can improve the call quality by increasing the connection success rate of wireless calls.

DECT (Digital Enhanced Cordless Telecommunications) system is a digital wireless communication protocol standardized by the ETSI standard to provide mobile communication services to existing private switching centers (PABXs), and has four hierarchical structures used for signaling protocols. have.

FIG. 1 illustrates a schematic diagram of a general deck system, and FIG. 2 illustrates a hierarchical structure diagram used for a signal protocol in a deck system conforming to the ETSI standard. 3 illustrates a hierarchical structure diagram for explaining a radio link establishment process in the system shown in FIG. 1.

First, as shown in FIG. 1, the deck system is connected to the deck main system 100 and the base stations 200 and 300 by wire, and each of the terminals 400 has a structure for wirelessly communicating with a base station of a corresponding cell. Have Meanwhile, as shown in FIG. 2, the layer used for the signaling protocol in the deck system includes a network layer, a data link connection (DLC) layer, a medium access control (MAC) layer, and a physical layer (not shown).

As described above, the procedure of establishing a radio link in a four-layered deck system is the same as that of a general OSI 7 layer. That is, when the terminal attempts to make a call, the MMI (Man & Machine Interface) _APP layer of the terminal 400 detects the request and requests a connection to the network layer. The network layer requests the DLC layer and waits for a response. The received DLC layer requests this as a High-MAC layer and waits for a response. The requested high-MAC layer controls the low-MAC layer to establish a radio link with the low-MAC of the base station 200 according to the procedure specified in the ETSI, and then waits for a response for each layer (DLC). , Network, MMI_APP) in order to inform the establishment of the radio link.

Meanwhile, in the base station 200, the low-MAC layer converts a request from the terminal 400 into a wired section message to report to a higher hi-MAC layer, and then through the wired layers 1, 2, and 3, the deck main system 100. Inform the high-MAC layer of In order for a radio link between the MAC layers to be established, several primitives must be transmitted between the low-MAC layer and the high-MAC layer within a predetermined time (by the ETSI standard). If multiple primers are not delivered within a given time, the required radio link enters the release procedure and releases all instances of the upper layer waiting. On the other hand, when the high-MAC on the side of the deck main system is established, the upper layer DLC, the network, and the like are established in turn, and the terminal requesting call establishes a complete wireless link.

However, in the general deck system described above, since the high-MAC layer and the low-MAC layer are physically separated, the primary transfer between the two layers must be performed through the layers 1,2,3 of the wired interval. Therefore, when establishing a MAC, there is a limit in exchanging messages generated in a short time in a wireless section in real time. In general, since the base station attempts to maintain the link setup of the wireless section by driving buffering or timer, the actual connection time of the actual terminal becomes longer, and the probability of reconnection is high even if the initial connection is successful. As a result, the overall call quality is deteriorated in the deck system.

Accordingly, an object of the present invention is to provide a deck system capable of improving wireless communication quality by increasing the rate of primary transfer between the high-MAC layer and the low-MAC layer.

Another object of the present invention is to provide a deck system that can secure the reliability of the system by increasing the success rate of the wireless call.

The present invention for achieving the above object is characterized by placing the high-MAC layer and the low-MAC layer in the base station.

The present invention for achieving the above object is a system in which the base station is connected by wire to the deck system,

In the operation of the system, a high-medium access control layer (High-MAC) and a low-medium access control layer (Low-MAC), which serve to allocate radio resources, are located in each of the base stations, The layer is located above the media access control layer to improve call quality.

1 is a general DECT SYSTEM (DECT SYSTEM) configuration diagram.

2 is a hierarchical structure diagram used for a signaling protocol in a deck system conforming to the European Telecommunication Standards Institute (ETSI) standard.

3 is a hierarchical structure diagram for explaining a radio link establishment process in the system shown in FIG. 1;

4 is a hierarchical structure diagram for improving call quality in a deck system according to an embodiment of the present invention;

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

4 is a hierarchical structure diagram for improving call quality in a deck system according to an embodiment of the present invention. Hereinafter, the hierarchical structure diagram and a wireless link according to the deck system according to an embodiment of the present invention will be described with reference to FIG. The formation process will be described in detail.

First, in the deck system according to the embodiment of the present invention, the high-MAC layer and the low-MAC layer are located together in the base station 600 as shown in FIG. In addition, the deck main system 500 is connected to the base station 600 by wire, and each base station 600 has a hierarchical structure for wireless communication with the plurality of terminals 400. The MAC layer finds an appropriate physical channel and reliably transmits information through the channel to allocate radio resources in the operation of the deck system.

In the following description of the radio link establishment process, when a user attempts to make a call using the terminal 400, the MMI_APP layer of the terminal 400 detects this and requests a connection to the network layer. Then, the network layer also requests a connection to the DLC layer and waits for a response, and the high-MAC layer that receives the connection request controls the low-MAC layer to control the low-MAC and high-MAC of the base station 600 according to the procedure specified in the ETSI. After establishing a wireless link with the MS, the DLC layer, the network layer, and the MMI_APP layer waiting for a response are notified in order.

On the other hand, in the base station 600, the low-MAC layer transmits a connection request from the terminal 400 to the high-MAC layer in the same base station 600, and the high-MAC layer controls the low-MAC of the terminal 400. After establishing a low-MAC and a radio link and converting this state to a wired segment message to inform the upper layer, the DLC of the deck main system 500 through the wired segment layers 1, 2, 3 (L1, L2, L3). Inform this to the hierarchy. Then, the DLC layer of the deck main system 500 transfers it to a higher layer, so that upper instances are created so that the wireless link of the terminal is completely established.

As with the normal OSI 7 layer, the lower the peer-to-peer message delivery time, the lower the dec system layer. That is, various internal timers in the MAC layer are in the unit of several milliseconds (milisec), but in the upper layer (network, DLC), since they are mostly in the unit of seconds, there is more time than the lower layer. Therefore, in the deck system in which the deck main system and the base station are connected by wire, the wired section is located at the upper layer, and the high-MAC and low-MAC are located in one base station to increase the response speed in the MAC layer. This can lead to an improvement in quality.

As described above, the present invention has the advantage of improving the call quality of the wireless link by increasing the response speed in the MAC layer by placing the high-MAC and the low-MAC in one base station, thereby improving the reliability of the deck system. There is an advantage to be secured.

Claims (1)

In a deck system including a deck terminal and a deck main system and a plurality of base stations are connected by wire, In the operation of the deck system, a high-media access control layer (High-MAC) and a low-media access control layer (Low-MAC), which serve to allocate radio resources, are located together in each of the base stations. If the low-MAC layer transfers the connection request from the deck terminal to the high-MAC layer by placing a physical layer above the medium access control layer, the high-MAC layer controls the low-MAC layer to control the deck terminal. And establishing a wireless link with the MAC layer of the MAC layer and converting the wireless link into a wired interval message and transmitting the message to the deck main system.