KR20060038729A - Method and system for providing hard handoff between portable internet network and other networks by using border repeater - Google Patents

Abstract

The present invention relates to a method and system for providing hard handoff between a portable Internet network and another type of network using a border repeater.

The present invention relates to a personal subscriber station moving from a serving-side communication network to a target-side communication network using a border repeater installed at a boundary area between a portable Internet network and another type of network. A method for providing a hard handoff, comprising: (a) when the personal subscriber station moves from the jurisdiction of the serving-side communication network to the jurisdiction of the target-side communication network through the jurisdiction of the border repeater; The serving side base station and the border repeater starting communication with the border repeater without terminating communication with a serving base station of the serving side communication network in a boundary area between the jurisdiction area of the serving side communication network and the border repeater; Performing a soft handoff of the liver; And (b) when the personal subscriber station moves to the border area between the jurisdiction area of the border repeater and the jurisdiction area of the target side communication network, terminates communication with the serving side base station and the target side base station of the target side communication network. Performing hard handoff between the serving base station and the target side base station, which initiates communication, providing a hard handoff between the portable Internet network and another type of network using a border repeater. And a system for performing this.

Hard Handoff, Soft Handoff, Border Repeater, Personal Subscriber Terminal, Mobile Internet, Base Station, RAS

Description

Method and System for Providing Hard Handoff between Portable Internet Network and Other Networks by Using Border Repeater}

1 is a diagram schematically illustrating a network configuration for performing a conventional intergenerational hard handoff;

2 is a block diagram schematically illustrating a system for providing a hard handoff between a portable Internet network and another type of network using a border repeater according to a preferred embodiment of the present invention;

3 is a network diagram illustrating a process of providing a hard handoff between a portable Internet network and another type of network using a border repeater according to a preferred embodiment of the present invention;

4 is a flowchart schematically illustrating a process of providing a hard handoff between a portable Internet network and another type of network using a border repeater according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

200: personal subscriber station 210: CDMA-2000 RAN

211: BTS 212: BSC

213: PCF 220: DCN

221: PDSN 222: HA

223: AAA Server 230: Mobile Internet RAN

231: RAS 232: ACR

240: Internet 251: Border Repeater

The present invention relates to a method and a system for providing a hard handoff between a portable Internet (PI) or a different type of network using a border repeater. More specifically, by installing a border repeater that configures an overlay environment by simultaneously serving signals provided by each network in the boundary region of the mobile Internet network and other types of networks, a hard handoff buffer region between both networks is established. The present invention relates to a method and system for providing an efficient hard handoff to a personal subscriber station moving from a serving-side communication network to a target-side communication network.

Due to the development of mobile communication technology, the services provided by the Code Division Multiple Access (CDMA) mobile communication system are not only voice services but also remote data transmission such as circuit data and packet data. It is evolving into a MEDIA communication service.

In general, a CDMA mobile communication system includes a personal subscriber station, a base station (BS), and a mobile switching center (MSC). In addition, the wireless base station includes a base station controller (BSC), a base transceiver station (BTS), a repeater (Repeater) and the like, and the mobile switching center is a home location register (HLR), visitor location It consists of a visitor location register (VLR).

One of the greatest features of the mobile communication system configured as described above is to ensure the mobility of the personal subscriber station, and the location registration and handoff technologies are developed to ensure the mobility of the personal subscriber station. It became.

In this case, the location registration allows the personal subscriber station to frequently inform the mobile switching center of information such as its location (owned wireless base station) and status, thereby reducing the load of the mobile communication system and increasing the reliability of the personal subscriber station incoming call. Say work. Various information transmitted from the personal subscriber station to the mobile switching center are stored and managed in the home location register or the visitor location register of the mobile switching center.

In addition, handoff refers to a technology for switching the call path between the personal subscriber station and the base station so that the call can be maintained continuously even if the personal subscriber station leaves the service area of the base station or sector currently receiving the service. .

Such handoff types include soft handoff, softer handoff, and hard handoff.

'Soft handoff' means that a personal subscriber station connects to a new base station and communicates with both base stations at the same time before disconnecting from the current base station. As the signal from the new base station becomes larger than the signal from the current base station, This method releases the connection with the base station. Therefore, since the new base station and channel need to be set up, it takes a lot of time for handoff processing, and channel resources of the two base stations are used at the same time.

Softer handoff refers to handoff that occurs when a personal subscriber station crosses between sectors within the same base station. That is, since the change of the channel element is unnecessary at the softener handoff, the time required for handoff processing can be reduced, and the waste of channel resources can be reduced.

On the other hand, 'hard handoff' is a method of instantaneous disconnection when moving between base stations during a call, and reconnects the call to the next base station when the caller does not feel the interruption of the call. This hard handoff has a problem of lower success rate than the soft handoff method because it involves instantaneous disconnection of the call.

On the other hand, in recent years, with the development of information and communication, IMT-2000 (International Mobile Telecommunication 2000), which is a third generation mobile communication system standardized by ITU-R (for example, CDMA2000 1X, 3X, EV-DO, WCDMA (WideBand CDMA) ) And the like are commercially available. IMT-2000 is a CDMA 2000 1X, 3X, EV-DO, WCDMA (WideBand CDMA), etc., which is used in IS-95A and IS-95B networks by using the IS-95C network that has evolved from the existing IS-95A and IS-95B networks. It is a service that can provide wireless Internet at a transmission speed of up to 144 Kbps, much faster than the supported data transmission speed of 14.4 Kbps or 56 Kbps. In particular, by using IMT-2000 service, it is possible to provide various multimedia services (AOD, VOD, etc.) at higher speed as well as improving existing voice and WAP service quality.

Currently, the wireless Internet technology used worldwide includes a third generation cellular system based on the aforementioned mobile telephone network and a wireless local area network (WLAN) based on IP-based packet transmission.

Existing cellular systems support high mobility and handoff, guarantee data rates required for voice calls, and additionally support packet data services. However, the existing mobile communication system has a high base station construction cost and high wireless Internet usage fee, and a small screen size of the mobile communication terminal has limited content that can be used, and provides sufficient transmission speed for packet data service. There is a limit to guarantee.

On the other hand, WLAN guarantees superior data transmission rate compared to cellular systems, but there is a problem in mobility due to radio interference and limitation in provision of public service due to problems such as narrow coverage.

In this regard, a portable internet service system, which has a transmission speed comparable to that of a WLAN, supports cellular system mobility and handoff, and provides high-speed wireless Internet service at a low price.

The portable Internet service, referred to as the 3.5 generation, uses various types of portable personal subscriber terminals such as laptops, PDAs, and handheld PCs to access the Internet in indoor and outdoor stationary environments and mobile environments at walking speeds and low to medium speeds. Information and content available services. In addition, it provides mobility of 60 km / h per hour, and the downlink transmission rate is 24.8 Mbps, but the uplink transmission rate is 5.2 Mbps, which is an IP (Internet Protocol) based wireless data system having up and down asymmetric transmission characteristics.

The portable Internet system uses the 2.3 GHz frequency band, and is orthogonal frequency division multiple access (OFDM) / time division multiple access (TDMA) and time division duplexing (TDD), which is a next-generation core technology. Division Duplexing). In this case, OFDMA / TDMA is a multiple access scheme similar to TDMA, in which all subcarriers spread over the entire bandwidth are allocated to one user for a predetermined time and to another user for the next predetermined time. In addition, standardization work is currently underway to employ technologies such as Adaptive Modulation Coding (AMC), Multi Input Multi Output (MIMO), and Smart Antenna to efficiently operate radio resources.

As the new system is introduced, the interworking function between the existing network and the new network is needed. Since users require a variety of services that are not limited to the type of network, the construction of the interlocking network to meet the needs of these users is now visible. The research on 3G mobile communication and WLAN is most actively conducted on such interworking network construction. However, these networks have evolved independently and use different specifications and standards. Therefore, in order to interwork each network, various matters such as architecture, protocol structure, mobility, quality of service, authentication, security, and billing must be considered, and modification and supplementation of each matter must be accompanied.

On the other hand, the present CDMA communication system coexists with the IS-95C or CDMA-2000 1X, WCDMA 2.5 generation (2.5G, hereinafter referred to as '1X') system having a data transfer rate of up to 307 Kbps and the aforementioned portable Internet. Will service.

However, the 1X network and the portable Internet network have a difference in coverage. That is, there may be an area where only 1X single network exists, there may be an area where 1X network and portable internet network coexist, and there may be an area where only mobile internet network exists. Therefore, handoff between 1X network and portable Internet network is essential.

Soft handoff between the existing 1X network and the mobile Internet network for packet calls is difficult to implement due to the different protocols in the system, and it is difficult to exclude hard handoff factors due to changes in radio configuration and frequency allocation in the border area. Even if the soft handoff is implemented, the quality improvement effect cannot be expected. Therefore, it is necessary to use the intergenerational hard handoff that has been implemented and realized.

However, the inter-generational hard handoff has a higher failure rate than the soft handoff since the base station resources are occupied by the target side after releasing the base station resources of the serving side, and in particular, the handoff from the serving side to the target side in the hard handoff boundary region. After the ping pong phenomenon which occurs backwards to the serving side again occurs, there is a problem that the quality deterioration occurs.

1 is a diagram schematically illustrating a network configuration for performing a conventional intergenerational hard handoff.

Referring to FIG. 1, the personal subscriber station 100 supporting both the existing network 112 and the portable internet network 122 is connected to the existing network 112 in a boundary area between the existing network 112 and the portable internet network 122. After tuning to the base station 110, the mobile Internet network 122 moves toward the radio access station (RAS) 120 of the mobile Internet network 122 increases, the RAS 120 of the mobile Internet network 122 Holding a beacon (Beacon) hard handoff occurs between the base station 110 of the existing network 112 and the RAS 120 of the portable Internet network 122. Since the base station 110 power of the existing network 112 is increased again, the personal subscriber station 100 catches the beacon of the base station 110 of the existing network 112, so it returns to the base station 110 of the existing network 112 again. A backward hard handoff is attempted. If this operation is repeated, a ping pong phenomenon occurs at the boundary between the existing network 112 and the portable internet network 122, causing a problem of deterioration in quality. When the ping-pong phenomenon of the hard handoff occurs, the load of the mobile communication system increases, the call is disconnected due to frequent handoffs, and the control signals between the exchanges are lost, thereby increasing the probability that the communication path is disconnected or released. have.

In order to solve this problem, the present invention, an overlay environment is configured by simultaneously serving signals provided by each network in the boundary region of a portable Internet network (PI: Portable Internet or WiBro: Wireless Broadband) and other types of networks. By installing a Border Repeater, a hard handoff buffer area is established between the two networks, and an effective hard-handoff is performed for a personal subscriber station moving from a serving communication network to a target communication network. An object of the present invention is to provide a method and system.

In order to achieve the above object, the present invention provides a target side communication network in a serving side communication network using a border repeater installed at a boundary area between a portable Internet network and another type of network. A method of providing a hard handoff to a personal subscriber station moving to the terminal, the method comprising: (a) the personal subscriber station of the target side communication network from the serving area of the serving-side communication network When moving toward a jurisdiction area, starting communication with the border repeater without terminating communication between a serving base station of the serving communication network at a boundary area between the jurisdiction area of the serving communication network and the jurisdiction of the border repeater; Performing a soft handoff between a serving base station and the border repeater; And (b) when the personal subscriber station moves to the border area between the jurisdiction area of the border repeater and the jurisdiction area of the target side communication network, terminates communication with the serving side base station and the target side base station of the target side communication network. Performing a hard handoff between the serving base station and the target side base station, which initiates communication, to provide hard handoff between the portable Internet network and another type of network using a border repeater. It is characterized by providing a method.

In addition, according to another object of the present invention, in the system for providing a hard handoff (Hard Handoff) to a personal subscriber station moving from a serving side communication network to a target side communication network, the serving side communication network and the A border repeater installed at a boundary area of a target side communication network and simultaneously processing a signal provided by the serving side communication network and a signal provided by the target side communication network; When the personal subscriber station moves from the jurisdiction of the serving side communication network to the jurisdiction of the target side communication network through the jurisdiction of the border repeater, the boundary area of the jurisdiction of the serving side communication network and the jurisdiction of the border repeater A serving side base station performing a soft handoff in which communication with the border repeater is initiated without ending communication with the serving side communication network in a; And when the personal subscriber station moves to the border area between the jurisdiction area of the border repeater and the jurisdiction area of the target side communication network, terminates communication with the serving base station and starts communication with the target side base station of the target side communication network. A serving side controller and a target side controller configured to perform a hard handoff between the serving side base station and the target side base station, between the portable Internet network and another type of network. A system for providing hard handoff is provided.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are designated as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

2 is a block diagram schematically illustrating a system for providing a hard handoff between a portable Internet network and another type of network using a border repeater according to a preferred embodiment of the present invention.

As shown in FIG. 2, a network structure for providing hard handoff between a portable Internet network and another type of network using a border repeater according to a preferred embodiment of the present invention is an existing CDMA-2000 wireless access network (RAN: Radio Access). Network (210), Data Communications Network (DCN: Data Communications Network) 220 and the portable Internet (PI: Portable Network or WiBro: Wireless Broadband) may include a wireless access network 230, and the like. A base transceiver station (BTS) 211, a base station controller (BSC) 212, and a packet controller (PCF) are components of the existing CDMA-2000 wireless access network 210. The data communication network 220 may include a packet data serving node (PDSN) 221, a home agent (HA) 222, and an authentication server (AAA server). , An accounting server, hereinafter referred to as an 'AAA server' 223), and a radio access station (RAS) as a component of the portable Internet wireless access network 230. 231, an access control router (ACR) 232, which is an access control router that accommodates a plurality of RASs 231, may be included.

The present invention provides a system for providing a hard handoff function between a portable Internet network and another network, and a hard handoff method using the same. Here, other types of networks include, but are not limited to, a Code Division Multiple Access (CDMA) 2000 network, a Global System for Mobile (GSM) network, or a Wideband CDMA (W-CDMA) network. In this specification, for convenience of explanation and understanding, another type of network will be described as a CDMA 2000 network, but it is obvious that the present invention is not limited thereto.

The personal subscriber station 200 according to the preferred embodiment of the present invention not only performs telephone call and location registration wirelessly with respect to the base station 211 and the Radio Access Station (RAS) 231, but also with the preferred embodiment of the present invention. A wireless communication terminal for measuring and transmitting electric field strength for soft handoff and hard handoff. The personal subscriber station 200 according to the preferred embodiment of the present invention is a terminal that supports all communication in different networks to perform handoff.

Meanwhile, the personal subscriber station 200 according to the preferred embodiment of the present invention may be a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a hand-held PC, or a global system for GSM. Mobile phones, wideband CDMA (W-CDMA) phones, CDMA-2000 phones, and Mobile Broadband System (MBS) phones.

The base station 211 according to the preferred embodiment of the present invention is a network endpoint device that directly interworks with the personal subscriber station 200 by performing baseband signal processing, wired / wireless conversion, and transmission and reception of a wireless signal. The base station 211 according to the preferred embodiment of the present invention is arranged in each cell unit and transmits a call request generated from the personal subscriber station 200 to the base station controller 212 or in a cell area in which it manages. Location registration is performed by identifying the location of the existing personal subscriber station 200. In addition, the base station 211 functions to maintain a wireless communication call or communication path with respect to the personal subscriber station 200.

The base station controller 212 according to the preferred embodiment of the present invention controls the base station 211, and assigns and releases radio channels to the personal subscriber station 200, and transmits the transmissions of the personal subscriber station 200 and the base station 211. Control, Intercell Soft Handoff and Hard Handoff Decision, Transcoding and Vocoding, Global Positioning System (GPS) Clock Distribution, Operation and Maintenance for Base Station 211 Perform functions such as maintenance.

Meanwhile, in the case where the existing network is synchronous, the base station 211 will be a base transceiver station (BTS), and the base station controller 212 will be a base station controller (BSC). In the asynchronous mode, the base station 211 is an RTS (Radio). The transceiver subsystem, the base station controller 212, will be a Radio Network Controller (RNC).

The PCF 213 according to the preferred embodiment of the present invention is connected to the base station controller 212 and the PDSN 221 to perform a function of setting / maintaining / releasing a connection with the PDSN 221, and the base station controller 212. It requests radio resource (Radio Resource) allocation for packet data transmission and collects billing information and transmits it to PDSN 221. Also, the buffering function and the state management function of the personal subscriber station 200 are performed until the packet data received from the PDSN 221 is transmitted to the personal subscriber station 200.

On the other hand, the base station controller 212 and the PCF 213 according to a preferred embodiment of the present invention, when a handoff call arrives from the portable Internet wireless access network 230, utilizes the access information of the portable Internet wireless access network 230, ACR ( It is necessary to look up the IP for 232 to obtain IP information or to transmit the access information of the portable Internet wireless access network 230 to the PDSN 221.

The PDSN 221 according to the preferred embodiment of the present invention distinguishes the previous network classification function for the personal subscriber station 200, the CDMA 2000 call and the mobile Internet call, and performs PPP (Point to Point Protocol) processing only for the CDMA 2000 call. It performs a function and a DHCP server function for performing IP address assignment for the personal subscriber station (200).

The HA 222 according to the preferred embodiment of the present invention performs routing for transmitting a packet from an external packet data service server such as the Internet 230, and the AAA server 223 works in conjunction with the RAS 231. Charge the packet data used in the personal subscriber station 200, and authenticates the connection from the personal subscriber station 200.

The RAS 231 according to the preferred embodiment of the present invention transmits data received from the ACR 232 to the personal subscriber station 200 wirelessly, and includes a low power RF / IF module and controller function, OFDMA / TDD packet scheduling, and the like. It has channel multiplexing function, MAC frame variable control function according to service characteristics and radio environment, 50 Mbps high-speed traffic real-time control function, handoff function and so on.

The ACR 232 according to the preferred embodiment of the present invention is an access control router that accommodates a plurality of RAS 231, a handoff control function between the RAS 231, a handoff function between the ACR 232, a packet routing function, the Internet. It has a connection function and the like and is connected to an IP network.

When the base station 211 or the RAS 231 according to the preferred embodiment of the present invention operates as the serving base station, the personal subscriber station 200 passes through the jurisdiction of the border repeater 251 in the jurisdiction of the serving side communication network. When moving toward the jurisdiction of the target-side communication network, communication with the border repeater 251 is started at the boundary between the jurisdiction of the serving-side communication network and the jurisdiction of the border-relay 251 without ending communication with the serving-side communication network. Soft handoff is performed. Here, the serving side refers to the system before the personal subscriber station 200 is handed off, and the target side refers to the system after the personal subscriber station 200 is handed off.

In addition, when the base station 211 or the RAS 231 according to the preferred embodiment of the present invention operates as the target side base station, the personal subscriber station 200 includes the jurisdiction area of the border repeater 251 and the jurisdiction area of the target side communication network. In the case of reverse movement from the boundary area of the serving side communication network to the boundary area of the jurisdiction area of the serving side communication network and the border repeater 251, communication with the border repeater 251 is not completed without ending communication with the target side communication network. A soft handoff will be performed. In addition, even when the personal subscriber station 200 stops at the boundary area between the jurisdiction area of the border repeater 251 and the jurisdiction area of the target side communication network, it communicates with the border repeater 251 without ending communication with the target base station. Perform a soft handoff to start.

On the other hand, in the base station controller 212 or the ACR 232 according to the preferred embodiment of the present invention, the personal subscriber station 200 has moved to the boundary area between the jurisdiction area of the border repeater 251 and the jurisdiction area of the target side communication network. When the control unit terminates the communication with the serving base station and performs a hard handoff between the serving base station and the target base station starting communication with the target base station.

The border repeater 251 according to the preferred embodiment of the present invention is installed and operated in the boundary region of the serving-side communication network and the target-side communication network. The border repeater 251 configures an overlay environment by simultaneously servicing a signal provided by the serving-side communication network and a signal provided by the target-side communication network. That is, the border repeater 251 according to the preferred embodiment of the present invention simultaneously provides coverage of the serving base station and the target side base station at the boundary area between the serving side communication network and the target side communication network, thereby creating an intergenerational hard handoff buffer region. It becomes.

The border repeater 251 according to the preferred embodiment of the present invention, when the personal subscriber station 200 is stopped in the border area between the jurisdiction area of the border repeater 251 and the jurisdiction area of the target side communication network, Soft handoff is performed between the target side base station and the border repeater 251 to start communication with the border repeater 251 without ending communication of the.

In addition, since the border repeater 251 according to a preferred embodiment of the present invention is introduced for efficient handoff between the serving-side communication network and the target-side communication network, letters or letters and numbers of the alphabet to enable the identification of the radio beacon station. Does not provide a beacon signal, which is a code designating a radio beacon station.

3 is a network diagram illustrating a process of providing a hard handoff between a portable Internet network and another type of network using a border repeater according to a preferred embodiment of the present invention.

As shown in FIG. 3, when the personal subscriber station 200 synchronizes with the existing network base station 211 and moves toward the portable Internet network, the base station 211 and the border repeater 251 of the existing network Soft ( er) The handoff is followed by a generational hard handoff at point (b). Then, when the personal subscriber station 200 moves little by little toward the base station 211 of the existing network in the opposite direction or stops at the point (B), in the preferred embodiment of the present invention, the backward hard generation between the backward generations into the existing network. Provides stable service through soft (er) handoff of RAS 231 and border repeater 251 mobile internet network in border repeater 251 buffer area until point (a) before the point. It is possible to prevent the ping pong.

On the other hand, when the personal subscriber station 200 synchronizes with the portable Internet network RAS 231 and moves toward the existing network, a soft (er) handoff of the mobile Internet network forces of the base station 211 and the border repeater 251 of the existing network is performed. Generational hard handoffs occur at branch offices. Then, when the terminal moves slightly toward the RAS 231 in the opposite direction or stops at the point (a), in the preferred embodiment of the present invention, the mobile Internet network does not perform reverse generation inter-generation hard handoff, and (b) Before the point, the base station 211 and the border repeater 251 in the buffer area of the border repeater 251 may provide stable service through Soft (er) handoff of existing network forces and prevent ping-pong.

4 is a flowchart schematically illustrating a process of providing a hard handoff between a portable Internet network and another type of network using a border repeater according to a preferred embodiment of the present invention.

Hereinafter, for convenience of description, the conventional network 210 will be described as a serving side and the portable Internet network 230 as a target side in FIGS. 2 and 3.

First, the personal subscriber station 200 moves to the mobile Internet network 230 after tuning to the base station 211 of the existing network 210 (S400). When the personal subscriber station 200 moves to the boundary area between the jurisdiction area 210 of the existing network and the jurisdiction area 250 of the border repeater 251 (S402), that is, to the point in FIG. If the existing base station 211 and the border repeater 251, the soft (or softer) handoff of the existing forces are made (S404).

When the personal subscriber station 200 continues to move to a point (b) which is a boundary point between the jurisdiction area 250 of the border repeater 251 and the jurisdiction area 230 of the portable Internet network RAS 231 (S406). The base station controller 212 and the ACR 232 control to perform a hard handoff between the base station 211 of the existing network and the RAS 231 of the portable Internet network (S408).

Then, the personal subscriber station 200 moves slightly toward the base station 211 of the existing network in the opposite direction, or the jurisdiction area 230 of the border repeater 251 and the RAS 231 of the portable Internet network. When the station stops at the boundary point (b) (S410), the base station controller 212 and the RAS 231 do not perform a backward intergenerational hard handoff to the existing network. Up to now, it is possible to provide stable service through soft (or soft) handoff between the mobile internet forces of the RAS 231 and the border repeater 251 in the border relay 251 buffer area (S412). .

As described above, the mobile network 230 is serving as the target side, and the existing network 210 is described as the target side. However, the opposite case is the case where the existing network 210 is the target side and the mobile internet network 230 is the serving side. It is clear that the handoff processing procedure will be performed in the same manner, but only in the same manner.

The above description is merely illustrative of the present invention, and those skilled in the art to which the present invention pertains may various modifications without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed herein are not intended to limit the present invention but to describe the present invention, and the spirit and scope of the present invention are not limited by these embodiments. It is intended that the scope of the invention be interpreted by the following claims, and that all descriptions within the scope equivalent thereto shall be construed as being included in the scope of the present invention.

As described above, according to the present invention, a border repeater capable of simultaneously providing communication with both base stations in a boundary area between a portable Internet network and another type of network is provided to create a hard handoff buffer area between generations. It prevents the ping-pong phenomenon, which is the biggest problem of hard handoff, and improves the call quality.

Claims (23)

Hard handoff to a personal subscriber station moving from a serving-side communication network to a target-side communication network using a border repeater installed at a boundary between a portable Internet network and another type of network. In the method of providing a hard handoff, (a) when the personal subscriber station moves from the jurisdiction of the serving side communication network to the jurisdiction of the target side communication network through the jurisdiction of the border repeater, the jurisdiction of the serving side communication network and the jurisdiction of the border repeater Performing soft handoff between the serving base station and the border repeater, initiating communication with the border repeater without terminating communication with a serving base station in the serving communication network at an edge region of the serving network; And (b) when the personal subscriber station moves to the boundary area between the jurisdiction area of the border repeater and the jurisdiction area of the target side communication network, terminates communication with the serving base station and communicates with the target side base station of the target side communication network. Performing hard handoff between the serving base station and the target base station; A method for providing hard handoff between a mobile internet network and another type of network using a border repeater comprising a. The method of claim 1, (c) when the personal subscriber station moves backward from the boundary area between the jurisdiction area of the border repeater and the jurisdiction area of the target side communication network to the serving side communication network, the jurisdiction area of the serving side communication network and the jurisdiction area of the border repeater; Performing soft handoff between the target side base station and the border repeater, starting communication with the border repeater without terminating communication with the target side base station to a border region of? And providing a hard handoff between the mobile internet network and another type of network by using a border repeater. The method according to claim 1 or 2, (d) when the personal subscriber station is stopped at a boundary area between the jurisdiction area of the border repeater and the jurisdiction area of the target side communication network, communication with the border repeater is started without ending communication with the target base station; Performing a soft handoff between the target base station and the border repeater And providing a hard handoff between the mobile internet network and another type of network by using a border repeater. The method according to any one of claims 1 to 3, The serving-side communication network is a CDMA 2000 1X network, a WCDMA network or an IS-95 A / B (2G) network, and the target-side communication network is the portable Internet network. How to provide hard handoff between networks. The method of claim 4, wherein The serving base station is a base transceiver station (BTS) or a radio transceiver subsystem (RTS), and the target base station is a radio access station (RAS). How to provide a hard handoff. The method of claim 4, wherein The hard handoff is processed by a base station controller (BSC) or radio network controller (RNC) of the serving-side communication network and an access control router (ACR) of the target-side communication network. A method for providing hard handoff between a mobile Internet network and another type of network using a repeater. The method according to any one of claims 1 to 3, The serving-side communication network is the portable Internet network, and the target-side communication network is a CDMA 2000 1X network, a WCDMA network, or an IS-95 A / B (2G) network. How to provide hard handoff between networks. The method of claim 7, wherein The serving base station is a RAS (Radio Access Station), the target base station is a BTS (Base Transceiver Station) or RTS (Radio Transceiver Subsystem) using a border repeater between the portable Internet network and other types of networks How to provide a hard handoff. The method of claim 7, wherein The hard handoff is processed by an access control router (ACR) of the serving-side communication network and a base station controller (BSC) or a radio network controller (RNC) of the target-side communication network. A method for providing hard handoff between a mobile Internet network and another type of network using a repeater. The method according to any one of claims 1 to 3, The border repeater simultaneously processes a signal provided by the serving-side communication network and a signal provided by the target-side communication network to configure an overlay environment. How to provide a hard handoff of the liver. The method according to any one of claims 1 to 3, The border repeater does not provide a beacon signal (Beacon Signal) using a border repeater, a method for providing a hard handoff between the portable Internet network and other types of networks. A system for providing a hard handoff to a personal subscriber station moving from a serving side communication network to a target side communication network, A border repeater installed at a boundary area between the serving-side communication network and the target-side communication network and simultaneously processing a signal provided by the serving-side communication network and a signal provided by the target-side communication network; When the personal subscriber station moves from the jurisdiction of the serving side communication network to the jurisdiction of the target side communication network through the jurisdiction of the border repeater, the boundary area of the jurisdiction of the serving side communication network and the jurisdiction of the border repeater A serving side base station performing a soft handoff in which communication with the border repeater is initiated without ending communication with the serving side communication network in a; And When the personal subscriber station moves to the border area between the jurisdiction area of the border repeater and the jurisdiction area of the target side communication network, it terminates the communication with the serving base station and starts communication with the target side base station of the target side communication network. A serving side controller and a target side controller controlling to perform a hard handoff between the serving side base station and the target side base station A system for providing hard handoff between a portable Internet network and another type of network by using a border repeater comprising a. The method of claim 12, When the personal subscriber station reversely moves from the boundary area between the jurisdiction area of the border repeater and the jurisdiction area of the target side communication network to the serving side communication network, the boundary area between the jurisdiction area of the serving side communication network and the jurisdiction area of the border repeater Until the target side base station performing a soft handoff to start communication with the border repeater without ending communication with the target side communication network A system for providing hard handoff between a mobile Internet network and another type of network by using a border repeater, characterized in that it further comprises. The method according to claim 12 or 13, In the target base station and the border repeater, when the personal subscriber station is stopped in the border area between the jurisdiction area of the border repeater and the jurisdiction area of the target side communication network, the communication with the target side base station is not terminated. And performing a soft handoff between the target side base station and the border repeater, which initiates communication with a border repeater. The method according to any one of claims 12 to 14, The serving side communication network is a CDMA 2000 1X network, a WCDMA network or an IS-95 A / B (2G) network, and the target side communication network is the portable Internet network. A system that provides hard handoff between networks. The method of claim 15, The serving base station is a base transceiver station (BTS) or a radio transceiver subsystem (RTS), and the target base station is a radio access station (RAS). System providing hard handoff. The method of claim 15, The hard handoff is processed by a base station controller (BSC) or radio network controller (RNC) of the serving-side communication network and an access control router (ACR) of the target-side communication network. A system that provides a hard handoff between a mobile Internet network and another type of network using a repeater. The method according to any one of claims 12 to 14, The serving-side communication network is the portable Internet network, and the target-side communication network is a CDMA 2000 1X network, a WCDMA network, or an IS-95 A / B (2G) network. A system that provides hard handoff between networks. The method of claim 18, The serving base station is a RAS (Radio Access Station), the target base station is a BTS (Base Transceiver Station) or RTS (Radio Transceiver Subsystem) using a border repeater between the portable Internet network and other types of networks System providing hard handoff. The method of claim 18, The hard handoff is processed by an access control router (ACR) of the serving-side communication network and a base station controller (BSC) or a radio network controller (RNC) of the target-side communication network. A system that provides a hard handoff between a mobile Internet network and another type of network using a repeater. The method according to any one of claims 12 to 14, The border repeater provides a hard handoff between the portable Internet network and another type of network using a border repeater, which comprises an overlay environment by simultaneously processing the serving side network signal and the target side network signal. System. The method according to any one of claims 12 to 14, The border repeater does not provide a beacon signal (Beacon Signal) system for providing a hard handoff between the portable Internet network and other types of networks using a border repeater. The method of claim 12, A personal subscriber station which performs telephone call and location registration wirelessly in the serving-side communication network and the target-side communication network, and measures and transmits electric field strength for the soft handoff and the hard handoff. The system for providing a hard handoff between the mobile Internet network and other types of networks using a border repeater further comprising.

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