FI103466B - Method for extending the mobility of a wireless terminal equipment - Google Patents

Description

103466

METHOD FOR EXTENSION OF MOBILE WIRELESS TERMINAL DEVICE

The present invention relates to a method 5 for expanding the mobility of a wireless subscriber terminal as defined in the preamble of claim 1. The invention further relates to a system as defined in the preamble of claim 9 for expanding the mobility of a wireless subscriber terminal.

10 In WLAN, Wireless

Local Loop) is connected to the access node by radio connection. Between the terminal and the subscriber network element there is a base station, by means of which the voice signals from the terminal to the base station are transmitted via the access network element further to the public telephone network and vice versa. The Ti-wide network element is connected to the PBX using the V5.1 or V5.2 protocol.

Open interfaces (V5.1 and V5.2) between the access node and the local exchange 20 are defined in the ETSI 300 324 and ETS 300 347 series standards of the European Telecommunications and Standard Institute (ETSI). V5 interfaces allow subscribers in a physically separate access network, which may be wired or wireless, to be connected using a standard PBX interface. The dynamic hub connection V5.2 according to ETS 300 347-: 1 and 347-2 consists of one or more (1 to 16) PCM (Pulse Code Modulation) wires. One PCM cable has a total of 32 channels of its 32 channels, each with a speed of 64 kbit / s • · · M, or 2048 kbit / s in total. The V5.2 interface supports analog • · · *. Such as telephones operating in a public telephone network, digital *? **: basic, such as ISDN (Integrated Services Digital ·: ·· Network) basic and system interfaces, and other 35 analog or digital semi-fixed terminal devices.

2,103,446

In the current wireless system, expanding space and terminal mobility is not possible, or at least very difficult. When a WLL-5 fixed line subscriber is connected to a terminal, and when a subscriber wants to occasionally be reachable from outside of his home base station or home cell, the subscriber will have to rent, purchase or borrow a GSM operator's mobile phone. In more advanced systems, a subscriber terminal, such as a mobile station, includes two Subscriber Identity Modules (SIM), one defined to operate in a GSM network and the other in a WLL environment for a fixed telephone network. The subscriber then selects which network to use from his terminal. It is also possible that, in a system based on GSM / DCS technology, the subscriber terminal incorporates a technology based on both systems. Also in this system, the subscriber selects the network to use from his subscriber terminal.

20 WLL subscriber network elements connected to a local exchange via a V5.2 interface are not capable of transmitting V5 ·; · · signaling information typical of the GSM system to other access network elements or. to the mobile network. With current technology, WLL -. 25 Extending subscriber mobility to another WLL subscriber network element in the same fixed network switching center, WLL in the other fixed network switching center | · Access to a subscriber network element or a mobile switching center in a GSM system is impossible.

It is an object of the present invention to eliminate the above problems. In particular, it is an object of the present invention to provide a novel me. a system and system that enables the mobility of the terminal also in a wireless ··· * 35 access network.

·· With respect to the features of the present invention, reference is made to the claims section.

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The present invention is directed to a method of expanding terminal mobility in a wireless access network environment. For the sake of clarity, it is stated that, in this application, the terminal device may: The term "daan" refers to a physical device, for example a mobile station, or a subscriber, for example, when talking about a defined mobility area for a terminal means a mobility area defined for a subscriber whose identity module is connected to the terminal 10. The said access network can be implemented in at least two ways: by appropriately modifying the mobile communication network to be used in a wireless access network (GSM / DCS1800 System) or by a system based on the technology used in the mobile communication system (GSM / DCS1800 Access).

System) and includes a local exchange and a subscriber network element connected to the local exchange. Preferably, the access network element is connected to the local exchange via a V5 interface according to the above standard. In addition, the system includes a terminal and a base station, which is connected to the local exchange via a local area network element and which is used to transmit the local area network element and the terminal equipment. I'm making phone calls. Terminal and base station. 25 communicate via radio. Further, the home network of the terminal and a predetermined mobility range are defined by the base station and its associated access network element · · · · ·, so that the terminal only accesses the home base station through its home base station.

A plurality of base stations of the other • · • *. · Networks are arranged around the access network, whereby the terminal receives information signals from the surrounding base stations and in. *. based on the format signals, decides the base station to which the terminal is communicating, just as is known in the mobile * ··· * 35 ink technology.

According to the invention, a signaling channel is provided between a local exchange and a subscriber network element to provide information related to the control of mobility of the terminal. The signaling channel may be a fixed or dynamically allocated time slot from the V5 interface. Further, according to the invention, when a terminal moves outside the coverage area of its home base station or at a low coverage area, a second base station, which is primarily in communication, is determined based on information provided by the terminal, such as a list of base stations to which the terminal another access node connected to the local exchange. Further, the terminal is transferred to another base station and the transfer is registered at the local exchange of the home network. It is also possible, if the terminal is unable to establish a radio connection to another access point connected to the local exchange, that the second base station belongs to the mobile network, notifying the mobile network radio network information 20 The Ti-wide is set as a temporary subscriber in a dynamic. . ·. 25 TI, which is different from normal GSM network management, as the operator normally creates a subscriber to the HLR.

• · .Γ * A temporary subscriber is treated as * *. · • ^ any GSM network subscriber.

An advantage of the present invention over the known technical ankle is that when a subscriber network element of its own WLL • · j '·· is within the coverage range of a base station, the subscriber has access to a normal fixed network. services, such as the lower operating costs provided by the fixed network, and yet, where necessary, the subscriber has unlimited mobility under another 103 1036 local area network or mobile network under the same local exchange.

Thus, the invention makes it possible to extend the mobility of a fixed network subscriber from a WLL subscriber network test element with another subscriber network element or mobile network to the same subscriber terminal, allowing the subscriber to contract with the operator to extend its mobility to multiple WLL subscriber network elements.

A further advantage of the invention over the prior art is the uniformity of numbering. Namely, when the subscriber in the system according to the invention is under the control of a public mobile network, the t1-15 broad can be reached by a normal fixed telephone network number assigned to the subscriber.

In an embodiment of the present invention, a signaling channel 20 is also provided at the interface between the local exchange and the other access network element to provide terminal mobility information, such as a list of base stations to which the terminal is capable of handoff according to mobile network specifications. Further set up at the local center. A signaling channel is provided between the first 25 subscriber network elements and the second subscriber network element along which!! * Is transmitted between the subscriber network elements * ..

acetate. The transmitted signaling is used to aid in the transfer of the terminal to the second access node 30.

• · | ** · On the other hand, because it is possible to transfer the ti-::: wide also to the mobile network, so some. *; in this embodiment, a second signaling channel 35 is established between the local exchange and the mobile communication network, by means of which information related to terminal mobility management, such as a list thereof, is transmitted. · Base stations to which the terminal is capable of handover according to e 103466 6 mobile network specifications. Further, in the local exchange, a signaling channel is formed between the first access network element and the mobile network, along which signaling between the first-5 access network elements and the mobile network is transmitted. The transmitted signaling is used to aid in moving the terminal device under the mobile communication network.

When a subscriber is on a call and when a t-10 broadband is being transferred from a subscriber network element, which is a subscriber's own network element, to another subscriber network element communicating with the same local exchange, the protocol implemented in the local exchange is first selected and subordinated to for the subscriber, a temporary V5 / L3 address to the subscriber network element where the subscriber is moved. The V5 / L3 address is the one to 20 detecting address of a particular subscriber defined on a particular V5 interface. Each subscriber must have a different V5 / L3 address.

Further, the establishment and sounding of voice paths under a second access network element to a subscriber that is fixedly assigned to a different access network test element and which is moved or under the control of another access network element must be done through either the normal V5 / L3 address space i · ..

"... using normal isolated addresses that do not uniquely identify a subscriber 30 but dynamically transferred to a subscriber network element, a subscriber transferred to the same fixed network switch according to the invention. · *: a subscriber to a wide area network element, or using a dedicated V5 interface address space, whereby the entire V5-r; 35 interface address space is reserved for use in accordance with the invention t for dynamic switching of subscribers. two or more V5 interfaces are defined between 1 - n for normal use to connect fixed subscribers from a local area network to a local exchange and 1 - n for V5 under a subscriber network 5 test element for subscribers to be transported by a transmission procedure according to the invention. under their cement, the call is established at the subscriber's own V5 / L3 address in accordance with the V5 specifications. When the subscriber has been transferred to another subscriber network element by a transmission procedure 10, the call is established according to the value of the separate V5 / L3 address space temporarily provided to the subscriber according to the signaling of the normal V5 interface. That is, the subscriber has one own fixed 15 V5 / L3 address under the subscriber network element where the subscriber mainly moves, i.e. where his operator has assigned and n borrowed V5 / L3 address space addresses depending on which cells or subscriber network elements the subscriber 20 visits. The protocol in the local exchange manages these borrowed V5 / L3 addresses, depending on where the subscriber is being moved. From the viewpoint of the Pro-'1 'token, the free V5 / L3 address to be borrowed is freely assigned to any WLL subscriber of a state-of-the-art network to be subordinated to another state-of-the-state network element. From the point of view of the protocol-managed V5 / L3 addresses, the address can i ..

* ... be able to use the WLL space of any local exchange for ice. When the WLL subscriber returns to his own subscriber network element, the protocol will release the V5 / L3 address borrowed to the subscriber, after which the address may be given to anyone. · ' · Joking. At the end of the transmission, the change of the connection is synchronized in both the local exchange and the subscriber i: 35 * 35 network elements and the call first established through the subscriber network element is discharged normally.

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On the other hand, if the terminal receives a terminating call while the terminal is under the mobile network, the protocol implemented in the local exchange determines the radio network 5 information of the terminal from the subscriber network element and initiates call establishment from the local exchange via the signaling channel to the mobile network. Further, before transferring the terminal to a mobile network, call management operations are performed using a protocol established in the local exchange. In addition, the terminal, i.e. subscriber access to the mobile network This check prevents the terminal from moving to the mobile network if a lack of access is detected. Such a situation may occur if the subscriber's operator has not made a so-called. roaming agreement with the operator of the mobile network to which the subscriber is going.

Further preferably, all operations related to call management 20, such as handovers and transfer to another subscriber network element, are performed or controlled by a protocol established in the local exchange.

Furthermore, in one embodiment of the invention, the access to the terminal is checked for another support. station and access network element and prevent the • · device from being transferred to them unless access is granted - * ....

It is a further object of the invention to provide a system 30 for expanding the mobility of a terminal device in a wireless access network environment such as the one described above. According to the invention, a connection between a local exchange and a wide area network element the interface includes a signaling channel for transmitting information related to the mobility management of the terminal i: 35. Preferably, the system also includes a second access network element, connected to a local exchange, preferably via a V5 interface, and a second base station connected to the second access network element The interface between the local exchange and the second access network element includes a second signaling channel 5 for transmitting information related to the control of the mobility of the terminal. between the wide area network element and the second access network element, and by means of which information related to the terminal mobility management between the local area network elements is transmitted. In addition, between the first and second signaling channels connected to the aforementioned mobile networks, a fourth signaling channel 15 is formed in the local exchange, through which the access network element and the mobile communication network can be directly connected.

The invention will now be described, by way of example, with reference to the accompanying drawings, in which Figure 1 schematically illustrates a system according to the present invention; and Figure 2 schematically shows another system of the present invention.

The system illustrated in Figure 1 includes a local exchange LE provided with a handover and roaming protocol P1 and the operations it requires. In addition, the system includes a first and a second access node AN, ANn, connected via a V5.2 interface to a local exchange LE. In addition, each of the access network elements AN, ANn is connected to a base station BS, BSn, respectively. The base station BS dial · *; the number range corresponds to the mobility range of the terminal MS • «· MA. Instead, the coverage area of the base station BSn defines the coverage area MAn of t "* 35. The mobility area is the area assigned to a single t WLL subscriber where the subscriber can be and move. The term in this application may be replaced by the word association of the base station. Thus, MA is a subscriber-specific parameter that defines where a subscriber can move with his or her terminal equipment, and on the other hand, it is precisely the object of the invention to provide the ability to dynamically expand the subscriber's range of mobility.

Further, Figure 1 illustrates the signaling of the V5 interface between the access node AN, ANn and the local exchange LE. Both standard PSTN (PSTN) signaling (Public Switched Telephone Network) and ISDN signaling can be created on the Signa-10 interface. In addition, the channel has a dedicated channel for V5 control messages (V5 ctrl) and V5 interface BCC (Bearer Channel Control) messages. The interface further comprises, in accordance with the invention 15, a signaling channel S1, S2 for signaling handover and other mobility management information of the terminal MS. Further, Figure 1 illustrates a third signaling channel S3 formed at the local exchange LE between signaling channels 20 S1 and S2. Signaling channel S3 enables information to be transmitted between access network elements AN, ANn independently of other network components.

Referring now to Figure 1, a preferred embodiment of the present invention is shown. As described above, to the V5.2 interface. a separate signaling channel, S1, S2 is defined which • · .1 ”transmits signaling related to the mobility management of the terminal MS X · · * ... from the state element j of the ETS 300 347 series] to other GSM-30 supporting technologies network elements or network • ·! * ·· hin. When the terminal MS moves away from its own base station ·· «ί # ί: BS, which in this example is a fixed network WLL-, · *; a base station BS of the access node AN, in the coverage area MA, the access node AN requests a list of handover candidates from the terminal MS. The subscriber # · 'network element AN transmits the information of the base station candidate 103466 to the protocol P1 in the local exchange LE utilizing the signaling channel SI.

Based on the information transmitted by the access network AN in the local exchange LE, the protocol P1 primarily selects the network element ANn to which the terminal MS can be transferred. If the transfer is successful, the local exchange LE establishes a signaling link S3 between the two access network elements AN, ANn. The access network elements 10 AN, ANn negotiate with each other on the necessary measures using the signaling channel S3.

When the terminal MS is handed over to another access node ANn, the received access node ANn notifies the push center LE of the event via signaling channel S2. The local exchange LE stores the information and thus is able to direct the terminating calls to the terminal MS to the correct space and network element ANn.

If the terminal MS has a call in progress during the 20 transfer events described above, and if the subscriber network elements AN, ANn have decided to transfer the call to another subscriber network element ANn, then the subscriber network element ANn notifies transfer to protocol P1 on signaling channel S2. The protocol 25 P1 sounds like an access node ANn and a local one. . a free time slot separated from the normal headset V5.2 interface between the exchange and establishes a call over the V5i ♦ · * · 'interface of the access node ANn according to the ETS 300 347 series specification. The protocol P1 informs the access network elements AN and ANn of the call it has made over the signaling channels S2 · · f * ·· and SI. Protocol Pl can be obtained from both, · *? from the access node AN, ANn to indicate the capability of the voice path and synchronize the switching change in the local exchange LE and in both the access node AN, ANn. The call initially established to the access node 'AN' is disconnected from V5-12 103466 according to the ETS 300 347 series specification, controlled by protocol P1.

Accordingly, the system shown in Figure 2 includes a local exchange LE provided with a handover and roaming protocol P1 and the features it requires. In addition, the local exchange has a subscriber database DB containing necessary subscriber information, such as a mobility area assigned to the subscriber. Further, the system comprises 10 access network elements AN, which are connected via a V5.2 interface to a local exchange LE. Further, a base station BS is connected to the access node AN, the coverage area of which in this example corresponds to a predetermined mobility area MA for the terminal MS.

Further, Figure 2 illustrates the signaling of the V5 interface between the access node AN and the local exchange LE. Both standard PSTN (Public Switched Telephone Network) and ISDN signaling can be signaled at the interface. In addition, the channel has a dedicated channel for V5 control messages (V5 ctrl) and V5 interface BCC (Bearer Channel Control) messages. Further, in accordance with the invention, the interface includes a signaling channel SI for signaling handover and other mobility of the terminal MS; 25 management information. The drawing further shows a second signaling channel S2 formed from a local exchange LE to a mobile switching center t i »MSC. Signaling channel S2 can transmit 30 · subscriber information between the local exchange and the mobile switching center. The system · · f '·· shown in the drawing further comprises a third signaling channel S4, which is formed by a local signaling channel · · · V. ; Between SI and S2.

• t I

Further, Figure 2 illustrates the structure of a mobile blood: V 35 machine, which is known per se but of which '· * may be mentioned to the extent that the wireless subscriber ·. : the network access node network element corresponds to the functions 131034646 of both the MSC and the BSC, which in Figure 2 are inside the box ANn indicated by dashed lines.

Referring now to Figure 2, another preferred embodiment of the present invention occurs when a terminal MS is able to establish a radio connection only to a base station BSn which is under a mobile network and where the WLL subscriber of the initially fixed telephone network is dynamically connected to a local GSM system. a subscriber.

When a WLAN subscriber terminal MS wirelessly connected to a fixed local area network switching center LE leaves the coverage area MA of its own base station, the WLL subscriber network element AN operating under a fixed local area network switching center LE 15 notifies the to poor coverage.

The protocol software P1 in the fixed network local exchange LE examines the data transmitted by the access node AN and the terminal MS and compares it with the thresholds set by the operator. If the protocol software P1 decides to transfer the subscriber to the GSM-25 network, it notifies the incoming subscriber to the Home Location Register (HLR) HLR located in the GSM mobile switching center MSC using signaling channel S2. If your home? · * 'Register The HLR accepts the offered subscriber, it informs the protocol P of the local exchange LE, which establishes a local PSC, which forms the local exchange · «* ϊ # ϊ! signaling channel S4 for signaling channels S1 and S2 for Lille.

«F i Home directory in the GSM system exchange | t

*; * 35 teri HLR requests a fixed network local exchange LE

i

<'From a subscriber network element AN

. : specific information of the radio subscriber of the mobile subscriber to be transferred or the MS and sets the subscriber as a temporary subscriber to its own system. At the end of the transfer, the home location register HLR notifies the protocol software P1 located in the local exchange LE that the subscriber 5 is temporarily under the global GSM network. Based on the announcement, the protocol software P1 marks in the local exchange LE subscriber database DB the subscriber database that the subscriber is temporarily under the GSM system.

10 If a subscriber receives a terminating call to a fixed network local exchange LE, the call control detects from the subscriber data DB that the subscriber has its own space unavailable to its network element AN. The call control of the local exchange LE transfers the call to the manager-15 nan protocol software P1, which requests the subscriber's radio network-specific information from the subscriber network element AN. Upon receipt of the information, the protocol P1 initiates call setup in the direction of the GSM network via signaling channel S2.

20 Where two or more GSM operators are operating in the same geographical area, the subscriber may choose which operator to use when roaming, provided that the subscriber's home network operator has a roaming agreement with that operator.

The invention is not limited to the above embodiments only, but many modifications are possible within the scope of the inventive idea as defined in the claims.

• • • • • • • • • • • • • • 1 1

Claims (19)

A method for expanding the mobility of a terminal equipment in a wireless subscriber network environment, which is based on technology used in mobile communication systems and associated with a local exchange (LE), a first subscriber network element (AN), which is joined to the local exchange, a terminal equipment (MS) and a base station (BS), which via the subscriber network element is connected to the local exchange and by means of which call signals are transmitted between the subscriber network element and the terminal equipment, where the terminal equipment's home network and mobility area (MA) are defined by the base station and the subscriber network element connected thereto and in the environment of the subscriber network a plurality of other network base stations (BSs) are arranged, the terminal equipment from the surrounding base stations receiving information signals and because of the information signals the base station determines with which the base station determines -2 0 distinction, characterized d hence, in the interface of the local exchange (LE) and the interface of the first subscriber network element (AN), a signaling channel (SI) is formed, with the aid of which data relating to the control of the terminal equipment is transmitted; and that the terminal equipment moves beyond its range of mobility (MA) is determined by the data provided by the terminal equipment (MS) of the second base station (BSn). M,, ϊ: which terminal equipment is obscured to form a radio connection; ; V. the terminal equipment is moved to obey the • second base station; and • * ♦ the movement is registered in the local network of the home network: "ral (LE). · ... · 35 2. A method according to claim 1, characterized in that the second base station • ♦ ♦. ···. (BSn) primarily interferes with a second subscriber network element (ANn) connected to a local exchange (LE). Method according to claim 1 or 2, characterized in that unless the second base station (BSn) to which the terminal equipment is forming a radio connection belongs to the mobile communication network, the radio network data of the terminal equipment is communicated to the mobile communication network; and the terminal equipment is temporarily added as a subscriber in the mobile communication network, the terminal equipment operating in the mobile communication network according to its normal definitions. A method according to any of the preceding claims 1 - 3, characterized in that a signaling channel (S2) is formed in the interface between the local exchange (LE) and the second subscriber network element (ANn) and / or between the local exchange and the mobile communication network. with the help of which data is communicated regarding the control equipment of the terminal equipment (MS). Method according to any of the preceding claims 1 - 4, characterized in that the data provided by the terminal equipment (MS) hears a list of the base stations (BSs) to which the terminal equipment is capable of performing channel switching according to the mobile communication. definitions of the communications network. * · · Method according to any of the preceding claims 1 to 5, characterized in that in the local exchange (LE) a signaling channel (S3) is formed between the first subscriber network element (AN) and the second subscriber network element (ANn). along which the signaling between the subscriber network elements is conveyed. • ♦ · 7. A method according to any preceding claim; Tent requirements 1 - 5, characterized in that the: lolal center (LE) is formed between the first subscriber; the signaling network element (AN) and the mobile communication network a signaling channel (S4), through which the signaling is communicated between the subscriber network element and the mobile communication network. 8. A method according to any of the preceding claims 1 - 7, characterized in that, unless in the terminal equipment, a call during the movement between the subscriber network elements (AN, ANn), Sei is notified of the transfer of the terminal equipment to the local exchange with the signaling channel (S2); 10 is listened to for a free time section in the interface between the subscriber network element (ANn) and the local exchange and the call is formed via the interface in a normal manner; communicated about the formed call to the subscriber network element (AN, ANn); 15 is communicated to the local exchange about the call path of the two subscriber elements (AN, ANn) and the change of the connection is synchronized both in the local exchange and in the subscriber network elements; and the call first formed via the subscriber network element (AN) is normally interrupted. 9. A method according to any of the preceding claims 1 - 7, characterized in that unless the terminal equipment (MS) comes to an end which terminates while the terminal equipment subverts the mobile communication network, the radio network data of the terminal equipment is determined from the subscriber network element (AN); and the call formation is started from the local exchange (LE) by mediating the signaling channel (S2) to the mobile communication network. S ' 10. A method according to any of the preceding claims 1-9, characterized in that the terminal equipment (MS) is moved to the subordinate of the mobile communication network, the connection checks are carried out measures using. a protocol (P1) formed in the local exchange (LE). 103466 Method according to any of the preceding claims 1 - 10, characterized in that the right of use of the terminal equipment (MS) to the other subscriber network element (ANn), to the second base station (BSn) and / or the mobile communication network is controlled. ; and the transfer of terminal equipment to their compliance is prevented if it is observed that the right of use is lacking. Method according to any of the preceding claims 1 - 11, characterized in that the interface between the local exchange (LE) and the subscriber network element (AN, ANn) is a V5 interface according to the standard ETS 300 347 series. 13. System for expanding the mobility of a terminal equipment in a wireless subscriber network environment, which is based on technology used in a mobile communication system and to which belongs a local exchange (LE), a first subscriber network element (AN), which is connected to the local exchange, a terminal equipment (MS) and a base station (BS), which via the subscriber network element is connected to the local exchange and with the aid of which call signals are transmitted between the subscriber network element and the terminal equipment, where the home equipment and mobility area (MA) of the terminal equipment de- ···. ' 25 is terminated by means of the base station and the subscriber network element connected thereto, characterized by • · t ϊ ...! thereof, that the interface between the local exchange (LE) and the subscriber network element hears a signaling channel; * · *; (SI), with the help of transmitting data relating to the mobility equipment of the terminal equipment. S '·' 14. The system according to claim 13, characterized in that the system belongs to a second. subscriber network element (ANn), which is connected to the local exchange (LE), and a second base station (BSn), which is connected to the second subscriber network element or *. smiles the mobile communications network; and that the interface between the local exchange (LE) and the other subscriber network element hears a signaling channel (S2), through which data on the control of the terminal equipment (MS) is transmitted. 24 1 0 3 4 6 6 System according to claim 13 or 14, characterized in that the system includes a third signaling channel (S3) formed in the local exchange (LE) between the first subscriber network element (AN) and the second subscriber network element (ANn), and a fourth signaling channel (S4) formed in the local exchange (LE) between the first subscriber network element (AN) and the mobile communication network and with the aid of which data on the control of the terminal equipment (MS) is transmitted between the subscriber network elements and / or the first subscriber network element and the mobile network. communication network. System according to any one of the preceding claims 13 - 15, characterized in that the interface between the local exchange (LE) and the subscriber network element (AN, ANn) is a V5 interface 20 according to the standard ETS 300 347 series. System according to any one of the preceding claims 13 - 16, characterized in that the system belongs to a dynamically definable V5 / L3 address space, which is arranged in its own separate V5- ...: 25 interface and / or separated from a predetermined address space V5 interface. · »· • • • • • •» • • • «• 0 9 9 0 0 0 mm · m m · 9 · 9 01 0 0 0 9 9 90 0 ·· 0 9 0