WO2000036794A1 - Method and apparatus in a communication network - Google Patents

Method and apparatus in a communication network Download PDF

Info

Publication number
WO2000036794A1
WO2000036794A1 PCT/SE1999/002330 SE9902330W WO0036794A1 WO 2000036794 A1 WO2000036794 A1 WO 2000036794A1 SE 9902330 W SE9902330 W SE 9902330W WO 0036794 A1 WO0036794 A1 WO 0036794A1
Authority
WO
WIPO (PCT)
Prior art keywords
addresses
mobile terminal
network
connection
level
Prior art date
Application number
PCT/SE1999/002330
Other languages
French (fr)
Inventor
Olof Granberg
Staffan Alexius
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to EP99964857A priority Critical patent/EP1142224A1/en
Priority to JP2000588932A priority patent/JP2002533018A/en
Priority to AU30898/00A priority patent/AU3089800A/en
Publication of WO2000036794A1 publication Critical patent/WO2000036794A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/10—Mapping addresses of different types
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5084—Providing for device mobility
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]

Definitions

  • the present invention relates to data communication and more specifically to the mobility of terminals in packet switched networks, such as Internet Protocol (IP) networks.
  • IP Internet Protocol
  • Such networks are mainly developed for stationary terminals connected to the network by wired connections.
  • Mobile terminals may be connected by use of base transceiver stations, but to achieve true mobility functions are required for handling i.a. roaming and handover in the network.
  • H.323 recommendation from the Telecommunication Standardization Sector of the International Telecommunication Union specifies terminals and equipment for multipoint teleconferencing and multimedia communication services.
  • H.323 specifies how to interwork with existing network and equipment.
  • the H.323 recommendation does not specify or recommend functionality, architecture, protocols etc. for mcluding mobile terminals.
  • the Mobile-LP working group of the Internet Engineering Task Force (LETF) is cur- rently working on a standard for mobile IP.
  • the main goals of the Mobile IP standard are:
  • the system shall work within the TCP/IP protocol suite and provide Internet-wide mobility.
  • the system shall be transparent to higher layer protocols and allow hosts to keep their IP addresses as they migrate.
  • a mobile terminal in this context does not mean a mobile te ⁇ ninal having a radio interface but a fixed terminal or user that changes its point of a attachment from one fixed network to another.
  • LP addresses are used to identify terminals connected to an IP network, and may be allocated dynamically or permanently.
  • MAC addresses are unique to each te ⁇ ninal. Each manufacturer of data terrninals has a number series from which a number is taken to identify each individual terminal.
  • a base transceiver station may be seen as a bridge, with the mobile te ⁇ ninal on one side and the remaining network on the other.
  • bridges have several advantages.
  • a bridge interconnecting two Local Area Networks (LANs) learns where a particular MAC address is connected and only directs calls to terrninals found on the other side of the bridge through it.
  • a bridge is also insensitive to higher level protocols. It monitors all traffic on the subnetworks that it links, reading every packet, but only for the MAC layer source and destination address. On this basis alone the bridge determines the subnetwork from which the packet is coming and to which it is going. This means that a bridge can interconnect networks according to higher-level protocols that are incompatible.
  • Routers are also used to interconnect LANs, but they are protocol dependent and work on a higher level than bridges.
  • the object is achieved according to the invention by a method for establishing a connection to or from a mobile terminal in a packet switched communication network, said mobile terminal being connectable to said network by means of a base transceiver station, said method comprising the steps of assigning a temporary LP address and a temporary address according to a protocol on a level below the IP level, to the mobile teraiinal, by which the mobile terminal may be identified for the duration of the connection, and storing said addresses in the base transceiver station;
  • an apparatus for use in a packet switched communication network said apparatus being adapted to monitor connections to mobile terminals in the communication network, said apparatus comprising: a table of unique addresses on a level lower than the LP level, that may be used to identify a mobile terminal connected to the network temporarily for the duration of a connection; means for dynamically assigning LP addresses that may be used to identify a mobile terminal connected to the network temporarily for the duration of a connection.
  • the method and apparatus enables the dynamic allocation of LP addresses and lower-level addresses to a mobile terminal while such addresses are needed, that is, while the mobile te ⁇ ninal is connected to the network.
  • the lower-level address may be, for example, a MAC address, as described above.
  • the method according to the invention further comprises the steps of initiating the assignment of the IP and lower-level addresses by requesting a connection to the mobile terminal from another terminal in the network; and establishing a connection to the mobile terminal through the base transceiver station, using the temporarily assigned LP and lower-level addresses to identify the mobile terminal.
  • the method according to the invention further comprises the steps of initiating the assignment of the IP and lower-level addresses by requesting a con- nection from the mobile terminal to another terminal in the network establishing a connection to the mobile terminal through the base transceiver station, using the temporarily assigned LP and lower-level addresses to identify the mobile terminal.
  • the apparatus specified above may also comprise a table of IP addresses that may be assigned temporarily to terminals connected to the network.
  • a packet switched network comprising at least one apparatus according to the above.
  • the network may also comprise a node comprising a number of IP addresses that may be used by the apparatus according to the invention.
  • the base transceiver station may be seen as a variant of a bridge, but only from the network side, since the mobile station which it connects to the network does not in itself act as a subnetwork in the way a terminal having an IP address and a MAC address would. It therefore provides the above mentioned ad- vantages associated with bridges.
  • the solution according to the invention is independent of the type of terminal and the radio protocol used. It can be applied in, for example, in GSM systems, Bluetooth and DAMPS, and in any other type of packet switched communication net- works.
  • Figure 1 A is an overview of a data network according to the invention
  • Figure IB illustrates the situation in the data network shown in Figure 1A after a handover has been performed according to the invention
  • Figure 2 is a flow chart of the procedure for calling a mobile terminal in a data network according to the invention
  • Figure 3 is a flow chart of the procedure of making a call from a mobile terminal in a data network according to the invention.
  • Figure 4 is a flow chart of the handover procedure according to the invention.
  • Figure 1A shows a network according to an embodiment of the invention.
  • the network may comprise several subnetworks 1, 3 connected to each other by means of routers 5.
  • a number of stationary terminals 7, 9, 11 may of course be connected to each of the subnetworks 1, 3 in ways well known in the art.
  • the router 5 keeps a table of IP addresses and MAC addresses found in each subnetwork to facilitate the routing between subnetworks 1,3. There- fore, the establishment of connection between subnetworks connected by a router requires that both the involved terrriinals has both an IP address and a MAC address.
  • one or more mobile terminals 13, for example, mobile telephones may be connected.
  • base transceiver stations 15, 17 are used.
  • the base transceiver stations are connected to the respective subnetwork and provide radio connection to the mobile terminals.
  • the subnetwork 1 also comprises a Radio Network Controller (RNC) 19.
  • RNC Radio Network Controller
  • a mobile terminal is identified in a base transceiver station and an RNC by means defined by the radio standard used.
  • the International Mobile Subscriber Identity (IMSI) is used.
  • the RNC reserves a channel for the mobile terminal when a connection is needed. The nature of the channel also depends on the standard used, for example, in GSM systems it will be a time slot, in FDMA systems it will be a frequency, etc.
  • each base transceiver station 15, 17 is shown with two time slots TS1, TS2 and TS3, TS4, respectively.
  • a connection from the mobile terminal 13, to the first terrninal 9 in the other subnetwork is shown, using the first time slot TS1 in the first base transceiver station 15.
  • the mobile terminal 13 must have a MAC address and an LP address.
  • the RNC 19 comprises a table of MAC addresses that may be dynamically allocated to te ⁇ riinals when needed. This means that a MAC number series must be reserved for each RNC according to the invention.
  • the subnetwork also comprises a Dynamic Host Configuration Protocol (DHCP) server 21 which, among other things, comprises a from of IP addresses that may be borrowed by the RNC for temporary allocation according to the invention.
  • DHCP Dynamic Host Configuration Protocol
  • the RNC 19 keeps a number of idle IP addresses that may be dynamically allocated to terminals when needed, to avoid the delay caused by requesting a new IP address each time a call is made.
  • the whole IP address table may be kept in the RNC 19.
  • a MAC address and an LP address are associated with each time slot, or effectively each mobile terminal, so that it can be addressed by other terminals.
  • the mobile te ⁇ ninal is not aware of its own MAC and IP addresses. These addresses are only used by the network to identify the mobile terminal as long as the connection lasts.
  • the RNC 19 supervises each connection. When the RNC determines that the mobile terminal is moving out of the area covered by the base transceiver station to which it is currently connected and into the area covered by another base station, it orders a handover by iiifor ⁇ iing the new base station that it should take over the connection to the mobile terminal 13. The RNC 19 informs the new base station about the MAC address and IP address that have been dynamically allocated to the mobile terminal 13.
  • Figure IB shows the situation after the handover has been completed.
  • the connection from the mobile terrninal 13 to the terminal 9 in the other subnetwork 2 now only goes through the second base station 17.
  • the associations to the MAC and LP addresses are removed in the first base station.
  • the associations are kept for a period of time after the handover, so that if the handover fails, the connection can be moved back to the first base station.
  • Figure 2 shows the procedure for making a call to a mobile terminal 13 in the data network according to the invention.
  • Step S21 An mcoming call for the mobile terrninal 13 is detected by the RNC 19.
  • the call may be made from a terminal in the same subnetwork or in another subnetwork.
  • Step S22 The RNC 19 retrieves an IP address and a MAC address to be dynamically allocated to the mobile terminal 13.
  • the RNC 19 comprises a table of MAC addresses that may be used for this purpose.
  • the LP addresses are usually found in the DHCP server 21.
  • Step S23 The RNC 19 informs the BTS 15 about the MAC and IP addresses that have been dynamically allocated to the mobile terrninal 13 and orders the BTS 15 to set up a connection to the mobile terrninal 13 using these MAC and LP addresses to identify the mobile terrninal 13 and to establish a connection to it on a specific time slot.
  • Step S24 The connection is set up and data is transmitted and routed.
  • Figure 3 shows the procedure for making a call from a mobile terminal 13.
  • Step S31 The mobile terminal 13 requests a connection by signalling to the RNC 19 via a BTS 15.
  • Step S33 The connection is established.
  • the mobile terminal 13 is identified by the dynamically allocated IP and MAC addresses.
  • Step S34 Data is transmitted and received until the connection is ended.
  • Figure 4 is a flow chart of the handover procedure according to the invention.
  • the mobile terminal is connected to another terminal 9 in the network as shown in Figure 1A, that is, through the first BTS 15.
  • Step S41 The mobile terrninal moves into an area covered by another BTS 17.
  • Step S42 The RNC 19 informs the new BTS 17 about the MAC and LP addresses that have been dynamically allocated to the mobile terminal 13 and orders it to take over the communication with the mobile terminal 13 on a specific time slot TS4.
  • Step S43 The new BTS 17 establishes a connection to the mobile terminal 13.
  • Step S44 When the connection through the new BTS 17 has been established, the mobile terrninal 13 signals "handover completed" to the RNC 19 through the new BTS 17.
  • Step S45 The RNC 19 orders the old BTS 15 to remove the associations to the MAC and IP addresses. This is the situation resulting from the hando- ver, as shown in figure lC.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

The mobility of terminals connected to an IP network through a radio interface is enabled by assigning a temporary IP address and a temporary address according to a protocol on a level below the IP level, such as a MAC address, to the mobile terminal, by which the mobile terminal may be identified for the duration of a connection, and storing said addresses in the base transceiver station. An apparatus, effectively an RNC, that will enable mobility in a packet switched communication network, is also disclosed, comprising a table of unique addresses on a level lower than the IP level, that may be used to identify a mobile terminal connected to the network temporarily for the duration of a connection, and means for dynamically assigning IP addresses that may be used to identify a mobile terminal connected to the network temporarily for the duration of a connection.

Description

METHOD AND APPARATUS IN A COMMUNICATION NETWORK
Technical Field
The present invention relates to data communication and more specifically to the mobility of terminals in packet switched networks, such as Internet Protocol (IP) networks.
Description of Related Art
Such networks are mainly developed for stationary terminals connected to the network by wired connections. Mobile terminals may be connected by use of base transceiver stations, but to achieve true mobility functions are required for handling i.a. roaming and handover in the network.
For example, the H.323 recommendation from the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T) specifies terminals and equipment for multipoint teleconferencing and multimedia communication services. H.323 specifies how to interwork with existing network and equipment.
The H.323 recommendation does not specify or recommend functionality, architecture, protocols etc. for mcluding mobile terminals.
The Mobile-LP working group of the Internet Engineering Task Force (LETF) is cur- rently working on a standard for mobile IP. The main goals of the Mobile IP standard are:
The system shall work within the TCP/IP protocol suite and provide Internet-wide mobility.
The system shall be transparent to higher layer protocols and allow hosts to keep their IP addresses as they migrate.
No changes shall be required of non-mobile hosts and routers. It should be noted that a mobile terminal in this context does not mean a mobile teπninal having a radio interface but a fixed terminal or user that changes its point of a attachment from one fixed network to another. A solution which supports mobility of teπninals connected to an IP network via a radio interface, and even handover, is disclosed in US 5, 371 738. According to this solution bridges are used for the connection between the mobile terminals and the IP network.
The main problem with this solution is that it only works for terminals that have an LP address and a Media Access Control (MAC) address. LP addresses are used to identify terminals connected to an IP network, and may be allocated dynamically or permanently. MAC addresses, on the other hand, are unique to each teπninal. Each manufacturer of data terrninals has a number series from which a number is taken to identify each individual terminal.
Many terrninals, for example, mobile telephones, do not have such addresses, and therefore, the solution cannot be used.
In this context, a base transceiver station may be seen as a bridge, with the mobile teπninal on one side and the remaining network on the other.
The use of bridges has several advantages. A bridge interconnecting two Local Area Networks (LANs) learns where a particular MAC address is connected and only directs calls to terrninals found on the other side of the bridge through it. A bridge is also insensitive to higher level protocols. It monitors all traffic on the subnetworks that it links, reading every packet, but only for the MAC layer source and destination address. On this basis alone the bridge determines the subnetwork from which the packet is coming and to which it is going. This means that a bridge can interconnect networks according to higher-level protocols that are incompatible.
Routers are also used to interconnect LANs, but they are protocol dependent and work on a higher level than bridges. Object of the Invention
It is therefore the object of the present invention to improve the mobility of terminals connected to an IP network through a radio interface.
Summary of the Invention
The object is achieved according to the invention by a method for establishing a connection to or from a mobile terminal in a packet switched communication network, said mobile terminal being connectable to said network by means of a base transceiver station, said method comprising the steps of assigning a temporary LP address and a temporary address according to a protocol on a level below the IP level, to the mobile teraiinal, by which the mobile terminal may be identified for the duration of the connection, and storing said addresses in the base transceiver station;
The object is also achieved according to the invention by an apparatus for use in a packet switched communication network, said apparatus being adapted to monitor connections to mobile terminals in the communication network, said apparatus comprising: a table of unique addresses on a level lower than the LP level, that may be used to identify a mobile terminal connected to the network temporarily for the duration of a connection; means for dynamically assigning LP addresses that may be used to identify a mobile terminal connected to the network temporarily for the duration of a connection.
Thus, the method and apparatus according to the invention enables the dynamic allocation of LP addresses and lower-level addresses to a mobile terminal while such addresses are needed, that is, while the mobile teπninal is connected to the network. The lower-level address may be, for example, a MAC address, as described above. According to a first preferred embodiment the method according to the invention further comprises the steps of initiating the assignment of the IP and lower-level addresses by requesting a connection to the mobile terminal from another terminal in the network; and establishing a connection to the mobile terminal through the base transceiver station, using the temporarily assigned LP and lower-level addresses to identify the mobile terminal.
These steps are carried out when a terminal in the network requests a connection to the mobile terminal.
According to a second prefeπed embodiment the method according to the invention further comprises the steps of initiating the assignment of the IP and lower-level addresses by requesting a con- nection from the mobile terminal to another terminal in the network establishing a connection to the mobile terminal through the base transceiver station, using the temporarily assigned LP and lower-level addresses to identify the mobile terminal.
These steps are carried out when a mobile terminal requests a connection to another terminal in the network.
The apparatus specified above may also comprise a table of IP addresses that may be assigned temporarily to terminals connected to the network.
A packet switched network is also disclosed, comprising at least one apparatus according to the above. The network may also comprise a node comprising a number of IP addresses that may be used by the apparatus according to the invention. According to the invention, the base transceiver station may be seen as a variant of a bridge, but only from the network side, since the mobile station which it connects to the network does not in itself act as a subnetwork in the way a terminal having an IP address and a MAC address would. It therefore provides the above mentioned ad- vantages associated with bridges.
The solution according to the invention is independent of the type of terminal and the radio protocol used. It can be applied in, for example, in GSM systems, Bluetooth and DAMPS, and in any other type of packet switched communication net- works.
Brief Description of the Drawings
Figure 1 A is an overview of a data network according to the invention;
Figure IB illustrates the situation in the data network shown in Figure 1A after a handover has been performed according to the invention;
Figure 2 is a flow chart of the procedure for calling a mobile terminal in a data network according to the invention;
Figure 3 is a flow chart of the procedure of making a call from a mobile terminal in a data network according to the invention. Figure 4 is a flow chart of the handover procedure according to the invention;
Detailed Description of Embodiments
Figure 1A shows a network according to an embodiment of the invention. The network may comprise several subnetworks 1, 3 connected to each other by means of routers 5. A number of stationary terminals 7, 9, 11 may of course be connected to each of the subnetworks 1, 3 in ways well known in the art.
As common in the art, the router 5 keeps a table of IP addresses and MAC addresses found in each subnetwork to facilitate the routing between subnetworks 1,3. There- fore, the establishment of connection between subnetworks connected by a router requires that both the involved terrriinals has both an IP address and a MAC address.
Also, one or more mobile terminals 13, for example, mobile telephones may be connected. For connecting such terrriinals to the network, base transceiver stations 15, 17 are used. The base transceiver stations are connected to the respective subnetwork and provide radio connection to the mobile terminals. The subnetwork 1 also comprises a Radio Network Controller (RNC) 19. Generally, a mobile terminal is identified in a base transceiver station and an RNC by means defined by the radio standard used. For example, in GSM the International Mobile Subscriber Identity (IMSI) is used. The RNC reserves a channel for the mobile terminal when a connection is needed. The nature of the channel also depends on the standard used, for example, in GSM systems it will be a time slot, in FDMA systems it will be a frequency, etc.
In Figures 1A and IB, each base transceiver station 15, 17 is shown with two time slots TS1, TS2 and TS3, TS4, respectively. A connection from the mobile terminal 13, to the first terrninal 9 in the other subnetwork is shown, using the first time slot TS1 in the first base transceiver station 15.
For this to work, the mobile terminal 13 must have a MAC address and an LP address. According to the invention, the RNC 19 comprises a table of MAC addresses that may be dynamically allocated to teπriinals when needed. This means that a MAC number series must be reserved for each RNC according to the invention. The subnetwork also comprises a Dynamic Host Configuration Protocol (DHCP) server 21 which, among other things, comprises a from of IP addresses that may be borrowed by the RNC for temporary allocation according to the invention. Preferably, the RNC 19 keeps a number of idle IP addresses that may be dynamically allocated to terminals when needed, to avoid the delay caused by requesting a new IP address each time a call is made. Alternatively, the whole IP address table may be kept in the RNC 19.
When needed, a MAC address and an LP address are associated with each time slot, or effectively each mobile terminal, so that it can be addressed by other terminals. According to the invention, the mobile teπninal is not aware of its own MAC and IP addresses. These addresses are only used by the network to identify the mobile terminal as long as the connection lasts.
The RNC 19 supervises each connection. When the RNC determines that the mobile terminal is moving out of the area covered by the base transceiver station to which it is currently connected and into the area covered by another base station, it orders a handover by iiiforπiing the new base station that it should take over the connection to the mobile terminal 13. The RNC 19 informs the new base station about the MAC address and IP address that have been dynamically allocated to the mobile terminal 13.
Figure IB shows the situation after the handover has been completed. The connection from the mobile terrninal 13 to the terminal 9 in the other subnetwork 2 now only goes through the second base station 17.
When the connection through the second base station has been established, the associations to the MAC and LP addresses are removed in the first base station. According to the GSM standards, the associations are kept for a period of time after the handover, so that if the handover fails, the connection can be moved back to the first base station.
If a new handover is needed it is performed in the same way. Figure 2 shows the procedure for making a call to a mobile terminal 13 in the data network according to the invention.
Step S21: An mcoming call for the mobile terrninal 13 is detected by the RNC 19. The call may be made from a terminal in the same subnetwork or in another subnetwork.
Step S22: The RNC 19 retrieves an IP address and a MAC address to be dynamically allocated to the mobile terminal 13. According to the invention the RNC 19 comprises a table of MAC addresses that may be used for this purpose. The LP addresses are usually found in the DHCP server 21. Step S23 : The RNC 19 informs the BTS 15 about the MAC and IP addresses that have been dynamically allocated to the mobile terrninal 13 and orders the BTS 15 to set up a connection to the mobile terrninal 13 using these MAC and LP addresses to identify the mobile terrninal 13 and to establish a connection to it on a specific time slot. Step S24: The connection is set up and data is transmitted and routed.
Figure 3 shows the procedure for making a call from a mobile terminal 13.
Step S31: The mobile terminal 13 requests a connection by signalling to the RNC 19 via a BTS 15. Step S32: The RNC 19 allocates an IP address and a MAC address to the BTS 15. These addresses will be dynamically allocated to the channel on which the mobile terminal 13 is to be connected. According to the GSM standard, this will be a different channel from the one used by the mobile terrninal to signal to the RNC 19. According to other standards, the same channel may be used.
Step S33: The connection is established. In the connection the mobile terminal 13 is identified by the dynamically allocated IP and MAC addresses.
Step S34: Data is transmitted and received until the connection is ended. Figure 4 is a flow chart of the handover procedure according to the invention. When the procedure starts, the mobile terminal is connected to another terminal 9 in the network as shown in Figure 1A, that is, through the first BTS 15. Step S41: The mobile terrninal moves into an area covered by another BTS 17. Step S42: The RNC 19 informs the new BTS 17 about the MAC and LP addresses that have been dynamically allocated to the mobile terminal 13 and orders it to take over the communication with the mobile terminal 13 on a specific time slot TS4. Step S43: The new BTS 17 establishes a connection to the mobile terminal 13. Step S44: When the connection through the new BTS 17 has been established, the mobile terrninal 13 signals "handover completed" to the RNC 19 through the new BTS 17. Step S45: The RNC 19 orders the old BTS 15 to remove the associations to the MAC and IP addresses. This is the situation resulting from the hando- ver, as shown in figure lC.
If the terminal moves again so that another handover is needed, it is performed in the same way.

Claims

Claims
1. A method or estabkshing a connection to or from a mobile terminal in a packet switched communication network, said mobile terrninal being connectable to said network by means of a base transceiver station, characterized by the steps of
• assigning a temporary IP address and a temporary address according to a protocol on a level below the IP level, to the mobile terminal, by which the mobile terminal may be identified for the duration of the connection,
• storing said addresses in the base transceiver station;
2. A method according to claim 1, further comprising the steps of
• initiating the assignment of the IP and lower-level addresses by requesting a connection to the mobile terminal from another terminal in the network;
• establishing a connection to the mobile terrninal through the base transceiver sta- tion, using the temporarily assigned IP and lower-level addresses to identify the mobile terminal.
3. A method according to claim 1, further comprising the steps of
• initiating the assignment of the IP and lower-level addresses by requesting a con- nection from the mobile terminal to another terminal in the network
• establisliing a connection to the mobile terrninal through the base transceiver station, using the temporarily assigned IP and lower-level addresses to identify the mobile terminal.
4. A method according to any one of the claims 1, 2 or 3, wherein the IP and lower- level addresses are assigned by an RNC in the communication network.
5. An apparatus for use in a packet switched communication network, said apparatus being adapted to monitor connections to mobile terminals in the communication network, characterized in that it comprises a table of unique addresses on a level lower than the LP level, that may be used to identify a mobile terminal connected to the network temporarily for the duration of a connection; means for dynamically assigning IP addresses that may be used to identify a mobile terminal connected to the network temporarily for the duration of a connection.
6. An apparatus according to claim 5, wherein that said table of lower-level addresses comprises MAC addresses.
7. A packet switched network characterized in that it comprises at least one apparatus according to claim 5 or 6.
8. A network according to claim 6, further comprising an apparatus comprising a table of IP addresses that may be assigned temporarily to terminals connected to the network.
PCT/SE1999/002330 1998-12-17 1999-12-13 Method and apparatus in a communication network WO2000036794A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99964857A EP1142224A1 (en) 1998-12-17 1999-12-13 Method and apparatus in a communication network
JP2000588932A JP2002533018A (en) 1998-12-17 1999-12-13 Method and apparatus in a communication network
AU30898/00A AU3089800A (en) 1998-12-17 1999-12-13 Method and apparatus in a communication network

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9804391A SE9804391L (en) 1998-12-17 1998-12-17 Method and device in communication networks
SE9804391-2 1998-12-17

Publications (1)

Publication Number Publication Date
WO2000036794A1 true WO2000036794A1 (en) 2000-06-22

Family

ID=20413720

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1999/002330 WO2000036794A1 (en) 1998-12-17 1999-12-13 Method and apparatus in a communication network

Country Status (6)

Country Link
EP (1) EP1142224A1 (en)
JP (1) JP2002533018A (en)
CN (1) CN1330825A (en)
AU (1) AU3089800A (en)
SE (1) SE9804391L (en)
WO (1) WO2000036794A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1263188A2 (en) 2001-04-20 2002-12-04 Siemens Aktiengesellschaft A method for transfering data between a local network and an external device and a router
EP1545094A1 (en) * 2003-12-19 2005-06-22 Mitsubishi Denki Kabushiki Kaisha Method of address management
EP1732265A1 (en) * 2004-03-03 2006-12-13 Mitsubishi Electric Corporation Layer 2 switch network system
WO2006132691A1 (en) * 2005-03-18 2006-12-14 Qualcomm Incorporated Dynamic media access control (mac) address assignment
CN1326066C (en) * 2001-09-04 2007-07-11 三星电子株式会社 Communication method and its device during process
WO2008121370A1 (en) * 2007-03-29 2008-10-09 Marvell World Trade Ltd. Ip address allocation in evolved wireless networks
EP2903247A4 (en) * 2012-09-26 2016-05-11 Mitsubishi Electric Corp Communication adapter, identification code generation method, program, and network system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1331329C (en) * 2003-09-22 2007-08-08 联想(北京)有限公司 Method of realizing auto netting of family network environment
JP4816161B2 (en) * 2006-03-10 2011-11-16 日本電気株式会社 Wireless communication apparatus, MAC address management system, wireless communication method, and wireless communication program
CN101197853B (en) * 2006-12-07 2010-08-11 联想(北京)有限公司 Method and network for automatic IP address allocation
KR101490409B1 (en) * 2014-02-13 2015-02-05 현대자동차주식회사 Control unit for in-vehicle ethernet and method for controlling therof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0483547A1 (en) * 1990-10-29 1992-05-06 International Business Machines Corporation Network address management for a wired network supporting wireless communication to a plurality of mobile users
WO1997048210A1 (en) * 1996-06-14 1997-12-18 Bell Communications Research, Inc. Logical ip address assignment in atm lan
WO1998040990A1 (en) * 1997-03-12 1998-09-17 Nomadix, Llc Nomadic translator or router

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0483547A1 (en) * 1990-10-29 1992-05-06 International Business Machines Corporation Network address management for a wired network supporting wireless communication to a plurality of mobile users
WO1997048210A1 (en) * 1996-06-14 1997-12-18 Bell Communications Research, Inc. Logical ip address assignment in atm lan
WO1998040990A1 (en) * 1997-03-12 1998-09-17 Nomadix, Llc Nomadic translator or router

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7664121B2 (en) 2001-04-20 2010-02-16 Siemens Aktiengesellschaft Method and router for switching data between a local area network and an external appliance
EP1263188A3 (en) * 2001-04-20 2005-10-12 Siemens Aktiengesellschaft A method for transfering data between a local network and an external device and a router
EP1263188A2 (en) 2001-04-20 2002-12-04 Siemens Aktiengesellschaft A method for transfering data between a local network and an external device and a router
CN1326066C (en) * 2001-09-04 2007-07-11 三星电子株式会社 Communication method and its device during process
EP1545094A1 (en) * 2003-12-19 2005-06-22 Mitsubishi Denki Kabushiki Kaisha Method of address management
JP2005229582A (en) * 2003-12-19 2005-08-25 Mitsubishi Electric Information Technology Centre Europa Bv Method of address management and address management device
JP4607571B2 (en) * 2003-12-19 2011-01-05 ミツビシ・エレクトリック・アールアンドディー・センター・ヨーロッパ・ビーヴィ Address management method and address management apparatus
US7805538B2 (en) 2003-12-19 2010-09-28 Mitsubishi Denki Kabushiki Kaisha Method and device address management
EP1732265A1 (en) * 2004-03-03 2006-12-13 Mitsubishi Electric Corporation Layer 2 switch network system
EP1732265A4 (en) * 2004-03-03 2009-01-07 Mitsubishi Electric Corp Layer 2 switch network system
US7787476B2 (en) 2004-03-03 2010-08-31 Mitsubishi Electric Corporation Layer 2 switch network system
KR100937680B1 (en) * 2005-03-18 2010-01-19 콸콤 인코포레이티드 Dynamic media access controlmac address assignment
WO2006132691A1 (en) * 2005-03-18 2006-12-14 Qualcomm Incorporated Dynamic media access control (mac) address assignment
US7961724B2 (en) 2005-03-18 2011-06-14 Qualcomm Incorporated Dynamic media access control (MAC) address assignment
WO2008121370A1 (en) * 2007-03-29 2008-10-09 Marvell World Trade Ltd. Ip address allocation in evolved wireless networks
US8185107B2 (en) 2007-03-29 2012-05-22 Marvell International Ltd. IP address allocation in evolved wireless networks
US9161211B2 (en) 2007-03-29 2015-10-13 Marvell World Trade Ltd. IP address allocation in evolved wireless networks
EP2903247A4 (en) * 2012-09-26 2016-05-11 Mitsubishi Electric Corp Communication adapter, identification code generation method, program, and network system

Also Published As

Publication number Publication date
CN1330825A (en) 2002-01-09
SE9804391D0 (en) 1998-12-17
JP2002533018A (en) 2002-10-02
AU3089800A (en) 2000-07-03
EP1142224A1 (en) 2001-10-10
SE9804391L (en) 2000-06-18

Similar Documents

Publication Publication Date Title
CN100574332C (en) Support the method and system that moves of portable terminal
KR100432311B1 (en) Gprs-subscriber selection of multiple internet service providers
US6757266B1 (en) Communication system method for setting up connections between terminals of a first and second communication network
US8391210B2 (en) Radio communication system and radio transmission path control method
EP1192819B1 (en) Method and device for performing a packet data communication
KR100429182B1 (en) Method of Realizing Mobile Communication Packet Data Network in the Non-ATM Backbone Network
CA2462701A1 (en) Address transition and message correlation between network nodes
US20070153769A1 (en) Method of locating and transferring session information between access nodes in a radio access network
CA2455914A1 (en) Managing packet data interconnections in mobile communications
CA2332320A1 (en) Ip mobility management in a mobile communications system
EP1142224A1 (en) Method and apparatus in a communication network
US7142528B2 (en) Mobile communication system, gateway exchange selection server and gateway exchange selection method
CN111372102A (en) Data transmission method, device, terminal equipment and storage medium
US20040240441A1 (en) Enabling packet switched calls to a wireless telephone user
US20070153753A1 (en) Method of allocating mobile station identifiers in a distributed radio access network
KR100447197B1 (en) Method for Controlling Routing of Access Point Name in Gateway General packet radio service Support Node
EP1290848B1 (en) Ip address allocation in a mobile telecommunications network
US20050237990A1 (en) Data transmission method and system
CN101938526A (en) Obtaining method of routing policy, terminal and server
KR20020044902A (en) Operation system and method for all ip network of mobile communication system
US20070286095A1 (en) Redundant session information for a distribution network
KR20050118597A (en) Method for managing gtp tunnel in umts network
KR20060011354A (en) Mobile ip system and the method for the same using dynamic ip assignment based on diameter in broadband wireless communication system such as wibro
Kang et al. Dynamic bandwidth adaptation using Mobile IP in hybrid cellular networks

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 99814616.1

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
ENP Entry into the national phase

Ref document number: 2000 588932

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 30898/00

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 1999964857

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1999964857

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWW Wipo information: withdrawn in national office

Ref document number: 1999964857

Country of ref document: EP