WO2008084305A2 - Découverte automatique d'éléments de réseau dans un réseau sans fil large bande - Google Patents

Découverte automatique d'éléments de réseau dans un réseau sans fil large bande Download PDF

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Publication number
WO2008084305A2
WO2008084305A2 PCT/IB2007/003854 IB2007003854W WO2008084305A2 WO 2008084305 A2 WO2008084305 A2 WO 2008084305A2 IB 2007003854 W IB2007003854 W IB 2007003854W WO 2008084305 A2 WO2008084305 A2 WO 2008084305A2
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WO
WIPO (PCT)
Prior art keywords
advertisement
network element
broadband wireless
wireless network
field
Prior art date
Application number
PCT/IB2007/003854
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English (en)
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WO2008084305A3 (fr
Inventor
Alexaneder Bachmutsky
Original Assignee
Nokia Corporation
Nokia, Inc.
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 Nokia Corporation, Nokia, Inc. filed Critical Nokia Corporation
Publication of WO2008084305A2 publication Critical patent/WO2008084305A2/fr
Publication of WO2008084305A3 publication Critical patent/WO2008084305A3/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • the present invention relates to wireless communications and radio network technology. More specifically, the present invention relates to automatic procedures for network configuration of a wireless broadband network such as, for example, a Worldwide Interoperability for Microwave Access (WiMAX) or Long Term Evolution (LTE) network.
  • a wireless broadband network such as, for example, a Worldwide Interoperability for Microwave Access (WiMAX) or Long Term Evolution (LTE) network.
  • WiMAX Worldwide Interoperability for Microwave Access
  • LTE Long Term Evolution
  • WiMAX Worldwide Interoperability for Microwave Access
  • IEEE Institute of Electrical and Electronics Engineers
  • One embodiment of the present invention can be an apparatus.
  • the apparatus can include a sender module configured to send a first broadband wireless apparatus advertisement as a broadcast or multicast message.
  • the apparatus can also include a receiver module configured to receive a second broadband wireless apparatus advertisement from another apparatus.
  • the sender module can be configured to send a third broadband wireless apparatus advertisement to the another apparatus as a unicast message.
  • One embodiment of the present invention can be an apparatus.
  • the apparatus can include sender means for sending a first broadband wireless apparatus advertisement as a broadcast or multicast message.
  • the apparatus can also include receiver means for receiving a second broadband wireless apparatus advertisement from another apparatus.
  • the sender means can be configured to send a third broadband wireless apparatus advertisement to the another apparatus as a unicast message.
  • One embodiment of the present invention can be a method.
  • the method can include sending a first broadband wireless network element advertisement as a broadcast or multicast message.
  • the method can also include receiving a second broadband wireless network element advertisement from another network element.
  • the method can further include sending a third broadband wireless network element advertisement to the another network element as a unicast message.
  • One embodiment of the present invention can be a computer program embodied on a computer readable medium and encoding instructions for performing a method.
  • the method can include sending a first broadband wireless network element advertisement as a broadcast or multicast message.
  • the method can also include receiving a second broadband wireless network element advertisement from another network element.
  • the method can further include sending a third broadband wireless network element advertisement to the another network element as a unicast message.
  • Figure 1 presents a WiMAX network diagram.
  • Figure 2 illustrates a network element advertisement extension in accordance with an embodiment of the present invention.
  • Figure 3 illustrates a network element according to an embodiment of the present invention.
  • Figure 4 illustrates a method in accordance with an embodiment of the present invention.
  • Figure 5 illustrates a network element advertisement extension in accordance with another embodiment of the present invention.
  • Figure 6 provides an example embodiment of a network in which certain embodiments of the present invention can be implemented.
  • WiMAX Worldwide Interoperability for Microwave Access
  • NE network elements
  • major network elements can include a Base
  • a WiMAX network can be created with an hierarchical architecture.
  • a set of BSs are connected to an ASN-GW using interface known as a logical R6 Reference Point.
  • ASN-GWs are interconnected using logical R4 Reference Point and HA/AAA are connected to ASN-GWs using logical R3 Reference Point.
  • Every BS can be connected to multiple ASN-GWs concurrently, which adds complexity to the overall architecture.
  • ASN-GWs can also be interconnected with complex R4 connectivity.
  • the R4 connectivity can range from pure chain connectivity to full mesh connectivity and can encompass everything in between those types of connectivity.
  • ASN-GWs can be connected to none, some, or all of the HAs and AAAs. There can also be another interface. This interface can be between BSs and can be referred to as an R8 Reference Point.
  • a single network element can include multiple WiMAX entities, which makes the analysis of the network more complicated.
  • WiMAX entities are typically defined by function, leaving the precise physical implementation up to the manufacturers.
  • WiMAX Network Working Group (NWG) profile B defines a so-called flat architecture in which a single NE can include both BS and ASN-GW functionalities.
  • WiMAX NWG profile B can be, in some ways, similar to Internet high-speed packet access (I- HSPA), in that it can flatten or simplify network access from a mobile device.
  • Figure 6 provides an example embodiment of a network in which certain embodiments of the present invention can be implemented.
  • an Access Service Network shown on the left side of the figure, and a Connectivity Service Network (CSN) can work together to provide services to, for example, mobile stations (MSS).
  • MSS mobile stations
  • the MSS can interact with a base station (BS) functionality through a reference point Rl.
  • Rl can include a set of protocols and procedures between MSS and the ASN as per the air interface (including the physical layer (PHY) and the media access control layer (MAC)) specifications from Institute of Electrical and Electronics Engineers (IEEE) 802.16.
  • Rl can also include additional protocols related to the management plane.
  • a third reference point R3 (shown as R3a and R3b) can include a set of control plane and bearer plane protocols for internetworking between ASN and CSN.
  • the bearer plane can include IP tunnels between the ASN and CSN.
  • the control plane can include protocols for IP tunnel establishment and release control in accordance with the MSS mobility events.
  • the control plane also includes the protocols for authentication, authorization, and accounting (AAA), policy, and quality of service (QoS) enforcement coordination between the ASN and CSN.
  • AAA authentication, authorization, and accounting
  • QoS quality of service
  • a fourth reference point R4 (shown as R4a and R4b) can include a set of control plane and bearer plane protocols that coordinate inter- ASN GW mobility.
  • a fifth reference point R5 can include a set of control plane and bearer plane protocols for internetworking between the CSN operated by the home network service provider (NSP) and that operated by a visited NSP.
  • the bearer plane can include IP tunnels between the CSN operated by the home NSP and that operated by the visited NSP.
  • the control plane can include protocols for IP tunnel establishment and control in accordance with the MSS mobility events (handovers).
  • the control plane can include the protocols for AAA and policy coordination between the CSN operated by the home NSP and that operated by the visited NSP.
  • a sixth reference point R6 (shown as R6a and R6b) can include a set of control and bearer plane protocols for internetworking between the BS and the ASN GW.
  • the bearer plane can include tunnels between the BS and the ASN GW.
  • the control plane can include protocols for IP tunnel establishment and release control in accordance with the MSS mobility events.
  • the control plane can also include protocols for, for example, AAA, bandwidth brokering, or policy coordination in the BS as well as other protocols for, for example, radio resource management and the like.
  • a seventh reference point R7 can include an optional set of control plane protocols for coordination between the two groups of functions.
  • an eighth reference point R8 can include a set of control and bearer plane protocols for internetworking between the Base Stations in order to ensure fast and seamless handover.
  • the bearer plane can include protocols that allow data transfer between base stations involved in handover of a certain MS.
  • the control plane can include inter-BS communication protocols and an additional set of protocols that allow controlling the data transfer between the base stations involved in the handover of a certain MS.
  • Certain embodiments of the present invention provide mechanisms for automatically configuring network element interconnections. Thus, in certain embodiments of the present invention, conventional manual configuration of a broadband wireless network, such as WiMAX, can be obviated.
  • every BS in the network can be configured with all neighboring BSs for R8 connectivity automatically.
  • every BS can be automatically configured with all serving ASN-GWs for R6 connectivity.
  • every ASN-GW can, automatically, be configured with all served BSs for R6 connectivity, and, thus, each ASN-GW can support hundreds of BSs.
  • another embodiment of the present invention can automatically configure every ASN- GW with all neighboring ASN-GWs for R4 connectivity. This automatic configuration could result in a veiy large number of connections in a full mesh configuration.
  • every ASN-GW can be configured with all HAs and AAAs.
  • Certain embodiments of the present invention may implement automatic configuration using a mechanism that is similar to RFC3344. This mechanism, however, may be used for the discovery of network elements in a broadband wireless access network, such as a WiMAX network.
  • the automatic configuration can be provided using Internet Control Message Protocol (ICMP) router discovery combined with an extension that is specific to a broadband wireless access network, such as a WiMAX-specific extension.
  • ICMP Internet Control Message Protocol
  • a similar extension can be used with different transport, for example, user datagram protocol (UDP) (in one embodiment with a WiMAX reserved port and corresponding WiMAX header) or any other transport protocol, such as transmission control protocol (TCP) or streaming control transmission protocol (SCTP).
  • UDP user datagram protocol
  • TCP transmission control protocol
  • SCTP streaming control transmission protocol
  • WiMAX NE auto-discovery can be implemented to run on top of ICMP router discovery, which is described in more detail in RFC 1256.
  • the WiMAX NE auto-discovery can also include a broadband wireless access network element advertisement extension, such as a WiMAX network element advertisement extension.
  • a similar extension can be used with a different transport protocol, such as, for example, UDP (in one embodiment with a WiMAX reserved port and corresponding WiMAX header) or any other transport protocol, such as, for example, TCP or SCTP.
  • Network element advertisements such as WiMAX network element advertisements, can be sent using the sending network element's internet protocol (IP) address as a source and either an "all systems on this link" multicast address (for example, 224.0.0.1) or a broadcast address (for example, 255.255.255.255) as a destination.
  • IP internet protocol
  • network element advertisements such as WiMAX network element advertisements
  • address would need to be known somehow.
  • Knowledge of the unicast address could be obtained either from prior configuration or from a previously received network element advertisement, such as another WiMAX Network Element Advertisement.
  • a newly added network element would be configured to advertise itself to the network using a multicast or broadcast IP address.
  • existing network elements would, in such embodiments, advertise themselves to the newly added network element using the unicast address listed as the source address in the network element's own multicast/broadcast network advertisement packet.
  • a network element such as a WiMAX network element advertisement
  • a network element advertisement such as a WiMAX network element advertisement
  • a network element could have a separate user plane and control plane, with corresponding separate IP addresses.
  • certain embodiments of the present invention can include all user plane IP addresses in a standard ICMP portion of the packet in a "Router Address(es)" field.
  • similar information can be provided on top of UDP or other transport protocol (such as, for example, TCP, SCTP, and the like) as shown in Figure 5.
  • the ICMP message "Num Addrs" field can be set to zero. Otherwise, the ICMP "Num Addrs" field can be set to the number of addresses provided in the "Router Address(es)" field. In other embodiments similar information can be provided on top of UDP or another transport protocol (such as, for example, TCP, SCTP, or the like) as shown in Figure 5 by field "Num User Plane Addresses” and corresponding "zero or more User Plane Addresses.”
  • All control plane IP addresses can be specified using a broadband wireless network element advertisement extension, such as a WiMAX network element advertisement extension.
  • a broadband wireless network element advertisement extension such as a WiMAX network element advertisement extension.
  • An example of such an advertisement extension is shown in Figure 2.
  • the fields of the extension can include: [0050] Type - The content of this field be a suitable type indication. The precise content of this field may be standardized in the future. [0051] Length - The content of this field may be a value, (6 + 4*N), in which 6 accounts for the number of bytes in the Sequence Number, Registration Lifetime, flags, and reserved fields, and N is the number of Control Plane addresses advertised.
  • Sequence Number The content of this field can be a number of network element advertisement messages, such as WiMAX network element advertisement messages, sent since the start of the network element.
  • NE can start sending its advertisement messages with the Sequence Number equal to zero.
  • Each advertisement message cab then be sent with Sequence Number equal to the previous Sequence Number incremented by one.
  • An exception to the incremental increase of the value for Sequence Number can be in a rollover case.
  • the number Oxfffff (or any other suitable maximum value) can be followed by a predetermined nonzero value, such as, for example, number 0x100. The use of the predetermined non-zero number can help to differentiate between a start (or restart) and rollover.
  • receiving the Sequence Number set to zero for a known NE could suggest that this NE was restarted for some reason.
  • receiving the Sequence Number set to zero for a known NE can indicate that the NE has experienced a change, such as a change in IP address or a change in configuration.
  • the NE could have added or divested a network functionality such as home agent (HA) functionality.
  • HA home agent
  • the network element could send out an initial advertisement every time there is a change or restart, in addition to being sent out when the network element is started.
  • Registration Lifetime The content of this field can be the time in seconds that this element should be kept listed as a valid network element (for example, a WiMAX NE) in tables of other network elements.
  • the value of OxFFFF, or another predetermined value can be used to indicate infinity (i.e. that the element should be kept listed as a valid network element indefinitely).
  • the network element can be configured to send out a new advertisement message at a predetermined time in order to refresh the validity of the network element's listing, in the case that the time period of validity is not infinite.
  • H - This field can be a flag that indicates Home Agent (HA) functionality. In certain embodiments, if Home Agent functionality is included in this NE the field can be set to one, otherwise it can be set to zero.
  • a - This field can be a flag that indicates authentication and authorization server (AAA) functionality. In certain embodiments, if AAA server functionality is included in this NE the field can be set to one, otherwise it can be set to zero.
  • B - This field can be a flag that indicates Base Station (BS) functionality. In certain embodiments, if Base Station functionality is included in this NE the filed can be set to one, otherwise it can be set to zero.
  • BS Base Station
  • G - This field can be a flag that indicates access service network gateway (ASN-GW) functionality. In certain embodiments, if ASN-GW functionality is included in this NE the field can be set to one, otherwise it can be set to zero
  • N - This field can be a flag that indicates busy/overload flag.
  • the meaning of this flag being set to a true value can be that this NE should not be used for any new connections.
  • r - This field can be a reserved bit.
  • Control Plane Addresses can provide a listing of the IP addresses used for control plane. In some embodiments, if the same address is used for both user plane and control plane, provision of the control plane IP address can be omitted. In general, however, at least one address (either for user plane or for control plane) should be provided in the advertisement message.
  • FIG. 3 illustrates an embodiment of the present invention, which can be a network element 300.
  • the network element 300 can include a sender module 310 configured to send a first broadband wireless network element advertisement as a broadcast or multicast message.
  • the network element 300 can also include a receiver module 320 configured to receive a second broadband wireless network element advertisement from another network element (not shown).
  • the sender module 310 can be configured to send a third broadband wireless network element advertisement to the another network element as a unicast message.
  • the network element 300 can also include a processor 330 configured to process signals and information, and provide instructions to the sender module 310 and receiver module 320.
  • the network element 300 can additionally include a communication device, such as antenna 340, for communicating with other network elements.
  • the processor 330 can be implemented as a computer that includes a computer readable medium encoding instructions for performing a method.
  • the processor 330 can take the form, for example, of a general purpose computer or an application specific integrated circuit.
  • the processor 330 can be provided with suitable interfaces for communicating external to the network element 300 and for interacting with a local memory include caches, tables, and the like.
  • the sender module 310 and the receiver module 320 can be implemented in hardware, software, or a hybrid of hardware and software.
  • the sender module 310 can be configured to broadcast the first advertisement to a broadcast internet protocol address.
  • the sender module 310 can alternatively or additionally be configured to multicast the first advertisement to a multicast internet protocol address.
  • the sender module 310 can also be configured to unicast the third advertisement to a previously known internet protocol address.
  • the previously known internet protocol address can be determined by the processor 330 from information contained in the second advertisement.
  • the network element 300 can be configured to provide the third advertisement in response to the second advertisement when an address in the second advertisement indicates that the another network element was previously unknown. Whether the another network element was previously unknown can be determined by the processor 330, which may compare the source address in the advertisement message with a table contained in a memory (not shown) of the network element 300. Alternatively or additionally, the network element 300 can be configured to provide the third advertisement in response to a solicitation request.
  • the first advertisement can be configured to include a type field, a length field, a sequence number field, a registration lifetime field, flags, a number of control plane addresses advertised, and the control plane address(es), if any.
  • the first advertisement can also include one or more reserved bits.
  • the processor 330 can be configured to prepare the first advertisement based on data stored in a portion of memory, such as a configuration table, of the network element 300.
  • the first advertisement can be configured to include a user plane address of the network element 300 in a router address field of a portion of an internet control message protocol packet.
  • the network element 300 may not have a user plane address, particularly if the network element 300 is an ASN-GW control plane.
  • the length field can be configured to indicate a value that is 6 + 4 * N bytes, wherein N represents the number of control plane addresses advertised.
  • the sequence number field can be configured to indicate the number of broadband wireless network element advertisements sent since the start of the network element 300.
  • the sequence number can be configured to be a predetermined value to indicate a rollover, and the predetermined value can be a value other than zero.
  • the registration lifetime field can be configured to indicate the time in seconds that the network element 300 should be considered valid based on the advertisement.
  • the registration lifetime field is configured to a predetermined value for infinite.
  • the processor 330 of the network element 300 can be configured to update a registration table in the memory of the network element 300 in accordance with the data found in the registration lifetime field. This step may be performed any time a network element advertisement message is received.
  • the flags in the advertisement message can be configured to indicate functionality of the network element 300.
  • the functionality of the network element 300 can be at least one of a base station, an access service network gateway, a home agent, or an authentication and authorization server.
  • Figure 4 is a flow chart of a method according to an embodiment of the present invention. As shown in Figure 4, the method can include sending 410 a first broadband wireless network element advertisement as a broadcast or multicast message. The method can also include receiving 420 a second broadband wireless network element advertisement from another network element. The method can further include sending 430 a third broadband wireless network element advertisement to the another network element as a unicast message.
  • the method can include broadcasting the first advertisement to a broadcast internet protocol address.
  • the method can, alternatively, include multicasting the first advertisement to a multicast internet protocol address.
  • the method can include unicasting the third advertisement to a previously known internet protocol address.
  • the method can include obtaining the previously known internet protocol address from the second advertisement.
  • the sending 430 the third advertisement can be performed in response to the second advertisement when an address in the second advertisement indicates that the another network element was previously unknown. Alternatively, the sending 430 the third advertisement can be performed in response to a solicitation request.
  • the method can include configuring the first advertisement to include a type field, a length field, a sequence number field, a registration lifetime field, flags, a number of control plane addresses advertised, and the control plane address(es), if any.
  • the method can also include configuring the first advertisement to include a user plane address in a router address field of a portion of an internet control message protocol packet.
  • the method can include configuring the length field to indicate a value that is 6 + 4 * N bytes, wherein N represents the number of control plane addresses advertised.
  • the method can also include configuring the sequence number field to indicate the number of broadband wireless network element advertisements sent since the start of the network element.
  • the method can further include configuring the sequence number to a predetermined value for a rollover, wherein the predetermined value is not zero.
  • the method can include configuring the registration lifetime field to indicate the time in seconds that the network element should be considered valid based on the advertisement.
  • the method can also include configuring the registration lifetime field to a predetermined value for infinite.
  • the method can further include configuring the flags to indicate functionality of the network element.
  • the method can additionally include providing a reserved bit in the first advertisement message.
  • the method can be configured to be performed in at least one of a base station, an access service network gateway, a home agent, or an authentication and authorization server.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)

Abstract

Certains modes de réalisations de la présente invention portent sur des mécanismes permettant de configurer automatiquement les interconnections entre éléments d'un réseau. Ainsi, selon certains modes de réalisation de la présente invention, la configuration manuelle conventionnelle d'un réseau sans fil large bande de type WiMAX ou LTE par exemple n'est plus nécessaire.
PCT/IB2007/003854 2006-12-29 2007-12-10 Découverte automatique d'éléments de réseau dans un réseau sans fil large bande WO2008084305A2 (fr)

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US87761706P 2006-12-29 2006-12-29
US60/877,617 2006-12-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010066147A1 (fr) * 2008-12-08 2010-06-17 华为技术有限公司 Procédé, système et appareil d'enregistrement
WO2013011439A1 (fr) * 2011-07-15 2013-01-24 Renesas Mobile Corporation Procédé et appareil pour établir une interface intra-système

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WO2001076151A2 (fr) * 2000-03-31 2001-10-11 Nortel Networks Limited Annonce d"un agent de monodiffusion base sur la detection de mouvement dans la couche 2 et la couche 3

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010066147A1 (fr) * 2008-12-08 2010-06-17 华为技术有限公司 Procédé, système et appareil d'enregistrement
WO2013011439A1 (fr) * 2011-07-15 2013-01-24 Renesas Mobile Corporation Procédé et appareil pour établir une interface intra-système

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