WO2003079616A1 - Routeur sans fil a flux multiples, passerelle, systeme de communication et procede associe - Google Patents

Routeur sans fil a flux multiples, passerelle, systeme de communication et procede associe Download PDF

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Publication number
WO2003079616A1
WO2003079616A1 PCT/US2003/005573 US0305573W WO03079616A1 WO 2003079616 A1 WO2003079616 A1 WO 2003079616A1 US 0305573 W US0305573 W US 0305573W WO 03079616 A1 WO03079616 A1 WO 03079616A1
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Prior art keywords
gateway
router
communication system
network
channels
Prior art date
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PCT/US2003/005573
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English (en)
Inventor
Oscar Somerlock
Original Assignee
Oscar Somerlock
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 Oscar Somerlock filed Critical Oscar Somerlock
Priority to AU2003217683A priority Critical patent/AU2003217683A1/en
Priority to JP2003577483A priority patent/JP2005520436A/ja
Publication of WO2003079616A1 publication Critical patent/WO2003079616A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/14—Multichannel or multilink protocols

Definitions

  • One form of access to a wide area network (WAN) for communicating with a remote server employs a wireless network as one link between an end user device and the WAN.
  • the WAN may be the Internet or any other packet data network, and the end user device may be a personal
  • PDA personal digital assistant
  • the remote server can send packet data to a network and/or receive packet data from a network.
  • the remote server may
  • a web server any system capable of sending and receiving packet data via the WAN, such as a web server, a
  • gateway to a subnetwork or another end user device.
  • a user 26 may desire to communicate with a remote
  • One method for establishing such communication uses a
  • wireless network 46 which interfaces with the WAN 34.
  • User 26 utilizing an end user device 42, establishes a wireless communication channel 48 as an interface to the wireless network 46, thereby
  • the data transmission rate in the communication system of Fig. 1 is limited in part by the capacity of the wireless channel 48.
  • conventional wireless networks are designed so that the throughputs of wireless channels to end user devices are adequate for voice communication.
  • wireless networks have been designed to provide higher throughput for data but the
  • performance of the wireless channel is highly variable due to the nature of RF communications.
  • the present invention enables end users to experience consistent and reliable high-speed
  • Tunneling is a technology allowing a first network to transport its data via a second network
  • Tunneling is sometimes referred to as encapsulation since the- technique encapsulates the first networkDs protocol data units (PDUs) within PDUs defined to be earned by the second network.
  • PDUs protocol data units
  • Point-to-Point Tunneling Protocol a conventional tunneling technology, enables organizations to use the Internet to transmit data across virtual private networks (VPNs) by
  • Other known tunneling techniques include Layer 1
  • L2F Layer Two Forwarding
  • L2TP Layer Two Tunneling Protocol
  • networks in particular wireless networks, are designed such that packets destined for a given
  • IP address may reach that destination via one and only one physical channel.
  • IP address e.g. IP address
  • the present invention achieves greater throughput in communication systems employing an
  • intermediate network as a link between an end user device and a WAN.
  • intermediate network is a wireless network employing Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • the present invention also allows data transmissions to and from multiple end-users to be
  • the present invention also provides portability across different wireless and wired network technologies by using tunneling at the network layer.
  • Objects of the invention are achieved by providing a gateway and a router using tunneling to facilitate data transfer across multiple channels of an intermediate communications network for data
  • the intermediate network is preferably a wireless network
  • the intermediate network may also be a wired network.
  • the router may be mobile.
  • the gateway is preferably external to the wireless network, the gateway may also be configured as part of the wireless network's interface to a packet switched network. Also, the tunneling may extend instead
  • the router and/or the gateway may facilitate channel resource allocation, as well as throughput and transmission delay monitoring to achieve a desired quality of service. While multiple channels are preferred, the use of varying numbers of channels or even a single channel is possible, such as for concentrating transmission of data packets to/from multiple devices across a shared pool of channels, or for changing from multiple channels to a different number of channels or to even just one channel to adjust for varying throughput requirements.
  • a wired or wireless LAN may be used to connect one or more end user devices to the router.
  • Fig. 1 depicts a conventional communication system employing an intermediate network (e.g. a wireless network) as a link between an end user device and a remote server accessible through a WAN;
  • an intermediate network e.g. a wireless network
  • Fig. 2 depicts a preferred embodiment of the present invention
  • Fig. 3 depicts a single multi-stream gateway interacting with multiple multi-stream routers
  • Fig. 4 depicts another embodiment of the .present invention in which the multi-stream gateway communicates with the intermediate network through the WAN;
  • Fig. 5 depicts another embodiment of the present invention in which the multi-stream gateway is located within the intermediate network
  • Fig. 6 depicts internal layers of the multi-stream router and the multi-stream gateway and the use of IP-in-IP tunneling
  • Fig. 7 depicts a feedback loop between the multi-stream router and the multi-stream gateway
  • Fig. 8 illustrates flow of data within the multi-stream router
  • Fig. 9 illustrates flow of data within the multi-stream gateway
  • Fig. 10 depicts internal layers of the multi-stream router and the multi-stream gateway and the use of a single wireless channel for consolidation of data packets
  • Fig. 11 depicts internal protocol layers of the multi-stream router and the multi-stream gateway and the use of IP-in-IP tunneling with asymmetric wireless channels;
  • Fig. 12 illustrates the conventional UMTS.protocol stack for packet switched data
  • Fig. 13 depicts a UMTS protocol architecture modified for the present invention
  • Fig. 14 illustrates the conventional CDMA-2000 protocol stack for packet switched data
  • Fig. 15 depicts a CDMA-2000 packet data protocol architecture modified for the present invention.
  • Fig. 16 depicts another embodiment of the present invention in which the multi-stream router and multi-stream gateway communicate via multiple intermediate networks
  • Fig. 17 illustrates an example packet format for tunneling downlink data
  • Fig. 18 illustrates an example packet format for tunneling uplink data
  • the present invention is directed to communication systems employing an intermediate
  • the intermediate network may be a wireless network or a wired network. Increased throughput is obtained from multiple channel
  • each individual communication channel need accommodate only a fraction of the total data flow, the total throughput is not limited to the capacity of an individual channel.
  • the intermediate network is a wireless network employing Wideband Code
  • WCDMA Code Division Multiple Access
  • range In a WCDMA wireless network, higher speed channels typically have a shorter range than lower speed channels.
  • range refers to the distance the end-user device can be from the
  • the present invention also allows data transmissions to and from multiple end-users to be concentrated over a single channel of the intermediate network.
  • the intermediate network In the case where the intermediate
  • WCDMA wireless network is a WCDMA wireless network, concentrating data transmissions to or from multiple users over a single higher speed channel, as opposed to employing a distinct lower speed channel for each
  • the present invention also provides portability across different wireless and wired network
  • IP Internet Protocol
  • IP IP version 4
  • IP version 6 IP version 6
  • the present invention is compatible with both versions of the Internet
  • the present invention may employ any connectionless or connection-oriented network layer protocol provided that protocol provides a means for point-to-point communication between two
  • This point-to-point communication may be facilitated by the
  • tunneling is achieved by encapsulating data packets within a network PDU with header information that specifies a source and a destination network address
  • An end user device and the remote system with which it is communicating (herein referred to
  • invention may obtain the network address for one another using
  • the gateway may also be integrated with other technologies to implement, for example, Domain Name System or static IP address assignments.
  • These methods may include, for example, Domain Name System or static IP address assignments.
  • the gateway may also be integrated with other technologies to implement, for example, Domain Name System or static IP address assignments.
  • a mobile IP foreign agent or virtual private network gateway for example, a mobile IP foreign agent or virtual private network gateway.
  • the intermediate network is a Public Switched Telephone Network
  • channel may refer to a full duplex, dedicated connection using copper telephone wires between a dialup modem within the multi-stream router and an Internet Service Provider's modem bank. If the intermediate network is an WCDMA wireless network, the term "channel"
  • a WCDMA dedicated traffic channel is a "logical" channel and may itself be an aggregation of physical resources, but it is regarded as a single channel within the context of the
  • Some wireless networks employ a technique known as "frequency hopping" where a communication channel changes frequencies a ' t specific time intervals; such a channel is also
  • New techniques e.g. CDMA High Data Rate
  • CDMA High Data Rate may aggregate resources at the physical layer to provide increased spectral
  • the present invention is compatible with such techniques, as well as other present or future communication data link techniques, an m y be se in concert with these techniques to provide even greater throughput to end-user devices and further
  • the hardware platform used to implement the multi-stream router must provide sufficient resources (e.g. modems, transmitters, receivers, etc.) to support simultaneous operation of the desired number of
  • the intermediate network(s) being employed must also provide sufficient resources to
  • a network interface e.g. physical layer standards and network protocol
  • the communication system utilizes a multi-stream router and a corresponding multi-stream gateway tunneling packets across multiple channels therebetween.
  • Such a system provides greater throughput to a wireless device versus the device accessing the wireless network directly, due to the ability to send and receive data packets over multiple communication channels in place of a single channel. Also, the present invention is portable over
  • IP Internet Protocol
  • the remote server 30 and destined for the end user device 42 (or multiple end user devices 42a, as
  • Multi-stream gateway 50 flow through the WAN 34 to a multi-stream gateway 50.
  • Multi-stream gateway 50 flow through the WAN 34 to a multi-stream gateway 50.
  • IP header referred to herein as a
  • multi-stream router 54 and the wireless network 46 are examples of the multi-stream router 54 and the wireless network 46.
  • multi-stream gateway 50 to enable their distribution over multiple downlink channels 48a to the
  • the multi-stream gateway 50 appends an additional header to each
  • additional header includes a destination IP address, which is one of a plurality of IP addresses recognized by the wireless network and associated with the multi-stream router 54.
  • the destination IP address is one of a plurality of IP addresses recognized by the wireless network and associated with the multi-stream router 54.
  • IP address in the added header corresponds to a particular downlink wireless channel 48a.
  • gateway may effectively distribute a stream of IP packets, all destined for the same end-user device, over a plurality of wireless channels by tunneling a subset of these packets to each IP address associated with the multi-stream router 54.
  • the multi-stream router 54 interfaces with the wireless network 46 using multiple wireless communication channels 48 (48a and 48b). Each IP address of the multi- stream router 54 is accessed over a different wireless channel 48 (e.g., downlink wireless channels
  • the multi-stream gateway 50 for data packets flowing in the direction from the multi-stream gateway 50 to the multi-stream router 54, referred to here as DdownlinkD data packets, the multi-stream gateway
  • IP address will typically be made based on, for example, the current status
  • the multi-stream gateway 50 obtains information on channel status and conditions by way of information (e.g. MUX Info messages 140 of Fig.7) sent periodically by the multi-stream router 54.
  • information e.g. MUX Info messages 140 of Fig.7
  • the multi-stream router 54 Upon receipt of downlink data packets, the multi-stream router 54 de-tunnels the packets by
  • the communication system may be configured so that multi-stream router 54
  • LAN local area network
  • LAN 58 may be a wired LAN
  • Ethernet standards such as one using Ethernet standards, or it may be wireless, such as one using IEEE 802.11 or
  • the router 54 may also interface with only one end user device
  • the multi-stream router 54 receives uplink data packets directly from the end user device 42 or indirectly from the end user devices 42a through the LAN 58.
  • multi-stream router 54 then distributes the uplink data over the multiple uplink channels 48b to the multi-stream gateway 50, which forwards the data through the WAN 34 to the remote server 30.
  • the multi-stream gateway 50 In a manner analogous to the manner employed by the multi-stream gateway 50 to append a
  • the multi-stream router 54 appends a header to uplink data packets.
  • the header includes as its destination address an IP address associated with the multi-stream
  • the multi-stream router also selects a wireless channel over which to transmit each
  • Such selection of a particular channel will typically be made based on, for example, the current status and channel conditions of each wireless channel accessible by the router.
  • the multi-stream gateway 50 de-tunnels the packets by removing the additional header added by the multi-stream router 54 and forwards them to their destination as
  • distributed is used herein to describe the process of routing data originating from or destined for a single network address over multiple links for at least part of the path to their
  • an end user subsystem 59 may include one end user device 42 connected
  • the end user subsystem 59 may be mobile by virtue of the wireless interface with the multi-stream gateway 50. Therefore, the end user subsystem 59 can provide access
  • the end user subsystem 59 need not be mobile, however, and still provide
  • the communication system in Fig.2 maybe implemented to obtain greater throughput to the WAN 34 by virtue of the use of the multiple wireless communication channels 48.
  • the communication system is portable across various wireless technologies. By distributing data at the IP layer, this system may use any
  • UMTS such as UMTS (WCDMA), CDMA2000, GPRS/EDGE, GSM/HSCSD,
  • the multi-stream gateway 50 may sit outside the wireless network infrastructure of the wireless
  • implementation of the multi-stream gateway 50 does not require modification of
  • WAN need not use the same network layer protocol.
  • Fig. 3 illustrates a second preferred embodiment of the invention.
  • gateway 50 may serve a plurality of multi-stream routers 54a.
  • independent Internet service provider equipped with a multi-stream gateway 50 may serve multiple
  • subscribers such as common carriers or individual end users, each equipped with a multi-stream router 54a.
  • the multi-stream router 54 and the multi-stream gateway 50 may be modified as appropriate so that end user subsystem 59 obtains access to the WAN 34 using a wired land-based network (e.g.
  • the multi-stream gateway 50 and the end user subsystem 59 would then tunnel packets through the land-based public telephone network.
  • Such a configuration may be desirable when no high-throughput WAN access, such as
  • DSL digital subscriber line
  • Fig. 4 illustrates a third preferred embodiment of the invention. Unlike the embodiments illustrated in Figs. 2 and 3, data packets flowing between the wireless network 46 and the WAN 34
  • the communication link 60 is not limited to a single physical channel and may use any
  • multi-stream gateway 50 may also reside within the wireless network 46, as illustrated in Fig. 5.
  • wireless networks have their own interfaces that connect directly to the WAN.
  • a UMTS compliant network has a gateway GPRS support node (GGSN).
  • GGSN gateway GPRS support node
  • the compliant network has a packet data services node (PDSN).
  • PDSN packet data services node
  • the multi-stream gateway 50 functionality may be implemented on the same hardware platform as the GGSN or the PDSN.
  • intermediate network 46 to facilitate communication between the multi-stream router 54 and multi-
  • a single user's data may be distributed simultaneously
  • intermediate network 46 and yield higher throughput than is possible using a single intermediate
  • the intermediate networks 46a-46z employed need not use the same physical layer
  • Fig. 6 illustrates exemplary architecture for the multi-stream router 54 and the multi-stream
  • gateway 50 how data flows therein. For simplicity, only two uplink and two downlink wireless
  • stream router 54 includes an IP router 65, a MUX sublayer 66, and an IP protocol sublayer 67.
  • multi-stream gateway 50 includes a gateway application 68 and an IP protocol layer 69. hi both the
  • the protocol layers below IP in the protocol stack are specific to the underlying wireless network and WAN technologies being used.
  • the multi-stream router 54 and the multi-stream gateway 50 distribute tunneled data packets
  • Tunneled packets 52 are received by the IP-MUX sublayers 66, 67 in the multi-stream router 54 and at the gateway application 68 in the multi-stream gateway 50.
  • the wireless network 46 administers
  • the wireless network 46 administers and recognizes the IP addresses that the multi-stream router 54 uses as source addresses in tunnel headers when tunneling uplink packets.
  • the wireless network 46 administers and recognizes the IP
  • the gateway application 68 uses an IP address known to the multi-stream router 54.
  • the multi-stream router 54 may use a number of different methods for determining the IP address(es) of the multi-stream gateway 50.
  • the IP address of the multi-stream gateway 50 may be statically configured in the multi-
  • the multi-stream router 54 may then indicate its own IP address(es) to the multi-
  • stream gateway 50 by sending a MUX Info message 140. More elaborate methods may also be used.
  • the present invention is not limited to any one specific method for determining the IP address(es) of
  • the multi-stream gateway 50 the multi-stream gateway 50.
  • IP packets 70 are tunneled to the gateway application 68. In the downlink direction, IP packets 70
  • the gateway application 68 receives the downlink IP
  • the gateway application 68 then chooses an available IP
  • downlink packet is then encapsulated by appending another IP header (tunnel header) which specifies the selected IP address as the destination address.
  • Wireless link conditions typically change during communication sessions. Such an effect is
  • the multi-stream router 54 monitors
  • the multi-stream router 54 must request
  • the multi-stream router 54 monitors the resource allocations to detect congestion on individual channels, cells, or sectors of the wireless network 46.
  • the multi-stream router 54 also monitors other communication aspects such as channel error rates. Based on the channel status (e.g.
  • the multi-stream router 54 determines the optimal distribution of uplink data
  • the multi-stream gateway 50 is external to the wireless network
  • the multi-stream gateway 50 cannot monitor channel resource allocations in the same
  • the multi-stream router 54 monitors channel resource allocations. Therefore, the multi-
  • stream router 54 periodically sends to the multi-stream gateway 50 feedback information (i.e. MUX
  • Info messages 140 which includes currently allocated downlink or forward channel resources, error
  • included is a list of available IP addresses within the multi-stream router 54 that are not currently
  • the multi-stream gateway 50 uses this feedback information to optimize its data distribution when tunneling downlink packets to a plurality of IP addresses associated with a multi-stream router 54.
  • FIG. 7 A preferred embodiment of such a feedback loop is illustrated in Fig. 7. In this scenario,
  • the multi-stream gateway 50 is distributing data destined
  • the arrows representing wireless communication channels 48a that carry tunneled downlink packets 52a indicate the direction of
  • the multi-stream router 54 sends feedback information (i.e. MUX Info
  • wireless communication channel 48b indicates the direction of uplink data flow. Based on feedback
  • the multi-stream gateway 50 optimizes its distribution of tunneled downlink packets 52a among the downlink channels 48a.
  • both the multi-stream gateway 50 and the multi-stream router 54 are identical to the multi-stream gateway 50 and the multi-stream router 54.
  • QoS quality of service
  • the multi-stream gateway 50 and the multi-stream router 54 may distribute data to efficiently
  • Fig. 8 shows the data distribution within the multi-stream router 54.
  • Fig. 9 shows the data distribution within the multi-stream gateway 50.
  • the various functions work together to provide desired QoS for all user traffic and to optimally utilize the wireless spectrum.
  • the multi-stream router 54 receives incoming data packets 74b from an end user device, possibly via a router 65. As illustrated in Fig. 8, the incoming data packets 74b are subjected to a rate control
  • Rate control function 80b receives a notification 84b from a resource management function 88b
  • the rate control function 80b can appropriately throttle data flow to avoid excessive queuing of
  • the throttled data packets are then processed as indicated
  • a scheduling function 96b determines how to distribute data packets optimally over uplink wireless channels 48b, based in part on a resource
  • scheduling function 96b would be to reschedule packets queued for transmission over a channel experiencing an excessively high error
  • Each data packet 104b is enqueued on a message queue 108b corresponding
  • function 88b monitors packet levels in queues 108b based on queue information 112b therefrom.
  • the resource management function 88b uses queue information 112b to determine the amount and
  • the resource management function 88b requests the
  • the resource management function 88b utilizes the services
  • Layer 2/MAC 128 provided by Layer 2/MAC 128 to request and receive resource allocations from the wireless network.
  • the resource management function 88b sends a threshold notification 84b to the rate control function
  • Packets 116b from the queues 108b flow to a dispatch function 120b, which de-queues the queued packets 116b that are awaiting transmission.
  • the dispatch function 120b de-queues the queued packets 116b that are awaiting transmission.
  • data packets from one or more end-users are aggregated into streams based on QoS requirements of the packets and distributed over a pool of one or more channels based on the capacity and status of the channels and the QoS supported by the channels.
  • the multi-stream gateway 50 receives incoming data packets 70a from a remote server via a
  • the incoming data packets 70a are subjected to a rate control
  • IP layer 130 cannot accept data packets for transmission at a high
  • Rate control function 80a receives a notification 84a from a resource management function 88a
  • the rate control function 80a can appropriately throttle data flow to avoid excessive queuing of packets within the multi-stream router 54 and multi-stream gateway 50.
  • the throttled data packets are then processed as indicated in Fig. 9 by arrows 92a to a scheduling function 96a.
  • function 96a determines how to distribute data packets optimally over downlink wireless channels 48a, based in part on a resource profile 100a received from a resource management function 88a and on the QoS requirements of the packets.
  • An exemplary action of scheduling function 96a would be to reschedule packets queued for transmission over a channel experiencing an excessively high error rate to another channel.
  • the resource profile 100a is derived from the MUX Info 140 sent by the
  • the resource profile 88a contains information about each downlink channel 48a (e.g. such as maximum throughput and the most recently measured frame error rate). Associated
  • each downlink channel 48a is one or more IP addresses that may be reached via that channel.
  • each data packet 104a is enqueued on a
  • resource management function 88a monitors packet, levels in queues 108a based on queue
  • the resource management function 88a uses queue information 112a to determine the amount and type of wireless resources needed to provide the desired QoS. The resource management function 88a also considers the current error rate being experienced on the
  • downlink wireless channels 48a when allocating resources. Based on current downlink channel conditions, downlink packet traffic volume, and QoS requirements the resource management function 88a determines what IP addresses to make available to the scheduling function 96a for
  • the resource management function 88a sends a threshold notification
  • Packets 116a from the queues 108a flow to a dispatch function 120a, which de-queues the queued packets 116a that are awaiting transmission.
  • a dispatch function 120a de-queues the queued packets 116a that are awaiting transmission.
  • the dispatch function 120a appends the appropriate tunnel headers and forwards the de-queued packets 124a to the IP Layer 69.
  • data packets from one or more remote servers are aggregated into streams based on QoS requirements of the packets and, by way of tunneling,
  • the intermediate network 46 is a WCDMA wireless
  • wireless channel can yield greater overall system capacity since higher speed channels have a lower
  • Fig. 10 illustrates a preferred embodiment in which a single channel meets data flow rate
  • Data packets from one or more end user devices are concentrated (multiplexed) onto a
  • the multi-stream router 54 receives data packets from one or more
  • Each uplink data packet has an IP header containing addresses corresponding to its IP header
  • the multi-stream router 54 encapsulates the data packets with an additional IP header (referred to herein as a tunnel header) containing a destination address for the multi-stream gateway 50 and then sends the data packets to the multi-stream gateway 50 over the IP header (referred to herein as a tunnel header) containing a destination address for the multi-stream gateway 50 and then sends the data packets to the multi-stream gateway 50 over the IP header (referred to herein as a tunnel header) containing a destination address for the multi-stream gateway 50 and then sends the data packets to the multi-stream gateway 50 over the
  • Each tunnel header added by multi-stream router 54 has the same source IP address, the address corresponding to the wireless channel being used, because only one uplink
  • the multi-stream gateway 50 receives the tunneled uplink packets 52b, strips off the tunnel header that was appended by the multi-stream router 54 and then routes the packets via the. WAN according to the parameters in their original IP
  • the multi-stream gateway 50 receives data packets from one or
  • Each downlink data packet has an IP header containing addresses
  • the multi-stream gateway 50 encapsulates
  • multi-stream router 54 and then sends the data packets to the multi-stream router 54 via the WAN 34
  • Each tunnel header added by multi-stream gateway 50 contains the same
  • the MUX sublayer 66 inside the multi-stream router 54 receives the packets, strips off the tunnel header that was appended
  • the multi-stream gateway 50 routes the packets to their destination according to the
  • Fig. 6 portrays an embodiment of the invention using multiple wireless channels
  • Fig. 10 portrays an embodiment of the invention using multiple wireless channels
  • multi-stream router and the multi-stream gateway may also include the capability to change the number of channels to be used, either increasing or decreasing the number, according to packet traffic volume, QOS requirements and resource availability.
  • channels as symmetric (i.e. the same number of uplink and downlink wireless channels are in use).
  • the usage of wireless channels may also be asymmetric, that is, the number of uplink channels 48b
  • aggregate uplink throughput may be different than the number of downlink channels 48a and
  • Such functionality may be useful, for example, when it would be optimal to allocate a
  • FIG. 11 illustrates an example of such an allocation!
  • tunneling is used with asymmetric channel
  • UMTS Universal Mobile Telecommunications System
  • Fig. 12 shows the standard UMTS user-plane protocol stack for packet switched data.
  • Fig. 13 illustrates how the UMTS protocol architecture may be adapted to support the
  • a new layer is added to the UE protocol stack. This layer
  • source address for the selected wireless channel 48 destination address for the serving multi-stream gateway 50, and setting other header fields as required to ensure desired QoS for payload data
  • a gateway application layer 68 uses the services of a standard
  • the multi-stream gateway 50 is external to the wireless service
  • the multi-stream gateway 50 is connected directly to the WAN (e.g. Internet)
  • Gateway application layer 68 provides the following functions:
  • a significant difference between the IP/MUX layer 66, 67 in the multi-stream router and the gateway application layer 68 in the multi-stream gateway 50 is that the multi-stream router 54 can
  • multi-stream gateway 50 uses feedback (MUX Info 140) from the multi-stream router 54 for its distribution and multiplexing
  • tunneling before it is transmitted across the wireless network. This is because an IP address can be associated with only one mobile terminal identifier in the UMTS network. Since UMTS mobile
  • router sends an uplink packet, it uses the IP source address corresponding to the radio link over which the packet is sent. Similarly, downlink packets sent by the multi-stream gateway must contain the destination IP address corresponding to the radio link over which those packets are sent.
  • PDCP Packet Data Compression Protocol
  • a method to further reduce protocol overhead is to encapsulate multiple discrete IP packets
  • the intermediate network e.g. UMTS network
  • Figs. 17 and 18 illustrate example structures for tunneled downlink and uplink packets using IP-in-IP
  • IP packets 261a-261n, 263a-263n with various source and destination IP addresses maybe encapsulated with a single tunnel header 260, 262 to create a single
  • a tunnel packet 264, 265 is routed through the intermediate network (and possibly the WAN) as single packet so it is subject to fragmentation if the total length of the tunnel packet 264, 265 exceeds the maximum transmit unit size of any network it traverses.
  • multi-stream gateway 50 and multi-stream router 54 consider the QoS parameters in each packet being encapsulated. Only packets sharing identical QoS parameters are encapsulated with a shared
  • tunnel header 260, 262 The QoS parameters in the tunnel header 260, 262 are set by the multi- stream gateway 50 and multi-stream router 54 to match the QoS parameters of the encapsulated
  • the packet data network architecture is very similar for UMTS, GPRS and EDGE based
  • Fig. 14 provides a basic overview of the standard CDMA-2000 packet data architecture.
  • CLNP Connectionless Network Layer Protocol
  • IP Internet Protocol
  • Fig. 15 illustrates ' how the CDMA-2000 protocol using IP as the network layer protocol may
  • IP/MUX layer 66, 67 is
  • This layer provides the following functions:
  • a gateway application layer 68 is appended to the CDMA-2000 IP layer 69. Also in these
  • the multi-stream gateway 50 is external to the wireless service providerOs network.
  • the multi-stream gateway 50 is connected directly to the Internet, and it implements a standard IP
  • Gateway application layer 68 provides the following functions:
  • the gateway application layer 68 in the multi-stream gateway 50 is that the multi-stream router 54 can measure wireless channel allocations and performance directly, whereas the multi-stream
  • gateway 50 uses feedback (MUX Info 140) from the multi-stream router for its distribution and
  • router sends a reverse link packet, it uses the IP source address corresponding to the radio link over

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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne une communication et un procédé (Fig. 2) comprenant une passerelle (50) et un routeur (59) utilisant une couche de réseau se profilant dans un ou plusieurs canaux (48a, 48b et 52a, 52b) d'un réseau de communication intermédiaire (46) destiné à des paquets de données envoyés entre des dispositifs utilisateurs d'extrémité (42a) communicant via ledit réseau intermédiaire (46) et un serveur éloigné (30) connecté à un WAN (34). Ce système permet à des données d'un utilisateur unique d'être diffusées sur plusieurs canaux (48a, 48b et 52a, 52b), produisant un débit élevé maximal et, dans des réseaux sans fil CDMA, une gamme améliorée de liaisons montantes et descendantes. Des données acheminées vers plusieurs utilisateurs et à partir de ceux-ci peuvent également être agrégées et concentrées sur un groupe partagé de canaux ou même sur un seul canal, augmentant ainsi la capacité du système dans des réseaux sans fil CDMA. Ce système est un système portatif dans plusieurs réseaux câblés et sans fil et peut utiliser divers protocoles de couche de réseau. Des ressources de réseau sont attribuées et désattribuées en fonction des besoins, de manière à garantir un fonctionnement efficace du réseau tout en conservant une qualité de services suffisante des données utilisateurs.
PCT/US2003/005573 2002-03-11 2003-03-05 Routeur sans fil a flux multiples, passerelle, systeme de communication et procede associe WO2003079616A1 (fr)

Priority Applications (2)

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AU2003217683A AU2003217683A1 (en) 2002-03-11 2003-03-05 Multi-stream wireless router, gateway, communication system, and method therefor
JP2003577483A JP2005520436A (ja) 2002-03-11 2003-03-05 マルチストリーム無線ルータ、ゲートウェイ、通信システム、およびそれによる方法

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US36296302P 2002-03-11 2002-03-11
US60/362,963 2002-03-11
US29469002A 2002-11-15 2002-11-15
US10/294,690 2002-11-15

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007143421A2 (fr) * 2006-05-31 2007-12-13 Honeywell International Inc. Appareil, système et procédé pour intégrer dans un réseau sans fil des dispositifs de terrain câblés dans un système de commande de procédé
WO2007143421A3 (fr) * 2006-05-31 2008-02-07 Honeywell Int Inc Appareil, système et procédé pour intégrer dans un réseau sans fil des dispositifs de terrain câblés dans un système de commande de procédé
US7675935B2 (en) 2006-05-31 2010-03-09 Honeywell International Inc. Apparatus and method for integrating wireless or other field devices in a process control system
US7876722B2 (en) 2006-05-31 2011-01-25 Honeywell International Inc. System and method for wireless communication between wired field devices and control system components
US7889747B2 (en) 2006-05-31 2011-02-15 Honeywell International Inc. Apparatus, system, and method for integrating a wireless network with wired field devices in a process control system
US7965664B2 (en) 2006-05-31 2011-06-21 Honeywell International Inc. Apparatus and method for integrating wireless field devices with a wired protocol in a process control system
US8266602B2 (en) 2006-05-31 2012-09-11 Honeywell International Inc. Apparatus and method for converting between device description languages in a process control system
US8756412B2 (en) 2010-04-16 2014-06-17 Honeywell International Inc. Gateway supporting transparent redundancy in process control systems and other systems and related method
US8498201B2 (en) 2010-08-26 2013-07-30 Honeywell International Inc. Apparatus and method for improving the reliability of industrial wireless networks that experience outages in backbone connectivity
US8924498B2 (en) 2010-11-09 2014-12-30 Honeywell International Inc. Method and system for process control network migration
US9239574B2 (en) 2011-06-30 2016-01-19 Honeywell International Inc. Apparatus for automating field device operations by capturing device method execution steps for later use and related method
US9191843B2 (en) 2013-06-12 2015-11-17 Honeywell International Inc. Apparatus and method for measuring and reporting redundant wireless connectivity over time
US9110838B2 (en) 2013-07-31 2015-08-18 Honeywell International Inc. Apparatus and method for synchronizing dynamic process data across redundant input/output modules
US9448952B2 (en) 2013-07-31 2016-09-20 Honeywell International Inc. Apparatus and method for synchronizing dynamic process data across redundant input/output modules
US9612587B2 (en) 2014-02-11 2017-04-04 Honeywell International Inc. Mobile extension for industrial operator consoles
US9720404B2 (en) 2014-05-05 2017-08-01 Honeywell International Inc. Gateway offering logical model mapped to independent underlying networks
US10042330B2 (en) 2014-05-07 2018-08-07 Honeywell International Inc. Redundant process controllers for segregated supervisory and industrial control networks
US9609524B2 (en) 2014-05-30 2017-03-28 Honeywell International Inc. Apparatus and method for planning and validating a wireless network
US10536526B2 (en) 2014-06-25 2020-01-14 Honeywell International Inc. Apparatus and method for virtualizing a connection to a node in an industrial control and automation system
US9699022B2 (en) 2014-08-01 2017-07-04 Honeywell International Inc. System and method for controller redundancy and controller network redundancy with ethernet/IP I/O
US10148485B2 (en) 2014-09-03 2018-12-04 Honeywell International Inc. Apparatus and method for on-process migration of industrial control and automation system across disparate network types
US10153827B2 (en) 2015-01-27 2018-12-11 Fujitsu Limited Communication apparatus and data relay method
US10162827B2 (en) 2015-04-08 2018-12-25 Honeywell International Inc. Method and system for distributed control system (DCS) process data cloning and migration through secured file system
US10409270B2 (en) 2015-04-09 2019-09-10 Honeywell International Inc. Methods for on-process migration from one type of process control device to different type of process control device
US10296482B2 (en) 2017-03-07 2019-05-21 Honeywell International Inc. System and method for flexible connection of redundant input-output modules or other devices

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