Nortel Networks Corporation

Apple Inc.

Sanjoy K Sen

Kalyan K Basu

Sean March

Tanuj Bagchi

Cedric Aoun

Jayshree Bharatia

Serge M Manning

Chung-Ching Wang

Glenn C Morrow

Venson M Shaw

Joseph S Ho

Indranil Bob Tapadar

Jastinder Singh Jawanda

Thinh Nguyen

Don L Jackson

Atul Suresh Joshi

Arun Arunachalam

Chiew-Leong Saw

Hrishikesh Gossain

Naveen K Kakani

Giri Giridharagopal

Sajal Das

M N Umesh

Suvanee Chirachanchai

Apurva Kumar

Enoch K Lee

Vaidhyanathan Arunachalam

A method of detecting proximity between a media proxy and a client uses a proximity probe to query a plurality of media proxies, forcing the media proxies to respond to a proximity server. The proximity server uses an algorithm to determine which media proxy is closest to the client based on the responses. In an alternate embodiment, the same sorts of proximity probes may be used to determine if two media endpoints have a direct connection such that they may bypass a media proxy.

Proximity detection for media proxies

A communications system includes a packet-based wireless network linked to mobile units and a circuit-switched network such as a public-switched telephone network (PSTN). A primary Packet Data Protocol (PDP) context is established with call setup that contains the default quality of service (QoS) profile of the call session. However, to support multiple flows with different QoS profiles, secondary PDP contexts with different QoS profiles may be activated in the call session. The secondary PDP context activation may be performed using messaging according to a protocol for reserving resources, such as the Resource Reservation Protocol (RSVP).

Establishing a communications session having a quality of service in a communications system

A next generation wireless data system and method for handoff from a node in a network is presented. The system includes a core network (CN) and a source and a target radio network subsystem (RNS). The interface between the RNSs is enhanced to reduce unnecessary relay of messaging through the CN and thus will reduce traversing delays as well as the resources utilized in message processing. Two separate methods are proposed for handing off the data traffic to the target RNS at the CN packet processing node. These methods are a multi-cast function that concurrently sends data to the source RNS and the target RNS, and a suspend/resume function which suspends the data flow towards the source RNS and resumes the flow towards the target RNS.

Handoff mechanisms to support real-time delay-critical services in a next generation network

A system and method of setting up a multi-user communication session over a global computer network are provided. The method includes first sending a session participation request message from a first user to a second user, where the session participation request message includes the first user's QoS requirements for the session. The second user then sends a negotiating message to the first user in response to receiving the session participation request message, where the negotiation message includes the second user's QoS requirements for the session responsive to the first user's QoS requirements. The resource availability in access networks of the first and second users according to the second user's QoS requirements is determined, and resources in the respective access networks of the first and second users are then reserved in response to resources being available to achieve the second user's QoS requirements. The first user thereafter sends an acknowledgement message to the second user in response to receiving the negotiating message to indicate the completion of QoS provisioning.

System and method for broadband multi-user communication sessions

Because consuming extensive processor resources to directly compress textual messages for transmission in a data communication network is viewed as undesirable, a method of message compression in accordance with the present invention applies simple tokenization to certain fields in a message and then combines at least two of the tokens to produce a compact tokenized message that is up to 30% smaller than the original message. Thereafter, the tokenized message can optionally be compressed further utilizing a standard compression algorithm, such as Lempel-Ziv 1977 (LZ77), to attain a substantial compression ratio. Applying a standard compression scheme, such as LZ77, after tokenization is not as processor-intensive as direct compression of the original message and can decrease the message size by an additional 10%.

Method and system for improving bandwidth availability in a data communication network by tokenizing messages

A classification application utilizing a table of connection numbers and associated TCP/IP applications is utilized for determining a wireless packet communication, quality of service level by decoding a connection number field of the compressed packet header. Packets carrying different connection numbers can be mapped to different Quality of Service planes. When a non-active TCP connection becomes active, the classification application detects and identifies the connection by reading the connection number field of a compressed TCP/IP header in a packet of the application. The classification application applies the appropriate Quality of Service level as determined from a user database and a list of available Quality of Service levels. If the connection has no table entry, the TCP/IP application is identified based on comparison to a pre-loaded table of port numbers and a new entry is created in the connection number table.

Method and apparatus for providing support for multiple QoS levels within a third generation packet data session

A mobile station communicates with an RSVP-aware network over an air interface standard that has a wireless quality of service standard. The mobile station transmits an RSVP message to an end terminal through the network's RSVP-enabled routers. The end terminal transmits an RESV response message back to the mobile station. A base station controller intercepts this message and sets up the wireless resources if possible.

End-to-end quality of service guarantee in a wireless environment

A next generation wireless data network and method for handing off a mobile node is presented. The network includes a core network (CN) coupled to a plurality of radio access networks (RANs). The RAN servicing the mobile node examines overload factors in the wireless data network while the CN examines admission capabilities to neighboring RANs. The wireless data network determines a traffic situation of the neighboring RANs and admits a new user to one of the neighboring RANs based on results of the examinations and the determination.

Handoff framework to support real-time delay-critical services in a next generation network

A wireless quality of service (QoS) agent for an all-Internet Protocol (IP) network. The QoS agent couples to an all-IP network. The coupling means includes communication means for transfer of information between the agent and a QoS manager of the all-IP network. The agent is also able to seamlessly extend QoS support for multimedia applications from wireline to wireless and control QoS of the multimedia applications sent over wireless connections on the all-IP network.

Method and system for wireless QOS agent for all-IP network

An adaptation sublayer is provided between LAC/MAC and a Packet Data Service Node for a Code Division Multiple Access telecommunication system. Quality of Service parameters are defined and stored within a Base Station and Base Transceiver Station along with subscriber profiles, including class of service. The profiles include specified Quality of Service requirements for each subscriber profile. A Quality of Service Adaptation Layer provides logic and control means to identify each active subscriber, provide the associated Quality of Service and direct the active subscriber's communication connection to a target host.

QoS framework for CDMA 2000

An improved method and system for limiting data packet transmission within a digital mobile telephone communication network, such as a code division multiple access (CDMA) mobile telephone communication network, by discarding unsuccessfully transmitted radio link protocol frames is disclosed. A code division multiple access (CDMA) mobile telephone communication network includes a mobile telephone, a base station, a mobile switching center, and a network Interworking Function. Within the CDMA mobile telephone communication network, each point-to-point protocol data packet is typically divided into multiple radio link protocol frames before their transmissions over an air link. In accordance with a method and system of the present invention, a marker bit is provided for each of the radio link protocol frames. The marker bit can be part of the frame header and will be removed before air link transmission. The marker bit of a first one of the radio link protocol frames is set to a first logical state (such as a logical &ldquo;1&rdquo;) and the rest of the radio link protocol frames are set to a second logical state (such as a logical &ldquo;0&rdquo;). In response to an unsuccessful transmission of one of the radio link protocol frames, all of the radio link protocol frames within the same point-to-point protocol data packet having the marker bit set to the second logical state are discarded, after a predetermined number of unsuccessful re-transmission attempts.

Method and system for limiting data packet transmission within a digital mobile telephone communication network by discarding unsuccessfully transmitted radio link protocol frames

A system and method for GPRS MAC procedures to support delay-sensitive, real-time traffic is presented. The system comprises a mobile station able to transmit packets to and receive packets from a base station, where the base station is coupled to a General Packet Radio Service (GPRS) network, and where the GPRS network is coupled to a data network. In an uplink dynamic scheme, the base station receives an empty packet from the mobile station. The base station releases a bandwidth allocated to the mobile station if an implementation dependent time expires and further allocates a reduced portion of the bandwidth to the mobile station if a number of the empty packets are received or if a control packet requesting additional bandwidth is received by the base station. In an uplink fixed scheme, the base station allocates a fixed number of radio resources to the mobile station. The base station releases the radio resources allocated to the mobile station, if the fixed number of radio resources are not utilized and further allocates a reduced bandwidth to the mobile station if a number of empty packets are received.

GPRS MAC procedures to support real-time services

A wireless communication system selectively delays serviced data communications to produce a desired level of voice communications capacity. The system first determines whether the wireless communication system has sufficient voice communications capacity. If it is determined that the wireless communication system has insufficient voice communications capacity, the system determines a data communications delay that is required to provide sufficient voice communications capacity. Based upon its determination, the system then selectively delays some or all of the data communications to create the sufficient voice communications capacity. In one operation, one data communication serviced by the wireless communication system is selectively delayed to create the sufficient voice communications capacity. In another operation, a plurality of data communications serviced by the wireless communication system are selectively delayed to create the sufficient voice communications capacity. When a plurality of data communications being serviced by the wireless communication system, some of the plurality of the data communications serviced by the wireless communication system are delayed by a first delay level and other of the data communications serviced are delayed by a second delay level.

Growing community of inventors

Plano, TX, United States of America

Sanjoy K Sen