DE60105423D1 - Anrufsteuerungsgerät zur steuerung von drahtlosen verbindungen mit drahtlosen kommunikationsgeräten - Google Patents

Anrufsteuerungsgerät zur steuerung von drahtlosen verbindungen mit drahtlosen kommunikationsgeräten

Info

Publication number
DE60105423D1
DE60105423D1 DE60105423T DE60105423T DE60105423D1 DE 60105423 D1 DE60105423 D1 DE 60105423D1 DE 60105423 T DE60105423 T DE 60105423T DE 60105423 T DE60105423 T DE 60105423T DE 60105423 D1 DE60105423 D1 DE 60105423D1
Authority
DE
Germany
Prior art keywords
connections
control unit
communication devices
call control
transceiver
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE60105423T
Other languages
English (en)
Inventor
Simon Harrison
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Red M Communications Ltd
Original Assignee
Red M Communications Ltd
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
Priority claimed from GBGB0014431.1A external-priority patent/GB0014431D0/en
Application filed by Red M Communications Ltd filed Critical Red M Communications Ltd
Application granted granted Critical
Publication of DE60105423D1 publication Critical patent/DE60105423D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5691—Access to open networks; Ingress point selection, e.g. ISP selection
    • H04L12/5692—Selection among different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0896—Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/11—Identifying congestion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/15—Flow control; Congestion control in relation to multipoint traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/74—Admission control; Resource allocation measures in reaction to resource unavailability
    • H04L47/745—Reaction in network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/76—Admission control; Resource allocation using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions
    • H04L47/765—Admission control; Resource allocation using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions triggered by the end-points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/78—Architectures of resource allocation
    • H04L47/788—Autonomous allocation of resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/80—Actions related to the user profile or the type of traffic
    • H04L47/805—QOS or priority aware
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/822—Collecting or measuring resource availability data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/824—Applicable to portable or mobile terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/828—Allocation of resources per group of connections, e.g. per group of users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/04—Protocols specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • 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
    • H04L69/08—Protocols for interworking; Protocol conversion
    • 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
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H04L69/085—Protocols for interworking; Protocol conversion specially adapted for interworking of IP-based networks with other networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5003—Managing SLA; Interaction between SLA and QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/508—Network service management, e.g. ensuring proper service fulfilment according to agreements based on type of value added network service under agreement
    • H04L41/5087—Network service management, e.g. ensuring proper service fulfilment according to agreements based on type of value added network service under agreement wherein the managed service relates to voice services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/02—Details of telephonic subscriber devices including a Bluetooth interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)
  • Small-Scale Networks (AREA)
DE60105423T 2000-06-13 2001-06-13 Anrufsteuerungsgerät zur steuerung von drahtlosen verbindungen mit drahtlosen kommunikationsgeräten Expired - Lifetime DE60105423D1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0014431.1A GB0014431D0 (en) 2000-06-13 2000-06-13 Wireless network
GBGB0029540.2A GB0029540D0 (en) 2000-06-13 2000-12-04 Call handling device
PCT/GB2001/002612 WO2001097458A1 (en) 2000-06-13 2001-06-13 Call handling device for controlling wireless connections with wireless communications devices

Publications (1)

Publication Number Publication Date
DE60105423D1 true DE60105423D1 (de) 2004-10-14

Family

ID=26244475

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60105423T Expired - Lifetime DE60105423D1 (de) 2000-06-13 2001-06-13 Anrufsteuerungsgerät zur steuerung von drahtlosen verbindungen mit drahtlosen kommunikationsgeräten

Country Status (6)

Country Link
US (1) US20030176200A1 (de)
EP (1) EP1290830B1 (de)
AT (1) ATE275784T1 (de)
AU (1) AU6411201A (de)
DE (1) DE60105423D1 (de)
WO (1) WO2001097458A1 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1246399A1 (de) * 2001-03-29 2002-10-02 Nokia Corporation Verfahren und Gerät zur Priorisierung der Benutzung von Zeitschlitzen in einem drahtlosen Netzwerk
US7974260B2 (en) 2001-09-10 2011-07-05 Spyder Navigations L.L.C. Method of transmitting time-critical scheduling information between single network devices in a wireless network using slotted point-to-point links
US7747218B2 (en) * 2001-10-16 2010-06-29 Sony Corporation Communication system and method, and information processing apparatus and method
US7346357B1 (en) * 2001-11-08 2008-03-18 At&T Corp. Frequency assignment for multi-cell IEEE 802.11 wireless networks
US20030087645A1 (en) * 2001-11-08 2003-05-08 Kim Byoung-Jo J. Frequency assignment for multi-cell IEEE 802.11 wireless networks
KR100482004B1 (ko) 2002-07-27 2005-04-13 삼성전자주식회사 냉장고시스템 및 그 업그레이드방법
EP1416686A1 (de) * 2002-11-01 2004-05-06 Nokia Corporation Optimalisierung des Gebrauchs von einem Bluetooth Zugangspunkt-Netzwerk
US20040156351A1 (en) * 2002-12-02 2004-08-12 Samsung Electronics Co., Ltd. Apparatus and method for making QOS-supporting polling list
US7379958B2 (en) 2002-12-30 2008-05-27 Nokia Corporation Automatic and dynamic service information delivery from service providers to data terminals in an access point network
DE10315066B4 (de) * 2003-04-02 2006-06-01 Siemens Ag Verfahren zur Steuerung der Übertragung von Daten
WO2004104778A2 (en) * 2003-05-19 2004-12-02 Modular Computing & Communications Corporation Apparatus and method for mobile personal computing and communications
US20040248610A1 (en) * 2003-06-07 2004-12-09 Chan Christina Kwok-Han Multiple Contents Distribution System Over Wireless Local Area Network
US20050003854A1 (en) * 2003-07-01 2005-01-06 Sharma Vijay K. Single user device for receiving voice, text, video and graphical data from both wireless and wire-lined networks
AU2004301628B2 (en) * 2003-07-17 2008-05-15 Interdigital Technology Corporation Method and system for delivery of assistance data
US20050128977A1 (en) * 2003-07-23 2005-06-16 Interdigital Technology Corporation Method and apparatus for determining and managing congestion in a wireless communications system
US8005055B2 (en) * 2003-07-23 2011-08-23 Interdigital Technology Corporation Method and apparatus for determining and managing congestion in a wireless communications system
US7653017B2 (en) * 2004-01-30 2010-01-26 Stmicroelectronics N.V. Bluetooth sniff mode power saving
US7843867B2 (en) * 2005-02-04 2010-11-30 Toshiba America Research, Inc. Collaborative communication for wireless local area networks
US7636323B2 (en) * 2005-06-14 2009-12-22 Broadcom Corporation Method and system for handling connection setup in a network
US9338303B2 (en) * 2013-04-26 2016-05-10 Avaya Inc. Wireless enterprise congestion management
US10320616B2 (en) * 2015-12-15 2019-06-11 Wipro Limited Method and a system for sideband server management

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3456071B2 (ja) * 1995-09-29 2003-10-14 松下電器産業株式会社 無線電話装置
US5729531A (en) * 1995-10-18 1998-03-17 Telefonaktiebolaget Lm Ericsson Bandwidth allocation
US5991292A (en) * 1997-03-06 1999-11-23 Nortel Networks Corporation Network access in multi-service environment
US6160818A (en) * 1997-07-17 2000-12-12 At &T Corp Traffic management in packet communication networks having service priorities and employing effective bandwidths
US6216006B1 (en) * 1997-10-31 2001-04-10 Motorola, Inc. Method for an admission control function for a wireless data network
US6317607B1 (en) * 1999-06-14 2001-11-13 Qualcomm Inc. Method and apparatus for rejecting an over-the-air request for call initialization
US7145934B2 (en) * 2001-03-03 2006-12-05 Oxford Semiconductor Inc Multichannel signal transmission and reception for bluetooth systems

Also Published As

Publication number Publication date
WO2001097458A1 (en) 2001-12-20
AU6411201A (en) 2001-12-24
ATE275784T1 (de) 2004-09-15
US20030176200A1 (en) 2003-09-18
EP1290830B1 (de) 2004-09-08
EP1290830A1 (de) 2003-03-12

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