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WO2002009454A2 - Systeme et procede pour combiner plusieurs synchroniseurs de mise a jour periodique - Google Patents

Systeme et procede pour combiner plusieurs synchroniseurs de mise a jour periodique Download PDF

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Publication number
WO2002009454A2
WO2002009454A2 PCT/EP2001/008613 EP0108613W WO0209454A2 WO 2002009454 A2 WO2002009454 A2 WO 2002009454A2 EP 0108613 W EP0108613 W EP 0108613W WO 0209454 A2 WO0209454 A2 WO 0209454A2
Authority
WO
WIPO (PCT)
Prior art keywords
message
messages
pdsn
packet data
base station
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.)
Ceased
Application number
PCT/EP2001/008613
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English (en)
Other versions
WO2002009454A3 (fr
Inventor
Babu Arunachalam
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to AU2001287652A priority Critical patent/AU2001287652A1/en
Publication of WO2002009454A2 publication Critical patent/WO2002009454A2/fr
Publication of WO2002009454A3 publication Critical patent/WO2002009454A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • This invention relates generally to the field of wireless communications and, more particularly, to a system and method of combining a plurality of periodic keep alive messages into a common timer to reduce system overhead in the monitoring of packet data communications.
  • packets As is well known, data is commonly transferred into information grouping called packets.
  • the packets have ' a defined length (number of bits).
  • the packets can include preambles which uniquely identify each packet and provide the packet destination.
  • Each packet may also organize the data to include error correction coding or encryption.
  • the binding of information into packets makes for efficient communication as a network resource need not be solely committed to a single interface pair. That is, multiple simultaneous communications can be conducted on the same line between packet data switching networks (PDSNs). Individual communications can then be routed from the PDSN to a user.
  • PDSNs packet data switching networks
  • Internet communications is one example of packet data communications.
  • Internet communications consist of times when large amounts of data must be downloaded in a short amount of time, such as when the user requests a picture or video file, along with times when no data is being communicated, such as when the user is studying previously downloaded information. It is desirable that the user's link to the PDSN be maintained in the times when no information is being transferred, as it is annoying for the user to wait for link to be established. It also consumes system resources and overhead to reestablish a network link for every communication.
  • the IS-95 and IS-2000 code division multiple access (CDMA) wireless communication standards provide for the communication of packet data to the mobile station or remote units.
  • a mobile switching center MSC
  • MSC mobile switching center
  • BSC base station controller
  • Packet data is passed from the PDSN to the BSC, and the BSC communicates the packet data through a wireless link to the mobile station.
  • the BSC may communicate with multiple mobile stations in multiple cells through base transceiver stations (BTSs).
  • BTSs base transceiver stations
  • the link status is obvious. However, there are times when the link status between the PDSN and the mobile station is ambiguous, such as when packet data is not being actively transferred (dormant state). When the link is being maintained, even though no packet data is being transferred, the BSC sends the PDSN an Al 1 "keep alive" registration request message.
  • the All message is a form of verification, from the BSC to the PDSN, that the packet data link to the mobile station is still alive.
  • the Al 1 message is request to maintain a packet data link between the BSC and the PDSN.
  • the Al 1 message is sent periodically to maintain the status quo of the calls.
  • the period between Al 1 updates is configurable, dependent of a value set at the PDSN. It is important to maintain the packet data link if more data is to be transferred in the immediate future, as it takes time and wireless system resources to reestablish the call. However, it is wasteful of radio resources to maintain a link to a mobile station that is no longer communicating.
  • a significant amount of system overhead is spent in tracking and the transmitting these Al 1 messages.
  • a single BSC may interface between hundreds of mobile stations and the PDSN, so that hundreds of All message transmissions are required every update period. Since each of these messages is on a different update schedule, the BSC operates a unique timer for every message
  • a method for organizing the transmission of periodic update messages is provided.
  • the method can be embodied as a set of machine executable instructions which comprise: coalescing a plurality of messages, where each message has a periodic update period, into a message group; transmitting the message group periodically; and, initializing a master timer.
  • the message group can be transmitted periodically with the elapse of a first period of time on the master timer.
  • a plurality of timers is coalesced into a single timer. The update period of each of the plurality of messages to synchronized to match the first period of time.
  • the method comprises: coalescing the new message into the message group; in response to coalescing the new message, transmitting the message group; and, following the transmitting of the message group, reinitializing the master timer.
  • the method is applicable to a CDMA wireless communication system including mobile stations, with a connection to a packet data switching network (PDSN). Then, coalescing a plurality of messages includes coalescing a plurality of Al 1 messages into an Al 1 message group, and transmitting the message group includes transmitting a group of Al 1 messages using a common timer.
  • PDSN packet data switching network
  • a wireless communications base station system for organizing the transmission of periodic Al 1 update messages comprises a base station having a transceiver to communicate Al 1 messages and a register for coalescing a plurality of Al 1 messages into an Al 1 message group.
  • the register periodically supplies the Al 1 message group for transmission after a first period of time elapses from a master timer.
  • the master timer is initialized following the transmission of the message group.
  • the base station also includes a monitor to generate the plurality of Al 1 messages.
  • the monitor When the monitor generates a new Al 1 message, the register coalesces the plurality of Al 1 messages by adding the new message to the Al 1 message group and reinitializes the master timer.
  • FIG. 1 is a schematic block diagram of a wireless communications system which processes Al 1 registration request messages (prior art).
  • Fig. 2 illustrates timing considerations in the transfer of Al 1 messages (prior art).
  • Fig. 3 illustrates the timing considerations in the present invention communications system which maintains a master timer for a plurality of periodic update, or Al 1 registration request messages.
  • Fig. 4 illustrates the present invention base station for organizing the transmission of periodic update messages in a wireless communications system.
  • Fig. 5 is a timing diagram which illustrates the present invention system for adding a new message into the coalesced plurality of messages.
  • Fig. 6 is a flowchart illustrating a method for organizing the transmission of periodic update messages in a wireless communications base station.
  • Telecommunication systems use a periodic abstract handshake between two protocol endpoints to check the linkage between those entities. It is customary to perform handshakes between each instance of a dormant packet data call at the BSC, or packet control function (PCF), and at the PDSN in an IS-2000 system.
  • PCF packet control function
  • This invention describes an effective way to do these link checks without running a timer for each dormant call, and is effective for any distributed system with handshaking between entities. All the timers, for every periodic update or handshaking event, are coalesced into a single timer.
  • Fig. 1 is a schematic block diagram of a wireless communications system which processes Al 1 registration request messages (prior art).
  • the system 100 includes a BSC (PCF) 102 connected to a PDSN 104 on line 106.
  • the BSC 102 is shown connected to cell 1 (108), cell 2 (110), and cell 3 (112).
  • the BSC 102 is shown connected to BTSs 114, 116, and 118.
  • a BTS is communicating with a mobile station through a wireless link.
  • BTS 114 is communicating with mobile station 120
  • BTS 116 is communicating with mobile station 122
  • BTS 118 is communicating with mobile station 124.
  • These wireless communications involve the establishment of packet data information link through BSC 102 to PDSN 104.
  • the packet data call When data is actively being transferred between a mobile station and the PDSN, the status of the link is known to the PDSN. However, when no packet data is being transferred, the packet data call is dormant and the link status is unknown to the PDSN.
  • a mobile station wireless call can be setup between a mobile station and its corresponding BTS, and the remote can be waiting to make another packet data transfer. From the dormant state the call to the mobile station can be torn down by the system, and the packet data link is no longer needed. Alternately, a dormant call can become active, making the data link active.
  • the BSC (PCF) sends a periodic keep alive message (Al 1 Registration Request) to the PDSN for every dormant packet data call in the system. Since the calls could have originated at different times and gone dormant at different times, every dormant call is tracked with a separate timer in the system at the PCF and at the PDSN. At the expiration of each timer at the PCF, a keep alive message is sent to the PDSN. This results in multiple messages and multiple timers must be operated for the purpose of maintaining the dormant calls in the system.
  • Fig. 2 illustrates timing considerations in the transfer of Al 1 messages
  • the BSC sends a registration request (Al 1) message for a first mobile station.
  • the BSC sends a registration request message for second mobile station.
  • the BSC sends a registration request message for a third mobile station.
  • the BSC sends an Al 1 message for a fourth mobile station.
  • T seconds from tO the BSC sends another registration request message for the first mobile station.
  • the BSC sends requests every T seconds for each mobile station host in the system. This process is repeating as long as a call is active.
  • Fig. 3 illustrates the timing considerations in the present invention communications system which maintains a master timer for a plurality of periodic update, or Al 1 registration request messages.
  • the BSC sends the first periodic registration request for the first mobile station.
  • the BSC sends the first periodic registration request for the second mobile station.
  • the BSC sends a registration request for a third mobile station.
  • the BSC implicitly sends another registration request for the first and second mobile stations as well.
  • the BSC sends a registration request for all four mobile stations. From that time on, as long as no new message events occur, the registration request messages are synchronized together from time t3.
  • Fig. 4 illustrates the present invention base station for organizing the transmission of periodic update messages in a wireless communications system.
  • the base station is presented as combination of hardware blocks it should be understood that all, or some, of the functions performed by these hardware blocks can be performed in a computer based software application.
  • the first base station 140 is shown connected to a switching network 142 and to communication units 144, 146, and 148.
  • the first base station has a transceiver 150 connected to at least one port to communicate messages with the switching network 142, and with units 144-148.
  • a register 152 is included for coalescing a plurality of messages, where each message has an update period, into a message group, as explained in the description of Fig. 3.
  • the register 152 has a port connected to the transceiver 150 to periodically supply the message group for transmission.
  • the switching network 142 has a port connected to the first base station 140 to receive the message group transmissions.
  • a master timer 154 is connected to the register 152, and the first base station 140 initializes the master timer following the transmission of the message group.
  • the register 152 supplies the message group to the transceiver 150 for transmission after a first period of time (T, see Fig. 3) elapses on the master timer 154. As shown in Fig. 3, the register 152 coalesces the plurality of messages into a message group by synchronizing the update period of each message to the first period of time (T).
  • a monitor 156 has an output connected to the register 152 to supply the plurality of messages, where each message has an update period that is greater than, or equal to, the first period of time. That is, the first period of time (T) is selected so that it is smaller than, or equal to, any of the individual message update periods.
  • the first period of time T can be selected to be as short as a few seconds, to as long as several minutes. The invention imposes no timing limitations, the first time T can be adjusted to work within system and PDSN constraints.
  • Fig. 5 is a timing diagram which illustrates the present invention system for adding a new message into the coalesced plurality of messages.
  • T the message group of coalesced messages is transmitted.
  • time tl a new message is generated and coalesced into the message group.
  • the addition of the new message causes a timing change.
  • the first time period (T) is reinitialized to start at tl.
  • the message group is repeated every T seconds after that. This process continues as long as all the calls are active. If a call gets torn down, a new message is generated and the registration request during the teardown implicitly acknowledges all other active calls in the system. This process tends to align the master timer for periodic handshakes continuously to the earliest message before the expiration of T seconds, and after the last message was sent.
  • the register 152 coalesces the plurality of messages by adding the first message to the message group and reinitializing the master timer 154.
  • the register 152 supplies the message group for transmission when the master timer 154 is reinitialized.
  • the first base station transceiver 150 also communicates with the plurality of units 144-148. Specifically, the communication involves the transfer of packet data.
  • the monitor 156 generates a message in response to establishing communications with a corresponding unit. That is, the monitor generates an update message (periodically) for each unit from the plurality of units 144-148 in communication with the first base station 140.
  • the invention described in Figs. 3-5 is applicable to any communication system that transfers periodic update messages. However, the invention is especially applicable to a CDMA wireless commumcation system.
  • the units 144-148 are mobile stations (not as shown).
  • the first base station transceiver 150 communicates packet data with the plurality of mobile stations 144-148.
  • the first base station 140 would be a BSC or BTS with a monitor 156 that generates a plurality of Al 1 registration request messages in response to packet data communications with the plurality of mobile stations 144-148.
  • the register 152 coalesces the plurality of Al 1 messages into an Al 1 message group for transmission to the PDSN 142.
  • units 144-148 are BTS base stations in communication (wirelessly) with mobile stations. As shown, base station 148 is communicating with a mobile station 158, and base station 144 is communicating with mobile station 160. Also, the switching network 142 would be a packet data switching network (PDSN). Then, the first base station transceiver 150 communicates packet data with the plurality of mobile stations 144-148, such as mobile stations 158 and 160, through their corresponding base stations 148 and 144, respectively. Each base station 144-148 has a transmitter to send Al 1 messages to the first base station 140, which is a master base station (BSC). In this embodiment the monitor 156 of the first (master) base station 140 does not necessarily generate the Al 1 messages. The master base station transceiver 150 accepts the All messages from the plurality of base stations 144-148 and the register 142 coalesces the Al 1 messages from the plurality of base stations into an Al 1 message group for transmission to the PDSN 142.
  • BSC master base station
  • Fig. 6 is a flowchart illustrating a method for organizing the transmission of periodic update messages in a wireless communications base station. Although the method is presented as a sequence of numbered steps for clarity, no order should be inferred in the process unless explicitly stated.
  • the method can be embodied in software code written as a set of machine executable instructions that can be stored in an electrical or optical medium.
  • the method begins at Step 200.
  • Step 202 coalesces a plurality of messages, each having a periodic update period, into a message group.
  • Step 204 is a product where the message group is periodically transmitted.
  • coalescing the plurality of messages into a message group in Step 202 includes synchronizing the update period of each of the plurality of messages to the first period of time.
  • a further step 205 initializes a master timer. Then, as suggested by the operation of decision block 206, Step 204 transmits the message group after a first period of time elapses on the master timer.
  • Step 201b generating a plurality of messages, where each message has an update period that is greater than, or equal to, the first period of time.
  • the method includes a procedure to add new members to the coalesced message group.
  • Step 208 generates a first message with an update period. If the message is new, Step 202 coalesces the first message into the message group, and in response to coalescing the first message, Step 204 transmits the message group. Following the transmission of the message group in Step 204, a further step, Step 205 reinitiahzes the master timer. Each new call setup, call teardown, or call reactivation from the dormant state is considered a new message that can be used to reinitialize the master timer, implicitly causing a handshake for each dormant call in the system. That is, the entire message group is sent in response to adding a new message, and the timer reinitialized.
  • Step 201a establishes communications with a plurality of units.
  • generating a plurality of messages in Step 201b includes generating each message from the plurality of messages in response to establishing communications with a corresponding unit from the plurality of units.
  • the present invention method can be embodied in a CDMA wireless communication system including mobile stations, with a connection to a packet data switching network (PDSN). Then, establishing communications with a plurahty of units 201a includes communicating packet data to a plurality of mobile stations. Generating a plurality of messages in Step 201b includes generating a message in response to packet data communications with a corresponding mobile station. Transmitting the message group in Step 204 includes transmitting a group of All registration request messages.
  • PDSN packet data switching network
  • the CDMA communication system includes a base station transferring packet data between the mobile stations and the PDSN. Then, coalescing the plurality of messages in Step 202 includes the base station coalescing Al 1 messages, and transmitting the message group in Step 204 includes the base station transmitting the group of Al 1 messages to the PDSN.
  • the CDMA communication system includes a plurality of base stations and a master base station. Then, establishing communications with the plurality of mobile stations in Step 201a includes estabhshing communications with the mobile stations through the base stations, and the step includes each base station transmitting Al 1 messages to the master base station in response to the base station-mobile station communications. Coalescing the plurality of messages in Step 202 includes the master base station coalescing the Al 1 messages from the plurahty of base stations into an Al 1 message group, and transmitting the Al 1 message group in Step 204 includes the master base station transmitting the Al 1 message group to the PDSN.
  • the interpretation of the registration request messages at the BSC and PDSN is different than in conventional interpretations.
  • the invention can be used in any telecommunication system doing keep alive messaging between two sets of entities, each residing on a different hardware platform and connected by one physical link. One keep alive between two hardware platforms connected by one physical link suffices to replace multiple messages.
  • This intent is accomplished by having a central software entity check the validity of each active call before sending the periodic request or a registration request.
  • dormant mode calls when no data is being sent between the PCF and PDSN, it is a waste of network resources and bandwidth to send multiple messages across the link and run multiple timers.
  • a proxy entity for each hardware platform at the PCF can send the registration requests to a forwarding entity, which sits at the edge of the BSC network and communicates with the PDSN.
  • the same architecture can be used at the PDSN.
  • a tree of proxies can reduce the overall messaging to approximately the number of physical links used to form the tree within the PCF or the PDSN, while the number of messages across the PCF-PDSN interface remains the same, independent of the architecture within the PCF and PDSN.

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

Abstract

L'invention concerne un procédé de combinaison de plusieurs synchroniseurs de messages en un seul synchroniseur, ce procédé étant destiné à des systèmes de communications mettant en oeuvre le transfert de données par paquets. Le groupage de plusieurs synchroniseurs -chacun correspondant à la période de mise à jour d'un message particulier- réduit la surcharge du système et simplifie le traitement des messages. Une utilisation pratique du procédé se situe dans les demandes d'enregistrement A11 faites dans un système de télécommunications sans fil AMCR aux fins de conservation de l'état actif d'une liaison avec un réseau de commutation de données par paquets. L'invention concerne également un système de mise en oeuvre du procédé ci-dessus.
PCT/EP2001/008613 2000-07-26 2001-07-25 Systeme et procede pour combiner plusieurs synchroniseurs de mise a jour periodique Ceased WO2002009454A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001287652A AU2001287652A1 (en) 2000-07-26 2001-07-25 System and method for coalescing multiple periodic update timers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US62563300A 2000-07-26 2000-07-26
US09/625,633 2000-07-26

Publications (2)

Publication Number Publication Date
WO2002009454A2 true WO2002009454A2 (fr) 2002-01-31
WO2002009454A3 WO2002009454A3 (fr) 2002-05-30

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AU (1) AU2001287652A1 (fr)
WO (1) WO2002009454A2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009067061A1 (fr) * 2007-11-22 2009-05-28 Telefonaktiebolaget L M Ericsson (Publ) Procédé pour enregistrer un terminal mobile dans un système de communication radio mobile
EP1926327A4 (fr) * 2005-08-22 2009-09-23 Zte Corp Procédé pour transmettre un signalement de groupe dédié à l'aide d'une interface de données dans la communication de groupe
WO2012174006A1 (fr) * 2011-06-14 2012-12-20 Interdigital Patent Holdings, Inc. Maintien efficace de connectivité de communication pour une pluralité d'applications
AU2012204019B2 (en) * 2006-12-29 2014-11-06 Trading Technologies International, Inc System and method for controlled market data delivery in an electronic trading environment
US10026122B2 (en) 2006-12-29 2018-07-17 Trading Technologies International, Inc. System and method for controlled market data delivery in an electronic trading environment
US11138525B2 (en) 2012-12-10 2021-10-05 Trading Technologies International, Inc. Distribution of market data based on price level transitions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5682384A (en) * 1995-10-31 1997-10-28 Panagiotis N. Zarros Apparatus and methods achieving multiparty synchronization for real-time network application
FI972039A7 (fi) * 1997-05-13 1998-11-14 Nokia Telecommunications Oy Menetelmä pakettivälitteiseen tiedonsiirtoon
FI106512B (fi) * 1998-06-26 2001-02-15 Nokia Networks Oy Pakettikytkentäisten yhteyksien hallinta matkaviestinverkossa
JP2002523981A (ja) * 1998-08-20 2002-07-30 ノキア ネットワークス オサケ ユキチュア リアルタイム・プロトコルにおけるユーザ・マルチプレクシングを供給する方法及び装置

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1926327A4 (fr) * 2005-08-22 2009-09-23 Zte Corp Procédé pour transmettre un signalement de groupe dédié à l'aide d'une interface de données dans la communication de groupe
US10026122B2 (en) 2006-12-29 2018-07-17 Trading Technologies International, Inc. System and method for controlled market data delivery in an electronic trading environment
US10572941B2 (en) 2006-12-29 2020-02-25 Trading Technologies International, Inc. System and method for controlled market data delivery in an electronic trading environment
AU2012204019B2 (en) * 2006-12-29 2014-11-06 Trading Technologies International, Inc System and method for controlled market data delivery in an electronic trading environment
US12039603B2 (en) 2006-12-29 2024-07-16 Trading Technologies International, Inc. System and method for controlled market data delivery in an electronic trading environment
US11769205B2 (en) 2006-12-29 2023-09-26 Trading Technologies International, Inc. System and method for controlled market data delivery in an electronic trading environment
US11568487B2 (en) 2006-12-29 2023-01-31 Trading Technologies International, Inc. System and method for controlled market data delivery in an electronic trading environment
US10937095B2 (en) 2006-12-29 2021-03-02 Trading Technologies International, Inc. System and method for controlled market data delivery in an electronic trading environment
US8346254B2 (en) 2007-11-22 2013-01-01 Telefonaktiebolaget Lm Ericsson (Publ) Method for registering a mobile terminal in a mobile radio communication system
EP2220839A4 (fr) * 2007-11-22 2014-11-26 Ericsson Telefon Ab L M Procédé pour enregistrer un terminal mobile dans un système de communication radio mobile
WO2009067061A1 (fr) * 2007-11-22 2009-05-28 Telefonaktiebolaget L M Ericsson (Publ) Procédé pour enregistrer un terminal mobile dans un système de communication radio mobile
US9525742B2 (en) 2011-06-14 2016-12-20 Interdigital Patent Holdings, Inc. Method and apparatus for efficiently maintaining communications connectivity for a plurality of applications
WO2012174006A1 (fr) * 2011-06-14 2012-12-20 Interdigital Patent Holdings, Inc. Maintien efficace de connectivité de communication pour une pluralité d'applications
TWI587671B (zh) * 2011-06-14 2017-06-11 內數位專利控股公司 有效維持多個應用通訊連接的方法和裝置
US10278231B2 (en) 2011-06-14 2019-04-30 Interdigital Patent Holdings, Inc. Method and apparatus for efficiently maintaining communications connectivity for a plurality of applications
US11138525B2 (en) 2012-12-10 2021-10-05 Trading Technologies International, Inc. Distribution of market data based on price level transitions
US11636543B2 (en) 2012-12-10 2023-04-25 Trading Technologies International, Inc. Distribution of market data based on price level transitions
US11941697B2 (en) 2012-12-10 2024-03-26 Trading Technologies International, Inc. Distribution of market data based on price level transitions
US12361489B2 (en) 2012-12-10 2025-07-15 Trading Technologies International, Inc. Distribution of market data based on price level transitions

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WO2002009454A3 (fr) 2002-05-30
AU2001287652A1 (en) 2002-02-05

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