US20110151874A1 - Link report relay in access division multiplexing systems - Google Patents

Link report relay in access division multiplexing systems Download PDF

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Publication number
US20110151874A1
US20110151874A1 US12/943,770 US94377010A US2011151874A1 US 20110151874 A1 US20110151874 A1 US 20110151874A1 US 94377010 A US94377010 A US 94377010A US 2011151874 A1 US2011151874 A1 US 2011151874A1
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US
United States
Prior art keywords
radio access
wireless terminal
access technology
network
link report
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.)
Abandoned
Application number
US12/943,770
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English (en)
Inventor
Magnus Olsson
Göran Rune
Per Synnergren
Erik Westerberg
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 US12/943,770 priority Critical patent/US20110151874A1/en
Priority to PCT/IB2010/055601 priority patent/WO2011073847A2/fr
Priority to EP10805334A priority patent/EP2514230A2/fr
Priority to JP2012543945A priority patent/JP2013514702A/ja
Priority to EP10807376A priority patent/EP2514224A1/fr
Priority to CA2784099A priority patent/CA2784099A1/fr
Priority to IN5003DEN2012 priority patent/IN2012DN05003A/en
Priority to PCT/IB2010/055609 priority patent/WO2011073849A1/fr
Priority to JP2012543943A priority patent/JP2013514701A/ja
Priority to SG2012044301A priority patent/SG181739A1/en
Priority to PCT/IB2010/055778 priority patent/WO2011073884A1/fr
Priority to SG2012043071A priority patent/SG181650A1/en
Priority to EP10809072.1A priority patent/EP2514242B1/fr
Priority to EP10810882.0A priority patent/EP2514231B1/fr
Priority to PCT/IB2010/055820 priority patent/WO2011073913A1/fr
Priority to EP10810975A priority patent/EP2514232A1/fr
Priority to SG2012043097A priority patent/SG181651A1/en
Priority to PCT/IB2010/055816 priority patent/WO2011073910A1/fr
Priority to JP2012543972A priority patent/JP2013514705A/ja
Priority to JP2012543973A priority patent/JP5622863B2/ja
Priority to SG2012044319A priority patent/SG181740A1/en
Priority to IN5907DEN2012 priority patent/IN2012DN05907A/en
Priority to SG2012044327A priority patent/SG181741A1/en
Priority to JP2012543984A priority patent/JP2013514709A/ja
Priority to PCT/IB2010/055888 priority patent/WO2011073946A1/fr
Priority to EP10813022A priority patent/EP2514233A1/fr
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) reassignment TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OLSSON, MAGNUS, WESTERBERG, ERIK, RUNE, GORAN, SYNNERGREN, PER
Publication of US20110151874A1 publication Critical patent/US20110151874A1/en
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/005—Multiple registrations, e.g. multihoming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1215—Wireless traffic scheduling for collaboration of different radio technologies
    • 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
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • Provisional Patent Application 61/287,627 (attorney docket: 2380-1428) to Magnus Olsson et al., entitled “Telecommunications Multiplexing”, filed on Dec. 17, 2009.
  • U.S. Provisional Patent Application 61/287,630 (attorney docket: 2380-1429) to Magnus Olsson et al., entitled “Access Division Multiplexing—Call Setup Performance Improvement”, filed on Dec. 17, 2009.
  • U.S. Provisional Patent Application 61/287,954 (attorney docket: 2380-1433) to Magnus Olsson et al., entitled “Scheduled Optimized for GSM and LTD Multiplexing”, filed on Dec. 17, 2009.
  • This technology pertains to wireless communications networks, and particularly to the reporting and/or use of measurements for such purposes as handover.
  • wireless terminals also known as mobile stations and/or user equipment units (UEs) communicate via a radio access network (RAN) to one or more core networks.
  • the radio access network (RAN) covers a geographical area which is divided into cell areas, with each cell area being served by a base station, e.g., a radio base station (RBS), which in some networks may also be called, for example, a “NodeB” (UMTS) or “eNodeB” (LTE).
  • RBS radio base station
  • a cell is a geographical area where radio coverage is provided by the radio base station equipment at a base station site. Each cell is identified by an identity within the local radio area, which is broadcast in the cell.
  • the base stations communicate over the air interface operating on radio frequencies with the user equipment units (UE) within range of the base stations.
  • radio network controller such as a radio network controller (RNC) or a base station controller (BSC)
  • RNC radio network controller
  • BSC base station controller
  • the radio network controllers are typically connected to one or more core networks.
  • the Universal Mobile Telecommunications System is a third generation mobile communication system, which evolved from the second generation (2G) Global System for Mobile Communications (GSM).
  • UTRAN is essentially a radio access network using wideband code division multiple access for user equipment units (UEs).
  • 3GPP Third Generation Partnership Project
  • telecommunications suppliers propose and agree upon standards for third generation networks and UTRAN specifically, and investigate enhanced data rate and radio capacity.
  • Specifications for the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) are ongoing within the 3 rd Generation Partnership Project (3GPP).
  • the Evolved Universal Terrestrial Radio Access Network comprises the Long Term Evolution (LTE) and System Architecture Evolution (SAE).
  • LTE Long Term Evolution
  • SGW Serving Gateways
  • RNC radio network controller
  • RAN radio access network
  • RNC radio network controller
  • CS Cellular Circuit-Switched
  • LTE long-term evolution
  • 3GPP The long-term evolution (LTE) project within 3GPP aims to further improve the 3G standard to, among other things, provide even better mobile broadband to the end-users (higher throughput, lower round-trip-times, etc.).
  • CS fallback so that an LTE terminal falls back to 2G GSM when telephony service is used.
  • IP Internet Protocol
  • IMS Multimedia Subsystem
  • MMTel Multimedia Telephony
  • PSTN Public Switched Telephone Network
  • PLMN Public Land Mobile Network
  • UMA Unlicensed Mobile Access
  • GAN Generic Access Network
  • the IMS/MMTel approach uses a completely new core/service layer that is IMS based. This provides new possibilities to enhance the service but also comes with the drawback of a financial hurdle for the operator to overcome.
  • a new core network drives capital expenditures (CAPEX), and integration of that core network drives an initial operating expenditures (OPEX) increase.
  • the IMS/MMTel approach needs features implemented in the terminals and the legacy CS network in order to handle voice handover to/from the 2G/3G CS telephony service.
  • UMA/GAN over LTE is not a standardized solution so a drawback is that it is a proprietary solution which may make terminal availability a problem. It also adds additional functions to the core/service layer in both the network and terminal, e.g., a GAN controller in the network and GAN protocols in the UE terminal.
  • ADM Access Division Multiplexing
  • a wireless terminal simultaneously communicates with two TDMA-based radio systems, e.g., the wireless terminal can maintain communications paths to both systems by means of alternating in time its communication between the two systems. The toggling between the two systems is on a time scale small enough to effectively yield a simultaneous communication between the two systems.
  • the first system can be a GSM system and the second system can be an LTE system.
  • the communication path to the GSM system is used to maintain a radio channel for a CS voice service; the LTE radio channel is used for data services.
  • the mobile station (wireless terminal) is capable of transmission and reception of at most one radio system at any one time (single receiver and single transmitter technology).
  • the mobile station is capable of maintaining two receiving radio channels in parallel while still only capable of transmitting on one radio channel (dual receiver and single transmitter technology).
  • the dual receiver and single transmitter implementation improves the performance by simultaneous reception of data from the two systems while still using interleaving (e.g., of PCT/SE2007/000358) for its uplink transmission.
  • the dual receiver single transmitter solution has a higher cost of the mobile station since it requires double receiver radio chains of radio parts.
  • the technology disclosed herein provides mechanism(s) for transferring relevant radio-link related information from type of network to another type of network (and vice versa) by means of a wireless terminal (e.g., mobile station) acting as a mediator for the corresponding measurement messages.
  • a wireless terminal e.g., mobile station
  • the radio resource control function is placed in a first network A (e.g., a GSM network).
  • the radio resource control function could equally well be placed in a second network B (e.g., a LTE network), or any other radio network constituting one of the networks A or B described herein.
  • the technology disclosed herein concerns a method of operating a communications system.
  • the communications system comprises a first radio access technology network and a second radio access technology network.
  • the method comprises a base station node of the second radio access technology network performing a quality determination with respect to an uplink transmission from a wireless terminal.
  • the base station node of the second radio access technology network includes an indication of the quality determination with respect to the uplink transmission from the wireless terminal in a link report message transmitted to the wireless terminal.
  • the wireless terminal includes the indication of the quality determination with respect to the uplink transmission from the wireless terminal based on the indication received in the link report message in a proxy link report message and transmits the proxy link report message to a node of the first radio access technology network.
  • a control node of the first radio access technology network uses the quality determination with respect to the uplink transmission from the wireless terminal (as included in the proxy link report message) to determine whether to perform a radio access technology handover procedure.
  • the wireless terminal includes essentially the entire link report message (including the indication of the quality determination with respect to the uplink transmission from the wireless terminal) in a proxy link report message and transmits the proxy link report message to a node of the first radio access technology network.
  • the wireless terminal obtains the indication of the quality determination with respect to the uplink transmission and inserts or otherwise includes the quality determination in the proxy link report message.
  • the wireless terminal obtains the indication of the quality determination with respect to the uplink transmission and processes or operates upon (e.g., filters or averages) the indication of the quality determination and then inserts or otherwise includes (as the indication of the quality determination) a processed or derived indication of the quality determination in the proxy link report message.
  • the method further comprises the wireless terminal also providing, to the node of the first radio access technology network, an indication of a quality determination regarding a transmission between the wireless terminal and the first radio access technology network.
  • the node of the first radio access technology network also uses the indication of the signal quality between the wireless terminal and the first radio access technology network to determine whether to perform the radio access technology handover procedure.
  • the wireless terminal also includes, in the proxy link report message, the indication of the quality determination regarding a transmission between the wireless terminal and the first radio access technology network.
  • the method further comprises the wireless terminal including the indication of the quality determination regarding the transmission between the wireless terminal and the first radio access technology network in a wireless terminal separate link report message.
  • the method further comprises the wireless terminal making a determination regarding signal quality of a third radio access technology network.
  • the node of the first radio access technology network also uses the indication of the signal quality of the third radio access technology network to determine whether to perform the radio access technology handover procedure.
  • the wireless terminal includes the indication of the signal quality of the third radio access technology network in the proxy link report message.
  • the wireless terminal includes the indication of the signal quality of the third radio access technology network in a wireless terminal separate link report message.
  • the technology disclosed herein concerns a wireless terminal which serves as a multi-network measurement communicator.
  • the wireless terminal comprises a communications interface and a link report processor.
  • the communications interface is configured to enable the wireless terminal to communicate with a first radio access technology network and a second radio access technology.
  • the link report processor is configured to receive a link report message from the second radio access technology network and to prepare a proxy link report message for transmission to a node of the first radio access technology network.
  • the link report message comprises an indication of an uplink quality from the wireless terminal to the second radio access technology network.
  • the link report processor is configured to include an indication of the quality determination in the proxy link report message.
  • the communications interface is configured to perform interleaved communications with the first radio access technology network and the second radio access technology network.
  • the first radio access technology network and the second radio access technology network comprise a GSM network and a Long Term Evolution (LTE) network.
  • LTE Long Term Evolution
  • the wireless terminal further comprises a wireless terminal measurement unit.
  • the wireless terminal measurement unit is configured to perform a downlink quality measurement with respect to the first radio access technology network and a downlink quality measurement with respect to the second radio access technology network.
  • the link report processor and the communications interface are configured to transmit an indication of at least one of the downlink quality measurements to the node of the first radio access technology network.
  • the link report processor is configured to include the indication of at least one of the downlink quality measurements in the proxy link report message which is sent to the node of the first radio access technology network.
  • the link report processor is configured to include the indication of at least one of the downlink quality measurements in a wireless terminal separate link report message which is sent to the node of the first radio access technology network separately from the proxy link report message.
  • the measurement unit is further configured to make a signal quality determination for a third radio access technology network.
  • the link report processor and the communications interface are configured to transmit an indication of the signal quality of the third radio access technology network to the node of the first radio access technology network.
  • the link report processor is configured to include the indication of the signal quality of the third radio access technology network in the proxy link report message.
  • the technology disclosed herein concerns a method of operating a wireless terminal capable of communicating with a first radio access technology network and a second radio access technology.
  • the wireless terminal method comprises the wireless terminal receiving a link report message from the second radio access technology network.
  • the link report message comprises an indication of an uplink quality from the wireless terminal to the second radio access technology network.
  • the wireless terminal method further comprises the wireless terminal including an indication of the quality determination in a proxy link report message and transmitting the proxy link report message to a node of the first radio access technology network.
  • the wireless terminal method further comprises the wireless terminal performing interleaved communications with the first radio access technology network and the second radio access technology network.
  • the first radio access technology network and the second radio access technology network comprise a GSM network and a Long Term Evolution (LTE) network.
  • LTE Long Term Evolution
  • the wireless terminal method further comprises the wireless terminal making a downlink quality determination with respect to the first radio access technology network and a downlink quality determination with respect to the second radio access technology network, and the wireless terminal transmitting an indication of at least one of the downlink quality determinations to the node of the first radio access technology network.
  • the wireless terminal method further comprises the wireless terminal including the indication of the at least one of the downlink quality determinations in the proxy link report message.
  • the wireless terminal method further comprises the wireless terminal including the indication of the at least one of the downlink quality determinations in a wireless terminal separate link report message which is sent to the node of the first radio access technology network separately from the proxy link report message.
  • the wireless terminal method further comprises the wireless terminal making a determination of downlink quality with respect to a third radio access technology network and the wireless terminal transmitting an indication of the signal quality of the third radio access technology network to the node of the first radio access technology network.
  • the wireless terminal method further comprises the wireless terminal including the indication of the signal quality of the third radio access technology network in the proxy link report message.
  • the technology disclosed herein concerns a radio access network handover control node.
  • the radio access network handover control node comprises a control node link report processor and a handover unit.
  • the control node link report processor is configured to receive a link report message and a proxy link report message.
  • the handover unit is configured to use both the link report message and the proxy link report message to determine whether to perform handover from the first radio access technology network to the second radio access technology network.
  • the link report message includes an indication of a quality measurement regarding a transmission between a wireless terminal and a node of the first network.
  • the handover unit is configured to receive the proxy link report message from the wireless terminal through the first radio access technology network, the proxy link report including an indication of a quality determination regarding an uplink transmission from the wireless terminal to a node of the second radio access technology network.
  • FIG. 1 is a diagrammatic view of a system in which a wireless terminal (e.g., mobile station) is simultaneously active in a radio communication with two radio networks A and B while also being in the coverage area of a third network C.
  • a wireless terminal e.g., mobile station
  • FIG. 2 is a schematic view of a communications system comprising two radio access technology networks and a wireless terminal which serves as a multi-network measurement communicator.
  • FIG. 3 is a schematic view of a communications network comprising three radio access technology networks and a wireless terminal which serves as a multi-network measurement communicator.
  • FIG. 4A is a diagrammatic view of an example embodiment of a multi-network measurement communicating wireless terminal.
  • FIG. 4B is a diagrammatic view of another example embodiment of a multi-network measurement communicating wireless terminal, and particularly an example embodiment of a multi-network measurement communicating wireless terminal which processes or operates upon (e.g., filters or averages) an indication of the quality determination and then inserts or otherwise includes (as the indication of the quality determination) a processed or derived indication of the quality determination in the proxy link report message.
  • processes or operates upon e.g., filters or averages
  • FIG. 5 is a more detailed diagrammatic view of an example embodiment of a multi-network measurement communicating wireless terminal.
  • FIG. 6 is a yet more detailed diagrammatic view of an example embodiment of a multi-network measurement communicating wireless terminal.
  • FIG. 7 is a diagrammatic view of an example embodiment of a base station node configured to prepare a link report message for transmission to a multi-network measurement wireless terminal.
  • FIG. 8 is a more detailed diagrammatic view of an example embodiment of a base station node configured to prepare a link report message for transmission to a multi-network measurement wireless terminal.
  • FIG. 9 is a diagrammatic view of an example embodiment of a base station control node.
  • FIG. 10 is a more detailed diagrammatic view of an example embodiment of a base station control node.
  • FIG. 11 is a flowchart showing example, representative acts or steps comprising a basic method of operating a wireless terminal as a multi-network measurement communicator.
  • FIG. 11A is a flowchart showing example, representative acts or steps comprising another method of operating a wireless terminal as a multi-network measurement communicator.
  • FIG. 11B is a flowchart showing example, representative acts or steps comprising yet another method of operating a wireless terminal as a multi-network measurement communicator.
  • FIG. 12 is a flowchart showing the basic method of FIG. 11 wherein the wireless terminal is suitable for performing multiplexing or interleaving with respect to plural radio access technology networks.
  • FIG. 13 is a diagrammatic view showing the basic method of FIG. 11 as augmented by the wireless terminal making one or more downlink quality measurements and including an indication of at least one of the downlink quality measurements in a proxy link report message.
  • FIG. 14 is a diagrammatic view showing the basic method of FIG. 11 as augmented by the wireless terminal making one or more downlink quality measurements and including an indication of at least one of the downlink quality measurements in a separate link report message which precedes the proxy link report message.
  • FIG. 15 is a diagrammatic view showing the basic method of FIG. 11 as augmented by the wireless terminal making one or more downlink quality measurements and including an indication of at least one of the downlink quality measurements in a separate link report message which is subsequent to the proxy link report message.
  • FIG. 16 is a diagrammatic view showing the basic method of FIG. 13 as augmented by the wireless terminal making and reporting measurements with respect to yet another network and including the measurements with respect to the yet other network in a proxy link report message.
  • FIG. 17 is a diagrammatic view showing the basic method of FIG. 13 as augmented by the wireless terminal making and reporting measurements with respect to yet another network and including the measurements with respect to the yet other network in a separate link report message which precedes the proxy link report message.
  • FIG. 18 is a diagrammatic view showing the basic method of FIG. 13 as augmented by the wireless terminal making and reporting measurements with respect to yet another network and including the measurements with respect to the yet other network in a separate link report message which is subsequent to the proxy link report message.
  • FIG. 19 is a flowchart showing example, representative acts or steps comprising a basic method of operating a communication system which includes a multi-network measurement capability.
  • FIG. 20 is a diagrammatic view showing the basic method of FIG. 19 as augmented by the wireless terminal making one or more downlink quality measurements and including an indication of at least one of the downlink quality measurements in a proxy link report message.
  • FIG. 21 is a diagrammatic view showing the basic method of FIG. 19 as augmented by the wireless terminal making one or more downlink quality measurements and including an indication of at least one of the downlink quality measurements in a separate link report message which precedes the proxy link report message.
  • FIG. 22 is a diagrammatic view showing the basic method of FIG. 19 as augmented by the wireless terminal making and reporting measurements with respect to yet another network and including the measurements in the proxy link report message.
  • FIG. 23 is a diagrammatic view showing the basic method of FIG. 19 as augmented by the wireless terminal making and reporting measurements with respect to yet another network and including the measurements with respect to the yet other network in a separate link report message which is subsequent to the proxy link report message.
  • block diagrams herein can represent conceptual views of illustrative circuitry or other functional units embodying the principles of the technology.
  • any flow charts, state transition diagrams, pseudocode, and the like represent various processes which may be substantially represented in computer readable medium and so executed by a computer or processor, whether or not such computer or processor is explicitly shown.
  • the functional blocks may include or encompass, without limitation, digital signal processor (DSP) hardware, reduced instruction set processor, hardware (e.g., digital or analog) circuitry including but not limited to application specific integrated circuit(s) [ASIC], and (where appropriate) state machines capable of performing such functions.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • a computer is generally understood to comprise one or more processors or one or more controllers, and the terms computer and processor and controller may be employed interchangeably herein.
  • the functions may be provided by a single dedicated computer or processor or controller, by a single shared computer or processor or controller, or by a plurality of individual computers or processors or controllers, some of which may be shared or distributed.
  • processor or “controller” shall also be construed to refer to other hardware capable of performing such functions and/or executing software, such as the example hardware recited above.
  • the technology disclosed herein concerns, e.g., the problem of having a network-controlled handoff (e.g., a network-controlled handoff algorithm) in a situation where a mobile station is simultaneously connected to two different radio networks.
  • a network-controlled handoff e.g., a network-controlled handoff algorithm
  • GSM Global System for Mobile communication
  • WCDMA Wideband Code Division Multiple Access
  • cdma1x Evolution Data Optimized
  • EVDO Evolution Data Optimized
  • LTE Long Term Evolution
  • the network when the mobile station is active in its communication, the network does radio-link quality measurements on the uplink transmissions from the mobile station to the radio-base station. Similarly the mobile station does quality measurement on the downlink radio transmission.
  • the measurements in both the uplink and the downlink can contain combinations of signal strength measurements, bit-error measurements, estimated bit-error probabilities, frame erasure rates, block error rates or any other relevant indicators for the quality of the radio link.
  • the measurements in the downlink are specified, e.g., by the 3GPP Technical Specifications.
  • the mobile station also performs quality measurements on candidate non-serving radio cells in addition to the quality measurements on the active radio channels. These quality measurements typically involve measuring signal strengths only, but can also contain other measures either directly or indirectly.
  • a network radio resource control entity which performs the evaluation needs quality information (e.g., measurements) both from the network itself (relating to the uplink radio quality) and from the mobile station (relating to the downlink radio quality and the quality of radio links to neighboring cells).
  • quality information e.g., measurements
  • this is done by instructing the mobile station to send its measurements (or a representation of its measurements) to the network in a set of well defined link reports.
  • the link reports are either sent continuously as in GSM and WCDMA or conditionally relative a set of radio and traffic conditions as in LTE.
  • a resource management control unit in the network then combines the quality information in the link reports sent by the mobile station with network maintained information from the network measurements.
  • the combined information about uplink-, downlink- and neighboring cell radio-link quality is used by the network in a set of locating algorithms to determine the best cell for the mobile to be connected.
  • the locating algorithms are typically not standardized but may differ from system to system.
  • the network then uses the results from the locating algorithm to determine whether the serving cell is the preferred cell (in which case no handoff command is sent to the mobile station) or if one of the neighboring cells is preferred (in which case a handoff is prepared and an appropriate handoff command is sent to the mobile station).
  • FIG. 1 shows a communication system 20 comprising three networks 22 , e.g., network 22 A, network 22 B, and network 22 C. Although unillustrated in FIG. 1 , some networks 22 comprise base station control nodes 26 (e.g., base station controller nodes or radio network controller nodes). Each network 22 has one or more base stations 28 , such base station 28 A for network 22 A, base station 28 B for network 22 B, and base station 28 C for network 22 C.
  • base station control nodes 26 e.g., base station controller nodes or radio network controller nodes.
  • Each network 22 has one or more base stations 28 , such base station 28 A for network 22 A, base station 28 B for network 22 B, and base station 28 C for network 22 C.
  • mobile station or wireless terminal 30 is simultaneously active in a radio communication with two radio networks, e.g., network 22 A and network 22 B.
  • network 22 A can be, e.g., a GSM radio network and network 22 B can be a LTE radio network.
  • a radio resource control unit located, e.g., at base station control node 26 ) would need measurement information from the mobile station, the network 22 A, and the network 22 B.
  • wireless terminal 30 is actively communicating in a GSM network (system/network 22 A) and actively communicating in an LTE network (system/network 22 B) while also being in the coverage area of a WCDMA network (system/network 22 C).
  • the quality (e.g., measurement) information from the wireless terminal 30 is needed to evaluate the downlink performance of the radio communication with network 22 A and with network 22 B.
  • the quality information from the wireless terminal 30 is further needed by the radio resource control function to evaluate the expected radio performance should the mobile station be handed off to a neighboring cell in network 22 C.
  • the quality information from network 22 A is needed to evaluate the quality of the uplink radio communication with network 22 A and potentially also other relevant information kept by network 22 A such as load situation and network level interference levels.
  • quality information from network 22 B is needed to evaluate the quality of the uplink radio communication with network 22 B and potentially also other relevant information kept by network 22 B such as load situation and network level interference levels.
  • Any effective radio resource control function would need all the information above to be able to evaluate the total radio-link performance (communication with both system 22 A and system 22 B) and compare with the estimated performance after a potential handoff to system 22 C.
  • a problem is that with present state of the art the radio resource control function cannot have the desired quality information from wireless terminal 30 , network 22 A, and network 22 B. This is because there is no mechanism available to transfer the quality information from network 22 A to network 22 B, or vice versa. This means that if the radio resource control function is placed in network 22 A (e.g., in the GSM network), with present state of the art technology the radio resource control function would not have any information relating to uplink performance of the communication with network 22 B (e.g., the LTE network) or indeed any other relevant information kept by network 22 B such as load situation.
  • network 22 A e.g., in the GSM network
  • the radio resource control function would not have any information relating to uplink performance of the communication with network 22 B (e.g., the LTE network) or indeed any other relevant information kept by network 22 B such as load situation.
  • radio resource control function were placed in network 22 B (e.g., the LTE network), with present state of the art technology the radio resource control function would not have any information relating to uplink performance of the communication with network 22 A (e.g., GSM network) or indeed any other relevant information kept by network 22 A such as load situation.
  • network 22 B e.g., the LTE network
  • the radio resource control function would not have any information relating to uplink performance of the communication with network 22 A (e.g., GSM network) or indeed any other relevant information kept by network 22 A such as load situation.
  • the problem implies severe restrictions to the performance of the communication service in a multi-radio technology network scenario such as depicted in FIG. 1 .
  • the radio resource control unit is placed in the system 22 B (e.g., the LTE system) the radio resource control function would be unaware about the uplink GSM voice performance (GSM here being the network 22 A).
  • GSM uplink
  • the mobile station finds itself in a location with high enough uplink (UL) path loss, e.g., deep inside a building, the GSM voice call would be dropped by the GSM network without the radio resource control function even being aware of the poor quality in the GSM uplink communication. But had the radio resource control function had the relevant quality information from network 22 A, the dropped call could have been prevented by a handoff to network 22 C before the uplink radio link in network 22 A was lost.
  • UL uplink
  • the technology disclosed herein provides mechanism(s) for transferring relevant radio-link related information from one network to another network, e.g., from network 22 B to network 22 A (and vice versa) by means of a wireless terminal 30 (e.g., mobile station) acting as a mediator or relay or multi-network communicator for the corresponding quality messages.
  • a wireless terminal 30 e.g., mobile station
  • the radio resource control function is placed in network A (e.g., the GSM network).
  • network A e.g., the GSM network
  • the radio resource control function could equally well be placed in network B (e.g., the LTE network), or any other radio network constituting one of the networks A or B or any other network described herein.
  • the radio resource control function (RRCU) 34 A is implemented in the GSM base station controller (BSC) 26 A as part of network 22 A.
  • network 22 A comprises at least one GSM base station (RBS 28 A) connected to at least on base station controller (BSC) 26 A.
  • the base station controller 26 A contains or comprises radio resource control function (RRCU) 34 A and memory unit (MU 1 ) 36 A.
  • FIG. 3 Another example communications system 20 ( 3 ), shown in FIG. 3 , resembles that of FIG. 2 but further includes network 22 C.
  • the network 22 C comprises at least one radio base station (RBS) 28 C which is connected to at least one radio network controller (RNC) 26 C.
  • RNC radio network controller
  • the network 22 C is a WCDMA radio access technology network. It should be understood, however, that network 22 C is intended to be representative of a third network, and need not be a WCDMA radio access technology network but could be, for example, another GSM or LTE network, or even another of the networks mentioned above.
  • FIG. 2 At least one wireless terminal 30 moves in the coverage area of the radio base station 28 A (of network 22 A) and the radio base station 28 B (of network 22 B).
  • FIG. 3 shows the wireless terminal (UE) 30 moving in the coverage area of the radio base station 28 A (of network 22 A), the radio base station 28 B (of network 22 B), and the radio base station 28 C (of network 22 C).
  • the wireless terminal 30 comprises memory unit (MU 2 ) 38 .
  • the network 22 A performs GSM uplink radio measurements of the uplink communication link to network 22 A in the RBS 28 A according to 3GPP Technical Specifications.
  • the measurement results are transported from the RBS 28 A over the Abis interface to the BSC 26 A which stores the measurement/link report in memory unit (MU 1 ) 36 A accessible to the radio resource control unit (RRCU) 34 A.
  • MU 1 memory unit
  • RRCU radio resource control unit
  • the LTE RBS 28 B being part of network 22 B—performs quality measurement of the uplink radio radio-link communication channel from the wireless terminal 30 to the Long Term Evolution (LTE) RBS 28 B.
  • the RBS 28 B periodically writes the measurement results in a link report message (MRM 1 ) that is sent on the downlink radio channel to the wireless terminal 30 .
  • the link report can comprise processed measurement results such as the filtered signal strength or average values of the performance indications measured by the Long Term Evolution (LTE) radio base station RBS 28 B.
  • a “link report” can include any information germane to a handover decision, and thus includes but is not limited to link-related information such as measurements such as those just mentioned.
  • the wireless terminal 30 receives the link report message MRM 1 and stores the information therein in local memory unit (MU 2 ) 38 implemented in wireless terminal 30 .
  • the wireless terminal 30 uses prior art technology to measure the performance quality of the downlink communication channels relating to network 22 A and network 22 B respectively.
  • wireless terminal 30 also uses known technology to measure the signal strength and/or acquire other quality information (e.g., measurement) relating to the expected radio channel quality the wireless terminal 30 would get were it to connect to any neighboring cell belonging to the network 22 C (network 22 C being a WCDMA network in the FIG. 3 example implementation).
  • wireless terminal 30 subsequently constructs a link report message MRM 2 .
  • the wireless terminal 30 writes the information stored in the memory unit MU 2 that was received in the link report message MRM 1 previously received from the LTE RBS 28 B.
  • the wireless terminal 30 optionally further writes into the link report message MRM 2 the quality (e.g., measurement) results obtained by the mobile station on the downlink radio channels and on neighboring cells.
  • the wireless terminal 30 sends the link report message MRM 2 to the radio resource control function 34 A in network 22 A.
  • the link report message MRM 2 can be sent over the radio link to the GSM RBS 28 A which in turn forwards this message across the Abis interface to the GSM BSC 26 A where the radio resource function 34 A is implemented.
  • the BSC 26 A stores the link report in the memory unit (MU 1 ) 36 A accessible to the radio resource control unit 34 A.
  • the radio resource control unit 34 A then has essentially all necessary information available in the memory unit MU 1 36 A located in the GSM BSC 26 A.
  • the roles of the networks 22 A and 22 B are reversed so that the radio resource control unit resides in network 22 B.
  • the roles of networks 22 A and 22 B are reversed and the link report message is created in network 22 A and sent to the mobile station for further transmission to the network 22 B.
  • the information contained in the link report message MRM 1 is sent in a first message from the wireless terminal to the network 22 A while the mobile station messages are sent in a second message from the wireless terminal to network 22 A.
  • the content of either of the link report messages MRM 1 and MRM 2 comprise other sets of quality measurements, load measurements, or any other information kept by either network 22 B or the mobile station that can be of relevance to the radio resource control function in network 22 A.
  • FIG. 4A illustrates in more detail an example embodiment of a wireless terminal 30 (A) which serves as a multi-network relay/communicator.
  • the wireless terminal 30 (A) comprises communications interface 40 and link report processor 42 .
  • the communications interface 40 is configured to enable the wireless terminal 30 (A) to communicate over a radio interface with a first radio access technology network (e.g., network 22 A) and a second radio access technology (e.g., network 22 B).
  • the link report processor 42 is configured to receive a second network link report message MRM 1 from the second radio access technology network (e.g., 22 B) and to prepare a proxy link report message MRM 2 for transmission to a node of the first radio access technology network 22 A (e.g., the base station control node 26 A).
  • the link report message MRM 1 comprises an indication of an uplink quality measurement from the wireless terminal 30 to the second radio access technology network 22 B (e.g., to base station 28 B).
  • the link report processor 42 of wireless terminal 30 is configured to include an indication of the quality determination MRM 1 in the proxy link report MRM 2 for transmission to the node (e.g., base station control node 26 A) of the first radio access technology network 22 A.
  • the wireless terminal includes essentially the entire link report message (including the indication of the quality determination with respect to the uplink transmission from the wireless terminal) in the proxy link report message MRM 2 and transmits the proxy link report message MRM 2 to the node of (e.g., base station control node 26 A) the first radio access technology network.
  • the wireless terminal obtains the indication of the quality determination with respect to the uplink transmission and inserts or otherwise includes the quality determination (but not necessarily the entire link report message) in the proxy link report message MRM 2 before transmitting the proxy link report message MRM 2 to the node of the first radio access technology network.
  • the wireless terminal obtains the indication of the quality determination with respect to the uplink transmission and processes or operates upon (e.g., filters or averages) the indication of the quality determination and then inserts or otherwise includes (as the indication of the quality determination) a processed or derived indication of the quality determination in the proxy link report message.
  • the wireless terminal may obtain the indication of the quality determination with respect to the uplink transmission; then process or operates upon the information received in a link report message (e.g., the indication of the quality determination); and then include a result or output of such processed or operated-upon information in the proxy link report message as the “quality determination”.
  • the processing or operating upon the information received in a link report message may involve or include the information received in a link report message from any network, including the second radio access technology network (received in e.g., the link report message MRM 1 ) and the third radio access technology network (received in, e.g., the link report message MRM 3 ).
  • the operation or processing performed on or with respect to the information received in a link report message may be performed by the link report processor 42 of any of the preceding embodiments or other embodiments encompassed hereby.
  • such operation or processing may include filtering or averaging.
  • FIG. 4B shows a filter F which performs simple filtering such as maintaining a running average, with the filtered or averaged result being reporting as the indication of the quality determination (rather than the raw data which was actually included in the link report message and upon which the filtered or averaged result or output is based).
  • the communications interface 40 is configured to perform interleaved communications with the first radio access technology network 22 A and the second radio access technology network 22 B in accordance with techniques such as, for example, those disclosed in PCT/SE2007/000358.
  • the first radio access technology network 22 A and the second radio access technology network 22 B comprise a GSM network and a Long Term Evolution (LTE) network, respectively.
  • LTE Long Term Evolution
  • the wireless terminal 30 further comprises wireless terminal measurement unit 44 .
  • the wireless terminal measurement unit 44 is configured to perform a downlink quality measurement with respect to the first radio access technology network 22 A and a downlink quality measurement with respect to the second radio access technology network 22 B.
  • the link report processor 42 and the communications interface 40 are configured to transmit an indication of at least one of the downlink quality measurements to the node of the first radio access technology network (e.g., to base station control node 26 A of network 22 A).
  • the link report processor 42 is configured to include the indication of at least one of the downlink quality measurements in the proxy link report message MRM 2 which is sent to the node 26 A of the first radio access technology network 22 A. In another example embodiment the link report processor 42 is configured to include the indication of at least one of the downlink quality measurements in a wireless terminal separate link report message MRM 3 which is sent to the node 26 A of the first radio access technology network 22 A separately from the proxy link report message MRM 2 .
  • the measurement unit 44 is further configured to measure signal quality of a cell of a third radio access technology network 22 C.
  • the link report processor 42 and the communications interface 40 are configured to transmit an indication of the signal quality of a cell of the third radio access technology network 22 C to the node 26 A of the first radio access technology network 22 C.
  • the link report processor 42 is configured to include the indication of the signal quality of a cell of the third radio access technology network 22 C in the proxy link report message MRM 2 .
  • FIG. 5 shows yet more details of an example wireless terminal, such as wireless terminal 30 ( 5 ).
  • wireless terminal 30 ( 5 ) comprises multi-radio access technology/network scheduler 50 which schedules the interleaved or multiplexed transmissions to/from plural networks, e.g., network 22 A and network 22 B.
  • the link report processor 42 can comprise, in an example embodiment, analysis unit 52 and report preparation unit 54 .
  • the analysis unit 52 serves to analyze the link report message MRM 1 received from the base station 28 B.
  • the report preparation unit 54 serves to prepare the link report message MRM 2 (and optionally the wireless terminal separate link report message MRM 3 ) which is sent to base station control node 26 A.
  • FIG. 5 depicts, in FIG. 5 as well as other figures, a platform by which functionalities and units illustrated within line 60 can be realized in example embodiments.
  • the terminology “platform” is a way of describing how the functional units of wireless terminal 30 can be implemented or realized by machine.
  • One example platform is a computer implementation wherein one or more of the elements framed by line 60 , including link report processor 42 and wireless terminal measurement unit 44 are realized by one or more processors which execute coded instructions stored in memory (e.g., non-transitory signals) in order to perform the various acts described herein.
  • the wireless terminal 30 can comprise, in addition to a processor(s), a memory section 62 (which in turn can comprise random access memory 64 ; read only memory 66 ; application memory 68 (which stores, e.g., coded instructions which can be executed by the processor to perform acts described herein); and any other memory such as cache memory, for example).
  • a memory section 62 which in turn can comprise random access memory 64 ; read only memory 66 ; application memory 68 (which stores, e.g., coded instructions which can be executed by the processor to perform acts described herein); and any other memory such as cache memory, for example).
  • the wireless terminal 30 of each of the embodiments discussed herein can also comprise certain input/output units or functionalities, the representative input/output units for wireless terminal 30 being illustrated in FIG. 5 as keypad 70 ; audio input device (e.g. microphone) 72 ; visual input device (e.g., camera) 74 ; visual output device (e.g., display 76 ); and audio output device (e.g., speaker) 78 .
  • Other types of input/output devices can also be connected to or comprise wireless terminal 30 .
  • FIG. 5 the platform depicted by line 60 has been illustrated as computer-implemented or computer-based platform.
  • Another example platform for wireless terminal 30 can be that of a hardware circuit, e.g., an application specific integrated circuit (ASIC) wherein circuit elements are structured and operated to perform the various acts described herein.
  • ASIC application specific integrated circuit
  • FIG. 6 illustrates in more detail how wireless terminal 30 ( 6 ) can comprise first controller 80 A configured to handle administration and transmissions of network 22 A and second controller 80 B configured to handle administration and transmissions of network 22 B.
  • First controller 80 A and second controller 80 B can be realized or implemented by a same processor or controller (or processor system), and in such case may constitute separate sets of non-transitory executable signals (e.g., programs or routines stored on tangible media).
  • FIG. 6 specifically shows how various ones of the aforementioned units, such as link report processor 42 and wireless terminal measurement unit 44 , can have separate subsections thereof (e.g., link report processor 42 A and link report processor 42 B) associated with the respective networks 22 A and 22 B.
  • wireless terminal(s) can be mobile stations or user equipment units (UE) such as but not limited to mobile telephones (“cellular” telephones) and laptops with wireless capability), e.g., mobile termination), and thus can be, for example, portable, pocket, hand-held, computer-included, or car-mounted mobile devices which communicate voice and/or data with radio access network.
  • UE user equipment units
  • FIG. 7 illustrates, in simplified manner, an example embodiment of a radio base station node 28 .
  • the base station 28 of FIG. 7 is intended to be a representative base station node for any suitable radio access technology network and is configured to prepare a link report message MRM 1 for transmission to the wireless terminal 30 .
  • the radio base station node 28 comprises communications interface 100 ; base station measurement unit 104 ; and base station link report processor 106 .
  • the communications interface 100 is configured to handle uplink and downlink transmissions over a radio or air interface with respect to wireless terminal 30 .
  • the base station measurement unit 104 is configured to perform a quality measurement with respect to the uplink transmissions from wireless terminal 30 .
  • the base station link report processor 106 is configured to include an indication of the quality measurement in a downlink message (e.g., MRM 1 (e.g., link report message MRM 1 ) to wireless terminal 30 .
  • MRM 1 e.g., link report message MRM 1
  • FIG. 8 shows an example embodiment radio base station node 28 in somewhat more detail.
  • the base station 28 of FIG. 8 further comprises interface 108 (an interface to core network(s)); scheduler 110 ; and memory 112 (including application(s) memory 118 ).
  • FIG. 8 illustrates also base station measurement unit 104 as comprising analysis unit 120 and report preparation unit 122 .
  • the base station 28 comprises a platform simply depicted as broken line 124 .
  • Units and functionalities shown within platform line 124 are in this example embodiment realized by machine implementation such as by computer implementation and/or at least partially by hardware implementation (e.g., a circuit or ASIC, for example). Comments herein concerning computer and/or processor and/or controller implementation in general thus also apply to base station 28 , which can also have numerous input and output units such as those previously described for wireless terminal 30 .
  • FIG. 9 shows an example embodiment of a base station control node 26 , also known herein as a radio access network handover control node.
  • radio access network handover control node 26 comprises control node link report processor 130 and handover unit 132 .
  • the control node link report processor 130 is configured to receive a home network quality link report (from a home network to which base station control node 26 belongs) and a foreign network quality link report (concerning a foreign network to which base station control node 26 does not belong).
  • the handover unit 132 is configured to use both the home network quality link report and the foreign network quality link report to determine whether to perform a radio access technology handover to the foreign network.
  • the home network quality link report includes an indication of a quality measurement regarding a transmission between wireless terminal 30 and a node of the home network (e.g., base station node 28 A for base station control node 26 A).
  • the foreign network quality link report is included in a proxy link report message (e.g., proxy link report message MRM 2 ) received from wireless terminal 30 through the home network.
  • the foreign network quality link report comprises handover-germane information such as, for example, an indication of a quality measurement regarding an uplink transmission from wireless terminal 30 to a node of the foreign network (e.g., base station 28 B of network 22 B in FIG. 2 , for example).
  • FIG. 10 shows an example embodiment base station control node 26 in a more specific implementation.
  • base station control node 26 illustrates base station control node 26 as comprising interface 134 to home network base stations (such as base station 28 A when the base station control node is base station control node 26 A); interface 136 to a suitable core network; resource allocation and traffic handling unit 138 ; and memory 142 (including application(s) memory 148 ).
  • the base station control node 26 comprises a platform simply depicted as broken line 150 .
  • Units and functionalities shown within platform line 150 are in this example embodiment realized by machine implementation such as by computer implementation and/or at least partially by hardware implementation (e.g., a circuit or ASIC, for example). Comments herein concerning computer and/or processor and/or controller implementation in general thus also apply to base station control node 26 , which can also have numerous input and output units such as those previously described for wireless terminal 30 .
  • FIG. 11 illustrates example, representative acts or steps comprising a basic method of operating a wireless terminal (such as wireless terminal 30 of FIG. 2 ) capable of communication over a radio interface with at least a first radio access technology network (e.g., network 22 A) and a second radio access technology (e.g., network 22 B).
  • Act 11 - 1 comprises the wireless terminal receiving a link report message (e.g., link report message MRM 1 ) from the second radio access technology network.
  • the link report message MRM 1 comprises handover-germane link information as assessed by the second network, e.g., an indication of an uplink quality (e.g., an uplink quality measurement) from the wireless terminal 30 to the second radio access technology network.
  • the uplink quality measurement from the wireless terminal 30 to the second radio access technology network can be made by base station measurement unit 104 , and the link report message prepared by base station link report processor 106 (see FIG. 8 ).
  • Act 11 - 2 of the wireless terminal method further comprises the wireless terminal including the indication of an uplink quality in a proxy link report message (e.g., proxy link report message MRM 2 ) and transmitting the proxy link report message to a node of the first radio access technology network (e.g., to base station control node 26 A of network 22 A in the example embodiment of FIG. 2 ).
  • a proxy link report message e.g., proxy link report message MRM 2
  • FIG. 11A shows an example mode and embodiment similar to that of FIG. 11 , but wherein as act 11 A- 2 the wireless terminal includes essentially the entire link report message (including the indication of the quality determination with respect to the uplink transmission from the wireless terminal) in the proxy link report message MRM 2 and transmits the proxy link report message MRM 2 to the node of (e.g., base station control node 26 A) the first radio access technology network.
  • the node of e.g., base station control node 26 A
  • FIG. 11B shows another example mode and embodiment also similar to that of FIG. 11 but further described with reference to FIG. 24 .
  • the wireless terminal receives or obtains the indication of the quality determination with respect to the uplink transmission (e.g., in the link report message).
  • the wireless terminal processes or operates upon (e.g., filters or averages) the indication of the quality determination (as received in the link report message) to obtain a processed or operated-upon output or result which is also considered as an “indication of the quality determination”.
  • the wireless terminal inserts or otherwise includes (as the indication of the quality determination) a processed or derived indication of the quality determination in the proxy link report message.
  • FIG. 12 resembles FIG. 11 , but further illustrates the fact that, in an example mode and embodiment, as act 11 - 3 the wireless terminal method further comprises the wireless terminal performing interleaved or multiplexed communications with the first radio access technology network and the second radio access technology network.
  • the first radio access technology network and the second radio access technology network comprise a GSM network and a Long Term Evolution (LTE) network.
  • LTE Long Term Evolution
  • the interleaved or multiplexed communications can be in accordance with the techniques described in PCT/SE2007/000358, for example, which is incorporated herein by reference.
  • FIG. 13 illustrates that, in another example mode and embodiment, the acts of FIG. 11 can be augmented with one or more downlink quality determinations made by wireless terminal 30 .
  • Act 13 - 0 of FIG. 13 comprises the wireless terminal 30 performing a downlink quality determination (e.g., measurement) with respect to the first radio access technology network (e.g., network 22 A of FIG. 2 ) and a downlink quality determination with respect to the second radio access technology network (e.g., network 22 B of FIG. 2 ).
  • the downlink quality determinations can be made by wireless terminal measurement unit 44 .
  • the wireless terminal transmits an indication of at least one of the downlink quality determinations to the node of the first radio access technology network (e.g., to base station control node 26 A of FIG. 2 ).
  • the indication of at least one of the downlink quality determinations is included in the proxy link report message (e.g., proxy link report message MRM 2 ) which is sent to the node of the first radio access technology network.
  • the proxy link report message e.g., proxy link report message MRM 2
  • the wireless terminal includes the indication of at least one of the downlink quality determinations in a wireless terminal separate link report message (e.g., wireless terminal separate link report message MRMS) which is sent to the node of the first radio access technology network separately from the proxy link report message.
  • a wireless terminal separate link report message e.g., wireless terminal separate link report message MRMS
  • the wireless terminal separate link report message MRMS precedes the proxy link report message MRM 2
  • the wireless terminal separate link report message MRMS can (as act 15 - 2 ) succeed (follow in time) the proxy link report message MRM 2 (act 15 - 1 ).
  • FIG. 16 shows the method of FIG. 13 being augmented by the wireless terminal 30 making or obtaining determinations with respect to quality of yet another network (e.g., network 22 C of FIG. 3 ).
  • Act 16 - 0 comprises the wireless terminal making (e.g., measuring) or obtaining a determination of signal quality of a cell of a third radio access technology network 22 C (shown in FIG. 16 as being in addition to the downlink determinations for network 22 A and network 22 B).
  • the wireless terminal transmits an indication of the signal quality of a cell of the third radio access technology network to the node of the first radio access technology network (act 16 - 1 ).
  • the indication of the signal quality of a cell of the third radio access technology network is also included in the proxy link report message (e.g., proxy link report message MRM 2 ) which is sent to the node of the first radio access technology network.
  • the wireless terminal includes the indication of the signal quality of a cell of the third radio access technology network in a wireless terminal separate link report message (MRMS) which is sent to the node of the first radio access technology network separately from the proxy link report message.
  • MRMS wireless terminal separate link report message
  • the wireless terminal separate link report message of act precedes the proxy link report message MRM 2 (act 17 - 1 )
  • the wireless terminal separate link report message MRMS can (as act 18 - 2 ) succeed (follow in time) the proxy link report message MRM 2 (act 18 - 1 ).
  • FIG. 19 illustrates example, representative acts or steps comprising a basic method of operating a communication system such as communication system 20 of FIG. 2 .
  • Act 19 - 1 comprises a base station node of the second radio access technology network (e.g., base station 28 B of FIG. 2 ) performing a quality determination with respect to an uplink transmission from a wireless terminal (e.g., wireless terminal 30 ).
  • Act 19 - 2 comprises the base station node of the second radio access technology network including an indication of the quality determination in a link report message (e.g., link report message MRM 1 ) transmitted on a downlink from to the wireless terminal.
  • a link report message e.g., link report message MRM 1
  • Act 19 - 3 comprises the wireless terminal then including an indication of the quality determination in a proxy link report message (e.g., proxy link report message MRM 2 ).
  • Act 19 - 4 comprises the wireless terminal transmitting (relaying) the proxy link report message to a node of the first radio access technology network (e.g., to base station control node 26 A of network 22 A of FIG. 2 ).
  • Act 19 - 5 comprises the node of the first radio access technology network using the quality determination with respect to the uplink transmission from the wireless terminal (as included in the proxy link report message) to determine whether to perform a radio access technology handover procedure.
  • Act 19 - 4 comprises the wireless terminal also providing, as a home network quality link report to the node of the first radio access technology network, an indication of a quality determination regarding a transmission between a wireless terminal and the first radio access technology network.
  • the wireless terminal makes a determination (e.g., measurement) of a quality determination regarding a transmission between the wireless terminal and the first radio access technology network.
  • the wireless terminal also includes, in the proxy link report message, the indication of the quality determination regarding a transmission between the wireless terminal and the first radio access technology network.
  • the control node of the first radio access technology network also uses (in addition to the indications utilized in act 19 - 5 ) the indication of the signal quality between the wireless terminal and the first radio access technology network to determine whether to perform the radio access technology handover procedure.
  • the wireless terminal includes the indication of at least one of the downlink quality determinations in a wireless terminal separate link report message which is sent to the node of the first radio access technology network separately from the proxy link report message.
  • the proxy link report message can either precede or follow the separate link report message.
  • the downlink (DL) determinations performed by wireless terminal 30 can occur either before or after receipt of the second network measurement report message MRM 1 .
  • the method further comprises as act 22 - 1 the wireless terminal determining (e.g., measuring) or obtaining signal quality of a cell of a third radio access technology network 22 C (shown in FIG. 22 as being in addition to the downlink determinations for network 22 A and network 22 B).
  • the wireless terminal transmits an indication of the signal quality of the third radio access technology network (e.g., of a cell of the third radio access technology network) to the node of the first radio access technology network.
  • the node of the first radio access technology network also uses the indication of the signal quality of the third radio access technology network to determine whether to perform the radio access technology handover procedure.
  • the determination of act 22 - 3 can use other indications such as those of act 19 - 5 and act 20 - 3 .
  • the indication of the signal quality of the third radio access technology network is also included in the proxy link report message (e.g., proxy link report message MRM 2 ) which is sent to the node of the first radio access technology network.
  • the wireless terminal includes the indication of the signal quality of a cell of the third radio access technology network in a wireless terminal separate link report message which is sent to the node of the first radio access technology network separately from the proxy link report message of act 23 - 2 .
  • the wireless terminal separate link report message of act 23 - 3 succeeds the proxy link report message MRM 2 (act 23 - 2 ), but it should also be appreciated that the wireless terminal separate link report message can 23 - 3 precede (be earlier in time) the proxy link report message MRM 2 of act 23 - 2 .
  • the node of the first radio access technology network also uses the indication of the signal quality of the third radio access technology network to determine whether to perform the radio access technology handover procedure. The determination of act 23 - 4 can use other indications such as those of act 19 - 5 and act 20 - 3 .
  • An advantage of the technology disclosed herein is a better quality of the voice and data services for mobile stations moving around in a multitude of radio networks.
  • the technology disclosed herein leads to more accurate decisions for handoffs to better cells when a mobile station enters a region of poor radio quality in the service cells.
  • the technology disclosed herein will lead to inclusion of uplink quality measurements for the LTE data service in the evaluation algorithm for when to handoff from the combined GSM/LTE networks to the WCDMA network.
  • Another advantage of the technology disclosed herein is a reduction in number of dropped voice calls in a combined GSM/WCDMA/LTE system.
  • Yet another advantage is a better mobile data service in a multi-technology radio network.
  • One additional advantage of the technology disclosed herein is that it reduces the number of unnecessary handoffs between different radio technology networks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
US12/943,770 2009-12-17 2010-11-10 Link report relay in access division multiplexing systems Abandoned US20110151874A1 (en)

Priority Applications (26)

Application Number Priority Date Filing Date Title
US12/943,770 US20110151874A1 (en) 2009-12-17 2010-11-10 Link report relay in access division multiplexing systems
PCT/IB2010/055601 WO2011073847A2 (fr) 2009-12-17 2010-12-06 Relais de rapport sur une liaison dans des applications liees a des systemes d'acces de multiplexage par repartition
EP10805334A EP2514230A2 (fr) 2009-12-17 2010-12-06 Relais de rapport sur une liaison dans des applications liees a des systemes d'acces de multiplexage par repartition
JP2012543945A JP2013514702A (ja) 2009-12-17 2010-12-06 Ｗｃｄｍａにおける回線交換登録の間ｌｔｅにおけるパケット交換セッションを保持すること
EP10807376A EP2514224A1 (fr) 2009-12-17 2010-12-06 Maintien de session a commutation de paquets en lte pendant l'enregistrement d'un service de commutation de circuit dans wcdma
CA2784099A CA2784099A1 (fr) 2009-12-17 2010-12-06 Relais de rapport sur une liaison dans des applications liees a des systemes d'acces de multiplexage par repartition
IN5003DEN2012 IN2012DN05003A (fr) 2009-12-17 2010-12-06
PCT/IB2010/055609 WO2011073849A1 (fr) 2009-12-17 2010-12-06 Maintien de session a commutation de paquets en lte pendant l'enregistrement d'un service de commutation de circuit dans wcdma
JP2012543943A JP2013514701A (ja) 2009-12-17 2010-12-06 アクセス分割多重化システム関連アプリケーションにおけるリンク報告リレー
SG2012044301A SG181739A1 (en) 2009-12-17 2010-12-06 Keeping packet switched session in lte while circuit switched registered in wcdma
PCT/IB2010/055778 WO2011073884A1 (fr) 2009-12-17 2010-12-13 Maintien d'enregistrements parallèles dans des réseaux 2g/3g et lte pour l'amélioration du temps de mise en place d'un repli commuté par circuit
SG2012043071A SG181650A1 (en) 2009-12-17 2010-12-13 Maintaining parallel registrations in 2g/3g networks and lte for improving set up time of circuit switched fallback
EP10809072.1A EP2514242B1 (fr) 2009-12-17 2010-12-13 Maintien d'enregistrements parallèles dans des réseaux 2g/3g et lte pour l'amélioration du temps de mise en place d'un repli commuté par circuit
EP10810882.0A EP2514231B1 (fr) 2009-12-17 2010-12-14 Multiplexage gsm et lte après repli sur commutation de circuits
SG2012044319A SG181740A1 (en) 2009-12-17 2010-12-14 Gsm and lte multiplexing after circuit switched fallback
EP10810975A EP2514232A1 (fr) 2009-12-17 2010-12-14 Maintien de session a commutation de paquets en lte lors de l'etablissement d'un appel a commutation de circuit gsm
SG2012043097A SG181651A1 (en) 2009-12-17 2010-12-14 Maintaining packet switched session in lte when establishing gsm circuit switched call
PCT/IB2010/055816 WO2011073910A1 (fr) 2009-12-17 2010-12-14 Maintien de session a commutation de paquets en lte lors de l'etablissement d'un appel a commutation de circuit gsm
JP2012543972A JP2013514705A (ja) 2009-12-17 2010-12-14 Ｇｓｍ回線交換呼を確立する場合のｌｔｅにおけるパケット交換セッションの維持
JP2012543973A JP5622863B2 (ja) 2009-12-17 2010-12-14 回線交換フォールバック後のｇｓｍとｌｔｅの多重化
PCT/IB2010/055820 WO2011073913A1 (fr) 2009-12-17 2010-12-14 Multiplexage gsm et lte après repli sur commutation de circuits
IN5907DEN2012 IN2012DN05907A (fr) 2009-12-17 2010-12-16
SG2012044327A SG181741A1 (en) 2009-12-17 2010-12-16 Scheduling map for lte/gsm multiplexing
JP2012543984A JP2013514709A (ja) 2009-12-17 2010-12-16 Ｌｔｅ／ｇｓｍ多重化のためのスケジューリング・マップ
PCT/IB2010/055888 WO2011073946A1 (fr) 2009-12-17 2010-12-16 Carte de programmation pour multiplexage lte/gsm
EP10813022A EP2514233A1 (fr) 2009-12-17 2010-12-16 Carte de programmation pour multiplexage lte/gsm

Applications Claiming Priority (7)

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US28763009P 2009-12-17 2009-12-17
US28762309P 2009-12-17 2009-12-17
US28743809P 2009-12-17 2009-12-17
US28757509P 2009-12-17 2009-12-17
US28762709P 2009-12-17 2009-12-17
US28795409P 2009-12-18 2009-12-18
US12/943,770 US20110151874A1 (en) 2009-12-17 2010-11-10 Link report relay in access division multiplexing systems

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US12/943,770 Abandoned US20110151874A1 (en) 2009-12-17 2010-11-10 Link report relay in access division multiplexing systems
US12/943,612 Abandoned US20110149852A1 (en) 2009-12-17 2010-11-10 Keeping packet switched session in lte while circuit switched registered in wcdma
US12/943,801 Expired - Fee Related US9252936B2 (en) 2009-12-17 2010-11-10 GSM and LTE multiplexing
US12/943,504 Expired - Fee Related US8891362B2 (en) 2009-12-17 2010-11-10 Scheduling for access division multiplexing
US12/943,685 Expired - Fee Related US9246655B2 (en) 2009-12-17 2010-11-10 Maintaining packet switched session in LTE when establishing GSM circuit switched call
US12/943,736 Active 2031-04-28 US8594074B2 (en) 2009-12-17 2010-11-10 Call setup for access division multiplexing
US14/514,470 Abandoned US20150131623A1 (en) 2009-12-17 2014-10-15 Scheduling for access division multiplexing

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US12/943,612 Abandoned US20110149852A1 (en) 2009-12-17 2010-11-10 Keeping packet switched session in lte while circuit switched registered in wcdma
US12/943,801 Expired - Fee Related US9252936B2 (en) 2009-12-17 2010-11-10 GSM and LTE multiplexing
US12/943,504 Expired - Fee Related US8891362B2 (en) 2009-12-17 2010-11-10 Scheduling for access division multiplexing
US12/943,685 Expired - Fee Related US9246655B2 (en) 2009-12-17 2010-11-10 Maintaining packet switched session in LTE when establishing GSM circuit switched call
US12/943,736 Active 2031-04-28 US8594074B2 (en) 2009-12-17 2010-11-10 Call setup for access division multiplexing
US14/514,470 Abandoned US20150131623A1 (en) 2009-12-17 2014-10-15 Scheduling for access division multiplexing

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EP (6) EP2514230A2 (fr)
JP (6) JP2013514701A (fr)
CA (1) CA2784099A1 (fr)
IN (2) IN2012DN05003A (fr)
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US8891362B2 (en) 2014-11-18
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US9252936B2 (en) 2016-02-02
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