US20060146745A1 - Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service - Google Patents
Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service Download PDFInfo
- Publication number
- US20060146745A1 US20060146745A1 US11/318,976 US31897605A US2006146745A1 US 20060146745 A1 US20060146745 A1 US 20060146745A1 US 31897605 A US31897605 A US 31897605A US 2006146745 A1 US2006146745 A1 US 2006146745A1
- Authority
- US
- United States
- Prior art keywords
- node
- start time
- service
- network controller
- mbms service
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1881—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with schedule organisation, e.g. priority, sequence management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
- H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
Definitions
- the present invention relates generally to wireless packet data communication systems, and, in particular, to scheduling and synchronization of a multimedia broadcast/multicast service in a packet data communication system.
- the Universal Mobile Telecommunication Service (UMTS) standard provides a compatibility standard for cellular mobile telecommunications systems.
- the UMTS standard ensures that user equipment (UEs) operating in a UMTS system can obtain communication services when operating in a system manufactured according to the standard.
- UEs user equipment
- radio system parameters and data transfer procedures are specified by the standard, including protocols governing digital control messages and bearer traffic that are exchanged over an air interface.
- the UMTS standards provide, in 3GPP TS 25.344 (Third Generation Partnership Project Technical Specification 25.344) v0.5.0, 3GPP TS 23.246 v1.1.0, 3GPP TS 23.846 v6.1.0, 3GPP TS 25.331 v5.6.0, and 3GPP TS 25.346 v6.3.0, for a provision of a Multimedia Broadcast/Multicast Service (an MBMS service) by a UMTS communication system to UEs serviced by the system and subscribed to the service.
- the MBMS service provides for a multicast of MBMS data, typically in a format of Internet Protocol (IP) data packets, to the subscribed UEs.
- IP Internet Protocol
- the system In order to ensure that the air interface resources of the UMTS communication system are not wasted, the system first estimates the number of recipients, that is subscribed UEs, in a cell providing MBMS data. Based on the estimated number of recipients, a Radio Network Controller (RNC) included in a UMTS infrastructure determines whether to establish a Point-To-Multipoint (PTM) communication channel in the cell or a Point-To-Point (PTP) communication channel to each recipient.
- RNC Radio Network Controller
- the RNC may then multicast the MBMS data via a Forward Access Channel (FACH) of each cell, which FACH is mapped to a Secondary Common Control Physical Channel (S-CCPCH) of the cell.
- FACH Forward Access Channel
- S-CCPCH Secondary Common Control Physical Channel
- a UE receiving a same MBMS data stream via the S-CCPCH of each of the multiple Node Bs may then combine the data streams.
- significant system gain may be obtained.
- the UE in order to obtain the benefits of soft combining, the UE must be able to synchronize the MBMS data received by the UE via each Node B of the multiple Node Bs.
- FIG. 1 is a block diagram of a wireless communication system in accordance with an embodiment of the present invention.
- FIG. 2 is a logic flow diagram of an exemplary soft combining executed by the user equipment of FIG. 1 in accordance with an embodiment of the present invention.
- FIG. 3 is a logic flow diagram of a method by which the communication system of FIG. 1 provides scheduling information to the user equipment of FIG. 1 in accordance with various embodiments of the present invention.
- FIG. 4 is an exemplary timing diagram of frame flows associated with each of multiple Node Bs in accordance with an embodiment of the present invention.
- FIG. 5 is a logic flow diagram of a method executed by the communication system of FIG. 1 to determine soft combining start period times associated with each of multiple Node Bs or associated coverage areas or downlinks in accordance with an embodiment of the present invention.
- FIG. 6 is an exemplary timing diagram illustrating a detection of a soft combining start time for each of multiple Node Bs or associated coverage areas or downlinks in accordance with an embodiment of the present invention.
- FIG. 7 is an exemplary timing diagram that illustrates a method by which the network controller of FIG. 1 may synchronize multiple Node Bs in accordance with an embodiment of the present invention.
- FIG. 8 is a logic flow diagram of a method executed by the network controller of FIG. 1 to synchronize multiple Node Bs in accordance with an embodiment of the present invention.
- a communication system provides for a provision, via a single, serving Node B, of all scheduling information required by a user equipment (UE) to determine a start time for all other Node Bs of multiple Node Bs with respect to a multicast, by each Node B of the multiple Node Bs, of soft combinable MBMS data.
- the UE may then use the scheduling information to synchronize a soft combining of the MBMS data received by the UE via each of the multiple Node Bs, even when the multicasts via the multiple Node Bs are not synchronized.
- the communication system further provides for a synchronization by a network controller of the multicasts of the soft combinable MBMS data by the multiple Node Bs.
- an embodiment of the present invention encompasses a method for providing scheduling information associated with a Multimedia Broadcast/Multicast Service (MBMS service).
- the method includes setting up a multicast of the MBMS service at each Node B of a plurality of Node Bs and conveying scheduling information for each Node B of the plurality of Node Bs to a user equipment via a single Node B of the of the plurality of Node Bs.
- MBMS service Multimedia Broadcast/Multicast Service
- Another embodiment of the present invention encompasses a method for providing scheduling information associated with a Multimedia Broadcast/Multicast Service (MBMS service).
- the method includes setting up a multicast of the MBMS service at each Node B of a plurality of Node Bs, wherein the plurality of Node Bs comprise a serving Node B and a neighbor Node B, determining a start time for the neighbor Node B, determining, in association with the start time, an indicator that identifies a specific time as a start time for a multicast of the MBMS service by the neighbor Node B, conveying a Transmission Time Interval (TTI) size of a transmission that may be soft combined to a user equipment via the serving Node B, and conveying the indicator to a user equipment via the serving Node B.
- TTI Transmission Time Interval
- Still another embodiment of the present invention encompasses a method for determining a start time for a multicast of a Multimedia Broadcast/Multicast Service (MBMS service).
- the method includes receiving, via a serving Node B, an indicator that identifies a specific time as a start time for a multicast of the MBMS service by a neighbor Node B and a Transmission Time Interval (TTI) size and determining a start time and a TTI size for the neighbor Node B based on the received indicator and the TTI size.
- TTI Transmission Time Interval
- Yet another embodiment of the present invention encompasses a network controller that that provides scheduling information associated with a Multimedia Broadcast/Multicast Service (MBMS service).
- the network controller is configured to set up a multicast of the MBMS service at each Node B of a plurality of Node Bs and convey scheduling information for each Node B of the plurality of Node Bs to a user equipment via a single Node B of the of the plurality of Node Bs.
- MBMS service Multimedia Broadcast/Multicast Service
- Still another embodiment of the present invention encompasses a network controller that provides scheduling information associated with a Multimedia Broadcast/Multicast Service (MBMS service).
- the network controller is configured to set up a multicast of the MBMS service at each Node B of a plurality of Node Bs, wherein the plurality of Node Bs comprise a serving Node B and a neighbor Node B, determine a start time for the neighbor Node B, determine, in association with the start time, a start time indicator, wherein the start time indicator corresponds to the starting frame, convey a TTI size of a transmission that may be soft combined to a user equipment via the serving Node B, and convey the start time indicator to the user equipment via the serving Node B.
- MBMS service Multimedia Broadcast/Multicast Service
- Yet another embodiment of the present invention encompasses a user equipment (UE) that operates in a wireless communication system wherein a Multimedia Broadcast/Multicast Service (MBMS service) is delivered by multicast via each Node B of a plurality of Node Bs and wherein the plurality of Node Bs comprise a serving Node B and a neighbor Node B.
- UE user equipment
- MBMS service Multimedia Broadcast/Multicast Service
- the user equipment determines a start time of the multicast by the neighbor Node B and is configured to determine, in association with a potential start time of an Multimedia Broadcast/Multicast Service (MBMS) transmission by the neighbor Node B, a start time indicator, receive a start time indicator that corresponds to a start time for the neighbor Node B, and determine a start time for the neighbor Node B based on the start time indicator determined by the UE and the start time indicator received by the UE.
- MBMS Multimedia Broadcast/Multicast Service
- FIG. 1 is a block diagram of a wireless communication system 100 in accordance with an embodiment of the present invention.
- Communication system 100 includes multiple Node Bs, 120 , 123 , and 126 (three shown).
- Each Node B 120 , 123 , 126 is operably coupled to a network controller 130 , preferably a Radio Network Controller (RNC); however, in another embodiment of the present invention, one or more of Node Bs 120 , 123 , 126 may be coupled to a different network controller, wherein each such network controller is coupled to the other network controllers.
- RNC Radio Network Controller
- Node Bs 120 , 123 , and 126 When one or more of Node Bs 120 , 123 , and 126 is coupled to a different network controller than the other Node Bs, the references herein to network controller 130 may be deemed to collectively refer to all such network controllers, as the functions described herein may be distributed among such network controllers.
- Each Node B 120 , 123 , 126 provides wireless communication services to a corresponding coverage area, such as cell or a sector of a cell, via a respective air interface 110 , 113 , and 116 .
- the multiple Node Bs 120 , 123 , 126 and network controller 130 are collectively referred to herein as a Radio Access Network (RAN) 140 .
- RAN Radio Access Network
- Each air interface 110 , 113 , 116 comprises a respective downlink (DL) 112 , 115 , 118 having multiple downlink logical and transport channels, including at least one broadcast channel, at least one traffic channel, and at least one control channel, that may be mapped to one or more of multiple downlink physical channels, including at least one common control channel, at least one dedicated channel, and at least one pilot channel.
- Each air interface 110 , 113 , 116 further comprises a respective uplink (UL) 111 , 114 , 117 having multiple uplink logical and transport channels, including an access channel, at least one traffic channel, and at least one control channel, that may be mapped to one or more of multiple uplink physical channels.
- Communication system 100 further includes at least one user equipment (UE) 102 (one shown), such as but not limited to a cellular telephone, a radio telephone, a personal digital assistant (PDA) with radio frequency (RF) capabilities, or a wireless modem that provides RF access to digital terminal equipment (DTE) such as a laptop computer.
- UE 102 resides in a coverage area serviced by a serving Node B, that is, Node B 123 , of the multiple Node Bs.
- UE 102 may soft combine MBMS transmissions from one or more neighbor Node Bs in addition to serving Node B 123 , such as one or more of Node Bs 120 and 126 .
- UE 102 subscribes to, and is capable of receiving and displaying audio, video, and/or data associated with, a Multimedia Broadcast/Multicast Service (an MBMS service) provided by communication system 100 , which service provides for a distribution of MBMS data to the UE.
- a Multimedia Broadcast/Multicast Service an MBMS service
- communication system 100 which service provides for a distribution of MBMS data to the UE.
- MBMS services are described in detail in the 3GPP TS 25.344 (Third Generation Partnership Project Technical Specification 25.344) v0.5.0, 3GPP TS 23.246 v1.1.0, 3GPP TS 23.846 v6.1.0, 3GPP TS 25.331 v5.6.0, and 3GPP TS 25.346 v6.3.0, which specifications and reports are hereby incorporated by reference herein and copies of which may be obtained from the 3GPP via the Internet or from the 3GPP Organization Partners' Publications Offices at Mobile Competence Centre 650, route des Lucioles, 06921 Sophia-Antipolis Cedex, France.
- Communication system 100 further includes a Support Node 150 coupled to network controller 130 .
- Support Node 150 typically includes one or more Serving GPRS Support Nodes (SGSNs) that are each coupled to one or more Gateway GPRS Support Nodes (GGSNs).
- SGSNs Serving GPRS Support Nodes
- GGSNs Gateway GPRS Support Nodes
- the precise architecture of Support Node 150 is up to an operator of communication system 100 and is not critical to the present invention.
- communication system 100 may further include other well-known network elements, such as a Broadcast Multicast Service Center (BM-SC) or a Gateway.
- BM-SC Broadcast Multicast Service Center
- Gateway Gateway
- Communication system 100 further includes an MBMS content provider 154 , such as an IP multicast server, that is coupled to support node 150 via a data network 152 , such as an IP network.
- MBMS content provider 154 sources MBMS data, typically in the form of IP data packets, to subscribed UE 102 via support node 150 , controller 130 , serving Node B 123 , and one or more of neighboring Node Bs 120 and 126 .
- Each of UE 102 and controller 130 includes a respective processor 104 , 132 such as one or more microprocessors, microcontrollers, digital signal processors (DSPs), combinations thereof or such other devices known to those having ordinary skill in the art.
- processors 104 and 132 and respectively thus of UE 102 and controller 130 , are determined by an execution of software instructions and routines that are stored in a respective at least one memory device 106 , 134 associated with the processor, such as random access memory (RAM), dynamic random access memory (DRAM), and/or read only memory (ROM) or equivalents thereof, that store data and programs that may be executed by the corresponding processor.
- RAM random access memory
- DRAM dynamic random access memory
- ROM read only memory
- At least one memory device 106 of UE 102 further comprises a soft combining buffer 108 that stores MBMS data received from each Node B (or “soft information”) of the multiple Node Bs 120 , 123 , 126 until the data can be soft combined with a same MBMS data received from the other Node Bs of the multiple Node Bs.
- the embodiments of the present invention preferably are implemented within UE 102 and controller 130 , and more particularly with or in software programs and instructions stored in the respective at least one memory device 106 , 134 , and executed by respective processors 104 , 132 .
- the embodiments of the present invention alternatively may be implemented in hardware, for example, integrated circuits (ICs), application specific integrated circuits (ASICs), and the like, such as ASICs implemented in one or more of the wireless communication devices UE 102 and transceiver 123 .
- ICs integrated circuits
- ASICs application specific integrated circuits
- communication system 100 is a Universal Mobile Telecommunication Service (UMTS) communication system that operates in accordance with the 3GPP (Third Generation Partnership Project), or W-CDMA (Wideband Code Division Multiple Access), standards, which provide a compatibility standard for UMTS air interfaces and which standards are hereby incorporated herein in their entirety.
- the standards specify wireless telecommunications system operating protocols, including radio system parameters, call processing procedures, and provision of a broadcast-multicast service, that is, a Multimedia Broadcast/Multicast Service (MBMS), in 3GPP (Third Generation Partnership Project) TS (Technical Specification) 23.246, TS 22.146, TS 25.346, and TS 29.846, which specifications are hereby incorporated herein in their entirety.
- a communication channel comprises a logical and/or a transport channel, typically an orthogonal code, that is mapped to a physical channel, typically a frequency bandwidth.
- communication system 100 may be a Code Division Multiple Access (CDMA) 2000 communication system that operates in accordance with the 3GPP2 (Third Generation Partnership Project 2) standards.
- CDMA Code Division Multiple Access
- 3GPP2 Three Generation Partnership Project 2
- the 3GPP2 standards provide a compatibility standard for CDMA 2000 air interfaces (both 1X and DO) and specify wireless telecommunications system operating protocols, including radio system parameters, call processing procedures.
- the 3GPP2 standards further specify provision of a broadcast-multicast service, that is, a Broadcast-Multicast Service (BCMCS).
- BCMCS Broadcast-Multicast Service
- BCMCSs are described in detail in the 3GPP2 (Third Generation Partnership Project Two) X.P0022, A.S00019, C.S0054 and S.R0083 specifications, which specifications are hereby incorporated herein in their entirety and copies of which may be obtained from the 3GPP2 via the Internet or from the 3GPP2 Secretariat with administrative offices at 2500 Wilson Boulevard, Suite 300, Arlington, Va. 22201 (USA).
- 3GPP2 Three Generation Partnership Project Two
- communication system 100 may operate in accordance with any other wireless telecommunication system, such as but not limited to a Time Division Multiple Access (TDMA) communication system, a Wireless Local Area Network (WLAN) communication system as described by the IEEE (Institute of Electrical and Electronics Engineers) 802.xx standards, for example, the 802.11, 802.15, 802.16, or 802.20 standards, or an Orthogonal Frequency Division Multiple Access (OFDM) communication system.
- TDMA Time Division Multiple Access
- WLAN Wireless Local Area Network
- OFDM Orthogonal Frequency Division Multiple Access
- UE 102 subscribes to an MBMS service provided by communication system 100 .
- the MBMS service provides for a conveyance of MBMS data, via a multicast or a unicast communication session and typically in a format of Internet Protocol (IP) data packets, to each subscribed UE.
- IP Internet Protocol
- network controller 130 may determine to establish, in each coverage area, that is, at each Node B 120 , 123 , 126 , a Point-To-Multipoint (PTM) communication channel or a Point-To-Point (PTP) channel to each recipient in the coverage area.
- PTM Point-To-Multipoint
- PTP Point-To-Point
- the MBMS Active Set (or Neighbor List) comprises a cell identifier and/or one or more of a logical, transport, and/or physical channel, typically a pilot channel such as a Common Pilot Channel (CPICH), associated with serving Node B 123 and each of one or more neighbor Node Bs, such as Node Bs 120 and 126 , that are engaged in soft handoff with the UE, that is, that may be simultaneously involved in a communication session with the UE and that are potential candidates for handoff or cell reselection by the UE.
- CPICH Common Pilot Channel
- UE 102 monitors the logical, transport, and/or physical channel associated with each MBMS Active Set Node B.
- the UE may increase the transmission gain and reduce an error rate by soft combining MBMS data received via each of the two or more MBMS Active Set Node Bs.
- Logic flow 200 begins ( 202 ) when network controller 130 determines ( 204 ) to establish a Point-To-Multipoint (PTM) communication channel at each Node B of multiple Node Bs in the MBMS Active Set of UE 102 , that is, at Node Bs 120 , 123 , and 126 , for a provision of a same MBMS service by each such Node B (herein referred to as a soft combinable MBMS service and soft combinable Node Bs).
- PTM Point-To-Multipoint
- network controller 130 assigns ( 206 ) a PTM communication channel at each Node B 120 , 123 , 126 for a multicast of the data.
- the assigned communication channel comprises a multicast channel, such as a Forward Access Channel (FACH), that is mapped to a common physical channel, such as a Secondary Common Control Physical Channel (S-CCPCH).
- Network controller 130 informs ( 208 ) the subscribed UE, that is, UE 102 , of the assigned PTM communication channels and then multicasts ( 210 ) the MBMS data to the UE 102 via each of Node Bs 120 , 123 , and 126 and the PTM communication channel assigned at each Node B.
- FACH Forward Access Channel
- S-CCPCH Secondary Common Control Physical Channel
- the UE 102 When UE 102 receives ( 212 ) the MBMS data from each Node B of the multiple Node Bs 120 , 123 , 126 , the UE stores ( 214 ) the data in the UE's soft combining buffer 108 .
- the UE determines ( 216 ) that the UE has received and/or stored a same frame of MBMS data that is received via each of Node Bs 120 , 123 , 126 and respective downlinks 112 , 115 , 118 , the UE combines ( 218 ) the received and/or stored same frames and logic flow 200 ends ( 220 ).
- each of Node Bs 120 , 123 , 126 further may be provide other MBMS services to UE 102 and/or to other UEs residing in the Node B's coverage area.
- subscribed UE 102 may be subscribed to, and receiving, MBMS data with respect to other MBMS services from one or more of Node Bs 120 , 123 , and 126 .
- UE 102 In order for UE 102 to soft combine MBMS data received from each of multiple Node Bs, that is, Node Bs 120 , 123 , and 126 , with respect to a same MBMS service, UE 102 must be able to synchronize frames of data received via each Node B, so that the UE knows, when combining frames, that a same frame of data received via each of Node Bs 120 , 123 , and 126 is being combined. In order for UE 102 to synchronize the frames of data, the UE must determine a start of a soft combining period with respect to transmissions from each of the Node Bs.
- communication system 100 provides UE 102 with scheduling information that permits the UE to determine when a soft combining period starts with respect to each of the multiple Node Bs.
- a logic flow diagram 300 is provided that illustrates a method by which communication system 100 provides scheduling information to UE 102 in accordance with an embodiment of the present invention.
- Logic flow diagram 300 begins ( 302 ) when a soft combinable MBMS service is provided ( 304 ) to UE 102 via each Node B of the multiple Node Bs, that is, Node Bs 120 , 123 , and 126 .
- network controller 130 conveys a same frame of MBMS data to UE 102 via each of Node Bs 120 , 123 , and 126 .
- the UE receives each frame of MBMS data associated with the MBMS service from each of Node Bs 120 , 123 , and 126 , the UE stores the data in the UE's soft combining buffer 108 .
- network controller 130 further conveys ( 306 ) to UE 102 , and UE 102 receives ( 308 ) from the network controller, scheduling information for each of the multiple Node Bs.
- network controller 130 conveys the scheduling information via serving Node B 123 and via an MBMS control channel (MCCH) of downlink 115 of air interface 113 .
- MCCH MBMS control channel
- UE 102 may then use the provided scheduling information to determine ( 310 ) when a soft combining period starts with respect to each Node B of the multiple Node Bs 120 , 123 , 126 and to synchronize ( 312 ) the data received via each of the multiple Node Bs based on the determined starts of the soft combining periods for the multiple Node Bs.
- Logic flow 200 then ends ( 314 ).
- Network controller 130 may provide scheduling information a single time per MBMS service. However, in order to provide more scheduling flexibility, network controller 130 preferably provides the scheduling information periodically. A time period for updates of scheduling information may be pre-determined, for example, every 5 seconds, and maintained in the at least one memory devices 106 , 134 of UE 102 and network controller 130 , or network controller 130 may transmit the time period for scheduling updates to UE 102 via the MCCH of downlink 115 of air interface 113 along with radio frequency (RF) bearer characteristics. Network controller 130 may then update the scheduling of data for an MBMS service periodically and provide the updated scheduling information to UE 102 .
- RF radio frequency
- a ‘coverage area specific,’ or ‘Node B specific,’ embodiment, a transmission delay (or ‘offset’) between neighboring coverage areas, or Node Bs, is constant regardless of the MBMS service provided.
- the scheduling information conveyed by network controller 130 to UE 102 need not include a separate offset for each MBMS service. Instead, the scheduling information conveyed by network controller 130 to UE 102 may include a transmission delay for each neighbor Node B 120 , 126 (neighbor Node B offsets) and service scheduling information for each MBMS service.
- the service scheduling information for each MBMS service preferably includes a reference start time for the MBMS service (preferably a start time associated with a provision of the service at serving Node B 123 ), preferably in units of radio frames such as a starting Cell System Frame Number (SFN) index, which varies from 0 to 4095, or a starting Connection Frame Number (CFN) index, and a scheduling duration for the service, that is, a duration of a time period during which the provided scheduling information is applicable, for example, in units of radio frames or Transmission Time Intervals (TTIs).
- SFN Cell System Frame Number
- CFN Connection Frame Number
- the transmission delay provided for each neighbor Node B corresponds to a delay in a provision of an MBMS service between a reference start time, such as the start time of the MBMS service at serving Node B 123 , and the provision of the same service by the neighbor Node B.
- the transmission delay provided for each neighbor Node B comprises a delay between the start time of the MBMS service in the provided service scheduling information and a start time of the same service at the neighbor Node B.
- transmission delay between neighboring coverage areas, or Node Bs is constant, that is, is approximately the same regardless of the MBMS service provided, only a single delay need be provided for each neighbor Node B 120 , 126 and only a single start time need be provided for each MBMS service.
- the scheduling period length or duration that is, the total frames over which the scheduling information may be applicable, for each of the multiple Node Bs or coverage areas, preferably is the same. Otherwise, the delay cannot be easily controlled. That is, for soft combinable MBMS services to share a same physical channel, they must have a same scheduling period length. Therefore, preferably each soft combinable Node B 120 , 123 , 126 uses a same scheduling duration, and only a single scheduling duration need be provided for each MBMS service.
- the transmission delays between Node Bs remain approximately constant during each scheduling period or modification period.
- Serving Node B 123 then may broadcast a new delay or offset information for each of the neighbor Node Bs 120 , 126 each scheduling or modification period, along with new service scheduling information.
- UE 102 is able to determine when to detect each MBMS service provided by each Node B 120 , 123 , 126 in each corresponding coverage area. By determining when to detect each MBMS service provided by each Node B 120 , UE 102 is able to synchronize transmissions of the same information received for a same MBMS service via each of the Node Bs and to soft combine the transmissions.
- network controller 130 may provide service scheduling information that is specific to each soft combinable MBMS service and Node B. That is, in the ‘service specific’ embodiment, network controller 130 conveys to UE 102 , via serving Node B 123 , and preferably via the MCCH of downlink 115 , and for each scheduling period or modification period, service scheduling information that includes a specific start time for each soft combinable MBMS service at each Node B 120 , 123 , 126 .
- each soft combinable Node B 120 , 123 , 126 uses a same scheduling duration.
- the service scheduling information may further include a specific scheduling duration for each MBMS service at each Node B 120 , 123 , 126 or may include only a single scheduling duration for each MBMS service.
- the transmission delays between each of the multiple Node Bs 120 , 123 , 126 may differ depending upon which MBMS service of multiple MBMS services is provided by all of the Node Bs. That is, a transmission delay, or offset, between start times, that is, starting radio frame numbers such as SFNs, associated with a first Node B and a second Node B in providing a first MBMS service may be different than a delay or offset between start times associated with the first Node B and the second Node B in providing a second MBMS service.
- the delays can vary depending upon the MBMS service being provided, the delays between the start times associated with each of the MBMS services should be constrained based on the UE's soft combining buffer size.
- the transmission delay or offset associated with each MBMS service preferably is small enough to allow UE 102 to soft combine the same MBMS data received from each of Node Bs 120 , 123 , 126 with a limited soft combining buffer 108 size.
- a given transport block of MBMS data is transmitted on each of downlinks 112 , 115 , 118 within a time period such that the soft combining buffer 108 of UE 102 may store and combine the received blocks of MBMS data.
- each Node B or different coverage area may multicast their different MBMS services on a same S-CCPCH using different parameters, including different relative delays between the services. Such delays need not be constrained as there is no limiting size of a soft combining buffer.
- FIG. 4 an exemplary timing diagram 400 of frame flows for each of multiple Node Bs is provided in FIG. 4 , which diagram is based on a ‘service specific’ scheduling of frames for a first Node B, such as Node B 123 , and a second Node B, such as Node B 126 .
- some MBMS services provided by each of the first Node B, that is, Node B 123 , and the second Node B, that is, Node B 126 are soft combined by a receiving UE, that is, UE 102 .
- each of Node B 123 and Node B 126 provides MBMS services 1 and 6.
- MBMS services provided by each of Node B 123 and Node B 126 are not soft combined.
- Node B 123 provides MBMS services 2 and 3 and only Node B 126 provides MBMS services 4 and 5. Accordingly, when UE 102 subscribes to one or more of MBMS services 1 and 6, the UE soft combines the data received from each of Node B 123 and Node B 126 , whereas when UE 102 subscribes to one or more of MBMS services 2-5 then the UE will not soft combine the MBMS data.
- network controller 130 may provide to UE 102 the following scheduling information in association with Node B 123 , preferably via a serving Node B (also, in this example, Node B 123 ):
- MBMS service 1 a starting SFN of 423, a period of 6, and a transmission time interval (TTI) of 20 milliseconds (ms);
- MBMS service 2 a starting SFN of 425, a period of 6, and a TTI of 20 ms;
- MBMS service 3 a starting SFN of 426, a period of 6, and a TTI of 20 ms;
- MBMS service 6 a starting SFN of 428, a period of 6, and a TTI of 20 ms.
- network controller 130 may provide to UE 102 the following scheduling information in association with Node B 126 , again preferably via serving Node B 123 :
- MBMS service 1 a starting SFN of 451, a period of 6, and a TTI of 20 ms;
- MBMS service 4 a starting SFN of 453, a period of 6, and a TTI of 20 ms;
- MBMS service 5 a starting SFN of 454, a period of 6, and a TTI of 20 ms;
- MBMS service 6 a starting SFN of 455, a period of 6, and a TTI of 20 ms.
- MBMS services 2-5 are not to be soft combined, services 2-5 may or may not be scheduled and may or may not be conveyed to the UE, as that is up to the designer of communication system 100 .
- the MBMS services that are not to be soft combined cannot occupy the same TTIs as services that are to be soft combined, so a scheduling of MBMS services that are not to be soft combined may be somewhat constrained in that sense.
- the UE can identify the different MBMS services and therefore is able to decide what to soft combine without reading a Transport Format Combination Indicator (TFCI) associated with each MBMS service and each downlink 112 , 115 , 118 .
- TFCI Transport Format Combination Indicator
- a transport format used for a provision of the same MBMS data via each of the multiple soft combinable Node Bs 120 , 123 , 126 and corresponding downlinks 112 , 115 , 118 preferably is the same for all of the Node Bs/downlinks in order for the data to be soft combined.
- additional robustness is attained with respect to TFCI detection, essentially providing selection combining gain for the TFCI bits.
- UE 102 may soft combine the TFCI bits for further gains.
- TFCS transport format combination sets
- An advantage of the ‘service specific’ embodiment over the ‘coverage area specific’ embodiment is that communication system 100 may save communication resources, more specifically, code resources, by allowing different Node Bs 120 , 123 , 126 to provide different services in the same time slots when the services are multiplexed on the same physical channel.
- a drawback of the ‘service specific’ embodiment is that it consumes more system overhead than the ‘coverage area specific’ embodiment when conveying to UE 102 the scheduling information for all of the multiple soft combinable Node Bs 120 , 123 , 126 .
- the overhead consumed by the scheduling information signaling involved in the ‘service specific’ embodiment is not large, perhaps only a couple of hundred bits per second.
- M is an average number of services to be scheduled per modification period
- ⁇ i is a number of bits for start SFN representation, SFN from 0 to 4095, 12 bits;
- ⁇ i is a number of bits for scheduled duration representation (in radio frames or TTI) and depends on the maximum supported data rate, the scheduling period, TTI length, and spreading factor. Six (6) bits for 1 second scheduling period, 20 ms TTI may suffice;
- N is a number of coverage areas or Node Bs, whose multicasts are being soft combined (for MBMS, 10 is a reasonable value);
- ⁇ i,j is a number of bits needed to signal a time difference (in radio frames) between a serving coverage area, or node B, and a neighbor coverage area, or Node B, j for an MBMS service i. Assuming no more than a 1.28 second delay, 7 bits may suffice;
- This overhead may be further reduced by limiting a maximum delay between air interfaces of the various coverage areas, or Node Bs, or by expressing ⁇ i,j in TTIs instead of radio frames.
- UE 102 may determine a soft combining start time for each neighbor Node B 120 , 126 , or associated coverage area, merely based on a soft combining start time of only a single Node B or coverage area, preferably serving Node B 123 or the associated coverage area.
- MBMS specifications are being developed that require that RAN 140 set the maximum timing difference (as received by the UE) for different downlinks to one (1) TTI plus one (1) slot.
- UE 102 may use a start of a soft combining period for the single Node B, such as serving Node B 123 (or associated coverage area or downlink 115 ), along with the maximum timing difference to determine start times for the soft combining periods of the other soft combinable Node Bs, that is, neighbor Node Bs Node Bs 120 and 126 , or associated coverage areas or downlinks 112 , 118 .
- a logic flow diagram 500 is provided of a method executed by UE 102 to determine soft combining start period times for soft combinable neighbor Node Bs, such as Node Bs 120 or 126 (or associated coverage areas or downlinks 112 , 118 ), in accordance with the yet another embodiment of the present invention.
- Logic flow diagram 500 begins ( 502 ) when RAN 104 , and more particularly network controller 130 , sets up ( 504 ) a multicast of an MBMS service at each of Node Bs 120 , 123 , and 126 and UE 102 receives ( 506 ), from network controller 130 via serving Node B 123 , scheduling information for provision of the MBMS service by the serving Node B.
- the scheduling information includes a start time for the service, in radio frames, such as an SFN index or a CFN index, and a scheduling duration, such as a number of radio frames or TTIs, for serving Node B 123 .
- RAN 140 As part of the MBMS service, RAN 140 , and preferably network controller 130 , conveys ( 508 ) frames of MBMS data associated with the MBMS service to each of Node Bs 120 , 123 , and 126 , and via the Node Bs, to UE 102 .
- UE 102 receives ( 510 ) the frames of MBMS data, the UE stores the received frames in buffer 108 of the UE.
- RAN 140 determines ( 514 ), for each neighbor Node B 120 , 126 , a start time indicator, preferably a neighbor cell start indication (NCSI) for the Node B (and hereinafter referred to as an NCSI), that is directly associated with and identifies a start time, or a starting frame, for the multicast of the MBMS service by that Node B.
- NCSI neighbor cell start indication
- the NCSIs need only differentiate among the potential start times, or frames of MBMS data, that fall within a ‘combining window’ around the start time on the serving cell. There are a finite number of potential start times within a combining window because the UE must know when a new block of data will be transmitted.
- the W-CDMA standard indicates the time period over which a block of data will be transmitted (which is called a transmission time interval or “TTI”), and only allows each block of data on a given transport channel to begin on a radio frame that is an even multiple of the number of radio frames in a TTI.
- TTI transmission time interval
- the ‘combining window’ is window of time, or frames, that is, at the largest, plus/minus one (1) TTI plus one slot from the start time of the MBMS service as provided in the scheduling information by serving Node B 123 .
- TTI time
- the ‘combining window’ is window of time, or frames, that is, at the largest, plus/minus one (1) TTI plus one slot from the start time of the MBMS service as provided in the scheduling information by serving Node B 123 .
- at most three (3) potential start times for a neighbor Node B 120 , 126 may fall within the ‘combining window.’
- two bits may be used to represent the NCSI.
- Network controller 130 then conveys ( 516 ) to UE 102 via serving Node B 123 , and the UE receives ( 518 ) from the network controller, the NCSI determined for each neighbor Node B 120 , 126 .
- the UE determines ( 520 ) one or more potential start times, in radio frames, for each soft combinable neighbor Node B 120 , 126 (or associated coverage areas or downlink) and in association with the frames received from the Node B to produce one or more potential start times for each neighbor Node B 120 , 126 .
- Each potential start time for a neighbor Node B is associated with a frame of MBMS data conveyed by the Node B.
- RAN 140 Due to transmission delays between the serving Node B, that is, Node B 123 , and each of the neighbor Node Bs, that is, Node Bs 120 and 126 , RAN 140 is likely to determine multiple potential start times for each neighbor Node B. However, by restricting a determination of potential start time for a neighbor Node B 120 , 126 to potential start times that lie in a ‘combining window’ that is, at the largest, plus/minus one (1) TTI from the start time provided by serving Node B 123 , a minimal number, that is, at most three (3), potential start times may be determined for each neighbor Node B 120 , 126 .
- UE 102 further determines ( 522 ), in association with each of the at least one potential start times determined for each neighbor Node B 120 , 123 , an NCSI to produce at least one NCSI for each Node B.
- UE 102 determines ( 524 ) a soft combining start time by matching one of one or more NCSIs determined by UE 102 in association with each of the one or more potential start times/frames for the Node B and the NCSI for the Node B received from RAN 140 .
- Logic flow 500 then ends ( 526 ).
- FIG. 6 illustrates a detection of a soft combining start time by a UE, such as UE 102 , for each of neighbor Node Bs 120 and 126 (or associated coverage areas or downlinks 112 , 118 ) in accordance with the method described in logic flow diagram 500 .
- a Max_TTI_Size 8.
- thick lines indicate potential soft combining start times
- thinner lines indicate a start of a frame
- the arrows indicate the soft combining start times for each Node B 120 , 123 , and 126 .
- FIG. 6 illustrates a detection of a soft combining start time by a UE, such as UE 102 , for each of neighbor Node Bs 120 and 126 (or associated coverage areas or downlinks 112 , 118 ) in accordance with the method described in logic flow diagram 500 .
- a Max_TTI_Size 8.
- thick lines indicate potential soft combining start times
- thinner lines indicate a start of a frame
- the potential soft combining start times, or starting frames, as well as non-potential starting frames are designated as M(N), wherein M corresponds to the radio frame number, preferably the CFN, of the frame, and N is the NCSI calculated for the frame.
- the start of the soft combining period is CFN 32.
- UE 102 knows neighbor Node Bs 120 and 126 , that is downlinks 112 and 118 , can be soft combined, and can calculate potential soft combining start time for each neighbor Node B or coverage area. Since the network must synchronize soft combinable transmissions to one TTI, UE 102 calculates potential start times within a ‘combining window’ that is up to 1 TTI earlier and 1 TTI later than the current serving Node B or coverage area.
- potential start times, or frames, 112 and 120 both fall in the combining window.
- UE 102 calculates an NCSI for each potential start time/frame, with the result that potential start time/frame 112 is associated with an NCSI with a value of ‘2’ and potential start time/frame 120 is associated with an NCSI with a value of ‘3.’
- potential start times/frames for Node B 120 are therefore depicted in FIG. 6 as 112 ( 2 ) and 120 ( 3 ).
- one potential start time, or frame that is, start time/frame 224 , exactly matches the start time/frame of serving Node B 123 and as a result, three potential start times, or frames, 216 , 224 , 232 all fall in the combining window for Node B 123 .
- UE 102 calculates an NCSI for each potential start time/frame, with the result that potential start time/frame 216 is associated with an NCSI with a value of ‘3,’ potential start time/frame 224 is associated with an NCSI with a value of ‘0,’ and potential start time/frame 232 is associated with an NCSI with a value of ‘1.’
- These potential start times/frames for Node B 126 are therefore depicted in FIG. 6 as 216 ( 3 ), 224 ( 0 ) and 232 ( 1 ).
- network controller 130 conveys to UE 102 an NCSI for each such Node B.
- the NCSI provided by the RAN indicates which of one or more NCSIs determined by the UE for each Node B 120 , 126 corresponds to a correct start time.
- network controller 130 will convey to UE 102 an NCSI with a value of ‘2’ for Node B 120 and an NCSI with a value of ‘0’ for Node B 126 .
- UE 102 is able to determine that the start time/frame for Node B 120 is 112 and that the start time/frame for Node B 126 is 224 .
- communication system 100 provides for a provision, via a single, serving Node B, that is, Node B 123 , of all scheduling information required by a UE, that is, UE 102 , to determine a start time for all other Node Bs, that is Node Bs 120 and 123 , of multiple Node Bs, that is, Node Bs 120 , 123 , and 126 , with respect to a multicast, by each Node B of the multiple Node Bs, of soft combinable MBMS data.
- the UE By providing all needed scheduling information via a single Node B, the UE only need monitor a single link in order to obtain the scheduling information.
- the UE is permitted to sleep more and conserve battery power, as independent scheduling on the downlinks associated with each of the multiple Node Bs would cause the UE to wake up more often.
- the UE may then use the scheduling information to synchronize a soft combining of the MBMS data received by the UE via each of the multiple Node Bs, even when the multicasts via the multiple Node Bs are not synchronized.
- a ‘coverage area specific,’ or ‘Node B specific,’ embodiment, a transmission delay (or ‘offset’) between neighboring coverage areas, or Node Bs, is approximately the same regardless of the MBMS service provided.
- the scheduling information conveyed to the UE need not include a separate offset for each MBMS service.
- a network controller that is network controller 130 , may convey scheduling information the UE that includes a transmission delay for each neighbor Node B of the multiple Node Bs and service scheduling information for each MBMS service.
- the service scheduling information for each MBMS service may include a reference start time for the MBMS service and a scheduling duration for the MBMS service.
- the transmission delays between the multiple Node Bs may not be the same for all MBMS services.
- the network controller may provide service scheduling information that is specific to each soft combinable MBMS service and Node B, which service scheduling information includes a specific start time for each MBMS service at each Node B of the multiple Node Bs.
- each Node B of the multiple Node Bs uses a same scheduling duration.
- the service scheduling information may further include a specific scheduling duration for each MBMS service at each Node B of the multiple Node Bs or may include only a single scheduling duration for each MBMS service.
- the network controller may convey scheduling information relating to only a single Node B, the serving Node B, to the UE. Based on the provided scheduling information, the UE is able to determine one or more potential start times for each non-serving Node Bs of the multiple Node Bs. For each non-serving Node B, the network controller further conveys to the UE an identifier (NCSI) of which potential start time of the one or more other potential start time is the correct start time for provision of the MBMS service via that Node B. Based on the received indicators, the UE is able to determine a start time for provision of the MBMS service via each non-serving Node B.
- NCSI identifier
- the above embodiments of the present invention do not require that the multicasts of frames of data associated with an MBMS service by different Node Bs 120 , 123 , 126 be synchronized. That is, based on the scheduling information provided to UE 102 , the UE is able to determine a start time of a soft combining period for each of the downlinks 112 , 115 , 118 , and corresponding Node Bs 120 , 123 , 126 . UE 102 may then determine a frame difference, such as an SFN difference or a CFN difference, between two Node Bs whose multicasts may be soft combined and combine the transport blocks received from each Node B based on the SFN difference. Thus UE 102 may simply choose the TTIs from each of multiple downlinks 112 , 115 , and 118 and corresponding Node Bs 120 , 123 , and 126 to perform the soft combining based on the scheduling information.
- a frame difference such as an SFN difference or a
- communication system 100 further provides for a synchronizing of the multicasts of a same MBMS service by each of soft combinable Node Bs 120 , 123 , and 126 .
- network controller 130 measures and synchronizes a frame number difference, such as an SFN difference, between neighboring Node Bs, such s Node Bs 123 and 126 , in accordance with an embodiment of the present invention.
- a frame number difference such as an SFN difference
- the synchronization is implemented in accordance with a well-defined node synchronization procedures that are described in detail in 3GPP TS 25.402, which specification is hereby incorporated herein in its entirety.
- network controller 130 By synchronizing, that is, limiting a variability of transmission times, of the multicasts of an MBMS service by each of the neighboring Node Bs 120 , 123 , 126 , network controller 130 is able to assure that the transmission delays, or offsets, between the Node Bs are small enough such that soft combining the transport blocks will not exceed the buffer size of soft combining buffer 108 of UE 102 .
- FIG. 7 is an exemplary timing diagram 700 that illustrates a method by which a network controller 130 may synchronize multiple Node Bs, such as Node B 123 and Node B 126 , in accordance with an embodiment of the present invention.
- FIG. 8 is a logic flow diagram 800 of the synchronization of the multiple Node Bs by network controller 130 in accordance with an embodiment of the present invention.
- Logic flow diagram 800 begins ( 802 ) when an MBMS service is setup ( 804 ) and network controller 130 establishes ( 806 ) radio bearers, such as PTM communication channels, in each of a first coverage area that is served by a first Node B, such as Node B 123 , and a second coverage area that is served by a second Node B, such as Node B 126 .
- Radio bearers such as PTM communication channels
- network controller 130 determines ( 808 ), for each of the first Node B, that is, Node B 123 , and the second Node B, that is Node B 126 , a Node B Frame Number (BFN) associated with an arrival of a transport block at the Node B, which transport block is sent at a certain network controller 130 Frame Number (RFN).
- BFN Node B Frame Number
- RFN-BFN difference which is also determined by network controller 130 for each of the first and second Node Bs 123 , 126 .
- the RFN-BFN difference is measured using a DL Node Sync control: frame. If the control frame is sent over a transport bearer used for an MBMS service, then the RFN-BFN difference would be the same for transport blocks sent over the transport bearer.
- network controller 130 obtains the information of frame numbers at points in times T 1 - 1 , T 2 - 1 , T 3 - 1 and T 4 - 1 for Node B 123 .
- network controller 130 obtains the information of frame numbers at points in times T 1 - 2 , T 2 - 2 , T 3 - 2 and T 4 - 2 for Node B 126 .
- Each of T 1 , T 2 , T 3 are measured as a frame number (RFN or BFN) that corresponds to a time increment of 0.125 ms.
- T 1 - 1 is assumed to be 1471.125 and T 2 - 1 is assumed to be 29445.625. That is, a transport block sent by network controller 130 with an RFN 1471.125 arrives at Node B 123 at a BFN 29445.625, resulting in a time difference or frame number difference (RFN-BFN difference) of 27974.500. With respect to Node B 126 , a transport block that is sent by network controller 130 at T 1 - 2 with an RFN 1467.75 arrives at Node B 126 at T 2 - 2 at a BFN 40030.125. So the RFN-BFN difference with respect to Node B 126 is 38542.375. The RFN-BFN difference may be simplified by converting the units to units of 10 ms. The RFN-BFN difference of Node B 123 is then 2797 and the RFN-BFN difference of Node B 126 is then 3856.
- network controller 130 is able to determine ( 810 ) that the BFN difference between the first and second coverage areas, that is, between the transmissions by Node B 123 and transmissions by Node B 126 , is 1059.
- Network controller 130 may then synchronize ( 812 ) transmission of an MBMS service by each of first Node B 123 and second Node B 126 based on the determined BFN difference. For example, assume that for the first coverage area or Node B 123 , the starting SFN for the MBMS service that is being soft combined is set to X.
- Network controller 130 then may set the starting SFN for the same service in the second coverage area, that is, at Node B 126 , to X+1059.
- Logic flow 800 then ends ( 814 ).
- communication system 100 provides for a synchronization, by a UE, of received MBMS data that is multicast to the UE via each of multiple Node Bs so that the UE may soft combine the data and further provides for a synchronization by a network controller of the multicasts of the MBMS data by the multiple Node Bs.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Business, Economics & Management (AREA)
- General Business, Economics & Management (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
- This application claims priority from provisional application Ser. No. 60/641,503, entitled “METHOD AND APPARATUS FOR SCHEDULING AND SYNCHRONIZING A MULTIMEDIA BROADCAST/MULTICAST SERVICE,” filed Jan. 5, 2005, which is commonly owned and incorporated herein by reference in its entirety.
- The present invention relates generally to wireless packet data communication systems, and, in particular, to scheduling and synchronization of a multimedia broadcast/multicast service in a packet data communication system.
- The Universal Mobile Telecommunication Service (UMTS) standard provides a compatibility standard for cellular mobile telecommunications systems. The UMTS standard ensures that user equipment (UEs) operating in a UMTS system can obtain communication services when operating in a system manufactured according to the standard. To ensure compatibility, radio system parameters and data transfer procedures are specified by the standard, including protocols governing digital control messages and bearer traffic that are exchanged over an air interface.
- The UMTS standards provide, in 3GPP TS 25.344 (Third Generation Partnership Project Technical Specification 25.344) v0.5.0, 3GPP TS 23.246 v1.1.0, 3GPP TS 23.846 v6.1.0, 3GPP TS 25.331 v5.6.0, and 3GPP TS 25.346 v6.3.0, for a provision of a Multimedia Broadcast/Multicast Service (an MBMS service) by a UMTS communication system to UEs serviced by the system and subscribed to the service. The MBMS service provides for a multicast of MBMS data, typically in a format of Internet Protocol (IP) data packets, to the subscribed UEs. In order to ensure that the air interface resources of the UMTS communication system are not wasted, the system first estimates the number of recipients, that is subscribed UEs, in a cell providing MBMS data. Based on the estimated number of recipients, a Radio Network Controller (RNC) included in a UMTS infrastructure determines whether to establish a Point-To-Multipoint (PTM) communication channel in the cell or a Point-To-Point (PTP) communication channel to each recipient.
- When the RNC determines to establish a PTM communication channel in each of multiple cells, that is, at each of multiple corresponding Node Bs, the RNC may then multicast the MBMS data via a Forward Access Channel (FACH) of each cell, which FACH is mapped to a Secondary Common Control Physical Channel (S-CCPCH) of the cell. A UE receiving a same MBMS data stream via the S-CCPCH of each of the multiple Node Bs may then combine the data streams. By combining a data stream received from each of multiple Node Bs, significant system gain may be obtained. However, in order to obtain the benefits of soft combining, the UE must be able to synchronize the MBMS data received by the UE via each Node B of the multiple Node Bs.
- Therefore, a need exists for a method and apparatus that permits a UE to synchronize MBMS data received by the UE via each Node B of multiple Node Bs.
-
FIG. 1 is a block diagram of a wireless communication system in accordance with an embodiment of the present invention. -
FIG. 2 is a logic flow diagram of an exemplary soft combining executed by the user equipment ofFIG. 1 in accordance with an embodiment of the present invention. -
FIG. 3 is a logic flow diagram of a method by which the communication system ofFIG. 1 provides scheduling information to the user equipment ofFIG. 1 in accordance with various embodiments of the present invention. -
FIG. 4 is an exemplary timing diagram of frame flows associated with each of multiple Node Bs in accordance with an embodiment of the present invention. -
FIG. 5 is a logic flow diagram of a method executed by the communication system ofFIG. 1 to determine soft combining start period times associated with each of multiple Node Bs or associated coverage areas or downlinks in accordance with an embodiment of the present invention. -
FIG. 6 is an exemplary timing diagram illustrating a detection of a soft combining start time for each of multiple Node Bs or associated coverage areas or downlinks in accordance with an embodiment of the present invention. -
FIG. 7 is an exemplary timing diagram that illustrates a method by which the network controller ofFIG. 1 may synchronize multiple Node Bs in accordance with an embodiment of the present invention. -
FIG. 8 is a logic flow diagram of a method executed by the network controller ofFIG. 1 to synchronize multiple Node Bs in accordance with an embodiment of the present invention. - To address the need for a method and an apparatus that permits a UE to synchronize MBMS data received by the UE via each Node B of multiple Node Bs, a communication system provides for a provision, via a single, serving Node B, of all scheduling information required by a user equipment (UE) to determine a start time for all other Node Bs of multiple Node Bs with respect to a multicast, by each Node B of the multiple Node Bs, of soft combinable MBMS data. The UE may then use the scheduling information to synchronize a soft combining of the MBMS data received by the UE via each of the multiple Node Bs, even when the multicasts via the multiple Node Bs are not synchronized. However, while the multicasts of frames of data associated with an MBMS service by different Node Bs need not be synchronized, synchronized multicasts are preferable for soft combining. Therefore, the communication system further provides for a synchronization by a network controller of the multicasts of the soft combinable MBMS data by the multiple Node Bs.
- Generally, an embodiment of the present invention encompasses a method for providing scheduling information associated with a Multimedia Broadcast/Multicast Service (MBMS service). The method includes setting up a multicast of the MBMS service at each Node B of a plurality of Node Bs and conveying scheduling information for each Node B of the plurality of Node Bs to a user equipment via a single Node B of the of the plurality of Node Bs.
- Another embodiment of the present invention encompasses a method for providing scheduling information associated with a Multimedia Broadcast/Multicast Service (MBMS service). The method includes setting up a multicast of the MBMS service at each Node B of a plurality of Node Bs, wherein the plurality of Node Bs comprise a serving Node B and a neighbor Node B, determining a start time for the neighbor Node B, determining, in association with the start time, an indicator that identifies a specific time as a start time for a multicast of the MBMS service by the neighbor Node B, conveying a Transmission Time Interval (TTI) size of a transmission that may be soft combined to a user equipment via the serving Node B, and conveying the indicator to a user equipment via the serving Node B.
- Still another embodiment of the present invention encompasses a method for determining a start time for a multicast of a Multimedia Broadcast/Multicast Service (MBMS service). The method includes receiving, via a serving Node B, an indicator that identifies a specific time as a start time for a multicast of the MBMS service by a neighbor Node B and a Transmission Time Interval (TTI) size and determining a start time and a TTI size for the neighbor Node B based on the received indicator and the TTI size.
- Yet another embodiment of the present invention encompasses a network controller that that provides scheduling information associated with a Multimedia Broadcast/Multicast Service (MBMS service). The network controller is configured to set up a multicast of the MBMS service at each Node B of a plurality of Node Bs and convey scheduling information for each Node B of the plurality of Node Bs to a user equipment via a single Node B of the of the plurality of Node Bs.
- Still another embodiment of the present invention encompasses a network controller that provides scheduling information associated with a Multimedia Broadcast/Multicast Service (MBMS service). The network controller is configured to set up a multicast of the MBMS service at each Node B of a plurality of Node Bs, wherein the plurality of Node Bs comprise a serving Node B and a neighbor Node B, determine a start time for the neighbor Node B, determine, in association with the start time, a start time indicator, wherein the start time indicator corresponds to the starting frame, convey a TTI size of a transmission that may be soft combined to a user equipment via the serving Node B, and convey the start time indicator to the user equipment via the serving Node B.
- Yet another embodiment of the present invention encompasses a user equipment (UE) that operates in a wireless communication system wherein a Multimedia Broadcast/Multicast Service (MBMS service) is delivered by multicast via each Node B of a plurality of Node Bs and wherein the plurality of Node Bs comprise a serving Node B and a neighbor Node B. The user equipment determines a start time of the multicast by the neighbor Node B and is configured to determine, in association with a potential start time of an Multimedia Broadcast/Multicast Service (MBMS) transmission by the neighbor Node B, a start time indicator, receive a start time indicator that corresponds to a start time for the neighbor Node B, and determine a start time for the neighbor Node B based on the start time indicator determined by the UE and the start time indicator received by the UE.
- The present invention may be more fully described with reference to
FIGS. 1-8 .FIG. 1 is a block diagram of awireless communication system 100 in accordance with an embodiment of the present invention.Communication system 100 includes multiple Node Bs, 120, 123, and 126 (three shown). EachNode B network controller 130, preferably a Radio Network Controller (RNC); however, in another embodiment of the present invention, one or more ofNode Bs Node Bs network controller 130 may be deemed to collectively refer to all such network controllers, as the functions described herein may be distributed among such network controllers. EachNode B respective air interface multiple Node Bs network controller 130 are collectively referred to herein as a Radio Access Network (RAN) 140. - Each
air interface air interface -
Communication system 100 further includes at least one user equipment (UE) 102 (one shown), such as but not limited to a cellular telephone, a radio telephone, a personal digital assistant (PDA) with radio frequency (RF) capabilities, or a wireless modem that provides RF access to digital terminal equipment (DTE) such as a laptop computer. UE 102 resides in a coverage area serviced by a serving Node B, that is, Node B 123, of the multiple Node Bs. UE 102 may soft combine MBMS transmissions from one or more neighbor Node Bs in addition to serving Node B 123, such as one or more of NodeBs - UE 102 subscribes to, and is capable of receiving and displaying audio, video, and/or data associated with, a Multimedia Broadcast/Multicast Service (an MBMS service) provided by
communication system 100, which service provides for a distribution of MBMS data to the UE. MBMS services are described in detail in the 3GPP TS 25.344 (Third Generation Partnership Project Technical Specification 25.344) v0.5.0, 3GPP TS 23.246 v1.1.0, 3GPP TS 23.846 v6.1.0, 3GPP TS 25.331 v5.6.0, and 3GPP TS 25.346 v6.3.0, which specifications and reports are hereby incorporated by reference herein and copies of which may be obtained from the 3GPP via the Internet or from the 3GPP Organization Partners' Publications Offices at Mobile Competence Centre 650, route des Lucioles, 06921 Sophia-Antipolis Cedex, France. -
Communication system 100 further includes aSupport Node 150 coupled tonetwork controller 130.Support Node 150 typically includes one or more Serving GPRS Support Nodes (SGSNs) that are each coupled to one or more Gateway GPRS Support Nodes (GGSNs). However, the precise architecture of Support Node 150 is up to an operator ofcommunication system 100 and is not critical to the present invention. Although not shown,communication system 100 may further include other well-known network elements, such as a Broadcast Multicast Service Center (BM-SC) or a Gateway. -
Communication system 100 further includes an MBMScontent provider 154, such as an IP multicast server, that is coupled to supportnode 150 via adata network 152, such as an IP network. As part of an MBMS service provided bycommunication system 100 and subscribed to by UE 102, MBMScontent provider 154 sources MBMS data, typically in the form of IP data packets, to subscribed UE 102 viasupport node 150,controller 130, serving NodeB 123, and one or more of neighboringNode Bs - Each of UE 102 and
controller 130 includes arespective processor processors UE 102 andcontroller 130, are determined by an execution of software instructions and routines that are stored in a respective at least onememory device UE 102 to soft combine MBMS transmissions from multiple Node Bs, at least onememory device 106 ofUE 102 further comprises asoft combining buffer 108 that stores MBMS data received from each Node B (or “soft information”) of themultiple Node Bs - The embodiments of the present invention preferably are implemented within
UE 102 andcontroller 130, and more particularly with or in software programs and instructions stored in the respective at least onememory device respective processors communication devices UE 102 andtransceiver 123. Based on the present disclosure, one skilled in the art will be readily capable of producing and implementing such software and/or hardware without undo experimentation. - Preferably,
communication system 100 is a Universal Mobile Telecommunication Service (UMTS) communication system that operates in accordance with the 3GPP (Third Generation Partnership Project), or W-CDMA (Wideband Code Division Multiple Access), standards, which provide a compatibility standard for UMTS air interfaces and which standards are hereby incorporated herein in their entirety. The standards specify wireless telecommunications system operating protocols, including radio system parameters, call processing procedures, and provision of a broadcast-multicast service, that is, a Multimedia Broadcast/Multicast Service (MBMS), in 3GPP (Third Generation Partnership Project) TS (Technical Specification) 23.246, TS 22.146, TS 25.346, and TS 29.846, which specifications are hereby incorporated herein in their entirety. In a UMTS communication system such ascommunication system 100, a communication channel comprises a logical and/or a transport channel, typically an orthogonal code, that is mapped to a physical channel, typically a frequency bandwidth. - In another embodiment of the present invention,
communication system 100 may be a Code Division Multiple Access (CDMA) 2000 communication system that operates in accordance with the 3GPP2 (Third Generation Partnership Project 2) standards. The 3GPP2 standards provide a compatibility standard for CDMA 2000 air interfaces (both 1X and DO) and specify wireless telecommunications system operating protocols, including radio system parameters, call processing procedures. The 3GPP2 standards further specify provision of a broadcast-multicast service, that is, a Broadcast-Multicast Service (BCMCS). BCMCSs are described in detail in the 3GPP2 (Third Generation Partnership Project Two) X.P0022, A.S00019, C.S0054 and S.R0083 specifications, which specifications are hereby incorporated herein in their entirety and copies of which may be obtained from the 3GPP2 via the Internet or from the 3GPP2 Secretariat with administrative offices at 2500 Wilson Boulevard,Suite 300, Arlington, Va. 22201 (USA). In yet other embodiments of the present invention,communication system 100 may operate in accordance with any other wireless telecommunication system, such as but not limited to a Time Division Multiple Access (TDMA) communication system, a Wireless Local Area Network (WLAN) communication system as described by the IEEE (Institute of Electrical and Electronics Engineers) 802.xx standards, for example, the 802.11, 802.15, 802.16, or 802.20 standards, or an Orthogonal Frequency Division Multiple Access (OFDM) communication system. - As noted above,
UE 102 subscribes to an MBMS service provided bycommunication system 100. The MBMS service provides for a conveyance of MBMS data, via a multicast or a unicast communication session and typically in a format of Internet Protocol (IP) data packets, to each subscribed UE. As is known in the art, whencommunication system 100 has MBMS data to provide to subscribers to the MBMS service,network controller 130 may determine to establish, in each coverage area, that is, at eachNode B - When
UE 102 is soft combining MBMS transmissions from multiple Node Bs, the UE maintains, in the at least onememory device 106 of the UE, an MBMS Active Set or a Neighbor List. The MBMS Active Set (or Neighbor List) comprises a cell identifier and/or one or more of a logical, transport, and/or physical channel, typically a pilot channel such as a Common Pilot Channel (CPICH), associated with servingNode B 123 and each of one or more neighbor Node Bs, such asNode Bs UE 102 monitors the logical, transport, and/or physical channel associated with each MBMS Active Set Node B. When the UE is actively engaged in an MBMS session and receives MBMS data via two or more of the MBMS Active Set Node Bs, the UE may increase the transmission gain and reduce an error rate by soft combining MBMS data received via each of the two or more MBMS Active Set Node Bs. - Referring now to
FIG. 2 , a logic flow diagram 200 is provided that depicts an exemplary soft combining byUE 102 in accordance with an embodiment of the present invention.Logic flow 200 begins (202) whennetwork controller 130 determines (204) to establish a Point-To-Multipoint (PTM) communication channel at each Node B of multiple Node Bs in the MBMS Active Set ofUE 102, that is, atNode Bs network controller 130 assigns (206) a PTM communication channel at eachNode B Network controller 130 informs (208) the subscribed UE, that is,UE 102, of the assigned PTM communication channels and then multicasts (210) the MBMS data to theUE 102 via each ofNode Bs UE 102 receives (212) the MBMS data from each Node B of themultiple Node Bs soft combining buffer 108. When the UE determines (216) that the UE has received and/or stored a same frame of MBMS data that is received via each ofNode Bs respective downlinks logic flow 200 ends (220). - While providing a soft combinable MBMS service to
UE 102, each ofNode Bs UE 102 and/or to other UEs residing in the Node B's coverage area. In turn, subscribedUE 102 may be subscribed to, and receiving, MBMS data with respect to other MBMS services from one or more ofNode Bs UE 102 to soft combine MBMS data received from each of multiple Node Bs, that is,Node Bs UE 102 must be able to synchronize frames of data received via each Node B, so that the UE knows, when combining frames, that a same frame of data received via each ofNode Bs UE 102 to synchronize the frames of data, the UE must determine a start of a soft combining period with respect to transmissions from each of the Node Bs. - To facilitate the soft combining of data by
UE 102,communication system 100 providesUE 102 with scheduling information that permits the UE to determine when a soft combining period starts with respect to each of the multiple Node Bs. Referring now toFIG. 3 , a logic flow diagram 300 is provided that illustrates a method by whichcommunication system 100 provides scheduling information toUE 102 in accordance with an embodiment of the present invention. Logic flow diagram 300 begins (302) when a soft combinable MBMS service is provided (304) toUE 102 via each Node B of the multiple Node Bs, that is,Node Bs network controller 130 conveys a same frame of MBMS data toUE 102 via each ofNode Bs Node Bs soft combining buffer 108. - To facilitate a soft combining of the MBMS data stored by
UE 102,network controller 130 further conveys (306) toUE 102, andUE 102 receives (308) from the network controller, scheduling information for each of the multiple Node Bs. Preferably,network controller 130 conveys the scheduling information via servingNode B 123 and via an MBMS control channel (MCCH) ofdownlink 115 ofair interface 113.UE 102 may then use the provided scheduling information to determine (310) when a soft combining period starts with respect to each Node B of themultiple Node Bs Logic flow 200 then ends (314). -
Network controller 130 may provide scheduling information a single time per MBMS service. However, in order to provide more scheduling flexibility,network controller 130 preferably provides the scheduling information periodically. A time period for updates of scheduling information may be pre-determined, for example, every 5 seconds, and maintained in the at least onememory devices UE 102 andnetwork controller 130, ornetwork controller 130 may transmit the time period for scheduling updates toUE 102 via the MCCH ofdownlink 115 ofair interface 113 along with radio frequency (RF) bearer characteristics.Network controller 130 may then update the scheduling of data for an MBMS service periodically and provide the updated scheduling information toUE 102. - In one embodiment of the present invention, a ‘coverage area specific,’ or ‘Node B specific,’ embodiment, a transmission delay (or ‘offset’) between neighboring coverage areas, or Node Bs, is constant regardless of the MBMS service provided. As a result, the scheduling information conveyed by
network controller 130 toUE 102 need not include a separate offset for each MBMS service. Instead, the scheduling information conveyed bynetwork controller 130 toUE 102 may include a transmission delay for eachneighbor Node B 120, 126 (neighbor Node B offsets) and service scheduling information for each MBMS service. In turn, the service scheduling information for each MBMS service preferably includes a reference start time for the MBMS service (preferably a start time associated with a provision of the service at serving Node B 123), preferably in units of radio frames such as a starting Cell System Frame Number (SFN) index, which varies from 0 to 4095, or a starting Connection Frame Number (CFN) index, and a scheduling duration for the service, that is, a duration of a time period during which the provided scheduling information is applicable, for example, in units of radio frames or Transmission Time Intervals (TTIs). - The transmission delay provided for each neighbor Node B corresponds to a delay in a provision of an MBMS service between a reference start time, such as the start time of the MBMS service at serving
Node B 123, and the provision of the same service by the neighbor Node B. From another perspective, the transmission delay provided for each neighbor Node B comprises a delay between the start time of the MBMS service in the provided service scheduling information and a start time of the same service at the neighbor Node B. As the ‘coverage area specific’ embodiment assumes that transmission delay between neighboring coverage areas, or Node Bs, is constant, that is, is approximately the same regardless of the MBMS service provided, only a single delay need be provided for eachneighbor Node B - In addition, when a same MBMS service is available for soft combining at the
multiple Node Bs combinable Node B - The transmission delays between Node Bs remain approximately constant during each scheduling period or modification period. Serving
Node B 123 then may broadcast a new delay or offset information for each of theneighbor Node Bs UE 102 is able to determine when to detect each MBMS service provided by eachNode B Node B 120,UE 102 is able to synchronize transmissions of the same information received for a same MBMS service via each of the Node Bs and to soft combine the transmissions. - In another embodiment of the present invention, a ‘service specific’ embodiment, the transmission delays between Node Bs may not be the same for all soft combinable MBMS services. As a result, instead of providing a delay for each neighbor Node B and a single start time and schedule duration for each MBMS service,
network controller 130 may provide service scheduling information that is specific to each soft combinable MBMS service and Node B. That is, in the ‘service specific’ embodiment,network controller 130 conveys toUE 102, via servingNode B 123, and preferably via the MCCH ofdownlink 115, and for each scheduling period or modification period, service scheduling information that includes a specific start time for each soft combinable MBMS service at eachNode B combinable Node B Node B - In the ‘service specific’ embodiment, the transmission delays between each of the
multiple Node Bs UE 102 to soft combine the same MBMS data received from each ofNode Bs soft combining buffer 108 size. By constraining a maximum size of the transmission delays or offsets, a given transport block of MBMS data is transmitted on each ofdownlinks soft combining buffer 108 ofUE 102 may store and combine the received blocks of MBMS data. - For non-soft combinable MBMS services, that is, for services that
UE 102 receives via only a single Node B or coverage area of themultiple Node Bs - To assist in understanding the principles of the ‘service specific’ embodiment while not intending to limit the invention in any way, an exemplary timing diagram 400 of frame flows for each of multiple Node Bs is provided in
FIG. 4 , which diagram is based on a ‘service specific’ scheduling of frames for a first Node B, such asNode B 123, and a second Node B, such asNode B 126. InFIG. 4 , some MBMS services provided by each of the first Node B, that is,Node B 123, and the second Node B, that is,Node B 126, are soft combined by a receiving UE, that is,UE 102. For example, each ofNode B 123 andNode B 126 providesMBMS services Node B 123 andNode B 126 are not soft combined. For example, onlyNode B 123 providesMBMS services only Node B 126 providesMBMS services UE 102 subscribes to one or more ofMBMS services Node B 123 andNode B 126, whereas whenUE 102 subscribes to one or more of MBMS services 2-5 then the UE will not soft combine the MBMS data. - Furthermore, as depicted in
FIG. 4 , the transmission delays (or offsets) betweenNode B 123 andNode B 126 is not the same for all MBMS services. That is, while bothNode B services Node B 123 deliversMBMS service 1 earlier thanNode B 126 whileNode B 126 deliversMBMS service 6 earlier thanNode B 123. Therefore, in accordance with the ‘service specific’ embodiment of the present invention,network controller 130 may provide toUE 102 the following scheduling information in association withNode B 123, preferably via a serving Node B (also, in this example, Node B 123): -
MBMS service 1—a starting SFN of 423, a period of 6, and a transmission time interval (TTI) of 20 milliseconds (ms); -
MBMS service 2—a starting SFN of 425, a period of 6, and a TTI of 20 ms; -
MBMS service 3—a starting SFN of 426, a period of 6, and a TTI of 20 ms; and -
MBMS service 6—a starting SFN of 428, a period of 6, and a TTI of 20 ms. - In addition,
network controller 130 may provide toUE 102 the following scheduling information in association withNode B 126, again preferably via serving Node B 123: -
MBMS service 1—a starting SFN of 451, a period of 6, and a TTI of 20 ms; -
MBMS service 4—a starting SFN of 453, a period of 6, and a TTI of 20 ms; -
MBMS service 5—a starting SFN of 454, a period of 6, and a TTI of 20 ms; and -
MBMS service 6—a starting SFN of 455, a period of 6, and a TTI of 20 ms. - Since MBMS services 2-5 are not to be soft combined, services 2-5 may or may not be scheduled and may or may not be conveyed to the UE, as that is up to the designer of
communication system 100. However, the MBMS services that are not to be soft combined cannot occupy the same TTIs as services that are to be soft combined, so a scheduling of MBMS services that are not to be soft combined may be somewhat constrained in that sense. - In both the ‘coverage area specific’ embodiment and the ‘service specific’ embodiments of the present invention, based on the scheduling information provided to
UE 102, the UE can identify the different MBMS services and therefore is able to decide what to soft combine without reading a Transport Format Combination Indicator (TFCI) associated with each MBMS service and eachdownlink UE 102, a transport format used for a provision of the same MBMS data via each of the multiple softcombinable Node Bs corresponding downlinks UE 102 may soft combine the TFCI bits for further gains. However, different downlinks may have different transport format combination sets (TFCS), so it may be difficult to select an identical TFCI and a same transport format combination for all downlinks being soft combined. Therefore, in another embodiment of the present invention,UE 102 may not assume that all downlinks have an identical TFCI and, as a result, may not soft combine the TFCI bits. - An advantage of the ‘service specific’ embodiment over the ‘coverage area specific’ embodiment is that
communication system 100 may save communication resources, more specifically, code resources, by allowingdifferent Node Bs UE 102 the scheduling information for all of the multiple softcombinable Node Bs
wherein, - M is an average number of services to be scheduled per modification period;
- αi is a number of bits for start SFN representation, SFN from 0 to 4095, 12 bits;
- βi is a number of bits for scheduled duration representation (in radio frames or TTI) and depends on the maximum supported data rate, the scheduling period, TTI length, and spreading factor. Six (6) bits for 1 second scheduling period, 20 ms TTI may suffice;
- N is a number of coverage areas or Node Bs, whose multicasts are being soft combined (for MBMS, 10 is a reasonable value);
- δi,j is a number of bits needed to signal a time difference (in radio frames) between a serving coverage area, or node B, and a neighbor coverage area, or Node B, j for an MBMS service i. Assuming no more than a 1.28 second delay, 7 bits may suffice;
- f is an inverse of scheduling period. A reasonable assumption is that the scheduling period is the same as the modification period (around 5 s), so a nominal f=0.2.
- For example, assuming that N=10, M=10, f=5 s, δi,j=7, then the overhead is 10*(6+12+10*7)/5=176 bits/second. This overhead may be further reduced by limiting a maximum delay between air interfaces of the various coverage areas, or Node Bs, or by expressing δi,j in TTIs instead of radio frames.
- In yet another embodiment of the present invention,
UE 102 may determine a soft combining start time for eachneighbor Node B Node B 123 or the associated coverage area. MBMS specifications are being developed that require thatRAN 140 set the maximum timing difference (as received by the UE) for different downlinks to one (1) TTI plus one (1) slot. As a result,UE 102 may use a start of a soft combining period for the single Node B, such as serving Node B 123 (or associated coverage area or downlink 115), along with the maximum timing difference to determine start times for the soft combining periods of the other soft combinable Node Bs, that is, neighbor NodeBs Node Bs - Referring now to
FIG. 5 , a logic flow diagram 500 is provided of a method executed byUE 102 to determine soft combining start period times for soft combinable neighbor Node Bs, such asNode Bs 120 or 126 (or associated coverage areas or downlinks 112, 118), in accordance with the yet another embodiment of the present invention. Logic flow diagram 500 begins (502) whenRAN 104, and more particularlynetwork controller 130, sets up (504) a multicast of an MBMS service at each ofNode Bs UE 102 receives (506), fromnetwork controller 130 via servingNode B 123, scheduling information for provision of the MBMS service by the serving Node B. The scheduling information includes a start time for the service, in radio frames, such as an SFN index or a CFN index, and a scheduling duration, such as a number of radio frames or TTIs, for servingNode B 123. - As part of the MBMS service,
RAN 140, and preferablynetwork controller 130, conveys (508) frames of MBMS data associated with the MBMS service to each ofNode Bs UE 102. WhenUE 102 receives (510) the frames of MBMS data, the UE stores the received frames inbuffer 108 of the UE. In addition, asRAN 140 is aware of, and therefore is able to determine (512), a correct start time, or starting frame, for the frames of MBMS data transmitted by eachneighbor Node B UE 102, then RAN 140, and inparticular network controller 130 or the Node B, determines (514), for eachneighbor Node B - In order to limit the size, in terms of bits, of the NCSI, the NCSIs need only differentiate among the potential start times, or frames of MBMS data, that fall within a ‘combining window’ around the start time on the serving cell. There are a finite number of potential start times within a combining window because the UE must know when a new block of data will be transmitted. In order to allow the UE to know when the new block of data will be transmitted, the W-CDMA standard indicates the time period over which a block of data will be transmitted (which is called a transmission time interval or “TTI”), and only allows each block of data on a given transport channel to begin on a radio frame that is an even multiple of the number of radio frames in a TTI. The ‘combining window’ is window of time, or frames, that is, at the largest, plus/minus one (1) TTI plus one slot from the start time of the MBMS service as provided in the scheduling information by serving
Node B 123. As one of ordinary skill in the art is aware (and as is apparent by reference toFIG. 6 ), at most three (3) potential start times for aneighbor Node B RAN 140 determines an NCSI that maps to an NCSI determined byUE 102 but that is unique for each frame in the ‘combining window,’ the RAN and UE may use a same algorithm to determine the NCSIs and may further derive the NCSI from information that is unique to each such frame, such as a frame number. For example,RAN 140 may determine the NCSI for each neighboringNode B
neighbor cell start indication=(CFN_Start(i)/{Max— TTI_Size})mod 4,
where CFN_Start(i) is the frame number corresponding to the start time/starting frame, and Max_TTI_Size is the largest TTI on the S-CCPCHs that may be soft combined.Network controller 130 then conveys (516) toUE 102 via servingNode B 123, and the UE receives (518) from the network controller, the NCSI determined for eachneighbor Node B - On the
UE 102 side, based on the serving Node B scheduling information, more particularly the provided start time, and a largest TTI size used bycommunication system 100 on the S-CCPCHs that may be soft combined (Max_TTI_Size), the UE determines (520) one or more potential start times, in radio frames, for each soft combinableneighbor Node B 120, 126 (or associated coverage areas or downlink) and in association with the frames received from the Node B to produce one or more potential start times for eachneighbor Node B UE 102 may determine CFNs that fulfill the following equation,
CFN mod Max_TTI_Size=0
where ‘mod’ indicates modulo division. - Due to transmission delays between the serving Node B, that is,
Node B 123, and each of the neighbor Node Bs, that is,Node Bs RAN 140 is likely to determine multiple potential start times for each neighbor Node B. However, by restricting a determination of potential start time for aneighbor Node B Node B 123, a minimal number, that is, at most three (3), potential start times may be determined for eachneighbor Node B -
UE 102 further determines (522), in association with each of the at least one potential start times determined for eachneighbor Node B UE 102 uses the same algorithm asRAN 104 in determining the NCSIs so that the determinations are aligned, such as the equation ‘neighbor cell start indication=(CFN_Start(i)/{Max_TTI_Size})mod 4.’ - For each
neighbor Node B UE 102 then determines (524) a soft combining start time by matching one of one or more NCSIs determined byUE 102 in association with each of the one or more potential start times/frames for the Node B and the NCSI for the Node B received fromRAN 140.Logic flow 500 then ends (526). - In order to assist the reader in understanding the principles of the present invention and not intending to limit the invention in any way, an exemplary timing diagram is provided in
FIG. 6 that illustrates a detection of a soft combining start time by a UE, such asUE 102, for each ofneighbor Node Bs 120 and 126 (or associated coverage areas or downlinks 112, 118) in accordance with the method described in logic flow diagram 500. InFIG. 6 , a Max_TTI_Size=8. InFIG. 6 , thick lines indicate potential soft combining start times, thinner lines indicate a start of a frame, and the arrows indicate the soft combining start times for eachNode B FIG. 6 , the potential soft combining start times, or starting frames, as well as non-potential starting frames, are designated as M(N), wherein M corresponds to the radio frame number, preferably the CFN, of the frame, and N is the NCSI calculated for the frame. - As depicted in
FIG. 6 , with respect to servingNode B 123, the start of the soft combining period isCFN 32.UE 102 knowsneighbor Node Bs UE 102 calculates potential start times within a ‘combining window’ that is up to 1 TTI earlier and 1 TTI later than the current serving Node B or coverage area. - As depicted in
FIG. 6 , forNode B 120, potential start times, or frames, 112 and 120 both fall in the combining window.UE 102 calculates an NCSI for each potential start time/frame, with the result that potential start time/frame 112 is associated with an NCSI with a value of ‘2’ and potential start time/frame 120 is associated with an NCSI with a value of ‘3.’ These potential start times/frames forNode B 120 are therefore depicted inFIG. 6 as 112(2) and 120(3). - For
Node B 126, one potential start time, or frame, that is, start time/frame 224, exactly matches the start time/frame of servingNode B 123 and as a result, three potential start times, or frames, 216, 224, 232 all fall in the combining window forNode B 123.UE 102 calculates an NCSI for each potential start time/frame, with the result that potential start time/frame 216 is associated with an NCSI with a value of ‘3,’ potential start time/frame 224 is associated with an NCSI with a value of ‘0,’ and potential start time/frame 232 is associated with an NCSI with a value of ‘1.’ These potential start times/frames forNode B 126 are therefore depicted inFIG. 6 as 216(3), 224(0) and 232(1). - In order to resolve uncertainty concerning the correct start time for each of
Node B 120 andNode B 126,network controller 130 conveys toUE 102 an NCSI for each such Node B. The NCSI provided by the RAN indicates which of one or more NCSIs determined by the UE for eachNode B FIG. 6 ,network controller 130 will convey toUE 102 an NCSI with a value of ‘2’ forNode B 120 and an NCSI with a value of ‘0’ forNode B 126. By utilizing the NCSIs provided by the RAN,UE 102 is able to determine that the start time/frame forNode B 120 is 112 and that the start time/frame forNode B 126 is 224. - In summarization,
communication system 100 provides for a provision, via a single, serving Node B, that is,Node B 123, of all scheduling information required by a UE, that is,UE 102, to determine a start time for all other Node Bs, that isNode Bs Node Bs - In one embodiment of the present invention, a ‘coverage area specific,’ or ‘Node B specific,’ embodiment, a transmission delay (or ‘offset’) between neighboring coverage areas, or Node Bs, is approximately the same regardless of the MBMS service provided. As a result, the scheduling information conveyed to the UE need not include a separate offset for each MBMS service. Instead, a network controller, that is
network controller 130, may convey scheduling information the UE that includes a transmission delay for each neighbor Node B of the multiple Node Bs and service scheduling information for each MBMS service. In turn, the service scheduling information for each MBMS service may include a reference start time for the MBMS service and a scheduling duration for the MBMS service. - In another embodiment of the present invention, a ‘service specific’ embodiment, the transmission delays between the multiple Node Bs may not be the same for all MBMS services. As a result, instead of providing a delay for each neighbor (non-serving) Node B and a single start time and schedule duration for each MBMS service, the network controller may provide service scheduling information that is specific to each soft combinable MBMS service and Node B, which service scheduling information includes a specific start time for each MBMS service at each Node B of the multiple Node Bs. To facilitate soft combining, preferably each Node B of the multiple Node Bs uses a same scheduling duration. As a result, the service scheduling information may further include a specific scheduling duration for each MBMS service at each Node B of the multiple Node Bs or may include only a single scheduling duration for each MBMS service.
- In yet another embodiment of the present invention, the network controller may convey scheduling information relating to only a single Node B, the serving Node B, to the UE. Based on the provided scheduling information, the UE is able to determine one or more potential start times for each non-serving Node Bs of the multiple Node Bs. For each non-serving Node B, the network controller further conveys to the UE an identifier (NCSI) of which potential start time of the one or more other potential start time is the correct start time for provision of the MBMS service via that Node B. Based on the received indicators, the UE is able to determine a start time for provision of the MBMS service via each non-serving Node B.
- The above embodiments of the present invention do not require that the multicasts of frames of data associated with an MBMS service by
different Node Bs UE 102, the UE is able to determine a start time of a soft combining period for each of thedownlinks corresponding Node Bs UE 102 may then determine a frame difference, such as an SFN difference or a CFN difference, between two Node Bs whose multicasts may be soft combined and combine the transport blocks received from each Node B based on the SFN difference. ThusUE 102 may simply choose the TTIs from each ofmultiple downlinks corresponding Node Bs - However, in both the ‘coverage area specific’ and the ‘service specific’ embodiments, it is preferable that a difference in time between multicasts of a same MBMS frame by different Node Bs be constrained so as to minimize a likelihood that soft combining
buffer 108 ofUE 102 will not be able to store and soft combine MBMS data received from each of the multiple softcombinable Node Bs communication system 100 further provides for a synchronizing of the multicasts of a same MBMS service by each of softcombinable Node Bs - Referring now to
FIGS. 7 and 8 , a procedure is illustrated by whichnetwork controller 130 measures and synchronizes a frame number difference, such as an SFN difference, between neighboring Node Bs, suchs Node Bs Node Bs network controller 130 is able to assure that the transmission delays, or offsets, between the Node Bs are small enough such that soft combining the transport blocks will not exceed the buffer size of soft combiningbuffer 108 ofUE 102. -
FIG. 7 is an exemplary timing diagram 700 that illustrates a method by which anetwork controller 130 may synchronize multiple Node Bs, such asNode B 123 andNode B 126, in accordance with an embodiment of the present invention.FIG. 8 is a logic flow diagram 800 of the synchronization of the multiple Node Bs bynetwork controller 130 in accordance with an embodiment of the present invention. Logic flow diagram 800 begins (802) when an MBMS service is setup (804) andnetwork controller 130 establishes (806) radio bearers, such as PTM communication channels, in each of a first coverage area that is served by a first Node B, such asNode B 123, and a second coverage area that is served by a second Node B, such asNode B 126.Network controller 130 then performs a node synchronization procedure withNode B 123 andNode B 126. - As part of the synchronization procedure,
network controller 130 determines (808), for each of the first Node B, that is,Node B 123, and the second Node B, that isNode B 126, a Node B Frame Number (BFN) associated with an arrival of a transport block at the Node B, which transport block is sent at acertain network controller 130 Frame Number (RFN). This is the RFN-BFN difference, which is also determined bynetwork controller 130 for each of the first andsecond Node Bs - For example, as depicted in
FIG. 7 ,network controller 130 obtains the information of frame numbers at points in times T1-1, T2-1, T3-1 and T4-1 forNode B 123. Similarly,network controller 130 obtains the information of frame numbers at points in times T1-2, T2-2, T3-2 and T4-2 forNode B 126. Each of T1, T2, T3, are measured as a frame number (RFN or BFN) that corresponds to a time increment of 0.125 ms. For example, with respect toNode B 123, T1-1 is assumed to be 1471.125 and T2-1 is assumed to be 29445.625. That is, a transport block sent bynetwork controller 130 with an RFN 1471.125 arrives atNode B 123 at a BFN 29445.625, resulting in a time difference or frame number difference (RFN-BFN difference) of 27974.500. With respect toNode B 126, a transport block that is sent bynetwork controller 130 at T1-2 with an RFN 1467.75 arrives atNode B 126 at T2-2 at a BFN 40030.125. So the RFN-BFN difference with respect toNode B 126 is 38542.375. The RFN-BFN difference may be simplified by converting the units to units of 10 ms. The RFN-BFN difference ofNode B 123 is then 2797 and the RFN-BFN difference ofNode B 126 is then 3856. - Based on the RFN-BFN differences of each of the first and
second Node Bs network controller 130 is able to determine (810) that the BFN difference between the first and second coverage areas, that is, between the transmissions byNode B 123 and transmissions byNode B 126, is 1059.Network controller 130 may then synchronize (812) transmission of an MBMS service by each offirst Node B 123 andsecond Node B 126 based on the determined BFN difference. For example, assume that for the first coverage area orNode B 123, the starting SFN for the MBMS service that is being soft combined is set to X.Network controller 130 then may set the starting SFN for the same service in the second coverage area, that is, atNode B 126, to X+1059.Logic flow 800 then ends (814). - Thus
communication system 100 provides for a synchronization, by a UE, of received MBMS data that is multicast to the UE via each of multiple Node Bs so that the UE may soft combine the data and further provides for a synchronization by a network controller of the multicasts of the MBMS data by the multiple Node Bs. - While the present invention has been particularly shown and described with reference to particular embodiments thereof, it will be understood by those skilled in the art that various changes may be made and equivalents substituted for elements thereof without departing from the scope of the invention as set forth in the claims below. Accordingly, the specification and figures are to be regarded in an illustrative rather then a restrictive sense, and all such changes and substitutions are intended to be included within the scope of the present invention.
- Benefits, other advantages, and solutions to problems have been described above with regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any element(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature or element of any or all the claims. As used herein, the terms “comprises,” “comprising,” or any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, unless otherwise indicated herein, the use of relational terms, if any, such as first and second, top and bottom, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Claims (44)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/318,976 US20060146745A1 (en) | 2005-01-05 | 2005-12-27 | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service |
EP06717611A EP1836787A4 (en) | 2005-01-05 | 2006-01-05 | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service |
JP2007500847A JP4617352B2 (en) | 2005-01-05 | 2006-01-05 | Method and apparatus for scheduling and synchronizing multimedia broadcast / multicast services |
PCT/US2006/000437 WO2006074355A2 (en) | 2005-01-05 | 2006-01-05 | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service |
US12/115,725 US8638706B2 (en) | 2005-01-05 | 2008-05-06 | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US64150305P | 2005-01-05 | 2005-01-05 | |
US11/318,976 US20060146745A1 (en) | 2005-01-05 | 2005-12-27 | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/115,725 Division US8638706B2 (en) | 2005-01-05 | 2008-05-06 | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060146745A1 true US20060146745A1 (en) | 2006-07-06 |
Family
ID=36640289
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/318,976 Abandoned US20060146745A1 (en) | 2005-01-05 | 2005-12-27 | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service |
US12/115,725 Expired - Fee Related US8638706B2 (en) | 2005-01-05 | 2008-05-06 | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/115,725 Expired - Fee Related US8638706B2 (en) | 2005-01-05 | 2008-05-06 | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service |
Country Status (4)
Country | Link |
---|---|
US (2) | US20060146745A1 (en) |
EP (1) | EP1836787A4 (en) |
JP (1) | JP4617352B2 (en) |
WO (1) | WO2006074355A2 (en) |
Cited By (84)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070127399A1 (en) * | 2005-12-05 | 2007-06-07 | Nec Corporation | Packet joining method, program, and apparatus |
US20070253360A1 (en) * | 2006-05-01 | 2007-11-01 | Rehan Jalil | Method and system for communicating a plurality of packets in multicast broadcast service (mbs) communication network |
KR100774365B1 (en) | 2006-12-07 | 2007-11-08 | 한국전자통신연구원 | Method for providing multicast broadcast service in communication system |
US20070268861A1 (en) * | 2006-05-16 | 2007-11-22 | Diachina John W | Bi-Directional RLC Non-Persistent Mode for Low Delay Services |
WO2008004080A2 (en) * | 2006-06-30 | 2008-01-10 | Nokia Corporation | Macrodiversity arrangement for a multicast service on a high-speed transport channel |
US20080045224A1 (en) * | 2006-08-21 | 2008-02-21 | Interdigital Technology Corporation | Multi-cell coordination for multimedia broadcast multicast services in a wireless communication system |
WO2008024214A2 (en) * | 2006-08-21 | 2008-02-28 | Interdigital Technology Corporation | Multi-cell coordination for multimedia broadcast multicast services in a wireless communication system |
US20080082698A1 (en) * | 2006-09-29 | 2008-04-03 | Rosemount, Inc. | Wireless handheld configuration device for a securable wireless self-organizing mesh network |
US20080089398A1 (en) * | 2006-10-12 | 2008-04-17 | Cormier Daniel R | Determining a mode to transmit data |
US20080089265A1 (en) * | 2006-10-15 | 2008-04-17 | Samsung Electronics Co., Ltd. | System and method for transmitting/receiving multicast/broadcast signal in a communication system |
US20080101334A1 (en) * | 2006-10-31 | 2008-05-01 | Alcatel Lucent | Method for distribution of data packets in a single frequency mobile communication network, an access network node, a base station and a single frequency mobile communication network therefor |
US20080101282A1 (en) * | 2006-10-25 | 2008-05-01 | Nce Corporation | Mobile communication system, core network apparatus, and mbms data transmission method used for the same |
US20080112426A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Adaptive control channel initialization operations for autonomous dynamic spectrum access systems |
US20080113624A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Method and apparatus for adjusting waveform parameters for an adaptive air interface waveform |
US20080112428A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Scheduling for autonomous dynamic spectrum access systems |
US20080112341A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Method and system for using selected bearer channels |
US20080112427A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Autonomous dynamic spectrum access |
US20080113667A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Bearer selection and negotiation in autonomous dynamic spectrum access systems |
US20080170557A1 (en) * | 2005-04-21 | 2008-07-17 | Yin Liyan | Method For Measuring Different Frequencies/Systems in Mbms and a Device For Setting Measuring Time |
KR100876500B1 (en) | 2007-01-17 | 2008-12-31 | 한국정보통신대학교 산학협력단 | WiBro channel allocation method for real time broadcasting service |
US20090005095A1 (en) * | 2006-06-21 | 2009-01-01 | Sung Duck Chun | Method for Reconfiguring Radio Link in Wireless Communication System |
EP2012482A2 (en) | 2007-07-05 | 2009-01-07 | China Mobile Communications Corporation | Methods and related apparatus for transmitting and receiving resource scheduling information and scheduling resources |
US20090010181A1 (en) * | 2007-07-05 | 2009-01-08 | China Mobile Communications Corporation | Method and apparatus for transmitting and receiving the configuration mode of service carrier frequency time slots |
US20090016254A1 (en) * | 2006-01-05 | 2009-01-15 | Lee Young-Dae | Point-to-Multipoint Service Communication |
US20090046617A1 (en) * | 2007-05-30 | 2009-02-19 | Qualcomm Incorporated | Method and apparatus for sending scheduling information for broadcast and multicast services in a cellular communication system |
US20090047942A1 (en) * | 2007-08-13 | 2009-02-19 | Qualcomm Incorporated | Method and apparatus for supporting broadcast and multicast services in a wireless communication system |
US20090047912A1 (en) * | 2006-01-05 | 2009-02-19 | Young Dae Lee | Method of transmitting feedback information in a wireless communication system |
US20090116449A1 (en) * | 2006-02-08 | 2009-05-07 | Ntt Docomo, Inc. | Channel transmission method and base station |
EP2068465A1 (en) * | 2006-09-26 | 2009-06-10 | Mitsubishi Electric Corporation | Data communication method and mobile communication system |
EP2068523A1 (en) * | 2006-08-22 | 2009-06-10 | Alcatel Shanghai Bell Co., Ltd. | Gateway device, base station device, communication network and synchronization method |
US20090168681A1 (en) * | 2008-01-02 | 2009-07-02 | Billy Gayle Moon | Mechanism for wireless multicast |
WO2009084931A1 (en) * | 2007-12-17 | 2009-07-09 | Lg Electronics Inc. | Method for obtaining synchronization signal in wireless communication system |
US20090219868A1 (en) * | 2006-01-05 | 2009-09-03 | Young Dae Lee | Method for scheduling radio resources in mobile communication system |
US20090257407A1 (en) * | 2006-02-07 | 2009-10-15 | Sung-Jun Park | Preamble retransmission method in mobile communications system |
US20090259909A1 (en) * | 2008-04-15 | 2009-10-15 | Qualcomm Incorporated | Physical harq indicator channel (phich) resource assignment signaling in a wireless communication environment |
US20100039979A1 (en) * | 2008-08-13 | 2010-02-18 | Fujitsu Limited | Broadcast and multicast service communication method, base station, and mobile station |
US20100062775A1 (en) * | 2008-09-11 | 2010-03-11 | Hwang Chan Soo | Data communication network and data communication method using transmission of soft-decision information |
US20100062795A1 (en) * | 2006-01-05 | 2010-03-11 | Young Dae Lee | Method of transmitting/receiving a paging message in a wireless communication system |
US20100074159A1 (en) * | 2006-09-26 | 2010-03-25 | Shohei Yamada | Position managing device, mobile station device, base station device, frequency layer control method, program, and recording medium |
US20100118713A1 (en) * | 2006-10-31 | 2010-05-13 | Volker Breuer | Scheduling of measurement occasions of a mobile terminal |
WO2010054547A1 (en) * | 2008-11-13 | 2010-05-20 | 中兴通讯股份有限公司 | Synchronization scheduling method |
US20100159933A1 (en) * | 2008-12-19 | 2010-06-24 | Electronics And Telecommunications Research Institute | Method for evolved multimedia broadcast/multicast service |
US20100260056A1 (en) * | 2007-10-24 | 2010-10-14 | Kenichi Takai | Mobile Communication System, Common Channel Transmission Control Device, and Common Channel Transmission Control Method Used in the System and Device |
US20100265857A1 (en) * | 2007-07-23 | 2010-10-21 | Xuelong Wang | Method and apparatus for transmitting and receiving multimedia broadcast multicast services |
EP2254257A1 (en) * | 2009-05-19 | 2010-11-24 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Method and processing unit for processing signals with macro diversity |
EP2278831A1 (en) * | 2008-04-30 | 2011-01-26 | ZTE Corporation | Synchronization method of common control message among network elements |
US20110032891A1 (en) * | 2006-02-07 | 2011-02-10 | Young Dae Lee | Method for transmitting response information in mobile communications system |
US20110039590A1 (en) * | 2006-01-05 | 2011-02-17 | Sung-Jun Park | Allocating radio resources in mobile communication system |
US20110093754A1 (en) * | 2006-01-05 | 2011-04-21 | Sung Duck Chun | Data transmission method and data re-transmission method |
US20110116429A1 (en) * | 2008-06-11 | 2011-05-19 | Lg Electronics Inc. | Apparatus for controlling power of wireless device and method thereof |
EP2326119A1 (en) * | 2008-09-22 | 2011-05-25 | Huawei Technologies Co., Ltd. | Method, device and user equipment for transmitting multi-cell scheduling information |
US20110128948A1 (en) * | 2008-06-11 | 2011-06-02 | Lg Electronics Inc. | Apparatus and method for transmitting and receiving data |
US20110141962A1 (en) * | 2009-12-15 | 2011-06-16 | Electronics And Telecommunications Research Institute | Method and apparatus for demodulating multicast signal |
US20110199973A1 (en) * | 2008-09-18 | 2011-08-18 | Huawei Technologies Co., Ltd. | Method, device, and system for configuring multicast broadcast single frequency network resources |
US20110216787A1 (en) * | 2008-11-12 | 2011-09-08 | Jianxun Ai | Method and apparatus of synchronization scheduling |
US8072938B2 (en) | 2006-01-05 | 2011-12-06 | Lg Electronics, Inc. | Method for handover in mobile communication system |
WO2012016205A1 (en) * | 2010-07-30 | 2012-02-02 | Qualcomm Incorporated | Method and apparatus for improved mbms capacity and link management through robust and performance optimal soft combining |
US8112091B2 (en) | 2006-01-05 | 2012-02-07 | Lg Electronics Inc. | Allocating radio resources in mobile communications system |
US8234534B2 (en) | 2006-06-21 | 2012-07-31 | Lg Electronics Inc. | Method of supporting data retransmission in a mobile communication system |
US8243665B2 (en) | 2006-02-07 | 2012-08-14 | Lg Electronics Inc. | Method for selection and signaling of downlink and uplink bandwidth in wireless networks |
US8248924B2 (en) | 2006-06-21 | 2012-08-21 | Lg Electronics Inc. | Uplink access method of mobile communication system |
US8340026B2 (en) | 2006-01-05 | 2012-12-25 | Lg Electronics Inc. | Transmitting data in a mobile communication system |
US20130064164A1 (en) * | 2011-09-09 | 2013-03-14 | Electronics And Telecommunications Research Institute | Method and apparatus for managing multicast service |
US8428086B2 (en) | 2006-01-05 | 2013-04-23 | Lg Electronics Inc. | Transmitting data in a mobile communication system |
CN103179656A (en) * | 2011-12-20 | 2013-06-26 | 中兴通讯股份有限公司 | Method and system for transmitting business flow synchronously in heterogeneous network |
US8493854B2 (en) | 2006-02-07 | 2013-07-23 | Lg Electronics Inc. | Method for avoiding collision using identifier in mobile network |
US20130250839A1 (en) * | 2009-04-21 | 2013-09-26 | Electronics And Telecommunications Research Institute | Method and device for acquiring synchronization between nodes and method for organizing multiple physical channels |
US8570956B2 (en) | 2006-06-21 | 2013-10-29 | Lg Electronics Inc. | Method of communicating data in a wireless mobile communications system using message separation and mobile terminal for use with the same |
US20130288728A1 (en) * | 2011-02-07 | 2013-10-31 | Alexei Davydov | Co-phasing of transmissions from multiple infrastructure nodes |
US8625526B2 (en) | 2008-01-03 | 2014-01-07 | Lg Electronics Inc. | Method for obtaining synchronization signal in wireless communication system |
US8638707B2 (en) | 2006-06-21 | 2014-01-28 | Lg Electronics Inc. | Method for supporting quality of multimedia broadcast multicast service (MBMS) in mobile communications system and terminal thereof |
US8644250B2 (en) | 2006-01-05 | 2014-02-04 | Lg Electronics Inc. | Maintaining communication between mobile terminal and network in mobile communication system |
US20140133444A1 (en) * | 2005-03-25 | 2014-05-15 | Neocific, Inc. | Methods and apparatus for cellular broadcasting and communication system |
US20140325580A1 (en) * | 2013-04-24 | 2014-10-30 | Telefonaktiebolaget L M Ericsson (Publ) | File Scheduling in BM-SC |
US8971288B2 (en) | 2006-03-22 | 2015-03-03 | Lg Electronics Inc. | Method of supporting handover in a wireless communication system |
US9094938B2 (en) | 2009-08-25 | 2015-07-28 | Zte Corporation | Method and system for transmitting dynamic scheduling information |
US9226266B2 (en) | 2013-09-03 | 2015-12-29 | Telefonaktiebolaget L M Ericsson (Publ) | Method for determining delay parameters for user data flow synchronization for eMBMS |
CN106102020A (en) * | 2006-08-21 | 2016-11-09 | 交互数字技术公司 | The access gateway in SFN, multiple e node B being controlled |
US20170026963A1 (en) * | 2013-11-27 | 2017-01-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for Allocation of Time Transmission Intervals |
WO2017197634A1 (en) | 2016-05-20 | 2017-11-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for robustness enhancement in a wireless communication system |
US10327111B2 (en) * | 2014-10-30 | 2019-06-18 | Lg Electronics Inc. | MBMS operation method performed by terminal in wireless communication system and terminal using same |
US10659245B2 (en) * | 2011-10-11 | 2020-05-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Technique for delivering schedule information for an MBMS user service |
US20200259676A1 (en) * | 2005-06-09 | 2020-08-13 | Neo Wireless Llc | Methods and apparatus for power efficient broadcasting and communication systems |
US11483832B1 (en) | 2010-09-28 | 2022-10-25 | Neo Wireless Llc | Methods and apparatus for flexible use of frequency bands |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2006202144A1 (en) * | 2005-06-23 | 2007-01-11 | Nec Australia Pty Ltd | MBMS soft combining scheme |
JP4447575B2 (en) * | 2006-05-01 | 2010-04-07 | 株式会社エヌ・ティ・ティ・ドコモ | Transmitting apparatus and transmitting method |
RU2436249C2 (en) * | 2006-06-14 | 2011-12-10 | Конинклейке Филипс Электроникс Н.В. | Method of transmitting data in communication systems |
US7912057B2 (en) * | 2007-01-12 | 2011-03-22 | Wi-Lan Inc. | Convergence sublayer for use in a wireless broadcasting system |
US8774229B2 (en) * | 2007-01-12 | 2014-07-08 | Wi-Lan, Inc. | Multidiversity handoff in a wireless broadcast system |
US8064444B2 (en) * | 2007-01-12 | 2011-11-22 | Wi-Lan Inc. | Wireless broadcasting system |
US7944919B2 (en) * | 2007-01-12 | 2011-05-17 | Wi-Lan, Inc. | Connection identifier for wireless broadcast system |
US8548520B2 (en) | 2007-01-26 | 2013-10-01 | Wi-Lan Inc. | Multiple network access system and method |
CN101272518B (en) * | 2007-03-21 | 2012-07-25 | 上海贝尔股份有限公司 | Scheduling method and scheduling equipment aiming at MBMS, and base station including the equipment |
EP2140647A4 (en) * | 2007-03-28 | 2014-05-21 | Ericsson Telefon Ab L M | Measurement of cell-specific reference symbols in the presence of mbms single frequency network transmissions |
US7903604B2 (en) * | 2007-04-18 | 2011-03-08 | Wi-Lan Inc. | Method and apparatus for a scheduler for a macro-diversity portion of a transmission |
US8711833B2 (en) * | 2007-04-18 | 2014-04-29 | Wi-Lan, Inc. | Base station synchronization for a single frequency network |
US20080263130A1 (en) * | 2007-04-23 | 2008-10-23 | Nir Michalowitz | Apparatus, system and method of digital content distribution |
JP4924322B2 (en) * | 2007-09-21 | 2012-04-25 | 富士通株式会社 | Frame synchronization method and base station controller |
KR101188550B1 (en) * | 2007-10-29 | 2012-10-09 | 인터디지탈 패튼 홀딩스, 인크 | System information updates in lte |
CN101465745B (en) * | 2007-12-19 | 2012-10-03 | 华为技术有限公司 | Method, device and system for sending multicast and multicast business data |
DE602008002425D1 (en) * | 2008-06-23 | 2010-10-14 | Alcatel Lucent | Signal allocation method and apparatus therefor |
WO2010008221A2 (en) * | 2008-07-17 | 2010-01-21 | Samsung Electronics Co., Ltd. | Method and apparatus for recognizing multicast and broadcast service region in broadband wireless communication system |
US8284652B2 (en) * | 2008-10-28 | 2012-10-09 | Qualcomm Incorporated | Enhanced forward link transmission |
JP5718642B2 (en) | 2008-10-31 | 2015-05-13 | 日本電気株式会社 | Mobile communication system, core network node, control station, base station, communication method, program |
US9497731B2 (en) | 2008-10-31 | 2016-11-15 | Nec Corporation | Mobile communication system, control station, base station, communication method and program |
US8644826B2 (en) * | 2008-12-26 | 2014-02-04 | Nec Corporation | Wireless communication system, communication control method, radio base station, radio terminal, and storage medium |
CN102301752A (en) * | 2009-04-28 | 2011-12-28 | 上海贝尔股份有限公司 | Method And Apparatus For Controlling Mbms Service Reception In Wireless Communication System |
JP5349682B2 (en) * | 2009-04-29 | 2013-11-20 | アルカテル−ルーセント | Method of multiplexing MBMS service in MBSFN, BM-SC, and base station |
US9106378B2 (en) * | 2009-06-10 | 2015-08-11 | Qualcomm Incorporated | Systems, apparatus and methods for communicating downlink information |
CN101938697A (en) * | 2009-06-29 | 2011-01-05 | 大唐移动通信设备有限公司 | Synchronous dispatching method, device and system |
US9144037B2 (en) * | 2009-08-11 | 2015-09-22 | Qualcomm Incorporated | Interference mitigation by puncturing transmission of interfering cells |
US8599768B2 (en) * | 2009-08-24 | 2013-12-03 | Intel Corporation | Distributing group size indications to mobile stations |
US8724563B2 (en) * | 2009-08-24 | 2014-05-13 | Qualcomm Incorporated | Method and apparatus that facilitates detecting system information blocks in a heterogeneous network |
US9277566B2 (en) | 2009-09-14 | 2016-03-01 | Qualcomm Incorporated | Cross-subframe control channel design |
US8942192B2 (en) | 2009-09-15 | 2015-01-27 | Qualcomm Incorporated | Methods and apparatus for subframe interlacing in heterogeneous networks |
US9125072B2 (en) | 2010-04-13 | 2015-09-01 | Qualcomm Incorporated | Heterogeneous network (HetNet) user equipment (UE) radio resource management (RRM) measurements |
US9392608B2 (en) | 2010-04-13 | 2016-07-12 | Qualcomm Incorporated | Resource partitioning information for enhanced interference coordination |
US9271167B2 (en) | 2010-04-13 | 2016-02-23 | Qualcomm Incorporated | Determination of radio link failure with enhanced interference coordination and cancellation |
US9226288B2 (en) * | 2010-04-13 | 2015-12-29 | Qualcomm Incorporated | Method and apparatus for supporting communications in a heterogeneous network |
US8886190B2 (en) | 2010-10-08 | 2014-11-11 | Qualcomm Incorporated | Method and apparatus for measuring cells in the presence of interference |
US9124944B1 (en) * | 2010-11-19 | 2015-09-01 | Marvell International Ltd. | Synchronization of control signal transmissions for a multicast service |
US8638131B2 (en) | 2011-02-23 | 2014-01-28 | Qualcomm Incorporated | Dynamic feedback-controlled output driver with minimum slew rate variation from process, temperature and supply |
US8819264B2 (en) * | 2011-07-18 | 2014-08-26 | Verizon Patent And Licensing Inc. | Systems and methods for dynamically switching between unicast and multicast delivery of media content in a wireless network |
US10484836B2 (en) | 2017-05-23 | 2019-11-19 | Qualcomm Incorporated | Techniques and apparatuses for long term evolution idle-mode and enhanced multimedia broadcast and multicast service concurrency operation |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040008646A1 (en) * | 2002-04-27 | 2004-01-15 | Samsung Electronics Co., Ltd. | Soft handover method for multimedia broadcast/multicast service in a CDMA mobile communication system |
US20040105402A1 (en) * | 2002-08-14 | 2004-06-03 | Seung-June Yi | Method for scheduling transmission of MBMS data in UMTS |
Family Cites Families (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE460449B (en) | 1988-02-29 | 1989-10-09 | Ericsson Telefon Ab L M | CELL DIVIDED DIGITAL MOBILE RADIO SYSTEM AND PROCEDURE TO TRANSFER INFORMATION IN A DIGITAL CELL DIVIDED MOBILE RADIO SYSTEM |
US5195091A (en) | 1991-07-09 | 1993-03-16 | At&T Bell Laboratories | Adaptive synchronization arrangement |
JP3250762B2 (en) | 1993-05-21 | 2002-01-28 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile communication system base station synchronization method |
WO1994030024A1 (en) | 1993-06-14 | 1994-12-22 | Telefonaktiebolaget Lm Ericsson | Time alignment of transmission in a down-link of a cdma system |
US5722074A (en) | 1993-09-24 | 1998-02-24 | Nokia Telecommunications Oy | Soft handoff in a cellular telecommunications system |
SE516723C2 (en) | 1994-12-08 | 2002-02-19 | Ericsson Telefon Ab L M | Method and device for uplink macro diversity in a digital mobile radio communication system |
FI102132B1 (en) | 1995-12-01 | 1998-10-15 | Nokia Mobile Phones Ltd | Use of the ATM cell's title field in radio-mediated ATM communication |
EP0845877A3 (en) | 1996-11-28 | 2002-03-27 | Oki Electric Industry Co., Ltd. | Mobile communication system for accomplishing handover with phase difference of frame sync signals corrected |
US6216004B1 (en) | 1998-06-23 | 2001-04-10 | Qualcomm Incorporated | Cellular communication system with common channel soft handoff and associated method |
US7177658B2 (en) * | 2002-05-06 | 2007-02-13 | Qualcomm, Incorporated | Multi-media broadcast and multicast service (MBMS) in a wireless communications system |
KR100566208B1 (en) * | 2002-06-14 | 2006-03-29 | 삼성전자주식회사 | Method and apparatus for soft combining of mbms service data in a cdma mobile communication system providing mbms service |
CN100493238C (en) * | 2002-08-16 | 2009-05-27 | 北京三星通信技术研究有限公司 | MBMS point to point channel and point to multipoint channel switching mehtod |
US7586874B2 (en) * | 2003-01-06 | 2009-09-08 | Interdigital Technology Corporation | Wireless communication method and apparatus for providing multimedia broadcast services |
US7058407B2 (en) * | 2003-05-12 | 2006-06-06 | Motorola, Inc. | Adapting a diversity transmission mode in a wireless communication system |
EP1677442B1 (en) * | 2003-08-21 | 2014-04-23 | Ntt Docomo, Inc. | Mobile communication system, mobile station, and radio control device |
KR100762669B1 (en) * | 2004-03-15 | 2007-10-01 | 삼성전자주식회사 | Method and system for soft combining in multimedia broadcast/multicast service system |
GB0407929D0 (en) * | 2004-04-07 | 2004-05-12 | Samsung Electronics Co Ltd | Mobile communications |
US7636331B2 (en) * | 2004-04-19 | 2009-12-22 | Lg Electronic Inc. | Transmission of control information in wireless communication system |
KR20050107145A (en) * | 2004-05-07 | 2005-11-11 | 삼성전자주식회사 | Method for effectively notifying mbms data transmission to an ue considering a transmission mode in multimedia broadcast/multicast service |
US7920884B2 (en) * | 2004-06-04 | 2011-04-05 | Qualcomm Incorporated | Frame structures for a wireless communication system with multiple radio technologies |
KR101054957B1 (en) * | 2004-08-12 | 2011-08-05 | 엘지전자 주식회사 | Control message transmission and reception method for multicast and broadcast service |
US7675891B2 (en) * | 2004-09-23 | 2010-03-09 | Telefonakiebolaget L M Ericsson (Publ) | Multimedia reception in communication networks |
RU2340118C1 (en) * | 2004-09-30 | 2008-11-27 | Самсунг Электроникс Ко., Лтд. | Method and device for partial combination for multimedia broadcasting/multicast transmission service |
US20060098676A1 (en) * | 2004-11-08 | 2006-05-11 | Motorola, Inc. | Method and apparatus to facilitate macrodiversity reception |
KR101119100B1 (en) * | 2005-01-03 | 2012-03-16 | 엘지전자 주식회사 | Method for Transmitting and Receivng Data Blocks |
KR100970642B1 (en) * | 2005-03-28 | 2010-07-15 | 엘지전자 주식회사 | Method for Receiving MBMS Transport Blocks |
KR101154961B1 (en) * | 2005-05-04 | 2012-06-18 | 엘지전자 주식회사 | Method of transmitting and receiving transmission power of radio channel and method of providing point-to-multipoint multimedia service |
EP1755355B1 (en) * | 2005-08-16 | 2011-12-21 | Panasonic Corporation | Method and apparatuses for resetting a transmission sequence number (TSN) |
US20070135153A1 (en) * | 2005-12-12 | 2007-06-14 | Zhijun Cai | Methods and apparatus for providing a transmit signal strength message |
US8059625B2 (en) * | 2006-02-03 | 2011-11-15 | Motorola Mobility, Inc. | Distributed architecture and methods for broadcast/multicast service |
US8068465B2 (en) * | 2006-10-31 | 2011-11-29 | Motorola Mobility, Inc. | Wireless multicast broadcast service methods and apparatus |
US8260292B2 (en) * | 2007-02-15 | 2012-09-04 | Lg Electronics Inc. | Hierarchical service list |
US7860107B2 (en) * | 2007-11-30 | 2010-12-28 | Ipwireless, Inc. | Apparatus and method for determining timing for transmissions |
-
2005
- 2005-12-27 US US11/318,976 patent/US20060146745A1/en not_active Abandoned
-
2006
- 2006-01-05 EP EP06717611A patent/EP1836787A4/en not_active Withdrawn
- 2006-01-05 JP JP2007500847A patent/JP4617352B2/en not_active Expired - Fee Related
- 2006-01-05 WO PCT/US2006/000437 patent/WO2006074355A2/en active Application Filing
-
2008
- 2008-05-06 US US12/115,725 patent/US8638706B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040008646A1 (en) * | 2002-04-27 | 2004-01-15 | Samsung Electronics Co., Ltd. | Soft handover method for multimedia broadcast/multicast service in a CDMA mobile communication system |
US20040105402A1 (en) * | 2002-08-14 | 2004-06-03 | Seung-June Yi | Method for scheduling transmission of MBMS data in UMTS |
Cited By (201)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11283640B2 (en) | 2005-03-25 | 2022-03-22 | Neo Wireless Llc | Bitmap based resource scheduling in a wireless network |
US11296900B2 (en) | 2005-03-25 | 2022-04-05 | Neo Wireless Llc | Broadcast signal indicating one or more subframe configurations |
US20190215174A1 (en) * | 2005-03-25 | 2019-07-11 | Neocific, Inc. | Methods and apparatus for cellular broadcasting and communication system |
US10862696B2 (en) * | 2005-03-25 | 2020-12-08 | Neo Wireless Llc | Methods and apparatus for cellular broadcasting and communication system |
US10044517B2 (en) * | 2005-03-25 | 2018-08-07 | Neocific, Inc. | Methods and apparatus for cellular broadcasting and communication system |
US11658838B2 (en) | 2005-03-25 | 2023-05-23 | Neo Wireless Llc | Broadcast signal indicating one or more subframe configurations |
US10931469B2 (en) * | 2005-03-25 | 2021-02-23 | Neo Wireless Llc | Methods and apparatus for cellular broadcasting and communication system |
US11115229B2 (en) | 2005-03-25 | 2021-09-07 | Neo Wireless Llc | Method and apparatus for periodic and polled channel quality feedback |
US20140133444A1 (en) * | 2005-03-25 | 2014-05-15 | Neocific, Inc. | Methods and apparatus for cellular broadcasting and communication system |
US20080170557A1 (en) * | 2005-04-21 | 2008-07-17 | Yin Liyan | Method For Measuring Different Frequencies/Systems in Mbms and a Device For Setting Measuring Time |
US8111628B2 (en) * | 2005-04-21 | 2012-02-07 | Huawei Technologies Co., Ltd. | Method for measuring different frequencies/systems in MBMS and a device for setting measuring time |
US20210195556A1 (en) * | 2005-06-09 | 2021-06-24 | Neo Wireless Llc | Method and apparatus for receiving broadcast information in an ofdm communication system |
US20200259676A1 (en) * | 2005-06-09 | 2020-08-13 | Neo Wireless Llc | Methods and apparatus for power efficient broadcasting and communication systems |
US11979248B2 (en) * | 2005-06-09 | 2024-05-07 | Neo Wireless Llc | Method and apparatus for receiving broadcast information in an OFDM communication system |
US20070127399A1 (en) * | 2005-12-05 | 2007-06-07 | Nec Corporation | Packet joining method, program, and apparatus |
US8542704B2 (en) * | 2005-12-05 | 2013-09-24 | Nec Corporation | Packet joining method, program, and apparatus |
US8644250B2 (en) | 2006-01-05 | 2014-02-04 | Lg Electronics Inc. | Maintaining communication between mobile terminal and network in mobile communication system |
US20090219868A1 (en) * | 2006-01-05 | 2009-09-03 | Young Dae Lee | Method for scheduling radio resources in mobile communication system |
US9955507B2 (en) | 2006-01-05 | 2018-04-24 | Lg Electronics Inc. | Maintaining communication between mobile terminal and network in mobile communication system |
US8072938B2 (en) | 2006-01-05 | 2011-12-06 | Lg Electronics, Inc. | Method for handover in mobile communication system |
US8090382B2 (en) | 2006-01-05 | 2012-01-03 | Lg Electronics Inc. | Allocating radio resources in mobile communication system |
US9456455B2 (en) | 2006-01-05 | 2016-09-27 | Lg Electronics Inc. | Method of transmitting feedback information in a wireless communication system |
US9397791B2 (en) | 2006-01-05 | 2016-07-19 | Lg Electronics Inc. | Transmitting data in a mobile communication system |
US9253801B2 (en) | 2006-01-05 | 2016-02-02 | Lg Electronics Inc. | Maintaining communication between mobile terminal and network in mobile communication system |
US8112091B2 (en) | 2006-01-05 | 2012-02-07 | Lg Electronics Inc. | Allocating radio resources in mobile communications system |
US8135420B2 (en) | 2006-01-05 | 2012-03-13 | Lg Electronics Inc. | Method of transmitting/receiving a paging message in a wireless communication system |
US8165596B2 (en) | 2006-01-05 | 2012-04-24 | Lg Electronics Inc. | Data transmission method and data re-transmission method |
US9036596B2 (en) | 2006-01-05 | 2015-05-19 | Lg Electronics Inc. | Transmitting data in a mobile communication system |
US20110093754A1 (en) * | 2006-01-05 | 2011-04-21 | Sung Duck Chun | Data transmission method and data re-transmission method |
US20090016254A1 (en) * | 2006-01-05 | 2009-01-15 | Lee Young-Dae | Point-to-Multipoint Service Communication |
US20110039590A1 (en) * | 2006-01-05 | 2011-02-17 | Sung-Jun Park | Allocating radio resources in mobile communication system |
US8244269B2 (en) | 2006-01-05 | 2012-08-14 | Lg Electronics Inc. | Allocating radio resources in mobile communications system |
US20090047912A1 (en) * | 2006-01-05 | 2009-02-19 | Young Dae Lee | Method of transmitting feedback information in a wireless communication system |
US8867449B2 (en) | 2006-01-05 | 2014-10-21 | Lg Electronics Inc. | Transmitting data in a mobile communication system |
US8750217B2 (en) | 2006-01-05 | 2014-06-10 | Lg Electronics Inc. | Method for scheduling radio resources in mobile communication system |
US8340026B2 (en) | 2006-01-05 | 2012-12-25 | Lg Electronics Inc. | Transmitting data in a mobile communication system |
USRE43949E1 (en) | 2006-01-05 | 2013-01-29 | Lg Electronics Inc. | Allocating radio resources in mobile communications system |
US8369865B2 (en) | 2006-01-05 | 2013-02-05 | Lg Electronics Inc. | Data transmission method and data re-transmission method |
US8396020B2 (en) * | 2006-01-05 | 2013-03-12 | Lg Electronics Inc. | Point-to-multipoint service communication |
US8428086B2 (en) | 2006-01-05 | 2013-04-23 | Lg Electronics Inc. | Transmitting data in a mobile communication system |
US20100062795A1 (en) * | 2006-01-05 | 2010-03-11 | Young Dae Lee | Method of transmitting/receiving a paging message in a wireless communication system |
US8238371B2 (en) | 2006-02-07 | 2012-08-07 | Lg Electronics Inc. | Method for operating enhanced RLC entity and RNC entity for WCDMA and system thereof |
US8223713B2 (en) | 2006-02-07 | 2012-07-17 | Lg Electronics Inc. | Method for transmitting response information in mobile communications system |
US8493854B2 (en) | 2006-02-07 | 2013-07-23 | Lg Electronics Inc. | Method for avoiding collision using identifier in mobile network |
US8451821B2 (en) | 2006-02-07 | 2013-05-28 | Lg Electronics Inc. | Method for transmitting response information in mobile communications system |
US8437335B2 (en) | 2006-02-07 | 2013-05-07 | Lg Electronics Inc. | Method for transmitting response information in mobile communications system |
US9706580B2 (en) | 2006-02-07 | 2017-07-11 | Lg Electronics Inc. | Method for transmitting response information in mobile communications system |
US8085738B2 (en) | 2006-02-07 | 2011-12-27 | Lg Electronics Inc. | Preamble retransmission method in mobile communications system |
US9462576B2 (en) | 2006-02-07 | 2016-10-04 | Lg Electronics Inc. | Method for transmitting response information in mobile communications system |
US8406190B2 (en) | 2006-02-07 | 2013-03-26 | Lg Electronics Inc. | Method for transmitting response information in mobile communications system |
US8175052B2 (en) | 2006-02-07 | 2012-05-08 | Lg Electronics Inc. | Method for transmitting response information in mobile communications system |
US8068473B2 (en) | 2006-02-07 | 2011-11-29 | Lg Electronics Inc. | Method for operating enhanced RLC entity and RNC entity for WCDMA and system thereof |
US20090257407A1 (en) * | 2006-02-07 | 2009-10-15 | Sung-Jun Park | Preamble retransmission method in mobile communications system |
US20110032891A1 (en) * | 2006-02-07 | 2011-02-10 | Young Dae Lee | Method for transmitting response information in mobile communications system |
US10045381B2 (en) | 2006-02-07 | 2018-08-07 | Lg Electronics Inc. | Method for transmitting response information in mobile communications system |
US8243665B2 (en) | 2006-02-07 | 2012-08-14 | Lg Electronics Inc. | Method for selection and signaling of downlink and uplink bandwidth in wireless networks |
US20090116449A1 (en) * | 2006-02-08 | 2009-05-07 | Ntt Docomo, Inc. | Channel transmission method and base station |
US8971288B2 (en) | 2006-03-22 | 2015-03-03 | Lg Electronics Inc. | Method of supporting handover in a wireless communication system |
US20070253360A1 (en) * | 2006-05-01 | 2007-11-01 | Rehan Jalil | Method and system for communicating a plurality of packets in multicast broadcast service (mbs) communication network |
US9019888B2 (en) * | 2006-05-01 | 2015-04-28 | Wichorus Inc. | Method and system for communicating a plurality of packets in multicast broadcast service (MBS) communication network |
US7848287B2 (en) * | 2006-05-16 | 2010-12-07 | Telefonaktiebolaget Lm Ericsson | Bi-directional RLC non-persistent mode for low delay services |
US20070268861A1 (en) * | 2006-05-16 | 2007-11-22 | Diachina John W | Bi-Directional RLC Non-Persistent Mode for Low Delay Services |
US8189537B2 (en) | 2006-06-21 | 2012-05-29 | Lg Electronics Inc. | Method for reconfiguring radio link in wireless communication system |
US8638707B2 (en) | 2006-06-21 | 2014-01-28 | Lg Electronics Inc. | Method for supporting quality of multimedia broadcast multicast service (MBMS) in mobile communications system and terminal thereof |
US20090005095A1 (en) * | 2006-06-21 | 2009-01-01 | Sung Duck Chun | Method for Reconfiguring Radio Link in Wireless Communication System |
US9220093B2 (en) | 2006-06-21 | 2015-12-22 | Lg Electronics Inc. | Method of supporting data retransmission in a mobile communication system |
US8234534B2 (en) | 2006-06-21 | 2012-07-31 | Lg Electronics Inc. | Method of supporting data retransmission in a mobile communication system |
US8570956B2 (en) | 2006-06-21 | 2013-10-29 | Lg Electronics Inc. | Method of communicating data in a wireless mobile communications system using message separation and mobile terminal for use with the same |
US8248924B2 (en) | 2006-06-21 | 2012-08-21 | Lg Electronics Inc. | Uplink access method of mobile communication system |
US8429478B2 (en) | 2006-06-21 | 2013-04-23 | Lg Electronics Inc. | Method of supporting data retransmission in a mobile communication system |
WO2008004080A2 (en) * | 2006-06-30 | 2008-01-10 | Nokia Corporation | Macrodiversity arrangement for a multicast service on a high-speed transport channel |
US20080070606A1 (en) * | 2006-06-30 | 2008-03-20 | Kari Rikkinen | Apparatus, method, system and software product involving a macrodiversity arrangement for a multicast service on a high speed transport channel |
WO2008004080A3 (en) * | 2006-06-30 | 2008-04-24 | Nokia Corp | Macrodiversity arrangement for a multicast service on a high-speed transport channel |
US20140362759A1 (en) * | 2006-08-21 | 2014-12-11 | Interdigital Technology Corporation | Multi-cell coordination for multimedia broadcast multicast services in a wireless communication system |
CN106102020A (en) * | 2006-08-21 | 2016-11-09 | 交互数字技术公司 | The access gateway in SFN, multiple e node B being controlled |
US20080045224A1 (en) * | 2006-08-21 | 2008-02-21 | Interdigital Technology Corporation | Multi-cell coordination for multimedia broadcast multicast services in a wireless communication system |
WO2008024214A2 (en) * | 2006-08-21 | 2008-02-28 | Interdigital Technology Corporation | Multi-cell coordination for multimedia broadcast multicast services in a wireless communication system |
US9780958B2 (en) * | 2006-08-21 | 2017-10-03 | Interdigital Technology Corporation | Multi-cell coordination for multimedia broadcast multicast services in a wireless communication system |
US8843118B2 (en) | 2006-08-21 | 2014-09-23 | Interdigital Technology Corporation | Multi-cell coordination for multimedia broadcast multicast services in a wireless communication system |
WO2008024214A3 (en) * | 2006-08-21 | 2009-04-30 | Interdigital Tech Corp | Multi-cell coordination for multimedia broadcast multicast services in a wireless communication system |
EP2621232A1 (en) * | 2006-08-21 | 2013-07-31 | InterDigital Technology Corporation | Multi-cell coordination for multimedia broadcast muliticast services in a wireless communication system. |
EP2068523A1 (en) * | 2006-08-22 | 2009-06-10 | Alcatel Shanghai Bell Co., Ltd. | Gateway device, base station device, communication network and synchronization method |
EP2068523A4 (en) * | 2006-08-22 | 2013-12-11 | Alcatel Shanghai Bell Co Ltd | Gateway device, base station device, communication network and synchronization method |
EP2068465A1 (en) * | 2006-09-26 | 2009-06-10 | Mitsubishi Electric Corporation | Data communication method and mobile communication system |
EP2068465A4 (en) * | 2006-09-26 | 2012-04-04 | Mitsubishi Electric Corp | Data communication method and mobile communication system |
US20100074159A1 (en) * | 2006-09-26 | 2010-03-25 | Shohei Yamada | Position managing device, mobile station device, base station device, frequency layer control method, program, and recording medium |
EP2822195A1 (en) * | 2006-09-26 | 2015-01-07 | Mitsubishi Electric Corporation | Data communication method and mobile communication system |
US9930639B2 (en) | 2006-09-26 | 2018-03-27 | Tcl Communication Technology Holdings Limited | Data communication method and mobile communication system |
US9445322B2 (en) | 2006-09-26 | 2016-09-13 | Tcl Communication Technology Holdings Limited | Data communication method and mobile communication system |
US20110090836A1 (en) * | 2006-09-26 | 2011-04-21 | Mitsubishi Electric Corporation | Data communication method and mobile communication system |
US9167423B2 (en) * | 2006-09-29 | 2015-10-20 | Rosemount Inc. | Wireless handheld configuration device for a securable wireless self-organizing mesh network |
US20080082698A1 (en) * | 2006-09-29 | 2008-04-03 | Rosemount, Inc. | Wireless handheld configuration device for a securable wireless self-organizing mesh network |
US20080089398A1 (en) * | 2006-10-12 | 2008-04-17 | Cormier Daniel R | Determining a mode to transmit data |
US8019018B2 (en) | 2006-10-12 | 2011-09-13 | Powerwave Cognition, Inc. | Determining a mode to transmit data |
US20080089265A1 (en) * | 2006-10-15 | 2008-04-17 | Samsung Electronics Co., Ltd. | System and method for transmitting/receiving multicast/broadcast signal in a communication system |
US8194578B2 (en) | 2006-10-15 | 2012-06-05 | Samsung Electronics Co., Ltd. | System and method for transmitting/receiving multicast/broadcast signal in a communication system |
US8135043B2 (en) * | 2006-10-25 | 2012-03-13 | Nec Corporation | Mobile communication system, core network apparatus, and MBMS data transmission method used for the same |
US20080101282A1 (en) * | 2006-10-25 | 2008-05-01 | Nce Corporation | Mobile communication system, core network apparatus, and mbms data transmission method used for the same |
WO2008052958A3 (en) * | 2006-10-31 | 2008-07-03 | Alcatel Lucent | A method for synchronising the delivery of broadcast data in a single frequency mobile communication network |
US8160040B2 (en) * | 2006-10-31 | 2012-04-17 | Nokia Siemens Networks Gmbh & Co. Kg | Scheduling of measurement occasions of a mobile terminal |
WO2008052958A2 (en) * | 2006-10-31 | 2008-05-08 | Alcatel Lucent | A method for synchronising the delivery of broadcast data in a single frequency mobile communication network |
EP1919235A1 (en) * | 2006-10-31 | 2008-05-07 | Alcatel Lucent | A method for synchronising the delivery of broadcast data in a single frequency mobile communication network |
US20080101334A1 (en) * | 2006-10-31 | 2008-05-01 | Alcatel Lucent | Method for distribution of data packets in a single frequency mobile communication network, an access network node, a base station and a single frequency mobile communication network therefor |
US20100118713A1 (en) * | 2006-10-31 | 2010-05-13 | Volker Breuer | Scheduling of measurement occasions of a mobile terminal |
US8005085B2 (en) | 2006-10-31 | 2011-08-23 | Alcatel Lucent | Method for distribution of data packets in a single frequency mobile communication network, an access network node, a base station and a single frequency mobile communication network therefor |
US20080112427A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Autonomous dynamic spectrum access |
US20080112341A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Method and system for using selected bearer channels |
WO2008127421A3 (en) * | 2006-11-10 | 2009-03-26 | Powerwave Cognition Inc | Scheduling for autonomous dynamic spectrum access systems |
US8208873B2 (en) | 2006-11-10 | 2012-06-26 | Powerwave Cognition, Inc. | Method and apparatus for adjusting waveform parameters for an adaptive air interface waveform |
US7787426B2 (en) | 2006-11-10 | 2010-08-31 | Powerwave Cognition, Inc. | Adaptive control channel initialization operations for autonomous dynamic spectrum access systems |
US8718555B2 (en) | 2006-11-10 | 2014-05-06 | Powerwave Cognition, Inc. | Method and system for using selected bearer channels |
US8014783B2 (en) | 2006-11-10 | 2011-09-06 | Powerwave Cognition, Inc. | Bearer selection and negotiation in autonomous dynamic spectrum access systems |
US8155127B2 (en) | 2006-11-10 | 2012-04-10 | Powerwave Cognition, Inc. | Autonomous dynamic spectrum access |
US20080112426A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Adaptive control channel initialization operations for autonomous dynamic spectrum access systems |
US20080113624A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Method and apparatus for adjusting waveform parameters for an adaptive air interface waveform |
US20080112428A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Scheduling for autonomous dynamic spectrum access systems |
US20080113667A1 (en) * | 2006-11-10 | 2008-05-15 | Seidel Scott Y | Bearer selection and negotiation in autonomous dynamic spectrum access systems |
WO2008069418A1 (en) * | 2006-12-07 | 2008-06-12 | Electronics And Telecommunications Research Institute | Method for providing multicast broadcast service in communication system |
US8159986B2 (en) | 2006-12-07 | 2012-04-17 | Samsung Electronics Co., Ltd. | Method for providing multicast broadcast service in communication system |
US20100061288A1 (en) * | 2006-12-07 | 2010-03-11 | Electronics And Telecommunications Research Institute | Method for providing multicast broadcast service in communication system |
KR100774365B1 (en) | 2006-12-07 | 2007-11-08 | 한국전자통신연구원 | Method for providing multicast broadcast service in communication system |
KR100876500B1 (en) | 2007-01-17 | 2008-12-31 | 한국정보통신대학교 산학협력단 | WiBro channel allocation method for real time broadcasting service |
US9385844B2 (en) | 2007-05-30 | 2016-07-05 | Qualcomm Incorporated | Method and apparatus for sending scheduling information for broadcast and multicast services in a cellular communication system |
US8670363B2 (en) * | 2007-05-30 | 2014-03-11 | Qualcomm Incorporated | Method and apparatus for sending scheduling information for broadcast and multicast services in a cellular communication system |
US20090046617A1 (en) * | 2007-05-30 | 2009-02-19 | Qualcomm Incorporated | Method and apparatus for sending scheduling information for broadcast and multicast services in a cellular communication system |
EP2012482A3 (en) * | 2007-07-05 | 2011-05-18 | China Mobile Communications Corporation | Methods and related apparatus for transmitting and receiving resource scheduling information and scheduling resources |
EP2012482A2 (en) | 2007-07-05 | 2009-01-07 | China Mobile Communications Corporation | Methods and related apparatus for transmitting and receiving resource scheduling information and scheduling resources |
US20090010181A1 (en) * | 2007-07-05 | 2009-01-08 | China Mobile Communications Corporation | Method and apparatus for transmitting and receiving the configuration mode of service carrier frequency time slots |
US8050210B2 (en) * | 2007-07-05 | 2011-11-01 | China Mobile Communications Corporation | Method and apparatus for transmitting and receiving the configuration mode of service carrier frequency time slots |
US8755321B2 (en) * | 2007-07-23 | 2014-06-17 | China Academy Of Telecommunications Technology | Method and apparatus for transmitting and receiving multimedia broadcast multicast services |
US20100265857A1 (en) * | 2007-07-23 | 2010-10-21 | Xuelong Wang | Method and apparatus for transmitting and receiving multimedia broadcast multicast services |
US20090047942A1 (en) * | 2007-08-13 | 2009-02-19 | Qualcomm Incorporated | Method and apparatus for supporting broadcast and multicast services in a wireless communication system |
US9386557B2 (en) | 2007-08-13 | 2016-07-05 | Qualcomm Incorporated | Method and apparatus for supporting broadcast and multicast services in a wireless communication system |
US20100260056A1 (en) * | 2007-10-24 | 2010-10-14 | Kenichi Takai | Mobile Communication System, Common Channel Transmission Control Device, and Common Channel Transmission Control Method Used in the System and Device |
US8619660B2 (en) * | 2007-10-24 | 2013-12-31 | Nec Corporation | Mobile communication system, common channel transmission control device, and common channel transmission control method used in the system and device |
WO2009084931A1 (en) * | 2007-12-17 | 2009-07-09 | Lg Electronics Inc. | Method for obtaining synchronization signal in wireless communication system |
US20090168681A1 (en) * | 2008-01-02 | 2009-07-02 | Billy Gayle Moon | Mechanism for wireless multicast |
WO2009088900A1 (en) * | 2008-01-02 | 2009-07-16 | Cisco Technology, Inc. | Mechanism for wireless multicast |
US8295219B2 (en) | 2008-01-02 | 2012-10-23 | Cisco Technology, Inc. | Mechanism for wireless multicast |
US8625526B2 (en) | 2008-01-03 | 2014-01-07 | Lg Electronics Inc. | Method for obtaining synchronization signal in wireless communication system |
US20090259909A1 (en) * | 2008-04-15 | 2009-10-15 | Qualcomm Incorporated | Physical harq indicator channel (phich) resource assignment signaling in a wireless communication environment |
US8522101B2 (en) * | 2008-04-15 | 2013-08-27 | Qualcomm Incorporated | Physical HARQ indicator channel (PHICH) resource assignment signaling in a wireless communication environment |
EP2278831A1 (en) * | 2008-04-30 | 2011-01-26 | ZTE Corporation | Synchronization method of common control message among network elements |
EP2278831A4 (en) * | 2008-04-30 | 2014-03-05 | Zte Corp | Synchronization method of common control message among network elements |
US20110128948A1 (en) * | 2008-06-11 | 2011-06-02 | Lg Electronics Inc. | Apparatus and method for transmitting and receiving data |
US20110116429A1 (en) * | 2008-06-11 | 2011-05-19 | Lg Electronics Inc. | Apparatus for controlling power of wireless device and method thereof |
US8605634B2 (en) | 2008-06-11 | 2013-12-10 | Lg Electronics Inc. | Apparatus for controlling power of wireless device and method thereof |
US20100039979A1 (en) * | 2008-08-13 | 2010-02-18 | Fujitsu Limited | Broadcast and multicast service communication method, base station, and mobile station |
US9775133B2 (en) | 2008-08-13 | 2017-09-26 | Fujitsu Limited | Broadcast and multicast service communication method, base station, and mobile station |
US8909234B2 (en) * | 2008-09-11 | 2014-12-09 | Samsung Electronics Co., Ltd. | Data communication network and data communication method using transmission of soft-decision information |
US20100062775A1 (en) * | 2008-09-11 | 2010-03-11 | Hwang Chan Soo | Data communication network and data communication method using transmission of soft-decision information |
KR101466907B1 (en) * | 2008-09-11 | 2014-12-01 | 삼성전자주식회사 | Data commnunication network using transmission of soft decision information and data commnunication method using the same |
US8599754B2 (en) * | 2008-09-18 | 2013-12-03 | Huawei Technologies Co., Ltd. | Method, device, and system for configuring multicast broadcast single frequency network resources |
US20110199973A1 (en) * | 2008-09-18 | 2011-08-18 | Huawei Technologies Co., Ltd. | Method, device, and system for configuring multicast broadcast single frequency network resources |
US20110182200A1 (en) * | 2008-09-22 | 2011-07-28 | Huawei Technologies Co., Ltd. | Method, Device and User Equipment for Transmitting Multi-Cell Scheduling Information |
EP2326119A4 (en) * | 2008-09-22 | 2012-08-22 | Huawei Tech Co Ltd | Method, device and user equipment for transmitting multi-cell scheduling information |
KR101260753B1 (en) * | 2008-09-22 | 2013-05-06 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Method, device and user equipment for transmitting multi-cell scheduling information |
EP2683194A3 (en) * | 2008-09-22 | 2014-07-09 | Huawei Technologies Co., Ltd. | Method, device and user equipment for transmitting multi-cell scheduling information |
US8861387B2 (en) | 2008-09-22 | 2014-10-14 | Huawei Technologies Co., Ltd. | Method, device and user equipment for transmitting multi-cell scheduling information |
US9571245B2 (en) | 2008-09-22 | 2017-02-14 | Huawei Technologies Co., Ltd. | Method, device and user equipment for transmitting multi-cell scheduling information |
EP2326119A1 (en) * | 2008-09-22 | 2011-05-25 | Huawei Technologies Co., Ltd. | Method, device and user equipment for transmitting multi-cell scheduling information |
RU2508613C2 (en) * | 2008-11-12 | 2014-02-27 | Зет-Ти-И Корпорейшн | Synchronisation scheduling method and apparatus |
US20110216787A1 (en) * | 2008-11-12 | 2011-09-08 | Jianxun Ai | Method and apparatus of synchronization scheduling |
US8654757B2 (en) * | 2008-11-12 | 2014-02-18 | Zte Corporation | Method and apparatus of synchronization scheduling |
US20110206019A1 (en) * | 2008-11-13 | 2011-08-25 | Hengxing Zhai | Synchronization Scheduling Method |
WO2010054547A1 (en) * | 2008-11-13 | 2010-05-20 | 中兴通讯股份有限公司 | Synchronization scheduling method |
EP2357770A1 (en) * | 2008-11-13 | 2011-08-17 | ZTE Corporation | Synchronization scheduling method |
EP2357770A4 (en) * | 2008-11-13 | 2013-12-04 | Zte Corp | Synchronization scheduling method |
US8509183B2 (en) * | 2008-12-19 | 2013-08-13 | Electronics And Telecommunications Research Institute | Method for evolved multimedia broadcast/multicast service |
US20100159933A1 (en) * | 2008-12-19 | 2010-06-24 | Electronics And Telecommunications Research Institute | Method for evolved multimedia broadcast/multicast service |
US20130250839A1 (en) * | 2009-04-21 | 2013-09-26 | Electronics And Telecommunications Research Institute | Method and device for acquiring synchronization between nodes and method for organizing multiple physical channels |
EP2254257A1 (en) * | 2009-05-19 | 2010-11-24 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Method and processing unit for processing signals with macro diversity |
WO2010133494A1 (en) * | 2009-05-19 | 2010-11-25 | Telefonaktiebolaget L M Ericsson (Publ) | Method and processing unit for processing signals with macro diversity |
US9094938B2 (en) | 2009-08-25 | 2015-07-28 | Zte Corporation | Method and system for transmitting dynamic scheduling information |
US20110141962A1 (en) * | 2009-12-15 | 2011-06-16 | Electronics And Telecommunications Research Institute | Method and apparatus for demodulating multicast signal |
WO2012016205A1 (en) * | 2010-07-30 | 2012-02-02 | Qualcomm Incorporated | Method and apparatus for improved mbms capacity and link management through robust and performance optimal soft combining |
KR101434848B1 (en) | 2010-07-30 | 2014-08-27 | 퀄컴 인코포레이티드 | Method and apparatus for improved mbms capacity and link management through robust and performance optimal soft combining |
US8456996B2 (en) | 2010-07-30 | 2013-06-04 | Qualcomm Incorporated | Method and apparatus for improved MBMS capacity and link management through robust and performance optimal soft combining |
US11510202B2 (en) | 2010-09-28 | 2022-11-22 | Neo Wireless Llc | Methods and apparatus for flexible use of frequency bands |
US11510201B2 (en) | 2010-09-28 | 2022-11-22 | Neo Wireless Llc | Methods and apparatus for flexible use of frequency bands |
US11985646B2 (en) | 2010-09-28 | 2024-05-14 | Neo Wireless Llc | Methods and apparatus for flexible use of frequency bands |
US11483832B1 (en) | 2010-09-28 | 2022-10-25 | Neo Wireless Llc | Methods and apparatus for flexible use of frequency bands |
US9559884B2 (en) * | 2011-02-07 | 2017-01-31 | Intel Corporation | Co-phasing of transmissions from multiple infrastructure nodes |
US20130288728A1 (en) * | 2011-02-07 | 2013-10-31 | Alexei Davydov | Co-phasing of transmissions from multiple infrastructure nodes |
US20130064164A1 (en) * | 2011-09-09 | 2013-03-14 | Electronics And Telecommunications Research Institute | Method and apparatus for managing multicast service |
US11228456B2 (en) * | 2011-10-11 | 2022-01-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Technique for delivering schedule information for an MBMS user service |
US10659245B2 (en) * | 2011-10-11 | 2020-05-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Technique for delivering schedule information for an MBMS user service |
US9503995B2 (en) * | 2011-12-20 | 2016-11-22 | Zte Corporation | Method and system for synchronous service-flow transmission in heterogeneous network |
US20140293951A1 (en) * | 2011-12-20 | 2014-10-02 | Zte Corporation | Method and system for synchronous service-flow transmission in heterogeneous network |
CN103179656A (en) * | 2011-12-20 | 2013-06-26 | 中兴通讯股份有限公司 | Method and system for transmitting business flow synchronously in heterogeneous network |
EP2744280A4 (en) * | 2011-12-20 | 2015-06-03 | Zte Corp | Method and system for synchronous service flow transmission in heterogeneous network |
US20140325580A1 (en) * | 2013-04-24 | 2014-10-30 | Telefonaktiebolaget L M Ericsson (Publ) | File Scheduling in BM-SC |
US9277372B2 (en) * | 2013-04-24 | 2016-03-01 | Telefonaktiebolaget L M Ericsson (Publ) | File scheduling in BM-SC |
US9226266B2 (en) | 2013-09-03 | 2015-12-29 | Telefonaktiebolaget L M Ericsson (Publ) | Method for determining delay parameters for user data flow synchronization for eMBMS |
US9986560B2 (en) * | 2013-11-27 | 2018-05-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for allocation of time transmission intervals |
US20170026963A1 (en) * | 2013-11-27 | 2017-01-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for Allocation of Time Transmission Intervals |
US10327111B2 (en) * | 2014-10-30 | 2019-06-18 | Lg Electronics Inc. | MBMS operation method performed by terminal in wireless communication system and terminal using same |
CN109156021A (en) * | 2016-05-20 | 2019-01-04 | 瑞典爱立信有限公司 | Method and apparatus in wireless communication system for robustness enhancing |
WO2017197634A1 (en) | 2016-05-20 | 2017-11-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for robustness enhancement in a wireless communication system |
US10574400B2 (en) | 2016-05-20 | 2020-02-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for robustness enhancement in a wireless communication system |
EP3459311A4 (en) * | 2016-05-20 | 2020-01-01 | Telefonaktiebolaget LM Ericsson (publ) | Methods and devices for robustness enhancement in a wireless communication system |
Also Published As
Publication number | Publication date |
---|---|
US20080205322A1 (en) | 2008-08-28 |
US8638706B2 (en) | 2014-01-28 |
WO2006074355A3 (en) | 2006-10-19 |
JP2007525914A (en) | 2007-09-06 |
JP4617352B2 (en) | 2011-01-26 |
WO2006074355A2 (en) | 2006-07-13 |
EP1836787A4 (en) | 2009-11-11 |
EP1836787A2 (en) | 2007-09-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8638706B2 (en) | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service | |
US7499435B2 (en) | Partial combining method and apparatus for multimedia broadcast/multicast service | |
US8948072B2 (en) | Method for providing a plurality of services | |
JP3926287B2 (en) | Soft handover method for multicast multimedia broadcasting service in code division multiple access mobile communication system | |
CN100583693C (en) | Method and system for realizing empty port synchronous emitting data | |
US8891426B2 (en) | Methods and apparatuses relating to multimedia broadcast multicast services | |
US8310972B2 (en) | Mobile wireless communication system, access gateway, wireless base station, and mobile wireless communication control method | |
JP5184698B2 (en) | Method for synchronizing common control messages between network elements | |
EP2262182B1 (en) | Method for synchronizing a gateway and base stations and the corresponding gateway and base station | |
EP1759472B1 (en) | Method for controlling data transmission | |
US20060252439A1 (en) | Method and apparatus for controlling access to a multimedia broadcast multicast service in a packet data communication system | |
US20090116433A1 (en) | Data transmitting system, communication node and data transmitting method | |
JP5199310B2 (en) | Method and apparatus for processing MBMS dynamic scheduling information | |
EP2797369B1 (en) | File scheduling in BM-SC | |
CN1943138A (en) | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service | |
CN101651488A (en) | Synergistic method for element locations of multimedia broadcast multicasting services | |
KR20080047947A (en) | Method for performing cell selection in mobile telecommunication system and therefor system | |
AU2012201114B2 (en) | A method for providing a plurality of services |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MOTOROLA, INC., ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CAI, ZHIJUN;HARRISON, ROBERT M.;REEL/FRAME:017549/0192 Effective date: 20060206 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: MOTOROLA SOLUTIONS, INC., ILLINOIS Free format text: CHANGE OF NAME;ASSIGNOR:MOTOROLA, INC.;REEL/FRAME:030106/0376 Effective date: 20110104 Owner name: MOTOROLA MOBILITY LLC, ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOTOROLA SOLUTIONS, INC.;REEL/FRAME:030106/0573 Effective date: 20130315 |