703 results about "Single-frequency network" patented technology

The invention concerns a method for coordination of the interference in the uplink between cells (B1, B2) of a single frequency network with the frequency band used for uplink being subdivided into at least two subsets (F1 F2 . . . FR), whereby a resource related to a dedicated subset is allocated to a mobile terminal (T1) located in a first cell (B1) of said cells in the border area to a neighbor cell (B2-B4), the base station of the cell (B2) with the highest interference damage caused by the mobile terminal (T1) accepts a high interference level on said dedicated subset dependent on network criteria, and the usage of said dedicated subset in the cell (B2) with the highest interference damage caused by the mobile terminal (T1) is restricted under observation of the interference level, a base station, a mobile terminal and a mobile network therefor.

Provided is a system and method for terrestrial digital broadcasting service using a single frequency network without additional equipment. The system and method synchronizes input signals into transmitting stations by inserting a transmission synchronization signal into a header of TS periodically, and solves the problematic ambiguity of the trellis encoder by including a trellis encoder switching unit separately and initializing a memory of the trellis encoder. The terrestrial digital broadcasting system includes: a broadcasting station for multiplexing video, voice and additional signals into transport stream (TS) and transmitting the TS to the transmitting stations and a transmitting stations for receiving the TS and broadcast the TS to receiving stations through a single frequency network

A satellite system employing time diversity and a single frequency network of terrestrial re-radiation stations is provided wherein each terrestrial re-radiation station inserts a delay into a terrestrial signal. The delay allows the time of arrival of the early time diversity signal at the center of terrestrial coverage to coincide with the arrival of the corresponding late time diversity signal, thereby improving hand-off between terrestrial and satellite signals at a receiver. The delay also adjusts for distance differences between each terrestrial re-radiation station and the satellite and between each station and the center of the terrestrial coverage region. This adjustment optimizes the TDM-MCM reception by synchronizing at the center of the SFN the phase of the MCM signals re-radiated from the re-radiating stations of the SFN. The delay also compensates for the processing delay encountered when converting a satellite LOS TDM stream into a multicarrier modulated stream for transporting the satellite LOS TDM stream to user receivers and for the diversity delay between the early and late signals.

The invention concerns a method for coordination of the interference in the uplink between cells (C1,C6) of a single frequency network with the frequency band used for uplink being subdivided into at least two subsets (F1, F2 . . . FR), whereby a dedicated subset (F1) of said at least two subsets (F1, F2 . . . FR) is selected to be burdened more by inter-cell interference and is allocated under observation of the strong inter-cell interference in this dedicated subset to mobile terminals located in a first cell (C1), and mobile terminals (T2) located in the border area of a second cell (C6) of said cells neighbored to the first cell and causing the strongest interference in said first cell (C1) are based on further network criteria tried to be scheduled to said dedicated subset (F1), a base station, a mobile terminal and a mobile network therefor.

A method of allocating resource elements in an orthogonal frequency division multiplexing (OFDM) system for transmission of a channel state information reference signal (CSI-RS) is disclosed. The method includes converting resource elements to a two-dimensional frequency-time domain. The converted resource elements can then be partitioned to units of a physical resource block (PRB), which can be one subframe, for example. It can be determined whether a portion of a PRB is being used by another signal; and if the portion of the PRB is not being used, it can be allocated for transmission of the CSI-RS. The CSI-RS can be transmitted at resource element locations determined by the resource elements available to the CSI-RS in a regular or a frequency-division duplexing (FDD) downlink subframe, for example. The CSI-RS can be transmitted in a downlink subframe configured as a Multi-Media Broadcast over a Single Frequency Network (MBSFN) or a non-MBSFN subframe.

A single frequency network (SFN) system is provided, where the system includes a head-end and a plurality of transmitters. The head-end is capable of calculating timing information based upon a time reference having a second resolution. Thereafter, the head-end is capable of sending content including the timing information. The transmitters are capable of receiving the content including the timing information. At least one transmitter is capable of calculating a delay to synchronize the content with content received by at least one other transmitter. In this regard, the transmitter(s) are capable of calculating the delay based upon the timing information and a time reference having a first resolution, the first resolution being higher than the second resolution such that the delay has a higher accuracy than the timing information. After the delay, then, the transmitter(s) are capable of broadcasting the synchronized content to a plurality of mobile terminals.

A method and an apparatus for receiving data in a User Equipment (UE) supporting a Multimedia Broadcast Multicast Service (MBMS) are provided. A method of receiving data by a UE which supports an MBMS includes obtaining first indication information indicating a Multicast / Broadcast over a Single Frequency Network (MBSFN) subframe reserved for an MBSFN, obtaining second indication information indicating a subframe in the MBSFN subframe, the subframe decoding a Physical Multicast CHannel (PMCH), and when although a first subframe is indicated as the MBSFN subframe, the first subframe is not indicated to decode a PMCH and is not of a subframe for a Positioning Reference Signal (PRS), receiving a Physical Downlink Control CHannel (PDCCH) of the first subframe and decoding a corresponding Physical Downlink Shared CHannel (PDSCH).

The present invention relates to communicating between a network and a mobile terminal in a wireless communication system. The invention includes receiving a message from the network for announcing a service. The message includes an attribute for identifying whether the service is to be received according to a specific mode. The specific mode is a mode wherein information is communicated on a frequency having no associated uplink service. The attribute is included in the message according to a session description protocol describing the service.

A method and apparatus of transmitting data in a Multimedia Broadcast multicast service Single Frequency Network (MBSFN) subframe in a wireless communication system is provided. A base station (BS) transmits a physical downlink control channel (PDCCH) to a user equipment in a first orthogonal frequency division multiplexing (OFDM) symbol, transmits reference signals for a plurality of extended antenna ports to the user equipment in a second OFDM symbol by mapping the reference signals to subcarriers, and transmits a physical downlink shared channel (PDSCH) to the user equipment in the second OFDM symbol by mapping the PDSCH to the remaining subcarriers other than the subcarriers to which the reference signals are mapped.

The system comprises three parts: adapter in single frequency network, GPS receiver, and modulator of supporting ground digital TV broadcasting in single frequency network. At central transmitting terminal, the adapter inserts MIP packets in transmission code stream. MIP packet carries synchronizing time label relevant to GPS receiver and system maximal time delay to each relay station etc. In each relay station, synchronization system detects M1P packets, reading out time label and maximal time delay, measuring time delay of received signal, calculating out additional time delay. According to the additional time delay, TS flow is delayed properly in order to make signal synchronization again among relay stations. The disclosed scheme is realized through FPGA, and is applied to ground digital multiple media broadcasting transmission system forwaded by Tsinghua Univ. Favorable effect is obtained through actual try.

A cell measurement method of a User Equipment (UE) is disclosed. The cell measurement method may include receiving a radio resource configuration dedicated Information Element (IE) and a measurement object from a serving cell. The radio resource configuration dedicated IE may include first information about a measurement resource restriction pattern for a first cell and the measurement object may include a neighbor cell configuration IE for indicating MBMS Single Frequency Network (MBSFN) configurations of one or more neighbor cells. The measurement object may further include second information about a resource restriction pattern indicating subframes on which restriction is imposed in Reference Signal Received Power (RSRP) or Reference Signal Received Quality (RSRQ) measurements of one or more neighbor cells and a list of one or more neighbor cells to which the second information is applied. If the MBSFN configurations of the one or more neighbor cells are not known or not explicitly indicated by the neighbor cell configuration IE, the method may further include determining that the subframes indicated by the second information have not been configured as MBSFN subframes for the one or more neighbor cells listed in the list.

A method to control a multimedia broadcast multicast service (MBMS) mode of a MBMS session in a communication system is provided herein. In operation, a first network element that is located outside a radio access network determines to use one of a single frequency network MBMS mode and a single cell MBMS mode for the MBMS session based on a property of the MBMS session. The first network element then transmits a session control signaling message to a second network element that is located inside the radio access network. The session control signaling message instructs the second network element that user plane data for the MBMS session shall be transmitted using the determined MBMS mode. The base stations then transmit the user plane data to one or user equipments in a target service area according to the determined MBMS mode.

A method of handling mobility in multimedia broadcast multicast service single frequency network (MBSFN) for a user equipment of a wireless communication system includes when the user equipment proceeds with an MBMS service and performs handover from a source cell to a target cell, checking whether a target MBSFN area which the target cell belongs to is the same as a source MBSFN area which the source cell belongs to, when the target MBSFN area is different from the source MBSFN area, receiving a multicast control channel (MCCH) corresponding to the target MBSFN area, checking whether the MBMS service is provided in the target MBSFN area, and when the MBMS service is provided in the target MBSFN area, sending a service join request to a target network of the wireless communication system, for continuing to receive the MBMS service.

A method for providing a single-frequency network (SFN) service between a base station (BS) and a mobile station (MS) in a wireless communication system. The BS sets a first segment indicator in a medium access control (MAC) message field before transmission, if a resource allocation scheme corresponds to general data transmission. The BS sets a second segment indicator in the MAC message before transmission, if the resource allocation scheme corresponds to single frequency-based data transmission. The MS receives the MAC message from the BS, and performs renumbering according to the first segment indicator or the second segment indicator included in the received MAC message.

A universal broadband broadcasting service is provided. A spectrum-sharing database stores attributes associated with a shared spectrum, a policy controller controls access to the shared spectrum by broadcast service entities, and a gateway receives IP multicast traffic from the broadcast service entities and communicates the IP multicast traffic to a broadcast single frequency network.

A system, method, apparatus and computer code are provided for producing coherent symbols from digital RF transmitters. A receiver receives a first initialization packet containing a plurality of stuff bytes and Trellis coders are deterministically initialized using the first initialization packet.

The present invention discloses a method and a system for obtaining downlink control information in MBSFN sub-frame, wherein the method comprises the steps that: a base station transmits downlink control information to user equipment (UE) according to a determined downlink transmission mode; the UE obtains the downlink control information according to a corresponding downlink control information format in the determined downlink transmission mode on (single-frequency network multicast / broadcast) MB SFN sub-frame. In the present invention, solving method is provided aiming at the problems that how the MB SFN sub-frame in LTE-Advance version R10 obtains the downlink control information, so as to perform PDSCH demodulation, and how the downlink transmission mode is configured. The downlink control information in the MB SFN sub-frame is obtained in the LTE-Advance system, so that the demodulation of PDSCH in special MB SFN sub-frame of LTE-A UE of LTE-Advance system is realized.

A method of handling multimedia broadcast and multicast service (MBMS) transmission and reception for a mobile device in a wireless communication system is disclosed. The method includes enabling a plurality of component carriers, and applying a multi-media broadcast over a single frequency network (MBSFN) allocation on a first enabled component carrier and not on the rest of the enabled component carriers when the mobile device receives the MBSFN allocation on the first enabled component carrier.

The invention concerns a method for coordination of the interference in the uplink between cells (B1,B2) of a single frequency network with the frequency band used for uplink being subdivided into at least two subsets(F1 F2. . . FR), whereby a resource related to a dedicated subset is allocated to a mobile terminal (T1) located in a first cell (B1) of said cells in the border area to a neighbor cell (B2-B4), the based station of the cell (B2) with the highest interference damage caused by the mobile terminal (T1) accepts a high interference level on said dedicated subset dependent on network criteria, and the usage of said dedicated subset in the cell (B2) with the highest interference damage caused by the mobile terminal (T1) is restricted under observation of the interference level, a base station, a mobile terminal and a mobile network therefor.

A system and method for signaling the availability of a Multimedia Broadcast / Multicast Service (MBMS) user service in multiple variants. Various embodiments involve the usage of the additional capacity introduced by MBMS Over a Single Frequency Network (MBSFN) in order to carry a higher quality or more robust variant of the service in MBMS. The broadcast multicast service center (BM-SC) provides the same MBMS user service in two variants, one for the regular MBMS and the other for MBSFN. The MBSFN variant of the service may be charged differently and would then need to be protected separately. In various embodiments, the user equipment is informed that the same service is present in different variants and therefore can then select one of the available variants for consumption.

A method for handling Multimedia Broadcast Multicast Service Single Frequency Network (MBSFN) subframe in a network terminal of a wireless communication system includes configuring a plurality of MBSFN subframes in a cell, and scheduling downlink unicast transmission in an unused MBSFN subframe of the plurality of MBSFN subframes for a user equipment which is not receiving any MBMS service.

A system, method, apparatus and computer code are provided for producing coherent symbols from digital RF transmitters. A multiplexer receives a digital signal containing content data to be broadcast from the digital RF transmitters and inserts a first initialization packet into the digital signal, where the initialization packets implicit position in the digital signal will signal data framing in the digital RF transmitters. Where the initialization packet contains stuff bytes for deterministically initializing Trellis coders in the digital RF transmitters. A transport stream emitter transmits the digital signal to the plurality of digital RF transmitters.

An apparatus, method, and system for providing a broadcasting service in a Digital Multimedia Broadcasting (DMB) system with a Single Frequency Network (SFN). Networks of shadow and non-shadow regions can be distinguished in the digital broadcasting system. A conditional access system can be used in the shadow region. A terminal can select a service network. A broadcasting providing server encrypts broadcasting service data, generates private and public keys into which predetermined encryption keys are divided to decrypt the encrypted broadcasting service data, sets at least one broadcasting transmitter for transmitting the private key and / or at least one broadcasting transmitter for transmitting the public key, and provides the encryption keys along with the encrypted broadcasting service data. Broadcasting transmitters transmit the encrypted broadcasting service data received from the broadcasting providing server and the private key using the SFN. At least one of the broadcasting transmitters further transmits the public key.

The invention discloses a sub-frame structure of a Multicast Single Frequency Network as well as a sending method in a mobile broadband system. The invention can avoid waste of resources caused by blank sampling points in the sub-frame of the Multicast Single Frequency Network. Every single sub-frame of the Multicast Single Frequency Network comprises a plurality of OFDM symbols. The method comprises that the following steps: increasing the length of the OFDM symbols circulation and / or adding the suffix of the OFDM symbols circulation while node B structures downstream MBSFN sub-frame, so as to ensure data exist in all samples of the MBSFN sub-frames; the node B sends the well-structured sub-frames of MBSFN to each terminal.

A method and related user device for executing handover between a multimedia broadcast multicast single frequency network (MBSFN) and non-MBSFN regions of a communication network are disclosed. The communication network includes a first community forming the MBSFN region, a second community not forming the MBSFN region and a keeping community between the first and second communities. The keeping community belongs to the MBSFN region, wherein the broadcast keeping community in the keeping community indicates information. The method includes steps as follows: receiving the indicating information of the keeping community so as to learn that the user device in the keeping community; measuring a first signal intensity transmitted based on MBSFN and aiming to a pre-determined business in the keeping community and a second signal intensity transmitted based on a single community; and selecting the first community or the second community as the target community when the difference between the first and second signal intensities is less than a pre-determined threshold value. This invention is capable of providing continuous MBMS service for user under the condition that the user device moves in different communication regions.

Method and apparatus that provide for broadcast multicast services in an ultra mobile broadband network are disclosed. A broadcast transmission structure provides for efficient indexing of subbands reserved for BCMCS. Transmissions on the logical channels are segmented into error control blocks beginning with zero or one MAC packet received by a MAC layer. A transmitting entity appends parameters relating to content change within a next ultraframe at end of every broadcast packet that is not a stuffing packet. A mapping message of multiple Physical Layer groups addresses a single logical channel when SFN (Single Frequency Network) coverage of an associated subband group is different from SFN coverage of the logical channel.

A Next Generation Data Network is described. It leverages the “cloud” for data management, low frequency data computation and analytics. The wireless network is a single frequency network that permits limited non-line of sight operation. The wireless network using packet switched beams, the beams are formed and switched electronically. It utilizes advanced signal processing to compensate for low transmit signal power and multipath reflections that can be frequency or flat fades.

An apparatus for adapting hyper cells in response to changing conditions of a cellular network is disclosed. During operation, the apparatus collects data regarding network conditions of the cellular network. In accordance with the collected network condition data, the apparatus changes an association of a transmit point from a second cell ID of a second hyper cell to a first cell ID of a first hyper cell. Virtual data channels, broadcast common control channel and virtual dedicated control channel, transmit point optimization, UE-centric channel sounding and measurement, and single frequency network synchronization are also disclosed.

The invention discloses a transmitting method and device of a channel status information reference signal and a receiving method and device of the channel status information reference signal. The method comprises the steps of: respectively ensuring a crime scene investigation-remote sensing (CSI-RS)-carried root explorer (RE) in the REs which are included by each permeable reactive barrier (PRB) of a multicast single frequency network (MBSFN) subframe and except the RE which carries a physical downlink control channel (PDCCH), a computer reservation system (CRS) and a data management-remote sensor (DM-RS) aiming at each cell; mapping CSI-RS which needs to be transmitted to the cell into the ensured RE; and transmitting the MBSFN subframe to a plurality of user terminals in each cell. The invention provides a specific technical solution through which a base station transmits the CSI-RS in the MBSFN subframe and the user terminals receive the CSI-RS in the MBSFN subframe.

A method of estimating a channel length (304) in a wireless receiver is disclosed. The receiver receives a signal (122) from a remote transmitter. The receiver selects a plurality (K) of different candidate channel lengths and determines a respective criterion value (402) of the signal for each of the plurality of different candidate channel lengths. The receiver selects a channel length (410) from the plurality of different candidate channel lengths in response to the respective criterion value (404).