100 results about "Macrodiversity" patented technology

A method and system for dynamic soft handoff resource allocation in a wireless communications network includes determining a wireless path characteristic individually for each path of a macro diversity connection between a mobile device and a plurality of wireless sites. Wireless resources are allocated for the macro diversity connection between the mobile device and the wireless sites based on the wireless path characteristic. The wireless path characteristic includes a location-based characteristic, a congestion-based characteristic, a subscriber-based characteristic and / or a performance-based characteristic.

A communication system for communication with mobile stations through a plurality of base stations at macrodiverse locations and with frequency hopping (FH). Two or more adjacent base stations communicate with mobile stations in a region between the adjacent base stations using coordinated orthogonal frequency hopping sequences. The communication system operates with virtual cells formed of physical sectors from adjacent base stations. Where base stations each operate with three sectors, virtual cells use three adjacent sectors of three adjacent base stations, respectively, and the coordinated orthogonal frequency hopping sequences are used for the adjacent sectors of each of the virtual cells. For GSM, the coordinated orthogonal frequency hopping sequences in each virtual cell are defined by a single hopping sequence number (HSN) and a set of mobile allocation index offsets (MAIOs). Fast macrodiversity switching is employed in combination with FH.

A communications system including a plurality of base station transceivers linked by some means over which the base station transceivers communicate, a plurality of mobile transceivers adapted to communicate via the base station transceivers using macrodiversity, and wherein the mobile transceivers are further adapted to control allocation of system resorces to enable communication.

The invention relates to a downlink transmission scheme that supports downlink HARQ operation and macro-diversity that is capable of overcoming the problem of HARQ protocol de-synchronization when using HARQ in the downlink with multiple data transmitting network nodes. In this scheme, a distributed HARQ protocol operation for downlink data transmissions involving multiple network nodes is provided, where only one network node is terminating downlink HARQ protocol operation towards to mobile terminal, i.e. retransmissions of a data packet are sent from a single network node, a single HARQ transmitter, to the mobile terminal. The multiple network nodes send a first transmission of the data packet to the mobile terminal in a single transmission time interval using HARQ. One of the multiple network nodes is designated as the HARQ terminating node that controls / handles all retransmissions of the data packet.

Coherent transmit macro-diversity involves transmitting simultaneous signals from one or more transmitters to one or more wireless receivers. Transmit signals are formed as weighted combinations of the individual information signals for each of the wireless receivers. By properly weighting these receiver-specific signals, the combined signals combine at each receiver to cancel all but the desired information signal for that receiver. This improves reception performance and allows multiple receivers to operate on the same communication channel in the same area if desired. The weighting factors used to form the combined signals are based on propagation path characteristics between each of the transmit antennas and each of the receivers. This information is generally referred organized as a channel estimate matrix and is used to filter the information signals such that they may be combined in the required weighted combinations.

A telecommunications system and a method of operating the same are described in which mobile terminals may communicate with base station transceivers over an air interface, a communication to another user terminal being supported in macrodiversity by radio links between a plurality of base station transceivers and a mobile terminal. The radio links in macrodiversity have a set of common radio link configuration parameters. When a change in the common configuration is necessary, the system transmits a radio link configuration change message to each of the base station transceivers and the mobile terminal and waits before implementation of the radio link configuration change until an acknowledgement has been received from at least one base station transceiver in transmitting communication with the mobile terminal, at least one base station transceiver in receiving communication with the mobile terminal and the mobile terminal.

A broadcast-centric cellular communication system improves broadcast channel performance by exploiting the benefits of macro-diversity in a cellular communication system having a plurality of base stations that transmit signals within a plurality of associated cells. System-specific control information common to all cells is synchronously and simultaneously broadcast from multiple base stations using a broadcast channel that is identical across the entire system. Cell-specific control information is transmitted individually from each base station. Mobile stations use the broadcast information for initial synchronization to the system, and to obtain most relevant system information. After system synchronization, the mobile stations identify the connected cell through a physical layer characteristic, and perform initial access to the system.

In a wireless network, plural downlink signals from plural base stations are transmitted to a terminal. The plural downlink signals all carry the same information to the terminal. The terminal provides feedback on the downlink channels. The feedback provides information on the taps of the channels. The amount of information fed back is constrained. Based on the feedback, transmission parameters of the downlink signals are adjusted. The process of transmitting, providing feedback, and adjusting the parameters continue so that the energy of the downlink signal is enhanced at the terminal location and suppressed elsewhere. Beam forming can be used to further suppress the energy signature at locations other than the terminal location.

A broadcast-centric cellular communication system improves broadcast channel performance by exploiting the benefits of macro-diversity in a cellular communication system having a plurality of base stations that transmit signals within a plurality of associated cells. The system constructs an identical paging signal at the plurality of base stations, and controls the base stations to simultaneously transmit the identical paging signal. A mobile station camps on a paging channel that is common to the plurality of base stations, and listens to paging messages being simultaneously broadcast by the plurality of base stations. The mobile station selects a base station having a suitable signal quality, and transmits to the selected base station, a response to a paging message addressed to the mobile station.

The present invention provides a method for interference cancellation in a wireless communication system. One embodiment of a method includes accessing information indicative of one or more first signals transmitted by one or more first mobile units from one or more first sectors. The method also includes accessing information indicative of one or more second signals transmitted by one or more second mobile units from one or more second sectors different than the first sectors. The method further includes canceling interference caused in the second signal(s) by the first signal(s) using the accessed information indicative of the first signal(s) and the second signal(s). The method also includes jointly scheduling and allocating resources to one or more mobile stations in one or more sectors of one or more base stations.

A method of changing connection parameters in a cellular radio system comprising terminals, base stations, and radio network controllers, and where at least one terminal is in a macrodiversity connection wherein at least one diversity branch goes between the serving radio network controller and the terminal through the drift radio network controller and the drift base station, and which further comprises a load control wherein the radio network controller monitors and balances the use of radio resources in the base stations that operate under it, and a call control wherein the serving radio network controller sets and changes the connection parameters of its connections, and being characterized in that it comprises observing that the load control of the drift radio network controller demands a change in the connection parameters of the terminal communicating through the base station that operates under it, and controlling the serving radio network controller to change the connection parameters of said terminal.

A cellular communication system supports High Speed Downlink Packet Access (HSDPA) services. A first transceiver (201) transmits HSDPA downlink packet data in a first cell and a second transceiver (203) transmits HSDPA downlink packet data in a second cell. A cell overlap processor (205) can determine that a remote station (101) is in a cell overlap region between the first cell and the second cell. A macro-diversity controller (207) causes the first transceiver (201) to transmit first HSDPA data to the remote station (101) as a first signal in the first cell and the second transceiver (203) to transmit the first HSDPA data to the remote station (101) as a second signal in the second cell. The first and second signals are macro-diversity signals. The remote station (101) comprises a macro-diversity combiner (303) which receives the first downlink HSDPA packet data by combining the first signal and the second signal. The invention may allow improved support of HSDPA services in cell overlap areas.

A mobile communication system based on OFDM is prepared as forming service region by multiple sub-network and forming each sub-network by a numbers of cells, switching-in mobile table with fixed network through radio link with BTS and BSC as well as MSC / GW, using the same downlink carrier frequency and the same uplink carrier frequency synchronous operation by all BTS in sub-network. The method for switching over channel distribution is also disclosed.

A method for processing signals in a communications system comprising a first station and a plurality of second stations, said method comprising the steps of receiving at said plurality of second stations signals from said first station; sending said received signals to a designated one of said plurality of second stations; and processing in said designated second station the signals received by plurality of second stations to provide a single signal.

A wireless communication system, a base station device, a mobile station device, and a macrodiversity selection method of the invention, in a base station device including a macrodiversity function among a plurality of sectors, select a macrodiversity method for the mobile station device from a plurality of macrodiversity methods, in accordance with a predetermined determination reference based on reception conditions of the mobile station device.

A communication system using fast macrodiversity switching (FMS) and frequency hopping (FH) for wireless signals including downlink signals to and uplink signals from mobile stations. Frequency hopping sequences are determined for the uplink and downlink signals for the mobile stations. A plurality of transceiver stations employ broadcast channels and dedicated channels for communications with the mobile stations. A zone manager controls fast macrodiversity switching of dedicated channels among the mobile stations while broadcast channels remain unswitched. The zone manager extracts frequency hopping information to form predictions of dedicated channel collisions, and based upon the predictions, controls the dynamic switching of dedicated channels to avoid collisions.

A transmitter forms each subcarrier group of only frequency locations of subcarriers to which at least one pilot signal is allocated, and conducts transmission by allocating a macro-diversity signal into the subcarrier group and allocating a non-macro-diversity signal to other frequencies (outside the subcarrier group). As for the macro-diversity signal, a receiver conducts channel estimation on the basis of the pilot signal in the same subcarrier group as the macro-diversity signal. As for the non-macro-diversity signal outside the subcarrier group, the receiver conducts channel estimation on the basis of the pilot signal, and results of channel estimations of the macro-diversity signal and other non-macro-diversity signals.

The present invention relates to a system and method for planning networks for mobile terminals that use a radio interface based on the Code Division Multiple Access or CDMA technique. More particularly, the system and method provide a step 500 whereby the Service Areas in these networks can be calculated using, as a reference, Domains calculated by means of a step 300 on the basis of real propagation models and taking a predetermined or estimated traffic into account on a pixel by pixel basis. In addition, the system and method make it possible to calculate the Macrodiversity Areas by means of a step 700, and thus to take the areas in which mobile terminals are capable of exchanging information with more than one radio base station into account at the planning step.

The inventive embodiment provides a comprehensive implementation method of macro-diversity combining and interference control, a system and a base station. The method comprises the following steps: determining a non-serving cell base station needing to participate in macro-diversity combining MDC in a UE active set by a serving cell base station; transmitting an indication information to the non-serving cell base station needing to participate in MDC by the serving cell base station to indicate the non-serving cell base station to participate in MDC; and transmitting an indication information to other non-serving cell base stations in the active set by the serving cell base station to indicate the other non-serving cell base stations to carry out interference control operation. The system comprises the serving cell base station, the non-serving cell base stations, and a user terminal. The technical scheme can achieve macro-diversity combining and interference control in a more flexible manner, thereby optimizing the system performance.

The invention relates to a downlink transmission scheme that supports downlink HARQ operation and macro-diversity that is capable of overcoming the problem of HARQ protocol de-synchronization when using HARQ in the downlink with multiple data transmitting network nodes. In this scheme, a distributed HARQ protocol operation for downlink data transmissions involving multiple network nodes is provided, where only one network node is terminating downlink HARQ protocol operation towards to mobile terminal, i.e. retransmissions of a data packet are sent from a single network node, a single HARQ transmitter, to the mobile terminal. The multiple network nodes send a first transmission of the data packet to the mobile terminal in a single transmission time interval using HARQ. One of the multiple network nodes is designated as the HARQ terminating node that controls / handles all retransmissions of the data packet.

The invention relates to communication field and discloses a configuring method, a receiving method and a unit of multicast broadcast service mapping message, which realizes the macro diversity of MBS, enhances the receiving performance of MBS in the communication system. In the invention, the message unit of MBS transmits the physical layer parameter necessary for configuration of MBS mapping message MBS_MAP to all of the MBS operating units in one MBS field; the operating unit of MBS transmits the configured MBS_MAP to the receiving unit of MBS after configuring MBS_MAP based on the received physical layer parameter; the receiving unit of MBS receives MBS service based on MBS_MAP. The invention realizes the macro diversity of MBS in the radio network and enhances the receiving performance of MBS. When applied in WiMAX network, the management unit of MBS is a MBS agent, the operating unit of MBS is a base station, the receiving unit of MBS is a terminal.

A method for intersystem transfer of calls from a first cellular mobile radio system using the macrodiversity transmission technique to a second cellular mobile radio system, the macrodiversity transmission using a radio network controller of the first system, referred to as the serving controller, and at least one other radio network controller of the first system, referred to as the drift controller, wherein adjoining cell information relating to the second system is signaled to the serving controller by at least one drift controller controlling at least one serving cell belonging to the first system and having at least one adjoining cell belonging to the second system.

A method of controlling a data unit transmission from a sender (10) to a receiver (11) is described, comprising the steps: the sender (10) sending a data unit (101) to the receiver (11), the receiver (11) sending to the sender (10) a feedback message (102) comprising receipt status information (104) for the data unit (101) indicating one of at least correct receipt and incorrect receipt, and the sender (10), subsequent to receiving the feedback message (102), sending to the receiver (11) feedback response information (105) indicating a receipt status indicated in the received feedback message (102).

An apparatus, method, system and software product are for receiving a broadcast service or a multicast service. User equipment receives information about transmissions of data for a broadcast or multicast. The data is transmitted in non-overlapping signals from a plurality of cells. The user equipment then uses this information to attempt to decode at least one of the signals, if decoding another of the signals failed.

The invention discloses a method of ascending macro diversity combination, which mainly considers the data package quality of the CFN number when it receives the different branch data package; if the quality is good and meets the combining condition in the combining timer, it can do the combination and the bed quality data package is abandoned.

The present invention provides an upper macro diversity method of mobile communication system, under the soft switching course, including: unpacking measurement report when the radio network controller or base station receiving the measurement report aquiring link quality of each data link; analyzing the unpacked measurement report, if the quality for executing the first radio network controller of the upper macro diversity or the link being highest, then direct uploading the data received from the data link to the core network equipment. The invetion processes unpacking to the measurement report to judge which data lind has the best quality, direct uploading the best data lind to the core network equipment by the radio network controller or base station for the upper macro diversity, data or signaling not the best data does not transmitted between the radio network controller or base station under the course, reducing network communications volume of the upper macro diversity when processing the soft switching, and reducing the network load.

The invention relates to an ascending macro grouping method used in multi-antenna orthogonal frequency-division multiple cellular systems, wherein said network comprises user terminal, base station and wireless network controller; the method comprises that: each one of base stations via channel evaluation, obtains the channel gain matrix factor between user terminal and base station; via channel gain, calculating out the signal / noise ratio of each antenna branch of each base station; sequencing the signal / noise ratios, form all antennas of all base stations, selecting the multi-amplitude antenna relative to the user antennas with high signal / noise ratio; based on selected antenna branch, the base station of said antenna branch uses relative carrier wave to process fast Fourier transform demodulation; and the wireless network controller processes multi-antenna check or decode on demodulated signal.

The invention discloses a method, a device and a system for deleting links. The method comprises that a radio network controller (RNC) detects whether a current situation meets following conditions: user equipment (UE) is in a macrodiversity state, at least one radio link (RL) corresponding to the UE fails in reconfiguration, and at least one RL succeeds in reconfiguration; if the conditions are met, the RNC indicates that the UE delete the RL failing in reconfiguration; and the RNC informs a base station corresponding to the RL failing in reconfiguration to delete the failed RL after receiving response information completed by a business processing flow which is returned by the UE. By means of the method, the device and the system for deleting links, the business processing flow is optimized, the processing time delay is shortened, the air interface interaction is reduced, and air interface resources are saved.

This invention discloses a receiving method for up-stream macro-diversities of OFDM cellular communication including: 1, the system selects multiple base station antennas with the optimum chain performance to receive the up-line signals of users of the edges of non-sector local areas in the cellular communication system, 2, said system selects multiple fan area antennas with the best chain performance to receive the up-line signals of the users at the edges of sector areas, 3, these antennas demodulate the received signals by quick Fourier transform and make the maximum S / N ratio combination to the information on the sub-carriers used by the users so as to increase the up-line rate of the users.