161 results about "Point-to-multipoint communication" patented technology

Applications, systems and methods for efficiently accessing and controlling data of devices among multiple computers over a network. Strategic cache management processes are provided to manage the data in cache memory of the storage devices involved. Communication of data over the network may be managed by means of one or more connection servers which may also manage any or all of authentication, authorization, security, encryption and point-to-multipoint communications functionalities. Alternatively, computers may be connected over a wide area network without a connection server, and with or without a VPN. Data transmissions may be managed to minimize bandwidth and may be temporally and / or spatially compressed.

Point-to-point or point-to-multipoint communications are established based on a database query broadcast to all stations. Stations satisfying the query respond and communications are established with the station(s) responding. The database query is preferably directed to location, status or history of the station being queried. Responding stations may be displayed on a moving map and establishing communications with a responding station can be established by touching an icon of the station on a touch screen display.

A point-to-multipoint communications network includes an optical line terminal (OLT) and a number of optical network terminals (ONTS) which each detect and remove rogue ONTs from the network. The OLT monitors transmission errors to detect the presence of a rogue ONT, and can determine the identity of the rogue. Each ONT monitors its own upstream data packets to detect the presence of a rogue, and turns itself off when a rogue is detected.

A method and apparatus are provided for wirelessly delivering multi-channel content (106) from an electronic device (201), such as a MP3 player or mobile telephone having multi-media capabilities, to a user. A system (200) includes the electronic device (201), a first wireless loudspeaker device (100) and a second wireless loudspeaker device (205). One of the wireless loudspeaker devices (100) establishes a point-to-multipoint communication structure with the electronic device (201) and the other, matching wireless loudspeaker device (205). As such, the electronic device (201) is able to deliver multi-channel content (106) to the first wireless loudspeaker device (100) with a single transceiver (252). The wireless loudspeaker device (100) may then deliver single-channel content to a locally disposed loudspeaker (103). The wireless loudspeaker device (100) also transmits single-channel content (107) to the second wireless loudspeaker device (205). The wireless loudspeaker devices (100,205) are capable of negotiating an ascendancy relationship between themselves, with one wireless loudspeaker device becoming dominant. This relationship may be transferred without interrupting content delivery to the user.

A system for providing statistical multiplexing of speech, other real-time data services and non-real-time data services for point to point and point to multipoint communications. The system has fast access and assignment procedures that allow the multiplexing of real-time, delay-critical data services with non-real-time data services. Continuity of periodic control channels across speech talkspurt and silence periods for conversational voice is maintained to carry signal measurement reports, channel quality feedback, and “comfort” noise information between different parts of the system.

Methods and systems for simultaneous transmission of simulcast and single cast information over a hybrid point to multipoint communication systems, including the steps of: selecting an area to be ubiquitously covered by a common channel; assigning a first wireless client to the common channel; assigning a second wireless client to a first private channel; setting a first hybrid converter and a second hybrid converter having an aggregated coverage area that comprises the selected area; connecting the first hybrid converter using an orthogonal multi-carrier transmission having a first frequency and the second hybrid converter using an orthogonal multi-carrier transmission having a second frequency to a centralized synchronizing communication controller via a shared signal wired distribution line; converting, by using the first hybrid converter, the first frequency transmission to a third orthogonal multi-carrier wireless transmission having a third frequency; converting, by using the second hybrid converter, the second frequency transmission to a fourth orthogonal multi-carrier wireless transmission having the third frequency; and creating a downlink ubiquitous coverage in the selected area by transmitting the third and the fourth transmissions, each comprising a common MAP over a first sub-channel, a common payload over a second sub-channel, and a first private payload and a second private payload, correspondingly, over a third sub-channel, wherein the third and fourth transmissions are at least partially coverage-overlapping and are synchronizing and bandwidth allocating a first wireless client and a second wireless client.

Applications, systems and methods for efficiently accessing and controlling data of devices among multiple computers over a network. Communication of data over one or more networks may be managed by means of one or more connection servers which may also manage any or all of authentication, authorization, security, encryption and point-to-multipoint communications functionalities. Alternatively, computers may be connected over a wide area network without a connection server, and with or without a VPN.

Applications, systems and methods for efficiently accessing and controlling data of devices among multiple computers over a network. Communication of data over one or more networks may be managed by means of one or more connection servers which may also manage any or all of authentication, authorization, security, encryption and point-to-multipoint communications functionalities. Alternatively, computers may be connected over a wide area network without a connection server, and with or without a VPN. In any case, file structure integrating means are configured to integrate a file structure of accessible files accessed at a second or first computer, into a file structure contained at the first or second computer, respectively.

A communication system (100) determines whether to establish a point-to-multipoint communication or a point-to-point communication for conveyance of Multimedia Broadcast Multicast Service (MBMS) data based on a number of mobile stations (MSs) (102-104), both idle mode and maintaining an active connection, serviced by the system and subscribed to an MBMS service. The system, broadcasts (306) a control message that includes an access probability factor. In order to avoid overloading the system with responses to the control message, MSs maintaining an active connection ignore (506, 508) the control message while idle mode MSs determine (506, 512) whether to respond based on the access probability factor. The system compares (310) a number of received responses to a threshold and determines whether to establish a point-to-multipoint communication (312) or a point-to-point communication (322) based on the comparison. The system also adjusts (314, 330) the access probability factor based on the number of responses.

In Low Earth Orbit (LEO) satellite networks data routes for point to point and point to multipoint communication sessions in LEO satellite networks are determined by considering session bandwidth, priority, and the constantly changing terminal-satellite and satellite-satellite connectivity. Multiple routes are computed for a session to facilitate automatic adaptive rerouting by satellite payloads when they encounter network failures or congestion conditions.

Methods and systems for Ubiquitous coverage OFDM hybrid point to multipoint communication system, including the steps of: determining transmission synchronization and bandwidth allocation between a first wireless client and a second wireless client communicating via a common wireless communication channel, by using a wireless point to multi point centralized synchronizing communication controller; transmitting to the air a download multi carrier transmission, via the common wireless communication channel using a first wireless frequency, wherein the download multi carrier transmission comprises the determined transmission synchronization and bandwidth allocation; receiving the download multi carrier transmission by a first hybrid converter and by a second hybrid converter; shifting the frequency of the download multi carrier transmission from the first wireless frequency to a second wireless frequency in the first hybrid converter and in the second hybrid converter; and transmitting the frequency-shifted download multi carrier transmission to the air from the first hybrid converter and from the second hybrid converter using the second wireless frequency, wherein the transmission coverage areas of the first and of the second hybrid converters are at least partially overlapping, and wherein the first wireless client is located in the overlapping coverage area.

A point-to-multipoint communications system. The system uses an antenna to generate a single beam having independently steerable, narrow lobes. The phase array and amplitude array distributions used to form the lobes are controlled so that the lobes track and provide full duplex communication links with two or more RF terminals in two or more remote locations. In certain embodiments the dual lobe beam is generated from a fixed, ground-based location, and in other embodiments the single beam is generated from an airborne mobile platform, a mobile land vehicle, or a marine vessel. The various embodiments all enable one, two or more full duplex communication links to be established and maintained with a single beam.

In an Orthogonal Frequency Division Multiplexing communication system wherein a frequency bandwidth is divided into multiple sub-bands, a method and a scheduler is provided for configuring channel quality feedback for a point-to-multipoint communication session involving multiple users equipment (UEs). The scheduler receives multiple channel quality measurements from the multiple UEs and, based on the multiple channel quality measurements, determines whether to implement a frequency selective channel quality feedback scheme or a non-frequency selective channel quality feedback scheme for the point-to-multipoint communication session. The scheduler then implements the determined channel quality feedback scheme. In another embodiment of the invention, the scheduler may determine whether to implement a frequency selective or non-frequency selective channel quality feedback scheme based on a number of UEs serviced by the scheduler.

Methods and systems for hybrid point to multipoint communication systems, including the steps of: determining transmission synchronization and bandwidth allocation between a first wireless client and a second wireless client communicating via a common communication channel; transmitting a download multi carrier transmission, via a shared signal wired distribution line, wherein the download multi carrier transmission comprises the determined transmission synchronization and bandwidth allocation; receiving the download multi carrier transmission by a first hybrid converter and by a second hybrid converter connected to the shared signal wired distribution line; shifting the frequency of the download multi carrier transmission from a wired distribution line frequency to a wireless frequency in the first hybrid converter and in the second hybrid converter; and transmitting the frequency-shifted download multi carrier transmission to the air from the first hybrid converter and from the second hybrid converter.

Methods and systems for hybrid point to multipoint communication systems having multiple downlink channels and a single uplink channel, including the steps of: centrally allocating bandwidth to, and synchronizing communications with, a first and a second wireless clients; transmitting, over a shared signal wired distribution line, a first downlink signal transported over a first frequency, a second downlink signal transported over a second frequency, and an uplink signal transported over a fifth frequency; converting the frequency of the first downlink signal to a third frequency, and bi-directionally wirelessly communicating with a first wireless client over the third frequency; converting the frequency of the second downlink signal to a fourth frequency, and bi-directionally wirelessly communicating with a second wireless client over the fourth frequency; and converting and superpositioning a first received wireless uplink signal having the third frequency and a second received wireless uplink signal having the fourth frequency to the uplink signal that is transmitted over the shared signal wired distribution line using the fifth frequency.

Methods and systems for filtering and enhancing the uplink reception sensitivity of OFDMA hybrid point to multipoint communication systems, including the steps of: determining transmission synchronization and bandwidth allocation for a plurality of wireless clients; communicating with the wireless clients via a plurality of hybrid converters connected to a shared signal distribution line, by using a wireless point to multi point centralized synchronizing communication controller and an OFDMA modulation; receiving wireless upload transmission by using the hybrid converters; and blocking non-information carrying sub-carriers, received by at least one of the hybrid converters, before superpositioning the received wireless upload transmissions on the shared signal distribution line.

An apparatus and a method for performing a protocol that optimizes a transmission power in a network. The apparatus and the method perform a protocol that optimizes the transmission power in the network for point-to-multipoint communication (1:N). The apparatus includes a communication unit for sending and receiving a data packet through the air, and a control unit that outputs a control signal for controlling the transmission power according to connection information of the data packet received through the communication unit. The connection information includes a reception signal strength and / or link quality information. Since the transmission power is adjustable, communication is carried out among nodes of the network with an adequately minimum power consumption and a proper communication quality.

A point-to-multipoint communications system. The system uses an antenna to generate a single beam having independently steerable, narrow lobes. The phase array and amplitude array distributions used to form the lobes are controlled so that the lobes track and provide full duplex communication links with two or more RF terminals in two or more remote locations. In certain embodiments the dual lobe beam is generated from a fixed, ground-based location, and in other embodiments the single beam is generated from an airborne mobile platform, a mobile land vehicle, or a marine vessel. The various embodiments all enable one, two or more full duplex communication links to be established and maintained with a single beam.

An advance over the prior art is achieved through an efficient method to retransmit erroneous frames by identifying the users who are most likely to experience a frame error and requests retransmissions from them. Since the recovery is done by starting with the most likely, second most likely etc., the invention results in faster recovery of data. Moreover, the invention reduces the battery consumption of subsequent mobile nodes by suppressing the retransmission requests that were already made by nodes preceding it. A key element of the invention is to rank the set of receiver nodes in the order of decreasingly worse channel conditions, i.e., from worst to best. Hence, with K receiver nodes, a transmit node assigns rank 1 to a receiver node to which it has the poorest radio channel condition. Similarly, it assigns rank K to the receiver node to which it has the best radio channel condition. The channel condition is known at the receiver by keeping a simple measure of the number of data frames correctly received so far and the total number of frames transmitted to it. This information can be periodically sent back to the transmitter and thus aiding in the ranking procedure. Alternatively, if the transmitter is capable of sending a pilot / beacon, the receiver can do some averaging of received signal strength and provide such information back to the transmitter.

A method and system for adaptive point to multipoint wireless communication. The method and system integrate adaptive and dynamic responsiveness for communication parameters related to multiple characteristics of wireless communication links, both for a single sender and a single receiver, and for sets of multiple senders and multiple receivers. Moreover, the method and system are self-optimizing in the sense that they are adaptively and dynamically responsive to results of attempts to optimize parameters related to multiple characteristics of wireless communication links. Multiple characteristics of wireless communication links are optimized simultaneously, in that the optimal set of values for a plurality of N characteristics, rather fan N individual optimal values for each characteristic, is adaptively and dynamically selected.

The present invention comprises aggregating a plurality of physical channels to a single logical channel, a scalable virtual channel (SVC). This may be implemented in a point to multipoint communications system. The present invention enables a variety of receivers, some receivers being able to receive only one physical channel, and other receivers being able to receive a plurality of physical channels as a SVC, with at least one same channel being used for both types of receivers.

An apparatus and a method for performing a protocol that optimizes a transmission power in a network. The apparatus and the method perform a protocol that optimizes the transmission power in the network for point-to-multipoint communication (1:N). The apparatus includes a communication unit for sending and receiving a data packet through the air, and a control unit that outputs a control signal for controlling the transmission power according to connection information of the data packet received through the communication unit. The connection information includes a reception signal strength and / or link quality information. Since the transmission power is adjustable, communication is carried out among nodes of the network with an adequately minimum power consumption and a proper communication quality.

The dynamic management method for ASON multicast business member comprises: based on original P2P business, by the advantage that ASON can automatic find network resource and topology, using resource pre-adding / pre-subtracting and multicast tree grafting / pruning techniques, calculating the optimal patch, and providing well-efficient point-to-multi-point communication connection. This invention is benefit to share bandwidth resource, and reduces total-patch cost.

Some embodiments of the invention provide devices, systems and methods of point to multipoint communication. For example, an apparatus in accordance with an embodiment of the invention includes a resource allocator to allocate a wireless communication channel resource to one or more stations of a wireless communication system based on a net benefit function that takes into account an overhead incurred by controlling the allocation of said channel resource.

The invention discloses a method for implementing the subscriber port identification of a broadband access device, which is applied to a gigabit-capable passive optical network (GPON) system. The method comprises the following steps: (1) when a subscriber initiates an access request, a multi-port optical network unit (ONU) captures the access request message and adds the subscriber basic information to the request message and then transmits the request to an optical line terminal, and a single-port optical network unit transfers the message to the optical line terminal; (2) the optical line terminal adds the ONU basic information to the message and transmits the request to the broadband access device; and for the multi-port optical network unit, the ONU basic information and the subscriber basic information combine to form the subscriber port identification information; and for the single-port optical network unit, the ONU basic information serves as the subscriber port identification information; and (3) the broadband access device receives the request and then resolves the subscriber port identification information and transmits the information to an authentication server for the binding authentication of the relevant information. The method achieves the effect of accurate subscriber identification of the optical network unit in the point-to-multipoint communication mode.

The invention discloses a relay communication system and method based on a UAV platform. The system includes: a ground communication terminal and a UAV-borne relay communication platform. The UAV-borne communication platform is set on the UAV for To forward the data transmission between different ground communication terminals, the UAV-borne relay communication platform adopts an airborne antenna with a beam width of 160 degrees, the gain is 3-5dBi, and the radio frequency power amplifier power is 10 watts; The communication platform to the ground communication terminal is a point-to-multipoint communication method, and data is transmitted based on time division multiplexing, and the ground communication terminal to the UAV communication platform is a multipoint-to-point communication method, using TDMA Data is transmitted in multiple access mode. The system greatly increases the effective coverage area of ​​communication; at the same time, it makes emergency communication in complex terrain more efficient and convenient, and realizes that the wireless link can still communicate normally in the case of non-line-of-sight.

The invention provides a method and system for adaptive point to multipoint wireless communication. The wireless physical layer and the wireless media-access-control (MAC) layer collectively include a set of parameters, which are adaptively modified by a base station controller for communication with a plurality of customer premises equipment. The base station controller adjusts communication with each customer premises equipment individually and adaptively in response to changes in characteristics of communication, including physical characteristics, amount of communication traffic, and nature of application for the communication traffic.