Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

1451 results about "Channel capacity" patented technology

Channel capacity, in electrical engineering, computer science, and information theory, is the tight upper bound on the rate at which information can be reliably transmitted over a communication channel.

Method and system for asymmetric satellite communications for local area networks

A method and system for providing high-speed, satellite-based information delivery is described. Improved communication channel efficiency is accomplished by employing an asymmetric data flow. The high bandwidth channel capacity of digital satellite systems is used for the download of large volumes of data. While relatively low speed communication channels are used for upstream data requests. The use of separate channels for upstream data and downloaded data provides an increased efficiency of use for typical internet and other electronic information service subscribers. A typical user in such systems generally makes relatively short information requests. These requests are then followed by large amounts of information being transferred to the user's computer in response to the request. The volume of data being downloaded often causes a capacity overload of typically used land lines. This invention solves this problem, without becoming prohibitively expensive, by employing digital satellite dish receivers to receive the high volume of downloaded data and using the relatively low speed communication channels low volume upstream requests. Moreover, this invention is designed to interface with all common communication devices as well as being designed to operate on and with all common computing platforms.
Owner:HUGHES NETWORK SYST

Promotion server using video on demand channel

Idle Video-On-Demand (VOD) channel capacity is used to deliver promotional content to selected set-top boxes (STBs) in a cable television network. Commercial segment cues are used to instruct a set-top box to switch away from a broadcast program to the VOD channel during a commercial segment, and then switch back again to the original broadcast program at the end of the segment.
More particularly, a promotion server determines an asset to be distributed such as a targeted promotion item (e.g., a commercial), and a list of STBs that are to receive it. The promotion server causes the video promotion content to be stored in VOD servers located at the head ends. A scheduler process then delivers schedule messages to head end message servers which identify each promotion asset, and an STB which is to receive it. The head end message server notifies its associated VOD server which then cues the asset by loading the asset, starting the asset, but pausing it. Prior to the occurrence of a commercial slot in a broadcast program, an asset trigger is inserted into the broadcast stream at the head end. This asset trigger contains general information concerning the asset to be sent, and an idle VOD channel number. The STB receives the asset trigger and readies itself to tune to the VOD channel when cued for at the beginning of a commercial segment, but does not yet tune to the VOD channel. Upon detection of a commercial cue tone in the broadcast channel, the head end message server sends a tune away trigger to the STB, and also instructs the VOD server to start playing the cued promotion. When the STB receives a tune away trigger, it switches from the broadcast channel being played to the selected idle VOD channel, and the promotion is viewed.
Owner:MICROSOFT TECH LICENSING LLC

Frequency and power distributing method based on NOMA (non-orthogonal multiple access) system

The invention relates to a frequency and power distributing method based on an NOMA (non-orthogonal multiple access) system. The frequency and power distributing method comprises the following steps: confirming a user set for sending information to a cell by a base station and obtaining CSI (channel state information) of the user set at a base station end; distributing each sub channel to a user with the best CSI condition, and regarding the user as a strong user; based on this, combining the strong user with other users in sequence, calculating a maximum channel capacity value of each pair of sets, selecting one pair of set with maximum channel capacity value, and regarding another user in the set as a weak user; distributing two users which are respectively the strong user and the weaker user on each sub channel, wherein the set comprising the strong user is a strong user set Omega A, and the set comprising the weak user is a weak user set Omega B; performing optimal power distribution on the strong user and the weak user on each sub channel respectively. The method can meet large-scale user transmission needs in the future, and increases access probability of the user, so that the spectrum efficiency of the system is improved.
Owner:CERTUS NETWORK TECHNANJING

Increasing channel capacity of TDMA transmitters in satellite based networks

The present invention discloses a method for increasing the channel capacity of a communications network, comprising a plurality of one-way TDMA transmitters sharing said channel, and at least one compatible receiver, by reducing transmission collisions among said transmitters. This is achieved by coupling a Global Navigation Satellite System (GNSS) decoder, such as a GPS receiver, to each transmitter, and limiting transmissions to discrete time slots, determined by timing signals provided by said GNSS. Further, this basic set of time slots is divided into several sub sets, and each transmitter selects a sub set of time slots according to its geographic location, in order to enable reusing time slots in spaced apart areas, as frequencies are reused in cellular networks. Then, each transmitter selects its own transmission time slot, from said sub set, in a way that statistically minimizes collisions among nearby transmitters. The present invention does not intend to ensure collision-free communications, yet is projected to reduce the transmission collision rate among simplex in nature transmitters, which have no means to detect other transmissions, or discover if a transmission was successful. One embodiment of this invention is related to distress radio beacons in satellite based Search and Rescue (SAR) systems, such as Cospas-Sarsat.
Owner:MOBIT TELECOM

Method for self-adaption selection of relay strategy for multi-relay collaboration communication

A self-adapting method which is used for a relay strategy of a multiple-relay cooperative communication respectively selects an appropriate retransmission mode and distributes a corresponding transmission power for each relay code according to the state of current real-time channel. Or a direct transmission mode is decided to be selected in order to realize the maximization of the channel capacity of the system and provide a high-efficiency communication under the state of reliability. The method mainly comprises the following operation procedures: (1) estimating the channel, (2) selecting a cooperative partner, (3) choosing an optimum relay strategy for each rely with the result of channel estimation and partner selection, (4) respectively calculating the capacity of the direct transmission channel and the capacity of the channel of the selected relay plan according to the formula of channel capacity, and (5) taking the plan with larger capacity of the equivalent channel as a final selection result. The method determines whether the relay is used according to the current channel state, and selects an optimum retransmission strategy for each relay under the precondition that the reliability and availability of the communication are considered and reasonably distribute power between the signal source and each relay.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products