82 results about "Channel reliability" patented technology

A system and method for identifying ideal channels for communications based on an analysis of communication channel reliability, communicating party preferences, and communicating party contexts is provided. The system attempts to optimize the utility of a communication based on inferred or directly accessed channel reliability data, communicating party preferences and communicating party contexts. Such optimization can be achieved using reliabilities, preferences and policies concerning handling the attempted contact based on a deterministic specification or through inferring reliability, context, content and task under uncertainty by employing decision-theoretic inferences. The methods may consider channels currently available as well as channels available at later times. Thus, the service can include automated rescheduling of communications based on a consideration of forecasts of reliability and availability. The approach may include the use of forecasts about the time required for a communication and the likelihood that a connection will be dropped or will lose fidelity over this period of time. The methods may also include a consideration of metadata within a standard schema that is transmitted along with a communication attempt, the metadata representing information about attributes like the potential communication channels, the identity of the contactor, the task at hand, and the context of the communicating parties. The invocation of the communication service may be performed in a variety of ways, including single button invocations, and via a communication service that is more deeply integrated with other applications and functionalities.

A user equipment (UE) may determine when to monitor for downlink (DL) communications such as paging messages based on both a received extended idle discontinuous reception (eI-DRX) cycle and a change in a downlink channel reliability condition of the UE. A base station may also adjust its transmission of paging information to a UE based on a eI-DRX cycle.

Embodiments of the invention provide a method and device for determining channel reliability in polarization coding modulation. The method comprises: dividing a channel into m binary input channels, carrying out channel polarization transformation, and using a Gaussian approximation algorithm to calculate a log likelihood ratio Gaussian distribution mean corresponding to the polarization sub-channels according to the equivalent noise variance of the binary input channels obtained by splitting, so as to determine the reliability of the polarization sub-channels. Since the method provided by the invention adopts the Gaussian approximation algorithm, the problem of calculation complexity caused by calculating the channel reliability by using a density evolution tool is avoided. Compared with the scheme of calculating the channel reliability by using the density evolution tool, the calculation complexity of the method provided by the invention is obviously reduced.

A system and method for identifying ideal channels for communications based on an analysis of communication channel reliability, communicating party preferences, and communicating party contexts is provided. The system attempts to optimize the utility of a communication based on inferred or directly accessed channel reliability data, communicating party preferences and communicating party contexts. Such optimization can be achieved using reliabilities, preferences and policies concerning handling the attempted contact based on a deterministic specification or through inferring reliability, context, content and task under uncertainty by employing decision-theoretic inferences. The methods may consider channels currently available as well as channels available at later times. Thus, the service can include automated rescheduling of communications based on a consideration of forecasts of reliability and availability. The approach may include the use of forecasts about the time required for a communication and the likelihood that a connection will be dropped or will lose fidelity over this period of time. The methods may also include a consideration of metadata within a standard schema that is transmitted along with a communication attempt, the metadata representing information about attributes like the potential communication channels, the identity of the contactor, the task at hand, and the context of the communicating parties. The invocation of the communication service may be performed in a variety of ways, including single button invocations, and via a communication service that is more deeply integrated with other applications and functionalities.

A novel protocol for an ad-hoc, peer-to-peer radio network that provides collision-free channel access with an emphasis on improving geographic reuse of the frequency spectrum. The protocol of the invention is executed on the reservation or control channel, and provides a method for allocating data transactions on the data channels. The system of the invention utilizes multiple parallel data channels that are coordinated by a single reservation channel. The transceiver of the system employs two modems to solve the channel reliability issues with multiple channel designs, where one is dedicated as a receive-only modem for gathering channel usage information on the reservation channel. High quality voice, video and data may be transmitted. The reservation channel implements a time division multiple access algorithm with dynamic slot allocation. In a distributed manner, nodes determine geographic reuse of slots based on channel quality extracted from the modem. Signal quality calculations are used to determine the likelihood of a slot reuse causing destructive interference within a node's neighborhood. Requests for slot usage are compared with the known traffic pattern and accepted or rejected by nodes within RF signal range based on the signal quality calculations.

A novel protocol for an ad-hoc, peer-to-peer radio network that provides collision-free channel access with an emphasis on improving geographic reuse of the frequency spectrum. The protocol of the invention is executed on the reservation or control channel, and provides a method for allocating data transactions on the data channels. The system of the invention utilizes multiple parallel data channels that are coordinated by a single reservation channel. The transceiver of the system employs two modems to solve the channel reliability issues with multiple channel designs, where one is dedicated as a receive-only modem for gathering channel usage information on the reservation channel. High quality voice, video and data may be transmitted. The reservation channel implements a time division multiple access algorithm with dynamic slot allocation. In a distributed manner, nodes determine geographic reuse of slots based on channel quality extracted from the modem. Signal quality calculations are used to determine the likelihood of a slot reuse causing destructive interference within a node's neighborhood. Requests for slot usage are compared with the known traffic pattern and accepted or rejected by nodes within RF signal range based on the signal quality calculations.

Various methods for data transmission based on signal priority and channel reliability are provided. One example method includes encoding a number of bits into coded bits including systematic bits and respective associated parity bits, the bits being encoded for transmission via channels of a multi-channel communications system including a more reliable channel and a less reliable channel. The example method also includes allocating the systematic bits to bit locations within a first stream corresponding to the more reliable channel, allocating the systematic bits to bit locations having a higher signal priority within a second stream corresponding to the less reliable channel, and allocating the parity bits to bit locations within the second stream. Similar and related example methods and apparatuses for allocating the systematic and parity bits to the respective bit locations in both the more and less reliable channels are also provided.

The invention relates to an estimation method for time and frequency domain joint channel, which comprises: adding some pilot frequency between OFDM symbols with quantity related with channel variation feature; using known 144chip in every conventional time slot of TD-SCDMA system as pilot frequency to insert into opposite carrier by one-dimension interpolation; on receiver end, obtaining need channel response on every symbol time and every sub-carrier according to two inserted pilot frequencies, taking weighted-mean to estimated results to obtain final need channel response. This invention can improves channel reliability in TD-SCDMA system effectively.

A decoding method, a memory storage device and a memory control circuit unit are provided. The method includes: programming first data into a first physical unit of a rewritable non-volatile memory module; reading the first physical unit to obtain second data; obtaining a first threshold voltage distribution of a first bit-value and a second threshold voltage distribution of a second bit-value according to the first data and the second data, wherein the first bit-value and the second bit-value are different; calculating first channel reliability information corresponding to the first physical unit according to the first threshold voltage distribution and the second threshold voltage distribution; and decoding third data stored in the first physical unit according to the first channel reliability information. Therefore, decoding efficiency for the first physical unit is improved.

The invention discloses a hierarchical matching method based on channel quality prediction in a cognitive wireless network. The hierarchical matching method comprises the following steps that: S1, multiple cognitive users form a collaborative perception group; and each cognitive user performs perception by selecting to add the group having the maximum benefit; S2, a group leader trains and constructs a probabilistic suffix tree by utilizing a perception result and predicts the idle probability of the next time slot spectrum through the generated tree; S3, the group leader constructs a channel quality evaluation factor by utilizing the idle probability and sorts the reliabilities of multiple authorized channels in a descending manner; and S4, a dispatching unit distributes proper channels to coded hierarchical data according to a priority-reliability dispatching criterion. By means of the hierarchical matching method, the channel quality can be dynamically estimated in the time-varying cognitive wireless network; the perception delay is reduced; reliable channels can be effectively matched for hierarchical data; and the hierarchical matching method can be used for improving the link adaptation of hierarchical multimedia data in the cognitive wireless network.

Embodiments of the present invention provide systems, methods, and computer program products for an operational reliability index (“ORI”) scoring system in the knowledge management system that is standardized and centralized across the channels and sub-channels in an organization. The ORI system scores the reliability or confidence of the channels, sub-channels, and applications in an organization. The ORI receives reliability data associated with one or more predictability factors related to a business application. The ORI determines predictability factor reliability scores for each of the one or more predictability factors based on the reliability data and weighted values assigned to the predictability factors. Weighted values are also assigned to the categories, applications, sub-channels, and channels. The ORI determines at least one of a category reliability score, application reliability score, business sub-channel reliability score, or business channel score based on the determined predictability factor reliability scores and the weighted values.

The invention provides a decoding method, a memory storage device and a memory control circuit unit. The decoding method comprises the following steps: sending a reading order sequence, wherein the reading order sequence is used for reading memory units to obtain a plurality of first verification bits; according to the first verification bits, executing a first decoding program, and judging whether a first effective code word is generated or not; if no first effective code words are generated, sending another reading instruction sequence to obtain a plurality of second verification bits; according to the second verification bits, calculating a total number of the memory units which meet a specific condition; according to the total number, obtaining channel reliability information; and according to the channel reliability information, executing a second decoding program. Therefore, decoding correction capability is improved.

In general, one embodiment of the invention relates to a method for detecting data bits and estimating the channel reliability of each carrier. The detection method comprises (i) computing a complex phase difference between a current symbol and a previous symbol, (ii) separating a real value component (R) from a corresponding imaginary value component (I) forming the complex phase difference, (iii) determining at least one boundary constraint line of a complex phase map for a selected demodulation scheme, and computing an arithmetic combination of the real value component and the corresponding imaginary value component to detect whether a series of bits falls within a selected region of the complex phase map defined by the at least one boundary constraint line. Over N symbols propagating over a carrier, including the current symbol and the previous symbol, the channel estimation counts a number of symbols (less than N but greater than a threshold) that fall within an estimated area of the complex phase map. The estimated area is bound by boundary constraint lines based on a parameterized real value component.

A decoding method, a memory storage device and a memory controlling circuit are provided. The decoding method includes: sending a read command sequence configured to read the memory cells, so as to obtain a plurality of first verification bits; executing a first decoding procedure according to the first verification bits, and determining whether a first valid codeword is generated; if the first valid codeword is not generated, sending another read command sequence configured to obtain a plurality of second verification bits; calculating a total number of the memory cells conforming to a specific condition according to the second verification bits; obtaining a channel reliability message according to the total number; and executing a second decoding procedure according to the channel reliability message. Accordingly, a correcting ability of decoding may be improved.

The present invention relates to a pre-processing apparatus using nonuniform quantization of a channel reliability value and a low density parity check (LDPC) decoding system. The pre-processing apparatus can present degradation in performance and be embodied simply by performing decoding pre-process by estimating a discrete channel reliability value (Lc*) through nonuniform quantization of a channel reliability value based on a relations between a bit error rate (BER) estimated through a simulation performed in advance and a standard deviation (σ) of channel noise within a predetermined range of noise estimation error and p, and bit-shifting a receiving signal as much as a discrete channel reliability value. The pre-processing apparatus includes: a channel reliability measuring unit, a nonuniform quantizing unit, a sign bit adding unit, a bit shifting unit.

The present invention proposes methods and devices for mobile communication deployed on shared bands, which enhance reliability of channels such as control channels. According to an aspect thereof, at a communication terminal, a list of channels useable for communication is maintained, information on the usability of a currently used channel is obtained, and it is switched to one of the channels of the list of useable channels if the currently used channel becomes unusable. The invention encompasses also corresponding computer products as well as methods, devices and computer products residing at a network node.

The invention relates to a coding method, a wireless device and a chip. The embodiment of the invention provides a coding method. The coding method comprises the steps of: according to the punching / shortening proportion P' and a pre-stored sequence S', obtaining a structural sequence S, the length of which is equal to a target code length M, wherein the S' includes indexes of N' channels arranged according to the channel reliability or capacity; and sorting of the channel indexes in the S and sorting of the channel indexes in the S' are same or different; and mapping a bit sequence to be sent to a channel corresponding to the S. By means of the method, coding can be carried out by generating the proper structural sequence S according to different punching / shortening proportions; and thus, the bit error rate is reduced.

This invention provides different data transmitting methods and devices thereof based on signal priority valve and channel reliability. An demonstrating method of this invention includes: coding multiple bits into coding bits with multiple system bits and multiple parity bits corresponding to each other, for the purpose of transmitting the data, the bits are coding through multiple channels of a communication system with multiple channels, where, the communication system with multiple channels includes a high reliability channel and a lower reliability channel. Said demonstrating method of this invention also includes: assigning system bits to different bits locations corresponding to first series current in channel with high reliability, assigning system bits to different bits locations corresponding to high signal priority valve in second series current in channel with low reliability, and assigning parity bits to the bits locations in second series current. This invention also provides similar or related methods and related devices for assigning system bits and parity bits to corresponding each bits locations in channels with high and low reliability.

A user equipment (UE) may determine when to monitor for downlink (DL) communications such as paging messages based on both a received extended idle discontinuous reception (eI-DRX) cycle and a change in a downlink channel reliability condition of the UE. A base station may also adjust its transmission of paging information to a UE based on a eI-DRX cycle.

Embodiments of the present invention provide systems, methods, and computer program products for an operational reliability index (“ORI”) scoring system in the knowledge management system that is standardized and centralized across the channels and sub-channels in an organization. The ORI system scores the reliability or confidence of the channels, sub-channels, and applications in an organization. The ORI receives reliability data associated with one or more predictability factors related to a business application. The ORI determines predictability factor reliability scores for each of the one or more predictability factors based on the reliability data and weighted values assigned to the predictability factors. Weighted values are also assigned to the categories, applications, sub-channels, and channels. The ORI determines at least one of a category reliability score, application reliability score, business sub-channel reliability score, or business channel score based on the determined predictability factor reliability scores and the weighted values.

A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module servo module comprises two servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have outputs for an unweighted metric and for a measure of the channel reliability. A weight computation module provides first and second weight signals using the measures of channel reliability from the servo channels. A first multiplying node receives a first unweighted metric and a first weight signal and is operable to output a first weighted metric. A second multiplying node receives a second unweighted metric and a second weight signal and outputs a second weighted metric. A summing node receives the first and second weighted metrics and outputs a combined weighted metric to an LPOS word decoder.

A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module comprises two synchronous servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have outputs for an unweighted parameter estimate and for a measure of the channel reliability. A weight computation module provides first and second weight signals using the measures of channel reliability from the servo channels. An offset computation module provides first and second offset terms which are summed with the unweighted parameter estimates. Multiplying nodes receive the unweighted parameter estimates and the weight signals and outputs offset weighted parameter estimates. A summing node receives the offset weighted parameter estimates and outputs a combined offset weighted parameter estimate to a servomechanism.

A decoding method, a memory storage device and a memory controlling circuit are provided. The decoding method includes: sending a read command sequence configured to read the memory cells, so as to obtain a plurality of first verification bits; executing a first decoding procedure according to the first verification bits, and determining whether a first valid codeword is generated; if the first valid codeword is not generated, sending another read command sequence configured to obtain a plurality of second verification bits; calculating a total number of the memory cells conforming to a specific condition according to the second verification bits; obtaining a channel reliability message according to the total number; and executing a second decoding procedure according to the channel reliability message. Accordingly, a correcting ability of decoding may be improved.

A wireless receiver for a distributed antenna diversity receiver apparatus comprising a pre-combining component arranged to receive an RF signal from an antenna and to recover and output an information signal contained within the received RF signal, and a combined-signal component arranged to receive the recovered information signal output by the pre-combining component of the wireless receiver and a further recovered information signal from a further wireless receiver and to perform diversity combining of the recovered information signals to obtain and output an enhanced information signal. The wireless receiver further comprises a monitoring component arranged to receive intra-packet channel reliability parameters for the wireless receiver and for the further wireless receiver, determine whether to assign a new master receiver for the distributed antenna diversity receiver apparatus based on the received intra-packet reliability parameters.

The invention discloses a method for constructing a first-class wiretap channel through a BSBC (Binary Symmetric Broadcast Channel). The method comprises the following steps that: a legitimate receiver transmits feedback information to a legitimate transmitter through the BSBC; the legitimate transmitter and a wire tapper receive the feedback information interfered by noise of the legitimate receiver respectively, and the legitimate transmitter processes encoded information to be transmitted according to the received feedback information and then transmits the processed information through an error-free common channel; the legitimate receiver extracts bit log-likelihood ratio information needed by soft-decision decoding in a specific way firstly, and then decodes the received information in a soft-decision decoding way in order to lower the bit error rate of a main channel, enhance the channel reliability, enlarge a quality difference between the main channel and the wiretap channel and increase the security capacity of the first-class wiretap channel; and the wire tapper passively wiretaps the information transmitted by the legitimate transmitter, and decodes the received information in the soft-decision decoding way. The method is easy to implement, and high channel security capacity and good communication quality are achieved.

The invention discloses a polarization code construction optimization method based on an SCL decoding algorithm. The method comprises the following steps: 1, determining a punching pattern and channelestimation; 2, searching key bits of the SCL decoding algorithm: simulating the SCL decoding algorithm according to the current information set Ai and the current frozen set pattern, and counting theposition of the first information bit with pruning errors in each decoding process in the simulation process; in all the information bits with the pruning error probability exceeding 5%, the bit closest to the tail is selected as the key bit ai searched this time; 3, performing key bit replacement: according to the reliability sequence of each frozen sub-channel in the initial frozen set, selecting frozen bits bi of which the reliability ranks from high to low at the i-th bit, and exchanging the frozen bits bi with the key bits ai found in the step 2, and repeating the steps 2 and 3. The method has a very good decoding error correction performance, and can be suitable for polar code coding optimization of different code lengths, code rates and punching patterns.

The invention discloses a special 2M optical interface multiplexing protection channel and an application method. One side of a 2M optical interface board is provided with a light receiving module anda light emitting module, and the other side is provided with an LC type optical fiber jack; the 2M optical interface board is fixedly arranged on SDH optical transmission equipment; a relay protection professional protection device is directly connected with the light receiving module and the light emitting module on one side of the 2M optical interface board through a tail cable; and the SDH optical transmission equipment is plugged into the LC type optical fiber jack in the other side of the 2M optical interface board through a LC type optical fiber plug. The special 2M optical interface multiplexing protection channel has the advantages of realizing unified encapsulation of 2M optical signals, realizing direct connection, enhancing the channel reliability, saving investment, and makinga professional operation and maintenance interface clearer. A 2M optical interface protection channel mode is adopted, so that the flexibility in ensuring a service channel between power substationsis enhanced. The special 2M optical interface multiplexing protection channel is suitable for power optimization, new construction, emergency support and other application scenarios.

Methods of transmitting blocks of incremental redundant coded bits are provided. Methods include concatenating, using an outer encoder, bits of an input bit vector to an outer encoded bit vector thathas fewer bits than the input bit vector, wherein the outer encoded bit vector includes a mixture of information bits from the input bit vector. Methods include encoding the outer encoded bit vector into inner encoded data that is mapped to multiple data transmission channels that each include a channel reliability value. A first portion of the data transmission channels is used to transmit information bits corresponding to the outer encoded bit vector and a second portion of the data transmission channels is used to transmit frozen bits that include no information.

A method of new radio physical broadcast channel (NR-PBCH) bit mapping is proposed to improve for NR-PBCH decoding performance under Polar codes. NR-PBCH carries 32 information bits and 24 CRC bits. Specifically, NR-PBCH uses 512-bit Polar codes to carry total 56 data bits. Different Polar code bit channels have different channel reliability. As a general rule, the most reliable Polar code bit channels are used for the 56 data bits. In accordance with a novel aspect, within the 32 NR-PBCH information bits, some of the information bits that can be known to the decoders under certain conditionsand therefore are placed at the least reliable Polar code bit positions. As a result, by mapping the NR-PBCH data bits properly at the input bit positions of Polar codes, the NR-PBCH decoding performance is improved when the known bits a priori can be exploited.