摘要:
In one embodiment, a plurality of data rates available for communication is identified at a first device in a network. Slots of a channel hopping schedule are also identified and the data rates are assigned to the slots of the channel hopping schedule to generate a data rate hopping schedule. The generated data rate hopping schedule is further provided to a second device in the network.
摘要:
The invention relates to a communication system and a method of maintaining audio communication in a congested communication channel currently bearing the transmission of speech in audio communication between a sender side and a receiver side, the communication channel having at least one signaling channel and at least one payload channel having a quality of service. During the audio communication the quality of service of the payload channel is monitored. If the quality of service of the payload channel is below a threshold the speech at the respective sender side is converted to text; and transmitted over the retained communication channel to the respective receiver side. The text may be converted back to speech at the receiver side.
摘要:
A communication system includes an iterative multi-stage decoder (170) that may be dynamically configured to achieve a particular bit-error-rate. In one embodiment, a circuit comprises a first decoder block (158) and a second decoder block (159) to decode data received over a communication channel. A control circuit (171 ) may change a number of iterations performed by the decoder blocks (158, 159) to decode received data based on a specified bit error rate and a detected signal-to-noise ratio of the received data. The number of computational units (160, 161 ) used in the decoder blocks may be changed dynamically to achieve desired system performance. In one embodiment, resources are allocated based on a system initiating the connection. Programmable circuits are used in some embodiments to reconfigure the multi- stage decoder.
摘要:
A method and system that provides enhanced link adaption in 802.11ac wireless network standard that supports Multi User-Multiple Input Multiple Output (MU-MIMO) operation in the downlink is disclosed. The method provides changes in station (STA) to Access Point (AP) feedback elements of the 801.11ac standard. These changes enable the AP to select optimal Modulation and Coding Scheme (MCS) levels to match channel and interference conditions by maintaining desired Packet Error Rate (PER). The method enables each co-scheduled station to indicate a SINR step size that enables the AP to derive optimal MCS level based on computed multi-user interference after deriving the multi-user (MU) precoder. The method further enables joint STA selection and link adaptation that appropriately minimizes transmitted power or maximizes data rate.
摘要:
본 발명은 통신 시스템에서 패킷 송수신 장치 및 방법에 관한 것으로, AL-FEC(Application Layer Forward Error Correction)로 보호되는 적어도 하나의 MMT(MPEG Media Transport) 에셋을 결정하는 과정과; 상기 적어도 하나의 MMT 에셋을 전송하기 위한 적어도 하나의 FEC 플로우를 결정하는 과정과; 상기 적어도 하나의 FEC 플로우 각각에서 전송되는 MMT 에셋을 결정하고, 상기 적어도 하나의 FEC 플로우에 적용하기 위한 FEC 코딩 구조를 결정하는 과정과; 상기 적어도 하나의 FEC 플로우에서 전송되는 상기 MMT 에셋을 전송을 위한 단위로 나누어 적어도 하나의 소스 플로우를 생성하는 과정과; 상기 FEC 코딩 구조에 따라 상기 적어도 하나의 소스 플로우에 AL-FEC 인코딩을 수행하여 적어도 하나의 패리티 플로우를 생성하여 전송하는 과정을 포함하는 패킷 송신 방법을 제공한다.
摘要:
A method and apparatus for transmitting and receiving a Service Specific Scheduling Control Header (SSSCH) in a wireless communication system are provided, in which the SSSCH includes SSSCH type information and a Quality of Service (QoS) parameter change indicator. The SSSCH type information indicates at least one of a QoS parameter set change request, an ACKnowledgment (ACK) for a QoS parameter set change request, and a Negative ACK (NACK) for a QoS parameter set change request, and the QoS parameter change indicator indicates whether a QoS parameter set will be changed.
摘要:
A receiver and method for receiving and processing a sequence of transmitted symbols in a digital communication system utilizing soft pilot symbols. A set of soft pilot symbols are transmitted with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16QAM or 64QAM. The receiver knows the modulation type and location (time/frequency/code) of the soft pilot symbols, and demodulates them first. The receiver uses the demodulated soft pilot symbols as known symbols to estimate parameters of the received radio signal. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols.