摘要:
A method in a network node in control of a cell in a cellular telecommunication network for reducing intra-cell interference between user equipments (UE) residing in said cell and performing random access (RA). The method comprises the steps of arranging groups of preamble sequences where the sequences within each group are orthogonal to each other, assigning one such group to the cell, from which group the UEs performing RA randomly selects a preamble, and assigning one or more additional group(s) of preamble sequences to said cell if the RACH or traffic load exceeds a certain threshold. The invention further relates to a radio network node in a cellular telecommunication system, capable of carrying out said method.
摘要:
An electronic communication device includes a high-rate RF wireless transmitter circuit (e.g., a TransferJet transmitter circuit) and a low-rate magnetically coupled receiver circuit (e.g., a Near Field Communication receiver circuit). The high-rate RF wireless transmitter circuit transmits a block of data to another proximately located communication device via RF signals using a first RF communication protocol. The low-rate magnetically coupled receiver circuit receives a communication control signal from the other proximately located communication device via magnetic coupling thereto using a second protocol that is different from the first RF communication protocol, and responds to the communication control signal by selectively triggering the high-rate RF wireless transmitter circuit to transmit another block of data when available for transmission.
摘要:
This disclosure relates to frequency hopping (FH) communication systems, such as Bluetooth. In particular, it relates to a substantially automatic recovery procedure for re-establishing a previously lost link or connection between a master unit and a slave unit in a frequency hopping communications system. Some embodiments of the disclosed invention relates to methods for recovery of a previously lost link or connection between two Bluetooth units in a Bluetooth Sniff mode.
摘要:
A device may include logic to enter a power savings mode and wirelessly transmit a first synchronization packet to a remote device within a first transmission time slot in a first power savings cycle, the first synchronization packet including a code that is a member of a set consisting of a predetermined number of codes. In addition, the logic may be configured to sleep after transmitting the first synchronization packet to save energy, awake at a first receive time slot in the first power savings cycle, and receive a reply synchronization packet, the reply synchronization packet including a code is that is a member of the set from the remote device. The logic may be further configured to sleep until a start of a second power savings cycle that follows the first power savings cycle to save energy.
摘要:
An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
摘要:
Some embodiments of the present invention are directed to methods of operating communication terminals. A wireless communication link is established between first and second communication terminals and communication signals are exchanged therebetween. The first communication terminal is controlled to continue over time to increase a power level at which it transmits communication signals to the second communication terminal in response to detecting loss of the wireless communication link and while continuing attempts to reestablish the communication link with the second communication terminal. The first communication terminal is further controlled, in response to detecting loss of the communication link, to increase a level of attenuation that it applies to communication signals from the second communication terminal, and to then more gradually decrease the level of attenuation over time in response to continuing attempts to reestablish the communication link with the second communication terminal.
摘要:
A first transceiver in a packet-based communications system is operated to achieve efficiencies. The transceiver comprises a receiver and a transmitter for bidirectionally communicating with a second transceiver. In various embodiments, data and control traffic scheduling enables several unrelated items to be bundled during single transmission and/or reception instances. In one aspect, receiver operation involves receiving a first signal from the second transceiver, the first signal requiring that return link information be sent to the second transceiver. A period of time during which the first transceiver can begin a bundled transmission of the return link information and initiating link information that is unrelated to the information carried by the first signal is determined. The bundled transmission of the initiating and return link information is begun during the determined period of time. Application of power sufficient to support reception and/or transmission can be limited to only when those components are used.
摘要:
Embodiments include a method of communicating an audio stream from an audio source terminal to a plurality of speaker terminals. A broadcast channel is established for communication from an audio source terminal to a plurality of speaker terminals. A plurality of bidirectional point-to-point control channels are established for controlling wireless communications between the audio source terminal and the speaker terminals, where each of the point-to-point control channels interconnect the audio source terminal and a different one of the speaker terminals. An audio stream is transmitted as a sequence of blocks of audio data in messages from the audio source terminal through the broadcast channel for receipt by all of the speaker terminals. A quality of reception feedback message is received at the audio source terminal from individual ones of the speaker terminals through respective ones of the point-to-point control channels. The audio data messages are adapted for transmission from the audio source terminal through the broadcast channel in response to the quality of reception feedback message.
摘要:
A first device in a short-range wireless piconet self-learns a multi-frame piconet pattern that is used by a second device as a result of a deferral that reduces or avoids simultaneous transmission and reception by two transceivers at the second device. The first device uses this self-learned multi-frame piconet pattern to selectively control transmitting and receiving by the first device. Power can thereby be conserved at the first device. Related devices, networks and methods are described.
摘要:
A method in a network node in control of a cell in a cellular telecommunication network for reducing intra-cell interference between user equipments (UE) residing in said cell and performing random access (RA). The method comprises the steps of arranging groups of preamble sequences where the sequences within each group are orthogonal to each other, assigning one such group to the cell, from which group the UEs performing RA randomly selects a preamble, and assigning one or more additional group(s) of preamble sequences to said cell if the RACH or traffic load exceeds a certain threshold. The invention further relates to a radio network node in a cellular telecommunication system, capable of carrying out said method.