摘要:
An exemplary infrared control system includes an infrared control unit and a computer. The infrared control unit is capable of transmitting an infrared signal. The computer includes an infrared response unit, and the infrared response unit includes an infrared receiving circuit and a control circuit electrically connected to the infrared receiving circuit. The infrared receiving circuit is capable of receiving the infrared signal from the infrared control unit. Accordingly the control circuit is capable of processing the infrared signal from the infrared receiving circuit to generate a corresponding command signal to control the computer to power on/off or reset.
摘要:
In wireless system, a group of Base station (BTSs) with smaller footprints have the capability to communicate with each other as well as with the BTSs with relatively larger footprints via wireless air-interfaces. One of such example is coordinated cell systems. A coordinated cell system comprises a group of coordinated cell base stations that have the capability to communicate with each other as well as with relevant macro cell or Pico cell base stations via wireless air-interfaces. Each coordinated cell BTS consists of an over the air control unit in addition to the conventional coordinated cell BTS system. A set of protocols in the form of messages and database are also defined to enable the networking capability. This enables enhancement in performing a variety of tasks by coordinated cell systems, including interference management and coordination, registration and authentication, quality of service coordination, installation and maintenance, location services, etc.
摘要:
Base stations with coordinated multiple air-interface operations are provided. In some embodiments, multi-mode base station (BTS) systems operate with different air-interfaces, functionality, or configurations in a coordinated manner. For example, typical applications of such systems can include Macrocell BTS, Picocell BTS, Femtocell BTS, or Access Point (AP), Set Top Box (STB), or Home Gateway, Hot Spot Devices, User Terminal with the capability to perform required base station operations. In some embodiments, various techniques are provided for system improvements and optimizations via radio resource management, including user and system throughput optimization, QoS improvement, interference management, and various other improvements and optimizations. In some embodiments, a system (e.g., a multi-mode device, such as a base station, a repeater, and/or a terminal) includes a multi-mode communication unit, in which the multi-mode communication unit allocates access for communication using at least two modes; and a processor configured to implement at least in part the multi-mode communications unit. In some embodiments, the at least two modes include one or more of the following: frequency band, protocol standard, duplexing format, broadcast mode (e.g., television broadcast and/or a radio broadcast), and one-way communication mode.
摘要:
Systems and methods for implementing and designing protocols in such communications systems which can be wireless or wired. The systems and methods can include fundamental changes in the traditional protocol design approaches with their constraints of one-to-one mapping in protocols. By doing so, embodiments of the present invention enable an efficient way to design and implement a system to support single or multiple protocols.
摘要:
A Hybrid Automatic Retransmission Request (H-ARQ) technique is provided for Multi-Input Multi-Output (MIMO) systems. The technique changes the basis (V) upon retransmission, which helps reduce the error probability upon retransmission. This basis hopping technique provides for improved performance gain without significant increase in design complexity. In one embodiment, communication device (100) includes a receiver section (114) for receiving an acknowledgment (ACK) or a non-acknowledgment (NACK) signal in response to information transmitted by the transmitter section of the communication device. If a NACK is received, a new basis is selected from a set of basis stored in a basis set unit (110). The new basis that is selected is then used by a linear transformation unit (106) in the retransmission of the information.
摘要:
In wireless system, a group of Basestations (BTSs) can be managed by a centralized network management identity or can be self-organized by communicating with each other via wireless air-interfaces or wired interfaces. One such example are Femtocell systems. When the BTSs are using the same frequency for transmitting and receiving with relatively large transmitting power and when they are closer to each other, performance of such a system and user throughput or QoS (Quality of Service) gets degraded due to the interference between the BTSs and among the users. Smart antenna technique can be used in a coordinated way among a group of BTSs, such as Femtocells, to avoid or reduce interference or manage how interference happens to achieve performance enhancement such as higher system throughput or better QoS to individual applications.
摘要:
System and method for signaling control information in a multi-carrier communications system to transmit data. A preferred embodiment comprises demodulating a first carrier that is used for transmitting a control channel transmission, determining a second carrier that is used for transmitting a data channel transmission based upon the demodulated control channel transmission, and demodulating the second carrier to obtain the data channel transmission. Additionally, designs for multi-carrier receivers are provided.
摘要:
Dual mode radio for frequency division duplexing and time division duplexing communication modes. In some embodiments, dual mode radio for frequency division duplexing and time division duplexing communication modes includes a multi-mode communication unit for wireless communication, in which the multi-mode communication unit allocates access for a time based communication mode and a frequency based communication mode; and a processor configured to implement at least in part the multi-mode communication unit. In some embodiments, the time based communication mode includes a time division duplexing (TDD) communication mode, and the frequency based communication mode includes a frequency division duplexing (FDD) communication mode.
摘要:
Transmit diversity (TD) has become a common technique used in modern wireless communications systems to improve performance. TD uses multiple antennas (e.g., 110 and 111) at a transmitter (e.g., 105) to transmit multiple encoded datastreams and a single (or multiple) antenna (e.g., 116) at a receiver (e.g., 115) to receive the datastreams. Preferred embodiments of the present invention provide a general architecture (e.g., 705) that can support different TD schemes and even non-TD, simplifying receiver design and minimizing hardware usage.
摘要:
A Hybrid Automatic Retransmission Request (H-ARQ) technique is provided for Multi-Input Multi-Output (MIMO) systems. The technique changes the basis (V) upon retransmission, which helps reduce the error probability upon retransmission. This basis hopping technique provides for improved performance gain without significant increase in design complexity. In one embodiment, communication device (100) includes a receiver section (114) for receiving an acknowledgment (ACK) or a non-acknowledgment (NACK) signal in response to information transmitted by the transmitter section of the communication device. If a NACK is received, a new basis is selected from a set of basis stored in a basis set unit (110). The new basis that is selected is then used by a linear transformation unit (106) in the retransmission of the information.