摘要:
Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to estimation of an uplink channel capacity. In an aspect, provided is a method of wireless communication, which may include determining whether a current transmit time interval (TTI) is relevant for computing the uplink channel capacity estimate, determining the transmission type of the current TTI where the current TTI is relevant, determining whether data is transmitted during the current TTI, computing a data capacity value based on at least one upload channel parameter, summing the data capacity values of TTIs from a window length start TTI to the current TTI to generate a data capacity sum, computing the uplink channel capacity estimate as a ratio of the data capacity sum to a total time period of all relevant TTIs during a window length interval, and accordingly adjusting a transmission rate of output traffic.
摘要:
In one embodiment, the patent application comprises an apparatus, method and means for controlling power of an access terminal by adjusting a power of at least one secondary reverse link carrier by computing a forward link power differential, computing a reverse link power differential, and adding a power level of a primary reverse link carrier pilot with the forward link power differential and the reverse link power differential. In another embodiment, the patent application comprises an apparatus, method and means for controlling power of an access terminal by adjusting a power of at least one secondary reverse link carrier by computing a forward link power differential, computing a reverse link load differential, and adding a power level of a primary reverse link carrier pilot with the forward link power differential and the reverse link load differential.
摘要:
A system has multiple antennas, a Time Division Multiplexing (TDM) module creating TDM slots, and demultiplexing circuitry inserting within the TDM slots Orthogonal Frequency Division Multiplexing (OFDM) symbols and associating the TDM slots with data sub-streams. The system also includes precoding circuitry associating the data sub-streams with multiple tones. Each of the respective tones corresponds to a respective one of the antennas. The antennas transmit the data sub-streams using the multiple tones.
摘要:
Methods, systems, and devices are described for receive chain diversity processing in a mobile wireless device. When data is not being received at the mobile device, the diversity receive chain(s) may be disabled in order to reduce power consumed at the mobile device. The diversity receive chain(s) may be enabled/disabled according to one or more different algorithms based on idle time from the receipt and/or transmission of data. The amount of idle time that triggers the disabling of a diversity receive chain may be adaptive based on historical usage of the mobile device, or based on activity on the transmit chain of the mobile device.
摘要:
A method for processing forward link channel signals generated by a CDMA base station includes time sharing by several mobile stations of spreading codes, which are orthogonal codes such as Walsh Code, and code-combining soft/softer handoff across sectors in the mobile station active set to increase dimensions on the CDMA2000 and WCDMA downlink while minimizing intra-sector interference. Since different parts of a packet or frame are transmitted to the user by the different base stations in the active set, earlier decoding and therefore early packet termination is enabled.
摘要:
The present patent application comprises a method and apparatus to compile a superposition coded packet by compiling user candidates for superposition coding, ranking the user candidates based on a result of an evaluation function, selecting a deserving user candidate from among the user candidates, and compiling a superposition coded packet by adding other user data packets to a packet of the deserving user data packet, wherein the data packets for the user candidates may conform to a plurality of different formats and wireless communication standards.
摘要:
Techniques for rank adaptation and multiple-stream reverse link communications in a wireless access network are disclosed. A remote unit transmits one or more reverse link data streams using separate identifiers to a base station. The number of reverse link data streams may be determined according to feedback from the base station or it may be determined by testing one or more multiple-antenna transmit hypotheses. The base station may estimate channel conditions using information obtained from the one or more reverse link data streams and may determine a spatial rank of the communication channel. The remote unit may perform separate error control and power control processes for each reverse link data stream in cooperation with the base station.
摘要:
A method for use by a remote unit in an Evolution Data Optimized (EVDO) network includes sending transmissions to a base station, each of the transmissions corresponding to a respective one of multiple hypotheses of multiple antenna usage. The method also includes receiving feedback from the base station in response to the transmissions, the feedback being uninformed of multiple antenna usage and using the feedback to select at least one of the hypotheses. The method further includes transmitting data using a multiple-antenna scheme associated with the selected hypotheses.
摘要:
A method and apparatus for transmitting user data from access terminals, including receiving at each of a first subset of the access terminals a scheduling decision for an interval, the interval having a first portion and a second portion, the first portion including overhead channels; selecting at each access terminal of the first subset a mode for data multiplexing, wherein a first mode comprises building user data into the first portion of the interval using the multiplexing format; a second mode comprises building user data into at least one sub-division of the second portion of the interval, wherein each of the at least one sub-division is associated with the multiplexing format; and a third mode comprises building user data into the interval combining the first mode and the second mode; and transmitting the user data using the selected mode of data multiplexing in accordance with the scheduling decision.
摘要:
Systems and methodologies are described that facilitate identifying a plurality of keysets utilized in a communications network. The keysets can include ciphering keys that provide data encryption and decryption and integrity keys that provide data integrity protection. A key identifier can be included in a packet data convergence protocol header that indicates a keyset employed in connection with data in a protocol data unit. In addition, a route indicator can be provided in a radio link control header that distinguishes a source cell and a target cell in networks configured without RLC reset.