Abstract:
In multi-carrier wireless communications control channels are coordinated onto a single reference frequency for scheduling communications with mobile devices. Mobile devices may monitor all available control channels on a single reference frequency rather than over multiple frequencies, thereby reducing CPU processing and power consumption.
Abstract:
The present invention provides a modified assembly of the joint and the fulcrum pin comprising: a fulcrum pin (1), a joint casing shroud (2), two or more springs (3), a dustproof soft flapper (4) and a spring baffle (5). Several springs (3) are mounted between the fulcrum pin (1) and the joint casing shroud (2). The springs (3) are of the flexible distance to a certain degree, and the flexible direction is perpendicular to the axial direction of the fulcrum pin (1). The spring baffle is mounted on the end face of the fulcrum pin in order to keep the spring (3) from sliding. The invention is of higher rate of finished products, lower energy consumption, easier technique, better performance and longer life than the existing rubber assembly of the joint and the fulcrum pin.
Abstract:
Techniques for generating quality indicator bits in a wireless communication system (e.g., a cdma2000 that implements IS-2000). In one method, a determination is first made whether a good data frame was received from a first transmission for the current frame interval. This first transmission may be a non-continuous transmission on a forward dedicated control channel (F-DCCH) defined by IS-2000. If a good data frame was received, then a quality indicator bit is generated based on the good data frame. Otherwise, the quality indicator bit is generated based on a second transmission, which may comprise power control bits that are transmitted even when no data frames are sent in the first transmission. The received signal quality for the power control bits can be measured and compared against a threshold, and the quality indicator bit is then set based on the result of the comparison. The threshold may be dynamically updated.
Abstract:
A method and apparatus for decreasing the probability of dropping a call during a hard handoff procedure in a wireless communication system. The two primary functions of the candidate frequency (CF) search method and apparatus of the present invention are to detect the strong pilots on a candidate frequency in the area of the mobile station and to maintain adequate service quality during the CF search.
Abstract:
In certain communication systems, such as TD-HSDPA communications, channel quality index (CQI) reporting is based on a predetermined configuration, such as a mobile device (UE) reporting a CQI for a most recently received data transmission. This configuration may lead to errors if a UE reports a CQI for a certain data transmission but the base station (node B) believes the CQI corresponds to a different data transmission, such as a later transmission the UE never received due to an error processing control channel information. Offered is an indicator to accompany CQI reports. The indicator indicates to the node B which communication resource corresponds to the CQI report.
Abstract:
Carrier management in a wireless communication device assigned a set of two or more carriers by a wireless communication network is disclosed. In one aspect, a method of carrier management includes transmitting data over the wireless communication network on one or more carriers forming a subset of active carriers from the set of carriers assigned to the wireless communication device. A first performance metric is determined indicative of operating conditions across the set of carriers assigned to the wireless communication device. A desired number of carriers on which to transmit data based on the first performance metric is determined. The desired number of carriers on which to transmit data is compared with the number of carriers in the subset of active carriers. The subset of active carriers is dynamically adjusted based on the comparison and subsequent data is transmitted over the wireless communication network using the adjusted subset of active carriers.
Abstract:
In TDD-LTE wireless systems, an additional fourth preamble for the random access channel, called short RACH, may be used. If short RACH signaling is to be used, the random access preamble is transmitted in the uplink pilot time slot (UpPTS) field in the special subframe. The location of the uplink pilot time slot (UpPTS) is next to a downlink subframe. Therefore, interference from neighbor base stations may interfere with the short RACH preamble within the uplink pilot time slot. The interference to the short RACH will prevent the eNodeB from detecting the short RACH preamble and thus prevent the UE from accessing the network. An interference level on an Uplink Pilot Time Slot (UpPTS) may be measured and when the interference level exceeds a threshold value a User Equipment (UE) is instructed to disable short Random Access Channel (RACH) signaling. The UE may then be instructed to enable normal RACH. When the interference level falls below the threshold value the UE is instructed to resume short RACH signaling
Abstract:
Allocating transmit power among two or more carriers assigned to a wireless communication device is disclosed. In one aspect, a method of allocating transmit power includes determining a total amount of data transmit power available at the wireless communication device for data transmission over the carriers. An efficiency metric is determined for each carrier based on the carrier's transmission characteristics and a portion of the total data transmit power is allocated to each carrier based on each carrier's efficiency metric.
Abstract:
A method and apparatus for providing an improved soft handoff algorithm in a wireless communication system for third generation code division multiple access (“CDMA”) systems. The method comprises establishing communication between the wireless communication device and the at least one serving base station, the at least one serving base station having a list of at least one neighboring base station which neighbors the respective serving base station, monitoring the reverse channel signal strength at the wireless communication device from at least one neighboring base station, transmitting to a base station controller the wireless communication device signal strength detected at each neighboring base station, compiling at the base station controller a list of effective neighboring base stations from the at least one neighboring base station based on the monitored wireless communication device signal strength, transmitting the list of effective neighboring base stations to each at least one serving base station, periodically transmitting a neighboring base station list update message to the wireless communication device, the neighboring base station list update message including the effective neighboring base station list, storing the effective neighboring base station list as a neighbor set in the wireless communication device, performing forward channel signal strength searching of the neighbor set in the wireless communication device after storing the effective neighbor list as the neighbor set, and monitoring the signals from the effective neighboring base stations to accomplish a handoff between the at least one service base station and the receiving neighboring base station.
Abstract:
Aspects of radio access technology searching include apparatus and methods for obtaining relative synchronization information between a first radio access technology and a second radio access technology, and determining a time location of a pilot signal of the second radio access technology based on the relative synchronization information. Further aspects include searching for the pilot signal of the second radio access technology using the determined time location. Other aspects further include determining a measurement gap duration and measurement gap location based on the relative synchronization information so as to encompass a pilot of the second radio access technology.