摘要:
A mobile station receives a target pilot signal transmitted by a target transmitter in a spread spectrum communication system and measures its phase. The mobile station then defines a search window to search for the target pilot signal at a later time. The mobile station defines the center point of the search window based on the previously-measured phase and the mobile station's direction of motion and speed relative to the target transmitter. If the mobile station is moving toward the target transmitter, the center point is less than the previously-measured phase by an adjustment amount. If the mobile station is moving away from the target transmitter, the center point is greater than the previously-measured phase by an adjustment amount. The adjustment amount may depend on the mobile station's speed. After the search window is defined, the mobile station uses the search window to search for the target pilot signal.
摘要:
A method for selecting a wireless coverage sector to serve a mobile station, such as in response to a handoff request that designates a sector-identifier that represents two or more possible sectors. A serving radio access network (RAN) may identify potential sectors in the region and may then select the sector whose azimuth is closest to the geographic bearing of the mobile station from the sector's base station. Further, in the event of a tie between two or more sectors or in other circumstances, the RAN may also take into consideration how close the mobile station is to various base stations, such as selecting the sector to whose base station the mobile station is closest. In a system that uses neighbor lists to govern handoff, the invention can help to facilitate handoff in a scenario where a mobile station requests handoff to a sector not listed in the mobile station's neighbor list.
摘要:
A method and apparatus for selecting channel elements in a wireless communication system based on their performance history. Data is collected indicating the performance of various channel elements over time, preferably eliminating from consideration any performance degradation due to air interface (e.g., radio frequency) issues. The data is then used to sort the channel elements in a priority order, from best-performing to worst-performing. When a channel element is to be selected for use in connection with an air interface channel (e.g., traffic channel or control channel), the channel element is then selected in accordance with the priority order, such as by selecting the channel element that has performed best over time. The priority-based selection of channel elements can thus leave poor-performing channel elements for use as a last resort, which can be advantageous in times of heavy network loading for instance.
摘要:
A method and system is disclosed for maintaining codec consistency across a communication session. When a communication session is set up for an access terminal (AT) operating in a wireless communication system, a network device, such a base station, can determine a coding rate to assign the AT for its air interface in a manner that accounts for network capacity variations spatially and/or temporally across the session. If the requested communication session is determined to be with a landline device, then a higher coding rate may be used than might otherwise be selected. If the requested session is with another AT, then a coding rate that best accommodates the air interfaces of both ATs may be used. If the AT is predicted to handoff to multiple sectors during the session, then a coding rate that best accommodates the air interfaces of all the predicted handoff sectors may be used.
摘要:
A wireless communication device comprises a wireless communication transceiver and a processing system. The wireless communication transceiver is configured to detect first and second frequencies transmitted from a wireless access node and to receive first and second threshold values transmitted from the wireless access node. The processing system is configured to determine a distance between the wireless communication device and the wireless access node, compare the distance to the first threshold value, and if the distance falls below the first threshold value, select the first frequency. The processing system is further configured to compare the distance to the second threshold value, and if the distance exceeds the second threshold value, select the second frequency. The wireless communication transceiver is configured to exchange wireless communications with the wireless access node using the selected frequency.
摘要:
An access terminal in a coverage area of an access network may be monitoring a level of loading on the coverage area's reverse link, such as by monitoring a series of reverse activity bits sent by the access network. The access terminal may then detect new data for transmission to the access network and responsively select a reverse-link data rate based on the monitored level of loading. In this respect, the access terminal may select (a) a first data rate (e.g., a reverse-link data rate at which the access terminal last transmitted data) if the access terminal detects a low load, and (b) a second data rate (e.g., a minimum available reverse-link data rate) if the access terminal detects a high load, where the second data rate is lower than the first data rate. The access terminal may also consider its location in selecting the reverse-link data rate.
摘要:
What is disclosed is a method of operating a wireless access system. The method includes exchanging wireless communications with a plurality of user devices using a first transmit diversity configuration, receiving multipath information from the user devices for the wireless communications, and processing the multipath information to determine a second transmit diversity configuration. The method also includes transferring an indicator of the second transmit diversity configuration to the user devices, and exchanging further wireless communications with the user devices using the second transmit diversity configuration.
摘要:
Methods and systems for dynamically adjusting the page-concatenation level based on RF conditions being experienced by a mobile station are disclosed herein. An exemplary method involves (i) determining that a mobile station should be paged, wherein the mobile station is operating in a coverage area of an access network; and (ii) in response: (a) using at least one indication of RF conditions for the mobile station as a basis for selecting a page-concatenation level for a page to the mobile station; and (b) transmitting the page to the mobile station, wherein the page is transmitted in a page message having the selected page-concatenation level. In an exemplary embodiment, the indication of RF conditions may be a determination that a mobile station is located near the border of a coverage area, which is made based on an elapsed time since the mobile station's last-received registration message.
摘要:
A method and system is disclosed for dynamically adjusting a signal-to-noise (SNR) bias based on relative load between a macro type base station and a micro type base station of a wireless communication system. The SNR bias corresponds to a threshold differential SNR between SNRs of the macro base station and of the micro base station, wherein the SNR bias is configured to be provided to an access terminal (or user equipment) to cause the access terminal (i) to be biased to seek service from the micro base station if the access terminal detects an SNR from the micro base station that is less than the threshold differential SNR below an SNR that the access terminal detects from the macro base station, and (ii) to be biased to seek service from the macro base station otherwise. Once the SNR bias is determined based on the relative load, it is communicated to one or more access terminals.
摘要:
What is disclosed is a method of operating a wireless access system. The method includes exchanging wireless communications with a plurality of user devices using a first communication mode that uses a first frequency spectrum and a second communication mode that uses a second frequency spectrum. The method also includes transferring a first bit sequence using the first communication mode to a first set of the user devices to indicate the presence of first pages pending on a paging channel portion of the first communication mode. The method also includes transferring a second bit sequence using the second communication mode to a second set of the user devices to indicate the presence of second pages pending on a paging channel portion of the second communication mode, where the second set of the of user devices tune away from the first communication mode to the second communication mode to receive the second bit sequence. The method also includes configuring a third set of the of user devices to tune away from the first communication mode to the second communication mode to check for the presence of third pages pending on the paging channel portion of the second communication mode.