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:
A method and system is disclosed for shifting the phase of a PN long code for access attempts by an access terminal in a wireless communication network. An access terminal may seek to acquire access from a base station that is detected by the access terminal above a threshold power level, even if the access terminal is further away from the base station than a threshold distance beyond which access is not normally granted. According to one embodiment, the access terminal will, upon determining that it is beyond the threshold distance, embed in an access request message an apparent distance that is smaller than the threshold distance, by phase-shifting a timing signal and encoding the access request message with the phase-shifted timing signal. The access terminal will then transmit the access request message on an air interface communication link to the base station.
摘要:
Methods and systems for adaptive hybrid automatic repeat request (H-ARQ) protocols are disclosed. The protocols preferably adapt to changing network conditions between a client node and an access node by omitting the transmission of certain messages when network conditions are determined to be favorable. In doing so, packets are processed faster, thus reducing communication latency as well as the memory requirements of the protocols. One scenario in which the protocols may operate is where the client node is a wireless communication device coupled to the access node via a wireless network. In such a scenario, the access node may, from time to time, measure a quality of the wireless air interface between the client node and the access node, and determine whether to transmit an acknowledgement message based on the outcome of the measurement as compared to a threshold value.
摘要:
Disclosed herein is a method for improved paging in a wireless communication system. In a scenario where base stations broadcast congestion indicators to prevent mobile stations from registering in coverage areas that are experiencing threshold congestion, the method provides for a new form of zone based paging that accounts for the possibility that a mobile station has entered into a new zone but has not yet registered due to a threshold congestion state. According to the method, a paging attempt will be directed to the mobile station's zone of last registration and to only those coverage areas in at least one adjacent paging zone that are deemed to be experiencing threshold congestion.
摘要:
A controller monitors resource usage in each of a plurality of sectors and identifies any sector with resource usage that exceeds a threshold value as a high usage sector. The controller evaluates the mobile stations in its area and identifies any mobile station that is using a high usage sector and at least two other sectors for a communication session as a candidate mobile station. The controller applies a predictive algorithm to determine whether any candidate mobile station is able to continue its respective communication session without using its respective high usage sector. In this determination, the signal levels that a mobile station reported for the sectors in its active set, other than the high usage sector, may be used to calculate a combined signal level. If the combined signal level exceeds a predefined value, the mobile station is instructed to drop the high usage sector.
摘要:
A wireless communication system uses a series of repeating overhead time cycles that each comprise a plurality of time slots. The system exchanges overhead information with wireless communication devices during individual time slots. The communication system wirelessly receives a registration request for wireless communication service from a wireless communication device. The communication system processes loading information for the overhead time cycles or a quality of service level of the wireless communication device to assign the wireless communication device to one of the overhead time cycles. The communication system wirelessly indicates the assigned overhead time cycle to the wireless communication device. The communication device monitors the overhead time slots during the assigned one of the overhead time cycles and does not monitor the overhead time slots during the not assigned overhead time cycles.
摘要:
A wireless communication device determines a latitude indicator, longitude indicator, and received signal strength for its current location. The devices processes the latitude indicator, longitude indicator, and received signal strength to estimate its elevation at the location. The device also processes its handover history to determine a handover probability factor. The device then processes the estimated elevation and handover probability factor to estimate if the device is located in a building above an elevation level. If the estimate indicates that the device is located within the building above the elevation level, then the device modifies a handover parameter to inhibit handover attempts.
摘要:
What is disclosed is a method of operating a wireless communication system, wherein a series of repeating overhead time cycles each comprise a plurality of time slots, and wherein the wireless communication system exchanges overhead information with wireless communication devices during individual ones of the time slots. The method includes assigning one of the overhead time cycles to one of the wireless communication devices, wherein the one of the wireless communication devices monitors the overhead time slots during the assigned one of the overhead time cycles and does not monitor the overhead time slots during the non-assigned overhead time cycles. The method also includes exchanging user communications with the wireless communication devices, monitoring loading information for the overhead time cycles, and monitoring movement information of the one of the wireless communication devices. The method also includes processing the loading information for the overhead time cycles and the movement information of the one of the wireless communication devices to assign the one of the wireless communication devices to another one of the overhead time cycles, and wirelessly indicating the other assigned one of the overhead time cycles to the one of the wireless communication devices.
摘要:
Air interface protocols under the numerous wireless communication standards allow use of a quick-paging channel (QPCH) to expedite paging and call setup. When a hybrid mobile device is engaged in wireless communications under a first air interface protocol, it may periodically switch over to a second air interface protocol to check for pages on the slower standard paging channel (PCH). To increase throughput under the first air interface protocol, it would be useful to employ the QPCH under the second air interface protocol, to reduce time spent by hybrid device checking for pages under the second air interface protocol. However, the QPCH uses resources under the second air interface protocol, so it would be best to not have the QPCH activated at all times. According to the invention, the system would activate the QPCH under the second air interface protocol in response to there being more than an upper threshold number of hybrid devices active under the first air interface protocol. In turn, the system may deactivate the QPCH under the second air interface protocol in response to there being some lower threshold number of hybrid devices active under the first air interface protocol.
摘要:
A mobile station will sort wireless coverage sectors in order of distance of the sectors from the mobile station, and the mobile station will then scan for pilot signals from the sectors in the sorted order. The invention can be applied advantageously to provide an order of scanning remaining set sectors in a mobile station operating according to a code division multiple access protocol.