Abstract:
Methods and an apparatus are provided for providing handoff information to a candidate mobile node initially served on a first carrier. The candidate mobile node may inform a wireless-communication network that hard-handoff criteria are met for the first carrier. The network may identify a plurality of neighboring mobile nodes served on a second carrier and within a threshold distance of the candidate. The network may receive a measurement of forward-link signal quality of the second carrier from each neighboring mobile node. Using the received forward-link-signal-quality measurements, the network may estimate the forward-link signal quality of the second carrier at the location of the candidate mobile node. If that estimated forward-link signal quality exceeds a signal-quality threshold, the network may provide hard-handoff information about the second carrier to the candidate mobile node.
Abstract:
Exemplary methods and systems for paging a mobile station are disclosed herein. An exemplary method involves: (i) before transmission of a page to a mobile station by an access network, the access network (a) determining a page-type of the page to the mobile station; (b) based at least in part on the page-type, determining whether to disable or enable page-concatenation for the page; and (c) if concatenation is enabled, then concatenating the page, and otherwise refraining from concatenating the page; and (ii) the access network transmitting the page to the mobile station. In an exemplary embodiment, determining the page-type of the page may involve determining whether the page is a voice-service page or a data-service page and/or determining whether or not the page is an intersystem page. Further, concatenation may be enabled if the page is a voice-service page, and disabled if the page is a data-service page. Yet further, concatenation may be disabled if the page is an intersystem page (preferably regardless of whether the intersystem page is a voice-service or data-service page).
Abstract:
Exemplary methods and systems are disclosed herein that may, among other benefits, help a mobile station to conserve power by intelligently determining how often to scan for incoming pages. An exemplary method may be carried out by a mobile station that has most-recently registered with a radio access network in a zone of last registration, and involves the mobile station (a) determining a location of the mobile station in relation to the zone of last registration, (b) using the location of the mobile station in relation to the zone of last registration as a basis for determining a scan period to wait between scans of the paging channel; and (c) periodically scanning the paging channel according to the determined scan period. Furthermore, an exemplary method may be carried out in order to conserve battery power when a mobile station determines that its battery power is low.
Abstract:
Disclosed herein are methods and systems that may, among other possible benefits, help an access network to more quickly re-assign a forward traffic channel. An exemplary method involves an access network: (i) making a determination that a forward traffic channel is invalid, wherein the forward traffic channel is initially assigned to a first access terminal; and (ii) in response to the determination that the forward traffic channel is invalid: (a) after sending a first configuration message indicating that the forward traffic channel is invalid, waiting for at least a predetermined wait period before sending a second configuration message indicating that the forward traffic channel is valid; and (b) before the predetermined wait period has ended, making the forward traffic channel available for re-assignment to a second access terminal.
Abstract:
Disclosed herein are methods and systems that may help a radio access network to more intelligently determine an initial transmit power to use for forward-link communications with a mobile station. An exemplary method involves a radio access network: (a) receiving a page response message, wherein the page response message indicates that a page to a mobile station operating in a radio access network has been received by the mobile station; (b) responsive to receiving the page response message, determining an attempt count for the mobile station, wherein the attempt count indicates how many attempts to page the mobile station have been made; (c) using the attempt count as a basis for determining an initial transmit power for forward-link communications with the mobile station; and (d) initiating forward-link communications with the mobile station at the determined initial transmit power.
Abstract:
Methods and systems are disclosed herein that may help to improve the paging success rate for hybrid mobile stations, which in turn may help to prevent dropped calls. An exemplary method for paging an access terminal involves an access network: (a) before transmission of a page to an access terminal, determining whether or not the access terminal is a hybrid access terminal; (b) if the access terminal is not a hybrid access terminal, then selecting standard page settings for the page; (c) if the access terminal is a hybrid access terminal, then selecting adjusted page settings for the page, wherein the adjusted page settings increase the probability that the access terminal will successfully receive the page; and (d) applying the selected page settings and transmitting the page. To help increase the probability that the access terminal will successfully receive the page, the adjusted page settings for the page may involve setting that reduces or disables concatenation of the page and/or an increased page-transmission power.
Abstract:
Methods and apparatus are provided for adjusting a forward-link power-control step size. An initial active set of coverage areas for a mobile station is maintained within which a first coverage area in the initial active set has a signal strength that is stronger than that of each of the other coverage areas in the initial active set. The first coverage area is determined to have dropped from the initial active set, resulting in a modified active set. In response, a signal-strength factor is calculated based on (a) a last non-zero signal-strength measurement of the first coverage area and (b) a second value. One or more forward-link power-control step sizes is selected based on at least the calculated factor. The one or more selected step sizes is used to increase the forward-link transmission power of at least one coverage area in the modified active set.
Abstract:
Exemplary methods and systems are disclosed herein that may help to prevent pages to the same mobile station from being repeatedly shed in order to send overhead messages. An exemplary method may involve a base station: (a) detecting a page-shedding event; (b) in response to detecting the page-shedding event, adjusting a maximum period between overhead-message transmissions; and (c) transmitting at least one overhead message according to the adjusted maximum period between overhead-message transmissions. A page-shedding event typically involves an overhead message being sent in a given paging-channel slot instead of a page that was previously scheduled for the given paging-channel slot. Preferably, in order that a page is not repeatedly shed in the same slot during the slot cycle, the maximum period between overhead-message transmissions may be adjusted such that the slot cycle duration is not a multiple of the maximum period.
Abstract:
Disclosed herein are methods and systems that may take advantage of unused space in general page messages (GPMs) by including multiple instances of a given page in the same GPM, in an effort to improve the chances that the intended mobile station receives the page. An exemplary paging method involves: (a) before a transmission of a general page message (GPM) that is formatted to include up to a maximum number of page records, making a determination that less than the maximum number of page records are scheduled to be included in the GPM; (b) in response to the determination, selecting, from the page records that are scheduled to be included in the GPM, at least one page record for which to include two or more instances in the GPM; and (c) transmitting the GPM, wherein two or more instances of the at least one selected page record are included in the transmission of the GPM.
Abstract:
Methods and systems are disclosed herein that may help to increase the paging success rate, among other benefits. An exemplary method involves a radio access network: (a) detecting a page-shedding event, wherein the page-shedding event comprises an overhead message being sent in a first paging-channel slot instead of a page to a mobile station that was previously scheduled for the first paging-channel slot; (b) in response to detecting the page-shedding event, the radio access network determining whether or not it is a last attempt to send the page that was previously scheduled for the first paging-channel slot; (c) if it is not the last attempt, the radio access network scheduling a next attempt to send the page according to a standard scheduling procedure; and (d) if it is the last attempt, the radio access network rescheduling the last attempt to send the page according to an alternate scheduling procedure.