Abstract:
Methods and apparatus for using a location of a mobile station (MS) and information about neighbor base stations (BSs) to assist network entry and initialization, scanning, and/or handover operations are provided. The location of the MS may be ascertained by determining the Global Positioning System (GPS) coordinates of the MS internally or by receiving the location from, e.g., a GPS device external to the MS. The information about neighbor BSs may be retrieved from a BS information database based on the location of the MS. The BS information database may reside within the MS, be broadcast periodically to the MS in an effort to update the MS's internal database, or be stored in the network operator's database. Knowledge of the MS's location and information about neighbor BSs may reduce the time spent during network entry, scanning, or handover, and thereby, power consumption; and may increase the bandwidth usage efficiency.
Abstract:
Techniques presented herein disclose handover using increased probability of the fast ranging success. Propagation delay of the RF signal transmitted from an MS to a target BS may be estimated based on a known propagation delay to a current serving BS and a relative difference in propagation delays to the current serving BS and the target BS, for example, as indicated by different receive times of preamble sequences transmitted from the current serving BS and the target BS.
Abstract:
Certain embodiments of the present disclosure provide a technique for selecting a base station during a cell re-selection process in a manner that reduces the number of location updates sent by a mobile station. The technique may include determining a set of available base stations and selecting a base station from the set of available base stations based, at least in part, on paging group identifications (PGIDs) of the base stations in the set of available base stations. By giving preference to a base station with a PGID that matches the PGID of a current serving base station, a mobile station may avoid sending a location update.
Abstract:
A method for priority-based network congestion control may be implemented by a network entity. The method may include determining one or more priorities associated with a service request that is being processed by the network entity. The method may also include determining resource availability. The method may also include determining whether to grant the service request based on the one or more priorities associated with the service request and the resource availability.
Abstract:
A method for efficiently performing ranging in a wireless communication network may be implemented by a mobile station. The method may include sending a ranging code to a base station. The method may also include receiving a ranging response message from the base station. The method may also include determining whether a ranging failure condition is satisfied. The ranging failure condition may relate to something other than a duration of time. The method may further include re-sending the ranging code to the base station if the ranging failure condition is satisfied.
Abstract:
Methods and apparatus for autonomous handover between WiMAX (Worldwide Interoperability for Microwave Access) and CDMA (Code Division Multiple Access) EVDO (Evolution-Data Optimized) or 1×RTT (one times Radio Transmission Technology, or 1×) networks during normal operation of a dual-mode mobile station (MS) are provided. The methods and apparatus may improve service continuity during handover and need not require any changes to the WiMAX or CDMA standards.
Abstract:
A method for improved decoding of hybrid automatic repeat request (H-ARQ) transmissions may include attempting to verify a physical layer (PHY) cyclic redundancy check (CRC) for a candidate H-ARQ encoder packet. If the PHY CRC is not verified, medium access control layer protocol data units (MPDUs) may be identified in the candidate H-ARQ encoder packet, and attempts may be made to verify a medium access control layer (MAC) CRC for each MPDU in the candidate H-ARQ encoder packet.
Abstract:
A method for allocating polling bandwidth may include generating polling tokens corresponding to connections maintained by a base station. The polling tokens may be generated at configurable time intervals. The method may also include assigning priorities to the polling tokens. The priority of a polling token may depend on a scheduling type of a corresponding connection. The method may also include allocating polling bandwidth to the connections that correspond to the highest priority polling tokens when uplink bandwidth is available to allocate for polling.
Abstract:
An admissions control technique improves processing capacity utilization in a token-based admission control scheme by matching token allocation to actual processing requirements. In an exemplary application, the processing capacity of a processing entity is discretely represented by a plurality of tokens. Work is admitted to the processing entity through a plurality of processing event entry points. Each of these entry points is initially allocated a share of the tokens. During each one of a succession of admission cycles, events are admitted at each entry point until that entry point's share of the tokens is exhausted. At the end of each cycle, tokens are re-allocated to the entry points for use during the next admission cycle based on the actual usage of tokens during the current cycle. An entry point's token allocation may be increased for the next cycle by re-allocating leftover tokens from other, less busy entry points.
Abstract:
A communication network node, such as a radio base station or base station controller in a wireless communication network, is configured to monitor and control ingress and egress data congestion. As such, node-based congestion monitoring provides a method of flow control between network nodes and, as such, for example, it may be used to control congestion on backhaul links between radio base stations and base station controllers, and on sidehaul links between base station controllers. In one embodiment, the node monitors egress and ingress data congestion conditions, and marks ingress data incoming to the node to indicate congestion. For example, if ingress data markings indicate ingress data congestion, the node can send signaling to initiate a reduction in the amount of data being sent to the node, e.g., a reduction in ingress data rates. If ingress data markings indicate egress data congestion, the node can reduce egress data rates.