Abstract:
Disclosed herein are methods and systems that may help a WiMAX base station function without a GPS signal by providing a high-stability reference signal via a subcarrier of a broadcast signal, such as an FM radio signal. An exemplary broadcast station may therefore be configured to phase-lock a subcarrier signal to a GPS signal, and include this subcarrier in its broadcast signal, thereby providing the subcarrier signal for use by a base station as a high-stability reference signal for local-oscillator stabilization at the base station. The broadcast station may further modulate a timing signal onto the subcarrier signal. An exemplary base station may therefore receive the broadcast signal, decode the broadcast signal to acquire the subcarrier signal, and use the subcarrier signal to stabilize its local oscillator, rather than using a GPS signal. The base station may further demodulate the subcarrier to acquire the timing signal, which the base station may use for frame-start synchronization, instead of a GPS signal.
Abstract:
System and methods for switching operating modes of a radio access node to increase data throughput for a user-equipment device are described. The radio access node can detect operating conditions to trigger switching from one operating mode to another. In a first operating mode, the radio access node can transmit non-bearer data, such as synchronization signals, to a UE device using a particular forward-link air interface resources. In response to detecting the defined condition(s), the radio access node can switch to a second operating mode in which the radio access node begins transmitting bearer data using the particular forward-link air interface resources used to transmit the non-bearer data while operating in the first operating mode. Upon detecting other operating condition(s), the radio access node can switch back to operating in the first operating mode. The radio access node can be configured as an eNodeB.
Abstract:
A radio access network (RAN) may receive a call setup request from a wireless communication device (WCD). The call setup request may indicate that the WCD supports a first media codec. The RAN may obtain a set of candidate wireless coverage areas for serving the WCD. A first subset of the candidate wireless coverage areas may support the first media codec, and a second subset of the candidate wireless coverage areas might not support the first media codec. The RAN may assign traffic channels to the WCD, such that the assigned traffic channels include traffic channels from at least two of the first subset of the candidate wireless coverage areas, but do not include traffic channels from any of the second subset of the candidate wireless coverage areas. The RAN may communicate with the WCD substantially simultaneously via the assigned traffic channels using the first media codec.
Abstract:
A RAN may determine a metric indicative of a prevalence of WCDs of a first type served by the RAN. WCDs of a second type may also be served by the RAN. WCDs of the first type may communicate with the RAN using a first air-interface or a second air-interface, and WCDs of the second type may communicate using the second air-interface. The RAN may engage in a first extent of communication with WCDs of the first type or the second type when using the second air-interface. The RAN may compare the metric to a threshold WCD prevalence, and based on the comparison, select a second extent of communication to engage in with WCDs of the first type or the second type. The RAN may receive a call setup request related to a particular WCD, and select at most the second extent of wireless coverage areas for the particular WCD.
Abstract:
A method and system is disclosed for coordinating codec assignment and radio configuration in wireless communication sessions. 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 radio configuration in a wireless coverage zone of the base station. The base station could use a distribution of types of cover codes in use to monitor radio configuration, and then assign a codec and coding rate for new calls based on the distribution.
Abstract:
Quality of Service (QoS) priority values and thresholds are defined for various service types assignable to user equipment (UE devices) including multiple bandclass devices. The QoS thresholds can be used for determining whether resources of a default or alternate bandclass should be used for a new call request or whether a timer should be initiated to wait for additional resources to become available. A default QoS priority values can be assigned to each service type and used for voice calls requested by UE devices. QoS priority values with lower priority can be used for data calls. The priority of priority values can decrease as the data rate for the data calls increases. Thresholds for blocking call requests can be increased or decreased to improve likelihood that resources for call requests with higher priority service types are granted at the expense granting resources for call requests with lower priority service types.
Abstract:
A method and system for selecting a coverage area in which a given mobile station should operate. The system will receive user ratings of call quality per coverage area. The system will then use the received user ratings as a basis to select a coverage area in which the given mobile station should operate. The system will then cause the given mobile station to operate in the selected coverage area. By using these user ratings as a basis to select a coverage area in which the given mobile station should operate, the system can help improve call quality overall for users, thus increasing user satisfaction with wireless performance.
Abstract:
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 across the session. 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, but that does not result in consistently low coding rates for the AT, may be used.
Abstract:
A downlink resource block in an orthogonal frequency division multiplexing (OFDM) communication system can be shared among multiple wireless communication devices (WCDs) by assigning one or more orthogonal codes to each WCD. To transmit data to the WCDs using the downlink resource block, a base station may receive a data stream that includes respective data for each of the WCDs and encode each WCD's respective data with a respective orthogonal code assigned to that WCD to generate an encoded data stream. An OFDM transmitter in the base station may receive the encoded data stream and transmit the encoded data in the form of OFDM symbols in the downlink resource block. A WCD can receive the downlink resource block, recover the encoded data from the OFDM symbols, and use the one or more orthogonal codes assigned to it to recover the data for that WCD from the encoded data.
Abstract:
The described systems and methods allow for safer operation of a wireless communication device (WCD). The methods may be carried out at the WCD or at a wireless-communications network that interfaces to the WCD. A hands-free-audio (HFA) profile associated with the WCD may be set to enabled or disabled. A speed-condition of the WCD is determined and compared to a speed-threshold. If the speed-condition is greater than the speed-threshold and the HFA profile is enabled, then the WCD is operable to engage in wireless communications (e.g., voice calls or text messaging) via an HFA device associated with the WCD. If the speed-condition is greater than the speed-threshold and the HFA profile is set to disabled, then the WCD may prevent and/or postpone wireless communications from occurring. After the speed-condition is determined to be less than the speed-threshold, previously received communications (e.g., text messages) may be presented via the WCD.