Abstract:
When a base station that does not support downlink beamforming is serving a UE and a guaranteed-bit-rate (GBR) bearer is established for the UE, the base station will detect the establishment of the GBR bearer for the UE and will responsively trigger handover of the UE to another base station selected based on the other base station supporting downlink beamforming. With this process, handing the UE over to a base station that supports downlink beamforming may thereby help to ensure successful transmission to the UE at the GBR associated with the bearer.
Abstract:
In a wireless network comprising a plurality of carriers available for carrier aggregation transmissions between a base station and UE, the base station: (i) determines whether a requirement exists to transmit data between the UE and the base station via a carrier aggregation transmission; (ii) in response to determining that the carrier aggregation transmission requirement exists, selects a primary component carrier and one or more secondary component carriers from the plurality of carriers for the carrier aggregation transmission based on one or more of each carrier's receive power at the UE, transmit power at the base station, and frequency; (iii) allocates the selected primary and secondary component carriers to the carrier aggregation transmission; (iv) informs the UE of the allocation; and (v) executes the carrier aggregation transmission according to the allocation.
Abstract:
In a wireless network comprising a plurality of carriers available for carrier aggregation transmissions between a base station and UE, the base station: (i) determines whether a requirement exists to transmit data between the UE and the base station via a carrier aggregation transmission; (ii) in response to determining that the carrier aggregation transmission requirement exists, selects a primary component carrier and one or more secondary component carriers from the plurality of carriers for the carrier aggregation transmission based on one or more of each carrier's group delay, group delay variation, or insertion loss; (iii) allocates the selected primary and secondary component carriers to the carrier aggregation transmission; (iv) informs the UE of the allocation; and (v) executes the carrier aggregation transmission according to the allocation.
Abstract:
A method, system, and apparatus for assigning resources to a wireless communication device that experienced a call drop. A RAN may receive an origination request from a mobile station and make a first determination that within a predetermined amount of time prior to receiving the origination request the mobile station experienced a call drop. Responsive to making the first determination, the RAN may make a second determination that the RAN should allocate a first extent of resources to the mobile station rather than allocating a second extent of resources to the mobile station. The first extent of resources may be less than the second extent of resources. Responsive to making the second determination, the RAN may allocate the first extent of resources to the mobile station in response to the origination request rather than allocating the second extent of resources to the mobile station in response to the origination request.
Abstract:
A method, system, and apparatus for managing release of air interface traffic channels are described. When a radio access network (RAN) is deciding whether to release traffic channels assigned to one or more of a plurality of mobile stations, the RAN may prioritize the release of the assigned air interface traffic channels based on reported air interface conditions. For instance, when the RAN is deciding whether to release a traffic channel from a first mobile station or a second mobile station, the RAN may determine to release the assigned traffic channel from the first mobile station if the first mobile station is experiencing worse air interface conditions.
Abstract:
During a communication session, a filter in the RAN may filter signals sent over the communication pathway. When the filter filters signals sent over communication pathway, it may also cause some filter loss in the signals. The amount of the filter loss may vary as a function of frequency. Before the start of a communication session, the RAN may determine a filter loss for a given frequency. Because a higher filter loss indicates the RAN will transmit (or receive) a weaker signal, it may be undesirable to transmit signals to WCDs that are located a far distance from the RAN with frequencies having high filter losses. Thus, once the RAN has determined a filter loss for a given frequency, the RAN may reserve the given frequency for use in communication between the RAN and at least one WCD based on a distance between the WCD and the RAN.
Abstract:
A RAN may receive a call establishment request, on a first frequency, seeking to establish a call involving a WCD. In response to receiving the request, the RAN may select a plurality of wireless coverage areas, each defined using the first frequency. The RAN may determine that utilization of a first wireless coverage area of the selected wireless coverage areas meets a utilization threshold. In response, the RAN may determine that a strength at which the WCD receives signals from the first wireless coverage area exceeds the strengths at which the WCD receives signals from other wireless coverage areas in the plurality of wireless coverage areas by at least a signal strength differential value. Accordingly, the RAN may assign, to the WCD, a traffic channel from a second wireless coverage area, defined using a second frequency, for supporting the call.
Abstract:
A wireless network includes first-configuration sectors with a first frequency assignment and second-configuration sectors with a second frequency assignment. When served by a first-configuration sector that borders a second-configuration sector, the mobile station receives (i) a neighbor list that identifies neighbor sectors of the primary sector, including the second-configuration sector, (ii) a primary-sector reference distance between a transmitter for the primary sector and a reference point in the primary sector, and (iii) a neighbor-sector reference distance between a transmitter for the second-configuration sector and the reference point. Based on the reference distances, the mobile station calculates a border distance between the primary sector's transmitter and a border between the sectors. The mobile station compares its distance from the primary sector's transmitter to the primary-sector reference distance and/or border distance. Based on the comparison, the mobile station selects a scanning algorithm that determines when to scan for the second-configuration sector.
Abstract:
A method and system is disclosed for selection of an air interface protocol based on spectral efficiency (SE). When a request for service is received from a wireless communication device on a first air interface, a requested SE of the request will be determined, and a first ratio of the requested SE to an average SE on the first air interface computed. If the first ratio is greater than a threshold, the requested service will be provided on the first air interface. Otherwise, a projected SE of providing the requested service on a second air interface will be determined, and a second ratio of the projected SE to an average SE on the second air interface computed. If the first ratio is greater than the second ratio, the requested service will be provided on the first air interface. Otherwise, the requested service will be provided on the second air interface.
Abstract:
A wireless network includes first-configuration sectors with a first frequency assignment and second-configuration sectors with a second frequency assignment. When served by a first-configuration sector that borders a second-configuration sector, the mobile station receives (i) a neighbor list that identifies neighbor sectors of the primary sector, including the second-configuration sector, (ii) a primary-sector reference distance between a transmitter for the primary sector and a reference point in the primary sector, and (iii) a neighbor-sector reference distance between a transmitter for the second-configuration sector and the reference point. Based on the reference distances, the mobile station calculates a border distance between the primary sector's transmitter and a border between the sectors. The mobile station compares its distance from the primary sector's transmitter to the primary-sector reference distance and/or border distance. Based on the comparison, the mobile station selects a scanning algorithm that determines when to scan for the second-configuration sector.