Abstract: A mobility server receives a tracking area update from User Equipment (UE) indicating UE Identifier (ID) and current tracking area ID and responsively determines if the current tracking area ID is new tracking area ID. If current tracking area ID comprises new tracking area ID, then the mobility server updates a tracking area database with new tracking area ID. The mobility server translates UE ID and current tracking area ID into candidate Access Point Name (APN) data set and determines if candidate APN data set is a new APN data set. If candidate APN data set comprises new APN data set, then the mobility server transfers an instruction for UE to perform a wireless reattachment to obtain candidate APN data set and receives an attachment request from UE indicating UE ID and current tracking area ID and responsively transfers candidate APN data set to a data network gateway.

Abstract: As a communication device receives packet data via a first access network, the communication detects that packet data arriving via a second access network is duplicative of the packet data that the communication device is receiving via the first access network. In response to detecting such duplication, the communication device discontinues being served by the first access network and continues with communication via the second access network.

Abstract: When a UE has a first bearer with a gateway via a first base station and the UE engages in session setup signaling with a session server via that first bearer to set up a media session, the network may establish for the UE a second bearer via a second base station, and may the second bearer for communication of media content of the session while using the first bearer for communication control signaling for the session. In practice, the first base station could be a macro base station that operates on licensed frequency spectrum, while the second base station could be a small cell that operates on unlicensed frequency spectrum. The disclosed process can thereby help to offload communication of session content to be via the small cell instead of via the macro base station, while maintaining session control signaling to be via the macro base station.

Abstract: Disclosed is a method and system for channel selection. As disclosed, a wireless communication system includes a base station that is configured to operate on a plurality of channels, each having a respective level of port-to-port isolation. The system determines a measure of quality of an air interface between the base station and a user equipment device (UE) served by the base station. The system then selects, from the plurality of channels, a channel on which the base station should serve the UE, where the selecting is based at least in part on (i) the determined measure of quality of the air interface between the base station and the UE and (ii) a correlation between the determined measure of quality of the air interface and the respective level of port-to-port isolation of the channel. Upon the selection, the base station serves the UE on the selected channel.

Abstract: According to aspects of the present disclosure, a method and system are provided for managing handover. In accordance with the disclosure, while a source base station serves a UE, the source base station receives from the UE a measurement report providing an indication of a plurality of candidate target base stations having coverage detected by the UE. Responsive to the report, a CSI reporting rate is determined for each of the candidate targets on a per base station basis. A channel coherence is also determined for the UE. The communication system then selects a target base station from the plurality of candidate targets based on (i) the determined channel coherence and (ii) the determined CSI reporting rates, and the source base station then triggers handover of the UE from the source base station to the selected target base station.

Abstract: One embodiment takes the form of a method carried out by a base station. The method includes the base station serving a wireless communication device (WCD) on a given air-interface resource. While serving the WCD, the base station may receive a data packet from the WCD. In response, the base station may update the data packet to include an indication of the given air-interface resource on which the base station is serving the WCD. The base station may then transmit the updated data packet for receipt by one or more gateways.

Abstract: One embodiment takes the form of a method carried out by a handover source while the handover source is serving a UE with communication service at a quality of service level. The method includes the handover source transmitting, to a first handover target, a first handover request including an indication of the quality of service level. Next, in response to the transmitted first handover request, the handover source receives from the first handover target a response indicating that the first handover target does not support the quality of service level, but specifying a second handover target that supports the quality of service level. The handover source may then transmit to the specified second handover target a second handover request seeking handover of the UE from being served by the handover source to being served by the second handover target.

Abstract: Example methods and systems for requesting information from the Internet Domain Name System (DNS) based on a destination and one or more codecs of a source specified within a computer-readable invitation to establish a communication session are described. A source gateway or a user agent device can generate the invitation. A DNS record associated with the destination can specify codecs used by the destination or a gateway the destination uses to carry out communication sessions. A proxy server that received the invitation and the DNS record can select a gateway that uses a codec that matches a codec used and preferred by a gateway. The proxy server can forward the codec to selected gateway, in particular, to an IP address and port associated with the selected gateway, for notifying the destinations of the requested communication session. The invitations can comprise SIP INVITE messages.

Abstract: Disclosed is an arrangement in which a radio access network detects a trigger such as the RAN being threshold loaded, and the RAN responsively causes each of one or more served UEs to transition from operating in a mode in which the UE would engage in call initiation signaling via the RAN to set up the call extending through the RAN, so the UE would then engage in the call served by the RAN to operating in a mode in which the UE would engage in call initiation signaling via the RAN to instead set up the call extending through another RAN and would transition to be served by the other RAN, so the UE would engage in the call served by the other RAN. As disclosed, one RAN may be an LTE RAN, and the other RAN may be a fallback RAN such as a CDMA or GSM RAN.

Abstract: Examples disclosed herein provide systems, methods, and software for responding to data balance queries for a wireless device. In one example, a method of operating a communication system includes initiating a data balance query for a wireless device and transferring the query to a packet data network gateway. In response to the query, the packet data network gateway and an online charging server are configured to transfer data usage information to a prepaid management system. In turn, the prepaid management module is configured to update the account for the wireless device based on the data usage information, and provide a data balance response to the wireless device.

Abstract: Examples disclosed herein provide systems, methods, and software for managing service modification requests in a serving gateway. In one example, a method of operating a serving gateway includes identifying an incoming service modification from a packet data network gateway and determining whether the incoming service modification is permitted based on policy data. The method further includes, if the incoming service modification is permitted, allowing the incoming service modification to proceed across the Long-Term Evolution network. The method also provides, if the incoming service modification is not permitted, altering the incoming the incoming service modification based on the policy data.

Abstract: A network node through which VoIP call setup signaling passes between a user equipment device (UE) and a VoIP call server detects VoIP call setup failure and responsively invokes setup of an alternate call between the UE and the called destination. For instance, a packet-gateway in an LTE network may detect VoIP call setup failure and may responsively invoke setup of a circuit-switched fallback call between the UE and the called destination.

Abstract: A Mobility Management Entity (MME) system and method to disable Voice over LTE (VoLTE) service of a Long Term Evolution (LTE) base station (BS) are provided. The MME system in one example includes a data communication interface configured to receive VoLTE performance metrics and transmit and receive signaling messages over a communication network and a processing system configured to process VoLTE performance metrics obtained through the data communication interface to determine if VoLTE service on the LTE BS should be disabled, and if VoLTE should be disabled and if a create bearer request obtained through the data communication interface has a Quality-of-Service Class Identifier (QCI) value indicating a VoLTE session for a UE, transfer a reject message for delivery to the UE instructing the UE to use a different BS for voice service.

Abstract: In systems and methods of allocating root sequences to access nodes, a first coverage radius and a first neighbor list of a first access node are determined, wherein the first neighbor list comprises second access nodes which are each a neighbor access node of the first access node. A second coverage radius and a second neighbor list of each of the second access nodes is then determined. An access node comprising a largest coverage radius from among the first access node and the second access nodes is selected. A number of root sequences required for the selected access node is calculated based on the coverage radius of the selected access node, and root sequences are assigned to the selected access node according to the number of root sequences required.

Abstract: Disclosed is a method and system to help better manage resources when a mobile terminal is roaming while within a home-carrier coverage hole or while otherwise threshold close to home carrier coverage. In accordance with the disclosure, a mobile terminal's home carrier will determine that the mobile terminal is being served by a roaming carrier's cell site that is threshold close to a home carrier's cell site, and the home carrier will responsively assign to the mobile terminal an IP address that the home carrier is configured to block.

Abstract: A method and system for setting a hold-timer duration is disclosed. The method involves a first network initially serving a user equipment device (UE), wherein serving the UE comprises allocating at least one resource to the UE and using the at least one resource to serve the UE. The method also involves detecting transition of the UE from being served by the first network to being served by a second network. The method further involves, after the UE transitions to the second network, applying a hold-timer having a hold-timer duration for release of the at least one resource. Further, the method involves, before setting the hold-timer duration, the first network receiving from the UE a report including an indication of radio frequency (RF) quality of the second network. The method also involves using the reported indication of RF quality as a basis to set the hold-timer duration.

Abstract: A method and corresponding system to help manage user equipment device (UE) transmission power, specifically in a scenario where the UE was being served by a base station on a first carrier frequency and the UE is then going to communicate with a base station (whether the same or another base station) instead on a second, different carrier frequency. As disclosed, a UE may determine, based on communication by the UE on the first carrier frequency, a baseline initial transmit power for the UE to use for an initial transmission from the UE to a cellular base station on the second carrier frequency. Responsive to the second carrier frequency being different than the first carrier frequency, the UE may adjust the baseline initial transmit power to establish an adjusted initial transmit power. The UE may then engage in the initial transmission using the adjusted baseline initial transmit power.

Abstract: A wireless-communication system includes a first network and a second network (e.g., an EV-DO network and a 1xRTT network, respectively). A wireless-communication-system entity determines that a mobile station is engaged in a first type of communication (e.g., a voice call) via the first network. In response to making the determination, the entity configures the second network to send second-network data (e.g., 1xRTT page messages) to the mobile station via an inter-network connection interface.

Abstract: A wireless communication device uses an Orthogonal Frequency Division Multiplex (OFDM) resource block structure. The wireless communication device generates and stores data for wireless transmission. The wireless communication device translates an identifier and a current time into one or more OFDM resource blocks that are reserved for use without base station scheduling. The wireless communication device generates one or more authorization marks. The wireless communication device wirelessly transmits the data and the one or more authorization marks in the one or more OFDM resource blocks that are reserved for use without base station scheduling.

Abstract: One embodiment takes the form of a method carried out by a gateway. The method includes the gateway receiving a message that was originated by a wireless communication device (WCD) being served by an access network. Next, the gateway may identify a given air-interface resource on which the access network is serving the WCD. After receiving the message, the gateway may use the given air-interface resource to determine one or more rules for decrementing an account balance associated with the WCD. The gateway may then decrement the account balance associated with the WCD in accordance with the determined one or more rules.