Sprint Spectrum L.p.

Sprint Communications Comapny L.p.

Telefonaktiebolaget Lm Ericsson (publ)

Spring Spectrum L.p.

Manoj Shetty

Sachin R Vargantwar

Siddharth S Oroskar

Deveshkumar Narendrapratap Rai

Bhagwan Singh Khanka

Debasish Sarkar

Jasinder P Singh

Anoop Kumar Goyal

Ashvini Ganesh Canjeevaram

Maulik K Shah

Kamal Doshi

Siddarth S Oroskar

Ashvini Ganesh G Canjeevaram

Jason Peter Sigg

Ashish Bhan

Brett Lee Christian

Ayan Sen

Anil H Singh

Ramesh Kalathur

Sandeep Goyal

Surajit Mondal

Michael Hannigan

Devesh Kumar Rai

Ashvini Ganesh

Siddharth T Oroskar

Vijayant Thakur

The present disclosure relates to a method of obtaining at least one Key Performance Indicator (KPI) for a communication session () of a radio device (). The communication session is moved from a first Radio Access Technology (RAT) () to a second RAT (). The method comprises extracting first information about the communication session from at least a first log associated with the first RAT by filtering information relating to communication sessions which have moved between RATs from other communication sessions in the first log. The first information comprises a session identifier (ID) and a first time stamp associated with the communication session. The method also comprises extracting second information about the communication session from a second log associated with the second RAT by filtering information relating to communication sessions which have moved between RATs from other communication sessions in the second log. The first information comprises the session ID and a second time stamp associated with the communication session. The method also comprises merging the extracted first and second information with each other by means of the session ID and the first and second time stamps. The method also comprise determining the at least one KPI for the communication session based on the merged information.

Driveless method to capture CSFB experience

A Radio Network Controller, RNC, and a method performed by the RNC for handing over a UE from a Universal Terrestrial Radio Access Network, UTRAN, to an Evolved UTRAN, E-UTRAN, wherein the UE has an ongoing Circuit Switched, CS, call and an ongoing Packet Switched, PS, session by means of the UTRAN are provided. The method comprises, when the CS call is released: determining () at least one criterion relating to at least one of an RNC characteristic, a UTRAN characteristic and an E-UTRAN characteristic; and handing over () the UE to the E-UTRAN when the at least one criterion is fulfilled.

Radio network controller and method therein for handing over a user equipment from UTRAN to E-UTRAN

An access terminal establishes a session with a first radio access network (RAN). As a result, the access terminal receives a Unicast Access Terminal Identifier (UATI) assigned by the first RAN and establishes configuration settings for radio communications between the access terminal and the first RAN. The access terminal moves from the first RAN to a second RAN. Before the access terminal has a session established with the second RAN, the access terminal receives a request from a user to originate a call. In response, the access terminal sends the second RAN a connection request that includes the UATI assigned by the first RAN. The second RAN evaluates the UATI included in the connection request and determines that it was previously assigned to the access terminal by another RAN. Based on this determination, the second RAN grants the connection request by assigning a traffic channel to the access terminal.

Method and system for supporting call origination before session establishment

Disclosed herein is a method for improved paging in a wireless communication system. In a scenario where base stations broadcast congestion indicators to prevent mobile stations from registering in coverage areas that are experiencing threshold congestion, the method provides for a new form of zone based paging that accounts for the possibility that a mobile station has entered into a new zone but has not yet registered due to a threshold congestion state. According to the method, a paging attempt will be directed to the mobile station's zone of last registration and to only those coverage areas in at least one adjacent paging zone that are deemed to be experiencing threshold congestion.

Method and system for zone based paging based on congestion

A mobile station will sort wireless coverage sectors in order of distance of the sectors from the mobile station, and the mobile station will then scan for pilot signals from the sectors in the sorted order. The invention can be applied advantageously to provide an order of scanning remaining set sectors in a mobile station operating according to a code division multiple access protocol.

Method and apparatus for scanning sectors in order of distance from mobile station

A method and apparatus for handing off packet-transmission between sectors of a wireless communication system is disclosed herein. During transmission of a packet from an access network to an access terminal, the access terminal determines that the packet should theoretically be transmitted to the access terminal in fewer timeslots in another sector than the number of allowed timeslots remaining for the packet transmission in a current sector. In response, the access terminal abandons packet transmission in the current sector and hands off to the other sector, in an effort to increase throughput and save air interface resources.

Method and system for sector switching during packet transmission

A controller monitors resource usage in each of a plurality of sectors and identifies any sector with resource usage that exceeds a threshold value as a high usage sector. The controller evaluates the mobile stations in its area and identifies any mobile station that is using a high usage sector and at least two other sectors for a communication session as a candidate mobile station. The controller applies a predictive algorithm to determine whether any candidate mobile station is able to continue its respective communication session without using its respective high usage sector. In this determination, the signal levels that a mobile station reported for the sectors in its active set, other than the high usage sector, may be used to calculate a combined signal level. If the combined signal level exceeds a predefined value, the mobile station is instructed to drop the high usage sector.

Method and system for balancing soft handoff gain and resource usage

During connection establishment, an access network and/or an access terminal may decide whether to transmit bearer-traffic data rather than null-traffic data based on a channel quality of a wireless link. For example, if the access network has forward bearer-traffic data ready for transmission to the access terminal during connection establishment, the access network may decide to transmit that forward bearer-traffic data rather than forward null-traffic data in response to determining that a forward-channel quality of the wireless link is sufficient to carry such data. As another example, if the access terminal has reverse bearer-traffic data ready for transmission to the access network during connection establishment, the access terminal may decide to transmit that reverse bearer-traffic data rather than reverse null-traffic data in response to determining that a reverse-channel quality of the wireless link is sufficient to carry such data.

Method and system for connection establishment

A method and system for vertical handoff of a mobile station from a first-protocol RAN to a second-protocol RAN. The method and system provide a make-before-break vertical handoff, by having the first-protocol RAN (i) acquire, on behalf of the mobile station, a traffic channel assignment defining one or more traffic channel parameters for air interface communication in the second-protocol RAN, and (ii) pass to the mobile station, via the first air interface protocol, the one or more traffic channel parameters so that the mobile station can then readily switch over to communication under the second-protocol RAN. Optimally, the acquisition and passing of the one or more second-protocol traffic channel parameters may occur without the mobile station having requested the handoff, without the mobile station having asked for the traffic channel assignment, and without the mobile station having yet begun communication with the second-protocol RAN.

Method and system for vertical handoff with target traffic channel setup conveyed via source channel

A supporting node maintains a retransmission database that stores information about the historical retransmission rates of user terminals served by the network. The supporting network node provides the information about the retransmission rates of the user terminals to the base stations that are serving the user terminals. When a user terminal is being scheduled to receive a downlink transmission, the scheduler at the base station may use historical retransmission rates of the user terminal to select transmission parameters, e.g. modulation and coding scheme (MCS) and/or transport block size (TBS), for the downlink transmission.

Selecting transmission parameters for downlink transmissions based on retransmission rates

A power control command (PCC) transmission scheme is disclosed. In one embodiment, the PCC transmission scheme may involve an access network engaging in a respective communication session with each of a plurality of access terminals on a given wireless link and sending a respective series of PCCs directed to each of the plurality of access terminals on the given wireless link. Based on a power utilization of the given wireless link, the access network may then decide to adjust a transmission rate at which to send PCCs directed to a set of access terminals in the plurality of access terminals. In turn, the access network may send the respective series of PCCs directed to each of the set of access terminals at the adjusted transmission rate.

Method and system of adjusting power control command rate based on power utilization

A method and apparatus for selecting channel elements in a wireless communication system based on their performance history. Data is collected indicating the performance of various channel elements over time, preferably eliminating from consideration any performance degradation due to air interface (e.g., radio frequency) issues. The data is then used to sort the channel elements in a priority order, from best-performing to worst-performing. When a channel element is to be selected for use in connection with an air interface channel (e.g., traffic channel or control channel), the channel element is then selected in accordance with the priority order, such as by selecting the channel element that has performed best over time. The priority-based selection of channel elements can thus leave poor-performing channel elements for use as a last resort, which can be advantageous in times of heavy network loading for instance.

Performance based selection of channel elements for use in a wireless network

Methods and systems are provided causing a mobile station to, after experiencing a dropped call, originate a subsequent call via a coverage area different than that used for the first call. In an embodiment, a mobile station detects that, when it was engaged in the first call at a first location via a first wireless coverage area, the mobile station experienced the first call being dropped. When the mobile station subsequently attempts to originate a second call, the mobile station determines that its current location is within a threshold distance of the first location, and responsively attempts to originate the second call via a second wireless coverage area different from the first.

Methods and systems for causing a mobile station to originate a subsequent call via a coverage area other than that used for a first call

A method and mechanism to use a serving evolved Node B, eNB, to force a User Equipment, UE, (being served by that eNB) into Discontinuous Reception, DRX, mode despite pending data transactions at the UE. This results in timely reading of Extended Cell Global Identity, ECGI, of neighboring cell(s), thereby facilitating entry of a target cell into the serving cell's neighbor list via Automatic Neighbor Relation, ANR, and subsequent handover (if needed) to that target cell. The serving eNB may instruct its scheduler to not allocate any Resource Blocks, RBs, to the UE (especially when the UE has high volume of pending data transactions and/or when the UE is in motion and its retransmission rate is beyond a specific threshold) such that the UE automatically goes into the DRX mode. The duration of the DRX cycle also may be optionally extended until ECGI measurements from the UE are received.

Forced DRX during automatic neighbor relation (ANR) in LTE

A wireless communication device comprises a wireless communication transceiver and a processing system. The wireless communication transceiver is configured to detect first and second frequencies transmitted from a wireless access node and to receive first and second threshold values transmitted from the wireless access node. The processing system is configured to determine a distance between the wireless communication device and the wireless access node, compare the distance to the first threshold value, and if the distance falls below the first threshold value, select the first frequency. The processing system is further configured to compare the distance to the second threshold value, and if the distance exceeds the second threshold value, select the second frequency. The wireless communication transceiver is configured to exchange wireless communications with the wireless access node using the selected frequency.

Growing community of inventors

Overland Park, KS, United States of America

Manoj Shetty