Abstract: A first number of wireless devices in communication with an access node over a first frequency band is determined. A total bandwidth and a spectral efficiency of the first frequency band are determined, and a throughput provided to each of the first number of wireless devices in the communication between the access node and the first number of wireless devices is calculated. Based on the total bandwidth of the first frequency band, the spectral efficiency of the first frequency band, and the throughput provided to each of the first number of wireless devices, a second number of wireless devices permitted to communicate with the access node over the first frequency band is determined. To determine a third number of wireless devices permitted to communicate with the access node over the first frequency band, the throughput provided to each of the first number of wireless devices is adjusted.

Abstract: Systems and methods of wirelessly transmitting user data are provided. A plurality of wireless communication devices are selected for a user data packet. Distinct user data is included for each of the plurality of wireless communication devices in the user data packet. Portions of the user data packet including the user data for each of the plurality of wireless communication devices are identified. The user data packet is then transmitted over a wireless air interface.

Abstract: Push-to-talk messages are sent via a wireless multicast channel to multiple push-to-talk groups of devices regardless of group membership. Thus, all of the devices using the multicast channel receive all of the push-to-talk messages. To separate messages bound for one push-to-talk group from those bound for another, a push-to-talk group specific orthogonal code is applied to each message. The devices in a specific group use the group specific orthogonal code to decode the received multicast messages. If a device decodes the multicast message with the correct group specific orthogonal code, then the message is decoded and the device can play the message. If a device decodes the multicast message with a different group specific code (i.e., because it is not a member of the group the message was intended for), the message is will not be properly decoded and thus will be unplayable or scrambled.

Abstract: A first cell is selected as a center cell for testing. Downlink transmissions from a one or more surrounding cells are loaded with test load levels. The downlink transmissions, when loaded with test load levels, include a selected amount(s) of the data portions of their transmission frames carrying orthogonal channel noise (OCN). A performance indicator of the center cell is measured/determined while the surrounding cell(s) are transmitting test load levels and while the center cell is communicating user traffic between the center cell and a first plurality of wireless devices. The test load levels of the surrounding cells may also include user traffic in addition to the OCN.

Abstract: A method, system, and medium are provided for improving uplink performance of an antenna array configured for downlink beam forming. Beam forming requires an antenna element spacing that results in correlated downlink signals. Uplink reception preferably uses an element spacing such that uplink signals are uncorrelated. For an eight-element antenna configured for beam forming, using eight-branch combining to produce a single resultant signal is thus less than optimal. In an embodiment, non-adjacent elements in the antenna array, which receive uncorrelated signals, may be combined in pairs with two-branch combining. The four resultant signals may then be combined using four-branch combining to provide a single resultant signal.

Abstract: A method of operating a communication system comprises sending a frame by an access node to a wireless device where the frame comprises a packet. A counter is initialized and a timer for each frame is initiated. The method continues with the access node determining if a response associated with the packet is received before the expiration of the timer. If the response is received prior to the expiration of the timer, the counter and the timer are reset. If a response is not received prior to the expiration of the timer, the counter is incremented. Upon the counter meeting a criteria of a certain quantity of lost packets, the access node performs a synchronization process.

Abstract: In systems and methods of reducing latency in a wireless communication system, a first signal of a first radio access technology and a second signal of a second radio access technology are received at a first antenna and a second antenna of a wireless device. From a first circulator the first signal received at the first antenna and the second antenna are received and combined to generate a combined first signal. In addition, from a second circulator the second signal received at the first antenna and the second antenna are received and combined to generate a combined second signal. While receiving the first signal of the first radio access technology, a call request is received over the second signal of the second radio access technology.

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: Systems and methods of uplink bandwidth allocation for a handoff are provided. A mobile station can transmit a handoff request message to a serving base station. The mobile station and the target base station can exchange synchronization messages and the mobile station can then subsequently receive an unsolicited allocation of a number of uplink sub-channels from the base station.

Abstract: A signal is received at a plurality of antennas of a wireless device, and a signal strength indicator is calculated for the signal received at each of the plurality of antennas. From the plurality of antennas, a subset of antennas associated with the highest signal strength indicators are selected, and maximum ratio combining is performed on the signals received by the selected subset of antennas.

Abstract: Systems and methods of automatically optimizing an operational radio access network are provided. Objective and operational cost functions for the radio access network are generated, and a deviation between the generated cost functions is determined. At least one aspect of the radio access network is adjusted in order to minimize the determined deviation between cost functions.

Abstract: Systems and methods for Walsh code assignment are provided. In accordance with the disclosed exemplary embodiments, when a set of mobile communication units (MU) is in a control/hold state, instead of a base transceiver station (BTS) assigning Walsh codes for respective dedicated control channels (dcch ) to the set of mobile communication units (MU) on a one-to-one basis, the base transceiver station (BTS) circulates the Walsh codes among the set of mobile communication units (MU). Thus, at a given time, the base transceiver station (BTS) has assigned the available Walsh codes to only a subset of the mobile communication units (MU) in the control/hold state. Accordingly, this Walsh code assignment allows the system to support more mobile communication units (MU) in the control/hold state.

Abstract: Systems and methods of extending base station coverage are provided. Idle mode mobile stations supported by a base station are identified, and at least one of the idle mode mobile stations is selected based on a location of the at least one idle mode mobile station. A communication with an active mode mobile station that is associated with the at least one idle mode mobile station is established. The active mode mobile station is not able to directly receive communications from the base station, and the identification and selection of idle mode mobile stations and the establishment of the communication are performed by the base station.

Abstract: A multi-carrier base transceiver system is configured to improve sector throughout by selectively allocating available carriers to subscribers based on Quality of Service (QoS) requirements, as well as the prevailing radio frequency (RF) environment for the subject subscriber. In one embodiment, the base transceiver may provide three separate carriers, each represented as a forward link channel in which individual time slots are separately allocated according to a scheduling protocol. Once the QoS requirements and prevailing RF conditions are determined, a number of the available carriers are allocated such that the desired throughput is achieved using a fewest number of carriers.

Abstract: Systems and methods for adjustable transmit diversity (adjustable PSTD) are provided. A base station transmits information to a mobile station over two antennas. Using information received from the mobile station related to channel conditions, the base station can adjust a frequency offset between the information transmitted over the two antennas.

Abstract: A method of operating a communication system comprises sending a frame by an access node to a wireless device where the frame comprises a packet. A counter is initialized and a timer for each frame is initiated. The method continues with the access node determining if a response associated with the packet is received before the expiration of the timer. If the response is received prior to the expiration of the timer, the counter and the timer are reset. If a response is not received prior to the expiration of the timer, the counter is incremented. Upon the counter meeting a criteria of a certain quantity of lost packets, the access node performs a synchronization process.

Abstract: Systems and methods of testing a wireless network are provided. Simulated user data, spread across all user data sub-carriers of all sub-channels of a frequency band assigned for transmissions, is transmitted by a number of base stations surrounding a base station under test. The power level of the simulated user data is determined based on a selected network load. A mobile station receives signals from the base station under test and the number of base stations, and the interference caused by the simulated user data to the transmission from the base station under test is determined. When less than 100% loading is employed for testing, the sub-channels carrying the simulated user data can vary on a frame-by-frame basis.

Abstract: Systems and methods of controlling transmission of communications from a base station to a wireless communication station are provided. When the signal quality of communications between the base station and the wireless communication station are above a predetermined signal quality level, multiple antennas are employed for transmitting such communications. When the signal quality of transmissions by the base station to the wireless communication station are below a predetermined signal quality level, a single antenna is employed for transmitting such communications.

Abstract: A wireless communication system is disclosed comprising a communications network; and a plurality of base transceiver stations (BTS) coupled to the communications network. At one of the BTS is adapted to send traffic data modulated onto orthogonal frequency division multiplexing (OFDM) tones to mobile units, and send control data modulated onto code division multiplexing (CDM) codes to the mobile units. The BTS may be further adapted to send pilot data modulated onto OFDM tones to the mobile units. The transmission of the data may be compatible with HSDPA and/or IP Wireless protocols. Because the modulation scheme for the traffic data is OFDM instead of CDM, higher throughputs may be achieved in an HSDPA and/or IP Wireless-based wireless communication systems.

Abstract: Systems and methods of allocating sub-channels are provided. A method a signal quality measure associated with a first mobile station is determined. It is also determined that the first mobile station has an associated Quality of Service (QoS) above a predetermined QoS. A number of sub-channels are allocated to the first mobile station based on the signal quality measure and QoS associated with the first mobile station, where more sub-channels are allocated for lower signal quality measures compared to higher signal quality measures.