The present disclosure discloses a system and method for using call admission control for client balancing. Specifically, a network device receives a message from a first access point in a network indicating that the first access point has rejected a call request received by the first access point from a particular client device. The particular client device is associated with the first access point. Moreover, the network device selects a second access point that is located in a radio frequency neighborhood of the particular client device. Further, the network device determines that the second access point has capacity to accept the call request from the particular client device, and steers the client device to associate with the second access point.

The present invention provides a method and a base station each for transmitting uplink scheduling information. The method includes the steps of: for an uplink subframe to be scheduled in accordance with the uplink scheduling information, selecting, from a downlink subframe candidate group, a downlink subframe usable for transmission of the uplink scheduling information, the downlink subframe candidate group including (1) a first downlink subframe corresponding to the uplink subframe in accordance with a predetermined scheduling timing and (2) one or more second downlink subframes each not corresponding to the uplink subframe in accordance with the predetermined scheduling timing; and transmitting the uplink scheduling information in the selected downlink subframe.

The present invention provides a method and a base station each for transmitting uplink scheduling information. The method includes the steps of: for an uplink subframe to be scheduled in accordance with the uplink scheduling information, selecting, from a downlink subframe candidate group, a downlink subframe usable for transmission of the uplink scheduling information, the downlink subframe candidate group including (1) a first downlink subframe corresponding to the uplink subframe in accordance with a predetermined scheduling timing and (2) one or more second downlink subframes each not corresponding to the uplink subframe in accordance with the predetermined scheduling timing; and transmitting the uplink scheduling information in the selected downlink subframe.

A method for transmitting control information related to a hybrid automatic repeat request (HARQ) process operation using a frequency division duplex (FDD) frame structure by a base station (BS) in a wireless communication system; the BS therefore; a method for receiving control information related to a HARQ process operation using a FDD frame structure by an RN; and the RN therefore are discussed. The method for transmitting control information according to one embodiment includes transmitting information related to a number of HARQ processes. The HARQ processes are sequentially assigned to subframes configured for the RN-to-the BS transmission. If a subframe configured for the BS-to-the RN transmission is a subframe n, a subframe configured for the RN-to-the BS transmission is a subframe n+4. The method further includes transmitting a HARQ ACK/NACK signal for uplink data through a corresponding subframe based on the number of HARQ processes.

A method for transmitting control information related to a hybrid automatic repeat request (HARQ) process operation using a frequency division duplex (FDD) frame structure by a base station (BS) in a wireless communication system; the BS therefore; a method for receiving control information related to a HARQ process operation using a FDD frame structure by an RN; and the RN therefore are discussed. The method for transmitting control information according to one embodiment includes transmitting information related to a number of HARQ processes. The HARQ processes are sequentially assigned to subframes configured for the RN-to-the BS transmission. If a subframe configured for the BS-to-the RN transmission is a subframe n, a subframe configured for the RN-to-the BS transmission is a subframe n+4. The method further includes transmitting a HARQ ACK/NACK signal for uplink data through a corresponding subframe based on the number of HARQ processes.

Systems, methods, and devices for high-efficiency wireless frequency division multiplexing are provided. A method includes receiving, at a first wireless device, a reference signal from an associated access point, the reference signal indicative of a time of joint transmission with at least a second wireless device. The method further includes transmitting a first communication to the access point based on the reference signal, the communication utilizing a first subset of wireless frequencies available for use. The first communication is concurrent with a second communication, from the second wireless device, utilizing a second subset of wireless frequencies, the second subset excluding the first subset.

Systems, methods, and devices for high-efficiency wireless frequency division multiplexing are provided. A method includes receiving, at a first wireless device, a reference signal from an associated access point, the reference signal indicative of a time of joint transmission with at least a second wireless device. The method further includes transmitting a first communication to the access point based on the reference signal, the communication utilizing a first subset of wireless frequencies available for use. The first communication is concurrent with a second communication, from the second wireless device, utilizing a second subset of wireless frequencies, the second subset excluding the first subset.

Systems, methods, and devices for high-efficiency wireless frequency division multiplexing are provided. A method includes determining, at an access point, a performance characteristic for each wireless device in a set of wireless devices associated with the access point. The method further includes categorizing each wireless device in the set into at least a first and second subset of wireless devices based on the performance characteristic. The method further includes receiving communications from the first subset of wireless devices on a first set of wireless frequencies. The method further includes receiving communications from the second subset of wireless devices on a second set of wireless frequencies, the second set of wireless frequencies being a subset of the first. The first set of wireless devices have a higher performance characteristic than the second set of wireless devices.

Systems, methods, and devices for high-efficiency wireless frequency division multiplexing are provided. A method includes determining, at an access point, a performance characteristic for each wireless device in a set of wireless devices associated with the access point. The method further includes categorizing each wireless device in the set into at least a first and second subset of wireless devices based on the performance characteristic. The method further includes receiving communications from the first subset of wireless devices on a first set of wireless frequencies. The method further includes receiving communications from the second subset of wireless devices on a second set of wireless frequencies, the second set of wireless frequencies being a subset of the first. The first set of wireless devices have a higher performance characteristic than the second set of wireless devices.

The present disclosure provides a method and base station for transmitting scheduling information. The method comprises: determining that a downlink subframe corresponding to the uplink subframe according to a first scheduling timing corresponding to a first Time Division Duplex (TDD) uplink and downlink configuration scheme of a plurality of TDD uplink and downlink configuration schemes is unavailable for transmitting the scheduling information; obtaining a first equivalent TDD uplink and downlink configuration scheme by treating one or more downlink subframes, including the downlink subframe, in a radio frame as uplink subframes; selecting a downlink subframe corresponding to the uplink subframe according to a second scheduling timing corresponding to a second TDD uplink and downlink configuration scheme of the plurality of TDD uplink and downlink configuration schemes, wherein a set of downlink subframes specified in the second TDD uplink and downlink configuration scheme is a subset of a set of downlink subframes specified in the first equivalent TDD uplink and downlink configuration scheme; and transmitting the scheduling information in the selected downlink subframe.