The performance and ease of management of wireless communications environments is improved by a mechanism that enables access points (APs) to perform automatic channel selection. A wireless network can therefore include multiple APs, each of which will automatically choose a channel such that channel usage is optimized. Furthermore, APs can perform automatic power adjustment so that multiple APs can operate on the same channel while minimizing interference with each other. Wireless stations are load balanced across APs so that user bandwidth is optimized. A movement detection scheme provides seamless roaming of stations between APs.

A method and network node (130; 110; 111) for managing uplink resources to be used by a wireless device 120. Cells (115, 116) for serving the wireless device (120) form at least one imbalance region (117) in which the wireless device (120) has the best quality in the downlink to a first cell (115) of a first type and in the uplink to a second cell (116) of a different, second type. The network node (130; 110; 111) identifies (301; 501) a situation associated with a risk for undesired decrease of transmit power used by the wireless device (120) when the wireless device (120) moves in the imbalance region (117). The network node (130; 110; 111) provides (302; 502), in response to the identification, an adjustment and/or record of a load in the uplink between the wireless device (120) and the first cell (115) and use of said adjusted and/or recorded load for determining one or more uplink resources to be used by the wireless device (120).

Methods, systems, and devices for wireless communication are described. A wireless device may receive a configuration message that includes overlapping basic service set (OBSS) coordination parameters. The OBSS coordination parameters may be used to select an OBSS preamble detection (PD) threshold or a transmission (TX) power, or both. For example, an OBSS coordination parameter may include an indication of an OBSS PD threshold or the TX power or a range of OBSS PD thresholds or TX powers. In some cases, the coordination parameter may include selection criteria that may be used to select the indicated OBSS PD threshold or TX power. Additionally or alternatively, a range of selection criteria may be used to select from a range of OBSS PD thresholds and TX powers. The wireless device may use the selected OBSS PD threshold or TX power to communicate with an AP or other devices.

Embodiments of the present invention disclose a power estimation method and apparatus. On a premise of controlling interference caused by a second node to a first node to be within a range, a transmit power of the second node can be increased so as to improve communication quality of the second node. A specific solution is: obtaining an estimated load value of each first node in N first nodes according to a transmit power and user service requirements of each first node that are obtained and according to a transmit power set for each second node in M second nodes, and further, respectively using the transmit power set for each second node as an allowed transmit power of each second node according to the estimated load value of each first node in the N first nodes.

A method and a device are provided for adjusting signal strength of a router. In the method: the device monitors a number of terminals wirelessly connected to the router during a preset time period. The device determines a signal-strength level of the router according to the number of the terminals wirelessly connected to the router during the preset time period. The device adjusts the signal strength transmitted by the router according to the signal-strength level. Through the present disclosure, a router may automatically control the signal strength transmitted by itself.

Provided is a method for transmitting and receiving inter-cell information for cancelling inter-cell interference in a wireless communication system. The method for transmitting and receiving inter-cell information may comprise the steps in which: a base station of a victim cell transmits, to a base station of an adjacent aggressor cell, a first PMI set which is a set of PMIs of a signal corresponding to an area partitioned in a predetermined direction; the base station of the aggressor cell transmits, to the victim cell, the signal of the PMIs by using a specific resource; the base station of the victim cell receives, from a terminal in the victim cell, a feedback signal on the signal of the PMIs; the base station of the victim cell transmits, to the base station of the aggressor cell, the feedback information; and the base station of the aggressor cell updates the first PMI set to a second PMI set on the basis of the feedback information, and transmits, to the base station of the victim cell, the updated second PMI set.

An arrangement for controlling energy consumption of a network node associated with a cell includes a terminal activity monitor configured to detect active terminals served by the cell. A transmission controller is connected to the terminal activity monitor and is configured to restrict transmission downlink in the cell during time periods when there are no active terminals served by the cell. During these time periods transmission is restricted to intermittent transmission of information assisting active terminals not served by the cell in finding the cell.

A user equipment receives a signal indicating a time schedule for intermittent transmission of information from a base station managing a cell. The intermittent transmission of information enables the UE to perform mobility measurements when the cell is in a discontinuous transmission (DTX) mode and the UE is an active terminal not served by the cell. The UE performs, based on the intermittent transmission of information, a mobility measurement when the cell is in the DTX mode and reports the mobility measurement to the base station.

Systems and methods are provided for optimizing the scheduling of Orthogonal Frequency-Division Multiple Access (OFDMA) transmissions in the downlink (DL) direction. A two-stage mechanism can be implemented when effectuating DL OFDMA transmission involving multiple modulation and coding schemes (MCS) in a single transmit burst. A first stage of the two-stage mechanism may use radio frequency (RF) boosting/de-boosting of Resource Units (RUs) such that the average input power to an AP power amplifier (PA) may remain under a saturated PA output power to ensure PA linearity. If RF boosting/de-boosting is not supported, an alternative mechanism for OFDMA grouping (to rigid grouping) can be employed to skip higher MCS.

An SUOC radio employs: (1) Spectrum sensing and parameter estimation methods to characterize potential FUOCs; (2) A rate pair prediction tool to guide it's choice of FUOC to target along with the appropriate rate pair (SUOC and FUOC achievable rates); (3) Machine learning methods to automatically and on the fly advantage experience/history; (4) A decision maker with multiple possible procedures that govern steps of interaction; (5) Multiuser detection receiver to deal with the interference once information-bearing transmission has commenced by the SUOC radios. (6) a radio capable of full transmit-processing chain to accomplish modulation and full receive-processing chain to accomplish demodulation, as well as other radio functions necessary for successful wireless communications such as medium access control, networking and other functions.