摘要:
A method of operating a wireless transmission system having antenna elements that are driven by corresponding antenna ports is disclosed. The method includes, in a base system, transmitting a first antenna port configuration for receipt by a remote radio head. The method also includes, in the remote radio head, allocating first communication signals among the antenna ports based on the first antenna port configuration, and transmitting the first communication signals to the antenna ports for wireless transfer to user devices. The method also includes, in the base system, identifying active sets that indicate active pilot signals for the user devices, processing the active sets to identify a second antenna port configuration, and transmitting the second antenna port configuration for receipt by the remote radio head. The method also includes, in the remote radio head, allocating second communication signals among the antenna ports based on the second antenna port configuration.
摘要:
The invention discloses a method of optimizing handoff time in a wireless communication system from a first base station to a second base station through a dynamic data source control, the method comprising determining a communication delay between a network service node of the wireless communication system and the second base station; setting a scheduling delay for the second base station; determining a handoff delay based on the communication delay and the scheduling delay and indicating said handoff delay to a mobile communication device, wherein the mobile communication device performs the handoff from the first base station to the second base station on expiry of the handoff delay so determined.
摘要:
A method and system for using a handoff threshold associated with a slot cycle index to determine whether to perform access terminal handoff from a current pilot signal to a target pilot signal. The determination may be conditioned on whether the current pilot signal and target pilot signal are transmitted from base stations within a common subnet. If the base stations are within a common subnet, handoff of the access terminal is based on a default handoff threshold. On the other hand, if the base stations are not within a common subnet, then the determination of whether to perform access terminal handoff from a current pilot signal to a target pilot signal may be made based on the handoff threshold associated with the slot cycle index. As a result, ping-ponging of the access terminal from one subnet to another may be reduced or prevented.
摘要:
The usage capacity of a base station operating in four-branch receive diversity mode is limited to a given number of channel resources, where each channel resource corresponds to an active user. In two-branch receive diversity mode, approximately twice as many channel resources are available, but the receiver sensitivity is less than with four-branch mode. Thus, four-branch mode provides better coverage but with less usage capacity. A base station is operated in four-branch mode to provide the best coverage while usage is low. When the number of users reaches a first threshold, prior to reaching the maximum number of users, the base station transitions to two-branch mode to accommodate an anticipated increase of users above the four-branch capacity, although with reduced coverage. When usage then falls below a second threshold, the base station transitions back to four-branch mode, again providing better coverage.
摘要:
Methods and systems are provided for session restoration upon return to EV-DO. In one embodiment, a first radio network controller (RNC) receives from an access terminal a session-establishment request, where the session-establishment request requests establishment of a session for the access terminal. The first RNC determines that the session-establishment request indicates that the access terminal does not currently have a session, and responsively queries a second RNC to determine whether the access terminal currently has a session with the second RNC, which the access terminal does. After querying the second RNC, the first RNC receives session data from the second RNC, where the session data corresponds to the session that the access terminal currently has with the second RNC. The first RNC uses the received session data to set up a session with the first RNC for the access terminal.
摘要:
Methods and systems are provided for considering macro-network reverse-link conditions when selecting a power level at which to send an initial access probe to a femtocell. In at least one embodiment, a mobile station receives an indication of macro-network reverse noise, and then selects an initial-access-probe transmit power level based at least in part on the value of the received indication. The mobile station then sends an initial access probe to a femtocell at the selected power level. The mobile station may receive indications of macro-network reverse noise such as a reverse noise rise (RNR), reverse frame error rate (RFER), reverse activity bits (RAB), suggested macro-network initial-access-probe transmit power levels, etc.
摘要:
Disclosed is a method and corresponding wireless communication device (WCD) arranged to control how often the device engages in background communication. For example, the WCD may programmatically evaluate a history of transmission power that it has used for transmitting to a serving radio access network. Based on that history of transmission power, the device may then determine how often it should engage in background communications and may set itself to engage in background communications at that determined frequency.
摘要:
Femtocell radio access network (RAN) devices are typically small, low-cost base stations that can be deployed in areas where macro-cellular RAN coverage is poor or congested. Thus, wireless communication devices (WCDs) using femtocell devices may benefit from improved wireless coverage, while traffic is offloaded from the macro-cellular RAN. It is desirable to use femtocell devices to their full extent, but also to give the owners of these femtocell devices control over which WCDs may use of femtocell services. Accordingly, femtocell devices may be provisioned with a “greylist” that specifies which WCDs are granted full femtocell services, and which WCDs are granted limited or no femtocell services.
摘要:
Methods and systems are provided for prioritizing time-division multiplexed communications resources at a femtocell. A femtocell initially provides time-division-multiplexed wireless service to a plurality of wireless communication devices (WCDs) using a first number of slots per cycle, each WCD in the plurality having at least one assigned slot. During the first time period, the femtocell detects a trigger. Responsive to detecting the trigger, the femtocell, in a second time period, switches to providing service using a second number of slots per cycle, the second number being less than the first number, such that a first WCD in the plurality does not have an assigned slot.
摘要:
Methods and systems are provided for prioritizing carriers in femtocell frequency-hopping pilot beacons. A femtocell receives registration requests from a number of mobile devices requesting to hand off service from a macro-network carrier to the femtocell. The femtocell identifies the macro-network carrier that each mobile device has handed off from. The femtocell then uses that information to prioritize future broadcasts of its frequency-hopping pilot beacon on those macro-network carriers on which the most mobile devices have handed off from. The prioritization could take the form of broadcasting more often on the higher priority one or more carriers per cycle, or broadcasting for a longer continuous period of time on the higher priority one or more carriers per cycle.