Abstract: Self RF engineering is made possible for a wireless communication system by adding to the self-configuration capability the ability to set autonomously the power levels of the system base stations. The same data is employed as in self configuration. A further improvement for systems using the IS 136 Air Interface Standard consists of the capability to collect the required data through the functionalities of the MAHO/MACA (Mobile Assisted Hand Off/Mobile Assisted Channel Assignment). Improved system-initialization procedures are presented.

Abstract: A method and system for assigning downlink and uplink channels to a mobile station registered with a base station, which uses an interference-sensing scheme and which provides improved reliability and performance over conventional schemes. Pilot tones transmitted by active mobile stations registered with the base station are turned off, each corresponding to an assigned downlink channel. Pilot tones being transmitted by the base station are turned off, each corresponding to an uplink channel assigned to one of the active mobile stations. The mobile station is paged from the base station with a pending traffic packet and requests access for a traffic packet. Interference sensing is performed at the base station to identify interference-free downlink channels and at the active mobile stations to identify interference-free uplink channels. A list of uplink channels identified as being acceptably interference-free is transmitted from each of the active mobile stations.

Abstract: Self RF engineering is made possible for a wireless communication system by adding to the self-configuration capability the ability to set autonomously the power levels of the system base stations. The same data is employed as in self configuration. A further improvement for systems using the IS 136 Air Interface Standard consists of the capability to collect the required data through the functionalities of the MAHO/MACA (Mobile Assisted Hand Off/Mobile Assisted Channel Assignment). Improved system-initialization procedures are presented.

Abstract: Network management methods are disclosed for reducing channel interference in channelized wireless communications systems, to reduce either co-channel or neighbor-channel interference, or a combination thereof. These techniques reduce total interference. The techniques are in the context of circuit-switched calls of independent inter-arrival times and different durations and can be used for both voice and data packet-based transmission. The forward and reverse links of a wireless connection are de-coupled, as for example for packet assignment, and the techniques are applied in each of the two directions independently.

Abstract: A channel assignment system assigns channels to various cells by the optimal partitioning of the available radio frequencies into non-overlapping sets, the optimal grouping of co-user cells, and the best assignment of the former to the latter. The objective is the maximization of traffic handling capacity which, given the multitude of cells, is expressed as the maximization of a bottleneck capacity ratio. The capacity ratio for a cell is defined as the ratio of the number of radio frequencies assigned to the cell over the number of radio frequencies needed to meet blocking probability requirements. The solution to attain an optimal non-regular channel assignment is decomposed into two mathematical programs designated a Master Program and a Subprogram. These are solved iteratively with assistance from a channel set augmentation technique impelmented between solutions of the Master and Subprogram.

Abstract: A novel methodology is provided for managing neighbor channel interference in a cellular wireless communications system as a function of a service-quality factor for a communications channel within such a system. That methodology is characterized as Re-Use Partitioning with Neighbor-Channel Restrictions, and carries out the function of eliminating neighbor-channel interference between neighboring omni-directional cells.

Abstract: In a channel assignment system novel methodologies are utilized for managing channel interference in a cellular wireless communications system as a function of a service-quality factor for a communications channel within such a system. Those methodologies and their essential functions include: (1) Mixed Power Control for overcoming interference problems associated with conventional power control methods; (2) Directed Assignment for reducing channel conflicts between neighboring cells in non-congestion conditions; and (3) Mixed Power Control with Directed Assignment for reducing channel interference between neighboring cells.

Abstract: A self-configurable wireless system is provided which can determine its own channel assignments without the need for advance planning or human intervention. Such a system is implemented as an improvement to a wireless communications network having service areas partitioned into a plurality of cells, that improvement being implemented through a cooperative combination of: (1) a means for autonomously collecting data at the cells in respect to serving signal/interference measurements and other relevant data; and (2) a means for automatically carrying out a selected channel assignment algorithm in response to data provided by the data collecting means.

Abstract: In a transition phase of a cellular cell from analog-to-digital radio service it must be determined how many of the base station radios in a cell must be changed over from analog to digital, given the proportion of mobile phones with dual-mode capability to analog phones. A dual-mode mobile phone has the capability to interface with both analog and digital radios. In determining the radio mix, it is desirable to maximize the call handling capacity of a cell, or minimize the blocking experienced by the mobile subscribers. To address these questions, an analytical model is developed to compute the blocking rate experienced by mobile callers in a cell, given the cell's offered load, the mix of analog and dual-mode mobiles, and the analog-digital split of the RF channels available to the cell.

Abstract: A channel assignment system assigns channels to various cells by the optimal partitioning of the available radio frequencies into non-overlapping sets, the optimal grouping of co-user cells, and the best assignment of the former to the latter. The objective is the maximization of traffic handling capacity which, given the multitude of cells, is expressed as the maximization of a bottleneck capacity ratio. The capacity ratio for a cell is defined as the ratio of the number of radio frequencies assigned to the cell over the number of radio frequencies needed to meet blocking probability requirements. The solution to attain an optimal non-regular channel assignment is decomposed into two mathematical programs designated a Master Program and a Subprogram. These are solved iteratively with assistance from a channel set augmentation technique implemented between solutions of the Master and Subprogram.

Abstract: A channel assignment system allocates channels to various cells by the optimal partitioning of the available radio frequencies into non-overlapping sets, the optimal grouping of co-user cells, and the best allocation of the former to the latter. Maximization of traffic handling capacity is, for one embodiment, expressed as the maximization of a bottleneck capacity ratio, known as the capacity factor. The capacity ratio for a cell is defined as the ratio of the number of radio frequencies allocated to the cell over the number of radio frequencies needed to meet blocking probability requirements. Given a channel allocation, the latter is fixed once the traffic loads and desired blocking are specified. The solution to attain an optimal non-regular channel assignment is decomposed into two mathematical programs designated a Master Program and a Subprogram. These are solved iteratively with assistance from a channel set augmentation technique implemented between solutions of the Master and Subprogram.

Abstract: In a channel assignment system novel methodologies are utilized for managing channel interference in a cellular wireless communications system as a function of a service-quality factor for a communications channel within such a system. Those methodologies and their essential functions include: (1) Mixed Power Control for overcoming interference problems associated with conventional power control methods; (2) Directed Assignment for reducing channel conflicts between neighboring cells in non-congestion conditions; and (3) Mixed Power Control with Directed Assignment for reducing channel interference between neighboring cells.

Abstract: Novel methodologies are provided for managing neighbor channel interference in a cellular wireless communications system as a function of a service-quality factor for a communications channel within such a system. Those methodologies, and their essential function are characterized as:Even/Odd Cell Designation--for eliminating adjacent-channel conflicts within a cell;Vertical Channel-Set Construction--for eliminating adjacent-channel conflicts between abutting sectors in sectorized cells; andMinimum Adjacency Circuit Method--for reducing the number of adjacent edges between abutting cells or sectors in a regular channel assignment.

Abstract: A communications system and method of ordered borrowing which facilitates dynamic access to a global channel set that has been partitioned into subsets, with each cell of the system being assigned a particular subset of the channel set. The assignment of channel subsets is performed in such a way as to respect various constraints imposed by the physical layout. Calls originating in a cell are first assigned to the channels allocated to the base station of that cell, in an order determined by the cell. Once the allotted channels are exhausted, i.e. in the busy state, the cell attempts to borrow channels from those allotted to the base stations of neighboring cells in a specified order. The borrowing cell borrows a specified number of channels from each neighbor before returning to a particular cell to borrow additional channels. The channels borrowed from a neighbor are accessed in an order which is substantially the reverse of the order in which they are accessed by the owner cell.

Abstract: A channel assignment system assigns channels to various cells by the optimal partitioning of the available radio frequencies into non-overlapping sets, the optimal grouping of co-user cells, and the best assignment of the former to the latter. The objective is the maximization of traffic handling capacity which, given the multitude of cells, is expressed as the maximization of a bottleneck capacity ratio. The capacity ratio for a cell is defined as the ratio of the number of radio frequencies assigned to the cell over the number of radio frequencies needed to meet blocking probability requirements. The solution to attain an optimal non-regular channel assignment is decomposed into two mathematical programs designated a Master Program and a Subprogram. These are solved iteratively with assistance from a channel set augmentation technique impelmented between solutions of the Master and Subprogram.

Abstract: A method for enabling the service of mobilies by a microcell, in a two tier cellular system, involves identifying a microcell coverage area and offsetting microcell signal strength for a time sufficient to allow a fast moving vehicle, desiring service and having entered the microcell serving area, to exit the microcell coverage area before the call is set up or handed off forcing the controlling macrocell to handle the call setup or hand-off. Hence, only the mobile radiotelephones of stationary and relatively slow moving vehicles are served by the microcell. There is a substantially offset-coverage overlap period between the locations where a mobile may be found during the offset interval or duration of the apparent reduced signal strength of the microcell and the microcell coverage area. Calls that could be serviced by the microcell are instead serviced by the macrocell because the mobile radiotelephone responds to the strongest signal. This loss in capacity is solved by reducing the offset-coverage overlap.