In a wireless communication system, radio resources are dynamically assigned among a plurality of intercoupled base stations based upon historical loading to reduce both localized and system interference. A plurality of loading intervals are first determined that span a loading interval sequence. The loading intervals may correspond to time based periods such as fifteen-minute, thirty-minute, hour or other time intervals. The loading interval sequence may correspond to a weekday, a weekend day or such other loading period within which loading resembles a pattern. Based upon estimated loading for the loading interval, a number of channels required to service load for the loading interval are made to meet a minimal service level is determined. An initial assignment of channels among the cells/sectors of the base stations of the wireless communication system is then made to satisfy localized radio interference criteria. Such an assignment will typically be made to preclude local reuse of channels. Then, the assignments are reconsidered from the standpoint of system interference and the channels are reassigned to minimize system interference. In reassigning channels among the cells/sectors, radio propagation and, cell/sector proximity are considered so as to most accurately predict performance when the assignments are implemented. Once the channel assignments have been determined for the loading interval sequence(s), the wireless communication system is operated according to the channel assignments.

Dynamic radio resource allocation in a wireless communication system

A method and system (200) for dynamic rate switching via medium access channel layer signaling (208) is disclosed, wherein data rates for high data rate channels are automatically shifted up or down based on a predetermined metric. In a preferred embodiment, data rates are automatically shifted up or down based on transmit channel gain required to maintain a required signal to noise ratio.

Method of dynamic transmit scheduling using channel quality feedback

Without intercell coordination on a per communication request basis, channel assignment can be efficiently performed by developing for each cell, or a sector thereof when the cells are sectorized using directional antennas, a priority list of groups of channels, and selecting a channel to be assigned in response to a request for service from the highest priority group which has available channels at the time of the service request. The priority lists are developed based on various interference measurements that are made. The priority lists tend to remain the same for relatively long periods of time. However, periodically, the priority lists should be redetermined to insure that the best lists are being employed. For example the lists may need to be changed due to new construction or to seasonal vegetation changes which may affect the interference experienced in the system. Advantageously, system capacity under peak concentrated load conditions may increase. This advantage is further magnified under field conditions for which the cell shapes are not ideal.

Distributed channel assignment method

The base station of a cellular radio system is in radio communication with the mobile stations of the cellular radio system by using mutually essentially orthogonal channels. In order to control the use of the channels, said channels are divided into groups with different priorities, so that the base station uses primarily the channel group with the highest priority. Channels belonging to different priority groups are put to use in a selective manner as a response to the loading of the base station.

Channel allocation in the base stations of a cellular radio system

The present invention is directed to a method and apparatus for assigning channels in a cellular environment. A time period T is defined in which cellular operational measurement information such as traffic information and mobility information are collected. Channels that are available for allocation are collected and maintained in a matrix. The predicted number of channels are calculated based on the operational measurement information. Using the channels available for allocation and the predicted number of channels, channels are allocated for use. As the operational measurement information changes the time period T is adjusted to accommodate the changes in traffic or mobility within the cellular system.

Method and apparatus for the self engineering of adaptive channel allocation

The invention concerns a process for dynamic channel allocation in mobile radio networks, wherein priorities which are increased or decreased in dependence on interference occurring in the channel concerned are established for the individual channels. When the propagation conditions are satisfactory, channels with low priority can be allocated. The mean of values dependent on the extent of interference can be formed in order to increase and decrease the priority. In addition, various priority lists can be established for various interference and/or load situations.

Process for dynamic channel allocation in mobile radio networks

Bei einem Verfahren zur dynamischen Kanalzuteilung in Mobilfunknetzen, wobei fur die einzelnen Kanale Prioritaten festgesetzt werden, die in Abhangigkeit von in dem jeweiligen Kanal auftretenden Interferenzen erhoht oder vermindert werden, konnen bei guten Ausbreitungsbedingungen Kanale mit niedrigerer Prioritat belegt werden. Zur Erhohung und Verminderung der Prioritat kann eine Mittelwertbildung einer vom Ausmas der Interferenzen abhangigen Grose erfolgen. Auserdem konnen fur verschiedene Interferenz- und/oder Lastsituationen verschiedene Prioritatenlisten gefuhrt werden.

Schoenborn Michael

Papers

Process for dynamic channel allocation in mobile radio networks

Verfahren zur dynamischen kanalzuteilung in mobilfunknetzen

Verfahren zur dynamischen Kanalzuteilung in Mobilfunknetzen A method for dynamic channel allocation in cellular networks