摘要:
The present invention relates to a method and a communication network node for enabling automatic optimization of a random access preamble format usage in a communication network system. The network comprises the communication network node serving at least one cell to which user equipments are accessing. A random access preamble format is set for each cell and comprises a random access sequence length, TSEQ, and a random access preamble cyclic prefix length, TCP. First, the random access sequence length, TSEQ is selected and then the random access preamble cyclic prefix length, T CP is selected. Based on the selected random access sequence length, T SEQ and random access preamble cyclic prefix length, TCP, which random access preamble format to use in said cell is selected.
摘要:
The present invention relates to a method and a communication network node for enabling auto-tuning of preamble sequences used during random access procedures when user equipments (18) are accessing a communication network system comprising radio base stations (15) each serving at least one cell (19) and with which said user equipments (18) are communicating on uplink (13) and downlink (12) channels. An initial set of RACH preamble sequences in one cell of a radio base station (15) and statistics on RACH usage and information on identified RACH preamble sequences potentially conflicting between neighbours of said radio base station (15) is collected. The collected statistics is used for optimizing said set of RACH preamble sequences, whereby the initial set of RACH preamble sequences is replaced with the optimized set of RACH preamble sequences.
摘要:
The invention relates to methods and arrangements for handling handover-related parameters. A radio base station of a mobile communications network is arranged to serve at least a first cell, and to make handover decisions based on handover-related parameters. The radio base station comprises means for receiving handover related feedback from a radio base station serving a second cell after handover of a UE from said first cell to said second cell; means for using the handover related feedback received from the base station serving said second cell to adjust the handover-related parameters; and further by means for sending handover related feedback to a radio base station serving a second or another cell after handover of a UE to said first cell from said second or another cell.
摘要:
The present invention relates to a method and a communication network node for enabling automatic optimization of a random access preamble format usage in a communication network system. The network comprises the communication network node serving at least one cell to which user equipments are accessing. A random access preamble format is set for each cell and comprises a random access sequence length, TSEQ, and a random access preamble cyclic prefix length, TCP. First, the random access sequence length, TSEQ is selected and then the random access preamble cyclic prefix length, T CP is selected. Based on the selected random access sequence length, T SEQ and random access preamble cyclic prefix length, TCP, which random access preamble format to use in said cell is selected.
摘要:
The technology described automatically resolves cell identity collisions/conflicts in a cellular radio communications network. A detecting node determines that a first cell identifier associated with a first conflicting cell is the same as a second cell identifier associated with a second conflicting cell. One of the first and second conflicting cells is selected to change its cell identifier. A different cell identifier is determined for the selected cell. The different cell identifier is then provided to other cells and preferably to user equipment (UE) terminals without disrupting ongoing UE communications.
摘要:
The invention relates to methods and arrangements for handling handover-related parameters. A radio base station of a mobile communications network is arranged to serve at least a first cell, and to make handover decisions based on handover-related parameters. The radio base station comprises means for receiving handover related feedback from a radio base station serving a second cell after handover of a UE from said first cell to said second cell; means for using the handover related feedback received from the base station serving said second cell to adjust the handover-related parameters; and further by means for sending handover related feedback to a radio base station serving a second or another cell after handover of a UE to said first cell from said second or another cell.
摘要:
In a cellular radio system a message indicating a change of cell size can be transmitted to a number of affected cells, in particular, neighboring cells. The affected cells receiving such a message can be adapted to use the information in the message when determining self-optimization parameters used for control purposes. Hereby, better response times can be achieved without reducing noise sensitivity.
摘要:
A method of signalling a set cell identities in a cellular radio system from a transmitter to a receiver is provided. The method includes coding of a sequence of cell identities using a range indicator. The coded sequence is then signalling using the coded sequence. The range indicator can be an range indicator or an explicit range indicator.
摘要:
A device obtains a service change associated with a cell in a radio network, and identifies helper cells in the radio network that need new random access channel (RACH) parameters due to the service change. The device also determines a RACH parameters configuration for the helper cells, and configures the helper cells with the determined RACH parameters configuration.
摘要:
A radio terminal connection may be handed over from a serving base station associated with a serving cell to a closed subscriber group (CSG) cell served by a CSG base station in which only radio terminals belonging to the CSG are permitted to access and receive service from the CSG cell. Radio terminals in the serving cell are generally informed not to report to the serving base station signal quality measurements of signals transmitted by CSG base stations. But if a radio terminal in the serving cell is authorized to access and receive service from the CSG cell, then that radio terminal is instructed to report to the serving base station signal quality measurements of signals transmitted by the CSG base station. Based on that report, the connection may be handed over to the CSG base station. A central node provides a CSG authorization list identifying CSG authorized radio terminals to the serving base station when a listed CSG cell is a neighboring cell which the radio terminal is authorized to access.