Admission control method

A method for admission control in a cellular telecommunication system comprising at least one mobile station having a multidiversity connection, comprising the steps of:

• at least one of the following steps:
• setting, by an admission control entity, a bit error rate for outer loop power control;
• setting, by the admission control entity, a frame error rate for outer loop power control;
• and/or
• setting, by the admission control entity, initial signal-to-noise setpoints for outer loop power control;
• receiving a bearer request;
• checking current load;
• calculating a preliminary load estimate based at least on the current load and said bearer request;
• if said preliminary load estimate is lower than a predetermined limit, performing the steps of:
• admitting said bearer request;
• allocating transmission resources according to said request;
• and
• checking the resulting load;
• or
• if said preliminary load estimate is higher than said predetermined limit, performing the step of:
• attempting the release of transmission capacity resources of the cellular telecommunication system in order to bring the resulting load under said predetermined limit thereby allowing admittance of said requested bearer.

A method for admission control in a cellular telecommunication system comprising at least one mobile station having a multidiversity connection, comprising the steps of:

• setting, by an admission control entity, a power margin for transmission power of a multidiversity bearer of the mobile station having a specified quality of service;
• receiving a bearer request;
• checking current load;
• calculating a preliminary load estimate based at least on the current load and said bearer request;
• if said preliminary load estimate is lower than a predetermined limit, performing the steps of:
• admitting said bearer request;
• allocating transmission resources according to said request;
• and
• checking the resulting load;
• or
• if said preliminary load estimate is higher than said predetermined limit, performing the step of:
• attempting the release of transmission capacity resources of the cellular telecommunication system in order to bring the resulting load under said predetermined limit thereby allowing admittance of said requested bearer.

A cellular telecommunication system comprising:

• an admission control entity for controlling admissions of new bearers in a control area of the cellular telecommunication system, wherein, when said admission control entity receives a bearer request, said admission control entity checks a current load in the control area and calculates a preliminary load estimate based at least on the current load and said bearer request;
• and
• a power control entity for controlling power levels of mobile stations and base stations in the control area, for receiving an update message from the admission control entity after a new bearer has been admitted, for updating power levels to account for the changed transmission environment based on said update message, for receiving a command message from the admission control entity indicating that at least one power control parameter should be adjusted, and for transmitting an acknowledgement message to the admission control entity indicating that either a command message or an update message was received from the admission control entity;
• wherein, if said preliminary load estimate is lower than a predetermined limit, said bearer request is admitted and transmission resources of the control area are allocated according to said request, after which the admission control entity checks the resulting load in the control area;
• and
• wherein, if said preliminary load estimate is higher than said predetermined limit, the admission control entity attempts to release transmission capacity resources of the control area in order to bring the resulting load under said predetermined limit thereby allowing admittance of said requested bearer.

A cellular telecommunication system comprising:

• an admission control entity for controlling admissions of new bearers in a control area of the cellular telecommunication system, wherein, when said admission control entity receives a bearer request, said admission control entity checks a current load in the control area and calculates a preliminary load estimate based at least on the current load and said bearer request;
• and
• a handover control entity for controlling handovers between cells when a mobile station moves from one cell to another, for receiving an update message from the admission control entity after a new bearer has been admitted, for updating handover control parameters to account for the changed transmission environment based on said update message, for receiving a command message from the admission control entity indicating that at least one handover control parameter should be optimized, and for transmitting an acknowledgment message to the admission control entity indicating that either a command message or an update message was received from the admission control entity;
• wherein, if said preliminary load estimate is lower than a predetermined limit, said bearer request is admitted and transmission resources of the control area are allocated according to said request, after which the admission control entity checks the resulting load in the control area;
• and
• wherein, if said preliminary load estimate is higher than said predetermined limit, the admission control entity attempts to release transmission capacity resources of the control area in order to bring the resulting load under said predetermined limit thereby allowing admittance of said requested bearer.

A method for admission control in a control area of a cellular telecommunication system comprising the steps of:

• maintaining a priority hierarchy among requested and existing bearers;
• whenever a request for the admittance of a new bearer is received, estimating a result of the admittance of the new bearer on the available capacity of the control area;
• if the estimated results show that a stable load capacity threshold will not be exceeded by the admittance of the new bearer, admitting said bearer and allocating transmission resources according to said request;
• whenever a new bearer is admitted, determining an actual result of the admittance of the new bearer on the available capacity of the control area;
• and
• if either (i) the estimated results show that the stable load capacity threshold will be exceeded by the admittance of the new bearer, or (ii) the determined actual results show that the stable load capacity threshold was exceeded by the admittance of the new bearer, manipulating at least one cellular telecommunication system parameter of the control area in order to bring the load resulting from said manipulation under said stable load capacity limit, wherein the higher priority bearers are affected less than the lower priority bearers.

A method for admission control in a control area of a cellular telecommunication system comprising the steps of:

• whenever a request for the admittance of a new bearer is received, determining a probability that a load comprising existing bearers and the requested bearer would exceed a predetermined system reliability limit, according to the requirement that:
• PROB(Coc≧Ctot)≦γ
• where
• PROB=probability
• Coc=capacity occupied by bearers
• Ctot=total capacity of said control area
• γ=predetermined system reliability limit;
• if the estimated results show that the predetermined system reliability limit will not be exceeded by the admittance of the new bearer, admitting said bearer and allocating transmission resources according to said request;
• whenever a new bearer is admitted, determining an actual result of the admittance of the new bearer on the available capacity of the control area;
• and
• if either (i) the estimated results show that the stable load capacity threshold will be exceeded by the admittance of the new bearer, or (ii) the determined actual results show that the stable load capacity threshold was exceeded by the admittance of the new bearer, manipulating at least one cellular telecommunication system parameter of the control area in order to bring the load resulting from said manipulation under said stable load capacity limit.

A method for admission control in a control area of a cellular telecommunication system comprising the steps of:

• whenever a request for the admittance of a new bearer is received, determining whether an estimated load comprising existing bearers and the requested bearer would exceed a predetermined system capacity limit, according to the requirement that:
• Preq+Poc≦Pstable
• where
• Preq=transmission power of the requested bearer
• Poc=transmission power of existing bearers in the control area;
• Pstable=the upper limit of a stable load capacity for the control area;
• if the estimated results show that the predetermined system capacity limit will not be exceeded by the admittance of the new bearer, admitting said bearer and allocating transmission resources according to said request;
• whenever a new bearer is admitted, determining an actual result of the admittance of the new bearer on the available capacity of the control area;
• and
• if either (i) the estimated results show that the stable load capacity threshold will be exceeded by the admittance of the new bearer, or (ii) the determined actual results show that the stable load capacity threshold was exceeded by the admittance of the new bearer, manipulating at least one cellular telecommunication system parameter of the control area in order to bring the load resulting from said manipulation under said table load capacity limit.