ATM policing device

Claim 2

For use with a transmission system, an admission device for admitting data cells provided with VC codes to a transmission medium, the admission device comprising: means for reading out the VC code of an arriving data cell, means for comparing a count value, which is a measure of a load of the data cell with said read out VC code, with a threshold value selected from a multiplicity of thresholds, on the basis of at least one sort code, and means for thereafter issuing an admission code having a value which depends on the result of the comparison by the means for comparing.

Claim 3

An admission device according to claim 1, wherein said at least one sort code is read out from the arriving data cell.

Claim 4

An admission device according to claim 2, wherein said at least one sort code is supplied to the admission device from a device located outside the admission device.

Claim 5

An admission device according to claim 1, wherein said at least one sort code is supplied to the admission device from a device located outside the admission device.

Claim 6

For use with a transmission system, an admission device for admitting data cells provided with VC codes to a transmission medium, the admission device comprising: means for reading out the VC code of an arriving data cell, means for comparing a count value, which is a measure of a load of the data cell with said read out VC code, with a threshold value selected from a multiplicity of thresholds, on the basis of at least one sort code, with at least part of each said sort code being a priority code, and means for thereafter issuing an admission code having a value which depends on the result of the comparison by the means for comparing.

Claim 7

For use with a transmission system, an admission device for admitting data cells provided with VC codes to a transmission medium, the admission device comprising: means for reading out the VC code of an arriving data cell, means for comparing a count value, which is a measure of a load of the data cell with said read out VC code, with a threshold value selected from a multiplicity of thresholds, on the basis of at least one sort code, with at least part of each said sort code being a priority code, and means for thereafter issuing an admission code having a value which depends on the result of the comparison by the means for comparing.

Claim 8

An admission device according to claim 5, wherein the data cells are ATM data cells, and at least part of each said sort code is formed by a Cell-Loss-Priority (CLP) code of the data cell.

Claim 9

For use with a transmission system, an admission device for admitting data cells provided with VC codes to a transmission medium, the admission device comprising: means for reading out the read out VC code of an arriving data cell, means for comparing a count value, which is a measure of a load of the data cell with said VC code, with a threshold value selected from a multiplicity of thresholds, on the basis of at least one sort code, with at least part of each said sort code formed by a code indicating whether the data cell is a user data cell intended for mainly transferring user information, or a system data cell intended for exclusively transferring control information or signalling information for said transmission system, and means for thereafter issuing an admission code having a value which depends on the result of the comparison by the means for comparing.

Claim 10

For use with a transmission system, an admission device for admitting data cells provided with VC codes to a transmission medium, the admission device comprising: means for reading out the read out VC code of an arriving data cell, means for comparing a count value, which is a measure of a load of the data cell with said VC code, with a threshold value selected from a multiplicity of thresholds, on the basis of at least one sort code, with at least part of each said sort code formed by a code indicating whether the data cell is a user data cell intended for mainly transferring user information, or a system data cell intended for exclusively transferring control information or signalling information for said transmission system, and means for thereafter issuing an admission code having a value which depends on the result of the comparison by the means for comparing.

Claim 11

An admission device according to claim 7, wherein the data cells are ATM data cells, and at least part of each said sort code is formed by a Payload Type Identifier (PTI) of the data cell.

Claim 12

For use with a transmission system, an admission device for admitting data cells provided with VC codes to a transmission medium, the admission device comprising: means for reading out the VC code of an arriving data cell, means for comparing a count value, which is a measure of a load of the data cell with said read out VC code, with a threshold value selected from a multiplicity of thresholds, on the basis of at least one sort code, with at least part of each said sort code a code indicating whether the data cell is, or is not, a last data cell from a series to one and the same frame of data cells, and means for thereafter issuing an admission code having a value which depends on the result of the comparison by the means for comparing.

Claim 13

For use with a transmission system, an admission device for admitting data cells provided with VC codes to a transmission medium, the admission device comprising: means for reading out the VC code of an arriving data cell, means for comparing a count value, which is a measure of a load of the data cell with said read out VC code, with a threshold value selected from a multiplicity of thresholds, on the basis of at least one sort code, with at least part of each said sort code a code indicating whether the data cell is, or is not, a last data cell from a series to one and the same frame of data cells, and means for thereafter issuing an admission code having a value which depends on the result of the comparison by the means for comparing.

Claim 14

An admission device according to claim 9, wherein the data cells are ATM data cells, and at least part of each said sort code is formed by a Payload Type Identifier (PTI) of the data cell.