Arrangement for defining a transmission delay in a subscriber network

Claim 2

An arrangement for determining transmission delays in a subscriber network, comprising: a plurality of subscriber sets; a plurality of subscriber terminals; each said subscriber terminal being connected to at least one said subscriber set by a respective transmission connection; a central unit which is common to all of said subscriber terminals and connects said subscriber sets to a public switched telephone network; said subscriber network being arranged such that time-division data transmissions, when made between said subscriber terminals and said central unit, occur along a common transmission path; said subscriber network being arranged for determining a respective value representing a respective transmission delay between said central unit and each respective said subscriber terminal; said subscriber network being arranged such that transmissions from respective ones of said subscriber terminals towards said central unit are synchronized in the respective subscriber terminals, with a frame structure of a respective signal to be transmitted from said central unit towards the respective subscriber terminal; said subscriber network being arranged such that for determining each respective said transmission delay, a respective message is sent only from the respective subscriber terminal towards said central unit, in a respective message transmission time slot having a predetermined position in a transmission frame in a corresponding transmission direction; and said central unit is arranged to perform a determination of the respective value representing the respective transmission delay, from a respective said message sent by the respective subscriber terminal in a respective said message transmission time slot, by measuring the location of a respective received message in relation to said frame structure of the respective said signal transmitted from said central unit towards the respective said subscriber terminal.

Claim 3

The arrangement according to claim 1, wherein: said central unit is arranged to adjust transmission postponement of respective individual ones of said subscriber terminals by means of the respective said value representing the respective said transmission delay.

Claim 4

The arrangement according to claim 2, wherein: said central unit is arranged always to perform a respective said determination from a respective initial message for establishing a respective connection, the respective said initial message informing of an offhook state of a respective said subscriber terminal.

Claim 5

The arrangement according to claim 3, wherein: each said subscriber terminal is arranged to repeat the respective said initial message.

Claim 6

The arrangement according to claim 2, wherein: said central unit includes a correlator arranged for a respective alignment word including in each said initial message in determining the respective said value representing the respective said transmission delay.

Claim 7

The arrangement according to claim 5, wherein: said subscriber network is arranged to provide a respective said alignment word only in a respective said message to be transmitted at a starting stage of a respective said transmission connection.

Claim 8

The arrangement, according to claim 6, wherein: said subscriber network is arranged to replace the respective said alignment word in respective messages following respective said starting stage messages, by a respective said data field section, immediately after a respective transmission postponement of a respective said subscriber terminal has been adjusted by said central unit.

Claim 9

The arrangement according to claim 7, wherein: said central unit is arranged to adjust each said transmission postponement by iterating.

Claim 12

The method according to claim 9, further comprising: the central unit adjusting transmission postponement of each said subscriber terminal based on the respective said value.

Claim 13

The method according to claim 10, comprising: always performing said determining from a respective initial said message made for establishing a respective said connection, each said initial message being one informing of an offhook state of a respective said subscriber terminal.

Claim 14

The method according to claim 11, further comprising: each said subscriber terminal repeating the respective said initial message.

Claim 15

The method according to claim 10, further comprising: using a correlator detecting a respective alignment word including in the respective said message for determining the respective said value.

Claim 16

The method according to claim 13, further comprising: using the respective said alignment word only in the respective said message when transmitted at the starting state of a respective said connection.

Claim 17

The method according to claim 14, further comprising: replacing respective said alignment word in respective messages following respective said initial messages, by a data field section immediately after the respective transmission postponement of a respective said subscriber terminal has been adjusted by said central unit.

Claim 18

The method according to claim 15, wherein: said adjusting is performed by iterating.

Claim 19

An arrangement for determining transmission delays in a subscriber network, comprising: a telephone exchange of a public switched telephone network; a plurality of subscriber sets; plurality of subscriber terminals; each said subscriber terminal being connected to at least one said subscriber set by a respective wired transmission connection; a central unit which is common to all of said subscriber terminals and connects said subscriber sets to said telephone exchange; said subscriber network being arranged such that time-division data transmissions, when made between said subscriber terminals and said central unit, occur along a common transmission path; said subscriber network being arranged for determining a respective value representing a respective transmission delay between said central unit and each respective said subscriber terminal; said subscriber network being arranged such that transmission from respective ones of said subscriber terminals towards said central unit are synchronized in the respective subscriber terminals, with a frame structure of a respective signal to be transmitted from said central unit towards the respective subscriber terminal; said subscriber network being arranged such that for determining each respective said transmission delay, a respective initial message indicating an offhook state is sent from the respective subscriber terminal towards said central unit for establishing a respective connection, in a respective message transmission time slot having a predetermined position in a transmission frame in a corresponding transmission direction; and said central unit being arranged to perform a determination of the respective value representing the respective transmission delay, from a respective said initial message sent by the respective subscriber terminal in a respective said message transmission time slot, by measuring the location of a respective received message in relation to said frame structure of the respective said signal transmitted from said central unit towards the respective said subscriber terminal.

Claim 20

An arrangement for determining transmission delays in a subscriber network, comprising: a telephone exchange of a public switched telephone network; a plurality of subscriber sets; plurality of subscriber terminals; each said subscriber terminal being connected to at least one said subscriber set by a respective wired transmission connection; a central unit which is common to all of said subscriber terminals and connects said subscriber sets to said telephone exchange; said subscriber network being arranged such that time-division data transmissions, when made between said subscriber terminals and said central unit, occur along a common transmission path; said subscriber network being arranged for determining a respective value representing a respective transmission delay between said central unit and each respective said subscriber terminal; said subscriber network being arranged such that transmission from respective ones of said subscriber terminals towards said central unit are synchronized in the respective subscriber terminals, with a frame structure of a respective signal to be transmitted from said central unit towards the respective subscriber terminal; said subscriber network being arranged such that for determining each respective said transmission delay, a respective initial message indicating an offhook state is sent from the respective subscriber terminal towards said central unit for establishing a respective connection, in a respective message transmission time slot having a predetermined position in a transmission frame in a corresponding transmission direction; and said central unit being arranged to perform a determination of the respective value representing the respective transmission delay, from a respective said initial message sent by the respective subscriber terminal in a respective said message transmission time slot, by measuring the location of a respective received message in relation to said frame structure of the respective said signal transmitted from said central unit towards the respective said subscriber terminal.

Claim 21

An arrangement for determining transmission delays in a subscriber network, comprising: a telephone exchange of a public switched telephone network; a plurality of subscriber sets; plurality of subscriber terminals; each said subscriber terminal being connected to at least one said subscriber set by a respective wired transmission connection; a central unit which is common to all of said subscriber terminals and connects said subscriber sets to said telephone exchange; said subscriber network being arranged such that time-division data transmissions, when made between said subscriber terminals and said central unit, occur along a common land-line transmission path; said subscriber network being arranged for determining a respective value representing a respective transmission delay between said central unit and each respective said subscriber terminal; said subscriber network being arranged such that transmissions from respective ones of said subscriber terminals towards said central unit are synchronized in the respective subscriber terminals, with a frame structure of a respective signal to be transmitted from said central unit towards the respective subscriber terminal; said subscriber network being arranged such that for determining each respective said transmission delay, a respective initial message indicating an off-hook state is sent from the respective subscriber terminal towards said central unit for establishing a respective connection, in a respective message transmission time slot having a predetermined position in a transmission frame in a corresponding transmission direction; and said central unit being arranged to perform a determination of the respective value representing the respective transmission delay, from a respective said initial message sent by the respective subscriber terminal in a respective said message transmission time slot, by measuring the location of a respective received message in relation to said frame structure of the respective said signal transmitted from said central unit towards the respective said subscriber terminal.

Claim 22

An arrangement for determining transmission delays in a subscriber network, comprising: a telephone exchange of a public switched telephone network; a plurality of subscriber sets; plurality of subscriber terminals; each said subscriber terminal being connected to at least one said subscriber set by a respective wired transmission connection; a central unit which is common to all of said subscriber terminals and connects said subscriber sets to said telephone exchange; said subscriber network being arranged such that time-division data transmissions, when made between said subscriber terminals and said central unit, occur along a common land-line transmission path; said subscriber network being arranged for determining a respective value representing a respective transmission delay between said central unit and each respective said subscriber terminal; said subscriber network being arranged such that transmissions from respective ones of said subscriber terminals towards said central unit are synchronized in the respective subscriber terminals, with a frame structure of a respective signal to be transmitted from said central unit towards the respective subscriber terminal; said subscriber network being arranged such that for determining each respective said transmission delay, a respective initial message indicating an off-hook state is sent from the respective subscriber terminal towards said central unit for establishing a respective connection, in a respective message transmission time slot having a predetermined position in a transmission frame in a corresponding transmission direction; and said central unit being arranged to perform a determination of the respective value representing the respective transmission delay, from a respective said initial message sent by the respective subscriber terminal in a respective said message transmission time slot, by measuring the location of a respective received message in relation to said frame structure of the respective said signal transmitted from said central unit towards the respective said subscriber terminal.

Claim 23

An arrangement for determining transmission delays in a wireless subscriber network, comprising: a telephone exchange of a public switched telephone network; a plurality of wireless subscriber sets; plurality of wireless subscriber terminals; each said subscriber terminal being connected to at least one said subscriber set by a respective wired transmission connection; a central unit which is common to all of said wireless subscriber terminals and connects said subscriber sets to said telephone exchange; said subscriber network being arranged such that time-division data transmissions, when made between said wireless subscriber terminals and said central unit, occur along a common wireless transmission path; said subscriber network being arranged for determining a respective value representing a respective transmission delay between said central unit and each respective said wireless subscriber terminal; said subscriber network being arranged such that transmissions from respective ones of said wireless subscriber terminals towards said central unit are synchronized in the respective wireless subscriber terminals, with a frame structure of a respective signal to be transmitted from said central unit towards the respective wireless subscriber terminal; said subscriber network being arranged such that for determining each respective said transmission delay, a respective initial message indicating an off-hook state is sent from the respective subscriber terminal towards said central unit for establishing a respective connection, in a respective message transmission time slot having a predetermined position in a transmission frame in a corresponding transmission direction; and said central unit being arranged to perform a determination of the respective value representing the respective transmission delay, from a respective said initial message sent by the respective subscriber terminal in a respective said message transmission time slot, by measuring the location of a respective received message in relation to said frame structure of the respective said signal transmitted from said central unit towards the respective said subscriber terminal.

Claim 24

An arrangement for determining transmission delays in a wireless subscriber network, comprising: a telephone exchange of a public switched telephone network; a plurality of wireless subscriber sets; plurality of wireless subscriber terminals; each said subscriber terminal being connected to at least one said subscriber set by a respective wired transmission connection; a central unit which is common to all of said wireless subscriber terminals and connects said subscriber sets to said telephone exchange; said subscriber network being arranged such that time-division data transmissions, when made between said wireless subscriber terminals and said central unit, occur along a common wireless transmission path; said subscriber network being arranged for determining a respective value representing a respective transmission delay between said central unit and each respective said wireless subscriber terminal; said subscriber network being arranged such that transmissions from respective ones of said wireless subscriber terminals towards said central unit are synchronized in the respective wireless subscriber terminals, with a frame structure of a respective signal to be transmitted from said central unit towards the respective wireless subscriber terminal; said subscriber network being arranged such that for determining each respective said transmission delay, a respective initial message indicating an off-hook state is sent from the respective subscriber terminal towards said central unit for establishing a respective connection, in a respective message transmission time slot having a predetermined position in a transmission frame in a corresponding transmission direction; and said central unit being arranged to perform a determination of the respective value representing the respective transmission delay, from a respective said initial message sent by the respective subscriber terminal in a respective said message transmission time slot, by measuring the location of a respective received message in relation to said frame structure of the respective said signal transmitted from said central unit towards the respective said subscriber terminal.