Method for increasing the endurance of an information receiver, particularly for radio paging, and corresponding receiver

Claim 3

A method according to claim 1, in which each receiver is allocated a unique identifier consisting of a plurality of information items (a, b, c, d, e, f), one of which (f) produces a correspondence between the receiver and its group, characterized in that at least one additional information item (e), for example two (d, e), of the identifier are used to form a correspondence between the receiver and its sub-group.

Claim 4

A method according to claim 2, characterized in that two additional information items (d, e) of the identifier are used to form the said correspondence between the receiver and its sub-group, the possible messages concerning receivers of a first part of the sub-groups being transported within the time interval (I 3 ) of a first frame (T 1 ), and the possible messages concerning the receivers of the remaining part of the sub-groups being transported within the corresponding time interval (I 3 ) of the following frame (T 2 ).

Claim 5

A method according to claim 1, characterized in that an n-bit word is used as service information (IS), n being equal to the number of sub-groups, each bit being associated in a one-to-one way with a sub-group, and the analysis of the service information within each receiver includes the analysis of the value of the bit associated with the sub-group to which the receiver belongs.

Claim 6

A method according to claim 1, characterized in that the receivers of the sub-groups designated by the service information (IS) are kept activated (34) throughout the duration of the corresponding allotted time interval.

Claim 7

A method according to one of claim 1, characterized in that the sub-groups are ordered within each group, and, with the various sub-groups, there are respectively associated respective time sub-intervals (Ij i ) of the time interval, ordered in the same way, and within each of which the possible messages are sent, intended for one or more receivers of the sub-group concerned, and in that the receivers of the sub-groups designated (SG 3 ) by the service information are de-activated (35) until the corresponding time subintervals (Ij 3 ) occur.

Claim 8

A method according to claim 1, wherein a receiver not belonging to one of the designated subgroups is de-activated just after analysis of the service information.

Claim 9

A method according to claim 2, wherein one of the information items (a) of the identifier has a value greater than 9 and is coded in hexadecimal.

Claim 10

A method according to claim 3, wherein the sub-groups are ordered within each group, and, with the various sub-groups, there are respectively associated respective time subintervals of the time interval, ordered in the same way, and within each of which the possible messages are sent, intended for one or more receivers of the sub-group concerned, and wherein the receivers of the sub-groups designated by the service information are de-activated until the corresponding time sub-intervals occur.

Claim 11

A free-standing information receiver, particularly radio-paging receiver, the said-information being transmitted on a carrier signal within a plurality of successive time frames each partitioned into a predetermined number of intervals, each of which is allotted to a predetermined group of receivers, comprising control means (16) to activate the receivers(i) at the start of the corresponding allotted time interval (I 3 ) of each frame in order to authorize processing of the information transported on the carrier signal, characterized in that it comprises a memory (15) containing data for identification (e) of the receiver making it possible to associate the receiver (1) with a predetermined sub-group (SG 3 ) of receivers within the corresponding group, and analysis means (13), in the course of the allotted time interval, to receive service information (IS) designating one or more sub-groups and to carry out analysis processing of this service information having regard to the identification data (e), and in that the control means (16) de-activate the receiver (1) before the end of the time interval (I 3 ) in the event of disagreement between the identification data and the service information.

Claim 12

A free-standing information receiver, particularly radio-paging receiver, the said-information being transmitted on a carrier signal within a plurality of successive time frames each partitioned into a predetermined number of intervals, each of which is allotted to a predetermined group of receivers, comprising control means (16) to activate the receivers(i) at the start of the corresponding allotted time interval (I 3 ) of each frame in order to authorize processing of the information transported on the carrier signal, characterized in that it comprises a memory (15) containing data for identification (e) of the receiver making it possible to associate the receiver (1) with a predetermined sub-group (SG 3 ) of receivers within the corresponding group, and analysis means (13), in the course of the allotted time interval, to receive service information (IS) designating one or more sub-groups and to carry out analysis processing of this service information having regard to the identification data (e), and in that the control means (16) de-activate the receiver (1) before the end of the time interval (I 3 ) in the event of disagreement between the identification data and the service information.

Claim 13

A receiver according to claim 10, characterized in that the memory contains an identifier allocated in a one-to-one way to the receiver, and including a plurality of information items (a, b, c, d, e, f) one of which (f) determines the group, and in that the identification data is formed from at least one additional information item of the identifier, for example two (d e).

Claim 14

A receiver according to claim 1, characterized in that the service information (IS) includes an n-bit word, n being equal to the number of sub-groups, each bit being associated in a one-to-one way with a sub-group, and in that the analysis means of each receiver are able to analyse the value of the bit associated with the sub-group to which the receiver belongs, so as to determine whether the receiver belongs to a designated sub-group or not.

Claim 15

A receiver according to claim 10, characterized in that the control means (16) are able to keep the receivers of the designated sub-groups activated, throughout the duration of the time interval (I 3 ).

Claim 16

A receiver according to claim 10, characterized in that the control means (16) are able, in the course of the time interval, after analysis of the service information, momentarily to de-activate the receivers of at least some of the sub-groups designated by the said service information.

Claim 17

A receiver according to claim 11, characterized in that one of the information items (a) of the identifier has a value greater than 9 and is coded in hexadecimal.

Claim 18

A receiver according to claim 10, wherein the control means de-activate the receiver not belonging to one of the designated subgroups just after analysis of the service information in the event of disagreement between the identification data and the service information.

Claim 19

A receiver according to claim 10, wherein the sub-groups are ordered within each group, and, with the various sub-groups, there are respectively associated respective time sub-intervals of the time interval, ordered in the same way, and within each of which the possible messages are sent, intended for one or more receivers of the sub-group concerned, and wherein the receivers of the sub-groups designated by the service information are de-activated until the corresponding time sub-intervals occur.

Claim 20

A receiver according to claim 11, wherein the sub-groups are ordered within each group, and, with the various sub-groups, there are respectively associated respective time sub-intervals of the time interval, ordered in the same way, and within each of which the possible messages are sent, intended for one or more receivers of the sub-group concerned, and wherein the receivers of the sub-groups designated by the service information are de-activated until the corresponding time sub-intervals occur.