Mobile communications system
First Claim
Patent Images
1. A method of operating a digital mobile radio communications system in which pilot symbols are used for channel equalisation and in which synchronisation symbols are used to indicate burst timings, the method comprising:
- using a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols in a transmission to indicate to a receiver the presence of stealing in the transmission;
including a normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols in a transmission when stealing is not present; and
when stealing is present, including the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols in the transmission in place of a normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols;
wherein the normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols is distinct from the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols;
wherein the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols is arranged to be distinguishable from the normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols prior to equalisation.
1 Assignment
0 Petitions
Accused Products
Abstract
A scheme for indicating the presence of stealing or other information in a digital mobile radio communications system. A sequence of pilot symbols and/or synchronization symbols that can be distinguished from a normal sequence of pilot symbols and/or synchronization symbols is included in a transmission to indicate the presence of stealing. A receiver determines whether a received transmission includes the stealing sequence or the normal sequence and decodes the transmission accordingly.
-
Citations
19 Claims
-
1. A method of operating a digital mobile radio communications system in which pilot symbols are used for channel equalisation and in which synchronisation symbols are used to indicate burst timings, the method comprising:
-
using a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols in a transmission to indicate to a receiver the presence of stealing in the transmission; including a normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols in a transmission when stealing is not present; and when stealing is present, including the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols in the transmission in place of a normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols; wherein the normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols is distinct from the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols; wherein the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols is arranged to be distinguishable from the normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols prior to equalisation. - View Dependent Claims (2, 3, 4)
-
-
5. A method of operating a digital mobile radio communications system in which pilot symbols are used for channel equalisation and in which synchronisation symbols are used to indicate burst timings, the method comprising:
-
determining whether a received transmission includes a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols indicative of the presence of stealing in the transmission; and if it is determined that a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols indicative of the presence of stealing is present in the received transmission, identifying the presence of stealing in the transmission and decoding the transmission accordingly. - View Dependent Claims (6, 7, 8)
-
-
9. A communications station for a digital mobile radio communications system in which pilot symbols are used for channel equalisation and in which synchronisation symbols are used to indicate burst timings, the communications station comprising:
a transmitter configured to include in a transmission a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols to indicate to a receiver the presence of stealing in the transmission wherein the transmitter is configured to; include a normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols in a transmission when stealing is not present; and when stealing is present, include the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols in the transmission in place of a normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols; wherein the normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols is distinct from the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols; wherein the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols is arranged to be distinguishable from the normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols prior to equalisation. - View Dependent Claims (10, 11, 12)
-
13. A digital mobile radio communications system in which pilot symbols are used for channel equalisation and in which synchronisation symbols are used to indicate burst timings, the system comprising:
a transmitter configured to include in a transmission a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols to indicate to a receiver the presence of stealing in the transmission wherein the transmitter is configured to; include a normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols in a transmission when stealing is not present; and when stealing is present, include the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols in the transmission in place of a normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols; wherein the normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols is distinct from the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols; wherein the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols is arranged to be distinguishable from the normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols prior to equalisation.
-
14. A communications station for a digital mobile radio communications system in which pilot symbols are used for channel equalisation and in which synchronisation symbols are used to indicate burst timings, the communications station comprising:
a receiver configured to determine whether a received transmission includes a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols indicative of the presence of stealing in the transmission, and to, if it is determined that a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols indicative of the presence of stealing is present in the received transmission, identify the presence of stealing in the transmission and decode the transmission accordingly. - View Dependent Claims (15, 16, 17)
-
18. A digital mobile radio communications system in which pilot symbols are used for channel equalisation and in which synchronisation symbols are used to indicate burst timings, the system comprising:
a receiver configured to determine whether a received transmission includes a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols indicative of the presence of stealing in the transmission, and to, if it is determined that a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols indicative of the presence of stealing is present in the received transmission, identify the presence of stealing in the transmission and decode the transmission accordingly.
-
19. A non-transitory computer program element comprising computer software code portions which when the program element is run on a data processor performs a method of operating a digital mobile radio communications system in which pilot symbols are used for channel equalisation and in which synchronisation symbols are used to indicate burst timings, the method comprising:
-
using a sequence of pilot symbols, a sequence of synchronisation symbols, or a sequence of pilot symbols and synchronisation symbols in a transmission to indicate to a receiver the presence of stealing in the transmission; including a normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols in a transmission when stealing is not present; and when stealing is present, including the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols in the transmission in place of a normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols; wherein the normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols is distinct from the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols; wherein the stealing sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols is arranged to be distinguishable from the normal sequence of pilot symbols, synchronisation symbols, or pilot symbols and synchronisation symbols prior to equalisation.
-
Specification