Indian Patents. 251757:A METHOD, A SYSTEM, A BASE STATION NODE AND A MOBILE STATION NODE FOR INTERCHANGING RADIO COMMUNICATION IN A MULTICARRIER WIRELESS TELECOMMUNICATION SYSTEM

Title of Invention	A METHOD, A SYSTEM, A BASE STATION NODE AND A MOBILE STATION NODE FOR INTERCHANGING RADIO COMMUNICATION IN A MULTICARRIER WIRELESS TELECOMMUNICATION SYSTEM
Abstract	The invention relates to bandwidth signalling in a multicarrier wireless telecommunication system. The information is transferred in the band itself (bold carriers) and contains information of the size (f2-f1) and location (f1,f2) of the band (I). The information is repeated in a number of carriers (bold) through out the band.

Full Text	TECHNICAL FIELD The present invention relates to signalling of available bandwidth especially in multicarrier wireless telecommunication systems. BACKGROUND A tendency of new wireless telecommunication systems is that they often require more bandwidth than existing systems, as new and more demanding services are likely to be introduced by the new systems. However, the available spectrum is limited and it is difficult to identify new spectrum for new communication systems, especially if the new spectrum shall be identical in all different regions of the world. This calls for a need of flexibility with respect to spectrum usage in the sense that pieces of radio spectrum of different size and in different frequency bands should be used with basically the same radio air interface. For the sake of example, assume that the most demanding applications require that the system bandwidth needs to be 100 MHz. International standardisation and regulatory bodies will therefore have to make sure that there will be ample spectrum available so that a number of 100 MHz bands could be offered to the customers. However, it is also likely that certain regions will have smaller pieces of spectrum available here and there that are smaller than 100 MHz, say a 30 MHz band in one region and a 66 MHz band in another. One possibility is to design many different air interfaces for a number of bandwidths - say 30, 66 and 100 MHz - and let the base stations and mobile users choose one or several of them depending on the situation, say a 25 MHz air interface for the 30 MHz band, a 50 MHz interface for the 66 MHz band and 100 MHz interface for the 100 MHz band. This however leaves some parts of the spectrum unused: 5 MHz in the 30 MHz band and 16 MHz in the 66 MHz band, while the 100 MHz band is fully used. Even if there is a high degree of commonality between different air interfaces, the complexity of equipment with several air interfaces will be significantly larger than if only one air interface can be used instead. Another suggestion for better usage of available frequency spectrum is to let several operators share spectrum or rent or buy resources from each other. SUMMARY OF THE INVENTION The proposals and ideas referred to above suffers from a number of drawbacks. Already mentioned is that using different air interfaces in several parts of the spectrum causes greater complexity. Another is that available pieces of spectrum might be too big for certain applications, which leads to a waste of resources. Still another problem is how to inform the users of the existence and extent of free spectrum for a certain application at a certain moment in a certain location area. In other words there is a need for greater flexibility and fast allocation of resources whenever the users so request. The solution is presented in the appended claims relating to a method and means for signalling the availability of spectrum in terms of bandwidth and location. The invention is advantageously implemented in wireless multicarrier system where the total maximum bandwidth is made up of a large number of narrowband sub carriers like for example in Orthogonal Frequency Divisional Multiplexing, OFDM, Interleaved Frequency Divisional Multiplex, IFDM or similar. In OFDM and IFDM the sub carriers are ideally mutually orthogonal. Generally, very similar systems can be designed with pulse shapes that make the sub carriers slightly non-orthogonal but that have other good properties, for example better spectral properties. This difference does not have a bearing on the invention so when OFDM is mentioned in the examples below, also these other more general types of systems are applicable. The only thing that is important is that the system consists of a large number of sub carriers. With a multicarrier system it is easy to adjust the used system bandwidth by simply switching off some blocks of sub carriers. However, a problem with this solution is how to inform the mobiles about the size and location of the spectrum that is currently used by the communication system. The invention described here solves this problem by including this size and location information within the sub carriers blocks themselves. The information about which set of downlink carriers in a block that is available is sent downlink from the base station on an acquisition channel, a broadcasting channel or some other cell covering channel. At least one easily detected downlink channel must be transmitted which is within an operational band known to the mobile user and contains information about where this operational band starts and stops relative to the location of said downlink channel. It is enough if the user has a rough idea of where the operational band can be found. This kind of rough information could have been broadcasted to the user in an earlier cell search. The format of the information about the size and location of the operational band could vary. Here are some examples: • A start and stop frequency or frequency number is given absolutely or relative to the location of the channel containing this information. • A start frequency or frequency number is given, absolutely or relatively specified, plus a number of maximum carriers or a fraction of that number. • An identifying number where said identifying number identifies an operational bandwidth from a list of predefined operational bandwidths. • The information about the location in spectrum could be explicitly signalled or implicitly derived by synchronisation signals. • As soon as the mobile is informed of the available resources it may access a suitable channel representing its needs in the normal way well known to a person skilled in the art. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS The invention, together with further aspects and advantages is exemplified by reference to a number of embodiments and accompanying drawings wherein: Fig 1 shows a frequency spectrum exemplifying bands available in a typical situation. Fig 2 is an overview of the system according to the invention. Fig 3 is a flow chart showing the steps of the invention in a further embodiment. DETAILED DESCRIPTION In Fig 1 a typical spectrum is shown, divided into three blocks or operational bands, I, II and III of 100 MHz, the maximal system bandwidth in this example. The spectrum is partly shared by two operators A and B. A has part I and B has part III while part II is shared between the both operators. It is assumed that, by negotiation between the operators, the border b between A and B is changed from time to time depending on the demand from the subscribers of A and B respectively. The sharing distribution could of course be different. Fig 1 is just an example. N is the number of sub carriers in each part. Lets assume that the 100 MHz band is divided into 4096 sub carriers of about 25 kHz each, (i.e. JV=4096). In theory any number N could be activated making a large number of air interface bandwidths possible using just one air interface. This is a basic property of these types of systems. An operator can, at different moments, have say 1000, 2000 or 4000 carriers to its disposal, varying with the demands and behaviours of the subscribers. Assume that the mobile user knows or can guess the approximate location of all N carriers. First the mobile user must detect the presence of one or more acquisition channel(s) for cell search purposes. Such channels are designed so that there is a very small probability to mistake them for other types of signals, or for other types of signals to be mistaken for acquisition signals. In general the user must scan all possible locations to find this signal in order to unambiguously find one. Then the mobile knows that this channel lies within the operational bandwidth. After that, the information in this acquisition channel about the size and location of the actual carrier set is read. As an example, the acquisition channel is represented by one or more of the bold marked carriers of block I in Fig 1. Then the information on the acquisition channel tells the user that the band starts at fl and stops at f2 and that the bandwidth is f2 — fl. Alternatively, based on acquisition channel information, the mobile finds another channel that broadcasts control of the system, and reads the bandwidth information there or part could be read from an acquisition channel and part from another channel that transmits broadcast control information. The system information bold marked carriers are spread out among all possible sub bands of the operational band. Operator A 's signalling is as follows: in the three bold sub carriers to the left in block I, information says that the bandwidth is 100 MHz and all sub bands are used i.e. the whole 100 MHz band, the next three defines a bandwidth of about 70 MHz in block II. Operator B's signalling is as follows: The single bold sub carrier defines a ca 30 MHz system bandwidth in block II, and the next three in block III define a full 100 MHz bandwidth. Included in Fig 1 is a piece of unused spectrum in block II that comprises a few sub carriers that act as a guard band between the two generally unsynchronised and uncoordinated operators. This is sometimes beneficial in order to reduce the disturbances between the transmitted signals belonging to the two neighbouring sub bands If the operators, in some real time resource exchange or the like, decide that all bandwidth in the second block II should go to operator A, then operator B simply gracefully finalises or reallocates traffic from the allotted carriers in this block, signals that the resource in block II is closed for random access attempts, and stops transmitting in this band, while operator A starts to signal that the entire 100 MHz block is now available for its subscribers. Since the terminals periodically read bandwidth information from the downlink control channels, this process could be made very quickly, in the order of milliseconds. Also, the terminals have or could have a full bandwidth detector running which makes it trivial to quickly start (de-) multiplexing data (from) to the newly available sub carriers. In Fig 1 the bandwidth information is repeated in every forth carrier for illustrative purposes as mentioned above. In practice, however, the distribution is much more thinly spread out in order not to waste bandwidth. In a 4096 carrier band the information may be carried on every 128th or 256th carrier occupying less than one percent of the total bandwidth. In Fig 2 an overview of the system according to the invention is shown. A traffic control centre, TCC, is connected over suitable interfaces to a number of base station transceivers BS, only one shown in the figure. The base stations have connections with several mobile stations, MSI and MS2. The TCC has an over all control of the traffic in the system and one of its tasks is to collect information about the availability of bandwidth of particular parts of radio spectrum used in the system. The information is transferred to the base stations and from there transmitted on a broadcast channel or the like to the users, MS. The TCC is connected to public networks like the Internet. The TCC may also have connections with other TCCs belonging to other operators and after negotiations taking over smaller or greater parts of spectrum from each other. A user, MSI in Fig 2 for example, entering the location area of the system scans the broadcast channel(s) sent out by the base station for information about available bandwidth and location in the spectrum according to the invention. MSI, having received the information in receiver R, stores it into a memory M. After entering the scanning is repeatedly performed for changing conditions and the memory is updated. The invention solves the problem of the need for the mobiles to have knowledge of available bandwidth. The knowledge is collected from a search of the radio environment for the available resources by detecting system information stored in certain sub carriers in the multicarrier operational bands. In Fig 3, a method for downloading information using the invention is illustrated as a number of steps. In step I, a mobile station, MS, has a need for a multicarrier band with N carriers for the downloading. The MS searches the radio interface in step II. The search is simplified by the fact that information about the size and location of available bands are stored at specified locations throughout the bands e.g. every 128th carrier. The efficiency of the search could be even more enhanced if location and size of suitable bands are prestored in the memory M of the MS. In step III, an N+8 carrier band is assigned to the MS. e is a small number or zero. MS downloads the information in step IV and thereafter the band could be freed for other users, step V. To conclude the invention has the following advantages: • The base station uses basically the same signalling method for any operational bandwidth. • The mobiles use basically the same detection method for any operational bandwidth. • The mobile user can use the same detector in OFDM-like systems regardless of the bandwidth used in a specific cell at a specific time • The mobile user can quickly detect changes in spectrum allocations. • The invention gives regulators (national or international) flexibility to allocate different sized spectrum pieces for use with basically the same equipment. • The invention gives operators the technical means to trade spectrum in real time. • Furthermore, when regulatory conditions change the operational bandwidth can be changed quickly with the mobile station still being able to follow what is happening. WE CLAIM 1. Method in a multicarrier wireless telecommunication system interchanging radio communication between base stations (BS) and mobile user stations (MS) of the system, wherein information signals are transmitted over the air interface relating to operation bands (I, II, III) of the radio spectrum used by the system characterized in that the transmitted information signals comprise information signaling about the bandwidth and location in the spectrum of the operational bands as part of the information in one or several sub carriers of the bands. 2. The method as claimed in claim 1 wherein the location information is explicitly signaled or implicitly derivable from synchronization signals. 3. The method as claimed in claims 1 or 2 wherein the signaling is received (R) by the mobile users (MS) which detects the information about available blocks of spectrum and stores it into a memory(M). 4. The method as claimed in claims 1-3 wherein the size information is repeated regularly in subsequent carriers of the operational band (e.g. every 128th sub carrier). 5. The method as claimed in claims 1-4 wherein the information comprises the start and stop frequencies (f1 and f2 respectively) of the band and thereby the bandwidth (f2-f1). 6. The method as claimed in claims 1-4 wherein the information comprises an identifying number representing the size and location of available operation bands. 7. The method as claimed in claim 3 wherein the mobile (MS) repeatedly scans the information signaling for updating its memory (M) about changing conditions relating to the operational bands. 8. The method as claimed in any of the preceding claims wherein the operational bands belong to different operations (A,B) and wherein the subscribers of the different operators may partly or wholly have access to each others operational bands. 9. The method as claimed in any of the preceding claims wherein a mobile station (MS) requests access to a multicarrier band with N carriers for downloading information comprising the following steps • The mobile station searches the radio interface for an N-carrier band by looking for location and size information (II) • The communication system assigns a free band with N+e carriers to the mobile upon the request where e is zero or a small number compared to N(III) • The mobile station downloads the information (IV] 10. A wireless multicarrier telecommunication system including transmitting units (BS) controlled by a traffic controlling center (TCC) and whereby the transmitting units have means to transmit information signals to mobile units (MS) using the system relating to available resources of the system characterized in that the information signals comprise information signaling about the size and location of available bandwidth in a number of operational bands allocated to the system. 11. A base station node (BS) in a multicarrier telecommunication system comprising transmitting means for transmitting information relating to properties of available operational bands (I, II, III) of the spectrum allocated to the system characterized in that the transmitting means include means for transferring information signaling related to size and location of the available operational bands. 12. A mobile station node (MS) in a multicarrier telecommunication system characterized in that it comprises means (R) for receiving information signaling relating to available operational bands in terms of size and location in the radio spectrum and means for searching for channels based on said received information signaling. 13. The mobile station as claimed in claim 9 wherein it further comprises memory means (M) for storing the operational band relating data. The invention relates to bandwidth signalling in a multicarrier wireless telecommunication system. The information is transferred in the band itself (bold carriers) and contains information of the size (f2-f1) and location (f1,f2) of the band (I). The information is repeated in a number of carriers (bold) through out the band.

Full Text

TECHNICAL FIELD
The present invention relates to signalling of available bandwidth especially in multicarrier
wireless telecommunication systems.
BACKGROUND
A tendency of new wireless telecommunication systems is that they often require more
bandwidth than existing systems, as new and more demanding services are likely to be
introduced by the new systems. However, the available spectrum is limited and it is difficult to
identify new spectrum for new communication systems, especially if the new spectrum shall be
identical in all different regions of the world. This calls for a need of flexibility with respect to
spectrum usage in the sense that pieces of radio spectrum of different size and in different
frequency bands should be used with basically the same radio air interface.
For the sake of example, assume that the most demanding applications require that the system
bandwidth needs to be 100 MHz. International standardisation and regulatory bodies will
therefore have to make sure that there will be ample spectrum available so that a number of 100
MHz bands could be offered to the customers. However, it is also likely that certain regions will
have smaller pieces of spectrum available here and there that are smaller than 100 MHz, say a 30
MHz band in one region and a 66 MHz band in another.
One possibility is to design many different air interfaces for a number of bandwidths - say 30,
66 and 100 MHz - and let the base stations and mobile users choose one or several of them
depending on the situation, say a 25 MHz air interface for the 30 MHz band, a 50 MHz interface
for the 66 MHz band and 100 MHz interface for the 100 MHz band. This however leaves some
parts of the spectrum unused: 5 MHz in the 30 MHz band and 16 MHz in the 66 MHz band,
while the 100 MHz band is fully used.

Even if there is a high degree of commonality between different air interfaces, the complexity of
equipment with several air interfaces will be significantly larger than if only one air interface can
be used instead.
Another suggestion for better usage of available frequency spectrum is to let several operators
share spectrum or rent or buy resources from each other.
SUMMARY OF THE INVENTION
The proposals and ideas referred to above suffers from a number of drawbacks. Already
mentioned is that using different air interfaces in several parts of the spectrum causes greater
complexity. Another is that available pieces of spectrum might be too big for certain
applications, which leads to a waste of resources. Still another problem is how to inform the
users of the existence and extent of free spectrum for a certain application at a certain moment in
a certain location area. In other words there is a need for greater flexibility and fast allocation of
resources whenever the users so request.
The solution is presented in the appended claims relating to a method and means for signalling
the availability of spectrum in terms of bandwidth and location.
The invention is advantageously implemented in wireless multicarrier system where the total
maximum bandwidth is made up of a large number of narrowband sub carriers like for example
in Orthogonal Frequency Divisional Multiplexing, OFDM, Interleaved Frequency Divisional
Multiplex, IFDM or similar. In OFDM and IFDM the sub carriers are ideally mutually
orthogonal. Generally, very similar systems can be designed with pulse shapes that make the sub
carriers slightly non-orthogonal but that have other good properties, for example better spectral
properties. This difference does not have a bearing on the invention so when OFDM is
mentioned in the examples below, also these other more general types of systems are applicable.
The only thing that is important is that the system consists of a large number of sub carriers.

With a multicarrier system it is easy to adjust the used system bandwidth by simply switching off
some blocks of sub carriers. However, a problem with this solution is how to inform the mobiles
about the size and location of the spectrum that is currently used by the communication system.
The invention described here solves this problem by including this size and location information
within the sub carriers blocks themselves.
The information about which set of downlink carriers in a block that is available is sent downlink
from the base station on an acquisition channel, a broadcasting channel or some other cell
covering channel. At least one easily detected downlink channel must be transmitted which is
within an operational band known to the mobile user and contains information about where this
operational band starts and stops relative to the location of said downlink channel. It is enough if
the user has a rough idea of where the operational band can be found. This kind of rough
information could have been broadcasted to the user in an earlier cell search.
The format of the information about the size and location of the operational band could vary.
Here are some examples:
• A start and stop frequency or frequency number is given absolutely or relative to the
location of the channel containing this information.
• A start frequency or frequency number is given, absolutely or relatively specified, plus a
number of maximum carriers or a fraction of that number.
• An identifying number where said identifying number identifies an operational
bandwidth from a list of predefined operational bandwidths.
• The information about the location in spectrum could be explicitly signalled or implicitly
derived by synchronisation signals.

• As soon as the mobile is informed of the available resources it may access a suitable
channel representing its needs in the normal way well known to a person skilled in the
art.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The invention, together with further aspects and advantages is exemplified by reference to a
number of embodiments and accompanying drawings wherein:
Fig 1 shows a frequency spectrum exemplifying bands available in a typical situation.
Fig 2 is an overview of the system according to the invention.
Fig 3 is a flow chart showing the steps of the invention in a further embodiment.
DETAILED DESCRIPTION
In Fig 1 a typical spectrum is shown, divided into three blocks or operational bands, I, II and III
of 100 MHz, the maximal system bandwidth in this example. The spectrum is partly shared by
two operators A and B. A has part I and B has part III while part II is shared between the both
operators. It is assumed that, by negotiation between the operators, the border b between A and B
is changed from time to time depending on the demand from the subscribers of A and B
respectively. The sharing distribution could of course be different. Fig 1 is just an example.
N is the number of sub carriers in each part. Lets assume that the 100 MHz band is divided into
4096 sub carriers of about 25 kHz each, (i.e. JV=4096). In theory any number N could be
activated making a large number of air interface bandwidths possible using just one air interface.
This is a basic property of these types of systems. An operator can, at different moments, have
say 1000, 2000 or 4000 carriers to its disposal, varying with the demands and behaviours of the
subscribers.
Assume that the mobile user knows or can guess the approximate location of all N carriers. First
the mobile user must detect the presence of one or more acquisition channel(s) for cell search

purposes. Such channels are designed so that there is a very small probability to mistake them for
other types of signals, or for other types of signals to be mistaken for acquisition signals. In
general the user must scan all possible locations to find this signal in order to unambiguously
find one. Then the mobile knows that this channel lies within the operational bandwidth. After
that, the information in this acquisition channel about the size and location of the actual carrier
set is read.
As an example, the acquisition channel is represented by one or more of the bold marked carriers
of block I in Fig 1. Then the information on the acquisition channel tells the user that the band
starts at fl and stops at f2 and that the bandwidth is f2 — fl.
Alternatively, based on acquisition channel information, the mobile finds another channel that
broadcasts control of the system, and reads the bandwidth information there or part could be read
from an acquisition channel and part from another channel that transmits broadcast control
information.
The system information bold marked carriers are spread out among all possible sub bands of the
operational band. Operator A 's signalling is as follows: in the three bold sub carriers to the left
in block I, information says that the bandwidth is 100 MHz and all sub bands are used i.e. the
whole 100 MHz band, the next three defines a bandwidth of about 70 MHz in block II. Operator
B's signalling is as follows: The single bold sub carrier defines a ca 30 MHz system bandwidth
in block II, and the next three in block III define a full 100 MHz bandwidth.
Included in Fig 1 is a piece of unused spectrum in block II that comprises a few sub carriers that
act as a guard band between the two generally unsynchronised and uncoordinated operators. This
is sometimes beneficial in order to reduce the disturbances between the transmitted signals
belonging to the two neighbouring sub bands
If the operators, in some real time resource exchange or the like, decide that all bandwidth in the
second block II should go to operator A, then operator B simply gracefully finalises or
reallocates traffic from the allotted carriers in this block, signals that the resource in block II is

closed for random access attempts, and stops transmitting in this band, while operator A starts to
signal that the entire 100 MHz block is now available for its subscribers.
Since the terminals periodically read bandwidth information from the downlink control channels,
this process could be made very quickly, in the order of milliseconds. Also, the terminals have or
could have a full bandwidth detector running which makes it trivial to quickly start (de-)
multiplexing data (from) to the newly available sub carriers.
In Fig 1 the bandwidth information is repeated in every forth carrier for illustrative purposes as
mentioned above. In practice, however, the distribution is much more thinly spread out in order
not to waste bandwidth. In a 4096 carrier band the information may be carried on every 128th or
256th carrier occupying less than one percent of the total bandwidth.
In Fig 2 an overview of the system according to the invention is shown. A traffic control centre,
TCC, is connected over suitable interfaces to a number of base station transceivers BS, only one
shown in the figure. The base stations have connections with several mobile stations, MSI and
MS2. The TCC has an over all control of the traffic in the system and one of its tasks is to collect
information about the availability of bandwidth of particular parts of radio spectrum used in the
system. The information is transferred to the base stations and from there transmitted on a
broadcast channel or the like to the users, MS. The TCC is connected to public networks like the
Internet. The TCC may also have connections with other TCCs belonging to other operators and
after negotiations taking over smaller or greater parts of spectrum from each other.
A user, MSI in Fig 2 for example, entering the location area of the system scans the broadcast
channel(s) sent out by the base station for information about available bandwidth and location in
the spectrum according to the invention. MSI, having received the information in receiver R,
stores it into a memory M. After entering the scanning is repeatedly performed for changing
conditions and the memory is updated.
The invention solves the problem of the need for the mobiles to have knowledge of available
bandwidth. The knowledge is collected from a search of the radio environment for the available

resources by detecting system information stored in certain sub carriers in the multicarrier
operational bands.
In Fig 3, a method for downloading information using the invention is illustrated as a number of
steps. In step I, a mobile station, MS, has a need for a multicarrier band with N carriers for the
downloading. The MS searches the radio interface in step II. The search is simplified by the fact
that information about the size and location of available bands are stored at specified locations
throughout the bands e.g. every 128th carrier. The efficiency of the search could be even more
enhanced if location and size of suitable bands are prestored in the memory M of the MS. In step
III, an N+8 carrier band is assigned to the MS. e is a small number or zero. MS downloads the
information in step IV and thereafter the band could be freed for other users, step V.
To conclude the invention has the following advantages:
• The base station uses basically the same signalling method for any operational
bandwidth.
• The mobiles use basically the same detection method for any operational bandwidth.
• The mobile user can use the same detector in OFDM-like systems regardless of the
bandwidth used in a specific cell at a specific time
• The mobile user can quickly detect changes in spectrum allocations.
• The invention gives regulators (national or international) flexibility to allocate different
sized spectrum pieces for use with basically the same equipment.
• The invention gives operators the technical means to trade spectrum in real time.
• Furthermore, when regulatory conditions change the operational bandwidth can be
changed quickly with the mobile station still being able to follow what is happening.

WE CLAIM
1. Method in a multicarrier wireless telecommunication system interchanging radio
communication between base stations (BS) and mobile user stations (MS) of the
system, wherein information signals are transmitted over the air interface relating
to operation bands (I, II, III) of the radio spectrum used by the system
characterized in that the transmitted information signals comprise information
signaling about the bandwidth and location in the spectrum of the operational
bands as part of the information in one or several sub carriers of the bands.
2. The method as claimed in claim 1 wherein the location information is explicitly
signaled or implicitly derivable from synchronization signals.
3. The method as claimed in claims 1 or 2 wherein the signaling is received (R) by
the mobile users (MS) which detects the information about available blocks of
spectrum and stores it into a memory(M).
4. The method as claimed in claims 1-3 wherein the size information is repeated
regularly in subsequent carriers of the operational band (e.g. every 128th sub
carrier).
5. The method as claimed in claims 1-4 wherein the information comprises the start
and stop frequencies (f1 and f2 respectively) of the band and thereby the
bandwidth (f2-f1).
6. The method as claimed in claims 1-4 wherein the information comprises an
identifying number representing the size and location of available operation
bands.

7. The method as claimed in claim 3 wherein the mobile (MS) repeatedly scans the
information signaling for updating its memory (M) about changing conditions
relating to the operational bands.
8. The method as claimed in any of the preceding claims wherein the operational
bands belong to different operations (A,B) and wherein the subscribers of the
different operators may partly or wholly have access to each others operational
bands.
9. The method as claimed in any of the preceding claims wherein a mobile station
(MS) requests access to a multicarrier band with N carriers for downloading
information comprising the following steps

• The mobile station searches the radio interface for an N-carrier band by
looking for location and size information (II)
• The communication system assigns a free band with N+e carriers to the
mobile upon the request where e is zero or a small number compared to
N(III)
• The mobile station downloads the information (IV]

10. A wireless multicarrier telecommunication system including transmitting units
(BS) controlled by a traffic controlling center (TCC) and whereby the transmitting
units have means to transmit information signals to mobile units (MS) using the
system relating to available resources of the system characterized in that the
information signals comprise information signaling about the size and location of
available bandwidth in a number of operational bands allocated to the system.
11. A base station node (BS) in a multicarrier telecommunication system comprising
transmitting means for transmitting information relating to properties of available

operational bands (I, II, III) of the spectrum allocated to the system characterized in
that the transmitting means include means for transferring information signaling
related to size and location of the available operational bands.
12. A mobile station node (MS) in a multicarrier telecommunication system
characterized in that it comprises means (R) for receiving information signaling
relating to available operational bands in terms of size and location in the radio
spectrum and means for searching for channels based on said received
information signaling.
13. The mobile station as claimed in claim 9 wherein it further comprises memory
means (M) for storing the operational band relating data.

The invention relates to bandwidth signalling in a multicarrier wireless telecommunication
system. The information is transferred in the band itself (bold carriers) and contains information
of the size (f2-f1) and location (f1,f2) of the band (I). The information is repeated in a number of
carriers (bold) through out the band.

Documents:

02100-kolnp-2006 abstract.pdf

02100-kolnp-2006 assignment.pdf

02100-kolnp-2006 claims.pdf

02100-kolnp-2006 correspondence others.pdf

02100-kolnp-2006 description (complete).pdf

02100-kolnp-2006 drawings.pdf

02100-kolnp-2006 form-1.pdf

02100-kolnp-2006 form-2.pdf

02100-kolnp-2006 form-3.pdf

02100-kolnp-2006 form-5.pdf

02100-kolnp-2006 international search report.pdf

2100-KOLNP-2006-(18-11-2011)-CORRESPONDENCE.pdf

2100-KOLNP-2006-(24-10-2011)-CORRESPONDENCE.pdf

2100-KOLNP-2006-(24-10-2011)-FORM 3.pdf

2100-KOLNP-2006-ABSTRACT 1.1.pdf

2100-KOLNP-2006-AMANDED CLAIMS.pdf

2100-KOLNP-2006-CANCELLED PAGES.pdf

2100-KOLNP-2006-CORRESPONDENCE 1.1.pdf

2100-KOLNP-2006-Correspondence 1.2.pdf

2100-KOLNP-2006-CORRESPONDENCE OTHERS 1.1.pdf

2100-KOLNP-2006-CORRESPONDENCE.pdf

2100-KOLNP-2006-CORRESPONDENCE1.3.pdf

2100-KOLNP-2006-DESCRIPTION (COMPLETE) 1.1.pdf

2100-KOLNP-2006-DRAWINGS 1.1.pdf

2100-KOLNP-2006-EXAMINATION REPORT.pdf

2100-KOLNP-2006-FORM 1.1.1.pdf

2100-KOLNP-2006-FORM 18.1.pdf

2100-KOLNP-2006-FORM 18.pdf

2100-KOLNP-2006-FORM 2.1.1.pdf

2100-KOLNP-2006-FORM 3.1.1.pdf

2100-KOLNP-2006-FORM 3.1.pdf

2100-KOLNP-2006-FORM 3.pdf

2100-KOLNP-2006-FORM 5.1.1.pdf

2100-KOLNP-2006-FORM 5.pdf

2100-KOLNP-2006-GPA.pdf

2100-KOLNP-2006-GRANTED-ABSTRACT.pdf

2100-KOLNP-2006-GRANTED-CLAIMS.pdf

2100-KOLNP-2006-GRANTED-DESCRIPTION (COMPLETE).pdf

2100-KOLNP-2006-GRANTED-DRAWINGS.pdf

2100-KOLNP-2006-GRANTED-FORM 1.pdf

2100-KOLNP-2006-GRANTED-FORM 2.pdf

2100-KOLNP-2006-GRANTED-SPECIFICATION.pdf

2100-KOLNP-2006-OTHERS 1.1.pdf

2100-KOLNP-2006-OTHERS PCT FORM.pdf

2100-KOLNP-2006-OTHERS.pdf

2100-KOLNP-2006-REPLY TO EXAMINATION REPORT.pdf

2100-KOLNP-2006-REPLY TO EXAMINATION REPORT1.1.pdf

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Patent Number

251757

Indian Patent Application Number

2100/KOLNP/2006

PG Journal Number

14/2012

Publication Date

06-Apr-2012

Grant Date

30-Mar-2012

Date of Filing

26-Jul-2006

Name of Patentee

TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Applicant Address

S-164 83 STOCKHOLM, SWEDEN

Inventors:

#	Inventor's Name	Inventor's Address
1	NYSTROM, PER, JOHAN, ANDERS	KRONOBERGSGATAN 22, S-112 33 STOCKHOLM
2	FRENGER, PAL, KRISTIAN	LYCKSELEVAGEN 33, S-162 67 VALLINGBY

PCT International Classification Number

H04L 27/26,H04Q 7/38

PCT International Application Number

PCT/SE2004/002045

PCT International Filing date

2004-12-29

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	0303607-6	2003-12-30	Sweden