US20070022441A1 - Bandwidth signalling - Google Patents

Bandwidth signalling Download PDF

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Publication number
US20070022441A1
US20070022441A1 US10/596,859 US59685904A US2007022441A1 US 20070022441 A1 US20070022441 A1 US 20070022441A1 US 59685904 A US59685904 A US 59685904A US 2007022441 A1 US2007022441 A1 US 2007022441A1
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United States
Prior art keywords
information
location
band
operational
bands
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/596,859
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English (en)
Inventor
Per Nystrom
Pal Frenger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) reassignment TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FRENGER, PAL KRISTIAN, NYSTROM, PER JOHAN ANDERS
Publication of US20070022441A1 publication Critical patent/US20070022441A1/en
Priority to US14/556,871 priority Critical patent/US20150155982A1/en
Priority to US15/196,191 priority patent/US20160308656A1/en
Priority to US17/213,674 priority patent/US11664953B2/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to signalling of available bandwidth especially in multicarrier wireless telecommunication systems.
  • 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.
  • 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.
  • OFDM and IFDM the sub carriers are ideally mutually orthogonal.
  • 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.
  • 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:
  • 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.
  • 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.
  • the sharing distribution could of course be different.
  • FIG. 1 is just an example.
  • 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.
  • the mobile user knows or can guess the approximate location of all N carriers.
  • the mobile user must detect the presence of one or more acquisition channel(s) for cell search purposes.
  • acquisition channel(s) 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.
  • 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.
  • 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 f 1 and stops at f 2 and that the bandwidth is f 2 -f 1 .
  • 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.
  • 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.
  • FIG. 1 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
  • 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.
  • the terminals 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.
  • 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 128 th or 256 th carrier occupying less than one percent of the total bandwidth.
  • a traffic control centre 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, MS 1 and MS 2 .
  • 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, MS 1 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.
  • MS 1 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.
US10/596,859 2003-12-30 2004-12-29 Bandwidth signalling Abandoned US20070022441A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US14/556,871 US20150155982A1 (en) 2003-12-30 2014-12-01 Bandwidth signalling
US15/196,191 US20160308656A1 (en) 2003-12-30 2016-06-29 Bandwidth signalling
US17/213,674 US11664953B2 (en) 2003-12-30 2021-03-26 Bandwidth signalling

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0303607A SE0303607D0 (sv) 2003-12-30 2003-12-30 Brandwidth signalling
SE0303607-6 2003-12-30
PCT/SE2004/002045 WO2005064875A1 (en) 2003-12-30 2004-12-29 Bandwidth signalling

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2004/002045 A-371-Of-International WO2005064875A1 (en) 2003-12-30 2004-12-29 Bandwidth signalling

Related Child Applications (1)

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US14/556,871 Continuation US20150155982A1 (en) 2003-12-30 2014-12-01 Bandwidth signalling

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US20070022441A1 true US20070022441A1 (en) 2007-01-25

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US10/596,859 Abandoned US20070022441A1 (en) 2003-12-30 2004-12-29 Bandwidth signalling
US14/556,871 Abandoned US20150155982A1 (en) 2003-12-30 2014-12-01 Bandwidth signalling
US15/196,191 Abandoned US20160308656A1 (en) 2003-12-30 2016-06-29 Bandwidth signalling
US17/213,674 Active US11664953B2 (en) 2003-12-30 2021-03-26 Bandwidth signalling

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US14/556,871 Abandoned US20150155982A1 (en) 2003-12-30 2014-12-01 Bandwidth signalling
US15/196,191 Abandoned US20160308656A1 (en) 2003-12-30 2016-06-29 Bandwidth signalling
US17/213,674 Active US11664953B2 (en) 2003-12-30 2021-03-26 Bandwidth signalling

Country Status (9)

Country Link
US (4) US20070022441A1 (de)
EP (1) EP1702446B1 (de)
JP (1) JP4800971B2 (de)
CN (1) CN1902871B (de)
AT (1) ATE378762T1 (de)
DE (1) DE602004010184D1 (de)
HK (1) HK1102985A1 (de)
SE (1) SE0303607D0 (de)
WO (1) WO2005064875A1 (de)

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US20070147226A1 (en) * 2005-10-27 2007-06-28 Aamod Khandekar Method and apparatus for achieving flexible bandwidth using variable guard bands
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US20080310357A1 (en) * 2005-10-27 2008-12-18 Qualcomm Incorporated Method and Apparatus for Processing Tuneaway in Open State in Wireless Communication System
US20090135768A1 (en) * 2005-10-27 2009-05-28 Qualcomm Incorporated Method and apparatus for processing simultaneous assignment in wireless communication systems
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US9137075B2 (en) * 2007-02-23 2015-09-15 Telefonaktiebolaget Lm Ericsson (Publ) Subcarrier spacing identification
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EP1702446B1 (de) 2007-11-14
CN1902871A (zh) 2007-01-24
US20160308656A1 (en) 2016-10-20
SE0303607D0 (sv) 2003-12-30
DE602004010184D1 (de) 2007-12-27
JP4800971B2 (ja) 2011-10-26
US20210218541A1 (en) 2021-07-15
US11664953B2 (en) 2023-05-30
HK1102985A1 (en) 2007-12-07
CN1902871B (zh) 2012-08-15
EP1702446A1 (de) 2006-09-20
JP2007517460A (ja) 2007-06-28
ATE378762T1 (de) 2007-11-15
US20150155982A1 (en) 2015-06-04
WO2005064875A1 (en) 2005-07-14

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