WO2009057039A2 - Method for indicating allocation of resources - Google Patents

Method for indicating allocation of resources Download PDF

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Publication number
WO2009057039A2
WO2009057039A2 PCT/IB2008/054440 IB2008054440W WO2009057039A2 WO 2009057039 A2 WO2009057039 A2 WO 2009057039A2 IB 2008054440 W IB2008054440 W IB 2008054440W WO 2009057039 A2 WO2009057039 A2 WO 2009057039A2
Authority
WO
WIPO (PCT)
Prior art keywords
allocation
groups
resources
resource
subset
Prior art date
Application number
PCT/IB2008/054440
Other languages
French (fr)
Other versions
WO2009057039A3 (en
Inventor
Timothy J. Moulsley
Original Assignee
Koninklijke Philips Electronics N.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2009057039A2 publication Critical patent/WO2009057039A2/en
Publication of WO2009057039A3 publication Critical patent/WO2009057039A3/en

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Classifications

    • 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
    • H04L5/0046—Determination of how many bits are transmitted on different sub-channels
    • 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
    • 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
    • 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
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H04L5/0039—Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another

Definitions

  • the present invention relates a method for indicating allocation of transmission resources in a mobile communication network, and to a primary station impelementing such a method.
  • This invention is, for example, relevant for UMTS systems.
  • the resource is number of resource blocks to be used for transmitting data from a base station to a mobile terminal, and which are identified mainly by their location in the frequency domain.
  • Some current proposals suggest using a bit map to indicate which groups of resource blocks are allocated, where the groups consist of consecutive resource blocks. Additional bits indicate if a subset of groups is to be used instead.
  • This invention is based on the recognition that it is desirable that all the patterns of resource block allocation using the original groups or the subset are distinct. This can be achieved by applying a cyclic shift to the positions of the resource block groups before creating the subset. This leads to more flexibility in resource allocation for a given number of signalling bits.
  • the resource is number of resource blocks to be used for transmitting data from a base station to a mobile terminal, and which are identified mainly by their location in the frequency domain.
  • bit map where each bit corresponds to the allocation (or not) of a given resource block.
  • a bit map For a system with 25 Resource Blocks (RBs), the bit map would indicate the use or otherwise of each group of RBs. In this example the group size is 2. This is identified as Approach 1 of Figure 2, where setting the bit "RBGl" indicates the use of Physical Resource Blocks PRBl and PRBl.
  • An object of the invention is to propose an improved method of signaling resources to a mobile station.
  • a method for indicating an allocation of resources to a secondary station comprising selecting an allocation scheme from at least a first allocation scheme and a second allocation scheme, each allocation scheme being arranged to identify subsets of resources, wherein the resources of the subsets of the first allocation schemes are shifted from resources of the subsets of the second allocation schemes; signaling the allocation scheme to be used in an allocation signal.
  • a primary station comprising signaling means for indicating an allocation of resources to a secondary station, said signaling means comprising means for selecting an allocation scheme from at least a first allocation scheme and a second allocation scheme, each allocation scheme being arranged to identify subsets of resources, wherein the resources of the subsets of the first allocation schemes are shifted from resources of the subsets of the second allocation schemes; and wherein the signaling means are arranged for signaling the allocation scheme to be used in an allocation signal.
  • Fig. 1 is a block diagram of a system in which is implemented the invention.
  • - Fig. 2 is a representation of the resource blocks in accordance with a conventional method.
  • Fig. 3 is a representation of the resource blocks in accordance with an embodiment of the invention.
  • the present invention relates to a system of communication 300 as depicted on Figure 1, comprising a primary station 100, like a base station, and at least one secondary station 200 like a mobile station.
  • the radio system 300 may comprise a plurality of the primary stations 100 and/or a plurality of secondary stations 200.
  • the primary station 100 comprises a transmitter means 110 and a receiving means 120.
  • An output of the transmitter means 110 and an input of the receiving means 120 are coupled to an antenna 130 or an antenna array comprising a plurality of antennas, by a coupling means 140, which may be for example a circulator or a changeover switch.
  • Coupled to the transmitter means 110 and receiving means 120 is a control means 150, which may be for example a processor.
  • the secondary station 200 comprises a transmitter means 210 and a receiving means 220.
  • An output of the transmitter means 210 and an input of the receiving means 220 are coupled to an antenna 230 or an antenna array comprising a plurality of antennas, by a coupling means 240, which may be for example a circulator or a changeover switch. Coupled to the transmitter means 210 and receiving means 220 is a control means 250, which may be for example a processor. Transmission from the primary radio station 100 to the secondary station 200 takes place on a downlink channel 160 and transmission from the secondary radio station 200 to the first radio station 100 takes place on an uplink channel 260.
  • the primary station allocates resources of the uplink channel to the secondary stations.
  • the aim is that none of the groups in the subsets in Approach 2 should exactly match the resource block groups in Approach 1. If this condition is satisfied then, the physical resource patterns which can be allocated will be distinct.
  • the preferred embodiment is a radio communication system using OFDMA in the downlink (such as UMTS LTE).
  • the resource blocks refer to 12 sub-carriers in the frequency domain and a subframe in the time domain.
  • the mobile terminals receive a control channel (PDCCH) which informs them of data being transmitted to them on a data channel (PDSCH).
  • the information in the control channel includes an indication of which resource blocks contain data for that terminal.
  • this information comprises a bit map and some indication of whether the bit map refers to a reduced resolution resource map comprising groups of consecutive resource blocks, or one of a subset of groups of resource blocks, where the boundaries of the blocks in at least one subset are shifted with respect to the boundaries of the groups in the reduced resolution resource map.

Abstract

This invention is based on the recognition that it is desirable that all the patterns ofresource block allocation using the original groups or the subset are distinct. This can be achieved by applying a cyclic shift to the positions of the resource block groups before creating the subset. This leads to more flexibility in resource allocation for a given number of signalling bits. In UMTS LTE downlink signalling for indicating allocation of transmission resources to mobile terminals is under discussion. In this case the resource is number of resource blocks to be used for transmitting data from a base station to a mobile terminal, and which are identified mainly by their location in the frequency domain. Some current proposals suggest using a bit map to indicate which groups of resource blocks are allocated, where the groups consist ofconsecutive resource blocks. Additional bits indicate if a subset of groups is to be used instead.

Description

METHOD FOR INDICATING ALLOCATION OF RESOURCES
FIELD OF THE INVENTION
The present invention relates a method for indicating allocation of transmission resources in a mobile communication network, and to a primary station impelementing such a method. This invention is, for example, relevant for UMTS systems.
BACKGROUND OF THE INVENTION
In UMTS LTE downlink signalling for indicating allocation of transmission resources to mobile terminals is under discussion. In this case the resource is number of resource blocks to be used for transmitting data from a base station to a mobile terminal, and which are identified mainly by their location in the frequency domain. Some current proposals suggest using a bit map to indicate which groups of resource blocks are allocated, where the groups consist of consecutive resource blocks. Additional bits indicate if a subset of groups is to be used instead. This invention is based on the recognition that it is desirable that all the patterns of resource block allocation using the original groups or the subset are distinct. This can be achieved by applying a cyclic shift to the positions of the resource block groups before creating the subset. This leads to more flexibility in resource allocation for a given number of signalling bits. In UMTS LTE downlink signalling for indicating allocation of transmission resources to mobile terminals is under discussion. In this case the resource is number of resource blocks to be used for transmitting data from a base station to a mobile terminal, and which are identified mainly by their location in the frequency domain.
One possibility is to use a bit map, where each bit corresponds to the allocation (or not) of a given resource block. In a conventional method, it is proposed to signal downlink resource allocations using a reduced resolution bit map. As an example, for a system with 25 Resource Blocks (RBs), the bit map would indicate the use or otherwise of each group of RBs. In this example the group size is 2. This is identified as Approach 1 of Figure 2, where setting the bit "RBGl" indicates the use of Physical Resource Blocks PRBl and PRBl.
In Approach 2 of Figure 2, some subsets of the resources are defined and the signalling indicates to which sub-set the bit map should be applied. In this example two subsets are considered. Therefore using subset 1, setting bit "RBl" would indicate the use of PRBl. Using Subset 1, setting bit "RBl" would indicate the use of PRB3. In order to make efficient use of signalling bits, it is desirable that distinct resource allocations are indicated using the different Approachs and subsets.
However, as mentioned for the example shown in Figure 2, with Approach 1, setting the bit "RBGl" indicates the use of the set "PRBl and PRB2". In Approach 2, subset 1, setting bits "RBl" and "RB2" would also indicate the use of "PRBl and PRB2".
SUMMARY OF THE INVENTION An object of the invention is to propose an improved method of signaling resources to a mobile station.
It is another object of the invention to improve the flexibility of the allocation of resources to the secondary station.
According to a first aspect of the invention, a method is proposed for indicating an allocation of resources to a secondary station comprising selecting an allocation scheme from at least a first allocation scheme and a second allocation scheme, each allocation scheme being arranged to identify subsets of resources, wherein the resources of the subsets of the first allocation schemes are shifted from resources of the subsets of the second allocation schemes; signaling the allocation scheme to be used in an allocation signal.
According to a second aspect of the invention, a primary station is proposed, said primary station comprising signaling means for indicating an allocation of resources to a secondary station, said signaling means comprising means for selecting an allocation scheme from at least a first allocation scheme and a second allocation scheme, each allocation scheme being arranged to identify subsets of resources, wherein the resources of the subsets of the first allocation schemes are shifted from resources of the subsets of the second allocation schemes; and wherein the signaling means are arranged for signaling the allocation scheme to be used in an allocation signal.
In accordance with this definition of the invention, it is proposed to shift the allocation sub-sets so as to diversify the possible allocate resources. For instance, in an embodiment of the invention, it is proposed to apply a cyclic shift to the subsets, such that the groups of resources in a subset do not overlap with groups defined in Approach 1.
These and other aspects of the invention will be apparent from and will be elucidated with reference to the embodiments described hereinafter.
BRIEF DESCRIPTION OF THE DRAWING
The present invention will now be described in more detail, by way of example, with reference to the accompanying drawing, wherein:
Fig. 1 is a block diagram of a system in which is implemented the invention. - Fig. 2 is a representation of the resource blocks in accordance with a conventional method.
Fig. 3 is a representation of the resource blocks in accordance with an embodiment of the invention.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a system of communication 300 as depicted on Figure 1, comprising a primary station 100, like a base station, and at least one secondary station 200 like a mobile station.
The radio system 300 may comprise a plurality of the primary stations 100 and/or a plurality of secondary stations 200. The primary station 100 comprises a transmitter means 110 and a receiving means 120. An output of the transmitter means 110 and an input of the receiving means 120 are coupled to an antenna 130 or an antenna array comprising a plurality of antennas, by a coupling means 140, which may be for example a circulator or a changeover switch. Coupled to the transmitter means 110 and receiving means 120 is a control means 150, which may be for example a processor. The secondary station 200 comprises a transmitter means 210 and a receiving means 220. An output of the transmitter means 210 and an input of the receiving means 220 are coupled to an antenna 230 or an antenna array comprising a plurality of antennas, by a coupling means 240, which may be for example a circulator or a changeover switch. Coupled to the transmitter means 210 and receiving means 220 is a control means 250, which may be for example a processor. Transmission from the primary radio station 100 to the secondary station 200 takes place on a downlink channel 160 and transmission from the secondary radio station 200 to the first radio station 100 takes place on an uplink channel 260.
The primary station allocates resources of the uplink channel to the secondary stations. In accordance with an embodiment of the invention, the aim is that none of the groups in the subsets in Approach 2 should exactly match the resource block groups in Approach 1. If this condition is satisfied then, the physical resource patterns which can be allocated will be distinct.
This is illustrated for instance on figure 3 where none of the groups in the subsets of Approach 2 matches one group of Approach 1. For instance, if PRBl corresponds to the set of resources consisting of RBl and RB2, there is no subset of Approach 2 consisting of RBl and RB2.
The preferred embodiment is a radio communication system using OFDMA in the downlink (such as UMTS LTE). Here the resource blocks refer to 12 sub-carriers in the frequency domain and a subframe in the time domain. The mobile terminals receive a control channel (PDCCH) which informs them of data being transmitted to them on a data channel (PDSCH). The information in the control channel includes an indication of which resource blocks contain data for that terminal. According to the invention this information comprises a bit map and some indication of whether the bit map refers to a reduced resolution resource map comprising groups of consecutive resource blocks, or one of a subset of groups of resource blocks, where the boundaries of the blocks in at least one subset are shifted with respect to the boundaries of the groups in the reduced resolution resource map.
In the present specification and claims the word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. Further, the word "comprising" does not exclude the presence of other elements or steps than those listed.
The inclusion of reference signs in parentheses in the claims is intended to aid understanding and is not intended to be limiting. From reading the present disclosure, other modifications will be apparent to persons skilled in the art. Such modifications may involve other features which are already known in the art of radio communication

Claims

1. A method for indicating an allocation of resources to a secondary station comprising selecting an allocation scheme from at least a first allocation scheme and a second allocation scheme, each allocation scheme being arranged to identify subsets of resources, wherein the resources of the subsets of the first allocation schemes are shifted from resources of the subsets of the second allocation schemes; signaling the allocation scheme to be used in an allocation signal.
2. The method of claim 1, wherein the subsets of the first allocation scheme are all different from the subsets of the second allocation scheme.
3. The method of claim 2 where the subsets are all of equal size.
4. The method of claim 3 where the subsets of the second allocation scheme are shifted by an amount not equal to size of a subset.
5. A primary station comprising signaling means for indicating an allocation of resources to a secondary station, said signaling means comprising means for selecting an allocation scheme from at least a first allocation scheme and a second allocation scheme, each allocation scheme being arranged to identify subsets of resources, wherein the resources of the subsets of the first allocation schemes are shifted from resources of the subsets of the second allocation schemes; and wherein the signaling means are arranged for signaling the allocation scheme to be used in an allocation signal.
PCT/IB2008/054440 2007-10-30 2008-10-28 Method for indicating allocation of resources WO2009057039A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07301516 2007-10-30
EP07301516.6 2007-10-30

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Publication Number Publication Date
WO2009057039A2 true WO2009057039A2 (en) 2009-05-07
WO2009057039A3 WO2009057039A3 (en) 2009-07-23

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010145401A1 (en) * 2009-10-13 2010-12-23 中兴通讯股份有限公司 Group management method and device for group resource assignment
CN102223719A (en) * 2010-04-16 2011-10-19 华为技术有限公司 Resource distribution indication method, base station equipment, user equipment (UE)
US20150009911A1 (en) * 2013-07-05 2015-01-08 Ntt Docomo, Inc. Mobile Communication Method, Wireless Base Station and Mobile Station
TWI499344B (en) * 2012-06-27 2015-09-01 Alcatel Lucent A method and apparatus for device-to-device communication
WO2016191983A1 (en) * 2015-05-29 2016-12-08 华为技术有限公司 Method and device for resource mapping

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
MITSUBISHI ELECTRIC ET AL: "Resource block mapping for EUTRA downlink distributed transmissions" 3GPP DRAFT; R1-072064, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, no. Kobe, Japan; 20070507, 2 May 2007 (2007-05-02), XP050105818 *
NOKIA ET AL: "Signalling of PRB allocations for LTE downlink" 3GPP DRAFT; R1-072303, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, no. Kobe, Japan; 20070507, 2 May 2007 (2007-05-02), XP050106033 *
PHILIPS: "Resource-Block Mapping of Distributed Transmissions in E-UTRA Downlink" 3GPP DRAFT; R1-071399, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, no. St. Julian; 20070326, 20 March 2007 (2007-03-20), XP050105342 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010145401A1 (en) * 2009-10-13 2010-12-23 中兴通讯股份有限公司 Group management method and device for group resource assignment
CN102223719A (en) * 2010-04-16 2011-10-19 华为技术有限公司 Resource distribution indication method, base station equipment, user equipment (UE)
CN102223719B (en) * 2010-04-16 2014-01-08 华为技术有限公司 Resource distribution indication method, base station equipment, user equipment (UE)
TWI499344B (en) * 2012-06-27 2015-09-01 Alcatel Lucent A method and apparatus for device-to-device communication
US20150009911A1 (en) * 2013-07-05 2015-01-08 Ntt Docomo, Inc. Mobile Communication Method, Wireless Base Station and Mobile Station
US9520976B2 (en) * 2013-07-05 2016-12-13 Ntt Docomo, Inc. Mobile communication method, wireless base station and mobile station
WO2016191983A1 (en) * 2015-05-29 2016-12-08 华为技术有限公司 Method and device for resource mapping
US10608796B2 (en) 2015-05-29 2020-03-31 Huawei Technologies Co., Ltd. Resource mapping for a user equipment in a communication system
US11171753B2 (en) 2015-05-29 2021-11-09 Huawei Technologies Co., Ltd. Resource mapping for a user equipment in a communication system

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