WO2008066284A1 - Procédé d'informations d'allocation de ressources d'émission/réception dans un système de communication - Google Patents

Procédé d'informations d'allocation de ressources d'émission/réception dans un système de communication Download PDF

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Publication number
WO2008066284A1
WO2008066284A1 PCT/KR2007/005915 KR2007005915W WO2008066284A1 WO 2008066284 A1 WO2008066284 A1 WO 2008066284A1 KR 2007005915 W KR2007005915 W KR 2007005915W WO 2008066284 A1 WO2008066284 A1 WO 2008066284A1
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WIPO (PCT)
Prior art keywords
field
resource allocation
allocation information
information
resource
Prior art date
Application number
PCT/KR2007/005915
Other languages
English (en)
Inventor
Young-Ho Jung
Yung-Soo Kim
Cheol-Woo You
Original Assignee
Samsung Electronics Co., Ltd.
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 Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Publication of WO2008066284A1 publication Critical patent/WO2008066284A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • 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
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • 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 generally to a communication system, and in particular, to a method for transmitting/receiving resource allocation information in a communication system.
  • next generation communication system is evolving into the advanced system for providing Mobile Stations (MSs) with services capable of high-speed, high-capacity data transmission/reception.
  • MSs Mobile Stations
  • IEEE 802.16e communication system and an IEEE 802.20 communication system are typical examples of the next generation communication system.
  • FIG. 1 schematically illustrates an operation of transmitting resource allocation information in a Base Station (BS) of a general IEEE 802.16e communication system.
  • BS Base Station
  • a frame for the IEEE 802.16e communication system includes a Downlink (DL) frame 100 and an Uplink (UL) frame 150.
  • the downlink frame 100 includes a Frame Control Header (FCH) field 111, Generic Medium Access Control (MAC) Header (GMH) fields 113-1 and 113-2, a Downlink MAP (DL-MAP) field 115, an Uplink MAP (UL-MAP) field 117, Cyclic Redundancy Check (CRC) fields 119-1 and 119-2, and downlink burst fields, i.e.
  • the DL- MAP field 115 includes multiple DL-MAP Information Elements (IEs) 123-1, 123-2, 123-3 and 123-4.
  • the UL-MAP field 117 includes multiple UL-MAP IEs 125-1, 125-2, 125-3 and 125-4.
  • the uplink frame 150 includes a Channel Quality Information Channel (CQICH) field 151, an Acknowledgement (ACK) Channel (ACKCH) field 153, a Code Division Multiple Access (CDMA) ranging field 155, and uplink burst fields, i.e. an uplink burst_#l field 157-1, an uplink burst_#2 field 157-2 and an uplink burst_#3 field 157-3.
  • CQICH Channel Quality Information Channel
  • ACKCH Acknowledgement
  • CDMA Code Division Multiple Access
  • Basic information for subchannel, ranging, modulation scheme, etc. is transmitted over the FCH field 111.
  • a DL-MAP message is transmitted over the DL-MAP field 115, and the DL-MAP message includes the DL-MAP IEs.
  • the DL-MAP IE 123-1 includes resource allocation information for the downlink burst_#l field 121-1;
  • the DL-MAP IE 123-2 includes resource allocation information for the downlink burst_#2 field 121-2;
  • the DL-MAP IE 123-3 includes resource allocation information for the downlink burst_#3 field 121-3;
  • the DL-MAP IE 123-4 includes resource allocation information for the downlink burst_#4 field 121-4.
  • the downlink burst_#l field 121-1 through the downlink burst_#4 field 121-4 are used for transmitting corresponding downlink data bursts thereover.
  • a UL-MAP message is transmitted over the UL-MAP field 117, and the UL-MAP message includes multiple UL-MAP IEs.
  • UL-MAP IE 125-1 includes resource allocation information for the uplink burst_#l field 157- 1; the UL-MAP IE 125-2 includes resource allocation information for the uplink burst_#2 field 157-2; and the UL-MAP IE 125-3 includes resource allocation information for the uplink burst_#3 field 157-3.
  • the uplink burst_#l field 157-1 through the uplink burst_#3 field 157-3 are used for transmitting corresponding uplink data bursts thereover.
  • a CQICH signal is transmitted over the CQICH field 151, and an ACKCH signal is transmitted over the ACKCH field 153.
  • a ranging code is transmitted over the CDMA ranging field 155.
  • the downlink frame 100 supports the distributed-type resource configuration and the localized-type resource configuration. That is, the FCH field 111, the GMH fields 113-1 and 113-2, the DL-MAP field 115, the UL- MAP field 117, the CRC fields 119-1 and 119-2, the downlink burst_#l field 121- 1, and the downlink burst_#2 field 121-2 use distributed-type resources, while the downlink burst_#3 field 121-3 and the downlink burst_#4 field 121-4 use localized-type resources.
  • the BS of the IEEE 802.16e communication system transmits resource allocation information for the downlink bursts over the DL-MAP field 115, and transmits resource allocation information for the uplink bursts over the UL-MAP field 117.
  • positions of the DL-MAP field 115 and the UL-MAP field 117, over which the resource allocation information is transmitted are set as a start point of the downlink frame 100. Therefore, a period, for which the resource allocation information is transmitted, increases in units of frames, causing an increase in the delay for transmitting the resource allocation information in the IEEE 802.16e communication system using Hybrid Automatic Repeat reQuest (HARQ).
  • HARQ Hybrid Automatic Repeat reQuest
  • the BS can no longer transmit the resource allocation information.
  • a modulation and coding scheme should be applied according to the channel state of the MS having the worst channel state among the MSs to which the distributed-type resources are allocated.
  • the modulation and coding scheme is applied according to the channel state of the MS having the worst channel state in this way, the transmission efficiency reduces, and further, power control for the distributed-type resources is impossible because the IEEE 802.16e communication system multiplexes the distributed-type resources using Time Division Multiplexing (TDM).
  • TDM Time Division Multiplexing
  • FIG. 2 schematically illustrates an operation of transmitting resource allocation information in a BS of a general IEEE 802.20 communication system.
  • a Forward Link Physical (FL PHY) layer frame of the IEEE 802.20 communication system includes a Forward Shared Signaling Channel (F-SSCH) field 200, and Forward Data Channel (F-DCH) fields, i.e. F- DCH #1 220-1, F-DCH #2 220-2 and F-DCH #3 220-3.
  • F-SSCH Forward Shared Signaling Channel
  • F-DCH Forward Data Channel
  • the F-SSCH field 200 includes Forward Link Assignment Blocks (FLABs) 200-1, 200-2 and 200-3; CRCs 202-1, 202-2 and 202-3 associated with the FLABs 200-1, 200-2 and 200-3, respectively; Reverse Link Assignment Blocks (RLABs) 210-1 and 210-2; and CRCs 212-1 and 212-2 associated with the RLABs 210-1 and 210-2, respectively.
  • the FLABs 200-1, 200-2 and 200-3 include resource allocation information for the F-DCH #1 220-1, the F-DCH #2 220-2 and the F-DCH #3 220-3, respectively.
  • the RLABs 210-1 and 210-2 though not separately shown in FIG. 2, include resource allocation information for Reverse Data Channels (R-DCHs) included in a Reverse Link Physical (RL PHY) layer frame of the IEEE 802.20 communication system, respectively.
  • R-DCHs Reverse Data Channels
  • RL PHY Reverse Link Physical
  • the FL PHY layer frame of the IEEE 802.20 communication system occupies an 8-Orthogonal Frequency Division Multiplexing (OFDM) symbol interval, i.e., occupies a 0.91-ms interval, in the time domain, and occupies a 512-tone interval, i.e., a 5-MHz interval, in the frequency domain.
  • OFDM Frequency Division Multiplexing
  • F-DCH signals are transmitted over the F-DCH #1 220-1, the F-DCH #2 220-2 and the F-DCH #3 220-3.
  • the FL PHY layer frame described in FIG. 2 supports the localized-type resource configuration or the distributed-type resource configuration.
  • the BS of the IEEE 802.20 communication system transmits resource allocation information for the localized-type resources using the localized-type resources. That is, the BS of the IEEE 802.20 communication system transmits resource allocation information for the F-DCH #1 220-1, the F-DCH #2 220-2 and the F-DCH #3 220-3, which are localized-type resources, over the FLABs 202-1, 202-2 and 202-3, which are also localized-type resources, respectively.
  • the IEEE 802.20 communication system fixedly uses the modulation and coding scheme applied to the FLABs 202-1, 202-2 and 202-3, and the RLABs 210-1 and 210-2 included in the F-SSCH field 200, regardless of the channel state of the MS, thereby causing a reduction in the transmission efficiency.
  • An aspect of the present invention is to address at least the problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present invention is to provide a method for transmitting/receiving resource allocation information in a communication system.
  • Another aspect of the present invention is to provide a method for generating a frame in a communication system.
  • a method for transmitting resource allocation information by a Base Station (BS) in a communication system includes transmitting resource allocation information for resources allocated in units of Transmit Time Intervals (TTIs), on a TTI-by-TTI basis; wherein the resources are in a form of a localized-type resource block.
  • TTIs Transmit Time Intervals
  • a method for receiving resource allocation information by a Mobile Station (MS) in a communication system includes receiving resource allocation information for resources allocated in units of Transmit Time Intervals (TTIs), on a TTI-by-TTI basis; wherein the resources are in a form of a localized-type resource block.
  • TTIs Transmit Time Intervals
  • a method for transmitting a frame by a Base Station (BS) in a communication system includes generating a frame including a first resource allocation information field, at least one Resource Allocation Header (RAH) field, at least one second resource allocation information field, and at least one data resource field; and transmitting the frame.
  • the first resource allocation information field includes size information of the RAH field and information on a Modulation and Coding Scheme (MCS) level applied to the RAH field.
  • MCS Modulation and Coding Scheme
  • the RAH field mandatorily includes an MCS level applied to the second resource allocation information field, and length and position information, and optionally includes minimum required channel state information for decoding the corresponding second resource allocation information field.
  • the second resource allocation information field includes at least one of a user identifier (ID), a resource ID allocated to each user, MCS level information applied to a corresponding resource field, a multi-antenna support mode, operation mode-related information such as information on a Hybrid Automatic Repeat reQuest (HARQ) type applied to a data resource field, if any, and supplementary information based on other resource allocation information transmission scheme, and a resource allocation message for a corresponding TTI is encoded in one channel encoding block before being transmitted.
  • ID user identifier
  • MCS level information applied to a corresponding resource field
  • HARQ Hybrid Automatic Repeat reQuest
  • a method for receiving a frame by a Mobile Station (MS) in a communication system includes receiving a frame including a first downlink physical-shared broadcasting channel indicative of a first resource allocation information field, at least one Resource Allocation Header (RAH) field, at least one second resource allocation information field, and at least one data resource field.
  • the first resource allocation information field includes size information of the RAH field, and information on a Modulation and Coding Scheme (MCS) level applied to the RAH field.
  • MCS Modulation and Coding Scheme
  • the RAH field mandatorily includes an MCS level applied to the second resource allocation information field, and length and position information, and optionally includes minimum required channel state information for decoding the corresponding second resource allocation information field.
  • the second resource allocation information field includes at least one of a user identifier (ID), a resource ID allocated to each user, MCS level information applied to a corresponding resource field, a multi-antenna support mode, operation mode-related information such as information on a Hybrid Automatic Repeat reQuest (HARQ) type applied to a data resource field, if any, and supplementary information based on other resource allocation information transmission scheme, and a resource allocation message for a corresponding TTI is encoded in one channel encoding block before being transmitted.
  • ID user identifier
  • MCS level information applied to a corresponding resource field
  • HARQ Hybrid Automatic Repeat reQuest
  • FIG. 1 schematically illustrates an operation of transmitting resource allocation information in a Base Station (BS) of a general IEEE 802.16e communication system;
  • BS Base Station
  • FIG. 2 schematically illustrates an operation of transmitting resource allocation information in a BS of a general IEEE 802.20 communication system
  • FIG. 3 illustrates a frame structure for a communication system according to an embodiment of the present invention
  • FIG. 4 schematically illustrates a scheme for multiplexing resources included in a RAH field in a localized-type resource configuration according to an embodiment of the present invention
  • FIG. 5 schematically illustrates an operation of a BS according to an embodiment of the present invention.
  • FIG. 6 schematically illustrates an operation of an MS according to an embodiment of the present invention.
  • the present invention provides a method for transmitting/receiving resource allocation information in a communication system. Further, the present invention provides a method for generating a frame in a communication system.
  • the frame is generated by a Base Station (BS) of the communication system.
  • BS Base Station
  • An Institute of Electrical and Electronics Engineers (IEEE) 802.16e communication system and an IEEE 802.20 communication system are typical examples of the next generation communication system, and an operation of transmitting/receiving resource allocation information in the IEEE 802.16e communication system and the IEEE 802.20 communication system has been described with reference to FIGs. 1 and 2.
  • the BS of the IEEE 802.16e communication system transmits resource allocation information
  • positions of the fields, or Downlink MAP (DL-MAP) field and Uplink MAP (UL-MAP) field, over which the resource allocation information is transmitted, are allocated as a start point of the downlink frame.
  • DL-MAP Downlink MAP
  • UL-MAP Uplink MAP
  • the IEEE 802.16e communication system using Hybrid Automatic Repeat reQuest increases in the delay for transmitting the resource allocation information, and uses only the distributed-type resources. Therefore, when there is no distributed-type resource available in the IEEE 802.16e communication system, the BS can no longer transmit the resource allocation information.
  • a modulation and coding scheme should be applied according to the channel state of the MS having the worst channel state among the MSs to which the distributed-type resources are allocated.
  • TDM Time Division Multiplexing
  • the IEEE 802.20 communication system In the case where the BS of the IEEE 802.20 communication system transmits information on localized-type resources, if a channel gain of the frequency field, or Forward Shared Signaling Channel (F-SSCH) field, over which the resource allocation information for the localized-type resources is transmitted, is low, reliability of the localized-type resource allocation information considerably reduces.
  • the IEEE 802.20 communication system fixedly uses the modulation and coding scheme applied to the Forward Link Assignment Blocks (FLABs) and the Reverse Link Assignment Blocks (RLABs) included in the F-SSCH field, regardless of the channel state of the MS, thereby causing a reduction in the transmission efficiency.
  • the present invention provides a method for transmitting/receiving resource allocation information, so as to prevent unnecessary decoding of the resource allocation information while increasing the transmission efficiency.
  • FIG. 3 a description will now be made of a frame structure for a communication system according to an embodiment of the present invention.
  • FIG. 3 illustrates a frame structure for a communication system according to an embodiment of the present invention.
  • the frame structure shown in FIG. 3 is a structure of a frame generated by a BS of the communication system.
  • an operation of generating by the BS a frame having the frame structure is not separately shown in FIG. 3, the operation in which the BS of the communication system generates a frame according to the determined frame structure is well known in the art.
  • the frame includes a preamble field 311, a first resource allocation information field 313, multiple Resource Allocation Header (RAH) fields 315-1, 315-2, 315-3, 315-4 and 315-5, each of which exists for each resource transmission unit, or Transmit Time Interval (TTI), multiple second resource allocation information fields 317-1, 317-2, 317-3, 317-4 and 317-5, each of which is transmitted for each TTI, A-type data resource fields 319-1 and 319-3, and B-type data resource fields 319-2, 319-4 and 319-5.
  • RH Resource Allocation Header
  • a fixedly preset Modulation and Coding Scheme (MCS) level is applied to the first resource allocation information field 313.
  • MCS Modulation and Coding Scheme
  • a size of the first resource allocation information field 313 is fixed, and the logical resources included in the first resource allocation information field 313 are also fixed.
  • the first resource allocation information field 313 uses the distributed- rype resources to increase its transmission reliability. Size information and position information of the RAH field, information on the MCS level applied to the RAH field, resource type information for each TTI of the frame, etc. are transmitted over the first resource allocation information field 313.
  • a fixedly preset MCS level is applied to the RAH fields 315-1, 315-2, 315-3, 315-4 and 315-5, sizes of the RAH fields 315-1, 315-2, 315-3, 315-4 and 315-5 are fixed, and the logical resources included in the RAH fields 315-1, 315- 2, 315-3, 315-4 and 315-5 are also fixed.
  • the RAH fields 315-1, 315-2, 315-3, 315-4 and 315-5 use the distributed-type resources regardless of the resource type of the data fields.
  • the RAH fields 315-1, 315-2, 315-3, 315-4 and 315-5 basically include MCS level information applied to the second resource allocation information fields 317-1, 317-2, 317-3, 317-4 and 317-5 connected thereto, and length and position information, and can optionally further include the minimum required channel state information of the MS capable of decoding the second resource allocation information of the corresponding TTI.
  • Resource allocation information for data resource fields 319-1, 319-2, 319-3, 319-4 and 319-5 connected to the second resource allocation information fields 317-1, 317-2, 317-3, 317-4 and 317-5 is transmitted over the second resource allocation information fields 317-1, 317-2, 317-3, 317-4 and 317-5.
  • resource allocation information for the A-type data resource field 319-1 is transmitted over the second resource allocation information field 317-1; resource allocation information for the B-type data resource field 319-2 is transmitted over the second resource allocation information field 317-2; resource allocation information for the A-type data resource field 319-3 is transmitted over the second resource allocation information field 317-3; resource allocation information for the B-type data resource field 319-4 is transmitted over the second resource allocation information field 317-4; and resource allocation information for the B-type data resource field 319-5 is transmitted over the second resource allocation information field 317-5.
  • resource allocation information for the data transmitted over the data resource fields 319-1, 319-2, 319-3, 319-4 and 319-5 is transmitted over the second resource allocation information fields 317-1, 317-2, 317-3, 317-4 and 317-5.
  • the resource allocation information includes user Identifiers (IDs) allocated to the data transmission resources of the data resource fields 319-1, 319- 2, 319-3, 319-4 and 319-5, resource IDs allocated to the users, MCS level information applied to the corresponding resource field, a multi-antenna support mode, operation mode-related information such as information on an HARQ type applied to the data resource field, if any, and supplementary information based on other resource allocation information transmission scheme.
  • IDs user Identifiers
  • a second resource allocation information message encoded in one channel encoding block is mapped to each of the second resource allocation information fields 317-1, 317-2, 317-3, 317-4 and 317-5, and an MCS level of second resource allocation information for each TTI can be different.
  • the A-type data resource fields 319-1 and 319-3, and the B-type data resource fields 319-2, 319-4 and 319-5 each are allocated on a TTI-by-TTI basis, and are subject to change according to the channel conditions and user conditions.
  • the TTI indicates a scheduling period of the communication system.
  • the communication system can transmit resource allocation information on a TTI-by-TTI basis, the delay is no considerable, even though HARQ is used for transmission of the resource allocation information.
  • the BS transmits the resource allocation information by adjusting an MCS level according to the user having the worst channel among the users allocated to each TTI, thereby contributing to an increase in the transmission efficiency.
  • the MSs have difficulty in determining over which TTI they should receive information on the resources allocated thereto, so they decode the entire resource allocation information.
  • the MCS level determined considering the MS having the worst channel state is applied so that even the MS having the worst channel state among the MSs provided with the resources allocated in the corresponding TTI can receive the resource allocation information.
  • the present invention provides the following scheme.
  • the BS additionally transmits a Signal-to-Noise Ratio (SNR) of the MS having the worst channel state among the MSs scheduled in the corresponding TTI, over the RAH field. Then the MSs decode the RAH field and continuously perform decoding only when the SNR included in the RAH field is greater than or equal to their own SNR.
  • SNR Signal-to-Noise Ratio
  • the MS For an initially scheduled MS, the MS is first allocated the resources to which an MCS level for the MS having the worst channel state is applied, and then is allocated the resources corresponding to another TTI, i.e. A-type data resource field or B-type data resource field, through in-band signaling.
  • TTI i.e. A-type data resource field or B-type data resource field
  • FIG. 4 schematically illustrates a scheme for multiplexing resources included in a RAH field in a localized-type resource configuration according to an embodiment of the present invention.
  • a localized-type resource block 400 occupies an interval of a plurality of, for example, 8 Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain, and occupies an interval of a plurality of, for example, 16 subcarriers in the frequency domain. That is, in FIG. 4, the time-domain interval occupied by the localized-type resource block 400 is one TTI interval.
  • a two-dimensional resource field occupied by one OFDM symbol and one subcarrier is referred to as a 'unit resource field' .
  • the localized-type resource block 400 includes multiple pilot fields, and pilot signals are transmitted over the pilot fields.
  • a size of one pilot field is equal to a size of one unit resource field.
  • Positions and the number of the pilot fields can adaptively vary according to the conditions of the communication system.
  • the localized-type resource block 400 includes multiple unit resource fields included in the RAH field, and the RAH field includes multiple unit resource fields.
  • FIG. 5 schematically illustrates an operation of a BS according to an embodiment of the present invention.
  • the BS generates first resource allocation information based on resource configuration information of a corresponding frame and transmits the generated first resource allocation information.
  • the BS allocates resources to users on a TTI-by-TTI basis, and determines coding rate and length information of a second resource allocation message.
  • the BS generates a RAH, and transmits the generated RAH.
  • the BS transmits the second resource allocation message.
  • the BS transmits data.
  • FIG. 6 schematically illustrates an operation of an MS according to an embodiment of the present invention.
  • step 605 the MS receives first resource allocation information, and acquires information necessary for RAH reception.
  • step 610 the MS decodes a RAH of the corresponding TTI to determine whether it can decode second resource allocation information in the corresponding TTI. If it is determined in step 615 that reception of the second resource allocation information in the corresponding TTI is impossible, the MS proceeds to step 620 where it waits for the next TTI, and then returns to step 610. However, if the reception of the second resource allocation information in the corresponding TTI is possible, the MS proceeds to step 625 where it decodes the second resource allocation information. Thereafter, if it is determined in step 630 that data is allocated to the MS corresponding to the second resource allocation information, the MS receives the corresponding data in step 635. Otherwise, the MS proceeds to step 620.
  • the present invention can transmit resource allocation information on a TTI-by-TTI basis, thereby reducing the delay even for HARQ-based transmission of the resource allocation information.
  • the invention at it transmits the resource allocation information on a TTI-by-TTI basis, can acquire frequency diversity gain. Further, the invention transmits resource allocation information by adjusting an appropriate MCS level necessary for the resource allocation information, thereby increasing the transmission efficiency.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

L'invention concerne un procédé d'information d'allocation de ressources d'émission/réception dans un système de communication. Une station de base émet des informations d'allocation de ressources relatives à des ressources allouées dans des unités d'intervalle de temps d'émission (TTI), TTI par TTI. Une station mobile reçoit des informations d'allocation de ressources relatives à des ressources allouées dans des unités de TTI, TTI par TTI. Ces ressources sont des ressources de type localisées ou de type réparties.
PCT/KR2007/005915 2006-11-29 2007-11-22 Procédé d'informations d'allocation de ressources d'émission/réception dans un système de communication WO2008066284A1 (fr)

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KR10-2006-0118886 2006-11-29
KR1020060118886A KR20080048659A (ko) 2006-11-29 2006-11-29 통신 시스템에서 자원 할당 정보 송수신 방법

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EP3422785A1 (fr) * 2010-12-22 2019-01-02 Fujitsu Limited Procédé d'attribution de ressources, procédé de transmission d'informations d'état de canal, station de base et équipement utilisateur
WO2021050001A1 (fr) * 2019-09-13 2021-03-18 Panasonic Intellectual Property Corporation Of America Appareil de communication et procédé de communication pour opération de demande de répétition automatique hybride

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