WO2011095069A1 - Procédé, dispositif et système pour indiquer le mode d'attribution de ressources - Google Patents

Procédé, dispositif et système pour indiquer le mode d'attribution de ressources Download PDF

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Publication number
WO2011095069A1
WO2011095069A1 PCT/CN2011/070154 CN2011070154W WO2011095069A1 WO 2011095069 A1 WO2011095069 A1 WO 2011095069A1 CN 2011070154 W CN2011070154 W CN 2011070154W WO 2011095069 A1 WO2011095069 A1 WO 2011095069A1
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Prior art keywords
resource allocation
downlink control
control information
information format
base station
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PCT/CN2011/070154
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English (en)
Chinese (zh)
Inventor
朱鹏
郝鹏
喻斌
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中兴通讯股份有限公司
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Publication of WO2011095069A1 publication Critical patent/WO2011095069A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a resource allocation mode indication method, apparatus, and system.
  • a resource allocation mode indication method, apparatus, and system BACKGROUND OF THE INVENTION
  • the system uses a centralized scheduling of base stations to control the transmission of Physical Uplink Shared Channel (PUSCH) of user equipment (User Equipment, UE).
  • PUSCH Physical Uplink Shared Channel
  • UE User Equipment
  • the uplink scheduling information of the physical uplink shared channel PUSCH is sent by the base station to the target UE through a Physical Downlink Control Channel (PDCCH).
  • the physical downlink control channel carries Downlink Control Information (DCI), including downlink or uplink scheduling information, and uplink transmit power control commands.
  • DCI Downlink Control Information
  • the LTE system defines multiple downlink control information formats (DCI formats).
  • the uplink scheduling information of the physical shared channel PUSCH is carried in the downlink control information format 0 (DCI format 0). If the UE detects the PDCCH with the DCI format 0 format, according to the uplink scheduling information contained therein, the PUSCH is transmitted on the allocated channel resource by using the indicated modulation and coding mode and the corresponding transmit power.
  • the physical uplink shared channel of multiple user terminals in the small area is frequency-division multiplexed with the uplink system bandwidth, that is, the PUSCHs of different UEs are orthogonal in the frequency domain.
  • the base station indicates the radio channel resource allocated by the PUSCH of the target UE in DCI format 0.
  • LTE system uplink resource allocation (resource allocation) with resource blocks (Resource Block,
  • RB is the unit.
  • a resource block is used to describe a mapping of a physical channel (Physical Channel) to a resource element (Resource Element, RE).
  • Two resource blocks are defined: Physical Resource Block (PRB) and Virtual Resource Block (VRB). Representing a physical resource block PRB contiguous subcarriers (subcarrier) in the frequency domain, representing the b successive symbols in the time domain.
  • PRB Physical Resource Block
  • VRB Virtual Resource Block Representing a physical resource block PRB contiguous subcarriers (subcarrier) in the frequency domain, representing the b successive symbols in the time domain.
  • N 12 and the subcarrier spacing is 15 kHz, that is, the width of a PRB in the frequency domain is 180 kHz.
  • 3 ⁇ 4 7
  • extended cyclic prefix extended CP
  • 3 ⁇ 4 6
  • the length of a PRB in the time domain is one slot (slot, 0.5ms).
  • one PRB includes N b xN s resource units.
  • W PRB takes the regular cyclic prefix as an example.
  • the structure of PRB is shown in Figure 1.
  • a virtual resource block VRB has the same structure and size as the PRB. Two types of VRBs, a virtual resource blocks of distributed type and a virtual resource blocks of localized type (VRB) are defined. When resources are allocated, a pair of VRBs located in two slots in one subframe (frame) are allocated together, and a pair of VRBs have an index " VRB .”
  • the centralized VRB maps directly to the PRB, ie
  • the mapping of VRB to PRB is the same on two slots within one subframe.
  • the distributed VRB is mapped to the PRB according to certain rules.
  • the PUSCH uses a continuous resource allocation manner, that is, the PUSCH of one UE occupies a continuous bandwidth in the frequency domain. This bandwidth is part of the bandwidth of the entire uplink system, including a set of consecutive PRBs.
  • the number of PRBs is TM SCH and the number of consecutive subcarriers included is
  • the base station gives a Resource Indication Value in DCI format 0.
  • RIV indicates the starting position start and length ⁇ of a group of consecutive VRBs according to the tree representation method, where START is the index of the starting VRB in the continuous VRB of the group, and is the number of VRBs included in the continuous VRB of the group.
  • the resource indication is "log 2 (A (i + l)/2)] bits, which is the number of resource blocks corresponding to the uplink system bandwidth.
  • the physical uplink shared channel is transmitted using a single antenna port.
  • the LTE-Advanced system (referred to as the LTE-A system) is a next-generation evolution system of the system. As shown in Figure 3, the LTE-A system uses carrier aggregation technology to extend the transmission bandwidth. Each aggregated carrier is called a component carrier. Multiple component carriers may be contiguous or non-contiguous, may be in the same frequency band, or may be in different frequency bands.
  • the physical uplink shared channel of the user terminal within one component carrier may adopt a continuous or non-contiguous resource allocation manner.
  • the so-called continuous resource allocation that is, similar to the LTE system, the physical uplink shared channel of the user terminal occupies a continuous bandwidth in one component carrier; the so-called discontinuous resource allocation means that the physical uplink shared channel of the user terminal occupies within one component carrier.
  • Multi-segment bandwidth these bandwidths are non-contiguous, each segment of bandwidth contains a set of consecutive PRBs, called a cluster, as shown in Figure 4.
  • the uplink discontinuous resource allocation of the LTE-A system can refer to the downlink resource allocation of the LTE system.
  • RBG is defined as a set of consecutive PRBs
  • the size of the resource block group P (RBG size, ie the number of resource blocks included in the resource block group) is a function of the system bandwidth.
  • the LTE system bandwidth can be configured to 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz, and the corresponding PRB numbers are 6, 15, 25, 50, 75, 100.
  • the size of the resource block group is also different, that is, the granularity of resource allocation is different, as shown in Table 4.
  • the index of the resource block group is 0,..., ⁇ ⁇ -1 in order of increasing frequency.
  • the resource allocation mode type 0 uses a bitmap (bit map) to indicate the allocated resource block group, and each resource block group from index 0 to N ⁇ -l sequentially corresponds to each bit from the highest bit to the lowest bit in the bitmap.
  • a bit of 1 indicates that the corresponding resource block group is assigned to the target user terminal, and a value of 0 indicates that it is not assigned to the target user terminal.
  • the resource allocation mode type 1 uses a bitmap to indicate the allocated resource block in the resource block group (RBG subset, also called resource block subset) on the basis of type 0. It has the same signaling overhead as type 0.
  • RBG subset also called resource block subset
  • the physical uplink shared channel can be transmitted by using a single antenna port or by using multiple antenna ports.
  • the LTE system there is only one resource allocation mode for the physical uplink shared channel, that is, a continuous resource allocation mode; in the LTE-A system, there is at least one of the physical uplink shared channel except the continuous resource allocation mode.
  • Other resource allocation methods that support non-contiguous resource allocation.
  • the invention provides a resource allocation mode indication method, device and system, which solves the problem that the resource allocation mode cannot be flexibly configured according to actual application requirements.
  • a method for indicating a resource allocation manner including:
  • the base station constructs a downlink control information format, and the downlink control information format carries resource allocation mode indication information indicating a resource allocation manner;
  • the base station sends the downlink control information format to the terminal, and uses the resource allocation mode indicated by the resource allocation manner to perform scheduling on the physical uplink shared channel corresponding to the terminal.
  • the resource allocation mode indication information is a resource allocation mode indication bit
  • the base station constructs a downlink control information format
  • the step of carrying the resource allocation mode indication information indicating the resource allocation mode in the downlink control information format includes:
  • the base station determines the value of the resource allocation mode indication bit according to the resource allocation mode used by the base station; the base station constructs a downlink control information format, and the downlink control information format includes the resource allocation mode indication bit.
  • the resource allocation mode indication bit is 1 bit.
  • the resource allocation manner includes a continuous resource allocation manner and another resource allocation manner, where the other resource allocation manners are one or more resource allocation modes that support discontinuous resource allocation, and the base station determines according to the resource allocation manner used.
  • the steps of the resource allocation mode indicating the value of the bit include:
  • the resource allocation manner includes a continuous resource allocation manner and another resource allocation manner, where the other resource allocation manners are one or more resource allocation manners that support non-contiguous resource allocation, and the resource allocation manner indication information is a cyclic redundancy school.
  • a mask (MASK) of the CRC, the base station constructing a downlink control information format, and the step of carrying the resource allocation manner indication information indicating the resource allocation manner in the downlink control information format includes: The base station adds a mask to the CRC when the continuous resource allocation mode is used, and does not add a mask to the CRC when other resource allocation modes are used; or
  • the base station adds a mask indicating a continuous resource allocation manner to the CRC when the continuous resource allocation mode is used;
  • the base station constructs a downlink control information format according to a resource allocation manner, and the downlink control information format includes the CRC.
  • the method further includes: after the step of the base station transmitting the downlink control information format to the terminal, and using the resource allocation mode indicated by the resource allocation manner to perform the scheduling of the physical uplink shared channel corresponding to the terminal, the method further includes:
  • the terminal receives the downlink control information format, and according to the downlink control information format, completes scheduling of a physical uplink shared channel transmitted by the single antenna port corresponding to the terminal or a physical uplink shared channel transmitted by the multiple antenna port.
  • the invention also provides a base station, comprising:
  • An indication construction module configured to: construct a downlink control information format, and carry, in the downlink control information format, resource allocation manner indication information indicating a resource allocation manner;
  • the indication sending module is configured to: send the downlink control information format to the terminal, and use the resource allocation manner indicated by the resource allocation manner indication information to schedule the physical uplink shared channel corresponding to the terminal.
  • the indication construction module includes:
  • An indication bit determining unit configured to: determine a value of a resource allocation mode indication bit according to a resource allocation manner used;
  • an information construction unit configured to: construct a downlink control information format, where the downlink control information format includes the resource allocation mode indication bit.
  • the resource allocation mode includes a continuous resource allocation mode and another resource allocation mode, where the other resource allocation mode is one or more resource allocation modes that support non-contiguous resource allocation, and the resource allocation mode indication information is a CRC mask.
  • the indication construction module includes:
  • a mask processing unit configured to: add the CRC when the continuous resource allocation mode is used
  • An information construction unit is configured to: construct a downlink control information format, where the downlink control information format includes the CRC.
  • the present invention also provides a resource allocation manner indication system, including a base station and a terminal under the base station;
  • the base station is configured to: construct a downlink control information format, and carry the resource allocation mode indication information indicating the resource allocation manner in the downlink control information format, and send the downlink control information format to the terminal, where the resource allocation mode indication is used
  • the resource allocation mode indicated by the information is used to schedule the physical uplink shared channel corresponding to the terminal.
  • the terminal is configured to: receive the downlink control information format, and complete, according to the downlink control information format, a physical uplink shared channel that is transmitted by the single antenna port corresponding to the terminal or a physical uplink shared channel that is transmitted by multiple antenna ports. Scheduling.
  • An embodiment of the present invention provides a method, an apparatus, and a system for indicating a resource allocation manner.
  • the base station constructs a downlink control information format, and the downlink control information format carries resource allocation mode indication information indicating a resource allocation manner, and provides the terminal information to the terminal. Transmitting the downlink control information format, using the resource allocation manner indicated by the resource allocation manner indication information, scheduling the physical uplink shared channel corresponding to the terminal, and solving the problem that the resource allocation manner cannot be flexed according to actual application requirements. Configuration problem.
  • FIG. 1 is a schematic diagram of a physical resource block structure of an LTE system (taking a conventional cyclic prefix as an example);
  • FIG. 2 is a schematic diagram of a physical uplink shared channel structure of an LTE system (taking a conventional cyclic prefix as an example);
  • FIG. 3 is a schematic diagram of carrier aggregation in an LTE-A system
  • FIG. 4 is a schematic diagram of a PUSCH discontinuous resource allocation in a component carrier of an LTE-A system.
  • FIG. 5 is a flowchart of a method for indicating a resource allocation manner according to Embodiment 1 of the present invention;
  • FIG. 6 is a flowchart of an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of the indication structure module 601 of FIG. 6 according to an embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of the indication structure module 601 of FIG. 6 according to still another embodiment of the present invention.
  • the present invention provides a method for indicating a resource allocation manner, in which a base station carries resource allocation mode indication information indicating a resource allocation manner in a downlink control information format (DCI format) for scheduling a physical uplink shared channel, and formats the downlink control information. Send to the target user terminal.
  • DCI format downlink control information format
  • the target terminal After receiving the downlink control information format, the target terminal determines a resource allocation manner used by the downlink control information format according to the resource allocation manner indication information included therein, and further reads the resource in the downlink control information format. Assign information.
  • the uplink system bandwidth of one component carrier is represented by the corresponding PRB number A, and the base station transmits the single-antenna or multi-antenna port transmission of the user terminal through the downlink control information format.
  • the physical uplink shared channel transmits uplink data.
  • a first embodiment of the present invention provides a method for indicating a resource allocation manner. The process for completing the indication of a terminal resource allocation manner by using the method is as shown in FIG. 5, and includes:
  • Step 501 The base station constructs a downlink control information format, and carries, in the downlink control information format, resource allocation mode indication information indicating a resource allocation manner;
  • the resource allocation mode indication information is specifically a resource allocation mode indication bit, and the resource allocation mode indication bit is 1 bit, and the resource allocation mode indication bit has 0 and 1 values, respectively representing continuous resource allocation.
  • Other resource allocation modes are one or more resource allocation modes that support non-contiguous resource allocation, such as resource allocation mode type 0 or type l.
  • the resource allocation mode indication bit "0" represents a continuous resource allocation mode
  • the resource allocation mode indication bit "1" represents another resource allocation mode (one or more resource allocation modes supporting non-contiguous resource allocation)
  • the former is explained by way of example.
  • the downlink control information format also carries resource allocation information.
  • the resource allocation information is specifically resource block allocation information, and the length of the information is “log 2 (A (i + l) / 2)] Bit, used to indicate the allocated resource block.
  • the resource allocation information is used to indicate a specific resource allocation of the terminal.
  • the resource allocation information includes a resource allocation header and a resource block assignment
  • the resource allocation header is 1-bit information, which is used to further distinguish the resource allocation modes type 0 and type 1 , and the type 0 resource allocation header.
  • a value of 0 means that type 1 is represented by 1.
  • log 2 0P bit as the header of the resource allocation type type 1 to indicate the selected resource.
  • 1 bit used to indicate whether the resource allocation span is shifted in the selected subset of resource blocks, and a value of 1 indicates a shift trigger, and a value of 0 indicates that the shift is not triggered;
  • a / ⁇ _ "log 2 (P)] - l bit used to indicate the allocated resource block.
  • the resource allocation may be ignored. Header, the default resource allocation method type 0.
  • the resource allocation modes type 0 and type 1 are the downlink resource allocation modes of the LTE system, type 0 and type 1, respectively.
  • the resource block group size P (RBG size, that is, the number of resource blocks included in the resource block group) depends on the uplink system bandwidth A of the component carrier, as shown in Table 5.
  • Step 502 The base station sends the downlink control information format to the terminal, and uses the resource allocation mode indicated by the resource allocation mode indication information to schedule the physical uplink shared channel corresponding to the terminal.
  • the base station sends a downlink control information format with the resource allocation mode indication information to the terminal, and after receiving the downlink control information format, the terminal can determine the downlink control information format according to the resource allocation mode indication information included in the terminal. The way resources are allocated.
  • step 501 in the case that the other resource allocation modes (such as one or more resource allocation modes supporting non-contiguous resource allocation) are used in step 501, "1 0 ⁇ 2 ( ⁇ () can also be carried in the downlink control information format. ⁇ + 1)/2)] +1 bit resource allocation information for indicating the allocated resource block group.
  • the resource block group size ⁇ depends on the uplink system bandwidth A of the component carrier, as shown in Table 5.
  • the uplink system bandwidth of one component carrier is represented by the corresponding PRB number A.
  • the base station transmits the uplink data by scheduling the physical uplink shared channel transmitted by the single-antenna or multi-antenna port of the user terminal through the downlink control information format.
  • the resource allocation mode indication information is specifically a cyclic redundancy check (CRC) mask (MASK).
  • CRC cyclic redundancy check
  • the CRC is added to the CRC of the downlink control information format to indicate the scheduled The resource allocation mode of the physical uplink shared channel. You can add a mask to the CRC when you choose to use the continuous resource allocation method, or you can add a mask to the CRC when you choose to use other resource allocation methods, such as one or more resource allocation methods that support non-contiguous resource allocation.
  • the overhead of the resource allocation information in the downlink control information format is a "log 2 (A (i + 1)/2)] bit, which is used to indicate the allocated resource block.
  • the overhead of the resource allocation information in the downlink control information format is “1 0 ⁇ 2 ( ⁇ ( ⁇ + 1)/2)]+1 bits, which is used to indicate the allocated resource block group.
  • the resource block group size depends on the uplink system bandwidth N of the component carrier, as shown in Table 5.
  • the embodiment of the present invention further provides a base station, and the structure thereof is as shown in FIG. 6 , and includes: an indication construction module 601, configured to construct a downlink control information format, where the downlink control information format carries a resource indicating a resource allocation manner Distribution method indication information;
  • the indication sending module 602 sends the downlink control information format to the terminal, and uses the resource allocation manner indicated by the resource allocation manner indication information to schedule the physical uplink shared channel corresponding to the terminal.
  • the structure of the indication construction module is as shown in FIG. 7, and includes:
  • the indication bit determining unit 701 is configured to determine a value of the resource allocation mode indication bit according to the resource allocation manner used;
  • the information construction unit 702 is configured to construct a downlink control information format, where the downlink control information format includes the resource allocation mode indication bit.
  • the indication construction module is further as shown in FIG. 8, and includes: Add a mask to add a mask to the CRC when other resource allocation methods are used; or,
  • the information construction unit 802 is configured to construct a downlink control information format, where the CRC is included in the downlink control information format.
  • An embodiment of the present invention further provides a resource allocation manner indication system, including a base station and a lower terminal thereof;
  • the base station is configured to construct a downlink control information format, where the downlink control information format carries resource allocation mode indication information indicating a resource allocation manner, and sends the downlink control information format to the terminal, where the resource allocation mode indication is used.
  • the resource allocation mode indicated by the information is used to schedule the physical uplink shared channel corresponding to the terminal.
  • the terminal is configured to receive the downlink control information format, and complete physical uplink of a physical uplink shared channel or multiple antenna port transmissions for a single antenna port corresponding to the terminal according to the downlink control information format. Scheduling of shared channels.
  • the base station and the resource allocation mode indication system may be combined with the resource allocation mode indication method provided by the embodiment of the present invention, where the base station constructs a downlink control information format, and the downlink control information format carries an indication resource allocation manner.
  • the resource allocation mode indication information, and the downlink control information format is sent to the terminal, and the physical uplink shared channel corresponding to the terminal is scheduled by using the resource allocation mode indicated by the resource allocation mode indication information, and the solution cannot be solved according to the actual situation.
  • Applications need to be flexible in configuring resource allocation methods.
  • the embodiment of the present invention provides a method, an apparatus, and a system for indicating a resource allocation manner.
  • the base station constructs a downlink control information format, and the downlink control information format carries resource allocation mode indication information indicating a resource allocation manner. And sending the downlink control information format to the terminal, and using the resource allocation manner indicated by the resource allocation manner indication information, scheduling the physical uplink shared channel corresponding to the terminal, and solving the resource allocation manner that cannot be implemented according to actual application requirements.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé, un dispositif et un système pour indiquer le mode d'attribution de ressources. L'invention concerne le domaine des communications mobiles et résout le problème dans lequel une configuration flexible du mode d'attribution de ressources ne peut pas être réalisée selon les exigences réelles des applications. Le procédé comprend les étapes suivantes : une station de base construit un format d'informations de commande de liaison descendante (DCI) et le format DCI porte des informations d'indication pour le mode d'attribution de ressources indiquant le mode d'attribution de ressources; la station de base envoie le format DCI à un terminal et, par l'utilisation du mode d'attribution de ressources indiqué par les informations d'indication pour le mode d'attribution de ressources, programme le canal partagé de liaison montante physique (PUSCH) correspondant au terminal. La solution technique obtenue par l'invention peut être appliquée à un système d'évolution à long terme (LTE) et un système avancé d'évolution à long terme (LTE-A).
PCT/CN2011/070154 2010-02-03 2011-01-10 Procédé, dispositif et système pour indiquer le mode d'attribution de ressources WO2011095069A1 (fr)

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