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WO2011153700A1 - Procédé pour la transmission et la réception d'un message, station de base et station mobile - Google Patents

Procédé pour la transmission et la réception d'un message, station de base et station mobile Download PDF

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Publication number
WO2011153700A1
WO2011153700A1 PCT/CN2010/073757 CN2010073757W WO2011153700A1 WO 2011153700 A1 WO2011153700 A1 WO 2011153700A1 CN 2010073757 W CN2010073757 W CN 2010073757W WO 2011153700 A1 WO2011153700 A1 WO 2011153700A1
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Prior art keywords
message
dci
value
ndi
mcs
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Ceased
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PCT/CN2010/073757
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English (en)
Chinese (zh)
Inventor
王轶
王键
周华
吴建明
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Fujitsu Ltd
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Fujitsu Ltd
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Priority to CN2010800644032A priority Critical patent/CN102771169A/zh
Priority to PCT/CN2010/073757 priority patent/WO2011153700A1/fr
Publication of WO2011153700A1 publication Critical patent/WO2011153700A1/fr
Anticipated expiration legal-status Critical
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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
    • 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 generally relates to transmission techniques for wireless communication systems and, more particularly, to methods and apparatus for transmitting and receiving messages for indicating uplink discontinuous resource allocation.
  • the uplink uses a single carrier frequency division multiplexing technology, that is, SC-FDMA (Single Carrier-FDMA).
  • Fig. 1 shows a PUSCH data mapping flow using SC-FDMA.
  • the base station carries control signaling for the uplink shared data channel (PUSCH, Physical Uplink Shared Channel) through the downlink control information (DCI) format 0.
  • the main contents of DCI 0 include physical resource allocation information of PUSCH, modulation and coding information, pilot information, and the like.
  • various downlink control information is transmitted by the base station on the physical downlink control channel (PDCCH), and is mainly divided into DCIs for downlink scheduling (indicating PDSCH) (for example, DCI 1/2/2A, etc.) And DCI 0 for uplink scheduling (indicating PUSCH).
  • the mobile station receives the PDCCH and performs blind detection on the possible DCIs that are sent to itself. If the DCI information is detected for itself, the PUSCH is transmitted or received according to the DCI information.
  • the maximum number of blind detections per user is 44.
  • the present invention is directed to at least solving the above technical problems in the prior art, and provides a DCI message transmitting and receiving method and apparatus for indicating uplink discontinuous resource allocation.
  • a method of transmitting a message for indicating uplink discontinuous resource allocation includes: carrying information indicating uplink non-contiguous resource allocation and content identification information in a message having the same length as a DCI for downlink scheduling, wherein the content identification information indicates that the message is for indication a message for uplink non-contiguous resource allocation; performing post-processing including inserting a cyclic redundancy check (CRC) code, channel coding, and modulation on the message; and transmitting the message through a physical downlink control channel.
  • the content identification information is carried in a location in the message corresponding to a modulation and coding scheme (MCS) and a new data indication (NDI) in the DCI for downlink scheduling.
  • MCS modulation and coding scheme
  • NDI new data indication
  • a message receiving method includes: receiving a message by using a physical downlink control channel; performing pre-processing including demodulation, channel decoding, and CRC check on the message to obtain a source message having the same length as a DCI for downlink scheduling Detecting content identification information in a location corresponding to the MCS and the NDI in the DCI for downlink scheduling in the message, to determine whether the source message is a message indicating an uplink discontinuous resource allocation; And if it is determined that the source message is a message for indicating uplink discontinuous resource allocation, information indicating an uplink discontinuous resource allocation is obtained from the source message.
  • a base station includes: a message construction unit configured to carry information indicating the uplink discontinuous resource allocation and content identification information in a message having the same length as the DCI used for downlink scheduling, where the content identification information indicates The message is a message for indicating uplink discontinuous resource allocation; a post-processing unit configured to perform post-processing including inserting a cyclic redundancy check code, channel coding, and modulation on the message constructed by the message construction unit; And a sending unit, configured to send, after the post-processing unit, the processed message by using a physical downlink control channel.
  • the message construction unit is further configured to carry the content identification information in a location in the message corresponding to the modulation and coding mode and the new data indication in the DCI for downlink scheduling.
  • a mobile station is provided.
  • the multi-stage includes: a receiving unit configured to receive a message by using a physical downlink control channel; and a pre-processing unit configured to perform pre-demodulation, channel decoding, and CRC check on the message received by the receiving unit Processing to obtain a source message having the same length as downlink control information for downlink scheduling; and a message parsing unit configured to correspond to the downlink control information for downlink scheduling in the source message Detecting content identification information in a modulation coding mode and a location indicated by the new data, to determine whether the source message is a message for indicating uplink discontinuous resource allocation, and if the source message is determined to be used to indicate an uplink non-
  • the message of the continuous resource allocation acquires information indicating the allocation of the uplink discontinuous resource from the source message.
  • FIG. 1 shows a PUSCH data mapping process using SC-FDMA.
  • FIG. 2 shows a PUSCH data mapping using CL-DFT-S-OFDM to transmit a flow.
  • FIG. 3 illustrates a MCS and NDI value range of a downlink scheduling DCI and a MCS and NDI value range of an uplink discontinuous resource allocation DCI according to an embodiment of the present invention.
  • FIG. 4 shows a flow chart of a message transmission method for indicating uplink discontinuous resource allocation, in accordance with an embodiment of the present invention.
  • 5A and 5B show bit information formats of DCI 1 and DCI 2 of the LTE system, respectively.
  • 6A-6C respectively show examples of bit information formats of DCIs for uplink discontinuous resource allocation, in accordance with an embodiment of the present invention.
  • FIG. 7 shows a flow chart of a message receiving method according to an embodiment of the present invention.
  • FIG. 8 shows a schematic block diagram of a base station according to an embodiment of the present invention.
  • FIG. 9 shows a schematic block diagram of a mobile station in accordance with an embodiment of the present invention.
  • FIG. 10 shows a schematic block diagram of a wireless communication system in accordance with an embodiment of the present invention.
  • the new DCI length can be limited to the same length as some existing DCIs in the LTE system.
  • the new DCI length may be the same as the single carrier uplink DCI 0 length, or the new DCI length may be the same length as the DCI for downlink scheduling (such as DCI 1/2/2A, etc.). Since the length of the single-carrier uplink DCI 0 is limited, if the new DCI and the DCI 0 are equal in length, the flexibility of the discontinuous resource allocation, such as limiting the number of blocks of the discontinuous frequency domain resources, is limited.
  • designing a new DCI of the same length as DCI 1/2/2A for downlink jitter is a more flexible and better performance method.
  • a new DCI having the same length as a DCI (such as DCI 1/2/2A or the like) for downlink scheduling is used to indicate uplink discontinuous resource allocation, and by utilizing Modulation Coding (MCS) information bits and New Data Indication (NDI) bits in the DCI for downlink strength to distinguish between DCI for downlink scheduling and new DCI for uplink discontinuous resource allocation.
  • MCS Modulation Coding
  • NDI New Data Indication
  • DCIs for indicating downlink scheduling include MCS information and NDI information.
  • the MCS information is 5 bits, corresponding to 32 modulation and coding rate combinations and corresponding transport block sizes, as shown in Table 1.
  • Table 1 Modulation Coding (MCS) and Transport Block Size (TBS) Index 3 is a schematic diagram showing an MCS and NDI value range of a downlink scheduling DCI and an MCS and NDI value range of an uplink discontinuous resource allocation DCI according to an embodiment of the present invention.
  • MCS Modulation Coding
  • TBS Transport Block Size
  • the same transport block size as the initial transmission is used in the retransmission, and only the modulation scheme can be changed. Therefore, for a DCI for indicating downlink scheduling such as DCI 1/2/2A, a combination in which MCS is 29-31 and NDI is 1, and a combination in which MCS is 0-28 and NDI is 0 is unlikely.
  • the value of NDI is used to distinguish between new data and retransmitted data. As described above, it is also possible to distinguish between new data and retransmitted data by using the transformation of the NDI value.
  • the MCS is 29-31 and the NDI value is changed from the NDI in the previously received DCI, and the MCS is 0-28. And the NDI value remains the same combination as the NDI in the previously received DCI.
  • a new combination of MCS and NDI values different from the effective combination of the MCS value and the NDI value in the DCI for downlink scheduling may be used to identify a new indication for uplink.
  • DCI for non-contiguous resource allocation may be used to identify a new indication for uplink.
  • the 5-bit value range corresponding to the MCS in the DCI for downlink scheduling is defined in the new DCI to be 29-31.
  • the 1-bit value corresponding to the NDI in the DCI for downlink scheduling is an NDI value indicating new data in the DCI for downlink scheduling; or the 5-bit value range corresponding to the MCS is 0- 28 and the 1 bit value corresponding to the NDI is an NDI value indicating retransmission data in the DCI for downlink scheduling.
  • the mobile station may determine whether the received DCI information is a DCI for downlink scheduling or a DCI for uplink discontinuous resource allocation according to the combination of the MCS and the NDI.
  • the 1-bit value corresponding to the NDI is the NDI value indicating the retransmission data in the DCI for downlink scheduling
  • 1 bit corresponding to any one of the highest 3 bits of the MCS is used.
  • the combination of 1 bit corresponding to the DNI can identify the DCI used for uplink discontinuous resource allocation. Setting the value of 1 bit corresponding to any one of the highest 3 bits of the MCS in the new DCI to 0 ensures that the value of the 5 bits of the MCS is in the range of 0-28. In this way, the remaining 4 bits in the MCS can be used to carry other information, thereby increasing the bit utilization and information capacity of the new DCI.
  • the remaining bit information of the new DCI may be newly defined as needed to transmit physical resource allocation information, modulation and coding information, Pilot and other information. The definition of the remaining bit information will be described below.
  • a message transmission method for indicating uplink discontinuous resource allocation is usually performed by a base station. As shown in FIG. 4, in step S410, a message for indicating uplink discontinuous resource allocation is constructed. In accordance with an embodiment of the present invention, to avoid increasing the number of blind detections of the mobile station, a message of the same length as the DCI for downlink scheduling is used to indicate uplink discontinuous resource allocation. Information indicating the uplink discontinuous resource allocation and content identification information are carried in the message. The content identification information is used to identify that the message is a message for indicating uplink discontinuous resource allocation.
  • step S420 the message is post-processed. Specifically, a CRC code is added to the message, and then channel coding, that is, convolutional code coding, is performed, and then rate matching can be performed. Modulation is performed after scrambling single or multiple DCIs of a single user or multiple users.
  • step S430 the scrambled DCI information is mapped to the physical resource of the PDCCH, and transmitted through the PDCCH.
  • the internal identities information can be carried in the message at positions corresponding to the MCS and NDI in the DCI for downlink scheduling.
  • the value of the content identification information may be set to a value different from the effective combination of the MCS value and the NDI value in the DCI.
  • a value of a position in the message corresponding to an NDI in a DCI for downlink scheduling may be set to be represented in the DCI
  • the NDI value of the new data and the DCI in the message for downlink scheduling The value of the position corresponding to the MCS in the medium is set to any one of 29-31.
  • a value of a location in the message corresponding to an NDI in a DCI for downlink scheduling may be set as an NDI value indicating retransmission data in the DCI, and the message is used in
  • the value of the position corresponding to the MCS in the DCI of the downlink scheduling is set to any one of 0-28.
  • content identification information may be carried in one of the highest three bits of the MCS in the message and the DCS for downlink scheduling. And the corresponding position of the NDI. For example, a value of a location in the message corresponding to an NDI in a DCI for downlink scheduling may be set to an NDI value representing retransmission data in a DCI for downlink scheduling, and the The value of the position in the message corresponding to the one of the highest three bits of the MCS in the DCI is set to zero.
  • the following describes a new DCI message corresponding to MCS and NDI when a message having the same length as DCI 1 and DCI 2 for downlink scheduling is used to indicate uplink discontinuous resource allocation.
  • 5A and 5B show bit information formats of DCI 1 and DCI 2 of the LTE system, respectively.
  • the physical resource allocation information is used to indicate a downlink physical resource allocation and a downlink resource allocation manner.
  • HARQ indicates the number of hybrid retransmission processes.
  • RV is the redundancy version information.
  • TPC is power control information (transmit power control).
  • DCI 2 can support two transport blocks, so the signaling includes MCS, NDI and RV information of two transport blocks, and exchange information between two transport blocks (TB swap, Transport Block swap) o
  • FIGS. 6A-6C respectively show examples of bit information formats of DCIs for uplink discontinuous resource allocation, in accordance with an embodiment of the present invention.
  • the length of the DCI message for uplink discontinuous transmission in Figs. 6A and 6B is the same as that of DCI 1, and the message length is the same as DCI 2 in Fig. 6C.
  • 6 bits of the position corresponding to the 6-bit information of the MCS and the NDI of the DCI 1 are reserved in the DCI as the content identification information of the message, and are used to distinguish the uplink non-contiguous resource. Assigned DCI and DCI 1.
  • the remaining 6 bits are removed and the remaining bit information can be redefined. For example, the first 21 bits are used to indicate uplink discontinuous physical resource allocation information, and the next 5 bits are used to indicate MCS information, and 3 bits after reserved 5 bits (left oblique line padding) are used for cyclic shift of uplink pilots.
  • CS channel quality indication
  • TPC power control information
  • the lower 4 bits corresponding to the remaining bits of the resource allocation in DCI 1 and the lower 4 bits corresponding to the MCS constitute the MCS information in the new DCI, and the allocation of the remaining bits is the same as in FIG. 6A.
  • the DCI information is DCI for downlink scheduling, and the NDI indicates retransmission data and the highest MCS bit in DCI 1
  • the DCI information is DCI for uplink discontinuous resource allocation.
  • 6 bits of the DCI corresponding to the MCS of the DCI 2 and the 6-bit information of the NDI are reserved for distinguishing the DCI and the DCI 1.
  • the remaining 6 bits are removed and the remaining bits can be redefined.
  • the reserved bits of the first set of MCS and NDI in DCI 2 are reserved.
  • any of the MCS and DCI bits in the DCI 2 can be reserved without limitation.
  • the second set of MCS and DCI bits in DCI 2 may also be reserved.
  • Figures 6A-6C show only illustrative examples, and those skilled in the art can envision more examples of bit information formats.
  • FIG. 7 shows a flow chart of a message receiving method according to an embodiment of the present invention.
  • the message receiving method according to the present invention is usually performed by a mobile station.
  • the mobile station performs a search in the time-frequency resource space in which the PDCCH is expected to be received, and receives a message from the PDCCH.
  • the message transmitted on the PDCCH is a DCI message.
  • step S720 the received message is pre-processed to obtain a source DCI message having the same length as the DCI used for downlink scheduling.
  • the source DCI message may be a DCI for downlink scheduling, or may be a newly designed DCI for indicating uplink non-contiguous resource allocation in the present invention.
  • the pre-processing is an inverse operation corresponding to post-processing of the message during message transmission, including demodulation, channel decoding, and CRC face correction. If the CRC check result is incorrect, the DCI information is discarded.
  • the content identification information is detected at a location in the source DCI message corresponding to the MCS and the NDI in the DCI for the downlink scheduling having the length to determine whether the source DCI message is A DCI message indicating uplink discontinuous resource allocation or downlink scheduling.
  • the source when the value of the detected internal information is different from the effective combination of the MCS value and the NDI value in the DCI for downlink scheduling, the source is determined
  • the DCI message is a message for indicating uplink discontinuous resource allocation.
  • a value of a location in the source DCI message corresponding to the NDI in the DCI for downlink scheduling is an NDI value indicating new data in the DCI.
  • a value corresponding to an NDI in the DCI for downlink scheduling in the source DCI message is an NDI value indicating retransmission data in the DCI
  • the source DCI message is determined to be a DCI message for indicating uplink discontinuous resource allocation.
  • a location corresponding to one of the highest three bits of the MCS in the DCI for downlink scheduling and the NDI may also be in the source DCI message.
  • the content identification information is detected.
  • a value of a location in the source DCI message corresponding to an NDI in the DCI for downlink scheduling is an NDI indicating retransmission data in the DCI. a value, and determining, in the source message, that the value of the location corresponding to the one of the highest three bits of the MCS in the DCI is 0, determining that the source message is a DCI for indicating uplink discontinuous resource allocation Message.
  • step S740 information indicating the uplink non-contiguous resource allocation is obtained from the source DCI message.
  • the mobile station can allocate the uplink non-contiguous resources according to the obtained information of the non-contiguous resource allocation, and then send the corresponding PUSCH, as shown in step S750.
  • step S760 it is determined that the DCI message is a DCI message indicating downlink scheduling.
  • step S770 the PDSCH of the N destination is connected.
  • FIG. 8 shows a schematic block diagram of a base station according to an embodiment of the present invention.
  • the base station 800 includes a message construction unit 810, a post-processing unit 820, and a transmission unit 830.
  • the message construction unit 810 is configured to carry information indicating the uplink discontinuous resource allocation and content identification information in a message having the same length as the DCI used for downlink scheduling. Content
  • the identification information indicates that the message is a message indicating an uplink discontinuous resource allocation.
  • the post-processing unit 820 is configured to perform post-processing on the message constructed by the message construction unit 810 including insertion of a CRC code, channel coding, modulation, and the like.
  • the transmitting unit 830 is configured to send the post-processed message by the post-processing unit 820 through the PDCCH.
  • the message construction unit 810 is further configured to carry the content identification information at a location in the message corresponding to the MCS and NDI in the DCI for downlink scheduling.
  • the message construction unit 810 may be configured to set the value of the content identification information to be different from the effective combination of the MCS value and the NDI value in the DCI for downlink scheduling. value.
  • the message construction unit 810 may be further configured to carry content identification information in the message with the highest 3 bits of the MCS in the DCI for downlink scheduling.
  • One of the positions corresponds to the NDI.
  • FIG. 9 shows a schematic block diagram of a mobile station in accordance with an embodiment of the present invention.
  • the mobile station 900 includes a receiving unit 910, a pre-processing unit 920, and a message parsing unit 930.
  • the receiving unit 910 is configured to receive a message by using a PDCCH.
  • the pre-processing unit 920 is configured to perform pre-processing including demodulation, channel decoding, and CRC check on the message received by the receiving unit 910 to obtain a source message of the same length as the DCI used for downlink scheduling.
  • the message parsing unit 930 is configured to detect content identification information at a location corresponding to the MCS and the NDI in the DCI for downlink scheduling in the source message, to determine whether the source message is used to indicate uplink Messages for non-contiguous resource allocation. If it is determined that the source message is a message for indicating uplink discontinuous resource allocation, the message parsing unit 930 acquires information indicating the uplink discontinuous resource allocation from the source message.
  • the message parsing unit 930 may be further configured to use, when the value of the content identification information is different from the effective combination of the MCS value and the NDI value in the DCI for downlink scheduling.
  • the source message is determined to be a message indicating an uplink discontinuous resource allocation.
  • the message parsing unit 930 may be further configured to use one of the highest 3 bits corresponding to the MCS in the source message and the DCI for downlink scheduling.
  • the internal information is detected at the location of the NDI.
  • FIG. 10 shows a schematic block diagram of a wireless communication system in accordance with an embodiment of the present invention.
  • the wireless communication system 1000 is composed of a mobile station 1100 and a base station 1200.
  • the mobile station 1100 may be the mobile station 900 according to the embodiment of the present invention, and the base station 1200 may be the foregoing base station 800 according to an embodiment of the present invention.
  • the mobile station 1100 and the base station 1200 and the communication therebetween will not be described in detail.
  • each of the constituent modules and units in the above apparatus may be configured by software, firmware, hardware, or a combination thereof.
  • the specific means or manner in which the configuration can be used is well known to those skilled in the art and will not be described herein.
  • a program constituting the software is installed from a storage medium or a network to a computer having a dedicated hardware structure, and the computer can execute various functions and the like when installing various programs.
  • the method and apparatus of the present invention may be used in a system such as LTE/LTE-A to indicate uplink discontinuous resource allocation, such as physical resource allocation indicating PUSCH, modulation and coding information, and the like.
  • the control signaling used in the method and apparatus of the present invention is carried by the PDCCH with a length equal to the length of the control signaling DCI used to indicate downlink scheduling in the LTE system.
  • the special field of the signaling the signaling is differentiated into control signaling indicating uplink discontinuous resource allocation and control signaling indicating downlink scheduling.
  • the special field is the same as the location of the modulation coding information and the new data indication in the control signaling used by the LTE system to indicate downlink scheduling.
  • the mobile station can effectively distinguish the control signaling for downlink scheduling and the uplink discontinuous resource allocation control signaling without increasing the number of blind detections of the PDCCH, thereby avoiding the complexity of the mobile station.
  • the present invention also proposes a program product for storing an instruction code readable by a machine.
  • the instruction code is read and executed by a machine, the above-described method according to an embodiment of the present invention can be performed.
  • a storage medium for carrying a program product storing the above-described storage machine readable instruction code is also included in the disclosure of the present invention.
  • the storage medium includes, but is not limited to, a floppy disk, an optical disk, a magneto-optical disk, a memory card, a memory, and the like.
  • the method of the present invention is not limited to being performed in the chronological order described in the specification, and may be performed in other chronological order, in parallel or independently. Therefore, the order of execution of the methods described in the present specification does not limit the technical scope of the present invention.

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

Abstract

La présente invention se rapporte à un procédé pour la transmission d'un message. Le message sert à indiquer une allocation de ressource discontinue sur la liaison montante. L'invention se rapporte également à un procédé pour la réception du message, ainsi qu'à une station de base et à une station mobile. Le procédé pour la transmission d'un message servant à indiquer une allocation de ressource discontinue sur la liaison montante est mis en œuvre de la façon suivante : les informations servant à indiquer une allocation de ressource discontinue sur la liaison montante et des informations d'identification de contenu sont contenues dans le message ; la longueur du message est identique à celle des informations de contrôle sur la liaison descendante (DCI) pour la programmation sur la liaison descendante ; et les informations d'identification de contenu indiquent que le message est le message servant à indiquer l'allocation de ressource discontinue sur la liaison montante. Le post-traitement comprenant les étapes d'insertion du code de contrôle par redondance cyclique (CRC), de codage de voie et de modulation est exécuté sur le message. Ensuite, le message est transmis via le canal de contrôle physique sur la liaison descendante (PDCCH). Selon la présente invention, les informations d'identification de contenu sont contenues dans le message aux positions qui correspondent au schéma de codage et de modulation (MCS) et au nouvel indicateur de données (NDI) contenu dans les DCI, qui est utilisé pour la programmation sur la liaison descendante.
PCT/CN2010/073757 2010-06-10 2010-06-10 Procédé pour la transmission et la réception d'un message, station de base et station mobile Ceased WO2011153700A1 (fr)

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