WO2014166301A1 - Procédé et système de planification dans un système de communication mobile - Google Patents

Procédé et système de planification dans un système de communication mobile Download PDF

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Publication number
WO2014166301A1
WO2014166301A1 PCT/CN2014/000387 CN2014000387W WO2014166301A1 WO 2014166301 A1 WO2014166301 A1 WO 2014166301A1 CN 2014000387 W CN2014000387 W CN 2014000387W WO 2014166301 A1 WO2014166301 A1 WO 2014166301A1
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downlink subframe
subframe
frame structure
index indication
index
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PCT/CN2014/000387
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English (en)
Chinese (zh)
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WO2014166301A8 (fr
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马莉
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上海朗帛通信技术有限公司
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Publication of WO2014166301A1 publication Critical patent/WO2014166301A1/fr
Publication of WO2014166301A8 publication Critical patent/WO2014166301A8/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to a scheme for scheduling subframes in the field of mobile communication technologies, and in particular, relates to TDD (Time Division Duplex) LTE (Long Term) using elMTA (Enhanced Interference Traffic Adaptation) technology. Evolusion, long-term deduction) The scheme of downlink control signaling for scheduling uplink and downlink subframes in the system. Background technique
  • the 3GPP (3rd Generation Partner Project) defines the frame structure of the following TDD-LTE system, where D represents a downlink subframe, U represents an uplink subframe, and S is a special subframe:
  • the 3GPP further defines a parameter k for cross-subframe uplink subframe scheduling, as shown in Table 2.
  • k is: DCI for downlink scheduling in downlink subframe n (Downlink Control Indicator, downlink control indication), whose scheduled subframe is located in the n+k subframe.
  • DCI for downlink scheduling in downlink subframe n Downlink Control Indicator, downlink control indication
  • the uplink index indication can be configured to be 4, or 7, or 4 and 7.
  • the DCI including the 2 bits of the DCI for the scheduling reference of the PUSCH (Physical Uplink Shared Channel) is used to indicate the uplink subframe of the DCI scheduling. It should be noted that the two bits do not indicate the ULI in the non-#0 uplink reference TDD frame structure, but are used for the DAI (Downlink Assignment Index), that is, the uplink response/non corresponding to the DCI.
  • the PDSCH for which it is directed may only be the PDSCH indicated by the DCI transmitted by the n-k subframe, where k belongs to the subframe set K, as defined in Table 3.
  • TDD sub-frame index number ⁇ frame knot 1 2 3 4 5 6 7 8 9
  • 3GPP introduced the research topic of elMTA in R (Release, Version) 11. The main idea is to adjust the frame structure of TDD system more quickly according to the demand of uplink and downlink traffic of the cell. 3GPP evaluated three possible adjustment cycles:
  • the 10ms adjustment period provides the greatest degree of freedom and performance gain, making it a promising solution.
  • For the 10ms frame structure adjustment period there are some problems to be solved, such as frame structure configuration signaling design, HARQ (Hybrid Automatic Repeat Request) timing relationship, and the like.
  • a possible solution includes displaying a DCI configuration through a frame structure, or implicitly detecting whether a downlink subframe includes a DCI and whether the DCI schedules an uplink subframe.
  • a more feasible solution is to define an uplink reference frame structure and a downlink reference frame structure with reference to a carrier aggregation scheme with different frame structures defined by R11, regardless of the frame structure of the current frame transition, according to the uplink reference.
  • the frame structure performs an uplink HARQ operation, and performs a downlink HARQ operation in accordance with the downlink reference frame structure.
  • This scheme is described in 3GPP document R1-130558, R1-130130.
  • Another possibility is that the current frame is configured based on the display.
  • subframe-specific HARQ timing is adopted, for example, frame 1 is frame structure #2, frame 2 is frame structure #0, and subframe 8/9 in frame 1 can be separately scheduled according to HARQ timing of frame structure #2.
  • the uplink subframe 2/3 in frame 2 and the subframe 0/1 in frame 2 are uplink scheduled according to the HARQ timing in frame structure #0.
  • the candidate hopping frame structure in the elMTA includes the TDD frame structure #0 (ie, the uplink reference frame structure is TDD frame structure #0), on the one hand, the ULI indicates the allocated uplink subframe, and On the one hand, the DAI is required to indicate the number of uplink ACK/NACK bits or the number of subframes in which the ACK/NACK is bundled. This creates a problem with ULI/DAI bit collisions.
  • the frame structure of the candidate hopping includes the TDD frame structure ttO BP:
  • the TDD frame structure of the current SIB-1 configuration is #0.
  • the two ULI/DAI bits defined in the TDD do not change in 640 ms: either the DAI or the ULI is indicated according to the frame structure or the reference frame structure index.
  • the frame structure can be quickly switched between multiple frame structures including frame structure #0 (ie, when the TDD frame structure of the SIB-I configuration is ftO), then within one frame, Whether the fixed indication DAI or the fixed indication ULI, the existing definition can not fully meet the configuration requirements.
  • the ULI of each subframe contains 2 bits - 4 states, and the ULI in 4 subframes includes 8 bits - 256 states.
  • the inventor has found that in the actual transmission, the uplink subframe scheduling for indicating the frame structure #0 does not need to completely use the 256 states, and there are two methods for solving the ULI/DAI collision problem, and one method is flexible. Determining the ULI/DAI bit (hereinafter referred to as the index indication bit) on each subframe is used to indicate the ULI or the DAI, and the DAI information indicating the ULI is incomplete, and the method of reserving the maximum number of ACK/NACK bits is adopted.
  • the invention also discloses a scheduling method in a mobile communication system, in particular, a method for processing DCI in an uplink subframe for processing in a TDD user equipment, which is characterized in that the method includes the following steps.
  • the index indication bit is interpreted by performing one of the following steps:
  • the DAI information is obtained by interpreting the index indication bit
  • the ULI information is obtained by interpreting the index indication bit
  • the index indication property of the downlink subframe n is C3, the ULI/DAI synthesis information is interpreted by interpreting the index indication bit;
  • the current uplink reference frame structure is TDD frame structure #0.
  • the DAI and ULI information mapping reuses the mapping scheme in the existing standard, that is, the value of DAI is Mod (V_DAI, 4), where Mod (A, B) represents the remainder after A modulo B, V – DAI indicates the number of PDSCHs represented by the uplink acknowledgement/non-acknowledgement (ACK/NACK) corresponding to the DCI carrying the DAI.
  • the mapping method of the ULI depends on the uplink subframe index scheduled by the DCI carrying the ULI:
  • the downlink subframe n is a downlink subframe that does not belong to the TDD frame structure #0, determining that the index indication property of the downlink subframe n is C1
  • the method further includes the following steps:
  • ACK/NACK acknowledgenowledgement/non-acknowledgement
  • the number of bits and mapping of the ACK/NACK being obtained by assuming that all possible downlink subframes indicated by the ACK/NACK are transmitted by the PDSCH, Where k is obtained by interpreting the index indication bit.
  • the index indication bits on the downlink subframes in all TDD frame structures #0 are all determined to be ULI, and the UE (User Equipment, User Equipment) cannot determine the current DAI value, and thus cannot determine the number of ACK/NACK bits and the mapping method. Therefore, the UE needs to determine the number of ACK/NACK bits and the mapping method according to the maximum possibility, that is, the UE assumes that each downlink subframe in the ACK/NACK bundling indication window has transmitted the PDSCH.
  • This scheme is simpler to implement and is compatible with existing standards, but the problem is that a large number of ACK/NACK bits need to be reserved.
  • the uplink reference frame structure is #0 (ie, the DCI scheduling PUSCH, and the downlink ACK/NACK for the PUSCH, and the retransmission of the PUSCH comply with the HARQ timing of the frame structure #0), and the downlink reference frame structure is #5 (ie, the uplink ACK/NACK for the PDSCH, and the retransmission of the PDSCH comply with the HARQ timing of the frame structure #5), regardless of the frame structure of the current actual frame structure (eg, the possible frame structure includes 0/1/2/ 3/4/5/6), the uplink ACK/NACK can only be sent in subframe 2, and each ACK/NACK should indicate at most 9 downlink subframes, that is, for the physical uplink control channel (PUCCH-Physical Upl) Ink Control Channel) For format 3, 9 bits need to be reserved.
  • PUCCH-Physical Upl Physical Upl
  • 9 bits need to be reserved.
  • the downlink subframe n is a downlink subframe in the TDD frame structure #0 and
  • the two uplink subframes that can be scheduled by the downlink subframe n are not set to the downlink subframe by the frame structure configuration DCI, determine that the index indication property of the downlink subframe n is C2;
  • the downlink subframe n is a downlink subframe in the TDD frame structure ttO and if the downlink subframe n can be scheduled in two uplink subframes 1 is configured as a downlink subframe by the frame structure configuration DCI, and determining that the index indication property of the downlink subframe n is C1
  • the method further includes the steps of: - transmitting an ACK/NACK in an n+k subframe, the number of bits and mapping of the ACK/NACK being by assuming the ACK/NACK All possible downlink subframes indicated are sent with PDSCH, where k is obtained by interpreting the index indication bits.
  • the system configures the current frame structure by configuring the DCI display through the frame structure.
  • the above aspect distinguishes the downlink subframe in the TDD frame structure #0, a part of the index indication property is Cl, and the other part is C2. Only for the part of the subframe of C2, the UE needs to determine the number of ACK/NACK bits and the mapping method according to the maximum possibility. The number of reserved ACK/NACK bits is saved.
  • the system configures the current frame structure of the UE by using a frame structure configuration DCI, for example, 1, and the subframe ⁇ 4 ⁇ in the uplink subframe set ⁇ 4, 7 ⁇ that can be scheduled by subframe 0 is already clear. It is downlink, so subframe 0 can only schedule 1 downlink subframe, and it is determined that the index indication property belongs to Cl. Subframe 5 also belongs to the same scenario.
  • the configuration frame structure implicit by the reference frame structure for example, setting the frame structure can jump between #3/4/5/0 And the uplink reference frame structure #0 (ie, the HARQ timing relationship of the PUSCH complies with the frame structure #0), then the subframe ⁇ 4 ⁇ in the uplink subframe set ⁇ 4, 7 ⁇ that can be scheduled by the subframe 0 has been explicitly determined to be the downlink.
  • the subframe ⁇ 9 ⁇ in the uplink subframe set ⁇ 9, 2 ⁇ that can be scheduled by the subframe 5 is also explicitly downlink, so it is determined that the index indication property of the subframe 0/5 is Cl.
  • the downlink subframe n is a downlink subframe in the TDD frame structure ttO, determining that the index indication property of the downlink subframe n is C3.
  • the uplink subframe n+k can only be scheduled by the downlink subframe n, and the uplink subframe n+k can carry at most 1 in a frame structure.
  • ACK/NACK of the downlink subframe and if the state represented by the index indication bit in the DCI transmitted on the decoded downlink subframe n conforms to a specific one state, the parameter ko is obtained, and the uplink subframe 8/9 is matched.
  • the above conditions are therefore only required to be indicated by one of the four states that the two index indication bits can indicate.
  • the uplink subframe n+k can only be scheduled by the downlink subframe n, and the uplink subframe n+k can be carried in a frame structure at most ACK/NACK of one downlink subframe, and if the state represented by the index indication bit in the DCI transmitted on the decoded downlink subframe n matches one of three states other than the one state, then One of three DAI values is obtained.
  • the uplink subframe 3/4 meets the above conditions.
  • the ACK/NACK carried by the subframe 4 can indicate at most 2 downlink subframes. Therefore, the three DAI values can fully satisfy the requirement.
  • the DAI value can be selected. 1 2 4], where 4 indicates no downlink subframe transmission; and for subframe 3, the ACK/NACK carried by the subframe 3 can indicate up to 4 downlink subframes, so the three DAI values can only be full.
  • Most of the needs can be solved by the above-mentioned reserved maximum ACK/NACK bit number, or by implementing related methods, such as avoiding a DAI value during scheduling.
  • the uplink subframe n+k can be simultaneously scheduled by the downlink subframe n1 and the downlink subframe ⁇ 2, the feature is:
  • the target DAI value indicated by the DCI is a P value in the four DAI values, and the P type value and the index indication bit One-to-one correspondence of P states;
  • the target DAI value indicated by the DCI is a 4-P type value other than the P value of the four DAI values
  • the 4-P type value corresponds to the 4-P state of the index indication bit.
  • P is an integer greater than 0 and less than 4.
  • the two index indication bits represent the four types of index indication states.
  • Table 5 is an embodiment of the foregoing method. For example, by interpreting the three index indication states in the downlink subframe 0, the current scheduled subframe 4 and the three DAI values are obtained. Obtaining the current scheduled subframe 7 and 1 DAI value by interpreting another index indication state in the downlink subframe 0; similarly, obtaining the current scheduled subframe 7 by interpreting the three index indication states in the downlink subframe 1 And 3 DAI values, which are obtained by interpreting another index indication state in the downlink subframe 1 to obtain the current scheduling.
  • the method further includes the following steps:
  • the index occupied by the DAI indicates the number of states represented by 3 1 3 1 1 3 1 3 bits
  • the step of determining the nature of the index indication can be implemented by various methods. For example, it can be obtained by real-time operation according to the above scheme, or the index indication property can be calculated and saved according to the above rules in advance, and indexed by searching for the saved data when needed later. Indicative nature.
  • the present invention discloses a method for performing subframe scheduling in a TDD network side device, including:
  • the DAI information is mapped to two index indication bits
  • the ULI information is mapped to two index indication bits
  • the index indication property of the downlink subframe n is C3, the ULI/DAI synthesis information is mapped into two index indication bits;
  • the current uplink reference frame structure is TDD frame structure #0.
  • the uplink scheduling method may be implemented by a network side device, such as a base station, a micro cell, a relay, a home base station, and the like.
  • the uplink scheduling method may be completed by a user equipment, such as a mobile phone, a data card, or the like.
  • the downlink subframe n does not belong to a downlink subframe in the TDD frame structure ttO, it is determined that the index indication property of the downlink subframe n is Cl.
  • the downlink subframe n is a downlink subframe in the TDD frame structure #0, it is determined that the index indication property of the downlink subframe n is C2.
  • the method further includes the following steps:
  • the number and mapping of the ACK/NACK being obtained by assuming that all possible downlink subframes indicated by the ACK/NACK are transmitted with a PDSCH, where k passes the index indication bit Instructions.
  • the downlink subframe n is a downlink subframe in the TDD frame structure #0 and if the downlink subframe n can be scheduled, two uplink subframes are DCI is not set to frame by frame structure configuration a row subframe, determining that an index indication property of the downlink subframe n is C2;
  • the downlink subframe n is a downlink subframe in the TDD frame structure #0 and if the downlink subframe n can be scheduled in two uplink subframes
  • One of the DCMs that have been configured by the frame structure is configured as a downlink subframe, and the index indicating property of the downlink subframe n is determined to be C1.
  • the method further includes the following steps:
  • the feature is:
  • the downlink subframe n is the downlink subframe n1, and the P type value and the index indication bit P State - corresponding;
  • the downlink subframe n is the downlink subframe n2, and the 4 The value of the -P type corresponds to the 4-P state of the index indication bit.
  • the uplink subframe n+k can only be scheduled by the downlink subframe n, the uplink subframe n+k can be carried in a frame structure at most
  • the ACK/NACK of one downlink subframe is a specific one of the four states indicated by the two index indication bits in the DCI transmitted on the downlink subframe n.
  • the uplink subframe n+k can only be scheduled by the downlink subframe n
  • the uplink subframe n+k can be carried in a frame structure at most ACK/NACK of a downlink subframe greater than one, and three states other than the one of the four states represented by the two index indication bits in the DCI transmitted on the downlink subframe n indicate DAI value.
  • the step of determining the nature of the index indication can be implemented by various methods, for example, by real-time operation according to the above scheme, or by calculating an index indication according to the above rules in advance.
  • the properties are saved and the indexing properties are obtained by looking up the saved data when needed later.
  • the method further includes the following steps:
  • the invention also discloses a user equipment, comprising:
  • the first module is configured to determine that an index indication property of the downlink subframe n is one of C1, C2, and C3;
  • a second module configured to receive DCI in the downlink subframe n
  • the third module is configured to: according to the index indication property of the downlink subframe n, perform an interpretation of the index indication bit by performing a step in the following steps:
  • the DAI information is obtained by interpreting the index indication bit
  • the ULI information is obtained by interpreting the index indication bit
  • the ULI/DAI comprehensive information is obtained by interpreting the index indication bit;
  • the current uplink reference frame structure is TDD frame structure #0.
  • the downlink subframe n is a downlink subframe in the TDD frame structure #0:
  • the two uplink subframes that can be scheduled by the downlink subframe n are not set to the downlink subframe by the frame structure configuration DCI, determine that the index indication property of the downlink subframe n is C2; if the downlink subframe n can One of the two uplink subframes that have been scheduled has been configured as a downlink subframe by the frame structure configuration DCI, and the index indication property of the downlink subframe n is determined to be C1.
  • the downlink subframe n is a downlink subframe in the TDD frame structure #0, that is, n is any one of 0, 1, 5, 6, determining an index indication property of the downlink subframe n For C2.
  • the foregoing apparatus includes a fourth module: configured to send an ACK/NACK in an n+k subframe, where the number and mapping of the ACK/NACK are all possible downlinks by assuming the ACK/NACK indication Frames are sent with PDSCH.
  • the invention also discloses a network side device, comprising:
  • the first module is configured to determine that the index indication property of the downlink subframe ⁇ is one of C1, C2, and C3;
  • the second module is configured to set an index indication bit by performing a step in the following steps according to the index indication property of the downlink subframe n:
  • the DAI information is mapped to an index indication bit
  • the ULI information is mapped to an index indication bit
  • the index indication property of the downlink subframe n is C3, the ULI/DAI synthesis information is mapped to an index indication bit;
  • the third module is configured to send, in the downlink subframe n, a DCI that includes the index indication bit, where the current uplink reference frame structure is a TDD frame structure #0.
  • the foregoing apparatus further includes a fourth module: configured to receive an ACK/NACK in an n+k subframe, where the number and mapping of the ACK/NACK are all possible downlinks indicated by the ACK/NACK Subframes are sent with PDSCH.
  • the invention solves the problem that the frame structure of the hopping in the TDD elMTA scene includes the frame structure #0 or the reference uplink structure is the frame structure ftO, and the ULI and DAI bits in the uplink scheduling conflict, and the maximum and existing System compatibility.
  • FIG. 1 shows a flow diagram of a method for use in a user equipment in accordance with one embodiment of the present invention
  • FIG. 2 shows a block diagram of a structure for a processing device in a UE, in accordance with one embodiment of the present invention
  • FIG. 3 is a block diagram showing the structure of a processing device used in a base station according to an embodiment of the present invention.
  • Embodiment 1 describes a method flow for use in a user equipment.
  • the user equipment determines the index indication property CI, C2, C3 of the subframe n, and different subframes may have different index indication properties, and may also have the same index indication property; in step C32, the user equipment according to Receiving the uplink scheduling DCI of the user sent by the subframe n; in step C33, the user equipment interprets the index indication bit information according to the index indication property of the subframe n, which is DAI, ULI or both DAI and ULI; in step C34, the user The device responds to the bit information according to the interpreted index and responds on the corresponding uplink subframe.
  • the index indication information is different, and the response manner is different: if the index indication bit is ULI, the user equipment responds in the uplink subframe indicated by the user equipment, and if the index indication bit is DAI, the user equipment responds according to the DAI indication on the fixed subframe. ACK/NACK assignment. If the index indication bit includes both DAI and ULI, the user equipment assigns an ACK/NACK to the feedback according to the indicated DAI on the indicated uplink subframe. In step C34, if the DAI information is missing, the UE determines the ACK/NACK bit number and mapping according to the maximum possible DAI value.
  • Embodiment 2 is a processing device in a UE, including a judging module 201, a receiving module 202, an interpreting module 203, and a transmitting module 204, as shown by the processing device 200 in FIG.
  • the sending module 204 is an optional module and is identified by a dotted line.
  • the determining module 201 is configured to determine whether the index indicating property of the downlink subframe n is C1 or C2 or C3;
  • the receiving module 202 is configured to receive, in the downlink subframe n, a DCI interpretation module 203 that includes an index indication bit: used to interpret the index indication bit, if the index indication property of the downlink subframe n is C1 (eg, n is 0 or 5) Interpreting 2 index indication bits to acquire DAI; if the index indication property of the downlink subframe n is C3 (for example, n is 1 or 6), interpreting 1 index indication bit acquisition part M1 information, interpreting another index Indication bit acquisition section
  • the sending module 204 is configured to send an ACK/NACK on a subframe in which the ULI indication (the index indication property is C2) or the default (the index indication property is C1), and if the DAI is absent, the maximum is performed.
  • the number of ACK/NACK bits may be reserved.
  • Embodiment 3 is a processing device in a base station device, including a judging module 301, a setting module 302, a transmitting module 303, and a receiving module 304, as shown by the processing device 300 in FIG.
  • the receiving module 304 is an optional module and is identified by a dotted line.
  • the determining module 301 is configured to determine an index indicating property C1 or C2 of the downlink subframe n.
  • the setting module 302 is configured to set an index indicating bit, if the index indicating property of the downlink subframe n is C1 (eg, n is 0 or 5) Mapping the DAI information to 2 bits as an index indication bit; if the index indication property of the downlink subframe n is C2 (for example, n is 1 or 6), mapping the ULI information to 2 bits as an index indication bit
  • the sending module 303 is configured to send, in the downlink subframe n, a DCI that includes the index indication bit
  • the receiving module 304 is configured to receive an ACK/NACK for the DCI, and if the DAI is absent, interpret according to the maximum possible reserved ACK/NACK bit.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention porte sur un procédé de planification de sous-trame de liaison montante dans un système de communication mobile duplex à répartition dans le temps (TDD). Dans un mode de réalisation, le procédé comprend : la réception d'informations de commande de liaison descendante (DCI) pour la planification d'une sous-trame de liaison montante, une indication d'indice à 2 bits que le DCI comprend pouvant être utilisée dans une sous-trame de liaison descendante de structure de trame TDD-LTE #0 soit pour indiquer un indice d'affectation de liaison descendante (DAI), soit pour indiquer un indice de liaison montante, et pour indiquer simultanément des informations ULI et DAI. L'utilisation de la solution technique selon l'invention permet de résoudre le problème d'un conflit entre des bits ULI et DAI dans la planification de liaison montante lorsqu'une structure de trame de saut dans un schéma de gestion d'interférences et d'adaptation de trafic améliorées (eIMTA) comporte la structure de trame #0 ou une structure de trame de liaison montante de référence est la structure de trame #0, la compatibilité avec les systèmes existants étant conservée au maximum.
PCT/CN2014/000387 2013-04-10 2014-04-10 Procédé et système de planification dans un système de communication mobile WO2014166301A1 (fr)

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WO2017193268A1 (fr) * 2016-05-09 2017-11-16 华为技术有限公司 Procédé de transmission de données de liaison montante, dispositif de terminal et dispositif de réseau
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WO2012150793A2 (fr) * 2011-05-03 2012-11-08 엘지전자 주식회사 Méthode d'émission/réception d'informations de commande de liaison descendante dans un système de communication sans fil et dispositif associé

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CN111224755A (zh) * 2015-03-30 2020-06-02 华为技术有限公司 控制信息的发送方法、用户设备和基站
US11240813B2 (en) 2015-03-30 2022-02-01 Huawei Technologies Co., Ltd. Method for sending control information, user equipment, and base station

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