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WO2011082571A1 - Procédé et station de base pour l'allocation de couches - Google Patents

Procédé et station de base pour l'allocation de couches Download PDF

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Publication number
WO2011082571A1
WO2011082571A1 PCT/CN2010/074632 CN2010074632W WO2011082571A1 WO 2011082571 A1 WO2011082571 A1 WO 2011082571A1 CN 2010074632 W CN2010074632 W CN 2010074632W WO 2011082571 A1 WO2011082571 A1 WO 2011082571A1
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WO
WIPO (PCT)
Prior art keywords
layers
group
base station
transmitted
groups
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Ceased
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PCT/CN2010/074632
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English (en)
Chinese (zh)
Inventor
戴博
李儒岳
孙云锋
郁光辉
张峻峰
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ZTE Corp
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ZTE Corp
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Publication of WO2011082571A1 publication Critical patent/WO2011082571A1/fr
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Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a layer allocation method and a base station.
  • spatial multiplexing may be used to increase the transmission rate, that is, different antenna positions on the same time-frequency resource at the transmitting end.
  • Different data is transmitted, and multiple antennas are also used at the receiving end (UE).
  • All antenna resources can be allocated to the same user in the case of a single user.
  • This transmission form is called SU-MIMO (single-user multiple-input multiple-output).
  • resources of different antenna spaces can be allocated to different users in the case of multiple users.
  • This transmission form is called MU-MIMO (Multi-User MIMO).
  • the eNB If the transmission system is to support both single-user MIMO and multi-user MIMO, it is necessary for the eNB to provide the UE with data in both transmission modes with control signaling.
  • the UE needs to know the rank (Rank) used by the eNB for the UE transmission in both transmission modes.
  • the rank used, and in multi-user transmission the number of layers used for one user transmission is less than the total number of layers of the transmission.
  • the eNB needs to inform the UE of different data in different transmission modes.
  • the transmission mode of the MIMO has been determined by using a Demodulation Reference Signal (DMRS) for demodulation.
  • DMRS Demodulation Reference Signal
  • the location of the pilot is obtained so that the channel and interference estimates can be made on the pilot.
  • the total number of layers of different transmissions has different pilot patterns. For example, in LTE version number 10, there are initially three different patterns (DMRS Pattern).
  • a pattern (DMRS pattern 1 ), as shown in Figure 1 (a), uses a second pattern (DMRS pattern 2 ) when the total number of layers or rank is 3 to 4, as shown in Figure 1 (b)
  • the third pattern (DMRS pattern 3) is used when the total number of layers or rank is 5 to 8, as shown in Figure 1 (c).
  • DMRS pattern 1 uses a second pattern (DMRS pattern 2 ) when the total number of layers or rank is 3 to 4, as shown in Figure 1 (b)
  • the third pattern (DMRS pattern 3) is used when the total number of layers or rank is 5 to 8, as shown in Figure 1 (c).
  • DMRS pattern 1 uses a second pattern (DMRS pattern 2 ) when the total number of layers or rank is 3 to 4, as shown in Figure 1 (b)
  • the third pattern (DMRS pattern 3) is used when the total number of layers or rank is 5 to 8, as shown in Figure 1 (c).
  • DMRS pattern 3 uses a second pattern (DMRS pattern 2 ) when the total number of layers or rank is
  • version number 10 of LTE requires a new layer allocation method to support DMRS-based MIMO multi-user transmission.
  • version number 10 of LTE requires a new layer allocation method to support DMRS-based MIMO multi-user transmission.
  • version number 10 of LTE requires a new layer allocation method to support DMRS-based MIMO multi-user transmission.
  • the technical problem to be solved by the present invention is to provide a layer allocation method and a base station, which provide the possibility of two-layer transmission of a user in multi-user transmission.
  • the present invention provides a layer allocation method, including: dividing the total number of layers currently transmitted into several groups, each group corresponding to one layer or two layers, and corresponding layers of each group are different from each other, when the target user When the data is transmitted on two layers, a group of the corresponding two layers in the plurality of groups is allocated to the target user.
  • the foregoing method may further have the following feature: when data of the target user is transmitted on two layers, the user-specific reference signals corresponding to the two layers are transmitted in the same physical resource by using code division multiplexing; Alternatively, the user-specific reference signals corresponding to the two layers are transmitted in different frequency divisions by using frequency division multiplexing.
  • the above method may further have the following characteristics: the index values corresponding to the two layers in the two-layer group are respectively n and n+1, where n is an even number; or, m and m+2, m is 0. , 1, 4,
  • the foregoing method may further have the following characteristics: when the total number of layers transmitted is 3, the index values of the two layers corresponding to the two layers are 0 and 1; or, 0 and 2.
  • the foregoing method may further have the following feature: when the total number of layers transmitted is 4 or 5, or the pilot pattern is the second pattern, the index values of the two layers corresponding to the two layers are 0. And 1, 2 and 3; or, 0 and 2, 1 and 3.
  • the foregoing method may further have the following characteristics: when the total number of layers transmitted is 6 or 7, the index values of the two layers corresponding to the two layers correspond to 0, 1, 2, and 3, 4, and 5, Or, 0 and 1, 2 and 3, 4 and 6; or, 0 and 2, 1 and 3, 4 and 6, or, 0 and 2, 1 and 3, 4 and 5.
  • the above method may also have the following features: when the total number of layers transmitted is 8, or the pilot pattern is the third pattern, the index values of the two layers corresponding to the two layers are 0 and 1 respectively.
  • the present invention further provides a base station, where the base station is configured to divide the total number of layers currently transmitted into several groups, each group corresponding to one layer or two layers, and corresponding layers of each group are different from each other, when the data of the target user is in two When transmitting on the layer, a group of the corresponding two layers in the plurality of groups is allocated to the target user.
  • the foregoing base station may further have the following features: the base station is configured to: when the data of the target user is transmitted on two layers, transmit the two layers corresponding to the same physical resource by using code division multiplexing User-specific reference signals; or, frequency-multiplexed transmission of the two-layer corresponding user-specific reference signals on different physical resources.
  • the foregoing base station may further have the following features, the base station is configured to: divide each group according to the following manner: the index values corresponding to the two layers in the group corresponding to the two layers are respectively n and n+1, or m And m+2, where n is an even number and m is 0, 1, 4, 5.
  • the foregoing base station may further have the following features: the base station is configured to: divide each group as follows: When the total number of layers to be transmitted is 3, the index corresponding to the two layers of the two-layer group is 0 and 1; or, 0 and 2.
  • the base station is configured to: divide each group as follows: when the total number of layers to be transmitted is 4 or 5, or when the pilot pattern is the second pattern, corresponding to two The index values of the two layers in each layer of the layer are 0 and 1; 2 and 3; or 0 and 2, 1 and 3.
  • the foregoing base station may further have the following features, the base station is configured to: divide each group as follows: When the total number of layers transmitted is 6 or 7, the index values of the two layers corresponding to the two layers correspond to 0 and 1, 2 and 3, 4 and 5, or, 0 and 1, 2 and 3, 4 And 6; or, 0 and 2, 1 and 3, 4 and 6, or, 0 and 2, 1 and 3, 4 and 5.
  • the foregoing base station may further have the following features, the base station is configured to: divide each group as follows: when the total number of layers to be transmitted is 8, or the pilot pattern is the third pattern, corresponding to the two layers
  • the index values of the two layers in each group are 0 and 1, 2 and 3, 4 and 5, 6 and 7, or 0 and 1, 2 and 3, 4 and 6, 5 and 7, or 0 and 2 , 1 and 3, 4 and 6, 5 and 7, or, 0 and 2, 1 and 3, 4 and 5, 6 and 7.
  • the present invention provides a two-layer allocation method and a base station, which provides the possibility of two-layer transmission of a user in multi-user transmission, and optimizes signaling by ensuring system performance by limiting the allocation of two-layer users. s expenses.
  • Figure 1 (a) is the total number of layers transmitted or the pilot pattern when the rank is 1 to 2
  • Figure 1 (b) is the total number of layers transmitted or the pilot pattern when the rank is 3 to 4.
  • Figure 1 (c) is the pilot pattern when the total number of layers transmitted or rank is 5 to 8.
  • the preferred embodiment of the present invention contemplates the problem that the demodulation pilot based MIMO multi-user transmission is not supported in the LTE version number 10 in the related art, and the present invention provides a two-layer allocation method, which provides The possibility of a user's two-layer transmission during multi-user transmission, through the limitation of the distribution layer, maximizes the signaling overhead while ensuring system performance.
  • the pilot pattern corresponding to one layer and two layers is the first pilot pattern, and the three layers and four layers correspond to The pilot pattern is a second pilot pattern, and the pilot patterns of the five, six, seven, and eight layers are the third pilot patterns.
  • the two-layer allocation method provided by the present invention includes: the total number of layers or ranks of the current transmission is M, and M is divided into k groups, each group corresponding to one layer or two layers, and corresponding layers of each group are different from each other, when the target user When the data is transmitted on two layers, a group of the corresponding two layers in the k group is allocated to the target user, and the data of the target user is transmitted on the two layers corresponding to the allocated group.
  • the two-layer corresponding user-specific reference signals are transmitted on the same physical resource by using code division multiplexing.
  • the data is data carried by a physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • the index corresponding to the two layers of the two-layer group is n and n+1, where n is an even number.
  • the index corresponding to the two layers of the two layers corresponds to 0 and 1.
  • the total number of layers (rank) of the transmission is 4, or the pilot pattern is the second pattern, the index values of the two layers corresponding to the two layers correspond to 0 and 1, 2 and 3.
  • the index values of the two layers corresponding to the two layers correspond to 0 and 1, 2 and 3.
  • the index corresponding to the two layers of the two layers corresponds to 0 and 1, 2 and 3, 4 and 5, or two The index of the two layers of the layer corresponds to 0 and 1, or 2 and 3, or 4 and 6;
  • the total number of layers (rank) is 8, or the pilot pattern is In the case of the third pattern, the index corresponding to the two layers of the two layers corresponds to 0 and 1, 2 and 3, 4 and 5, 6 and 7, or two layers corresponding to the two layers corresponding to the two layers.
  • Index values are 0 and 1, 2 and 3, 4 and 6, 5 and 7;
  • the user-specific reference signals corresponding to the two layers are transmitted in different frequency divisions by using frequency division multiplexing.
  • the index corresponding to the two layers of the two-layer group is m and m+2 , and m is 0, 1, 4, 5.
  • the index values of the two layers are 0 and 2; further, the total number of layers (rank) is 4, or the pilot pattern
  • the index corresponding to the two layers of the two layers corresponds to 0 and 2, 1 and 3; further, when the total number of layers (rank) is 5, corresponding to two
  • the index values of the two layers of the layer correspond to 0 and 2, 1 and 3; further, when the total number of layers (rank) is 6 or 7, the two layers corresponding to the two layers correspond to the two layers.
  • the index values are 0 and 2, 1 and 3, 4 and 6, or, the two groups corresponding to the two layers have corresponding index values of 0 and 2, 1 and 3, 4 and 5; further, the total transmission
  • the index values of the two layers corresponding to the two layers are 0 and 2, 1 and 3, 4 and 6, 5 and 7.
  • the two groups corresponding to the two layers have index values corresponding to 0 and 2, 1 and 3, 4 and 5, 6 and 7.
  • the layer index corresponds to an antenna port; for example, layer index 0 to layer index 7 corresponds to antenna port 7 to antenna port 13.
  • the two layers are a group including two layers in the above-mentioned packet, that is, the two layers are a combination of layer indexes given in the following method.
  • Method 1 When a user's data is transmitted on two layers, the two layers of corresponding UE-specific reference signals are code-multiplexed on the same physical resource. Mode transfer.
  • the index corresponding to the two layers is n and n+1, where n is an even number.
  • the index values of the two layers are 0 and 1; when the total number of layers (rank) is 4 or 5, or the pilot pattern is the second pattern
  • the index values of the two layers are 0 and 1, 2 and 3; when the total number of layers (rank) is 6 or 7, the index values of the two layers are 0 and 1, 2 and 3, 4, and 5; when the total number of layers (rank) is 8, or the pilot pattern is the third pattern, the index values of the two layers are 0 and 1, 2, and 3, 4 and 5, 6 and 7.
  • Method 3 When the total number of layers (rank) of the transmission is 3, the index values of the two layers are 0 and 1; when the total number of layers (rank) is 4 or 5, or the pilot pattern is the second For the pattern, the index values of the two layers are 0 and 1, 2 and 3; when the total number of layers (rank) is 6 or 7, the index values of the two layers are 0 and 1, 2 and 3, 4 and 6; when the total number of layers (rank) is 8, or the pilot pattern is the third pattern, the index values of the two layers are 0 and 1, 2 and 3, 4 and 6, 5 and 7.
  • Method 4 When a user's data is transmitted on two layers, the user-specific reference signals corresponding to the two layers are transmitted in different frequency divisions by using frequency division multiplexing.
  • the index corresponding to the two layers in the method 5 is m and m+2, where m can be 0, 1, 4, 5.
  • the index values of the two layers are 0 and 2; when the total number of layers (rank) is 4 or 5, or the pilot pattern is the second pattern
  • the two layers correspond to index values of 0 and 2, 1 and 3; when the total number of layers (rank) is 6 or 7, the index values of the two layers are 0 and 2, 1 and 3, 4, and 6; when the total number of layers (rank) is 8, or the pilot pattern is the third pattern, the index values of the two layers are 0 and 2, 1 and 3, 4, and 6 , 5 and 7.
  • Method 6 When the total number of layers (rank) of the transmission is 3, the index values of the two layers are 0 and 2; when the total number of layers (rank) is 4 or 5, or the pilot pattern is the second For the pattern, the two layers have corresponding index values of 0 and 2, 1 and 3; when the total number of layers (rank) is 6 or 7, the index values of the two layers are 0 and 2, 1 and 3, 4 and 5; when the total number of layers (rank) is 8, or the pilot pattern is the third pattern, the index values of the two layers are 0 and 2, 1 and 3, 4 And 5, 6 and 7.
  • the present invention also provides a base station, which is configured to divide a total number of layers currently transmitted. For each group, each group corresponds to one layer or two layers, and the corresponding layers of each group are different from each other. When the data of the target user is transmitted on two layers, a group corresponding to the two layers of the several groups is allocated to the target. user.
  • the base station is configured to transmit the two-layer corresponding user-specific reference signals on the same physical resource when the data of the target user is transmitted on two layers; or, in different physical
  • the resource-specific frequency-multiplexed mode transmits the two-layer corresponding user-specific reference signals.
  • the present invention provides the possibility of two-layer transmission of a user in multi-user transmission.
  • the signaling overhead is optimized to the greatest extent under the premise of ensuring system performance.
  • the present invention provides a layer allocation method and a base station, and provides a technical solution for realizing a two-layer transmission of a user when transmitting by multiple users. By limiting the allocation of two layers of users, the maximum optimization is performed under the premise of ensuring system performance. The overhead of signaling.

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

Abstract

La présente invention se rapporte à un procédé d'allocation de couches par deux, le procédé consistant : à diviser le nombre total de couches d'une transmission en cours en un certain nombre de groupes, chaque groupe correspondant à une ou deux couches, et la couche correspondant à chaque groupe étant différente des autres ; à allouer un groupe correspondant à deux couches dans lesdits certains groupes à un utilisateur cible, quand les données de l'utilisateur cible sont transmises sur deux couches. La présente invention se rapporte également à une station de base. La présente invention permet de convertir la transmission à deux couches d'un utilisateur unique en une transmission multi-utilisateur. D'autre part, en plus de garantir les performances du système, la limite d'allocation imposée à des utilisateurs utilisant une transmission à deux couches permet d'optimiser considérablement le surdébit de signalisation.
PCT/CN2010/074632 2010-01-07 2010-06-28 Procédé et station de base pour l'allocation de couches Ceased WO2011082571A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010003606.2A CN101795189B (zh) 2010-01-07 2010-01-07 一种两层分配方法和基站
CN201010003606.2 2010-01-07

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Publication number Priority date Publication date Assignee Title
CN103069763A (zh) * 2010-08-18 2013-04-24 Lg电子株式会社 用于在无线接入系统中传输上行数据的方法和装置
CN107040345B (zh) 2016-02-03 2020-12-18 华为技术有限公司 传输导频信号的方法和装置
CN112055995B (zh) 2018-03-13 2024-06-21 中兴通讯股份有限公司 基于候选资源或候选资源组的传输

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CN101370192A (zh) * 2007-08-15 2009-02-18 中兴通讯股份有限公司 一种长期演进系统中解调参考信号模式的高层通知方法

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CN101370192A (zh) * 2007-08-15 2009-02-18 中兴通讯股份有限公司 一种长期演进系统中解调参考信号模式的高层通知方法

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CN101795189A (zh) 2010-08-04
CN101795189B (zh) 2015-09-16

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