WO2009006857A1 - Système et procédé indicateur de commande de format de transport de canal - Google Patents

Système et procédé indicateur de commande de format de transport de canal Download PDF

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Publication number
WO2009006857A1
WO2009006857A1 PCT/CN2008/071628 CN2008071628W WO2009006857A1 WO 2009006857 A1 WO2009006857 A1 WO 2009006857A1 CN 2008071628 W CN2008071628 W CN 2008071628W WO 2009006857 A1 WO2009006857 A1 WO 2009006857A1
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WO
WIPO (PCT)
Prior art keywords
value
base station
wireless communication
unit
terminal
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PCT/CN2008/071628
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English (en)
Chinese (zh)
Inventor
Guojun Xiao
Shiqiang Suo
Hai Tang
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Da Tang Mobile Communications Equipment Co., Ltd
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Application filed by Da Tang Mobile Communications Equipment Co., Ltd filed Critical Da Tang Mobile Communications Equipment Co., Ltd
Publication of WO2009006857A1 publication Critical patent/WO2009006857A1/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
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • Embodiments of the present invention relate to a signaling format indication technology, and in particular, to a method and system for indicating a control channel transmission format. Background technique
  • control channel since the control channel adopts a fixed transmission format, in order to ensure the quality of the control channel and enable the wireless communication system to operate normally, various integrated factors need to be considered when designing the control channel, which is often based on The worst case is designed to cause waste of channel resources.
  • the designed control channel must guarantee the coverage of the Node B signal of the base station, so that the cell edge users whose base station signal fading is also correctly detected.
  • the transmission parameters such as the preset modulation mode, coding mode, and transmission power must adopt a lower modulation mode, a lower channel coding rate, or Higher transmit power. If the total amount of control signaling is small, such channel resource loss can be neglected.
  • the number of control signaling is greatly increased, and the control channels are still fixed. Transmission format transmission control signaling will inevitably lead to serious loss of channel resources, and transmission efficiency is low. It is necessary to adopt multiple transmission formats for the control channel to improve transmission efficiency.
  • the design approach employed in the design of wireless communication systems also results in the need for multiple transmission formats for the control channel.
  • the transmission parameters of the wireless communication system change to adjust the control channel, or the link adaptation technology adaptively adjusts the parameters of the signal transmission to match the control channel, since both of these situations will make the required
  • the control channel resources are constantly changing. Therefore, multiple transmission formats need to be adopted for the control channel, and the resource occupancy of the control channel is adjusted accordingly. Integrity, otherwise it will lead to waste of channel resources.
  • the hardware processing capability of devices in wireless communication systems is getting stronger and stronger, and it is also an irresistible trend to adopt multiple transmission formats for control channels.
  • the prior art uses multiple transmission formats for the control channel to match the control channel, and uses multiple transmission formats for the control channel.
  • the transmission control signaling is compared with the above-mentioned control channel using a fixed transmission format, which can reduce the occupation of channel resources. .
  • the transmission format of the control channel is indicated by using a Control Channel Format Indicator (CCFI).
  • CCFI Control Channel Format Indicator
  • the prior art designs control channels for different wireless communication systems, and it is necessary to preset CCFI corresponding to the designed control channel. That is to say, the prior art cannot pre-set the CCFI corresponding to the transmission characteristics of different wireless communication systems, and in particular cannot be applied to complex wireless communication systems.
  • the main purpose of the embodiments of the present invention is to provide a method for indicating a control channel transmission format, which is applicable to various wireless communication systems that use multiple transmission format control channels, and is particularly suitable for a complex wireless communication system, which is simple. Efficiently implement the transmission format information of the control channel
  • Another object of the embodiments of the present invention is to provide an indication system for controlling a channel transmission format, which can implement a transmission format information indication of a control channel simply and efficiently.
  • the method also includes:
  • n is the specific transmission format information of the control channel indicated by the CCFI
  • D is information carried by the CCFI CCFI
  • the Node B After the base station Node B establishes a connection with the terminal, the Node B encapsulates the control signaling into the subframe according to the n value and sends the control signaling to the terminal, and simultaneously sends the eOT to the terminal through the CCFI channel;
  • the terminal After receiving the subframe and the eOT , the terminal extracts the control signaling according to the n value according to the n value, and according to the control signaling, according to the sum and the learned n value.
  • the indicated resource location performs data reading; wherein it is obtained through a system message.
  • the value of the n is specifically a value used to determine a resource location occupied by the control signaling encapsulated in the subframe.
  • step C the terminal specifically learns the resource location occupied by the control signaling according to the value of n.
  • the n value is a number of orthogonal frequency division multiplexing OFDM symbols used to encapsulate the control signaling in the subframe when the wireless communication system is a long term evolution LTE system of a 3G radio interface technology;
  • step C the terminal further learns the location of the OFDM symbol occupied by the control signaling according to the value of n.
  • the establishing the mapping relationship in step A determines that the value of n is: according to the relationship between the ⁇ and the relationship, setting a configuration correspondence table to determine an n value, and storing the configuration correspondence table on the Node B side And the terminal side.
  • the Node B and the terminal transmitting and receiving parties determine when establishing a connection.
  • the method includes: a ratio of uplink and downlink time slots of the current wireless communication system, or a transmission bandwidth of the current wireless communication system, or special configuration information of the current wireless communication system.
  • An indication system for controlling a channel transmission format comprising: a base station side setting unit, a base station side extraction unit, a base station side mapping establishment unit, a base station side transmission unit, a terminal side receiving unit, and a terminal side extraction unit;
  • a base station side setting unit configured to preset CCFI, and send the signal to the base station side mapping establishment unit
  • a base station side extracting unit configured to extract a transmission parameter of the wireless communication system according to a transmission characteristic of the current wireless communication system, and send the transmission parameter to the base station side mapping establishment unit
  • a base station side sending unit configured to send, to the terminal side receiving unit, a subframe including control signaling and CCFI encapsulated according to an n value;
  • a terminal side receiving unit configured to acquire the subframe and the eOT , and obtain the ⁇ by using a system message, and send the same to the terminal side extracting unit;
  • the terminal side extracting unit is configured to learn the n value according to the acquired eOT , and extract control signaling from the subframe according to the n value.
  • the base station side mapping establishing unit includes a setting module, configured to set the established mapping relationship to a configuration correspondence table, and determine an n value by using the relationship between the eOT and the foregoing; correspondingly, the base station The side mapping establishing unit is further configured to send the configuration correspondence table to the terminal side receiving unit.
  • the system further includes: a base station side storage unit, and a terminal side storage unit;
  • the base station side mapping establishing unit is further configured to send the configuration correspondence table to the base station side storage unit; correspondingly, the base station side storage unit is configured to receive and store the configuration corresponding table;
  • the terminal side receiving unit is further configured to send the configuration correspondence table to the terminal side storage unit, and correspondingly, the terminal side storage unit is configured to receive and store the configuration correspondence table, and send the configuration to the terminal side. And extracting the unit; the terminal side extracting unit further knowing the n value according to the configuration correspondence table, and extracting control signaling from the subframe according to the n value.
  • the prior art relies only on the preset CCFI, and different CCFIs need to be designed for different wireless communication systems. However, the embodiments of the present invention are different from the prior art, and are applicable to different wireless communication systems that use multiple transmission format control channels. General CCFI mapping method.
  • an optimal balance between efficiency and processing complexity is achieved.
  • a CCFI of a very long bit needs to be preset.
  • the embodiment of the present invention is different from the prior art in that a common CCFI mapping mode can be used to meet different wireless requirements.
  • the transmission characteristics of the communication system thus reduce the bits of the preset CCFI, thereby reducing the resource occupation of the control channel, the data transmitted is large, and the efficiency of the operation of the wireless communication system is high.
  • FIG. 1 is a schematic structural diagram of a first type of frame structure supported by an LTE wireless communication system
  • FIG. 2 is a schematic structural diagram of a second type of frame structure supported by an LTE wireless communication system
  • FIG. 3 is a schematic diagram of a method for indicating a control channel transmission format of a prior art
  • FIG. 4 is a schematic diagram of an implementation process of a method according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a system according to an embodiment of the present invention. detailed description
  • This general CCFI mapping method is used to indicate the specific transmission format of the control channel, and is applicable to various wireless communication systems that use multiple transmission format control channels.
  • the control channel of each subframe is described by taking a Long Term Evolution (LTE) wireless communication system of 3G radio interface technology as an example.
  • LTE wireless communication system can support two types of frame structures: The first type of frame structure is shown in Figure 1, which is applicable to LTE wireless communication systems using Frequency Division Duplex (FDD) mode.
  • the LTE wireless communication system adopts the Time Division Duplex (TDD) mode; the second type of frame structure is shown in FIG. 2, and is only applicable to the LTE wireless communication system adopting the TDD method.
  • the system transmission parameters are determined by the Node B, and the uplink and downlink service transmissions are all scheduled by the Node B.
  • the control channel transmits downlink control signaling
  • the uplink and downlink time slot ratio is 3:4
  • the downlink time slot is more than the uplink time slot, and each downlink subframe only needs to transmit the downlink scheduling control signal of the current frame.
  • the uplink scheduling control signaling and the ACK control signaling corresponding to the uplink subframe. If the ratio of uplink and downlink time slots is 6:1, the downlink time slot is much smaller than the uplink time slot.
  • Each downlink subframe needs to transmit not only the downlink scheduling control signaling of the current frame but also the uplink of the six uplink subframes. Scheduling control signaling and ACK control signaling.
  • the LTE wireless communication system adopts different modes, and the design of the control channel of each subframe is very different.
  • the indication method of the control channel transmission format adopted by the CCFI is also different.
  • the prior art is designed for different wireless communication systems. For the control channel, it is necessary to preset the CCFI corresponding to the designed control channel. That is to say, the CCFI involved in the prior art is not universal, but rather a relatively fixed value and corresponds to the control channel of the design.
  • a pre-designed frame format usually includes 14 orthogonal frequency division multiplexing (OFDM) symbols, and determines the front n of each downlink subframe.
  • the remaining 11 OFDM symbols are used to encapsulate the data.
  • the method for indicating the control channel transmission format by using CCFI includes the following steps:
  • the prior art cannot pre-set CCFI corresponding to the transmission characteristics of different wireless communication systems, and is particularly unsuitable for complex wireless communication systems.
  • the LTE wireless communication system in the TDD mode adopts the same CCFI indication method as the LTE wireless communication system in the FDD mode, it is inevitably applicable to all possible uplink and downlink time slot proportion configurations.
  • the embodiment of the present invention is different from the prior art in that the common CCFI mapping mode is adopted, that is, combining the information carried by the CCFI of the current wireless communication system and the extracted transmission parameters to establish a mapping relationship, and jointly determining the control channel indicated by the CCFI.
  • Specific transmission format information n Adopt this universal The CCFI mapping mode is used to indicate the specific transmission format of the control channel, and is applicable to various wireless communication systems that use multiple transmission format control channels.
  • the transmission format of the control channel can be known by the combination of the transmission format indication and the blind detection.
  • the so-called blind detection means that the transmission format information indication is not performed, and the receiver distinguishes according to some inherent characteristics of the control channel.
  • the blind detection does not require additional indication information, but the processing process is large in computation and high in hardware requirements, generally only applicable.
  • the so-called format indication refers to defining an additional transport format indication information indicating the transmission format of the control channel, which is simple in processing, does not require blind detection, but requires additional resources.
  • the embodiments of the present invention comprehensively consider the advantages and disadvantages of the blind detection and the transmission format indication, indicate the partial transmission format information with fewer bits, and determine the exact transmission format information by the blind detection, which can be the most between increasing the channel resources and reducing the computation amount. Good trade-offs.
  • the transmission format indication method according to the embodiment of the present invention is based on the following principles: 1 determining a total control channel transmission format set; 2 dividing a subset of the control channel transmission format according to some relevant system parameters; 3 using CCFI to indicate the content of each subset .
  • the relevant system parameter may be a transmission parameter that affects a transmission characteristic of the system, and the transmission parameter is not encapsulated in a frame structure of the subframe, but is notified to the transmitting and receiving parties of the communication by other means.
  • the number of elements in each subset is approximately equal, preferably the same, so that CCFI can be indicated by the same number of bits; 2 to extract relevant system parameters to be considered The total number of elements in each subset and the complexity of blind detection, both to ensure that CCFI can be indicated with fewer bits, and to control the complexity of blind detection in an acceptable range Within the circumference; 3
  • the relevant system parameters selected are preferably known to the sender and the receiver, so no additional information transmission is required.
  • the method further includes the following steps:
  • n is the specific transmission format information of the control channel indicated by the CCFI ;
  • D CCFI is the information carried by the CCFI;
  • the transmission parameter is determined by the Node B and the terminal transceiver party when establishing a connection.
  • the extraction of the transmission parameters should satisfy two basic principles:
  • the first basic principle according to the transmission parameter, the subset of the control channel transmission format can be limited, so that the subset satisfies the three conditions of the subset division;
  • the extracted transmission parameters are preferably known to both the transmitting and receiving parties, so that it is not necessary to transmit the transmission parameters before transmitting the CCFI.
  • the transmission parameter may be the uplink/downlink time slot ratio of the current wireless communication system, the transmission bandwidth of the current wireless communication system, the special configuration information of the current wireless communication system, or the current wireless communication system.
  • the type of service being transmitted, etc. are determined when the Node B establishes a connection with both the transceiver and the transmitting and receiving parties. It is not necessary to exchange this information, and only a certain subset of the control channel transmission format is indicated by CCFI.
  • Step 202 After the Node B establishes a connection with the terminal, the Node B encapsulates the control signaling into the subframe according to the value of n and sends the control signaling to the terminal, and simultaneously sends the eOT to the terminal through the CCFI channel.
  • Step 203 After receiving the subframe and the eeFi , the terminal extracts control signaling according to the value of n according to the value of n, and extracts data according to the resource location indicated by the control signaling. Read.
  • the system obtains the message from the system broadcast message sent by the Node B, for example, when the terminal accesses the system.
  • the mapping relationship is determined in step 201.
  • the n value is specifically determined according to the relationship between ⁇ and , and a configuration correspondence table may be set to determine the value of n, and the configuration correspondence table is stored on the Node B side and the terminal side respectively.
  • the mapping relationship is determined at the time of system design, and the mapping relationship is embodied as a configuration correspondence table; and the mapping relationship is known to both the transmitting and receiving parties in the communication, that is, the setting is set on both sides of the transmitting and receiving sides.
  • a configuration correspondence table Such a configuration correspondence table. Then, in the specific communication process between the transmitting and receiving parties, after the Node B establishes a connection with the terminal, the Node B can determine the value of n according to the transmission parameter and the control signaling code modulation mode and the like through the known configuration correspondence table.
  • the signaling transmission format is four-phase phase shift keying modulation, and the coding rate can be selected according to the control channel conditions: ⁇ 1/12, 1/6, 1/3, 2/3 ⁇ , and four modulation coding modes are available.
  • the uplink and downlink time slot ratio is a factor affecting the control channel transmission format
  • the uplink and downlink time slot ratio is extracted as a transmission parameter, and the transmission parameter is when the LTE wireless communication system is accessed, and the transmitting and receiving parties are connected when the link is established.
  • the agreed in other words, is well known to both parties and does not require additional information.
  • the CCFI length is 2 bits.
  • the first row in Table 1 represents the difference of the presets .
  • eCTi indicates that different control channels occupy resources.
  • the configuration correspondence table for example, in the configuration of different transmission bandwidths, according to the relationship between ⁇ and different transmission bandwidths, the configuration corresponding to the configuration shown in Table 2 is set.
  • Table to determine n The first row in Table 2 represents the difference of the presets .
  • eOT indicates that different control channels occupy resources.
  • the first column represents the difference of the extraction.
  • PRB Physical Resource Block
  • the number of o describes the transmission bandwidth of the system. From Table 2, it can be seen that the wireless communication system with small transmission bandwidth and large transmission bandwidth adopts different n respectively.
  • the configuration correspondence table for example, in the configuration of different special configuration information, according to the relationship between ⁇ and different special configuration information, the configuration correspondence table may also be set. To determine n.
  • the wireless communication system is a TDD system
  • some subframes of the TDD system are special.
  • the third symbol of some subframes is configured with a primary synchronization channel, so the special subframe control channels occupy the channel.
  • Resources cannot be consistent with normal sub-frames and require special conventions.
  • the subframe control channel is defined to occupy the first two OFDM symbols. Then, according to the relationship between ⁇ ure and different special configuration information System, set the configuration correspondence table as shown in Table 3 to determine n.
  • the first row in Table 3 represents the difference of the presets . eOT indicates that different control channels occupy resources.
  • the variable is the subframe in which the primary synchronization channel exists.
  • ⁇ corresponds to the two is the value of n.
  • n is the number of OFDM symbols, and is not more than 2.
  • the control channel is limited to a special subframe of an MBSFN subframe configured with a Multicast/Broadcast Single Frequency Network (MBSFN) service.
  • MBSFN Multicast/Broadcast Single Frequency Network
  • the first two OFDM symbols are occupied.
  • the configuration correspondence table shown in Table 4 is set to determine n.
  • the variable is the MBSFN subframe in which the MBSFN service is configured.
  • n is the number of OFDM symbols, not more than 2.
  • the limited control channel occupies at most the first two OFDM symbols, mainly from the perspective of improving resource utilization.
  • the first three OFDM symbols are usually used for the control channel to carry control signaling including downlink scheduling control signaling, uplink scheduling control signaling, and the like.
  • the downlink scheduling control signaling is used to control downlink service transmission of the downlink subframe, and uplink scheduling
  • the control signaling is used to control the uplink service transmission of a subsequent uplink subframe, and specifically, which uplink subframe is defined by a mode of hybrid automatic request retransmission.
  • a certain subframe may be configured as a special subframe for transmitting an MBSFN subframe of the MBSFN service.
  • the part for transmitting control signaling is reserved in the MBSFN subframe, so that the entire signaling structure of the system is not affected by the special subframe in which a normal subframe is configured as an MBSFN subframe, and remains consistent with the original system. . Since the entire signaling structure of the system remains consistent with the original system, it is not necessary for the user of the non MBSFN service to know the configuration of the MBSFN, and the processing is exactly the same. That is to say, the MBSFN subframe is completely used for configuring the MBSFN service, and does not need to configure control signaling such as downlink scheduling control signaling.
  • the part for transmitting control signaling is reserved in the MBSFN subframe, and only the system compatibility is considered, that is, the entire signaling structure of the system is kept consistent with the original system, so that the same applies when the non-MBSFN service is configured.
  • the downlink signaling control signaling for the non MBSFN service is not included in the control signaling of the MBSFN subframe. Therefore, the amount of scheduling signaling is smaller than that of a normal subframe. Considering that the normal subframe usually occupies the previous one, two or three OFDM symbols, it is more suitable for the special subframe of the MBSFN subframe to occupy the first two OFDM symbols for the control channel. If the setting still occupies three OFDM symbols, there is a waste of resources.
  • the terminal obtains the resource location occupied by the control signaling according to the value of n, and extracts the location of the resource from the subframe. Out of control signaling.
  • n is further the number of OFDM symbols used for encapsulating control signaling in the subframe, and in step 203, the terminal further learns the control signal according to the value of n.
  • the OFDM symbol position occupied is used to extract control signaling from the subframe.
  • an indication system for controlling a channel transmission format includes: The unit 11, the base station side extracting unit 12, the base station side mapping establishing unit 13, the base station side transmitting unit 14, the terminal side receiving unit 21, and the terminal side extracting unit 22. Further, the virtual boxes in FIG. 5 represent the base station side device and the terminal side device, respectively, and the base station side device and the terminal side device constitute the system of the embodiment of the present invention.
  • the base station side setting unit 11 is configured to pre-set the CCFI and send it to the base station side mapping and establishing unit 13;
  • the base station side extracting unit 12 is configured to extract the transmission parameter of the wireless communication system according to the transmission characteristic of the current wireless communication system, The signal is sent to the base station side mapping establishing unit 13.
  • the D CCFI is sent to the terminal side receiving unit 21; wherein, n is the specific transmission format information of the control channel indicated by the CCFI;) the eOT is information carried by the CCFI; and is a transmission parameter.
  • the base station side transmitting unit 14 is configured to transmit a subframe including control signaling and CCFI encapsulated according to the n value to the terminal side receiving unit 21.
  • the terminal side receiving unit 21 is configured to acquire the subframe and the eeFi , and acquire the ⁇ by using a system message and send the signal to the terminal side extracting unit 22; and the terminal side extracting unit 22 is configured to obtain the D CCFI according to the acquired
  • the n value is known, and a control command is extracted from the subframe according to the n value.
  • the base station side mapping establishing unit 13 includes a setting module: configured to set the established mapping relationship to a configuration correspondence table, and determine an n value by using the relationship between the eOT and the foregoing; correspondingly, the base station side mapping establishing unit 13 It is also used to send the configuration correspondence table to the terminal side receiving unit 21.
  • the system further includes: a base station side storage unit, a terminal side storage unit; and the base station side mapping establishing unit 13 is further configured to send the configuration correspondence table to the base station side storage unit; correspondingly, the base station side storage unit, The configuration correspondence table is received and stored.
  • the terminal side receiving unit 21 is further configured to send the configuration correspondence table to the terminal side storage list. And correspondingly, the terminal side storage unit is configured to receive and store the configuration correspondence table, and send the configuration to the terminal side extraction unit 22; the terminal side extraction unit 22 is further configured to learn, according to the configuration correspondence table, the n And obtaining a resource location occupied by the control signaling, and extracting control signaling from the subframe according to the value of n.

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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 concerne un procédé indicateur de format de transport de canal de commande, qui programme l'indicateur de format de transport de canal de commande CCFI. Le procédé comprend également : l'extraction du paramètre de transmission du système selon les caractéristiques de transmission du présent système de communication radio, l'établissement de la relation de mappage par n=Y (Dccfi, q) afin de confirmer la valeur de n selon CCFI et q; la station de base assemble la signalisation de commande à la sous-trame selon la valeur de n, envoie la sous-trame au terminal, et envoie DCCFI au terminal par le biais du canal CCFI simultanément; le terminal atteint la valeur n selon DCCFI et q, par la suite extrait la signalisation de commande depuis la sous-trame en fonction de la valeur de n, et lit les données selon la position de ressource indiquée par la signalisation de commande. Un système indicateur de format de transport de canal de commande est également divulgué. L'application du procédé et du système de la présente invention peut implanter l'indicateur de format de transport du canal de commande de façon efficace et simple.
PCT/CN2008/071628 2007-07-12 2008-07-11 Système et procédé indicateur de commande de format de transport de canal WO2009006857A1 (fr)

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WO2010124431A1 (fr) * 2009-04-27 2010-11-04 华为技术有限公司 Procédé de répartition, procédé de transmission et appareil pour signal de liaison montante dans une cellule de relais
CN102263616B (zh) * 2011-08-15 2018-07-20 中兴通讯股份有限公司 指示控制信道的方法及装置
CN110784928A (zh) * 2016-11-03 2020-02-11 华为技术有限公司 传输定时信息发送方法、接收方法及装置
CN108566680B (zh) * 2018-03-02 2022-07-05 中国科学院上海高等研究院 多物理资源块在上下行链路配置方法/系统、介质及设备
CN110972211B (zh) 2018-09-28 2023-10-20 华为技术有限公司 一种功率控制的方法和装置
CN113541860B (zh) * 2020-04-22 2023-08-22 维沃移动通信有限公司 控制信令格式确定方法、指示方法及设备

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WO2003041317A1 (fr) * 2001-10-19 2003-05-15 Interdigital Technology Corporation Systeme et procede pour adaptation de lien dynamique rapide
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CN101197611A (zh) * 2006-12-07 2008-06-11 大唐移动通信设备有限公司 一种数据传输的方法、系统及装置

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