Lte Pucch Format 1a, Nprb - Number of physical resource blocks
- Lte Pucch Format 1a, Nprb - Number of physical resource blocks assigned to this allocation. 4. PUCCH资源分配的基本原则 PUCCH（Physical Uplink Control Channel）在LTE系统中扮演着传输上行控制信息的关键角色。 不同格式下的调制方式和资源分配直接影响PUCCH性能及网络稳定性。 PUCCH Format 1：适用于SR（Scheduling Request），仅需1个PRB，采用BPSK调制。 Format1/1a/1b格式的PUCCH资源，无论是SR还是ACK、NACK，都可以用一个常量的Index来表示。PUCCH所使用的循环移位和正交码都与这个Index有关。对于HARQ的ACK，NACK，PUCCH资源的Index与对应的下行PDCCH所占用的第一个CCE有关，这样一种隐含的对应关系节省了额外信令的开销。对于半静态调度（SPS,Semi－Persistent 4G/LTE - PHY Channel PUCCH Format PUCCH (Physical Uplink Control Channel) carries a set of information called "UCI (Uplink Control Information)". PUCCH Format 1,1a,1b Location How are the location of multiple PUCCHs from Multiple UE ? Effects of Parameters on PUCCH Format 1 location Signal Generation of PUCCH In case of any existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI deliverable is the one made publicly available in PDF format on ETSI deliver repository. Chan - uplink channel type specified as PUSCH or PUCCH (format) where format is the PUCCH format and is one of the following: 1, 1a, 1b, 2, 2a, 2b. Module 4 first part of Wireless Communication and 4G LTE Networks from Visvesvaraya Technological University pucch formats 1a, and 1b the pucch formats 1a and A PUCCH format 1a/1b (PUCCH format 1a/1b) is used to transmit response information of 1 or 2 bits, and the PUCCH format 1a/1b is sent in a sequence modulation manner. It is carried by PUCCH or PUSCH. The format determines the modulation type for the selected PUCCH. Format 1b (with Channel Selection) When A = 2 When A = 3 When A = 4 RRC Message Mapping - Format 1b Format 3 Which PUCCH Format to use Format 1b (with Channel Selection) Format 1b is not a new one. The choice of format depends on the amount of control information to be transmitted. It may remind you of DCI which is carried by PDCCH. 1 PUCCH format information 36. Two PUCCH format settings are available, one for non-SRS subframes, one for the cell specific Sounding Reference Signal (SRS) subframes. At most one resource block in each slot supports a mix of formats 1/1a/1b and 2/2a/2b. 1. Format 1 A request for uplink resources can be made by means of the random access channel. The physical resources used for PUCCH depend on parameters given by higher layers. Resources used for transmission of PUCCH format 1/1a/1b and 2/2a/2b are represented by the non-negative indices and , respectively. PUCCH Format 1 Processing Functions Block diagram view of the physical uplink control channel (PUCCH) format 1 processing and associated functions in the LTE Toolbox. The PUCCH in LTE has two formats: Format 1 and Format 1a/1b. 4G/LTE - Basic Procedures Channel Coding Processing for PUCCH Most of the details in this page is based on 36. This parameter applies only to PUCCH channels. As in LTE PUCCH (format 1,1a,1b, format 2,2a,2b and format 3), the baseband generation process for NR PUCCH is also very complicated. 211的5. This MATLAB function returns a matrix containing physical uplink control channel (PUCCH) format 1 symbols given a structure of UE-specific settings, a structure of channel transmission configuration settings, and hybrid ARQ (HARQ) indicator values. 4G/LTE - PHY Channel PUCCH Format PUCCH (Physical Uplink Control Channel) carries a set of information called "UCI (Uplink Control Information)". In case of any existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI deliverable is the one made publicly available in PDF format on ETSI deliver repository. Figure 1. ACK/NACK related to downlink data transmission blocks and downlink channel quality indicator (CQI). 1. As you know, all the purpose of PUCCH is just to send a few bits to gNB. 212 5. LTE PUCCH 的设计比较复杂，PUCCH Format有1,1a,1b,2,2a,2b,3等等多种格式。 PUCCH FormatNumber Of BitsUCI InformationSR Only, No Ack/NackFormat 1a1SISO Ack/NackFormat 1bFDD 1CC2MIMO Ack/NackFormat 1bFDD… The specific allocation and configuration of PUCCH resources are determined by the network and communicated to the UE. 211. 4G/LTE - PHY Channel UCI (Uplink Control Information) UCI stands for Uplink Control Information. 1-1, resulting in a complex-valued symbol. The modulation schemes for the Learn about the LTE PUCCH (Physical Uplink Control Channel), used for transmitting UCI (Uplink Control Information) such as HARQ ACK/NACK, CQI, and scheduling requests in the LTE system. The data type and data choices depend on the selected PUCCH format in accordance with 3GPP TS 36. Physical resource allocation is one of these topics. As you see in PUCCH Format page, the function of PUCCH Format 1,1a,1b is just to deliver 1 or 2 or 4 bits data to eNodeB. (This is similar to PDCCH which carries DCI (Downlink control information)". But there are pretty complicated process and factors as described below. For TDD HARQ-ACK multiplexing and a subframe n with M = 1, spatial HARQ-ACK bundling across multiple codewords within a DL subframe is not performed, 1 or 2 HARQ-ACK bits are transmitted using PUCCH format 1a or PUCCH format 1b, respectively for one configured serving cell. Enter a format number. The process in block diagram seems to be simple as shown below. Especially in frequency domain, you have so many resource blocks you can use (100 Resource Blocks in case of 20 Mhz Bandwidth At most one resource block in each slot supports a mix of formats 1/1a/1b and 2/2a/2b. 4节 [4] PUCCH Format 1,1a,1b Location-------PUCCH format 1/1a/1b在频域上的位置 This MATLAB function returns a matrix containing physical uplink control channel (PUCCH) format 1 symbols given a structure of UE-specific settings, a structure of channel transmission configuration settings, and hybrid ARQ (HARQ) indicator values. This parameter is always equal to 1 for PUCCH. 36. 2. 8 CQI performance requirements for PUCCH format 2 transmission on two antenna 36. 9 CQI performance requirements for PUCCH format 2 with DTX detection Default: 36. PUCCH supports different formats depending on the type of information being transmitted. 其中， format 2a，format 2b只支持正常的CP。 对于同一个UE，在一个子帧内不能同时传输PUCCH和PUSCH，在一个子帧中预留给PUCCH的资源块是半静态配置的。在同一子帧内，PUCCH前后两个时系的PRB资源分别位于可用的频谱资源的两端。如下图所示。将PUCCH放在可用资源的两端，将中间的整块频谱资源用来传送 PUCCH refers to the Physical Uplink Control Channel, which is used to transmit uplink control information in various formats, including short and long formats, depending on the number of bits to be sent and the duration required for reliable reception. For PUCCH formats 1a and 1b, one or two explicit bits are transmitted, respectively. The Physical Uplink Control Channel (PUCCH) carries the uplink control information (UCI). Depending on what kind of information the UCI in PUCCH carries, PUCCH is classified into various formation as follows. Click the Add New Channel button in the Physical Channel node and select PUCCH to open the Configure PUCCH window. Block diagram view of the physical uplink control channel (PUCCH) format 1 processing and associated functions in the LTE Toolbox. This MATLAB function returns a vector of hybrid-ARQ (HARQ) indicator values, ack, obtained by performing PUCCH Format 1 decoding of the complex matrix sym. For example, LTE defines Format 1 for single-bit ACK/NACK, Format 1a for SR (Scheduling Request), Format 1b for HARQ (Hybrid Automatic Repeat reQuest) feedback, etc. 141-8. 3 Uplink Control Information on PUCCH. 3节 [3] TS 36. 4G/LTE - Power Control Power Control When we study a new technology. 文章浏览阅读2k次。本文深入探讨了LTE中PUCCH信道编码的细节，包括HARQ ACK/NACK和CSI的编码过程。内容涉及不同传输模式下位数组a到b的转换，并阐述了编码后位数的变化情况。 36. Moreover, for PUCCH Formats 1, 1a and 1b, an extra degree of freedom is provided by applying an orthogonal cover code. Model PUCCH Format 1 This example shows how to model the control region used in an LTE uplink subframe and its channel structure. The information carried by UCI is mainly following three SR (Scheduling Request) HARQ ACK/NACK CQI UE This example shows how to model the control region used in an LTE uplink subframe and its channel structure. 7 ACK missed detection for PUCCH format 1a transmission on two The selection of PUCCH format depends on the amount of control information to be sent, the required robustness, and the need for multiplexing multiple UEs. PUSCH For TDD HARQ-ACK multiplexing and a subframe n with M = 1, spatial HARQ-ACK bundling across multiple codewords within a DL subframe is not performed, 1 or 2 HARQ-ACK bits are transmitted using PUCCH format 1a or PUCCH format 1b, respectively for one configured serving cell. This flexibility allows 5G NR to efficiently support a wide range of use cases and deployment scenarios. For PUCCH format 1, information is carried by the presence/absence of transmission of PUCCH from the UE. 1节和5. It was there for LTE release 8, but it has been extended to send 4 bit HARQ-ACK/NACK in LTE advanced. Image Source : Sharetechnote Table of Contents LTE PUCCH Introduction Summary of the Tutorial Test Setup Key Configuration Parameters Test 1 : SISO, CSI Disabled Configuration Run and Check Log Analysis In long term evolution (LTE) specification, physical uplink control channel (PUCCH) consists of two basic transmission formats, i. The format includes the size of the payload, the modulation scheme, and the coding rate. Yes, UCI is the counter part of DCI, but the information/role of UCI is very small comparing to DCI ( I think). If you keep asking the same questions to yourself, you would have some form of answer even Moreover, for PUCCH Formats 1, 1a and 1b, an extra degree of freedom is provided by applying an orthogonal cover code. . At eNodeB, conventional receiver detection algorithm is to do coherent data A PUCCH format 1a/1b (PUCCH format 1a/1b) is used to transmit response information of 1 or 2 bits, and the PUCCH format 1a/1b is sent in a sequence modula-tion manner. 3节的那 Moreover, for PUCCH Formats 1, 1a and 1b, an extra degree of freedom is provided by applying an orthogonal cover code. However, due to the probability of collisions during high intensity periods, an alternative method is provided using the PUCCH Format 1. This example shows how to use the LTE Toolbox™ to measure the probability of Acknowledgment (ACK) missed detection for multiuser Physical Uplink Control Channel (PUCCH) 1a. The following combinations of Uplink control information (UCI) are supported on PUCCH: HARQ-ACK using PUCCH format 1a or 1b Scheduling request (SR) using PUCCH format 1 HARQ-ACK and SR using PUCCH format 1a or 1b CQI/PMI or RI using PUCCH format 2 Nov 14, 2025 · PUCCH 格式 1/1a/1b 是向eNodeB传递1或2或4位数据。 这个过程相当复杂，我们用如下3个章节来描述： PUCCH Format 1,1a,1b 所在RB位置 PUCCH F1信号的生成 PUCCH 多UE 复用 PUCCH Format 1,1a,1b 所在RB位置 LTE中有很多课题 (尤其是物理层)，如果不仔细阅读规范中给出的每个参数和方程，是无法解释清楚的。物理资源分配 The exact location of PUCCH location and how many RBs are occupied by PUCCH is determined by a few RRC parameters and format of PUCCH. Format 2/2a is not allowed to set in the case Extended CP. formats 1a/1b and format 2, carrying some control signals fed back to eNodeB, e. 212 and 36. 7 ACK missed detection for PUCCH format 1a transmission on two 本文介绍了4G LTE PUCCH（上行控制信道）的格式、携带的信息类型，如SR、HARQ ACK/NACK、CSI等，并详细讨论了PUCCH的资源分配、码分复用技术以及格式1, 1a, 1b的内容与资源映射。 PUCCH利用正交码分复用技术在频域上共享资源，以提高上行链路效率。 Basically PUCCH formats are of two types Format 1 and Format 2 (Format 3 is introduced in LTE advance release 10, which uses modulation scheme QPSK and number of bits used as 48 per subframe). How can I resolve the issue ?". It means if this part is not properly configured or eNodeB failed to detect this part, eNodeB cannot decode PUSCH. 7 ACK missed detection for PUCCH format 1a transmission on two antenna ports 36. In the remainder of this clause, shall be assumed for PUCCH format 1. This example shows the transmission and reception of Physical Uplink Control Channel (PUCCH) Formats 1 and 2, including the case where the same physical resource is shared between transmissions of Format 1 and Format 2 simultaneously from two different User Equipments (UEs) using the LTE Toolbox™. 4G/LTE - PHY Channel PUCCH Format PUCCH (Physical Uplink Control Channel) carries a set of information called "UCI (Uplink Control Information)". It was combination of Time Domain, Frequency Domain and the modulation scheme. PUCCH Format PUCCH Format 1,1a,1b Location PUCCH Format 2,2a,2b Location PUSCH RS Carries the Reference Signal that is required for demodulating PUSCH. PUCCH information Size metrics indicate number of most-significant bits 在某些情况下，SRS可能占用PUCCH子帧的最后一位符号，这样，在PUCCH子帧的后一个时系，HARQ符号也采用长度为3的正交码序列。 Format1/1a/1b格式的PUCCH资源，无论是SR还是ACK、NACK，都可以用一个常量的Index来表示。 PUCCH所使用的循环移位和正交码都与这个Index有关。 This example shows how to model the control region used in an LTE uplink subframe and its channel structure. 4G/LTE - DCI DCI When you study the physical frame structure of LTE, you may be impressed by flexibility (meaning complexity in other way) of all the possible ways of resource allocation. 2133GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Physical layer proceduresRelease 17TS [2] 《LTE - The UMTS Long Term Evolution, 2nd Edition》的16. PUCCH format 1/1a/1b 本文主要介绍PUCCH format 1/1a/1b，主要内容包括：PUCCH 1/1a/1b携带的信息、PUCCH 1/1a/1b如何调制到RB中、PUCCH 1资源表示、deltaPUCCH-Shift对cyclic shift的影响、一个RB包含多少个PUCCH 1资源的计算、如何解读36. e. See 3GPP TS 36. 4G/LTE - PHY Channel PUCCH Format 2,2a,2b There are many topics in LTE (especially on PHY layer) which cannot be cleary explained without going through each parameters and equations shown in the specification. The block of bits shall be modulated as described in Table 5. 213 for more information. This is always located at the center of Uplink slot. 211, 36. g. 3. 4G/LTE - PHY Channel PUCCH Format 1 As you see in PUCCH Format page, the function of PUCCH Format 1,1a,1b is just to deliver 1 or 2 or 4 bits data to eNodeB. one of way to efficiently learn/understand about it would be to assume that you are the designer/developer of the technology and ask yourself "Now I have this and this problem in such and such situation. The actual PUCCH format used is either 1a or 1b depending upon the number of HARQ-ACK bits but for the calculation of resources in this tool one can use ‘PUCCH Format 1’. 其中， format 2a，format 2b只支持正常的CP。 对于同一个UE，在一个子帧内不能同时传输PUCCH和PUSCH，在一个子帧中预留给PUCCH的资源块是半静态配置的。在同一子帧内，PUCCH前后两个时系的PRB资源分别位于可用的频谱资源的两端。如下图所示。将PUCCH放在可用资源的两端，将中间的整块频谱资源用来传送 10. tawrs, 3kba, c06g, vyumn, mtmlmc, 6ogea3, xvuy5, wu3ri, lpds, u5ua,