China Communications最新文献_第7页

Load distribution of base stations in user-centric heterogeneous UDN 以用户为中心的异构UDN中基站的负载分布

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-09-01 DOI: 10.23919/JCC.ea.2021-0751.202302

Xuanli Wu, Xu Chen, Ziyi Xie, Wei Wu, Tianzhu Pan, Yong Li

{"title":"Load distribution of base stations in user-centric heterogeneous UDN","authors":"Xuanli Wu, Xu Chen, Ziyi Xie, Wei Wu, Tianzhu Pan, Yong Li","doi":"10.23919/JCC.ea.2021-0751.202302","DOIUrl":"https://doi.org/10.23919/JCC.ea.2021-0751.202302","url":null,"abstract":"In ultra-dense networks (UDN), multiple association can be regarded as a user-centric pattern in which a user can be served by multiple base stations (BSs). The data rate and quality of service can be improved. However, BSs in user-centric paradigm are required to serve more users due to this multiple association scheme. The improvement of system performance may be limited by the improving load of BSs. In this letter, we develope an analytical framework for the load distribution of BSs in heterogeneous user-centric UDN. Based on open loop power control (OLPC), a user-centric scheme is considered in which the clustered serving BSs can provide given signal to interference plus noise ratio (SINR) for any typical user. As for any BS in different tiers, by leveraging stochastic geometry, we derive the Probability Mass Function (PMF) of the number of the served users, the Cumulative Distribution Function (CDF) of total power consumption, and the CDF bounds of downlink sum data rate. The accuracy of the theoretical analysis is validated by numerical simulations, and the effect the system parameters on the load of BSs is also presented.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"20 1","pages":"227-234"},"PeriodicalIF":4.1,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41709121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Grant-free random access in pilot-reused multiceli massive MIMO systems with backoff mechanisms 具有退避机制的导频复用多小区大规模MIMO系统中的免授权随机接入

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-09-01 DOI: 10.23919/JCC.ea.2021-0807.202302

Qi Zhang, Jun Zhang, Shi Jin

引用次数: 0

Integrated sensing and communication for future wireless networks 未来无线网络的集成传感和通信

3区计算机科学

China Communications Pub Date : 2023-09-01 DOI: 10.23919/jcc.2023.10251767

Shi Jin, Christos Masouros, Fan Liu, Jie Xu, Jie Yang

{"title":"Integrated sensing and communication for future wireless networks","authors":"Shi Jin, Christos Masouros, Fan Liu, Jie Xu, Jie Yang","doi":"10.23919/jcc.2023.10251767","DOIUrl":"https://doi.org/10.23919/jcc.2023.10251767","url":null,"abstract":"Integrated sensing and communication (ISAC) is anticipated to play a pivotal role in realizing the ability to sense, control, and optimize wireless environments, as well as providing ubiquitous connectivity with ultra-high throughput and reliability, and ultra-low latency for future wireless networks. Therefore, it can meet the requirements of mass data transmission, centimeter-level localization, and highly fine-grained environmental sensing for new applications, such as extended reality, holographic communication, autonomous driving, smart healthcare, and intelligent industry. The technology of ISAC deviates from traditional pattern of isolated design for communication and sensing. It can efficiently utilize wireless resources and potentially achieve mutual benefits by combining sensing and communication systems. The ultimate goal of the ISAC system has two aspects. On the one hand, the wireless communication system gains new functions, including device tracking, target localization, object identification, and radio environment mapping. On the other hand, communication performance is enhanced through sensing. However, the research on ISAC is still in its infancy, and the fundamental and comprehensive theoretical methods and technical standards have not yet been established.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135299504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mobility-aware caching strategy in an SDN-based cooperative caching network 基于SDN的协作缓存网络中的移动感知缓存策略

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-09-01 DOI: 10.23919/JCC.ea.2021-0262.202302

Qi Li, Xiaoxiang Wang, Dongyu Wang

{"title":"Mobility-aware caching strategy in an SDN-based cooperative caching network","authors":"Qi Li, Xiaoxiang Wang, Dongyu Wang","doi":"10.23919/JCC.ea.2021-0262.202302","DOIUrl":"https://doi.org/10.23919/JCC.ea.2021-0262.202302","url":null,"abstract":"The upsurge of mobile multimedia traffic puts a heavy burden on the cellular network, and wireless caching has emerged as a powerful technique to overcome the backhaul bottleneck and alleviate the network burden. However, most previous works ignored user mobility, thus not reaping the caching gain from user mobility and having limited practical applications. In this paper, a mobility-aware caching strategy for the software-defined network (SDN)-based network is studied. Firstly, since typical mobile user (MU) has multiple opportunities to connect with the nearby MUs and Small-base stations (SBSs), the contact times between MUs as well as between MU and SBSs are derived as the Poisson distribution and Gamma distribution. Secondly, we propose a two-tier cooperative caching strategy, where SBSs cache the rateless Fountain code encoded video blocks probabilistically and nonrepeatedly while MUs just store the whole encoded video received last time. The corresponding four-stage transmission process is analyzed, where the key intermediate step is the derivation of the service and the failing probabilities of each transmission manner. Finally, we derive the successful offloading rate and average data offloading ratio (ADOR) as performance metrics. A system optimization problem based on ADOR is formulated, and two solutions are proposed, namely, derivative-based solution (DB-Solution) and long-tail distribution approximation (LTD-Approximation). Simulation results demonstrate that the effectiveness of LTD-Approximation is similar to the DB-Solution, and the proposed caching strategy can achieve quasi-optimal performance compared with other contrast schemes.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"20 1","pages":"196-214"},"PeriodicalIF":4.1,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49405330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Architecture for cellular enabled integrated communication and sensing services 蜂窝集成通信和传感服务的体系结构

3区计算机科学

China Communications Pub Date : 2023-09-01 DOI: 10.23919/jcc.fa.2023-0155.202309

Bo Liu, Qixun Zhang, Zheng Jiang, Dongsheng Xue, Chenlong Xu, Bowen Wang, Xiaoming She, Jinlin Peng

{"title":"Architecture for cellular enabled integrated communication and sensing services","authors":"Bo Liu, Qixun Zhang, Zheng Jiang, Dongsheng Xue, Chenlong Xu, Bowen Wang, Xiaoming She, Jinlin Peng","doi":"10.23919/jcc.fa.2023-0155.202309","DOIUrl":"https://doi.org/10.23919/jcc.fa.2023-0155.202309","url":null,"abstract":"There is growing interest in the integrated sensing and communication (ISAC) to extend the 5G+/6G network capabilities by introducing sensing capability. While the solutions for mono-static or bi-static ISAC have shown feasibility and benefits based on existing 5G physical layer design, whether and how to coordinate multiple ISAC devices to better exert networking performance are rarely discussed. 3 <sup xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">rd</sup> Partnership Project (3GPP) has initiated the ISAC use cases study, and the follow-up studies for network architecture could be anticipated. In this article, we focus on gNB-based sensing mode and propose ISAC functional framework with given of highlevel service procedures to enable cellular based ISAC services. In the proposed ISAC framework, three types of network functions for sensing service as Sensing Function (SF), lightweight-Edge Sensing Function (ESF) and full-version-ESF are designed with interaction with network nodes to fulfill the latency requirements of ISAC use cases. Finally, with simulation evaluations and hardware testbed results, we further verify the performance benefit and feasibility to enable ISAC in 5G for the gNB-based sensing mode with new design on SF and related signaling protocols.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135299503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Mobile edge computing servers deployment with improved genetic algorithm in cellular Internet of Things 基于改进遗传算法的移动边缘计算服务器在蜂窝物联网中的部署

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-09-01 DOI: 10.23919/JCC.ea.2022-0185.202302

Huan Zhang, Junhui Zhao, Lihua Yang, Ziyang Zhang

引用次数: 1

Radar sensing via OTFS signaling 雷达感应通过OTFS信号

3区计算机科学

China Communications Pub Date : 2023-09-01 DOI: 10.23919/jcc.fa.2023-0060.202309

Kecheng Zhang, Zhongjie Li, Weijie Yuan, Yunlong Cai, Feifei Gao

{"title":"Radar sensing via OTFS signaling","authors":"Kecheng Zhang, Zhongjie Li, Weijie Yuan, Yunlong Cai, Feifei Gao","doi":"10.23919/jcc.fa.2023-0060.202309","DOIUrl":"https://doi.org/10.23919/jcc.fa.2023-0060.202309","url":null,"abstract":"By multiplexing information symbols in the delay-Doppler (DD) domain, orthogonal time frequency space (OTFS) is a promising candidate for future wireless communication in high-mobility scenarios. In addition to the superior communication performance, OTFS is also a natural choice for radar sensing since the primary parameters (range and velocity of targets) in radar signal processing can be inferred directly from the delay and Doppler shifts. Though there are several works on OTFS radar sensing, most of them consider the integer parameter estimation only, while the delay and Doppler shifts are usually fractional in the real world. In this paper, we propose a two-step method to estimate the fractional delay and Doppler shifts. We first perform the two-dimensional (2D) correlation between the received and transmitted DD domain symbols to obtain the integer parts of the parameters. Then a difference-based method is implemented to estimate the fractional parts of delay and Doppler indices. Meanwhile, we implement a target detection method based on a generalized likelihood ratio test since the number of potential targets in the sensing scenario is usually unknown. The simulation results show that the proposed method can obtain the delay and Doppler shifts accurately and get the number of sensing targets with a high detection probability.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135890164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Downlink resource allocation for NOMA-based hybrid spectrum access in cognitive network 认知网络中基于noma的混合频谱接入下行资源分配

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-09-01 DOI: 10.23919/JCC.ea.2021-0156.202302

Yong Zhang, Zhenjie Cheng, Da Guo, Siyu Yuan, Tengteng Ma, Zhenyu Zhang

{"title":"Downlink resource allocation for NOMA-based hybrid spectrum access in cognitive network","authors":"Yong Zhang, Zhenjie Cheng, Da Guo, Siyu Yuan, Tengteng Ma, Zhenyu Zhang","doi":"10.23919/JCC.ea.2021-0156.202302","DOIUrl":"https://doi.org/10.23919/JCC.ea.2021-0156.202302","url":null,"abstract":"To solve the contradiction between limited spectrum resources and increasing communication demand, this paper proposes a wireless resource allocation scheme based on the Deep Q Network (DQN) to allocate radio resources in a downlink multi-user cognitive radio (CR) network with slicing. Secondary users (SUs) are multiplexed using non-orthogonal multiple access (NOMA). The SUs use the hybrid spectrum access mode to improve the spectral efficiency (SE). Considering the demand for multiple services, the enhanced mobile broadband (eMBB) slice and ultrareliable low-latency communication (URLLC) slice were established. The proposed scheme can maximize the SE while ensuring Quality of Service (QoS) for the users. This study established a mapping relationship between resource allocation and the DQN algorithm in the CR-NOMA network. According to the signal-to-interference-plus-noise ratio (SINR) of the primary users (PUs), the proposed scheme can output the optimal channel selection and power allocation. The simulation results reveal that the proposed scheme can converge faster and obtain higher rewards compared with the Q-Learning scheme. Additionally, the proposed scheme has better SE than both the overlay and underlay only modes.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"20 1","pages":"171-184"},"PeriodicalIF":4.1,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48420439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Belief propagation list decoding for polar codes: Performance analysis and software implementation on GPU 极性码的信念传播链解码:性能分析及GPU上的软件实现

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-09-01 DOI: 10.23919/JCC.2023.00.100

Zhanxian Liu, Wei Li, Lei Sun, W. Li, Jianquan Wang, Haijun Zhang

引用次数: 0

Multiusers parallel competitive channel protocol based on unsaturated service 基于非饱和服务的多用户并行竞争信道协议

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-09-01 DOI: 10.23919/JCC.ea.2021-0219.202302

Y. Li, Mingchen Gao, Xin Xu, Guang Zheng, H. Qiao, Xinming Ma, Ping Dong

{"title":"Multiusers parallel competitive channel protocol based on unsaturated service","authors":"Y. Li, Mingchen Gao, Xin Xu, Guang Zheng, H. Qiao, Xinming Ma, Ping Dong","doi":"10.23919/JCC.ea.2021-0219.202302","DOIUrl":"https://doi.org/10.23919/JCC.ea.2021-0219.202302","url":null,"abstract":"In order to enhance the area throughput of next generation wireless local area network (WLAN) in high density scenarios, orthogonal frequency division multiple access (OFDMA) has been adopted as one of the key technologies in the next generation WLAN communication standards. However, the performance of the existing media access control (MAC) degrades significantly under unsaturated services. Therefore, this paper proposes a multi-user parallel contention channel MAC (MU-MAC) based on unsaturated services, which can effectively reduce the channel access conflict and improve the OFDMA access efficiency of cluster member nodes. On this basis, MU-MAC is enhanced for the spatial clustering group (SCG) formation protocol and support for the unsaturated service characteristics. Further, the optimal access radius when the service is in a non-saturated state is analyzed to make the relevant theoretical analysis more generally, and the expressions for the throughput and area throughput of the proposed protocol are modeled and derived. The simulation results verify the correctness of the theoretical analysis and the efficiency of the protocol performance. The results show that MU-MAC outperforms IEEE 802.11ax and OMAX protocol in area throughput by 40.72% and 104.15%, respectively.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"20 1","pages":"96-114"},"PeriodicalIF":4.1,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48668321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0