下一代网络技术:包转发与融合服务

需积分: 12 7 下载量 30 浏览量 更新于2024-07-17 收藏 14.59MB PDF 举报
"这些书籍涵盖了各种包转发技术及其在电信演进、下一代网络策略、混沌理论在电信中的应用、环境感知的普适计算系统、数字用户线(DSL)技术的基础、移动通信技术、服务和市场、IP多媒体子系统(IMS)、多协议标签交换(MPLS)在城域网中的应用以及蓝牙网络的性能建模和分析,以及内容分发网络的实用指南。" 包转发技术是网络通信的核心部分,涉及如何在网络中有效地传输数据包。在"Architecting the Telecommunication Evolution: Toward Converged Network Services"中,Vijay K. Gurbani和Xian-He Sun探讨了包转发技术在电信领域的应用,强调了在向融合网络服务过渡中的关键作用。融合网络服务要求高效的数据处理和转发机制,以支持多种业务的无缝集成。 "Introduction to Mobile Communications: Technology, Services, Markets"由Tony Wakefield、Dave McNally、David Bowler和Alan Mayne合著,深入介绍了移动通信技术,包括包转发在移动网络中的实施,这在提供连续和可靠的服务中至关重要。移动通信的发展不断推动着包转发技术的进步,以适应更高的数据速率和更大的连接密度。 IP多媒体子系统(IMS)是"IP Multimedia Subsystem: Service Infrastructure to Converge NGN, 3G and the Internet"的重点,由Rebecca Copeland撰写。IMS是实现下一代网络(NGN)与3G和互联网融合的关键,其中包转发技术是核心组成部分,确保了不同网络间的互通性和服务质量。 "MPLS for Metropolitan Area Networks"由Nam-Kee Tan撰写,详细阐述了多协议标签交换(MPLS)在城域网中的应用。MPLS是一种先进的包转发技术,通过预设的标签路径来提高网络效率和性能,尤其适合大流量和复杂服务的网络环境。 "Performance Modeling and Analysis of Bluetooth Networks: Polling, Scheduling, and Traffic Control"由Jelena Misic和Vojislav B. Misic共同研究,讨论了蓝牙网络的性能优化,包括包转发策略,这对于低功耗、短距离无线通信网络来说极其重要。 最后,"A Practical Guide to Content Delivery Networks"由Gilbert Held编写,介绍了内容分发网络(CDN)的工作原理,其中包转发技术用于将内容快速高效地分发到全球用户,减少延迟并提高用户体验。 这些书籍全面展示了包转发技术在不同网络环境和应用场景中的重要性,从基础的DSL技术到复杂的移动通信和IMS,再到优化的无线网络和内容分发,包转发技术都在推动着通信技术的不断发展和创新。

// TODO(eladalon): Consider using packet.recovered() to avoid processing // recovered packets here. std::unique_ptrForwardErrorCorrection::ReceivedPacket FlexfecReceiver::AddReceivedPacket(const RtpPacketReceived& packet) { RTC_DCHECK_RUN_ON(&sequence_checker_); // RTP packets with a full base header (12 bytes), but without payload, // could conceivably be useful in the decoding. Therefore we check // with a non-strict inequality here. RTC_DCHECK_GE(packet.size(), kRtpHeaderSize); // Demultiplex based on SSRC, and insert into erasure code decoder. std::unique_ptrForwardErrorCorrection::ReceivedPacket received_packet( new ForwardErrorCorrection::ReceivedPacket()); received_packet->seq_num = packet.SequenceNumber(); received_packet->ssrc = packet.Ssrc(); if (received_packet->ssrc == ssrc_) { // This is a FlexFEC packet. if (packet.payload_size() < kMinFlexfecHeaderSize) { RTC_LOG(LS_WARNING) << "Truncated FlexFEC packet, discarding."; return nullptr; } received_packet->is_fec = true; ++packet_counter_.num_fec_packets; // Insert packet payload into erasure code. received_packet->pkt = rtc::scoped_refptr<ForwardErrorCorrection::Packet>( new ForwardErrorCorrection::Packet()); received_packet->pkt->data = packet.Buffer().Slice(packet.headers_size(), packet.payload_size()); } else { // This is a media packet, or a FlexFEC packet belonging to some // other FlexFEC stream. if (received_packet->ssrc != protected_media_ssrc_) { return nullptr; } received_packet->is_fec = false; // Insert entire packet into erasure code. // Create a copy and fill with zeros all mutable extensions. received_packet->pkt = rtc::scoped_refptr<ForwardErrorCorrection::Packet>( new ForwardErrorCorrection::Packet()); RtpPacketReceived packet_copy(packet); packet_copy.ZeroMutableExtensions(); received_packet->pkt->data = packet_copy.Buffer(); } ++packet_counter_.num_packets; return received_packet; } 各行意义

2023-07-22 上传