This paper presents V-Guard, a new permissioned blockchain that achieves consensus for vehicular data under changing memberships, targeting the problem in V2X networks where vehicles are often intermittently connected on the roads. To achieve this goal, V-Guard integrates membership management into the consensus process for agreeing on data entries. It binds a data entry with a membership configuration profile that describes responsible vehicles for achieving consensus for the data entry. As such, V-Guard produces chained consensus results of both data entries and their residing membership profiles, which enables consensus to be achieved seamlessly under changing memberships. In addition, V-Guard separates the ordering of transactions from consensus, allowing concurrent ordering instances and periodic consensus instances to order and commit data entries. These features make V-Guard efficient for achieving consensus under dynamic memberships with high throughput and latency performance.

翻译：本文提出V-Guard，一种新型许可区块链，可在车辆网（V2X）网络中成员动态变化场景下实现车载数据共识，以解决车辆在道路上间歇性连接的问题。为达成此目标，V-Guard将成员管理集成至数据条目共识过程中，通过为每条数据条目绑定描述负责共识的车辆成员的配置档案，从而生成数据条目及其对应成员配置文档的链式共识结果，实现成员动态变化下的无缝共识。此外，V-Guard将交易排序与共识分离，支持并发排序实例与周期性共识实例并行处理数据条目的排序与提交。上述特性使V-Guard能够在高吞吐量、低延迟条件下有效实现动态成员环境下的共识。