]> Huawei Technologies Canada

Canada arashmid.akhavain@huawei.com

Huawei Technologies Canada

Canada hesham.moussa@huawei.com

Old Dog Consulting

UK daniel@olddog.co.uk

TBD discovery agents tasks data workloads Interacting entities such as agents, tasks, users, workloads, data, compute, etc., in AI ecosystem/network are proliferating, yet there is no standardised way to discover what entities exist, what attributes such as skills, capabilities, physical characteristics, etc., they posses, what services they offer, or how to reach them across organisational boundaries. Discovery today relies on proprietary directories or manual configuration, creating fragmented ecosystems that prevent cross-domain collaboration. This document describes the problem space that motivates Discovery of Agents, Workloads, and Named Entities (DAWN). It clarifies the scope of work within entity ecosystems, identifies why current approaches are insufficient, and outlines the challenges a standardised discovery mechanism must address. It does not propose a specific solution or protocol.

Introduction Entities in entity ecosystem collaborate to render services and follow the lifecycle shown in .

An example of Entity Lifecycle | registration process | +------------------------+ | +---------------------------+ | | | Identity Provisioning | | | +---------------------------+ | | | | | v | | +---------------------------+ | | | Authentication | | | +---------------------------+ | | | | | v | | +---------------------------+ | | | Authorisation | | | +---------------------------+ | +-------------------------------+ | v ************************************** | Discovery substrate access point | ************************************** | Discovery substrate | ************************************** | v +------------------------------------+ | Communication/Invocation/Operation | +------------------------------------+ | v +------------------------------------+ | Monitoring | +------------------------------------+ ]]>

As shown in , an entity will pass through a set of important functional blocks before it becomes active and start interacting with other entities in the ecosystem. This document focuses on the discovery problem space in the above diagram namely: "Discovery substrate access point" and "Discovery substrate". Entities increasingly need to discover, connect with, and collaborate with one another to deliver services. This discovery process is driven by the need to identify the most suitable set of entities that satisfy the requirements of a particular service. To achieve this, an entity must be able to find others based on attributes such as skills, capabilities, physical characteristics, names, and other relevant qualities they possess. Obviously, as static configuration is impractical at scale, an automated discovery of entities, their skills, and their capabilities becomes essential. Discovery within an AI ecosystem can be multi-dimensional and complex. A discovery request may trigger a cascade of subsequent discovery requests by other AI entities, occurring either sequentially or in parallel and the process might become unbounded. In addition, the discovery step can be interactive. For example, an entity might be looking for another entity that might not be available at the time of request (e.g., the desired entity might be busy). Furthermore, entities might be looking for a variety of other entities with different cards/descriptors. Discovery might also be subjected to either a system wide or local policy and might span cross organisation. There also challenges w.r.t the nature of discovery request itself as will be explained later in this document. Assuming that trust has already been established between entities and within the ecosystem in the steps prior to the discovery stage, the discovering entity must learn what the remote entity does, what attributes it posses, how to communicate with it, etc. This document describes the problem space and informs the development of requirements set out in and future solution proposals for Discovery of Agents, Workloads, and Named Entities (DAWN).

Terminology This document uses the following terms defined in :

• Attributes
• Discoverable Object
• Discovery
• Discovery Mechanism
• Entity
• Minimum Discoverable Information

Motivation The main motivation behind DAWN is to tackle the discovery problem space within the entity ecosystem. It is driven by a few factors:

• Discovery use cases in real‑world
  • Many practical scenarios require discovery, not only for agent‑to‑agent, but also agent‑to‑tools, agent‑to‑task, task-to-agent, and other forms of entity interaction.
• Limitations of traditional discovery methods
  • Existing discovery mechanisms are not designed to natively handle scenarios where entities are dynamic, mobile, cross-domain, or when they have complex attributes.
• Current approaches are ad-hoc, entity specific, and and do not scale:
  • Even in today's implementations (e.g., MCP‑based systems or A2A‑based systems), discovery tends to be contained and handled through simple mechanisms such as name lookup, search engines, or static agent cards/tool cards. These approaches work only in small, closed environments. They do not address challenges such as inter‑domain discovery, dynamic endpoint association, chained discovery queries, blind or exploratory search sessions, or large‑scale environments. In addition, they do not address the need of other discoverable entities such as task, workloads, etc.
• Emergence of discoverable entities, discoverable objects, and discovery mechanism:
  • Entities may have associated MDIs (e.g., task , capabilities, endpoints, policies), and that a discovery substrate/mechanism/vehicle is needed. The discovery substrate may implement unified mechanism or may support multiple discovery strategies depending on the scenario.

Example of Discovery Lifecycle in AI Ecosystem Consider a task owner (e.g., an entity such as an end user, AI agent, model, data owner, resource/compute owner) which intends to submit a task to the ecosystem and, as shown in Figure 1, has already been processed and accepted by the entity registration block. The following describes the steps after which the entity becomes available for discovery.

1. Discovery substrate access point validates the task owner's credentials and verifies that its associated discoverable object meets compliance requirements. The discoverable object is what the discovery substrate makes available/visible to system participants. It contains the minimum discoverable information (MDI) needed by discovering entities in the system to decide whether selection, authorisation, capability exchange, or communication should be attempted.
2. Validated task owners may submit their tasks to the system. Submitted tasks are discoverable entities themselves. They have their own discoverable objects (task card in this case) which the discovery substrates makes available/visible to other entities in the ecosystem once they pass through the entity registration block.
3. Registered discovering entities (e.g., an AI agent) may issue discovery queries to identify and/or locate discoverable objects. For example a validate task owner has a task that needs to be fulfilled by an AI agent. The task owner submits the discoverable object of its task (e.g., task card), the discovery substrate makes the task card visible and discoverable, various registered AI agents launch task discovery queries to locate suitable tasks to perform, a registered AI agent discovers the discoverable task card and determines suitability. The register AI agent can also launch other discovery queries to find other entities (e.g., other AI agents, compute resources, or inference data) that can participate in fulfilling the discovered task.
4. The discovery substrate processes discovery queries and returns the relevant validated discoverable objects such as tasks, agents, resources, etc., to the discovering entity that issued the query. It must be noted that the nature and structure of the query, the format of the discoverable objects (e.g., standardised object cards), and the discovery mechanism employed (e.g., simple name lookup or semantic matching) are key factors influencing the accuracy, volume, timeliness, etc., of the results. For example, the discovering entity may need to provide details about its skills, capabilities, pricing, or other relevant attributes so the discovery substrate can match its request with an appropriate subset of registered discoverable entities in the system.
5. Upon receiving the discovery results (e.g., a list of suitable entities), the discovering entity might need additional information before initiating its interaction with the discovered entities. For example, it might need to know more about the parent entity of the discovered entity whose name/ID can be potentially found in the discovered entity's discoverable object.

The example above illustrates the broader concept of discovery within an ecosystem. Other factors such as entity's mobility can further complicate the problem space. The example underscores the significance and complexity of the problem space that DAWN aims to address. It highlights why a structured problem definition, clear requirements, and well‑designed solutions are essential for enabling robust, scalable, and interoperable discovery across diverse entities and use cases.

Applicability The challenges outlined in the Motivation section underscore the need for mechanisms that allow discovering and discoverable entities to dynamically locate and interact within a decentralised ecosystem. DAWN is applicable in scenarios where discovery serves as a key enabler for autonomous operation, collaboration, and adaptive decision-making. In such systems, various discovery modes should be supported. For example, there needs to be support for entities that lunch discovery queries to find other entities, while also supporting scenarios where task owners including agents, users, or services may advertise needs (e.g., tasks to be completed) that suitable entities can discover and execute. Some discovery examples include Data sources can that make their datasets discoverable to support reasoning or training features needed by AI agents and models, compute resources may advertise their capabilities, serving as rendezvous points for entities, models, and datasets to facilitate training workflows, or models may advertise their functionality to allow users or entities to discover them for inference tasks. The following subsections provides more details, illustrating the contexts in which DAWN provides value and a consistent foundation for the functional requirements and design considerations.

Entities discovering Entities Entities frequently need to locate other entities to coordinate actions, share information, or engage in collaborative workflows. In some situations, an entity may already be aware of a counterpart possessing the required skills or capabilities. In other cases, entities must actively query the system to discover suitable peers by specifying the skills or attributes they are looking for. DAWN provides a framework to support both modes of discovery, enabling dynamic, capability-driven interactions in decentralised and heterogeneous environments. DAWN enables entities to advertise their presence, capabilities, and status, facilitating peer-to-peer interactions in ecosystems that are dynamic and hosts various types of entities. This is particularly relevant in large-scale deployments, cross-domain environments, or systems where entities may join or leave unpredictably.

Entities discovering needs In addition to discovering other entities, entities may also desire to locate needs advertised by other entities (e.g. Tasks) that require attention or contribution within a system. Needs can be advertised by users, other entities, or services, along with information such as required skills, priority, or dependencies. Since entities are aware of their own capabilities, they can match their skill sets against advertised needs and proactively apply for or claim the opportunity to fulfull the need for which they are suitable. DAWN provides mechanisms to make needs (e.g., Tasks) discoverable, enabling entities to query, filter, and select tasks efficiently, supporting autonomous orchestration, dynamic workflow formation, and load distribution across heterogeneous environments.

Entities/models discovering data Entities and models often require access to data distributed across multiple systems or administrative domains to perform training, inference, or reasoning tasks. This includes datasets, knowledge bases, or document repositories that may be advertised as discoverable entities with information such as format, availability, and access requirements. In Retrieval-Augmented Generation (RAG) scenarios, entities or models need to dynamically locate relevant external knowledge sources or documents to supplement generative reasoning, enabling more accurate and context-aware responses. Additionally, data in these environments may be dynamic, changing over time as new information is added or existing data is updated. DAWN provides mechanisms for discovering, tracking, and querying such evolving data sources, allowing entities and models to identify relevant information in real time while respecting access controls and provenance information.

Entities/models and data discovering compute Entities and models often require access to compute resources to perform tasks such as training, fine-tuning, or indexing. These resources may be distributed across multiple systems or administrative domains, and their availability, capacity, or configuration can change over time. In this context, compute resources can serve as rendezvous points, allowing entities, models, and datasets to converge and interact efficiently. DAWN provides mechanisms for entities, models, and data sources to discover compute resources that meet their requirements, including hardware capabilities, scheduling constraints, and current availability. By enabling dynamic identification of suitable compute nodes, DAWN supports elastic scaling of training workloads, efficient utilisation of heterogeneous infrastructure, and adaptive collaboration in decentralised and changing environments.

Discovering models for inference Users, agents, and services (i.e., entities) may need to leverage pre-trained models for inference in tasks such as prediction, recommendation, or decision-making. Models may be distributed across various systems or administrative domains, and their availability, capabilities, or performance characteristics can evolve over time. DAWN supports mechanisms to discover models that are most suitable for different contexts. This enables users, agents, services, etc. to dynamically adapt to newly available models, take advantage of improvements, and ensure interoperability in heterogeneous and evolving environments.

Taxonomy of Entities Classifying entities along multiple dimensions helps derive common as well as specific requirements in discovery processes and protocols for different types of entities. The following aspects are listed. This is not an exclusive list and it is expected that the list will evolve iteratively as new use cases are developed. Primary dimensions include:

• Identity Binding: Describes the relationship between an entity's identifier and its runtime deployment artifact (e.g., a single instance, cluster, physical device, IP/port, etc.). This determines the persistence of the identifier as well as the lifecycle and reachability characteristics of the resolved target object. Discovery mechanisms need to consider these characteristics when designing caching policies, refresh frequencies, and re-discovery conditions. For example: An AI agent may be bound to a dynamic service instance in a cloud computing environment, or it may be bound to a specific physical mobile device. The former may have an ephemeral identifier that changes across sessions, while the latter has a persistent identifier.
• Control Ownership: The administrative entity that has authority over the entity's lifecycle, configuration, and policy. This determines who publishes discovery information and who can update or withdraw it. For example: A computing workload may be owned by the user who submits it (control ownership lies with the user), while a network function deployed by a service provider is owned by that provider's organization.
• Responsible Party: The party that is operationally accountable for the entity's behaviour, including security, correctness, and policy compliance. This may differ from the control owner. This dimension relates to trust and attestation requirements in discovery. For example: In a Retrieval-Augmented Generation (RAG) scenario, the data source that is discovered and retrieved is the responsibility of its data owner. Meanwhile, the AI agent that consumes that data and generates new results is the responsibility of its agent provider.
• Dynamic Characteristic: The rate and predictability of change in the entity's discoverable properties (e.g., location, availability, load). This influences how discovery information should be published and cached. For example: The current load of a computing workload changes rapidly (high dynamism). In contrast, a deployed network function change rarely (low dynamism), allowing long-lived caching.
• Discovery Payload Richness: The level of detail and structure of discovery information that an entity can publish or that a query can expect to retrieve. This determines whether discovery information is embedded directly in the response or provided via references, and it also affects query language capabilities and caching granularity. For example: A simple network function may only advertise its IP address and port (minimal). An AI agent may publish a full capability card listing its skills, input/output schemas, and authentication method (rich).
• Cross-domain Visibility: The level of access control, entity discovery permissions, amount of information exposed, and selective publication of information are aspects that need to be considered when operating in multi-administrative domain environements.

For example: An AI agent's capabilities may be discoverable across domains to enable collaboration, but the backend computing services that execute the agent's tasks are only discoverable within the same administrative domain for security or policy reasons. The following presents a table of entity types. This is not an exclusive list and it is expected that more entity types will continue to be added as new use cases are developed. The table shows:

Taxonomy of Entities

Functional Requirements

Discovering Entities and Query Granularity Discovery in ecosystem should support different levels of granularity. Queries may range from broad capability-based searches (such as identifying all models with mathematical abilities) to more specific lookups (such as retrieve details about wolfram alpha math-expert agent). The discovery system should also enable entities to be found through the attributes reflected in their discoverable objects that capture aspects like their skill sets, functionality, name/ID, ratings, regional associations, and more.

Discovering Response and Minimum Discoverable Information Information an entity discovers about another entity must be meaningful and useful for delivering the required service. Accordingly, a response to a discovery query should include attributes that describe the discovered entity: such as what it can do, the skills it possesses, the protocols it supports, the security guarantees it claims to offer, the policies it can potentially enforce, its pricing for services, its current operational status (e.g., available, busy, or offline), communication means, etc. Such information can be either embedded within the entity's discoverable object or retrieved through a subsequent interaction outside the discovery substrate (for example, after discovery, an interview‑style exchange may be conducted using the communication method indicated by the entity - outside the scope of DAWN). In either case, there is a need for a standardized structure for discoverable objects that provides the minimum set of information (i.e., MDI) needed for the discovery substrate to return results that meaningfully support service delivery within the AI ecosystem.

Cross-Domain Collaboration Entities operating across organisational boundaries need to discover counterparts without depending on a shared infrastructure. For example, a customer-service agent in one organisation may need to find a logistics-tracking agent in another. Models in one administrative domain may need to find compute resources in another administrative domain for training. Similarly, a model or agent in one domain might need to use data in another domain for retrieval-augmented generation (RAG) based inference. Current platform-specific mechanisms do not interoperate, so entities remain invisible outside their own ecosystem. Administrative domains are typically unwilling to disclose their internal structures or detailed operational information to one another. In traditional networking, for instance, they use abstraction and aggregation techniques to share only high‑level insights about their operations. A standards‑based mechanism to support controlled information sharing while ensuring administrative domain interoperability without exposing sensitive internal details is potentially desirable.

Discovery and Dynamic Attributes in Discoverable Objects Entities whose discoverable objects contain dynamic attributes introduce distinct challenges for discovery. Dynamic attributes such as location information, dataset samples, compute capacity, etc., can change at different rates. These dynamics introduce variability that static discovery systems are not designed to handle. Such dynamic attributes complicate the assumptions in traditional discovery approaches and demand careful consideration when defining the problem space.

Broker and Aggregator Discovery In large‑scale networks, entities may need to discover intermediary broker nodes. These brokers often operate across multiple administrative domains with different jurisdictions. They also provide dynamic operational information, such as availability, capabilities, or decision guidance. In these scenarios, the intermediary brokers might need to discover other brokers. This makes the broker nodes another type of entity with its own discoverable object in an ecosystem. Discovery substrate needs to provide support for this capability via standards‑compliant procedures.

Human-Initiated Discovery Operators need to discover and inspect entities for operational purposes: auditing deployed agents, verifying capability claims, or troubleshooting failures. Discovery must be usable by humans through standard tooling, not only by automated systems.

Discovery and OAM Discovery systems require operational visibility, management, and diagnostic capabilities to ensure reliable operation across potentially distributed and cross-domain environments. Operators should be able to determine the behaviour of the discovery system and understand the reasons for discovery outcomes, failures, and policy decisions. The following outlines some of the operational aspects that need to be considered.

• Discovery Infrastructure Observability and Diagnostics: Operational managers require visibility into the availability, health, performance, and reachability of discovery system components, as well as the ability to determine whether discovery transactions can be successfully completed. Operational managers should also be able to observe discovery activity and determine the reasons for discovery outcomes, failures, performance degradation, and other system behaviours.
• Policy and Security Visibility: Discovery behaviour may be influenced by policies, trust relationships, authorisation decisions, and security mechanisms. Operational managers need visibility into how these factors affect discovery outcomes and the ability to identify abnormal or unauthorised activity.
• Discovery Information Tracking Management: Operational managers need to be able to monitor the status of discoverable objects and information in the system including its creation, modification, propagation, expiration, and removal. Operators might also need to access different statistics about the discoverable objects and optionally make reports available to authorised organisations (e.g owners, authorities, etc.).
• Discovery Chains and cross-Domain Operations: Discovery may involve a sequence of dependent discovery operations, potentially spanning multiple systems and administrative domains. Operational managers require visibility into discovery chains, dependencies, and interactions in order to understand discovery outcomes and to monitor and troubleshoot failures or performance issues that may occur along the discovery path.

Tooling to enable this function should be integral to the design of any solution and specific requirements for operational considerations can be found in .

Current Approaches and Their Limitations There are a few available approaches to discovery some of which are standardized and are in operations (e.g., DNS, DNS-SD, SSDP, and Webfinger), others are proposed in different venues and are still under development (e.g., DNS-AID and CATS), and others are designed to address certain needs and are packed by open source developers (e.g., A2A, MCP, and AGNTCY). A careful analysis and evaluation of these approaches to assess their suitability to meet the DAWN problem space and requirements, and to identify key gaps that shall be considered by future solutions is needed.

Core Challenges

Discovering Skills and Capabilities at Scale The central challenge is enabling entities to discover other entities based on some of their characteristics such as:

• Functions
• Skills
• Capabilities
• Services
• Requirements
• etc.

A discovery mechanism that supports structured, scalable discovery of an entity's capabilities across organisational boundaries is therefore required.

Fragmented Discovery Ecosystem Each platform develops its own discovery approach. This fragmentation prevents entities from being discoverable across boundaries and limits the value of interoperable protocols such as A2A and MCP.

Trust in Discovery Information When discovery crosses organisational boundaries, the discovering entity must verify that the information is authentic. Without authenticated discovery, entities are vulnerable to poisoning attacks directing them to malicious endpoints.

Scalability and Decentralisation Discovery must operate at Internet scale without a single centralised registry. Each organisation must be able to have governance over its published discoverable objects associated with its entities', enabling features such as independently adding new entities, updating information of currently published entities, removing discoverable objects of its pubished entities, monitoring status of published entities, retriving utility statistics...etc.

Static Versus Dynamic Properties Entity properties range from static (type, supported protocols, skills) to dynamic (availability, load, capacity). A discovery mechanism must handle both without causing stale results or excessive query load and shall be able to keep published information fresh and always up-to-date.

Extensibility New entity types, entity taxonomies, and entity description formats will emerge. Discovery must accommodate them without changes to the core mechanism.

Security Considerations This document describes a problem space, not a protocol. Discovery information is a high-value target. Poisoned responses could direct entities to malicious endpoints. Any mechanism must provide integrity and authenticity guarantees. Specific security-related requirements for any solution are captured in . Cross-domain discovery raises two distinct trust questions: whether the discovery source is authoritative, and whether the registered entity is what it claims to be. Discovery may expose sensitive information about an organisation's entities and capabilities. Selective visibility mechanisms are needed.

Privacy Considerations Querying for entities may reveal the discovering entity's intentions or interests. Discovery should minimise information leakage through the query process. Published entity properties, such as skills, capabilities, and organisational affiliations, may be sensitive. Entities and their operators should control the granularity and audience of published information.

Operational Consideration

Observability and Troubleshooting Providing sufficient visibility to understand discovery behaviour and diagnose failures are essential features for operations particularly in large-scale and cross-domain deployments. Operational personnel may need to determine:

• Whether a discoverable object is registered and reachable.
• Why a discovery query succeeded or failed.
• Which attributes influenced discovery results.
• Whether stale, inconsistent, or conflicting information exists.
• What causes delay in disocvery responses.

Discovery information can change over time as entities are created, modified, relocated, become unavailable, or are removed. This may cause many discoverable properties to be dynamic, such as availability, load, capacity, trust level, or operational status. Operators may also require tracking information such as:

• Registration and deregistration events.
• Attribute updates.
• Expiration and refresh status.
• Propagation delays.
• Historical state changes for audit and troubleshooting purposes.

Operators should be ableto monitor the freshness and propagation of such information while balancing update frequency against operational overhead.

Cross-Domain Operations Discovery is expected to occur across organisational boundaries. Operators may need visibility into:

• Discovery paths that span multiple domains.
• Delegation relationships.
• Failure points within a discovery chain.

Operational procedures should support troubleshooting when discovery outcomes depend on information obtained from multiple administrative domains.

Scalability and Performance Management Discovery may operate at Internet scale and support large numbers of entities and queries. Some operational considerations include:

• Query volume and rate management.
• Caching effectiveness.
• Discovery latency and propagation of information.
• Load distribution.
• Resource consumption of discovery services.
• Employing hierarchy.

Operators should be able to monitor and manage the performance characteristics of discovery systems under varying workloads.

Policy and Security Visibility Discovery results may be influenced by authorisation, trust policies, administrative restrictions, and security controls. Operators may require visibility into:

• Policy decisions affecting discovery outcomes.
• Authentication and authorisation failures.
• Detection of suspicious discovery activity, including abuse of discovery mechanisms or attempts to obtain or manipulate information beyond intended policy scope.

Such visibility is important for maintaining confidence in discovery information and supporting incident response activities.

Audit and Compliance Organisations may need records of discovery-related activities for governance, security investigations, or regulatory compliance. Examples include:

• Discovery requests.
• Attribute modifications.
• Administrative actions.
• Cross-domain information exchanges.

The extent of audit requirements will vary by deployment environment.

IANA Considerations This document makes no requests of IANA.

Potential Topics for the Use Case Document

• pre-configured static discovery, where entities have set relationships and only need to discover each other once in the beginning.
• Capability-Oriented Discovery, where an entity needs to discover another entity that can provide a function or capability.
• Chained Discovery, where a task requires the discovery of multiple entites either in pararell or in series.
• Resource-Oriented Discovery, where discovery identifies resources needed such as agents, workloads, compute, functions, applications, or users, to fulfill a given task.
• Closed-system Discovery, where the discover mechanims runs within a bounded controlled network of entities
• Open-system Discovery, where entities to be discovered may belong to different administrative domains.
• Interactive-discovery, where the discovery mechanims require additional rounds of interactions with the discovery query generating entitiy before the discovery request can be fulfilled.
• Reversed discovery, where a discovering entity published its needs in the form of discoverable objects that can be discovered by entities looking for offering their services.
• Operational Discovery, where discovery supports operation, audit, troubleshooting, compliance, or automation.

Acknowledgements Thanks to Adrian Farrel and Linda Dunbar for review comments.

References Normative References Old Dog Consulting China Mobile Deutsche Telekom Infoblox The proliferation of distributed systems, Artificial Intelligence (AI) agents, cloud workloads, and network services has created a need for interoperable mechanisms to discover entities. Entities may include AI agents, software services, compute workloads, and other named resources that need to be found and characterised before interaction can begin. This document defines terminology for Discovery of Agents, Workloads, and Named Entities (DAWN). The intention is that this common set of terms can be used by other documents related to DAWN and so achieve consistency of meaning across the space. Informative References Old Dog Consulting Old Dog Consulting The proliferation of distributed systems, Artificial Intelligence (AI) agents, cloud workloads, and network services has created a need for interoperable mechanisms to discover entities across administrative and network boundaries. Entities may include AI agents, software services, compute workloads, and other named resources that need to be found and characterised before interaction can begin. This document defines the requirements for Discovery of Agents, Workloads, and Named Entities (DAWN) and sets out the objectives that a discovery mechanism for such entities must satisfy. It describes what information must be discoverable, what properties a discovery mechanism needs to support, and what constraints apply to discovery in decentralised environments. This document does not specify any particular discovery protocol or solution.

Contributors China Mobile

China yaokehan@chinamobile.com