Name of Group | 4.03 Onboard Wireless Working Group | Area | Spacecraft Onboard Interface Services Area (SOIS) | Chairperson | Kevin K Gifford | Chairperson E-Mail Address | kevin.gifford@colorado.edu | Chairperson Agency | NASA | Deputy Chairperson | Yuriy Sheynin | Deputy Chairperson E-Mail Address | sheynin@aanet.ru | Deputy Chairperson Agency | RFSA | Mailing List | sois-wir@mailman.ccsds.org | Scope of Activity | The mission of the Wireless Working Group (WWG) is to serve as a general CCSDS focus group for wireless technologies. We will investigate and make recommendations pursuant to standardization of applicable wireless network protocols, ensuring the interoperability of independently developed wireless communication assets.
The WWG is focused on wireless, either RF or optical, networks, (i.e., WLAN, WPAN, WMAN, and sensor networks) and does not consider point-to-point wireless standards that are addressed by other CCSDS technical areas including Space Link Services (SLS) and Space Internetworking Services (SIS).
The goal of the Wireless Working Group is to provide the CCSDS development community and participating members with standards-based resources to achieve interoperable wireless network communications, including specific protocol recommendations for anticipated communication scenarios associated with, but not limited to, Lunar and Martian exploration activities. The deliverables will be provided in the form of a Green Book summarizing wireless usage scenarios and technology applicability, followed by a set of Magenta and Blue books specifying current best practices in the application of wireless network communications for asset management, intra-vehicle communication, high data-rate (HDR) wireless communications, and for support of ground-based assembly, integrations and test (AIT) operations. | Rationale for Activity | CCSDS develops communications and mission operation standards that support inter- and intra-agency operations and cross support. CCSDS standards include elements of flight and ground systems that are developed and operated by different agencies and organizations. International standards for wireless space networking do not yet exist. The CCSDS has subcategorized wireless short-range and surface proximity networks as:
1) Intra-vehicle: Internal vehicle (or habitat) extremely short-range wireless links and networking (up to 10 m range).
2) Inter-vehicle: Vehicle-to-vehicle short-range and medium range (up to 20 km).
3) Planetary surface-to-surface wireless links and networking (up to several kilometers).
a. EVA (Extra-Vehicular Activity) local links with planetary rover vehicles (RV) and/or habitats; b. RV-habitat links when RV is close to habitat; c. Links between independent local systems (e.g., habitats, robots, external assets).
4) Orbiter relay-to-planetary surface links and networking.
The recommendations of this Working Group will enable member agencies to select the best option(s) available for space communications and internetworking, based upon industry-standard evaluation metrics such as power expenditure, data rates, noise immunity, and range of communication as well as on space systems metrics such as reliability, availability, maintenance and safety.
Wireless communications is an enabling technology for both manned and unmanned spacecraft – it enables untethered mobility of crew and instruments, increasing safety and science return, and decreasing mass by eliminating expensive cabling. Wireless networks automatically enable communication between compliant devices that dynamically come into and out of range of the network. Wireless communication is fundamental for communicating outside of a spacecraft (e.g., inter-spacecraft communications, planetary surface communications), and provides for mobile crew monitoring within a habitat or spacecraft (intra-vehicle communications). Added value for using wireless communications is also identified for the ground.
From an engineering standpoint, mission managers, along with engineers and developers, are faced with a plethora of wireless communication choices – both standards-based and proprietary. The provision of a CCSDS standard reference that summarizes wireless protocol capabilities, constraints, and typical deployment scenarios, will decrease the up-front engineering evaluation effort significantly, and provide a standards-based common reference to improve interoperability between disparate systems that need to cooperate in wireless data transmission and networking. | Goals | The goals of the working group are as follows.
1. Derive, and publicize in a CCSDS Green Book, communications usage cases for the three initial focus areas of (1) asset tracking and management; (2) intra-vehicle communications; and (3) assembly, integration and test (AIT) activities. The Green Book shall:
Summarize canonical usage scenarios;
Include a technology assessment of current wireless technologies applicability for the each focus area;
Summarize (speculative) requirements associated for each focus areas; and
Identify gaps in available technology when contrasted with operational requirements associated for each focus area.
2. Prepare three two Magenta books to summarize scenarios, requirements, and suggested wireless protocols requirements for:
Asset/inventory tracking and control via wireless communications;
Low data-rate wireless communications for spacecraft monitoring and control;
High data-rate wireless communications for spacecraft monitoring, control and multimedia services.
3. Prepare two Blue books to specify wireless communication standards for:
RFID tag encoding for inventory management and control and sensing
High data-rate wireless communications for spacecraft monitoring, control and multimedia services, including intra-vehicle communications and communications for extra-vehicular activities. | Survey of Similar Standards Efforts Undertaken in
Other Bodies and elsewhere in CCSDS | | Patent Licensing Applicability for Future Standards | None | Technical Risk Mitigation Strategy | To mitigate the technical risk, the following coordination activities are identified for the WWG.
1. Coordinate activities with SLS that contribute to the technical assessment of wireless protocols and requirements for surface inter-asset communications, including location and ranging scenarios;
2. Coordinate activities with SLS that contribute to the technical assessment of wireless protocols and requirements for surface inter-vehicle communications, including location and ranging scenarios.
3. Interact with the Systems Engineering Security Working Group to ensure security concerns are adequately addressed in all recommended wireless standards.
4. Summarize the interoperability of recommended wireless protocols at the physical, data link, network, and transport layers of the OSI communications protocol stack.
6. Facilitate reference implementations and performance of interoperability testing. | Management Risk Mitigation Strategy | To mitigate the management risk, the following coordination activities are identified for the WWG.
1. Guide adoption and derivation of interoperable wireless communication protocols in support of CCSDS activities.
2. Hold working meetings with other Working Groups to develop consistent approaches and formulate plans for integrating wireless communications into the activities of other CCSDS Working Groups.
3. Evolve and maintain the WWG Green Book and Magenta and Blue Books to provide comprehensive wireless protocol reference documents for use by CCSDS member agencies and Working Groups. |
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