5G MAC Glossary, Variables, and Constants
A glossary page is not the deepest page in the library, but it is one of the most useful support pages because it reduces repeated definition clutter across the whole MAC cluster.
This page should stay lean and lookup-focused. It works best as a support reference for quick confirmation of meaning while reading deeper procedure or decoder pages.
| Page type | Supportive reference and quick lookup page |
|---|---|
| Main use | Confirm terms, identifiers, timers, and abbreviations quickly |
| Best use | Students and readers moving between MAC pages |
| Design rule | Keep entries short and precise |
What belongs in the MAC glossary
The scope to expect.
The glossary should hold high-frequency support items: abbreviations, identifiers, timers, and common notational shortcuts that appear repeatedly across the MAC library.
It should not turn into a substitute for the real concept pages. If a term needs procedure-level explanation, the glossary should point outward instead.
Recommended entry families
The best categories to organize first.
| Entry family | Examples of what belongs here |
|---|---|
| Abbreviations | SR, BSR, PHR, DRX, HARQ, TA |
| Identifiers and terms | LCID-related terms, channel-group terminology, access terms |
| Timers and state language | Terms commonly used in DRX or procedure explanations |
| Variable-style notation | Short names and symbols that appear in standards-aware explanations |
Useful starter entries for the glossary
The first lookup items that add immediate value.
| Term | Short meaning | Best follow-up page |
|---|---|---|
| SR | Request for uplink opportunity | Scheduling Request |
| BSR | Backlog report for uplink data waiting at MAC | BSR |
| PHR | Report showing available uplink power margin | PHR |
| TA | Timing alignment adjustment for usable uplink transmission | Timing advance |
| LCID | Identifier used when parsing MAC PDU content | PDU and subheader format |
| HARQ | Retransmission control loop at the MAC and PHY boundary | HARQ |
Glossary design rules
How to keep the page useful.
- Keep definitions short and precise
- Link outward when a term needs a full explanation
- Avoid duplicating complete procedure text
- Use the page as support, not as the main learning path
FAQ
Why does the MAC section need a glossary page?
Because repeated definitions across many pages create clutter. A glossary gives readers one support page for fast lookup.
Should deep procedure explanations live in the glossary?
No. The glossary should stay short and point to the deeper pages when needed.
Who benefits most from the glossary?
Students and readers moving quickly between overview, procedure, and decoder pages.