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sw_throughput

Avoid overestimated throughput from Shannon bounds by computing realistic edge-user metrics with 3GPP link-to-system mapping, including modulation, coding, and implementation losses.

Instructions

真实吞吐(Mbps)与 3GPP 口径的边缘用户指标,不是香农上界。

sw_link_performance 给的是 SE = Σ log2(1+SINR)——香农谱效,是个 任何真实系统都达不到的上界。这个工具走业界做系统级仿真的标准路径 (链路到系统映射),把三项真实损失算进来:

  1. 调制受限 —— 20 dB 时香农说 6.66 bit/s/Hz,64QAM 最多给 5.80

  2. 码率离散 —— MCS 只有 29 档

  3. 有限码长 + 实现损失 —— LDPC 距容量 1~2 dB

返回吞吐的均值/中位/5% 边缘用户/95% 峰值、谱效、MCS 分布、平均 BLER。 边缘用户吞吐是 3GPP 评估里的公平性指标,比均值更能说明问题。

mcs_table:1 = 最高 64QAM(38.214 Table 5.1.3.1-1), 2 = 含 256QAM(Table 5.1.3.1-2)。MCS 分布里大量样本压在最高档时, 说明限制来自 MCS 表而不是信道,换表 2 通常能明显提升。

BLER 是模型不是实测:MCS/CQI/TBS 都按 38.214 精确算,QAM 约束容量 精确求积,但 BLER 用的是有限码长模型(没有 3GPP 参考曲线兜底)。 严格 BLER 结论请跑真正的链路级仿真。

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
methodNosvd
mcs_tableNo
dataset_idYes
max_samplesNo
target_blerNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations were provided, so the description carries the full burden. It discloses that BLER is a model, not a measurement, and explicitly lists the three real-world losses (modulation limitation, code rate granularity, finite block length + implementation loss). It also reveals the behavioral nuance that MCS saturation indicates a table limitation rather than channel limitation. This is far more than typical disclosure.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is lengthy but well-structured: it opens with a clear definition, uses a numbered list for the three losses, and separates output metrics from MCS table guidance. Every sentence earns its place, and the formatting aids readability. It is slightly longer than strictly necessary but appropriate for the tool's complexity.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description provides rich context about methodology, output metrics, and limitations, and an output schema exists. However, with 5 parameters and zero schema descriptions, key parameters like `method`, `max_samples`, and `target_bler` are left unexplained. This gap means an agent may not know how to set them correctly, making the tool only partially complete for correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It explains `mcs_table` thoroughly (1 vs 2, 38.214 tables), but says nothing about `method`, `max_samples`, or `target_bler`. These parameters remain ambiguous, and the description does not provide enough detail for an agent to select appropriate values. While `dataset_id` is self-evident, the others need explanation.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description opens with a specific verb+resource: '算**真实吞吐**(Mbps)与 3GPP 口径的边缘用户指标' (compute real throughput and 3GPP edge user metrics), and explicitly contrasts with the sibling `sw_link_performance`, which computes the Shannon-bound spectral efficiency. This clearly differentiates the tool's purpose from alternatives.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly explains when to use this tool vs. `sw_link_performance`: the latter provides only an unattainable Shannon upper bound, while this tool models real-world losses. It also gives concrete guidance on MCS table selection (if MCS distribution saturates, switch to table 2) and cautions that strict BLER conclusions require a link-level simulator. This directly answers 'when to use' and 'when not to use'.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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