Trading Strategies in Radio Spectrum
Management
Advisor ：Wei-Yeh Chen
Student ：楊
于
世

Reference

Choong Ming Chin, S. Olafsson, B. Virginas and G. Owusu
“Trading Strategies in Radio Spectrum Management,” in
ISWPC Santorini island , pp. 680 - 684 , May 2008 .
1
Outline

Introduction

Spectrum Trading

Simulation Results

Conclusion
2
Introduction(1/2)

Radio spectrum is a limited natural resource and with the ever
increasing size of the wireless mobile community coupled(結
合).

With the demand for high-speed multimedia communications,
efficient resource management of systems to make best use of
this resource is an essential step.
3
Introduction(2/2)

Radio resource management (RRM) is one of the most
challenging and one of the most important aspects in the
provisioning of quality of service (QoS) for wireless
communication systems.

In this paper we propose a novel radio spectrum trading via
derivatives(衍生) contracts as a means to address short-term
demands for spectrum whilst ensuring end-to-end QoS is met.
4
Spectrum Trading(1/2)

Spectrum trading is a market based mechanism where, ideally,
buyer/lessees and seller/lessor, determine the assignments of
spectrum and its uses.

The network bandwidth price is adjusted based on the
bandwidth demand of all the network providers via a spectrum
broker mediating(調節) between buyers and sellers of
spectrum.
5
Spectrum Trading(2/2)

In this paper, using the concept of derivatives contracts we
present a spectrum trading strategy to address short-term
spectrum demands between network providers.

In the financial market, the most common underlying variables
in derivatives contracts are stock prices, foreign currency(貨幣)
exchange rates and commodity(商品) prices.
6
Spectrum
Spectrum
A
B
Contract
Broker
優點：可以透過契約直接使用其他頻譜，不需要另外競爭。
缺點：價格隨時的變化，而且必須遵守市場機制，不得討價還價。
7
評估頻
寬需求
dCi (t ) = mi Ci (t ) dt + si Ci (t ) dWi (t )
Ci(t):表示頻寬需求在隨機時間t的時候
根據需求
調整價格
μi:需求的成長率
σi:頻寬需求的變化
判斷頻
寬需求
dWi(t): dWi(t) ~ N(0, dt)
大於需求
買進契約
log(
小於需求
d=
Ci (t )
1 2
)
+
(
m

s i )(T  t )
^
i
2
Ci
si T t
賣出契約
8
評估頻
寬需求
P0
1
S (t ) = exp(
N
M
根據需求
調整價格
M
 logC (t ))
i =1
i
S(t) :一單位頻寬在某時間當時的價格
判斷頻
寬需求
大於需求
小於需求
賣出契約
買進契約
P0 :一開始頻寬的價格
N :比率係數
M :市場的參予者
9
Simulation Results

To provide realistic models for the trading simulation of future
wireless networks we let each network provider i =1, 2, . . .,M
have a maximum bandwidth capacity of 10 Gbps.

We present the bandwidth demand and market price generated
by M = 4 network providers (NP) with initial bandwidth
demand between 1 Gbps and 4 Gbps.
10
Bandwidth demand (a) and bandwidth market price (b).
11
Bandwidth capacity with and without trading.
12
Call options bought and sold by network providers.
13
Conclusion

這篇論文主要是說明頻譜之間的交易策略，這裡所採用的
方法就是訂定一個短期的契約，使頻譜之間的交易可透過
契約來履行彼此之間的交易，根據所訂的契約來滿足使用
者對於其他頻譜使用的要求。
14