1、Next Mobile Network Architecture,2012 02 15,這篇文章提出了下一代網(wǎng)絡(luò)（NMN）的一種通用結(jié)構(gòu)，NMN由四個平臺組成：先進的無線接入AMA、光纖移動網(wǎng)絡(luò)OMN、虛擬移動網(wǎng)絡(luò)VMN、服務(wù)交付網(wǎng)絡(luò)SDN。四個平臺的提出具有革命性的意義。NMN的目標是旨在提供最優(yōu)的服務(wù)，可以從三個方向深入描述：多媒體化、泛在化、全球化。這篇文章描述了關(guān)鍵下一代網(wǎng)絡(luò)組成技術(shù)的研究，比如：先進的無線傳輸、光纖網(wǎng)、虛擬網(wǎng)的移動性管理、泛在服務(wù)管理。,如今，在日本，有一億兩百萬3G用戶，在世界上有8億3千萬用戶在使用3G。3G已經(jīng)從WCDMA演進到了3.5G（HSPA），已經(jīng)接近最

2、后一個階段3.9G。3G核心網(wǎng)已經(jīng)從GSM電路交換演進為基于IP的分組交換。 這篇文章第二部分討論了NMN可以實現(xiàn)的三種方向的服務(wù)，第三部分描述了一般NMN結(jié)構(gòu)所支持的服務(wù)方向，第四部分給出了NMN的一些關(guān)鍵技術(shù)和研究。第五部分做出了總結(jié)。,三個服務(wù)目標,多媒體服務(wù)方向 泛在服務(wù)方向 全球服務(wù)方向,多媒體服務(wù)方向: 由于IMT-A旨在獲得1Gbps的吞吐量，NMN講提供同HD-TV同等質(zhì)量的視頻服務(wù)。鑒于可以IMT可忽略的信號延遲與NMN提供的智能化服務(wù)，將會出現(xiàn)一些復(fù)雜的服務(wù)，比如：,泛在服務(wù)方向 : For example, a woman may carry only cosmetic

3、items and an ornament (Fig.3). She does not need a handset because the ornament works as a mobile terminal. Each cosmetic item offers either mobile terminal functionality or has an RF-ID. In this example, her compact mirror is also a basic mobile terminal that provides visual display functionality.

4、The lipstick has a wireless sensor to track the amount remaining. Such information is reported to NMN via the ornament. NMN will inform her of a brand new lipstick that suits her and the location of the nearest shop through the compacts mirror when she walks around the shopping center.,全球服務(wù)方向: NMN i

5、s intended to offer the same services with same quality as offered by home network wherever users go around the world. For example, lets assume that a Japanese boy tries to talk with a Parisienne in Paris. The mobile terminal talks to the Parisienne on his behalf in real time by recognizing his Japa

6、nese, translating Japanese to French, and synthesizing the French equivalents. Note that his voice model has already been generated in advance.,NMN GENERAL ARCHITECTURE,To realize sophisticated services along with the service directions mentioned, we propose the general architecture of NMN shown in

7、Fig.5. NMN is composed of four planes: Advanced Mobile Access (AMA), Optical Mobile Network (OMN), Virtual Mobile Network (VMN), and Service Delivery Network (SDN).,AMA,Figure 6 shows the evolution in mobile radio access system capabilities. The peak user data rate in IMT-A will be achieved to 1 Gbp

8、s maximum. Furthermore, toward the next generation system, it may become possible to realize higher peak user data rate, e.g., 10 Gbps maximum. For the base station of AMA, we are first targeting 1 Gbps peak user data rate with wider service areas. By introducing Femto cells to the indoor environmen

9、t to meet dense local traffic needs effectively, and also introducing Relay cell base stations for service area complementation, much more flexible area expansion can be realized at lower cost.,OMN,隨著多媒體服務(wù)的應(yīng)用，網(wǎng)絡(luò)之間交換的數(shù)據(jù)量逐漸增大，隨著移動接入的寬帶化，為了用更小的功率達到所要求的服務(wù)質(zhì)量，就要使用光纖技術(shù)。 NMN數(shù)據(jù)量包括因特網(wǎng)流量、來自/流向外部網(wǎng)絡(luò)的流量、移動網(wǎng)絡(luò)中端到端的

10、流量。隨著一些新服務(wù)的出現(xiàn)（如視頻共享），端到端的流量逐漸增大，因此，NMN傳輸網(wǎng)絡(luò)需要個數(shù)據(jù)交換路徑一起連接到外部網(wǎng)絡(luò)。,SDN,The SDN in NMN will evolve to support further advanced network value added services (Fig.8). For example, Mobile Ubiquitous services enhanced by dynamic object management will make the most of cellular terminal mobility. To realize ob

11、ject management, a RF-ID reader equipped with wireless communication and GPS, will acquire the RF-ID information around the user and send the information to the ubiquitous information management server in SDN. This RFID reader function could be placed in the users carry bag as described in Section I

12、I.B.,VMN must be flexible in terms of dynamic configuration/ reconfiguration to utilize the limited resources efficiently while satisfying the service requests. Moreover, VMN needs to be capable of utilizing the physical networks of multiple OMNs across the world to realize global services. Successf

13、ul implementation will trigger a business paradigm shift. For example, in Figure 10, VMN1 is providing home services in Japan while VMN2 is providing the same sets of the home services to a specific area of France in response to the users request. This minimizes the need to keep full sets of physica

14、l resources in areas that users are not visiting while ensuring that the guaranteed services are available wherever the user is visiting.,VMN:,CONCLUSION This paper proposed a general architecture for NMN; it combines AMA, OMN, VMN, and SDN. NMN aims at offering sophisticated services while meeting

15、the trends of multimedia, ubiquitous, and global service. This paper described major research subjects on the key components such as advanced radio transmission, optical mobility management, virtual mobile networks, and ubiquitous service management in NMN. Currently, both mobile and fixed networks are evolving toward the All-IP network. Nevertheless, since their research and standardization activities have been conducted separately, the result is that we have similar, but different, All-IP