WO2011060584A1 - Procédé et système pour acquérir un mode de mappage de trame - Google Patents

Procédé et système pour acquérir un mode de mappage de trame Download PDF

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Publication number
WO2011060584A1
WO2011060584A1 PCT/CN2009/075040 CN2009075040W WO2011060584A1 WO 2011060584 A1 WO2011060584 A1 WO 2011060584A1 CN 2009075040 W CN2009075040 W CN 2009075040W WO 2011060584 A1 WO2011060584 A1 WO 2011060584A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame mapping
base station
mobile terminal
sacch frame
station subsystem
Prior art date
Application number
PCT/CN2009/075040
Other languages
English (en)
Chinese (zh)
Inventor
柯昌伟
刘晨吉
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to PCT/CN2009/075040 priority Critical patent/WO2011060584A1/fr
Publication of WO2011060584A1 publication Critical patent/WO2011060584A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the present invention relates to a Voice Service over Adaptive Multi-user channels on One Slot (VAMOS) system, in particular, a Global System for Mobile Communications (GSM) system.
  • VAMOS Voice Service over Adaptive Multi-user channels on One Slot
  • GSM Global System for Mobile Communications
  • FIG. 1 is a schematic diagram of a network architecture of a conventional GSM system.
  • the core network includes a base station controller (BSC, Base Station Controller) and a base station (BTS, Base Station).
  • BSC Base Station Controller
  • BTS Base Station
  • the BSC and BTS can in turn be collectively referred to as a Base Station Subsystem (BSS).
  • BSC Base Station Controller
  • the interface between the core network and the BSC is called the A interface.
  • the interface between the BSC and the BTS is called the Abis interface.
  • the interface between the BTS and the mobile terminal (MS) is called the Um interface.
  • the core network, BSC and BTS work together to provide complete mobile voice service capabilities to the MS.
  • FIG. 2 shows the network architecture of the flattened GSM system.
  • the flattened GSM network mainly includes the core network and the enhanced base station (eBTS, Enhanced Base). Station ) Two floors.
  • the interface between the core network and the enhanced base station is an A interface
  • the interface between the enhanced base station and the mobile terminal is an Um interface
  • a new interface is defined between the enhanced base stations, which is called an enhanced inter-base station interface, and is enhanced.
  • the inter-base station interface is used for interaction between the enhanced base station and the enhanced base station.
  • HSPA+ or Long Term Evolution (LTE) networks operate in the same architecture, and this flat GSM and HSPA+ or LTE co-spectrum operation will enable operators to have limited spectrum resources.
  • the source is dynamically shared among different wireless technologies (eg GSM, HSPA+, LTE, etc.).
  • An application scenario that may occur is as follows: HSPA+ or LTE occupies most of the spectrum resources, and GSM occupies a small portion of spectrum resources, but the number of GSM users does not decrease drastically.
  • the GSM network is required to provide voice services for these users with relatively less spectrum resources.
  • the traditional GSM technology is brought to great challenges. Because the traditional GSM is a Time Division Multi Access (TDMA) system, the system capacity is limited to TS (Time Slot) resources, and one TS can only carry one full rate (FR, Full Rate) voice at the same time. User or two half-rate (HR, Half Rate) voice users.
  • TDMA Time Division Multi Access
  • VAMOS Voice Services over Adaptive Multi-user channels on One Slot
  • FIG. 3 is a schematic diagram of multiplexing HR channels of existing HR users.
  • two HR users ul, u2 multiplex HR channel 1, and two other HR users u3, u4 multiplex HR Channel 2 at this time, since HR channel 1 and HR channel 2 are different frequencies, the SACCH channels between users do not interfere with each other.
  • four HR users ie, ul, u2, u3, and u4 are shared into one time slot, and HR channel 1 and HR channel 2 are in the same frequency, and the same SACCH frame mapping mode is used.
  • the SACCH frame mapping method is prior art, and this document is called In the traditional SACCH frame mapping mode, the SACCH channels of ul and u3, u2 and u4 will become co-channel interference with each other, and since the SACCH always uses the maximum power transmission, the interference between the SACCH channels is further aggravated.
  • FIG. 4 is a schematic diagram of an HR user multiplexing HR channel using offset SACCH technology.
  • u3 and u4 use a technique called offset SACCH frame mapping, which enables users of VAMOS subchannel 1.
  • the SACCH frames of the VAMOS subchannel 2 users (shown by the small squared shading in Fig. 4) do not appear at the same time, and therefore, it is impossible to become interference with each other.
  • the traffic channel TCH corresponding to the user will turn off the transmit power, and the SACCH channels of other users on the same VAMOS channel will not be interfered by the same frequency. , thereby improving the performance of the SACCH channel and ensuring communication quality.
  • the appearance of the offset SACCH frame mapping method also introduces a problem that in the network using the VAMOS technology, there are two kinds of SACCH frame mapping modes, a traditional SACCH frame mapping mode and an offset SACCH frame mapping mode.
  • a traditional SACCH frame mapping mode since the traditional SACCH frame mapping mode may be used, or the offset SACCH frame mapping mode may be used, the mobile terminal needs to know the SACCH frame mapping manner used for the call.
  • this mapping method is not fixed in order to achieve the best communication effect.
  • the BSS may change according to wireless environment, traffic and other factors (such as the channel changes from non-VAMOS mode to VAMOS mode or On the other hand, the SACCH frame mapping mode is modified, and the traditional SACCH frame mapping mode is changed to the offset SACCH frame mapping mode, or the offset SACCH frame mapping mode is changed to the conventional SACCH frame mapping mode.
  • the main object of the present invention is to provide a method for acquiring a frame mapping manner, which can ensure the consistency of the SACCH frame mapping manner adopted by the base station subsystem and the mobile terminal, thereby ensuring a successful call of the mobile terminal.
  • Another object of the present invention is to provide a method for acquiring a frame mapping manner, which can ensure the consistency of the SACCH frame mapping manner adopted by the base station subsystem and the mobile terminal, thereby ensuring a successful call of the mobile terminal.
  • a method for obtaining a frame mapping manner includes:
  • the base station subsystem notifies the mobile terminal of the information that changes the SACCH frame mapping mode used by itself; the mobile terminal adopts the same SACCH frame mapping mode as the obtained SACCH frame mapping manner.
  • the information used in the SACCH frame mapping manner is changed to be carried in a custom message or an existing message to inform the mobile terminal.
  • the base station subsystem notifying the mobile terminal of the information includes:
  • the information that the base station subsystem changes the SACCH frame mapping mode used by the base station subsystem is carried in the channel mode modification message and sent to the mobile terminal.
  • the base station subsystem also sends the effective time information of the SACCH frame mapping mode used by the base station subsystem to the mobile terminal;
  • the mobile terminal uses the same SACCH frame mapping mode according to the time specified by the effective time.
  • the information that the SACCH frame mapping mode used by the base station subsystem changes is: the SACCH frame mapping mode used after the change; or
  • the change information of the SACCH frame mapping mode changes.
  • the information of the SACCH frame mapping manner used by the base station subsystem changes after the change
  • the SACCH frame mapping method used after the change is represented by an indicator of one or more bit information.
  • the method further includes: when the information that the base station subsystem does not notify the mobile terminal of the change of the SACCH frame mapping mode used by the mobile terminal is set in advance, the SACCH frame mapping mode used by the mobile terminal by default does not change.
  • a system for acquiring a SACCH frame mapping manner includes at least a base station subsystem and a mobile terminal, where
  • a base station subsystem configured to notify the mobile terminal of information that changes the SACCH frame mapping manner used by itself;
  • the mobile terminal is configured to receive the SACCH frame mapping mode used by the base station subsystem.
  • the base station subsystem is further configured to send, to the mobile terminal, the effective time information of the SACCH frame mapping mode used by the mobile terminal.
  • the SACCH frame mapping mode used by the mobile terminal by default does not change.
  • the base station subsystem is specifically configured to: notify the mobile terminal that the information of the SACCH frame mapping mode used by the base station is changed in a custom message or an existing message.
  • the information that the base station subsystem changes the SACCH frame mapping mode used by the base station subsystem is carried in the channel mode modification message and sent to the mobile terminal.
  • the base station subsystem is further configured to: send, to the mobile terminal, effective time information that changes the SACCH frame mapping manner used by the base station subsystem;
  • the mobile terminal uses the same SACCH frame mapping manner according to the time specified by the effective time. It can be seen from the above technical solution provided by the present invention that during the call setup after the call is established, the base station subsystem notifies the mobile terminal of the change of the SACCH frame mapping manner used by the mobile terminal by the method of the present invention, after the network uses the VAMOS technology.
  • the mobile terminal that implements the SACCH frame mapping mode used by the base station subsystem to change the SACCH frame mapping mode and the traditional SACCH frame mapping mode is timely and clearly known which SACCH frame mapping mode should be used.
  • the consistency of the SACCH frame mapping mode adopted by the base station subsystem and the mobile terminal ensures the successful call of the mobile terminal.
  • FIG. 1 is a schematic diagram of a network architecture of a conventional GSM system
  • FIG. 2 is a schematic diagram of a network architecture of a flat GSM system
  • 3 is a schematic diagram of multiplexing HR channels by existing HR users
  • FIG. 4 is a schematic diagram of a HR user multiplexing HR channel using an offset SACCH technology
  • FIG. 5 is a flowchart of a method for acquiring a SACCH frame mapping manner according to the present invention
  • FIG. 6 is a schematic diagram of a system for acquiring a SACCH frame mapping manner according to the present invention
  • FIG. 7 is a flowchart of a first embodiment of a method for acquiring a SACCH frame mapping manner according to the present invention
  • Flowchart of the second embodiment. 5 is a flowchart of a method for obtaining a SACCH frame mapping manner according to the present invention.
  • the method of the present invention includes the following steps:
  • Step 500 The base station subsystem notifies the mobile terminal of information that the SACCH frame mapping manner used by itself is changed.
  • the base station subsystem uses itself.
  • the information indicating that the SACCH frame mapping mode changes is notified to the mobile terminal.
  • the base station subsystem may notify the mobile terminal of the SACCH frame mapping manner used after the change, and may also be the change information (such as the setting change) that changes the SACCH frame mapping manner.
  • the flag bit is valid, and the specific implementation manner is many, and is not used to limit the protection scope of the present invention.
  • the base station subsystem may carry information indicating that the SACCH frame mapping mode used by itself is changed in a message such as a custom message sent by the mobile terminal or an existing air interface downlink signaling message, such as a channel mode modification.
  • the base station subsystem may further carry the effective time of the SACCH frame mapping mode used by the base station subsystem in the custom message or the existing message to further ensure strict synchronization of the SACCH frame mapping manner of the base station subsystem and the mobile terminal.
  • Step 501 The mobile terminal adopts the same SACCH frame mapping manner as the obtained SACCH frame mapping manner.
  • step 500 the mobile terminal obtains the SACCH frame mapping mode used after the change of the base station subsystem, or the change information of the SACCH frame mapping mode of the base station subsystem, and the mobile terminal immediately adopts the same SACCH frame as the obtained SACCH frame mapping manner.
  • the mapping mode or the SACCH frame mapping mode specified by the base station subsystem is started at a specified time according to the effective time in the change information.
  • the mobile terminal that supports the offset SACCH frame mapping mode and the traditional SACCH frame mapping mode clearly knows which SACCH frame mapping mode should be used, and ensures the base station subsystem and the mobile
  • the consistency of the SACCH frame mapping mode adopted by the terminal ensures the successful call of the mobile terminal.
  • the SACCH frame mapping mode used by the mobile terminal does not change.
  • a system for acquiring a SACCH frame mapping manner is also provided, as shown in FIG. 6.
  • a base station subsystem and a mobile terminal are included, wherein
  • the base station subsystem is configured to notify the mobile terminal of information that changes the SACCH frame mapping manner used by itself.
  • the mobile terminal is configured to receive the SACCH frame mapping mode used by the base station subsystem.
  • the base station subsystem is further configured to send, to the mobile terminal, the effective time information of the SACCH frame mapping mode used by the mobile terminal.
  • FIG. 7 is a flowchart of a first embodiment of a method for obtaining a SACCH frame mapping manner according to the present invention. As shown in FIG. 7, the method includes:
  • Step 700 The base station subsystem carries the function of the existing protocol, and when the used SACCH frame mapping mode changes, in this embodiment, the H ⁇ in the Channel Mode Modify message carries the new SACCH currently used by the base station subsystem.
  • the frame mapping method informs the mobile terminal.
  • the base station subsystem can inform the mobile terminal of the SACCH frame mapping manner currently used by itself by the expression of the indicator shown in Table 1.
  • Table 1 The indicator shown in Table 1 is used to inform the mobile terminal which SACCH frame mapping mode should be used.
  • Table 1 is a byte, including 8 bits, where the indicator of the SACCH frame mapping mode occupies 1 bit, which is used to indicate whether the mobile terminal uses the traditional SACCH frame mapping mode or the offset SACCH frame mapping mode. The value of this bit is shown in Table 2.
  • the indicator of the SACCH frame mapping mode may occupy two or more bits, and is used to indicate that the mobile terminal adopts a specific SACCH frame mapping manner, and the specific implementation belongs to the present disclosure. Those skilled in the art are accustomed to technical means and will not be described here.
  • FIG. 8 is a flowchart of a second embodiment of a method for obtaining a SACCH frame mapping manner according to the present invention. As shown in FIG. 8, the method includes:
  • Step 800 The base station subsystem carries the function of the existing protocol, and when the used SACCH frame mapping mode changes, in this embodiment, H ⁇ carries the new SACCH currently used by the base station subsystem in the Channel Mode Modify message. The frame mapping mode and its effective time information are notified to the mobile terminal.
  • the information that changes the SACCH frame mapping manner used is carried in the Channel Mode Modify message as an example, and is not used to limit the protection scope of the present invention.
  • the information of the changed SACCH frame mapping mode may also be carried in a custom message or other existing message, as long as the SACCH frame mapping manner currently used by the base station subsystem is notified to the mobile terminal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un système pour acquérir un mode de mappage de trame. Au cours d'un processus de conversation ultérieur à l'établissement d'un appel, un sous-système de station de base notifie un terminal mobile d'un message concernant un changement qui se produit dans le mode de mappage de trame d'un canal de signalisation associé lent (« Slow Associated control Channel » ou SACCH) utilisé par le sous-système lui-même, le terminal mobile utilise le même mode de mappage de trame SACCH que le mode de mappage de trame SACCH acquis. Grâce au procédé de la présente invention, après avoir utilisé une technologie VAMOS (Voice services over Adaptive Multi-user channels on One Slot) dans le réseau, une fois que le sous-système de station de base décide de changer le mode de mappage de trame SACCH utilisé, le terminal mobile qui supporte simultanément les modes de mappage de trame SACCH changé et SACCH traditionnel peut connaître de façon distincte et opportune le mode de mappage de trame SACCH qui doit être utilisé, et ainsi la cohérence entre les modes de mappage de trame SACCH utilisés par le sous-système de station de base et celui utilisé par le terminal mobile est garantie, pour que l'appel réussi à partir du terminal mobile soit assuré.
PCT/CN2009/075040 2009-11-19 2009-11-19 Procédé et système pour acquérir un mode de mappage de trame WO2011060584A1 (fr)

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PCT/CN2009/075040 WO2011060584A1 (fr) 2009-11-19 2009-11-19 Procédé et système pour acquérir un mode de mappage de trame

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PCT/CN2009/075040 WO2011060584A1 (fr) 2009-11-19 2009-11-19 Procédé et système pour acquérir un mode de mappage de trame

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080159246A1 (en) * 2006-12-29 2008-07-03 Kari Niemela Data transmission in mobile communication system
CN101485224A (zh) * 2006-06-19 2009-07-15 株式会社Ntt都科摩 基站、移动台和通信方法
WO2010019556A1 (fr) * 2008-08-12 2010-02-18 Interdigital Patent Holdings, Inc. Procédé et appareil d'attribution de canal de commande dans un réseau geran à l'aide du concept de sous-canaux orthogonaux

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101485224A (zh) * 2006-06-19 2009-07-15 株式会社Ntt都科摩 基站、移动台和通信方法
US20080159246A1 (en) * 2006-12-29 2008-07-03 Kari Niemela Data transmission in mobile communication system
WO2010019556A1 (fr) * 2008-08-12 2010-02-18 Interdigital Patent Holdings, Inc. Procédé et appareil d'attribution de canal de commande dans un réseau geran à l'aide du concept de sous-canaux orthogonaux

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI TECHNOLOGIES CO., LTD.: "New strategy on SACCH for downlink MUROS.", 3GPP TSG GERAN #39, GP-081026, 25 August 2008 (2008-08-25) *

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