WO2011144004A1

WO2011144004A1 - Radio resource management method and device supporting voice services over adaptive multi-user channels on one slot technique

Info

Publication number: WO2011144004A1
Application number: PCT/CN2011/073670
Authority: WO
Inventors: 王东
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-05-19
Filing date: 2011-05-04
Publication date: 2011-11-24
Also published as: CN102256310A

Abstract

A radio resource management method and device supporting Voice services over Adaptive Multi-user channels on One Slot (VAMOS) technique are provided by the present invention. The method includes: when a Traffic Channel (TCH) is mapped to a frame of one sub-channel of the VAMOS channel and a Slow Associated Control Channel (SACCH) is mapped to the same frame of the other sub-channel of the VAMOS channel, the power of the TCH in the frame for the users sharing the VAMOS channel is decreased. By decreasing the power of the TCH mapped to the same frame as the SACCH, the radio resource management method and device can reduce the interference to SACCH and improve the system performance.

Description

Radio resource management method and device supporting VAMOS technology

Technical field

The present invention relates to a voice service over Adaptive Multi-user channels on One Slot (VAMOS) in a Global System of Mobile communications (GSM) network. Technology wireless resource management methods and devices. Background technique

With the increasing demand for mobile voice services, mobile wireless resources are becoming more and more tense, and many technologies for improving spectrum utilization efficiency have emerged. VAMOS technology is one of them. The core idea of VAMOS is to increase the efficiency of spectrum utilization and the capacity of the entire system by simultaneously carrying two or more users on one GSM time slot.

With VAMOS technology, a GSM channel carrying more than one active mobile station MS (Mobile Station) at the same time is called a VAMOS channel. The application of VAMOS technology provides more wireless channel resources for the system, but at the same time increases mutual interference between users at the same time, and this interference must be the strongest co-channel interference, resulting in a decline in signal reception quality, so it needs to be very good. The receiver of the interference cancellation technique cooperates to introduce a relatively high manufacturing cost mobile device. At the same time, the VAMOS system also needs to support the traditional MS. Therefore, if the traditional GSM system Radio Resource Management (RRM) algorithm can be improved, the efficiency of wireless resource utilization can be effectively improved, thereby increasing the network capacity.

The Slow Associated Control Channel (SACCH) is a dedicated signaling channel accompanying the Traffic Channel (TCH), such as a test report for transmitting the signal strength received by the mobile station with respect to the serving cell and neighboring cells. It is vital that the mobile station participates in the handover function. Therefore, the performance of SACCH is directly related to the quality of network services, and its transmission quality must be guaranteed.

According to the conventional GSM 26 frame mapping structure, for the VAMOS network, a half rate TCH/HS channel is taken as an example, as shown in FIG. 1, where T is a traffic channel and S is a SACCH channel. When four half rate (HR) users ul_u4 are multiplexed onto one VAMOS channel, ul and u2 are conventional users, and one TDMA frame is multiplexed in the conventional manner, and is in the first VAMOS subchannel; u3, u4 share TDMA frames. , in the second VAMOS subchannel. Since the SACCH channel has no discontinuous transmission (Discontinuous Transmission, DTX) mechanism, it can be seen that the SACCH signals of ul, u3 or u2, u4 are co-channel interference with each other, and such interference is inevitable or reduced. Um and u3 are called common VAMOS channel interference users, which are mutual channel interference; u2 and u4 are called common VAMOS channel interference users, which are mutual channel interference.

After introducing the shifted SACCH, as shown in FIG. 2, in this shifted SACCH mode, the SACCH frame positions of u3 and u4 in the second VAMOS subchannel are advanced by 6 frames and 7 frames, respectively, and moved to As shown in Figure 2, the ul and u2 service subchannels can be used to improve the performance of the SACCH channel after the introduction of the VAMOS. However, the SACCH channel may also be subject to other interference, and its performance can be further improved. Summary of the invention

The technical problem to be solved by the present invention is to provide a radio resource management method and apparatus supporting the VAMOS technology to improve the performance of the SACCH channel.

In order to solve the above technical problem, the present invention provides a radio resource management method for supporting a multiplexed single-slot adaptive multi-user channel bearer voice service technology, including:

When one frame of a subchannel of a multiplexed single-slot adaptive multi-user channel bearer voice service (VAMOS) channel is mapped with a traffic channel, and the same frame of another subchannel of the VAMOS channel is mapped with a slow associated control channel That is, when the SACCH channel is used, the traffic channel power of the user of the VAMOS channel in the frame is reduced.

Preferably, the VAMOS channel includes a first subchannel and a second subchannel;

The VAMOS channel includes a first subchannel and a second subchannel;

The method further includes: acquiring some or all of the SACCH frame positions in the first subchannel, denoted as F _SACCH , and acquiring some or all of the SACCH frame positions in the second subchannel, denoted as SF _SACCH ;

The reducing the traffic channel power of the user of the VAMOS channel in the frame comprises: reducing a traffic channel power of the first subchannel user SF _SACCH frame;

The traffic channel power of the F- _{th SACCH} frame of the second sub-channel user is reduced.

Preferably, the acquiring part or all of the SACCH frame positions in the first subchannel is acquiring part or all of the SACCH frame positions in the first subchannel in one mapping period; Obtaining part or all of the SACCH frame positions in the second subchannel is to obtain a part or all of the SACCH frame positions in the second subchannel in a mapping period; and the reducing the traffic channel power of the user in the frame in the common VAMOS channel includes: Reducing the traffic channel power of the first sub-channel user SFSACCH frame in part or all of the mapping period;

The traffic channel power of the second FSACCH frame of the second subchannel user in part or all of the mapping period is reduced.

Preferably, the first subchannel is a conventional VAMOS subchannel, and the second subchannel is a VAMOS subchannel that opens an offset SACCH mode;

The method further includes: monitoring an offset SACCH mode of the second subchannel, updating a value of the SFSACCH when the second subchannel changes its offset SACCH mode; lowering an updated SF of the first subchannel user Traffic channel power of the SACCH frame.

Preferably, in the process of reducing the traffic channel power, the degree of reducing the traffic channel power is determined according to the common VAMOS channel user power level, or is determined according to system simulation, or according to a radio resource management policy.

Preferably, the reducing the traffic channel power of the user of the VAMOS channel in the frame comprises: reducing a traffic channel power of the user of the VAMOS channel to 0 in the frame.

The invention provides a radio resource management device supporting VAMOS technology, which is located at a base transceiver station.

The RRC device is configured to: when a frame of a subchannel of a VAMOS channel is mapped with a traffic channel, and a same frame of another subchannel of the VAMOS channel is mapped with a SACCH channel, the user sharing the VAMOS channel is reduced Traffic channel power for this frame.

Preferably, the radio resource management apparatus is configured to: acquire some or all of the SACCH frame positions in the first subchannel, denoted as F _SACCH , and acquire some or all SACCH frame positions in the second subchannel, which are denoted as SFSACCH; Traffic channel power of a subchannel user SF _SACCH frame; reducing traffic channel power of a second subchannel user F _SACCH frame, the first subchannel and the second subchannel being two subchannels included in the VAMOS channel.

Preferably, the radio resource management device is configured to: Obtaining part or all of the SACCH frame positions in the first subchannel in one mapping period; acquiring some or all of the SACCH frame positions in the second subchannel in one mapping period;

The traffic channel power of the first subchannel user SF _SACCH frame in part or all of the mapping period is reduced; and the traffic channel power of the second subchannel user F _SACCH frame in part or all of the mapping period is reduced.

Preferably, the radio resource management device is further configured to: when the second subchannel is open offset

The VAMOS subchannel of the SACCH mode, when the first subchannel is another subchannel of the VAMOS channel, monitoring the offset SACCH mode of the second subchannel, and updating when the second subchannel changes its offset SACCH mode The value of the SF _SACCH ; the traffic channel power of the SFSACCH frame after the first subchannel user update is reduced.

Preferably, the radio resource management apparatus is configured to: according to the common VAMOS channel user power level, or according to a system simulation, or according to a radio resource management policy, the degree of reducing the traffic channel power.

Preferably, the RRC device is configured to: reduce the traffic channel power of the user in the frame to 0 by the VAMOS channel.

By the method of the present invention, the possible common VAMOS channel interference is reduced or even completely eliminated for the SACCH frame of the user of the VAMOS channel, and when the traffic channel power of the FSACCH or SFSACCH is reduced to 0, the SACCH channel of the frame can be modulated by GMSK. 100% maximum channel power transmission, which can guarantee the performance of SACCH, which brings about the enhancement of VAMOS network capacity. BRIEF abstract

Figure 1 is a schematic diagram of a VAMOS network using a conventional GSM frame structure;

2 is a schematic diagram of a VAMOS network using a shifted SACCH frame structure;

FIG. 3 is a flowchart of a method for managing a radio resource according to an embodiment of the present invention. Preferred embodiment of the invention

In the prior art, although the shifted SACCH can improve the SACCH performance by using the DTX time of another VAMOS subchannel user, the other subchannel user is in a traffic channel transmission state, and the radio channel condition is poor, such as away from the base station or In the shadow area of the signal, as shown in Figure 2, at the 6th frame, the ul's T is full power and there is no DTX. At this time, the SACCH of u3 is However, it will be subject to strong interference, which affects the transmission of user service signaling. The degradation of SACCH quality will inevitably lead to a decrease in network capacity. The shifted SACCH mode refers to a mode in which a SACCH frame of a VAMOS channel user (refer to a frame mapped with a SACCH channel) is mapped to an unconventional location.

The core idea of the present invention is: when one frame of a subchannel of a VAMOS channel is mapped with a traffic channel, and the same frame of another subchannel of the VAMOS channel is mapped with a SACCH channel, the user sharing the VAMOS channel is reduced in the frame. Traffic channel power.

Wherein, for one VAMOS channel, the traffic channel power of all frames simultaneously mapped with the traffic channel and the SACCH channel may be adjusted, or only the traffic channel power of a frame partially mapped with the traffic channel and the SACCH channel may be adjusted.

The VAMOS channel includes a first subchannel and a second subchannel, the first subchannel is a conventional VAMOS subchannel, and the second subchannel is a VAMOS subchannel in which the shifted SACCH mode is enabled; or, the first subchannel and the second subchannel are both turned on. The shifted SACCH mode is not limited in the present invention.

Obtaining part or all of the SACCH frame positions in the first subchannel, denoted as FSACCH, acquiring some or all SACCH frame positions in the second subchannel, denoted as SFSACCH; lowering the first subchannel user

The traffic channel power of the SFSACCH frame; the traffic channel power of the second FSACCH frame of the second subchannel user is reduced.

The radio resource management is performed by using the mapping period as a period, and only part or all of the SACCH frame positions in the first subchannel in one mapping period are obtained, which is recorded as FSACCH, and some or all SACCHs in the second subchannel in one mapping period are obtained. The frame position, denoted as SFSACCH; reduces the traffic channel power of the first sub-channel user SFSACCH frame in part or all of the mapping period; reduces the traffic channel power of the second sub-channel user FSACCH frame in part or all of the mapping period.

The degree of reducing the traffic channel power may be determined according to a common VAMOS channel user power level, or may be obtained by system simulation, or may be formulated by other Radio Resource Management (RRM) policies. An alternative is to adjust the traffic channel frame power to 0, that is, to close the frame traffic channel. In this way, the system capacity is enhanced by sacrificing a service frame in exchange for a quality-guaranteed SACCH channel.

Wherein, in the case that the second subchannel is a VAMOS subchannel in which the VAMOS user of the shifted SACCH mode is turned on, and the first subchannel is a VAMOS subchannel in which the shifted SACCH mode is not enabled, when the second subchannel Shifted SACCH mode is changed, the adjustment is performed. SFSACCH value, repeat In the above step, the traffic channel power of the SFSACCH frame after the update of the first subchannel user is reduced. The method control body is a Base Transceiver Station (BTS).

As shown in FIG. 3, the method for the radio resource management method of the present invention includes:

Step 301: The BTS detects that the second subchannel of a certain VAMOS channel is turned on.

SACCH mode;

Step 302: The BTS obtains a shifted SACCH mode of the second subchannel of the VAMOS channel, where the shifted SACCH mode moves the mapping position of the SACCH frame in a mapping period (including 26 frames) from the F SACCH frame to the frame. The SF SACCH frame, the mapping position of the traditional SACCH frame in one mapping period (including 26 frames) is recorded as FSACCH, and the values of FSACCH and SFSACCH are obtained; Step 303: The BTS lowers the second sub-channel user FSACCH frame of the VAMOS channel Traffic channel power;

Step 304: The BTS decreases the service channel power of the first SFSACCH frame of the first subchannel user of the VAMOS channel.

Step 305: The BTS monitors whether the changed SACCH mode of the second subchannel is changed, if yes, step 306 is performed, otherwise monitoring continues;

Step 306: The BTS updates the SFSACCH value according to the new shifted SACCH mode, and proceeds to the step.

304.

The method of the present invention reduces the interference to the SACCH channel and reduces the system performance by reducing the traffic channel power of the same frame mapped to the SACCH channel.

Industrial applicability

The method and device for supporting radio resource management of the multiplexed single-slot adaptive multi-user channel bearer voice service technology provided by the invention reduces the interference to the SACCH channel by reducing the traffic channel power mapped to the same frame of the SACCH channel, and improves System performance.

Claims

Claim

A radio resource management method supporting multiplexing of a single-slot adaptive multi-user channel bearer voice service, the method comprising: multiplexing a single-slot adaptive multi-user channel bearer voice service (VAMOS) channel When one frame of the channel is mapped with a traffic channel, and the same frame of another subchannel of the VAMOS channel is mapped with a slow associated control channel, that is, a SACCH channel, the traffic channel power of the user of the VAMOS channel is reduced.

2. The method of claim 1 wherein:

The VAMOS channel includes a first subchannel and a second subchannel;

The method further includes: acquiring some or all of the SACCH frame positions in the first subchannel,

F _SACCH , obtaining part or all of the SACCH frame positions in the second subchannel, denoted as SF _SACCH ; and reducing the traffic channel power of the user of the VAMOS channel in the frame includes: reducing the first subchannel user SF _SACCH frame Traffic channel power;

3. The method of claim 2, wherein:

And obtaining part or all of the SACCH frame positions in the first subchannel is to obtain a part or all of the SACCH frame positions in the first subchannel in one mapping period;

Obtaining part or all of the SACCH frame positions in the second subchannel is to obtain a part or all of the SACCH frame positions in the second subchannel in a mapping period; and the reducing the traffic channel power of the user in the frame in the common VAMOS channel includes: Reducing the traffic channel power of the first sub-channel user SFSACCH frame in part or all of the mapping period;

4. The method of claim 2, wherein:

The first subchannel is a traditional VAMOS subchannel, and the second subchannel is a VAMOS subchannel in which the offset SACCH mode is enabled; The method further includes: monitoring an offset SACCH mode of the second subchannel, updating a value of the SF _SACCH when the second subchannel changes its offset SACCH mode; and reducing an updated state of the first subchannel user Traffic channel power of the SF _SACCH frame.

5. The method of claim 1, 2, 3 or 4, wherein

In the process of reducing the power of the traffic channel,

The degree of reducing the traffic channel power is determined according to the common VAMOS channel user power level, or according to system simulation, or according to a radio resource management policy.

6. The method according to claim 1, 2, 3 or 4, wherein the reducing the traffic channel power of the user of the VAMOS channel in the frame comprises: reducing a traffic channel of the user of the VAMOS channel in the frame Power to 0.

7. A radio resource management apparatus supporting multiplexing single-slot adaptive multi-user channel bearer voice service (VAMOS) technology, located at a base transceiver station, wherein the radio resource management apparatus is set to be a sub-port of a VAMOS channel When one frame of the channel is mapped with a traffic channel, and the same frame of another subchannel of the VAMOS channel is mapped with a SACCH channel, the traffic channel power of the user of the VAMOS channel is reduced.

The radio resource management apparatus according to claim 7, wherein the radio resource management apparatus is configured to: acquire part or all of the SACCH frame positions in the first subchannel, denoted as F _SACCH , acquire part of the second subchannel or All SACCH frame positions, denoted as SF _SACCH ; reduce traffic channel power of the first subchannel user SF _SACCH frame; reduce traffic channel power of the second subchannel user F _SACCH frame, the first subchannel and the second sub The channel is the two subchannels included in the VAMOS channel.

The radio resource management apparatus according to claim 8, wherein the radio resource management apparatus is configured to:

Obtaining part or all of the SACCH frame positions in the first subchannel in one mapping period; acquiring some or all of the SACCH frame positions in the second subchannel in one mapping period;

10. The radio resource management apparatus according to claim 8, wherein the radio resource management apparatus is further configured to: when the second subchannel is a VAMOS subchannel of an off-track SACCH mode, the first sub-letter When the track is another subchannel of the VAMOS channel, the offset SACCH mode of the second subchannel is monitored, and when the second subchannel changes its offset SACCH mode, the value of the SF _SACCH is updated; lowering the first subchannel Traffic channel power of the SF _SACCH frame after the user is updated.

The radio resource management apparatus according to claim 7, 8, 9 or 10, wherein the radio resource management apparatus is configured to: according to the common VAMOS channel user power level, or according to system simulation, or according to radio resource management The strategy establishes the extent to which the traffic channel power is reduced.

The radio resource management apparatus according to claim 7, 8, 9, or 10, wherein the radio resource management apparatus is configured to: reduce a traffic channel power of the user of the VAMOS channel to 0 in the frame.