CN101150868A - A scrolling switching method of mobile station dominated mobile communication system based on MIMO technology - Google Patents
A scrolling switching method of mobile station dominated mobile communication system based on MIMO technology Download PDFInfo
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- CN101150868A CN101150868A CNA2007101772589A CN200710177258A CN101150868A CN 101150868 A CN101150868 A CN 101150868A CN A2007101772589 A CNA2007101772589 A CN A2007101772589A CN 200710177258 A CN200710177258 A CN 200710177258A CN 101150868 A CN101150868 A CN 101150868A
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Abstract
The invention relates to a scroll switching method in the mobile station leading mobile communications system utilizing the MIMO technology. A mobile station establishes a activation link with a plurality of base stations, the MIMO transmission is established. In the moving course of the mobile station, the course of scroll switching happens continually, the good quality waiting chosen links replace the activation link with quality which is lower than the threshold quality. The scroll switching process has two advantages: first, the scroll switching judgement reference is the detected service channel quality, namely, the quality of the upgoing or the downgoing service channels with quality which is lower than the threshold quality firstly, the scroll switching can be triggered, the talking quality before the switching and the cell edge are effectively ensured; second, the scroll switching substitutes one of activation links, has a little effect to all service data rate during switching, even the scroll switching is failure, the user data service is not interrupted. The scroll switching is especially suitable for the service with a high data rate.
Description
Technical field
The present invention relates to the changing method in a kind of mobile communication system, relate in particular to the scrolling switching method in leading (UEActive) mobile communication system of travelling carriage of a kind of MIMO of utilization technology.
Background technology
In traditional mobile communication system, traditional switching mode is the channel quality of the beacon channel of UE detection resources sub-district and Target cell, when the beacon channel quality of Target cell is better than cell-of-origin beacon channel quality, just starts handoff procedure.But beacon channel and Traffic Channel are incoherent often, and the quality that is to say beacon channel can not be represented the quality of Traffic Channel.As the basis for estimation of switching, the communication quality decline of cell edge and the reduction of handover success rate have just been caused with the beacon channel quality.
The core concept of MIMO technology is the space-time Combined Treatment of signal, and the Spatial Dimension that the time dimension that digital signal is intrinsic and a plurality of apart antenna bring is joined together.The key character of mimo system is that it can utilize the multipath transmisstion characteristic of radio communication to improve the performance of system.That is to say that the MIMO technology can effectively utilize the random fading in the Radio Link and postpone extended attribute and improve the speed or the reliability of transmission exponentially.In mimo system, binary data stream is launched by transmitting antenna behind the mapping process by chnnel coding, modulation, and different mapping modes will produce the symbols streams of varying number, and different then symbols streams is sent on the different antennas and sends.Mapping can be the linear space weighting of antenna element, also can be linear Space Time Coding.Then, through after up-conversion, shaping filter and the power amplification, symbol is sent in the spacing wireless link.Utilize one or more antennas to receive the signal that sends at receiving terminal, after demodulation, inverse mapping, recover original information then.Concrete coding method can freely be selected according to different application purposes with mapping algorithm.
Signal in the mimo system on a plurality of antennas is optimised processing in bigger space, and the extra degree of freedom is provided.That is to say that the signal coherence on the different antennae tuple merges the array gain that brings, mimo system can also provide and send and the receive diversity gain.
Data are transmitted in the channel of the channel of matrix form rather than vector form in the mimo system, and therefore except that diversity and array gain benefit, mimo system also brings the increase of power system capacity.The mimo system model as shown in Figure 1, n wherein
tThe signal of individual transmission antennas transmit is by n
rIndividual reception antenna receives, to produce the effect of transmit diversity and receive diversity.
Summary of the invention
The object of the invention is to provide the scrolling switching method in a kind of UEActive mobile communication system of the MIMO of utilization technology.
Scrolling switching method in a kind of UEActive mobile communication system of utilizing the MIMO technology of the present invention comprises the following steps:
Step 1, mobile station UE are monitored SIR and BER from the downlink traffic channel of all a plurality of base stations that are connected with this UE;
Step 6, UE disturb perception to available uplink random access channel;
Step 7, UE select a uplink random access channel to send inquiry information in the base station towards periphery;
Step 8, peripheral base station are received UE inquiry information, and wherein the base station that does not connect with UE wherein comprises the identity code and the load condition of base station to UE echo reply information;
Step 9, UE will rank according to signal quality SIR with the peripheral base station response message that UE does not connect, and the selection signal quality is good and have another base station of load surplus to insert, and sends connection request;
After the connection request of UE is received in step 10, this another base station,, send the connection confirmation to UE for the connection of UE is got ready;
After step 11, UE receive the connection confirmation of this another base station, send carrying to this another base station and set up solicited message;
Bearing link is set up after receiving that solicited message is set up in carrying in step 12, this another base station, and beams back carrying to UE and set up confirmation;
Step 13, this another base station are to the message that base station controller is reported and UE connects, and base station controller order former base station disconnection and UE are connected;
Step 14, UE disconnection are connected with former base station, and the beginning transmission of the data between another base station therewith;
Being connected between step 15, UE and all the other base stations remains unchanged;
Step 16, the switching of rolling are finished.
Another kind of the present invention utilizes the scrolling switching method in the UEActive mobile communication system of MIMO technology, comprises the following steps:
Step 1, mobile station UE are monitored SIR and BER from the downlink traffic channel of all base stations that are connected with this UE;
Step 6, UE disturb perception to available uplink random access channel;
Step 7, UE select a uplink random access channel to send inquiry information in the base station towards periphery;
Step 8, peripheral base station are received UE inquiry information, and wherein the base station that does not connect with UE wherein comprises the identity code and the load condition of base station to UE echo reply information;
Step 9, UE will rank according to signal quality SIR with the peripheral base station response message that UE does not connect, and the selection signal quality is good and have another base station of load surplus to insert, and sends connection request;
After the connection request of UE is received in step 10, this another base station,, send the connection confirmation to UE for the connection of UE is got ready;
After step 11, UE receive the connection confirmation of this another base station, send carrying to this another base station and set up solicited message;
Bearing link is set up after receiving that solicited message is set up in carrying in step 12, this another base station, and beams back carrying to UE and set up confirmation;
Step 13, this another base station are to the message that base station controller is reported and UE connects, and base station controller order former base station disconnection and UE are connected;
Step 14, UE disconnection are connected with former base station, and the beginning transmission of the data between another base station therewith;
Being connected between step 15, UE and all the other base stations remains unchanged;
Step 16, the switching of rolling are finished.
At first introduce leading (UEActive) mobile communication system of the travelling carriage that adopts the inventive method.The feature of leading (UEActive) mobile communication system of travelling carriage is, there is not down control channel such as pilot transmitted and broadcast channel always, when the travelling carriage Request System is served, system inserts website accordingly can utilize smart antenna emission pilot tone and system information, reduce system interference, improved system effectiveness.Travelling carriage need not all switch through all cellular cells when mobile, reduces the number of times that switches.Break the restriction of honeycomb, the base station can make full use of the power resource of oneself.Also reduced restriction to base station selection.Travelling carriage can select the base station of resource affluence to insert, and reduces potential switching times on the one hand, reduces the idle amount of base station resource, improves resource utilization.Balance sysmte is loaded on the other hand.The pond, base station is formed in the base station, carries out sharing of base station resource, utilizes a plurality of antenna mutual group at many stylobates station to become antenna array, is equivalent to utilize bigger MIMO battle array, improves traffic rate, thereby improves power system capacity.
Adopt leading (UEActive) mobile communication system of travelling carriage of the present invention to comprise:
Travelling carriage also is user equipment (UE), comprises making a call and two kinds of uses of quilt calling situations.When Mobile Origination is called out, at first cover its base station by system's common uplink access channel inquiry, after receiving response message, the answer signal signal to noise ratio that receives is ranked, allow under the situation of user's access at the base station load, the base station of selected signal to noise ratio maximum is inserted, and this process is called access procedure.When mobile terminated the time, by paging base station travelling carriage is carried out paging, when travelling carriage is received the beep-page message of oneself, enter access procedure, in access procedure, the selected base station that connects, after the access,, be ready to converse with the calling subscriber to the position of System Reports oneself;
The base station is connected with core net by base station controller, and function is to receive the information of travelling carriage in the overlay area and send information to travelling carriage.Its overlay area can be overlapping.When receiving the access apply for information of travelling carriage, show that this travelling carriage is in the overlay area of oneself, replys travelling carriage at the common uplink access channel.Response message comprises the identity code and the load condition of base station;
Paging base station links to each other with core net by base station controller, on paging channel travelling carriage is not carried out paging when knowing the particular location of called mobile station in system.When system need be to intrasystem travelling carriage broadcast message, paging base station was born the work that sends broadcast message to travelling carriage.Leading (UEActive) mobile communication system structure of travelling carriage as shown in Figure 2.
The present invention is suitable for utilizing leading (UEActive) mobile communication system of the travelling carriage of MIMO technology, and scrolling switching method provided by the invention not only effectively reduces handover failure rate, and when keeping switching communication quality steadily.
The present invention proposes a kind of scrolling switching method in leading (UEActive) mobile communication system of the travelling carriage that utilizes the MIMO technology.In leading (UEActive) mobile communication system of the travelling carriage that uses the MIMO technology, set up the contact of MIMO link between mobile station UE and many stylobates station.As shown in Figure 3.Link between base station 1,2,3,4 and the UE has been formed 4 * 1MIMO link jointly.Along with moving of UE, the quality of these 4 links is also changing.UE is the quality of these 4 down links of real time monitoring respectively, and 4 base stations are distinguished the uplink quality of real time monitoring from UE separately.When the quality of arbitrary up link or down link drops to handoff threshold when following, just start the process of rolling and switching.
Scrolling switching method in leading (UEActive) mobile communication system of the travelling carriage of the MIMO of utilization technology of the present invention is cooperated by system side and UE side to be finished.Detection according to up link or downlink quality decline can be divided into two kinds of situations.
First kind of situation, when the quality of arbitrary up link at first drops under the handoff threshold, starting rolls switches.For example, a plurality of base stations such as base station 1, base station 2, base station 3, base station 4 and UE set up under the situation of active link, and wherein base station 1 monitoring at first drops under the handoff threshold from the uplink quality of UE.After base station 1 monitors this incident, notify UE to switch on the one hand, the base station controller in the reporting system performs to switch and prepares on the other hand.The notice of the 1 couple of UE in base station is to be undertaken by the down link between base station 1 and the UE.After UE received the notice of base station 1, it was good and as yet not and set up other base stations of active link between the UE to begin to seek the ambient signals quality.UE sends the information of seeking the measured base station of ambient signals matter by the uplink random access channel, after this information is received in those base stations of not setting up active link with UE as yet, replys identity code and the load condition of oneself to UE.UE sets up active link according to the quality of answer signal and the load decision of each base station with which base station.For example, link is set up in UE decision and base station 5, then substitutes the link of base station 1 with the link of base station 5.Simultaneously, set up active link between base station 5 informing base station controllers oneself and the UE.Active link between 1 release of base station controller informing base station and the UE.Base station controller changes the data that originally send to UE by base station 1 into and is sent to base station 5.UE changes the data that originally were sent to base station 1 into and is sent to base station 5.
Second kind of situation, when the quality of arbitrary down link at first drops under the handoff threshold, starting rolls switches.For example, a plurality of base stations such as base station 1, base station 2, base station 3, base station 4 and UE set up under the situation of active link, and the UE monitoring at first drops under the handoff threshold from the downlink quality of base station 1.After UE monitors this incident, on the one hand report to base station 1, on the other hand, it is good and as yet not and set up other base stations of active link between the UE that UE begins to seek quality on every side.UE sends the information of seeking the measured base station of ambient signals matter by the uplink random access channel, after this information is received in those base stations of not setting up active link with UE as yet, replys identity code and the load condition of oneself to UE.UE sets up link according to the quality of answer signal and load decision and which base station of each base station.For example, link is set up in UE decision and base station 5.So just substitute the link of base station 1 with the link of base station 5.Simultaneously, set up active link between base station 5 informing base station controllers oneself and the UE.Active link between 1 release of base station controller informing base station and the UE.Base station controller changes the data that originally send to UE by base station 1 into and is sent to base station 5.UE changes the data that originally were sent to base station 1 into and is sent to base station 5.
In the scrolling switching method of the present invention, no matter be that the up link or the quality of down link are judged, all with the technical indicator of reflection Traffic Channel quality as monitoring criteria, for example adopt the signal to noise ratio SIR of Traffic Channel or bit error rate BER as monitoring criteria, when above-mentioned technical indicator is lower than predetermined threshold, then start handoff procedure.
Scrolling switching method of the present invention has two features with advantage:
The first, the judgement foundation of switching of rolling is the Traffic Channel quality that detects.No matter the quality of reverse link traffic channel or downlink traffic channel at first drops under the rolling handoff threshold, can trigger the process of rolling and switching.So just can guarantee cell edge effectively and switch speech quality before.Such switching is necessary and reliable.
The second, roll and switch a link that once only substitutes in many active links.In the service outage duration in handoff procedure, less to the influence of total traffic data rate.Even the rolling handoff failure also can not cause the interruption of user data service, this method is particularly useful for the business of high data rate.
Description of drawings
Fig. 1 is mimo system basic principle figure;
Fig. 2 is the general construction schematic diagram that utilizes leading (UEActive) mobile communication system of travelling carriage of MIMO technology;
Fig. 3 is the schematic diagram that utilizes many active links of setting up between the mobile station UE and base station in leading (UEActive) mobile communication system of travelling carriage of MIMO technology;
Fig. 4 utilizes the schematic diagram that rolls and switch between the mobile station UE and base station in leading (UEActive) mobile communication system of travelling carriage of MIMO technology.
Embodiment
Below in conjunction with accompanying drawing, introduce the travelling carriage of the MIMO of utilization technology of the present invention in detail and dominate scrolling switching method in (UEActive) mobile communication system.
Figure 4 shows that rolls switches the situation of front and back MIMO link.In Fig. 4, being connected before the representative of the link of UE and 1 of base station is rolled and switched represented with doublet; Being connected after the link representative of UE and 5 of base stations is rolled and switched, represent with double dot dash line; The link that UE and base station are 2,3,4 is represented with double solid line carrying out not having variation before and after the rolling switching of the present invention.
Rolling shown in Figure 4 is switched, and being descended by the uplink traffic channel quality causing that the switching of rolling comprises following concrete steps:
Step 1, mobile station UE are monitored the SIR and the BER of all downlink traffic channels;
Step 6, UE disturb perception to available uplink random access channel;
Step 7, UE select a uplink random access channel to send inquiry information in the base station towards periphery;
Step 8, peripheral base station are received UE inquiry information, and wherein the base station that does not connect with UE wherein comprises the identity code and the load condition of base station to UE echo reply information;
Step 9, UE will rank according to signal quality SIR with the peripheral base station response message that UE does not connect, and the selection signal quality is good and have the base station 5 of load surplus to insert, and sends connection request;
After the connection request of UE is received in step 10, base station 5,, send the connection confirmation to UE for the connection of UE is got ready;
After step 11, UE receive the connection confirmation of base station 5, send carrying to base station 5 and set up solicited message;
Bearing link is set up after receiving that solicited message is set up in carrying in step 12, base station 5, and beams back carrying to UE and set up confirmation;
Step 13, base station 5 are to the message that base station controller is reported and UE connects, and 1 disconnection of base station controller order base station and UE are connected;
Step 14, UE disconnection are connected with base station 1, and the data between beginning and the base station 5 transmit;
Being connected between step 15, UE and all the other base stations 2,3,4 remains unchanged;
Step 16, the switching of rolling are finished.
Rolling shown in Figure 4 is switched, and being descended by the downlink traffic channel quality causing that the switching of rolling comprises following concrete steps:
Step 1, mobile station UE are monitored the SIR and the BER of all downlink traffic channels;
Step 6, UE disturb perception to available uplink random access channel;
Step 7, UE select a uplink random access channel to send inquiry information in the base station towards periphery;
Step 8, peripheral base station are received UE inquiry information, and wherein the base station that does not connect with UE wherein comprises the identity code and the load condition of base station to UE echo reply information;
Step 9, UE will rank according to signal quality SIR with the peripheral base station response message that UE does not connect, and the selection signal quality is good and have the base station 5 of load surplus to insert, and sends connection request;
After the connection request of UE is received in step 10, base station 5,, send the connection confirmation to UE for the connection of UE is got ready;
After step 11, UE receive the connection confirmation of base station 5, send carrying to base station 5 and set up solicited message;
Bearing link is set up after receiving that solicited message is set up in carrying in step 12, base station 5, and beams back carrying to UE and set up confirmation;
Step 13, base station 5 are to the message that base station controller is reported and UE connects, and 1 disconnection of base station controller order base station and UE are connected;
Step 14, UE disconnection are connected with base station 1, and the data between beginning and the base station 5 transmit;
Being connected between step 15, UE and all the other base stations 2,3,4 remains unchanged;
Step 16, the switching of rolling are finished.
Should be noted that all any improved methods that does not break away from inventive concept all belong to protection scope of the present invention, the concrete protection range of the present invention is defined by the claims.
Claims (2)
1. the scrolling switching method in the leading mobile communication system of the travelling carriage that utilizes the MIMO technology comprises the following steps:
Step 1, mobile station UE are monitored SIR and BER from the downlink traffic channel of all a plurality of base stations that are connected with this UE;
Step 2, a plurality of base stations that all are connected with this UE are monitored SIR and BER from the uplink traffic channel of UE separately;
Step 3, a base station at first monitor incident A: drop under the rolling handoff threshold SIRuplink_target or the BER of uplink traffic channel drops under the rolling handoff threshold BERuplink_target from the SIR of the uplink traffic channel of UE;
Step 4, this base station report base station controller to incident A, and the link that the informing base station controller switches for rolling substitutes ready;
Step 5, this base station are notified UE incident A by down link;
Step 6, UE disturb perception to available uplink random access channel;
Step 7, UE select a uplink random access channel to send inquiry information in the base station towards periphery;
Step 8, peripheral base station are received UE inquiry information, and wherein the base station that does not connect with UE wherein comprises the identity code and the load condition of base station to UE echo reply information;
Step 9, UE will rank according to signal quality SIR with the peripheral base station response message that UE does not connect, and the selection signal quality is good and have another base station of load surplus to insert, and sends connection request;
After the connection request of UE is received in step 10, this another base station,, send the connection confirmation to UE for the connection of UE is got ready;
After step 11, UE receive the connection confirmation of this another base station, send carrying to this another base station and set up solicited message;
Bearing link is set up after receiving that solicited message is set up in carrying in step 12, this another base station, and beams back carrying to UE and set up confirmation;
Step 13, this another base station are to the message that base station controller is reported and UE connects, and base station controller order former base station disconnection and UE are connected;
Step 14, UE disconnection are connected with former base station, and the beginning transmission of the data between another base station therewith;
Being connected between step 15, UE and all the other base stations remains unchanged;
Step 16, the switching of rolling are finished.
2. the scrolling switching method in the leading mobile communication system of the travelling carriage that utilizes the MIMO technology comprises the following steps:
Step 1, mobile station UE are monitored SIR and BER from the downlink traffic channel of all base stations that are connected with this UE;
Step 2, a plurality of base stations that all are connected with this UE are monitored SIR and BER from the uplink traffic channel of UE separately;
Step 3, UE at first monitor incident B: drop under the rolling handoff threshold SIRdownlink_target or the BER of downlink traffic channel drops under the rolling handoff threshold BERdownlink_target from the SIR of the downlink traffic channel of a base station;
Step 4, UE report this base station to incident B by up link;
Step 5, this base station report base station controller to incident B, and the link that the informing base station controller switches for rolling substitutes ready;
Step 6, UE disturb perception to available uplink random access channel;
Step 7, UE select a uplink random access channel to send inquiry information in the base station towards periphery;
Step 8, peripheral base station are received UE inquiry information, and wherein the base station that does not connect with UE wherein comprises the identity code and the load condition of base station to UE echo reply information;
Step 9, UE will rank according to signal quality SIR with the peripheral base station response message that UE does not connect, and the selection signal quality is good and have another base station of load surplus to insert, and sends connection request;
After the connection request of UE is received in step 10, this another base station,, send the connection confirmation to UE for the connection of UE is got ready;
After step 11, UE receive the connection confirmation of this another base station, send carrying to this another base station and set up solicited message;
Bearing link is set up after receiving that solicited message is set up in carrying in step 12, this another base station, and beams back carrying to UE and set up confirmation;
Step 13, this another base station are to the message that base station controller is reported and UE connects, and base station controller order former base station disconnection and UE are connected;
Step 14, UE disconnection are connected with former base station, and the beginning transmission of the data between another base station therewith;
Being connected between step 15, UE and all the other base stations remains unchanged;
Step 16, the switching of rolling are finished.
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| CNB2007101772589A CN100562176C (en) | 2007-11-13 | 2007-11-13 | A kind of MIMO technology travelling carriage that utilizes is dominated changing method in the mobile communication system |
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| CNB2007101772589A CN100562176C (en) | 2007-11-13 | 2007-11-13 | A kind of MIMO technology travelling carriage that utilizes is dominated changing method in the mobile communication system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010020063A1 (en) * | 2008-08-18 | 2010-02-25 | 上海贝尔股份有限公司 | Method and device for realizing grouping in multi-input multi-output transmission with multiple-sector coordination |
| CN102006627A (en) * | 2010-11-01 | 2011-04-06 | 中国电信股份有限公司 | Wireless local area network (WLAN) switching method and system |
| CN102457943A (en) * | 2010-10-18 | 2012-05-16 | 普天信息技术研究院有限公司 | Random access method |
| CN105722147A (en) * | 2014-12-04 | 2016-06-29 | 中国移动通信集团公司 | Core network load balancing method, base stations, base station pools and core network |
| CN103957552B (en) * | 2014-05-13 | 2017-05-31 | 江苏省无线电科学研究所有限公司 | The method for improving data communication reliability in automatic weather station |
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| CN100403841C (en) * | 2004-05-28 | 2008-07-16 | 华为技术有限公司 | Method for regulating user equipment active set dynamically |
| CN100389632C (en) * | 2004-11-24 | 2008-05-21 | 华为技术有限公司 | Wireless access network system and soft switching method thereof |
| CN100456871C (en) * | 2007-03-22 | 2009-01-28 | 北京交通大学 | Mobile communication system based on OFDM and channel switching distribution method |
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- 2007-11-13 CN CNB2007101772589A patent/CN100562176C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010020063A1 (en) * | 2008-08-18 | 2010-02-25 | 上海贝尔股份有限公司 | Method and device for realizing grouping in multi-input multi-output transmission with multiple-sector coordination |
| CN102017459A (en) * | 2008-08-18 | 2011-04-13 | 上海贝尔股份有限公司 | Method and device for realizing grouping in multi-input multi-output transmission with multiple-sector coordination |
| CN102017459B (en) * | 2008-08-18 | 2014-04-16 | 上海贝尔股份有限公司 | Method and device for realizing grouping in multi-input multi-output transmission with multiple-sector coordination |
| US8718035B2 (en) | 2008-08-18 | 2014-05-06 | Alcatel Lucent | Method and device for realizing grouping in multi-input multi-output transmission with multiple-sector coordination |
| CN102457943A (en) * | 2010-10-18 | 2012-05-16 | 普天信息技术研究院有限公司 | Random access method |
| CN102006627A (en) * | 2010-11-01 | 2011-04-06 | 中国电信股份有限公司 | Wireless local area network (WLAN) switching method and system |
| CN102006627B (en) * | 2010-11-01 | 2013-04-17 | 中国电信股份有限公司 | Wireless local area network (WLAN) switching method and system |
| CN103957552B (en) * | 2014-05-13 | 2017-05-31 | 江苏省无线电科学研究所有限公司 | The method for improving data communication reliability in automatic weather station |
| CN105722147A (en) * | 2014-12-04 | 2016-06-29 | 中国移动通信集团公司 | Core network load balancing method, base stations, base station pools and core network |
| CN105722147B (en) * | 2014-12-04 | 2019-08-13 | 中国移动通信集团公司 | Core network load equalization methods, base station, base station pond and core net |
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| CN100562176C (en) | 2009-11-18 |
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