CN107104705A - The method to set up of GSM - Google Patents

Abstract

The invention provides a kind of method to set up of GSM, wherein system includes multiple wireless base stations, and this method includes：Measure the quality of reception of the reference signal from multiple wireless base stations；Second wireless base station is notified by the first wireless base station, including from the first information of one in the quality of reception notified that mobile station is notified and the information for the candidate for performing coordinating multiple points communication, the multiple wireless base station passes through by the second base station；Mobile station is asked to notify the propagation path information between movement station and multiple wireless base station candidates before switching is completed；And notify propagation path information to the second wireless base station.

Description

The method to set up of GSM

Technical field

The present invention relates generally to the establishing method of GSM for wireless communication field.

Background technology

The technology of cellular mobile telecommunication system is transferred to Long Term Evolution from Universal Mobile Telecommunications System (UMTS) (LTE).LTE carries out downlink and upper using OFDM (OFDM) and single-carrier frequency division multiple access (SC-FDMA) technology Row wireless access, realizes high-speed radio packet communication, and down peak magnitude transmission rate is more than 100Mb/s, upstream peak transmission speed Rate is more than 50Mb/s.International Organization for standardization's third generation partner program (3GPP) has had been started up the movement based on LTE Communication system LTE-A (LTE-Advanced) is studied, to realize faster communication.LTE-A aims at 1Gb/s downlink The uplink peak transmission rate of hardware circuit solution and 500Mb/s, and it has been directed to radio access scheme, the network architecture Etc. checked various new technologies (non-patent literature 1).

3GPP is studying coordinating multiple points (CoMP) communication plan for LTE-A.For downlink CoMP communication, Through considering such as joint transmission, coordinating beam forming, the technology that coordinated scheduling and fast cell are selected.

Hereinafter, reference picture 1 is described into joint transmission, coordinates the basic conception of Wave beam forming and coordinated scheduling.Under In the description in face, term " cell " is used for each geology scope for representing that wireless base station provides wireless service, and it can be with For a part for the communication function for representing to be managed by wireless base station, for being led in the range of each geology with user equipment Letter.As shown in figure 1, serving cell is the sale with mobile station UE exchange of control information.Cooperation cell is to use CoMP communication skill The cell that art (i.e. there is provided coordinating communication) is communicated together with serving cell with mobile station UE.

The content of the invention

The invention provides a kind of method to set up for GSM, the wherein system includes multiple wireless bases Stand, this method includes：The quality of reception of the reference signal from multiple wireless base stations is measured, including：First wireless base station and with The second adjacent wireless base station of first wireless base station, and in response to movement station from the first wireless base station to the second wireless base station The detection of switching, the quality of reception of the quality of reception base station when coordinating multiple points communicate is notified to the first wireless base station；By the first nothing Line base station notifies the second wireless base station, including from the first information of one in the quality of reception notified that mobile station is notified with And the information of the candidate of coordinating multiple points communication is performed, the multiple wireless base station passes through by the second base station；Request mobile station is being cut Change the propagation path information between notice movement station and multiple wireless base station candidates before completing；And notified to the second wireless base station Propagation path information.

Brief description of the drawings

With reference to the described and claimed in more detail below with reference to accompanying drawing, advantages and features of the invention will become more preferable Ground understands, wherein similar element is with similar symbol logo, and wherein：

Fig. 1 is a series of instance graph of the sequences for the CoMP setting programs for representing that mobile station switching is front and rear.

Fig. 2 be represent in first embodiment mobile station switching before and after CoMP setting processings a series of sequences reality Illustration.

Embodiment

Presented according to its preferred embodiment for the best mode embodiment of the present invention.However, the invention is not restricted to described Embodiment, it is of the invention to be permitted and it will be understood by those skilled in the art that in the case of without departing from the basic conception of the present invention Many other embodiments are possible, and any such work will also fall into the scope of the present invention.It is envisioned that the present invention Other patterns and configuration can be readily incorporated into the teachings of the present invention, and for clear and disclosed purpose rather than in order to Scope is limited, a particular configuration is only shown and describe.

Term " one " herein does not indicate that the limitation of quantity, but represents depositing for one or more cited projects .

Here, the CoMP setting up procedure of (HO) is a series of before and after switching figure 1 illustrates user equipment (UE) The example of sequence.In the order shown in Fig. 1, as shown in figure 1, as an example, when by joint transmission in CoMP communication When sending data to user equipment (UE) in technology, user equipment (UE) is switched over.More specifically, it is switched in user equipment (UE) Before, source enode b (source eNB) and cooperation enode b (cooperation eNB) send data to user equipment (UE)；After the handover, Target eNode B (target eNB manages the wireless evolution node B of new demand servicing cell) and cooperation enode b (cooperation eNB) Data are sent to user equipment (UE).Here, " synergistic evolution node B " (cooperation eNB) refers to manage the wireless of cooperation district term Enode b, and while being cooperated with the wireless evolution node B with management service cell, cell is provided to user equipment Between coordinating communication.

In the sequence, before switching (HO), after CoMP setting up procedure (step S10 to S16) is performed, source evolution Node B (source eNB) and its cooperation enode b (cooperation eNB) perform coordinating communication coordinating transmissions in this case) arrive user Equipment UE (step S18).In response to the switching (step S20) of the user equipment (UE) detected, terminate the coordination being carrying out and lead to Believe (step S21), and perform a series of handoff procedures (step S20 to S28).Once handoff procedure is completed, via target evolution Node B (target eNB) sends data (step S30) to user equipment (UE).Hereafter, target eNB is walked from execution CoMP settings are started Suddenly (step S40 and its subsequent step).

In the order shown in Fig. 1, as shown in figure 1, do not perform CoMP setting processings during hand-off process, target eNB CoMP setting processings are performed since switching.That is, CoMP setting up procedure is not carried out in handoff procedure, therefore After switching coordinating communication start be delayed by, this may cause reduction communication quality or handling capacity.

(1) first embodiment, first embodiment explained below.

The summary of CoMP setting procedure in (1-1) present embodiment

First, the summary to the CoMP setting procedure in the GSM of present embodiment is illustrated.

In the GSM of the present embodiment, as shown in Figure 1.As shown in figure 1, when multiple cell coordination with one another, Communicated for user equipment.For example, perform coordinating transmissions, plurality of wireless evolution node B (hereinafter referred to as " eNB ") that This cooperates with being sent to user equipment.When being switched over when user equipment is performing coordinating transmissions to user equipment, Ke Yigeng The cell newly coordinated with user equipment, and stop the coordinating transmissions before switching.However, ought be opened after the handover has been accomplished from it When beginning to perform CoMP setting up procedure, the recovery of coordinating transmissions may be delayed by.Therefore, in the present embodiment, in a repetitive fashion CoMP setting up procedure is performed during handoff procedure.In other words, in the present embodiment, when in the coordination biography to the user equipment When defeated period detects the switching of user equipment, at least the one of the CoMP setting up procedure of above-mentioned processing (i) to (vi) can be included Part is performed before switching is completed, to recover the coordinating transmissions of user equipment earlier after the handover.

Before handover, the user equipment of the present embodiment periodically receives the reference letter of the enode b from surrounding Number to obtain signal measurement result (for example, RSRP), and notify enode b (that is, the result of source enode b (source eNB)). Switching in response to detecting user equipment, source enode b (the first wireless base station) by developing communication link immediately Target eNode B (the second wireless base station) is notified to be used for the first information node B for performing coordinating communication.The first information includes working as Detect small from the signal measurement result from peripheral cell of notification of user equipment or the coordination based on result identification during switching Area candidate.Above-mentioned technology, i.e., using equation (1) or formula (2), for example, can apply to the skill for the cell candidate that identification is coordinated Art.

In the sequence shown in Fig. 1, as shown in figure 1, in order to perform CoMP setting up procedure after the completion of the handover procedure, association Make cell candidates to be recognized by the enode b as switching target.On the contrary, in the present embodiment, before handoff procedure is completed, Serving cell (hereinafter referred to as " Target cell ") and its cooperation of the user equipment after switching can be recognized in the enode b of source Cell.In this identification technology, if by equation (1), for example, can be calculated relative to the reference signal from object element P.sub.0 is used as RSRP values.More specifically, when detecting the switching of user equipment, Target cell is included in the small of surrounding Qu Zhong, wherein signal measurement result by from notification of user equipment to source enode b therefore, cell candidates switching after target The coordination cell (hereinafter referred to as " cooperation cell candidate ") of cell can be recognized by source enode b.

In addition, in this embodiment, it is preferred that, before the handoff procedure of user equipment is completed, in CoMP setting up procedure Period performs above-mentioned processing (iii).It is highly preferred that before the handoff procedure of user equipment is completed, in the CoMP setting up procedure phases Between perform above-mentioned processing (iii) and (iv).It is highly preferred that before the handoff procedure of user equipment is completed, being set in CoMP Above-mentioned processing (iii) to (v) is performed during journey.

(1-2) specific CoMP setting procedure

Then, before and after user equipment reference picture 1 described in the GSM of first embodiment switches CoMP setting up procedure.Fig. 2.Fig. 2 is to represent the CoMP setting processings (communication before and after the user's set switching in first embodiment Establishing method) a series of sequences the figure of one.Hereinafter, (1) differentiates description coordinating cell waits as an example The technology of choosing.

Shown in Fig. 2, step S10~S18 represents the CoMP setting procedure in the user's set UE before switching.First, source Enode b (source eNB) sends peripheral cell measurement request message to user equipment (UE).In response to the request, user equipment (UE) The RSRP of the reference signal from peripheral cell is measured, and measurement result (step S10) is notified to source enode b.Note, survey Amount result is also used for determining whether user equipment (UE) has switched (that is, the detection of switching) by source enode b.

Source enode b recognizes user equipment (UE) based on the measurement result notified using the technology represented by equation 1 Serving cell and cooperation cell candidate.(1).Source enode b (is assisted to the cooperation enode b cooperated with source enode b Make eNB) coordinating communication request message is sent, and receive the response (step S12) for request from each enode b.Hereafter, Source enode b sends request measurement CSI CSI request message to user equipment (UE), is used as each cooperation cell candidate and use Propagation path information between the equipment UE of family, and receive measurement result (step in CSI report message from user equipment (UE) S14).Source enode b can based on the CSI measurement results with each cooperation cell candidate notified from user equipment (UE) come Recognize the serving cell in the candidate of cooperation cell and cooperation cell.

For example in some non-patent literatures, a kind of technology that cooperation cell is recognized from the candidate of cooperation cell is described, It is incorporated herein by reference.Hereinafter, the technology described in bibliography is summarized.

As an example, it is the downlink from serving cell respectively to work as Hsub.11, Hsub.12 and H.sub.13 Signal and two cooperation cell candidates are to the CSI of user equipment (UE), and W.sub.11, W.sub.12 and W.sub.13 are bases The pre-coding matrix that H.sub.11, H.sub.12 and H.sub.13 are set, the CSI under coordinating communication in three batteries, H.sub.0, is represented by following equation (5).Here, it is small by servicing when meeting the message capacity ratio calculated based on H.sub.0 During the condition for the three times higher above of message capacity that the CSI in area is calculated (H.sub.11), the coordinating transmissions of three cells are preferably provided. Thus, for example, the cell candidates that can coordinate more than three meet two cells of above-mentioned condition to recognize.Equation (5) is H.sub.0=H.sub.11W.sub.11+H.sub.12W.12+C.13.13W.13 (5)

Once coordinate cell to be identified, then source enode b by the enode b that is such as embodied by X2 interface it Between communication link send CoMP information to the enode b of cooperation, and receive confirmation signal (step S16).CoMP information Content can be changed according to specific CoMP communication technology.In the case where CoMP communication technology is joint transmission, for example Including transmitting data, propagation path information, schedule information, precoding configuration information etc..Hereafter, source enode b and its collaboration Enode b performs the coordinating transmissions (step S18) of data-signal (data) to user equipment (UE).

Then, examined in response to the RSRP of the reference signal from peripheral cell based on user equipment (UE) measurement result Switching is surveyed, source enode b sends HO request messages switching (target eNB) to the evolution node B as target, and reception should The confirmation signal (HO asks Ack) (step S20) of request.Here, HO request messages are generated, to include coming in step slo From the peripheral cell measurement result of the user equipment (UE) of source enode b (newest knot during switching is detected as the first information Really) or on the information of the coordination cell candidate recognized using peripheral cell measurement result.This helps speed up target evolution The processing of CoMP setting up procedure in node B.

Source enode b also asks (CSI request) user equipment (UE) measurement CSI to be set as each cooperation cell candidate and user Propagation path information between standby UE, when the peripheral cell of user equipment (UE) or cooperation cell candidate have been determined.The request It is included in radio resource control (RRC) reconfiguration message (RRC is reconfigured) sent in step S22.Note, in this reality Apply in example, for example, by adding CSI request, being included within standard of the information element (IE) in RRC reconfiguration messages from LTE Extension.By this way, by the way that the CSI request from source enode b is sent into user equipment (UE) come instead of target evolution Node B, can simplify the communication process between source enode b and target eNode B, and target eNode B can be with CSI measurement results are obtained from user equipment (UE) early stage.This helps speed up CoMP setting up procedure.

In step s 24, user equipment (UE) is set up and target evolution section using uplink random access channel (RACH) Point B communication.For example, in response to HO request messages, when target evolution node B distributes special RACH access to user equipment (UE) Gap, and notify to user equipment (UE) distributed access slot.When with the disconnection of the link of source enode b, user equipment (UE) Special RACH is sent using the access slot of distribution, and performs the processing for setting up communication link with target eNode B.

Once establishing the communication with target eNode B, user equipment (UE) sends RRC to target eNode B and matched somebody with somebody again Put completion message (" RRC reconfigures completion ") (step S26).Now, user equipment (UE) in step S22 in response to receiving CSI request, measure the CSI with cooperation cell candidate, user equipment (UE) reconfigures completion message in RRC includes measurement As a result (CSI report).Note, in the present embodiment, for example, by adding CSI report, being included in RRC and reconfiguring completion message In IE from LTE standard extension.In the present embodiment, target eNode B can obtain CSI report, therefore, mesh earlier Mark enode b can quickly recognize the cell of coordination.Hereafter, by UE contexts release message (release of UE contexts) from target Enode b is sent to source enode b (step S28), and completes handoff procedure.

In the GSM of the present embodiment, when the handover procedure is completed, target eNode B has identified association Turn area down.Therefore, target eNode B can send CoMP information to the enode b of cooperation immediately, and obtain for transmitting Confirmation signal (step S30).Hereafter, source enode b and synergistic evolution node B perform data-signal to user equipment (UE) The coordinating transmissions (step S32) of (data).After the coordinating transmissions for switching are started, in the way of similar to step S10, In order to further switch user equipment (UE) and/or coordinate the renewal of cell, source enode b is periodically sent to user equipment Peripheral cell measurement request message UE (step S40).

Although it have been described that being presently believed to be the preferred embodiments of the present invention, but it is to be understood that it can be entered The various modifications of row, and it is intended that all such true spirits changed, such as fall within the present invention of appended claims covering In scope.

The described above of specific embodiment of the invention has been presented for the purpose of illustration and description.They are not poor It is most or the present invention and application method are restricted to disclosed precise forms.Obviously, according to above-mentioned teaching, many modifications and change Change is possible.Selection and description embodiment be in order to best explain the present invention principle and its practical application, and so as to Enable others skilled in the art most preferably using the present invention and with suitable for the various of expected special-purpose The various embodiments of modification.It should be appreciated that in the case where not departing from the spirit or scope of claim of the present invention, Ke Yishe Think various omissions or the replacement of equivalent, because situation can advise or be presented expedient, and be intended to covering application or realize.

Claims (6)

1. a kind of method to set up for GSM, it is characterised in that wherein described system includes multiple wireless base stations, Methods described includes：

The quality of reception of the reference signal from the multiple wireless base station is measured, the multiple wireless base station includes described first Wireless base station and second wireless base station adjacent with first wireless base station, and the reception based on coordinating multiple points communication period Quality, it is logical to the first wireless base station in response to the detection of the switching of the mobile station from the first wireless base station to the second wireless base station Know the quality of reception；

Second wireless base station is notified by the first wireless base station, including from one in the quality of reception notified that mobile station is notified The first information and perform coordinating multiple points communication candidate information, the multiple wireless base station passes through by the second base station；

Mobile station is asked to notify the propagation path information between movement station and multiple wireless base station candidates before switching is completed；

Propagation path information is notified to the second wireless base station.

2. method to set up according to claim 1, it is characterised in that also include：

In response to the notice of the first information, request mobile station notifies mobile station and multiple wireless bases before or after switching is completed Propagation path information between the candidate stood；

Propagation path information is notified to the second wireless base station.

3. method to set up according to claim 1, it is characterised in that wherein, is asked to notify by first wireless base station The propagation path information, described information includes sending the signal related to wireless heterogeneous networks to the movement station, with including The request.

4. method to set up according to claim 1, it is characterised in that wherein, wireless to described second by the mobile station Base station notifies the propagation path information to include to related to wireless heterogeneous networks signal transmission response signal, with including The propagation path information.

5. method to set up according to claim 1, it is characterised in that wherein notify to propagate road by the request of the second wireless base station Footpath information, including the signal relevant with access control is sent to mobile station, with including the request.

6. method to set up according to claim 1, it is characterised in that wherein, wireless to described second by the movement station Base station notifies the propagation path information to include to related to wireless heterogeneous networks signal transmission response signal, with including The propagation path information.