CN104202783A - Method for reducing switching frequency of micro base station and macro base station during cooperative work - Google Patents

Abstract

The invention discloses a method for reducing a switching frequency of a micro base station and a macro base station during cooperative work. The method comprises the steps of continuously receiving a CoMP measurement report and a cell switching measurement report of a user device when the user device goes into the CoMP region of a macro base station cell and the micro base station; prohibiting cell switching and appropriately increasing the transmission power of the PDCCH of the cell where the user device stays when a CoMP measured value satisfies a CoMP cooperative work condition, and determining whether cell switching is performed according to the cell switching measurement report of the user device when the CoMP measured value does not satisfy the CoMP cooperative work condition. The method for reducing the switching frequency of the micro base station and the macro base station during cooperative work has the advantages that the switching region is lagged beyond the CoMP region so that the cooperative work region and the switching region do not affect each other, and therefore, the cooperative work is more effectively and the switching flow becomes simpler, and meanwhile, the switching region is shifted beyond the cooperative work region so that the problem of frequent switching due to moving back and forth at the switching region also can be solved.

Description

The method of switching frequency while reducing micro-base station and macro base station collaborative work

Technical field

While the present invention relates to reduce micro-base station and macro base station collaborative work, the method for switching frequency, relates to specifically, under CoMP mode of operation, reduces the method for the switching frequency of the little base station of LTE and macro base station.

Background technology

LTE version 11 is introduced collaborative work cellular technology CoMP, and it is the key technology in LTEAdavance system, and this technology has very large meaning for the collaborative work of small base station and macro base station, is a guardian technique that belongs to micro-station.

CoMP scheduling needs reporting of user periodic measurement, only have signal quality when the user Liang Ge community Shi Caihui that all meets certain requirements to open CoMP, we call collaborative work region the region that meets this condition, when user is in the time that community A moves to community B, user slowly weakens at the signal quality of community A, the signal quality of community B can slowly strengthen, and when triggering switching when a certain amount of a little less than the B signal quality of the signal quality Dao Bi community of A, we call this bit of region Zone switched.

And current, in Zone switched, first user can consider to switch and forbid the collaborative work of Diao Liang community, after switching completes completely, just can reopen CoMP work, can shorten like this CoMP operating time, and make hand-off process flow process become complex.

Summary of the invention

The object of the present invention is to provide a kind of method of switching frequency while reducing micro-base station and macro base station collaborative work, Zone switched hysteresis is arrived outside CoMP region, thereby make collaborative work region and Zone switchedly do not interact, make collaborative work more effective, it is simpler that switching flow also becomes, and Zone switched move on to outside collaborative work region also can be solved to the frequent switching problem that moves around and bring at Zone switched edge simultaneously.

For achieving the above object, technical scheme of the present invention is a kind of method of switching frequency while reducing micro-base station and macro base station collaborative work of design, subscriber equipment enters behind the CoMP region of He Wei base station cell, macro base station community, continues to receive CoMP measurement report and the report of community handover measurement of subscriber equipment;

According to the CoMP measurement report of subscriber equipment, relatively whether CoMP measured value reaches CoMP thresholding;

When CoMP measured value meets CoMP collaborative work condition, forbid community switching, and suitably increase the transmitting power of user equipment to reside in cell PDCCH, to ensure that cooperative data transmission can be received by user;

When CoMP measured value does not meet CoMP collaborative work condition, according to the community handover measurement report of subscriber equipment, judge whether to carry out community switching.

Whether whether CoMP measured value reaches the channel quality that CoMP thresholding refers to user Liang Ge community meets collaborative work condition, so CoMP measured value is exactly the channel quality condition in user Zhe Liangge community.

In fact, by CoMP technology, user is in Cooperative Area, the stack of signal Shi Liangge community, therefore the same when the signal after user Liang Ge community stack, therefore in CoMP region, user is the same for the transmitting-receiving ability of data, even if user resides in the A of community, because the collaborative work that has community B brings gain, make it also can't user job is affected because the signal quality of community A weakens, therefore we can and change workflow delayed switching region by some parameter configuration completely, thereby make collaborative work region and Zone switchedly do not interact, solution basic ideas of the present invention are in CoMP region, to forbid that user switches, community is switched and moved on to outside CoMP region, and increase the transmitting power of PDCCH in persistent district, guarantee the normal work of PDDCH channel in user moves to adjacent cell CoMP region.

The present invention arrives Zone switched hysteresis outside CoMP region, thereby make collaborative work region and Zone switchedly do not interact, make collaborative work more effective, it is simpler that switching flow also becomes, and Zone switched move on to outside collaborative work region also can be solved to the frequent switching problem that moves around and bring at Zone switched edge simultaneously.

Utilize gain that Cooperative Work Technology brings to simplify switching flow and solve the collaborative work flow process complexity of bringing that mutually superposes, avoid occurring that collaborative work is interrupted makes the collaborative work efficiency can not maximized problem, and the frequent switching problem that simultaneously can avoid user to bring two interregional movements.

Brief description of the drawings

Fig. 1 is CoMP job network topology schematic diagram of the present invention;

Fig. 2 is collaborative work of the present invention region and Zone switched schematic diagram;

Fig. 3 is the flow chart of collaborative work of the present invention and hand-off process.

Embodiment

Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.

The concrete technical scheme of implementing of the present invention is:

Suppose that user 1 resides in macro station community A, user 2 Wei Zhan community B, two users are in CoMP region as shown in Figure 1.Specific works flow process of the present invention is:

1: first in CoMP region, open PDCCH the increase of output power function.

2: the parameter configuration of amendment A3 event, the a3-Offset being defined in reportConfigEUTRA is measured as CoMP and community switching, specifically as shown in Figure 2.Measure CoMP in configuration messages by measuring and measure the A3 event switched community ((a3-Offset is defined in reportConfigEUTRA to be used for representing to measure) modifies, by reason independently two measurement event merge into same measurement event.

3: user 1 and user 2 sends and measure base station side, and meets CoMP condition, and base station is labeled as the user that can carry out CoMP transmission, as shown in the step 1 of Fig. 3,2, carries out CoMP transmission.

4: user 1 moves to overlay area, micro-station from macro base station, in this process, can send base station, measurement report road.

5: when user 1 moves to Cooperative Area edge, will carry out community switching, macro base station will send RRC reconfiguration request to user 1, send instructions to CoMP management end simultaneously user is removed from CoMP administration queue, stop CoMP transmission.

6: user 1 sends RRC and reshuffled message to micro-station, successful switch Dao Weizhan community B.

In said process, process is fairly simple, has brought into play greatly the ability of cooperation district, and there is no the intervention of switching flow, and process is simply efficient.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (1)

1. the method for switching frequency while reducing micro-base station and macro base station collaborative work, is characterized in that:

Subscriber equipment enters behind the CoMP region of He Wei base station cell, macro base station community, continues to receive CoMP measurement report and the report of community handover measurement of subscriber equipment;

According to the CoMP measurement report of subscriber equipment, relatively whether CoMP measured value reaches CoMP thresholding;

When CoMP measured value meets CoMP collaborative work condition, forbid community switching, and suitably increase the transmitting power of user equipment to reside in cell PDCCH, to ensure that cooperative data transmission can be received by user;

When CoMP measured value does not meet CoMP collaborative work condition, according to the community handover measurement report of subscriber equipment, judge whether to carry out community switching.