CN102196519A - Method for triggering cell reselection/switching by mobile terminal - Google Patents
Method for triggering cell reselection/switching by mobile terminal Download PDFInfo
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- CN102196519A CN102196519A CN 201010500170 CN201010500170A CN102196519A CN 102196519 A CN102196519 A CN 102196519A CN 201010500170 CN201010500170 CN 201010500170 CN 201010500170 A CN201010500170 A CN 201010500170A CN 102196519 A CN102196519 A CN 102196519A
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Abstract
The invention discloses a method for triggering cell reselection/switching by a mobile terminal. The method comprises the following steps: UE monitors a neighbor cell and a target cell after the neighbor cell satisfying a reselection/switching triggering condition is detected; within a triggering time, the UE respectively monitors the target cell and a service cell by using a relative signal quality index measured value and an absolute signal quality index measured value as cell signal quality values; the UE exits the cell reselection or switching triggering process if the target cell does not satisfy the reselection or switching triggering condition within the triggering time; and otherwise, the UE triggers a reselection or switching triggering event while the triggering time is satisfied. In a technical scheme of the invention, the reselection/switching triggering condition is judged within the triggering time by using the relative signal quality index measured value aiming at the service cell and the reselection/switching target cell, thereby reducing the dependence of the reselection/switching event triggering on the unreliable absolute signal quality index and improving the triggering accuracy of the reselection/switching event.
Description
Technical field
The present invention relates to mobile communication system cell gravity treatment/handoff technique, specially refer to a kind of portable terminal and (be called for short the method for UE) triggering cell gravity treatment/switching.
Background technology
In mobile communication system, after UE started shooting, it was resident always can to select a proper cell (being called for short Serving cell) to carry out, and the business of initiating on Serving cell is then set up or received the business foundation request of network and obtain the wireless traffic service.UE is known the wireless environment situation of periphery by the signal quality of each adjacent cells in the neighbor list of periodic measurement Serving cell.When existing signal quality to be better than the adjacent cells of Serving cell, can receive the Serving cell signal to UE and cause interference, may cause UE to receive the internet message decoding error, therefore detect when satisfying sub-district gravity treatment/handover triggering condition adjacent area as UE, can open a timing length is the timer of triggered time (signaling that comes from network side is assigned), in the triggered time, this adjacent area is monitored as Target cell, if Target cell continues to satisfy sub-district gravity treatment/handover triggering condition in the triggered time, UE under the idle condition can initiate cell reselection process, gravity treatment is resident on the adjacent cells of better quality, UE under the dedicated service connection status can report network with measurement report, carries out the sub-district by network-triggered and switches.
The condition of UE triggering cell gravity treatment is under the idle condition:
Exist service quality to be better than the adjacent area of current service cell, and this adjacent area can be resident; Wherein, sub-district service quality is calculated according to cell signal quality measured values and is obtained.
With 3rd Generation Partnership Project (be called for short, 3GPP) mobile communication system is an example, and the condition of its triggering cell gravity treatment is:
Have the adjacent area of R value, and the S parameter of this adjacent area (being used for representing the parameter of cell quality, S＞0th, one of necessary condition that the sub-district is resident) is greater than 0 greater than Serving cell R value.
Wherein, the lag parameter of its signal quality measured values superposition signaling of R value basis of Serving cell (is called for short Qhyst
s) wait acquisition; The side-play amount of its signal quality measured values superposition signaling of R value basis of adjacent area (is called for short Qoffset
S, n) wait acquisition.
The essential condition that UE triggering cell under the connection status is switched is:
Exist service quality to be better than the adjacent area of current service cell, and this adjacent area can be resident; Wherein, sub-district service quality is calculated according to cell signal quality measured values and is obtained.
With the 3GPP mobile communication system frequently in the best cell change (be called for short, 1G) incident is an example:
Exist the adjacent area of S＞0 to satisfy following relation:
10·LogM
i+O
i-H＞10·LogM
previous_best+O
previous_best (1)
Or,
M
i+O
i-H＞M
previous_best+O
previous_best (2)
Wherein, M
Previous_bestBe Serving cell signal quality measured values, M
iBe the signal quality of adjacent cells measured value; O
Previous_bestBe the corresponding side-play amount of Serving cell signal quality measured values, O
iBe the corresponding side-play amount of signal quality of adjacent cells measured value, H is the lag parameter of handover measurement report triggering.
Above-mentioned trigger condition uses absolute signal quality index (measured value of beacon channel or pilot channel) as cell signal quality measured values usually in the prior art.
By foregoing description as can be seen, the method for prior art when triggering cell gravity treatment/switching is:
1, the beacon channel of UE real-time monitor service sub-district and each adjacent area or pilot channel measured value (monitoring) by periodic measurement;
2, whether beacon channel or the pilot channel measured value real-time judge according to each sub-district exists the adjacent area of satisfying gravity treatment/handover triggering condition;
If 3 detect the adjacent area of satisfying gravity treatment/handover triggering condition, open gravity treatment/switching timer, this adjacent area is monitored as Target cell;
If 4 Target cells continue to satisfy gravity treatment/handover triggering condition in the triggered time, the UE triggering cell reuse adoption process under the idle condition, gravity treatment is resident to this sub-district, and the UE reporting measurement reports under the connection status is by the network-triggered cell switch process; Otherwise replacement timer.
In the prior art, beacon channel or pilot channel measured value are the core foundations that gravity treatment/handover event triggers; Because the triggering place of gravity treatment/handover event is usually located at the marginal position of logic district, the signal quality in described place, interference level, channel circumstance complexity etc. all embody and significantly worsen performance, and UE is insecure often to the measurement result of beacon channel or pilot channel absolute signal quality herein; Though prior art has adopted ancillary technique means such as comprising lag parameter, triggered time, but still can cause the raising of gravity treatment/handover triggering condition misjudgment probability, thereby cause the increase of gravity treatment/handover event error probability because the error rate of the measurement result of beacon channel or pilot channel absolute signal quality promotes.
Summary of the invention
In view of this, the invention provides a kind of sub-district gravity treatment/switch triggering method, to improve the accuracy rate of gravity treatment/handover trigger.
Technical scheme of the present invention is:
The absolute signal quality index of UE periodic measurement Serving cell and each sub-district;
If UE detects the adjacent area that the absolute signal quality index satisfies gravity treatment or handover triggering condition, UE as Target cell, begins monitoring objective sub-district and Serving cell with this adjacent area;
In the triggered time, UE respectively with relative signal quality index measured value and absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
If the situation of discontented lumping weight choosing of described Target cell or handover triggering condition occurs in the triggered time, UE withdraws from sub-district gravity treatment or handover trigger process, otherwise when satisfying in the triggered time, UE triggers gravity treatment or switches reported event;
Wherein, the described triggered time is configured by network, and the triggered time is greater than 0.
Described relative signal quality index comprises:
The beacon channel carrier/interface ratio (be called for short, C/I) and/or the beacon channel signal interference ratio (be called for short, SIR) and/or beacon channel chip-level signal to noise ratio (be called for short, Ec/No).
Described UE respectively with relative signal quality index measured value and absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell further comprise:
From monitoring zero hour to T constantly, UE with absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
Begin constantly to satisfy constantly from T to the triggered time, UE with relative signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
Wherein, the span of described T is, the monitoring zero hour～monitoring zero hour+triggered time-10ms.
Described respectively with relative signal quality index measured value and absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell further comprise:
In triggered time, UE all the time with absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
Begin constantly to satisfy constantly from T to the triggered time, UE with relative signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
Wherein, described T span constantly is, the monitoring zero hour～monitoring zero hour+triggered time-10ms.
The present invention uses in the triggered time at the relative signal quality index measured value of Serving cell and gravity treatment/switching target small area and implements gravity treatment/handover triggering condition judgement, reduce the dependence of gravity treatment/handover event triggering, improve the accuracy that gravity treatment/handover event triggers insecure absolute signal quality index.
Description of drawings
Fig. 1 is prior art sub-district gravity treatment/switch triggering method flow chart
Fig. 2 is the specific embodiment of the invention 1 flow chart
Fig. 3 is the specific embodiment of the invention 2 flow charts
Embodiment
For further specifying technical scheme of the present invention, provide preferred implementation below and also describe in detail in conjunction with the accompanying drawings.
Specific embodiment 1
Present embodiment should be the application of method of the present invention in the reuse adoption process of 3GPP FDD system.Overall procedure as shown in Figure 2.
1, the absolute signal quality index of UE periodic measurement Serving cell and each adjacent area;
The absolute signal quality index is that (be called for short, P-CPICH) received signal code power (is called for short, RSCP) Primary Common Pilot Channel in the present embodiment
If detecting the P-CPICH RSCP of adjacent area, 2 UE satisfy the gravity treatment trigger condition, execution in step 3, otherwise execution in step 1;
3, UE as Target cell, opens gravity treatment/switching timer, monitoring objective sub-district and Serving cell with this adjacent area;
Wherein, the timing length of described gravity treatment/switching timer is the triggered time; In the present embodiment, the triggered time value is 5.12s;
4, UE in the triggered time respectively with relative signal quality index measured value and absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
Described relative signal quality index comprises, beacon channel C/I and/or beacon channel SIR and/or beacon channel Ec/No; In the present embodiment, described relative signal quality index is P-CPICH SIR.
401, be opened to T constantly from gravity treatment/switching timer, UE detects P-CPICH RSCP in real time, with P-CPICH RSCP measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
402, begin constantly to gravity treatment/switch overtime constantly from T, UE detects P-CPICH SIR in real time, with P-CPICH sir measurement value as the cell signal mass value, monitoring objective sub-district and Serving cell;
The span of described T is, the monitoring zero hour～monitoring zero hour+triggered time-10ms; In the present embodiment, T=monitors the zero hour+triggered time-10ms;
If 5 in the triggered time UE detect described Target cell and the situation that discontented lumping weight selects trigger condition occurs; Execution in step 6, otherwise execution in step 7;
6, UE replacement gravity treatment/switching timer withdraws from sub-district gravity treatment trigger process, execution in step 1;
7, gravity treatment/switch overtime, the gravity treatment of UE triggering cell, gravity treatment is resident to Target cell.
In the present embodiment, UE is boundary with default moment T in the triggered time, use absolute signal quality index and relative signal quality index to carry out sub-district gravity treatment monitoring constantly respectively at T, under the prerequisite that improves sub-district gravity treatment triggering accuracy rate, controlled the engineering cost of solution, reduced the engineering difficulty of existing scheme to evolution of the present invention.
Specific embodiment 2
Present embodiment is the application of the inventive method in the 1G incident handoff procedure of 3GPP LCR TDD system, and overall procedure as shown in Figure 3.
1, the absolute signal quality index of UE periodic measurement Serving cell and each sub-district;
The absolute signal quality index is that Primary Common Control Physical Channel (is called for short RSCP PCCPCH) in the present embodiment;
If detecting the PCCPCH RSCP of adjacent area, 2 UE satisfy 1G trigger conditions execution in step 3, otherwise execution in step 1;
3, UE as Target cell, opens gravity treatment/switching timer, monitoring objective sub-district and Serving cell with this adjacent area;
Wherein, the timing length of described gravity treatment/switching timer is the triggered time; In the present embodiment, triggered time value 1280ms;
4, UE in the triggered time respectively with relative signal quality index measured value and absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
Described relative signal quality index comprises, beacon channel C/I and/or beacon channel SIR and/or beacon channel Ec/No; In the present embodiment, described relative signal quality index is PCCPCH Ec/No and PCCPCH C/I.
401, in the triggered time, UE detects PCCPCH RSCP in real time, with PCCPCH RSCP measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
402, begin constantly to gravity treatment/switch overtime constantly from T, UE detects PCCPCH Ec/No and PCCPCH C/I in real time, respectively with PCCPCH Ec/No and PCCPCH C/I measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
The span of described T is, the monitoring zero hour～monitoring zero hour+triggered time-10ms; In the present embodiment, T=monitors the zero hour+5ms;
If 5 in the triggered time UE detect the situation that handover triggering condition appears not satisfying in described Target cell; Execution in step 6, otherwise execution in step 7;
6, UE closes gravity treatment/switching timer, withdraws from sub-district handover trigger process, execution in step 1;
7, gravity treatment/switch overtime, the UE reporting measurement reports is by the network-triggered cell switch process.
In the present embodiment, in the triggered time, UE uses the absolute signal quality index to implement sub-district handover trigger monitoring always, simultaneously, T constantly after, increase relative signal quality index and absolute signal quality index and implement sub-district handover trigger monitoring simultaneously, further improved sub-district handover trigger accuracy rate; Because only beginning to increase extra quality index at predetermined instant, processing scheme considers, limited to the impact of existing engineering proposal.
Those of ordinary skill in the art is obviously clear and understand, the inventive method for above embodiment only be used to illustrate the inventive method, and be not limited to the inventive method.As, the present invention also can be applicable to the sub-district gravity treatment under CELL_FACH, CELL_PCH, the URA_PCH in the 3GPP system, indication optimum frequency under the CELL_DCH state is upgraded and (is called for short, 2a) the best cell change (is called for short in incident, the different system, 3d) incident, (be called for short, LTE) the indication adjacent area in the system is more excellent (is called for short, 3A) scene such as incident Long Term Evolution.Though effectively described the present invention by embodiment, those of ordinary skills know that there are many variations in the present invention and do not break away from spirit of the present invention.Without departing from the spirit and substance of the case in the method for the present invention, those skilled in the art work as can make various corresponding changes or distortion according to the inventive method, but these corresponding changes or distortion all belong to the claim protection range of the inventive method.
Claims (4)
1. the method for portable terminal triggering cell gravity treatment/switching is characterized in that, comprising:
The absolute signal quality index of mobile terminal UE periodic measurement Serving cell and each sub-district;
If UE detects the adjacent area that the absolute signal quality index satisfies gravity treatment or handover triggering condition, UE as Target cell, begins monitoring objective sub-district and Serving cell with this adjacent area;
In the triggered time, UE respectively with relative signal quality index measured value and absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
If the situation of discontented lumping weight choosing of described Target cell or handover triggering condition occurs in the triggered time, UE withdraws from sub-district gravity treatment or handover trigger process, otherwise when satisfying in the triggered time, UE triggers gravity treatment or handover event reports;
Wherein, the described triggered time is configured by network, and the triggered time is greater than 0.
2. the method for a kind of portable terminal triggering cell gravity treatment according to claim 1/switching is characterized in that described relative signal quality index comprises:
Beacon channel carrier/interface ratio and/or beacon channel signal interference ratio and/or beacon channel chip-level signal to noise ratio.
3. the method for a kind of portable terminal triggering cell gravity treatment according to claim 1 and 2/switching, it is characterized in that, described UE respectively with relative signal quality index measured value and absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell comprise:
From monitoring zero hour to T constantly, UE with absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
Begin constantly to satisfy constantly from T to the triggered time, UE with relative signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
Wherein, the span of described T is, the monitoring zero hour～monitoring zero hour+triggered time-10ms.
4. the method for a kind of portable terminal triggering cell gravity treatment according to claim 1 and 2/switching, it is characterized in that, described UE respectively with relative signal quality index measured value and absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell comprise:
In triggered time, UE all the time with absolute signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
Begin constantly to satisfy constantly from T to the triggered time, UE with relative signal quality index measured value as the cell signal mass value, monitoring objective sub-district and Serving cell;
Wherein, described T span constantly is, the monitoring zero hour～monitoring zero hour+triggered time-10ms.
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| WO2013181946A1 (en) * | 2012-06-08 | 2013-12-12 | 华为技术有限公司 | Cell reselection method, resource release method, user equipment and base station |
| CN103596229A (en) * | 2012-08-13 | 2014-02-19 | 重庆重邮信科通信技术有限公司 | Cell reselection method and mobile terminal |
| CN105101315A (en) * | 2015-07-08 | 2015-11-25 | 浙江大学 | Remote-control mobile communication system and method |
| CN107040956A (en) * | 2016-02-03 | 2017-08-11 | 中国移动通信集团公司 | Reporting management method, terminal and base station are measured in a kind of Internet of Things |
| CN108713330A (en) * | 2016-01-21 | 2018-10-26 | 诺基亚通信公司 | The hybrid plan that switching and UE for network-control independently switch |
| CN112566206A (en) * | 2020-12-02 | 2021-03-26 | Oppo（重庆）智能科技有限公司 | Cell change control method, cell change control device, terminal device and storage medium |
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| WO2013181946A1 (en) * | 2012-06-08 | 2013-12-12 | 华为技术有限公司 | Cell reselection method, resource release method, user equipment and base station |
| CN103476069A (en) * | 2012-06-08 | 2013-12-25 | 华为技术有限公司 | Cell reselection method, resource release method, user equipment and base station |
| CN103476069B (en) * | 2012-06-08 | 2016-03-30 | 华为技术有限公司 | Residence reselecting, method for releasing resource, subscriber equipment and base station |
| CN103596229A (en) * | 2012-08-13 | 2014-02-19 | 重庆重邮信科通信技术有限公司 | Cell reselection method and mobile terminal |
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| CN105101315A (en) * | 2015-07-08 | 2015-11-25 | 浙江大学 | Remote-control mobile communication system and method |
| CN105101315B (en) * | 2015-07-08 | 2019-04-30 | 浙江大学 | Remote control mobile communication system and method |
| CN108713330A (en) * | 2016-01-21 | 2018-10-26 | 诺基亚通信公司 | The hybrid plan that switching and UE for network-control independently switch |
| CN107040956A (en) * | 2016-02-03 | 2017-08-11 | 中国移动通信集团公司 | Reporting management method, terminal and base station are measured in a kind of Internet of Things |
| CN107040956B (en) * | 2016-02-03 | 2021-07-30 | 中国移动通信集团公司 | Measurement reporting management method in Internet of things, terminal and base station |
| CN112566206A (en) * | 2020-12-02 | 2021-03-26 | Oppo（重庆）智能科技有限公司 | Cell change control method, cell change control device, terminal device and storage medium |
| CN112566206B (en) * | 2020-12-02 | 2023-02-28 | Oppo（重庆）智能科技有限公司 | Cell change control method, cell change control device, terminal device and storage medium |
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