CN100421508C - Switching control method for rapid physical downlink shared channel service cell - Google Patents
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Abstract
The present invention discloses a switching control method for a service subzone of a high-speed physical downlink shared channel, which comprises the following steps: a. a user's current optimal subzone is determined by a base station system; B. whether the user's current service subzone of the high-speed physical downlink shared channel and the current optimal subzone is coincident is judged, and if the user's current service subzone of the high-speed physical downlink shared channel and the current optimal subzone is not coincident, the service subzone is switched to the optimal subzone. The adoption of the method of the present invention can cause the high-speed physical downlink shared channel to be kept in the subzone with best signals as much as possible, and accordingly, the technical superiority of high-speed downlink grouping access is fully used for providing high-speed and stable downlink data transmission for the user.
Description
Technical field
The present invention relates to the WCDMA moving communicating field, refer to a kind of method for handover control of rapid physical downlink shared channel service cell especially.
Background technology
(high speed downlink packet inserts to have introduced HSDPA in WCDMA technology the 5th version, High SpeedDownlink Packet Access) technology, it be on satisfying/the asymmetric demand of downstream data traffic and a kind of modulation and demodulation algorithm of proposing, it can improve the service rate of downlink data under the situation that does not change the WCDMA network configuration of having built.HSDPA retransmits (HARQ) by adopting adaptive modulation and coding (AMC), mixing, and the series of key techniques such as fast dispatch of base station, has realized descending high speed data transfer.
The HSDPA technology has increased by three kinds of channels, be respectively the high-speed physical downlink shared channel (HS-PDSCH) (HS-PDSCH) in downlink transmission data information, the High-Speed Shared Control Channel (HS-SCCH) of transmission Downlink Control Information, and the High-Speed Dedicated Physical Control Channel (HS-DPCCH) of transmission uplink feedback information.
Stipulate in the HSDPA technology: a plurality of users in each sub-district can share all resources of HSDPA.The operable HS-PDSCH channel in sub-district can reach 15 at most, and the spreading factor of the channel code that each channel uses is fixed as 16.The channel of these carrying data can be according to user's data transmission demand and residing channel circumstance, rationally distribute to each user dynamically, synchronization also can be given a plurality of users resource according to certain pro rate, as shown in Figure 1, article five, the HS-PDSCH channel is respectively the user transfer of data is provided, and the grid of filling with point, ruling and parallel lines among Fig. 1 represents to be transferred to user 1,2,3 data respectively.By using certain dispatching algorithm, system can also distribute more HS-PDSCH channel for the good user of channel circumstance, so just can further improve the capacity of system.Therefore, very suitable those transfer of data demands of HSDPA technology have non-real-time service sudden, that the transfer of data delay requirement is lower, for example data download, web page browsing etc.On the contrary, for DPCH (DPCH), system is necessary for each user and distributes fixing resource, when certain user does not have transfer of data, distributing to this user's resource can not be used by other user, thereby causes the waste of resource, therefore, DPCH relatively is fit to those real-times and requires business high, the data source constant rate, for example voice call, video telephone etc.
Because the HSDPA technology has moved on to base station (NodeB) to the data dispatch between the different user and flow control and located, therefore,, have only a sub-district to transmit data and give and receive the user at down direction.On the contrary, a user can set up communicating to connect of DPCH (DPCH) with a plurality of sub-districts descending, the DPCH of a plurality of sub-districts is given the user in the same data of synchronization transmission, therefore, the receiving terminal user can receive from the signal of different districts and carry out suitable merging, to reach better receptivity.The user who has set up the DPCH channel communication with a plurality of sub-districts becomes the soft handover user, and the gain of the receptivity that reaches is called soft handover gain.As shown in Figure 2, user 1 has set up two DPCH simultaneously with sub-district 1 and sub-district 2, and as solid arrow indication among the figure, user 1 has entered soft changing state; And 2 of users and sub-district 3 have been set up and have been communicated to connect, and are in non-soft changing state.The sub-district that keeps the DPCH channel to be connected with the user is called active set cell, the sub-district of having set up the connection of HS-PDSCH channel is called HS-PDSCH channel services sub-district, as dotted arrow indication among Fig. 2, the Serving cell of user 1 HS-PDSCH channel is sub-district 2, and the Serving cell of user 2 HS-PDSCH channel is sub-district 3.
In existing WCDMA standard, the HSDPA user that support is in soft changing state is switched the Serving cell of HS-PDSCH channel in active set cell, be illustrated in figure 4 as user among Fig. 2 schematic diagram after switch HS-PDSCH channel services sub-district takes place, system can 2 switch to sub-district 1 to user 1 residing HS-PDSCH channel services sub-district from the sub-district, and keeps his DPCH channel constant; Simultaneously standard HS-PDSCH channel and the DPCH channel of also supporting to be in the HSDPA user of non-switching state switches to new sub-district, and as shown in Figure 4, system can be simultaneously 3 switches to new sub-district 4 to user's HS-PDSCH channel and DPCH channel from the sub-district.
But prior art has just provided the type that HSDPA user HS-PDSCH Serving cell switches, and does not provide and how to trigger, adjudicate and carry out the switching of HS-PDSCH Serving cell.
Summary of the invention
The invention provides a kind of control method that rapid physical downlink shared channel service cell switches that triggers and carry out.
The inventive method comprises:
A: base station system is determined user's current optimum subdistrict;
B: whether the current service cell of high-speed physical downlink shared channel (HS-PDSCH) of judging this user is consistent with its current optimum subdistrict, if not, carries out Serving cell and switches, and current service cell is switched to current optimum subdistrict,
Specifically comprise:
Radio network controller and current optimum subdistrict are set up Radio Link;
Radio network controller is pre-configured high-speed physical downlink shared channel (HS-PDSCH) on current optimum subdistrict; And delete high-speed physical downlink shared channel (HS-PDSCH) on the current service cell in advance; And activate described pre-configured and pre-deletion;
Radio network controller is initiated the physical channel reconfiguration request message by air interface to the mobile subscriber, and the Serving cell of mobile subscriber's high-speed physical downlink shared channel (HS-PDSCH) is switched to current optimum subdistrict from current service cell.
Described steps A comprises: the signal quality of residing active set cell of monitor user ' and supervision collection sub-district, the sub-district that signal quality is best is defined as current optimum subdistrict.
Also comprise before the described step B:
Base station system starts a timer;
Judge whether described timer is overtime, if enter step B.
Described radio network controller is pre-configured high-speed physical downlink shared channel (HS-PDSCH) on current optimum subdistrict, specifically comprise: radio network controller is initiated radio link reconfiguration prepare message, pre-configured high-speed physical downlink shared channel (HS-PDSCH) on current optimum subdistrict to current optimum subdistrict;
High-speed physical downlink shared channel (HS-PDSCH) on the described pre-deletion current service cell specifically comprises: radio network controller is initiated radio link reconfiguration prepare message to current service cell, and the high-speed physical downlink shared channel (HS-PDSCH) on the current service cell is deleted in advance;
The described pre-configured and pre-deletion of described activation specifically comprises: initiate radio link reconfiguration submission message to current optimum subdistrict and current service cell, activate described pre-configured and pre-deletion.
If the current service cell of high-speed physical downlink shared channel (HS-PDSCH) need be deleted because of other reason, then no matter whether timer is overtime, system starts the switching of Serving cell immediately.
The initial start time of described timer is for initially setting up the synchronization of user's high-speed physical downlink shared channel (HS-PDSCH).
After finishing described Serving cell switching, described timer is restarted at every turn.
Use method of the present invention, can in communication process, dynamically change HS-PDSCH channel services sub-district, it preferably is the best sub-district of signal that the HS-PDSCH channel is remained on channel circumstance, for the user provides downlink data transmission at a high speed, and can effectively avoid the frequent switching of its Serving cell, reduced the system signaling treating capacity of system.
Description of drawings
Fig. 1 is that the HSDPA resource is dispatched schematic diagram between a plurality of users;
Fig. 2 is that HSDPA user is in channel connection diagram when communicating by letter;
Fig. 3 triggers the signal interaction diagrams of optimum subdistrict change for monitoring the collection sub-district;
Fig. 4 is that back channel connection diagram is switched in HS-PDSCH channel services sub-district;
Fig. 5 is the flow chart of the inventive method.
Embodiment
Below in conjunction with accompanying drawing the solution of the present invention is further elaborated.
HSDPA user is when utilizing the HS-PDSCH channel to communicate connection, and system is monitoring collection sub-district and the signal quality that monitors the collection sub-district at any time, and the current optimum subdistrict of definite user, and the best sub-district of signal quality is an optimum subdistrict.Wherein, active set cell is the set of cells that keeps the DPCH channel to be connected with the user; Monitor that the collection sub-district is the measurement set of cells that system is handed down to UE (user terminal), comprise the neighbor cell of active set cell.Measurement for co-frequency cell, UE adopts the 1D incident according to each cell signal quality good and bad general, and (the 1D incident is the same frequency measuring case report of stipulating in the WCDMA standard, when optimum subdistrict changes, UE reports the 1D incident, the sub-district of triggering the 1D event report can be active set cell or monitor the collection sub-district) trigger, the sub-district of triggering the 1D incident is optimum subdistrict, if active set cell triggers 1D incident (optimum subdistrict change), may trigger the optimum subdistrict change, trigger the 1D incident if monitor the collection sub-district, may trigger soft handover increase and optimum subdistrict change.
As shown in Figure 2, user's 1 current Serving cell is sub-district 2, communicates connection with the HS-PDSCH channel in the sub-district 2.User's 1 current active set cell is sub-district 1 and sub-district 2, and promptly user 1 has set up DPCH with sub-district 1 with sub-district 2 simultaneously and is connected.If the current optimum subdistrict of user is sub-district 2, this moment, optimum subdistrict was consistent with HS-PDSCH channel services sub-district; If user's current optimum subdistrict changes, suppose that optimum subdistrict changes to sub-district 1, then user's optimum subdistrict is inconsistent with HS-PDSCH channel services sub-district at this moment, system can start switching flow, and user 1 HS-PDSCH channel services sub-district 2 is switched to current optimum subdistrict 1 from the sub-district.
Concrete hand-off execution process sees also Fig. 3, trigger optimum subdistrict change (as triggering the 1D incident) for monitoring the collection sub-district, RNC judgement soft handover increases the signal interaction diagrams of link and the change of HSDPA Serving cell, this user sets up the HSDPA business, has only 1 link in the sub-district 2, be that the HSDPA current service cell is sub-district 2, need switch to current optimum subdistrict 1, comprise following concrete steps:
Step 1: at first carry out soft handover and increase link sub-district 1;
Radio network controller (RNC) is initiated Radio Link to sub-district 1 and is set up request message, and sub-district 1 is returned Radio Link to RNC and set up response message, sets up process by Radio Link and 1 sets up Radio Link (only disposing the DPCH channel) in the sub-district;
Step 2: finishing soft handover by the active set renewal process increases link sub-district 1;
RNC upgrades (increasing sub-district 1) message to mobile subscriber's promotional activities collection; The mobile subscriber finishes active set and upgrades the back and return active set to RNC and upgrade and finish message;
Step 3: pre-configured HSDPA correlated channels on sub-district 1;
RNC initiates radio link reconfiguration prepare message to sub-district 1, pre-configured HSDPA correlated channels on sub-district 1, and sub-district 1 is finished the pre-configured back of channel and is returned the ready message of radio link reconfiguration to RNC;
Step 4: the HSDPA correlated channels on the sub-district 2 is deleted in advance;
RNC initiates radio link reconfiguration prepare message to sub-district 2, and the HSDPA correlated channels on the sub-district 2 is deleted in advance, returns the ready message of radio link reconfiguration to RNC after finish sub-district 2;
Step 5: with the activation of reshuffling on sub-district 1 and the sub-district 2;
RNC initiates radio link reconfiguration submission message to sub-district 1 and sub-district 2, with the activation of reshuffling on sub-district 1 and the sub-district 2;
Step 6: realize that the HSDPA Serving cell switches;
RNC initiates the physical channel reconfiguration request message by air interface to the mobile subscriber, and mobile subscriber's HSDPA Serving cell 2 is switched to sub-district 1 from the sub-district; After finishing switching, the mobile subscriber returns physical channel to RNC and reshuffles and finish message.
Along with constantly moving or the variation of cell signal of user, optimum subdistrict may frequent variations, if therefore HS-PDSCH channel services sub-district is followed the variation of optimum subdistrict and is frequently switched, will increase the burden of system handles signaling, also may make system become unstable simultaneously.Frequent switching for fear of HS-PDSCH channel services sub-district, base station controller can be set a timer, the initial start time of described timer is for initially setting up the synchronization of user's high-speed physical downlink shared channel (HS-PDSCH), timer duration can be adjusted according to actual needs, the suggestion span is (1～100) second, in the timer timing range, no matter whether optimum subdistrict changes, do not start the switching of HS-PDSCH channel services sub-district, with the frequent switching of limited subscriber HS-PDSCH Serving cell.If but the HS-PDSCH Serving cell is deleted because of other reason, then no matter whether timer is overtime, system starts the switching of HS-PDSCH channel services sub-district immediately.
Consult shown in Figure 5ly, when timer was in timeout mode, system compared user's present located HS-PDSCH channel services sub-district with current optimum subdistrict, judge whether unanimity, if consistent, did not then handle; Otherwise, the HS-PDSCH Serving cell is switched to optimum subdistrict.
After switching is finished, described timer is restarted, after timer was overtime once more, system repeated above-mentioned judgement and handoff procedure.
Use method of the present invention, can in communication process, dynamically change HS-PDSCH channel services sub-district, it preferably is the best sub-district of signal that the HS-PDSCH channel is remained on channel circumstance, for the user provides downlink data transmission at a high speed, and can effectively avoid the frequent switching of rapid physical downlink shared channel service cell, reduced the system signaling treating capacity of system.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (7)
1. the method for handover control of a rapid physical downlink shared channel service cell is characterized in that: comprise the following steps:
A: base station system is determined user's current optimum subdistrict;
B: whether the current service cell of high-speed physical downlink shared channel (HS-PDSCH) of judging this user is consistent with its current optimum subdistrict, if not, carries out Serving cell and switches, and current service cell is switched to current optimum subdistrict, specifically comprises:
Radio network controller and current optimum subdistrict are set up Radio Link;
Radio network controller is pre-configured high-speed physical downlink shared channel (HS-PDSCH) on current optimum subdistrict; And delete high-speed physical downlink shared channel (HS-PDSCH) on the current service cell in advance; And activate described pre-configured and pre-deletion;
Radio network controller is initiated the physical channel reconfiguration request message by air interface to the mobile subscriber, and the Serving cell of mobile subscriber's high-speed physical downlink shared channel (HS-PDSCH) is switched to current optimum subdistrict from current service cell.
2. the method for claim 1, it is characterized in that: described steps A comprises: the residing active set cell of monitor user ' and monitor the signal quality of collection sub-district, the sub-district that signal quality is best is defined as current optimum subdistrict.
3. require 1 described method as power, it is characterized in that: also comprise before the described step B:
Base station system starts a timer;
Judge whether described timer is overtime, if enter step B.
4. require 3 described methods as power, it is characterized in that: described radio network controller is pre-configured high-speed physical downlink shared channel (HS-PDSCH) on current optimum subdistrict, specifically comprise: radio network controller is initiated radio link reconfiguration prepare message, pre-configured high-speed physical downlink shared channel (HS-PDSCH) on current optimum subdistrict to current optimum subdistrict;
High-speed physical downlink shared channel (HS-PDSCH) on the described pre-deletion current service cell specifically comprises: radio network controller is initiated radio link reconfiguration prepare message to current service cell, and the high-speed physical downlink shared channel (HS-PDSCH) on the current service cell is deleted in advance;
The described pre-configured and pre-deletion of described activation specifically comprises: initiate radio link reconfiguration submission message to current optimum subdistrict and current service cell, activate described pre-configured and pre-deletion.
5. require 4 described methods as power, it is characterized in that: if the current service cell of high-speed physical downlink shared channel (HS-PDSCH) is deleted because of other reason needs, then no matter whether timer is overtime, system starts the switching of Serving cell immediately.
6. require 5 described methods as power, it is characterized in that: the initial start time of described timer is for initially setting up the synchronization of user's high-speed physical downlink shared channel (HS-PDSCH).
7. require 6 described methods as power, it is characterized in that: after finishing described Serving cell switching, described timer is restarted at every turn.
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| CN101119586B (en) * | 2006-08-04 | 2010-05-12 | 中兴通讯股份有限公司 | Method of implementing high speed downlink sharing channel inter-cell handoff |
| CN101384071B (en) * | 2007-09-07 | 2012-04-04 | 中兴通讯股份有限公司 | HS-DSCH transmission method under state of non-district dedicated channel |
| CN118200968A (en) * | 2019-11-08 | 2024-06-14 | 联发科技股份有限公司 | Method and device for mobile communication |
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| CN1426184A (en) * | 2001-12-11 | 2003-06-25 | 深圳市中兴通讯股份有限公司上海第二研究所 | Decision method for periodic report and channel interval hard switching |
| CN1457565A (en) * | 2001-01-13 | 2003-11-19 | 三星电子株式会社 | Power control apparatus and method for W-CDMA communication system employing high-speed downlink packet access scheme |
| US20040165554A1 (en) * | 2002-04-05 | 2004-08-26 | Interdigital Technology Corporation | System for efficient recovery of node B buffered data following serving high speed downlink shared channel cell change |
| WO2004098227A1 (en) * | 2003-04-25 | 2004-11-11 | Matsushita Electric Industrial Co., Ltd. | Radio communication system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1457565A (en) * | 2001-01-13 | 2003-11-19 | 三星电子株式会社 | Power control apparatus and method for W-CDMA communication system employing high-speed downlink packet access scheme |
| CN1426184A (en) * | 2001-12-11 | 2003-06-25 | 深圳市中兴通讯股份有限公司上海第二研究所 | Decision method for periodic report and channel interval hard switching |
| US20040165554A1 (en) * | 2002-04-05 | 2004-08-26 | Interdigital Technology Corporation | System for efficient recovery of node B buffered data following serving high speed downlink shared channel cell change |
| WO2004098227A1 (en) * | 2003-04-25 | 2004-11-11 | Matsushita Electric Industrial Co., Ltd. | Radio communication system |
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Effective date of registration: 20211224 Address after: 450046 Floor 9, building 1, Zhengshang Boya Plaza, Longzihu wisdom Island, Zhengdong New Area, Zhengzhou City, Henan Province Patentee after: xFusion Digital Technologies Co., Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |
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