CN101159456B - Scheduling assisted method and system for HSDPA power control - Google Patents
Scheduling assisted method and system for HSDPA power control Download PDFInfo
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Abstract
The invention relates to a scheduling method of high-speed downlink packet access power control which is used in a mobile communication system, which includes that: Step 1, allocate the continuous scheduling time T of a terminal with T more than N, wherein T is a natural number, and N is a sub-frame number differential between the shared control channel signal of the high-speed downlink shared channel and the shared indication channel signal of the high-speed downlink shared channel; Step 2, if the current sub-frame number S can be exactly divided by T, or no scheduling information of the terminal is buffered currently, the high-speed media access control module schedules the terminal in terms of the normal scheduling method; if the current sub-frame number S can not be exactly divided by T, or some scheduling information of the terminal is buffered currently, the high-speed media access control module directly schedules the terminal for continuously scheduling the terminal for N+1 times to realize the power control. The invention is easy to be implemented, and is able to make best use of the prior power control module to assist in resolving the scheduling problem of power control.
Description
Technical field
The present invention relates to TD SDMA (TD-SCDMA) mobile communication system, relate in particular to scheduling assisted method and the system of TD-SCDMA mobile communication system high speed downlink grouped access (HSDPA) power control.
Background technology
Divide in the mobile radio system at code, generally can improve with the fast power control technology capacity of system, avoid near-far interference on the impact of systematic function.Conventional business all comprises up channel and the down channel that a pair of emission continuous in time receives, and therefore, is easy to utilize the reception signal of a channel to finish quick control to the power of one other channel.
As shown in Figure 1, suppose up at time slot 1, descending at time slot 6, if at subframe i, terminal is received downstream signal, signal quality according to downstream signal, can calculate a downlink power control command word dlTpc (i), at subframe i+1, terminal is on up channel, this TPC (power control command word) order is sent to Node B (machine station), after Node B receives, just can determine that jointly this channel is at the down transmitting power of subframe i+1 according to transmitting power and the dlTpc (i) of the subframe i of down channel.Similarly, if Node B receives upward signal at subframe i, can be according to the signal quality of up channel, calculate a ulTpc (i), at subframe i+1, Node B sends to terminal to this TPC order on down channel, after terminal is received, can jointly determine the uplink transmission power of this channel on subframe i+1 according to transmitting power and the ulTpc (i) of up channel subframe i.
With conventional professional different, professional for HSDPA, except comprising the following DPCH (DPCH) channel of a pair of routine, also need to have the collaborative work of pair of control channel, be descending HS-SCCH (shared control channel of high speed descending sharing channel) and up HS-SICH (the shared indicating channel of high speed descending sharing channel), because HS-SCCH and HS-SICH are shared channel, so if access HSDPA number of users is greater than the quantity of the HS-SCCH of configuration, it is discontinuous then can to cause any one terminal to take time of HS-SCCH and HS-SICH, and since the HS-SICH response message with respect to the time delay of HS-SCCH interchannel more than or equal to 4 subframes, therefore, if do not carry out special processing, be easy to have power control commands, but do not carry the channel of power control commands, or have the carrying power control commands channel, the situation that does not but have power control commands, these all can directly cause the power of HS-SCCH/HS-SICH to be controlled unsuccessfully, thereby whole system can't normally be moved.
Fig. 2 has shown in the right situation of the shared HS-SCCH/HS-SICH channel of 3 terminals, suppose that the every power control commands of taking turns certain terminal in 2 situations of scheduling of each terminal sends situation, at this moment, because this terminal uplink and downlink signals is discontinuous, directly caused through-put power control (TPC) order to send situation untimely and that send without the TPC order, at this moment, system can not normal operation.
Call which terminal by high speed media access control (MAC-HS) the module schedules decision of system in certain subframe, in at present all systems, the scheduling of power control and MAC-HS all is two fully independences, 2 parts that are independent of each other, common dispatching algorithm has mainly been considered priority and the fairness of terminal, therefore for concrete certain terminal, the time point that it is scheduled and scheduling times only possess the characteristic on the statistical significance, and specific to a certain particular point in time, then has very large uncertainty, therefore, all can not support conventional power control, can only be the special power control mode of HS-SCCH/HS-SICH channel specialized designs, so just need to be when power control, identify handled channel, and add extra handling process, so increased the complexity of whole system, the direct power control module of inheriting tradition.
Summary of the invention
The problem to be solved in the present invention has provided a kind of scheduling assisted method and system of HSDPA power control, the problem that is used for solving existing power Control and Schedule solution complexity height and does not support existing power control module.
The invention provides a kind of dispatching method of high-speed downlink packet access power control, be used for mobile communication system, comprising:
If current subframe numbers S is not divided exactly by T, and the current schedule information that this terminal of buffer memory is arranged, then the high speed media access control module is directly dispatched this terminal, is used for dispatching this terminal N+1 time at least continuously, to realize power control.
After described terminal was scheduled, NodeB and described terminal were carried out following steps according to the power control module:
Step 21, in S subframe to the S+N-1 subframe on each subframe, NodeB issues the shared control channel signal of high speed descending sharing channel according to initial power, and sends the uplink power control command word according to 0,3 sequences; Terminal is according to shared indicating channel signal transmitting power and the downlink power control command word of the high speed descending sharing channel of each subframe in shared control channel calculated signals S+1 subframe to the S+N subframe of high speed descending sharing channel;
Step 22 sends to NodeB with shared indicating channel signal transmitting power and the downlink power control command word of the high speed descending sharing channel in the S+N subframe;
Step 23, in each frame of S+N subframe to the S+T-1 subframe, NodeB calculates the uplink power control command word according to the shared indicating channel signal of the book vertical frame dimension speed DSCH Downlink Shared Channel that receives, and resolve the downlink power control command word of last subframe, the transmitting power of the shared control channel signal of current subframe down high speed DSCH Downlink Shared Channel is adjusted in the downlink power control order of the last subframe of foundation, carries described NodeB according to the shared indicating channel signal generation uplink power control command word of the book vertical frame dimension speed DSCH Downlink Shared Channel that receives in the shared control channel signal of this down high speed DSCH Downlink Shared Channel that issues; In each frame of S+N subframe to the S+T-1 subframe, terminal comprises the shared indicating channel signal of this up-high speed DSCH Downlink Shared Channel of described downlink power control command word according to the shared indicating channel signal transmitting power of the up-high speed DSCH Downlink Shared Channel of shared control channel next subframe that signal calculates of current subframe down high speed DSCH Downlink Shared Channel and the downlink power control command word of current subframe in next subframe emission.
Comprise that also described terminal is scheduled with the front time interval that once is scheduled again less than predetermined value, the transmitting power of preserving according to the last time when then again being scheduled is launched as Initial Trans; Otherwise, launch according to the Initial Trans of all channel configurations.
When also being included in the described terminal of deletion, delete the routine information of described terminal and the schedule information of this terminal that is buffered.
In the described step 2, described conventional dispatching method comprises equity dispatching method or priority weighted dispatching method.
In the described step 2, described N=3.
Described mobile communication system is the TD-SCDMA mobile communication system.
The invention provides a kind of dispatching patcher of high-speed downlink packet access power control, be used for mobile communication system, comprise configuration module and high speed media access control module;
Configuration module is used for the continuous scheduling times T of configurating terminal, and T＞N, T are natural number, and N is the subframe numbers difference between the shared indicating channel signal of the shared control channel signal of high speed descending sharing channel and high speed descending sharing channel;
The high speed media access control module, be used for judging whether current subframe numbers S is divided exactly by T, and/or the current schedule information whether this terminal of buffer memory is arranged, and dispatch according to judged result: if current subframe numbers S is divided exactly by T, perhaps the current schedule information that does not have this terminal of buffer memory is then dispatched this terminal according to conventional dispatching method; If current subframe numbers S is not divided exactly by T, and the current schedule information that this terminal of buffer memory is arranged, then directly dispatch this terminal, to dispatch at least continuously this terminal N+1 time, realize power control.
Also comprise removing module, be used for when the described terminal of deletion, deleting the routine information of described terminal and the schedule information of this terminal that is buffered.
Described mobile communication system is the TD-SCDMA mobile communication system.
The present invention is easy to implement, and can take full advantage of the scheduling problem that existing power control module is helped solve power control.
Description of drawings
Fig. 1 is the power control process schematic diagram of continuous channel in the prior art;
The schematic diagram that Fig. 2 can't normally carry out power control when being the shared HS-SCCH/HS-SICH of 3 users;
The schematic diagram that Fig. 3 normally carries out power control when being the shared HS-SCCH/HS-SICH of 3 users provided by the invention;
Fig. 4 is continuous scheduling schematic diagram provided by the invention;
Fig. 5 is system schematic provided by the invention.
Embodiment
Scheduling assisted method provided by the invention, can be implemented on the MAC-HS module, in a single day user of scheduling restriction by HSDPA is scheduled, more than inferior with regard to continuous scheduling (N+1), guarantee in time to send to the opposite end to 1 up TPC order and 2 descending TPC orders at least, so the TD-SCDMA mobile communication system just can normally operation in the situation of inheriting existing power control mode fully.Wherein, after N was defined as and issues HS-SCCH, to the subframe numbers difference of receiving between the HS-SICH signal, this numeral was determined by the time slot configuration situation of HS-SCCH and HS-SICH; K is defined as the arbitrary integer greater than 0, represents effective TPC order number.
Consider the timing relationship of HS-SCCH and HS-SICH channel, if a terminal is by scheduling (N+1+K) is inferior continuously, then can guarantee to have at least the up TPC order of K and (K+1) individual descending TPC order can in time send to the opposite end, by the value of K is set, just can effectively finish power control at HS-SCCH/HS-SICH.
Suppose N=3, K=2, then the power control commands on the HS-SCCH/HS-SICH sends situation as shown in Figure 3.
Owing to there is not upward signal, so Node B can't calculate the uplink power control order, can only send the uplink power control command word according to 0,3 sequences on subframe 0,1; Owing to there is not the downlink power control command word, so power or the Initial Trans emission of HS-SCCH can only be called according to last this terminal the time; On terminal, each subframe can be calculated transmitting power and the downlink power control command word of the HS-SICH of next subframe according to HS-SCCH information, but because subframe 1,2 does not have HS-SICH, so subframe 0,1 result of calculation can't be delivered to Node B.
On subframe 2, because there is up HS-SICH in subframe 3, so transmitting power and the downlink power control command word of next subframe of calculating of subframe 2 can send to Node B in subframe 3, and it is processed and subframe 0,1 the same.
On subframe 3,4,5, terminal sends HS-SICH according to the result of calculation of subframe 2, all the other handling processes are with subframe 0,1,2, Node B end receives upward signal first, can be according to the Mass Calculation uplink power control command word of upward signal, and calculate the transmitting power of next subframe according to the downlink power control command word, because the transmission of power control commands word has the time delay of a subframe, therefore, in fact only have the transmitting power of subframe 4,5 HS-SICH to receive effective control.
In subframe 6,7,8, owing to there has not been descending HS-SCCH, so terminal can't calculate new downlink power control command word, thus in subframe 7,8, can only be by 0,3 sequence emission downlink power control command word, and the transmitting power of up HS-SICH remains unchanged.
The present invention is described in detail according to specific embodiment for the below.
Continuously the step of scheduling as shown in Figure 4, concrete power control flow process can with reference to figure 3, comprise:
Step 401, the continuous scheduling times T of configurating terminal, T＞N, beginning is scheduling continuously;
Step 402 judges whether SubSfn%T is 0, if execution in step 403, otherwise execution in step 405;
Step 403 is selected terminal to be scheduled according to conventional dispatching method (equity dispatching method RR or priority weighted dispatching method PF), and is preserved this schedule information; Execution in step 404;
The be scheduled information of terminal of step 404, buffer memory, execution in step 406;
Step 405 is judged the current end message to be scheduled whether buffer memory is arranged, if so, and execution in step 406, otherwise execution in step 403;
Step 406 is called this terminal.
In the above-mentioned steps, SubSfn represents the current system frame number.
In addition, when deletion is scheduled terminal, in the deletion routine information, also need to delete the information that is scheduled that this terminal is buffered.
Suppose that current subframe is s, s%T==0, when subframe s, a Ue begins to be scheduled for the 1st time, then for the power control module, works as follows by figure, and wherein Ue refers to the terminal that is scheduled:
A at subframe s, (s+1), (s+2), at Node B end, issues HS-SCCH by Initial Trans, and the TPC command word of each subframe is respectively 0,3,0;
Hold at Ue, according to descending HS-SCCH signal, generate respectively corresponding downlink power control command word dlTpc (0), dlTpc (1), dlTpc (2), and be ulScp (1), ulScp (2), ulScp (3) according to the transmitting power that descending power control commands word calculates respectively the HS-SICH of subframe (s+1), (s+2), (s+3).
B arrives subframe (s+T-1) in subframe (s+i), (3＜=i＜=T-1).
Hold at Node B, Node B at first receives the HS-SICH of this subframe, then according to the signal quality of HS-SICH, generate up Tpc command word ulTpc (i), parse simultaneously dlTpc (i-1) command word, ordering the transmitting power of adjusting descending HS-SCCH according to dlTpc (i-1) is dlScp (i), and issues the HS-SCCH of this subframe by dlScp (i) at the time point of configuration, in HS-SCCH, carry ulTpc (i) command word.
At Ue end, Ue sends the up HS-SICH of this subframe by ulScp (i) power, carries dlTpc (i-1) command word in this message.Afterwards, Ue receives the descending HS-SCCH information of this subframe, according to the dlTpc (i) that this information is carried, calculates the transmitting power ulScp (i+1) of the HS-SICH of next subframe.
C, if in next one T dispatching cycle, this Ue is not scheduled, then at subframe (s+T), (s+T+1), (s+T+2), in Node B side, received corresponding HS-SICH after, still need to generate the uplink power control command word of corresponding subframe, and parse the downlink power control command word of correspondence and the transmitting power of the HS-SCCH that calculates next subframe, but there is not corresponding HS-SCCH to send.
In the Ue side, because the uplink power control order that these several subframes are not received HS-SCCH, therefore, the transmitting power of up HS-SICH is constant, carries respectively simultaneously 0,3,0 downlink power control order.
Step D, if in next one T dispatching cycle, this Ue is continued scheduling, then presses B work.
Step e, if after Ue dispatched in a period of time, do not rescheduled, if blanking time is greater than a thresholding GAP, after then Ue is rescheduled, by the Initial Trans emission of all code channels by configuration, if less than a thresholding GAP, then press last transmitting power of preserving blanking time as Initial Trans.
The invention provides a kind of dispatching patcher 50 of HSDPA power control, as shown in Figure 5, be used for mobile communication system, comprise configuration module 501, high speed media access control module 502 and removing module 503;
Described configuration module 501 is used for the continuous scheduling times T of configurating terminal, and T＞N, T are natural number, and N is the subframe numbers difference between the shared indicating channel signal of the shared control channel signal of high speed descending sharing channel and high speed descending sharing channel;
High speed media access control module 502, be used for judging whether current subframe numbers S is divided exactly by T, and/or the current schedule information whether this terminal of buffer memory is arranged, and dispatch according to judged result: if current subframe numbers S is divided exactly by T, perhaps the current schedule information that does not have this terminal of buffer memory is then dispatched this terminal according to conventional dispatching method; If current subframe numbers S is not divided exactly by T, and the current schedule information that this terminal of buffer memory is arranged, then directly call this terminal, to dispatch at least continuously this terminal N+1 time, realize power control;
Described removing module 503 is used for deleting the routine information of described terminal and the schedule information of this terminal that is buffered when the described terminal of deletion.
Described mobile communication system is the TD-SCDMA mobile communication system.
Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite the spirit and scope of the present invention of claims.Therefore scope of the present invention is not limited in above explanation, but determined by the scope of claims.
Claims (10)
1. the dispatching method of a high-speed downlink packet access power control is used for mobile communication system, it is characterized in that, comprising:
Step 1, the continuous scheduling times T of configurating terminal, T＞N, T are natural number, N is the subframe numbers difference between the shared indicating channel signal of the shared control channel signal of high speed descending sharing channel and high speed descending sharing channel;
Step 2, if current subframe numbers S divided exactly by T, the perhaps current schedule information that does not have this terminal of buffer memory, then the high speed media access control module is dispatched this terminal according to conventional dispatching method;
If current subframe numbers S is not divided exactly by T, and the current schedule information that this terminal of buffer memory is arranged, then the high speed media access control module is directly dispatched this terminal, is used for dispatching this terminal N+1 time at least continuously, to realize power control.
2. dispatching method as claimed in claim 1 is characterized in that, after described terminal was scheduled, NodeB and described terminal were carried out following steps according to the power control module:
Step 21, in S subframe to the S+N-1 subframe on each subframe, NodeB issues the shared control channel signal of high speed descending sharing channel according to initial power, and sends the uplink power control command word according to 0,3 sequences; Terminal is according to shared indicating channel signal transmitting power and the downlink power control command word of the high speed descending sharing channel of each subframe in shared control channel calculated signals S+1 subframe to the S+N subframe of high speed descending sharing channel;
Step 22 sends to NodeB with shared indicating channel signal transmitting power and the downlink power control command word of the high speed descending sharing channel in the S+N subframe;
Step 23, in each frame of S+N subframe to the S+T-1 subframe, NodeB calculates the uplink power control command word according to the shared indicating channel signal of the book vertical frame dimension speed DSCH Downlink Shared Channel that receives, and resolve the downlink power control command word of last subframe, the transmitting power of the shared control channel signal of current subframe down high speed DSCH Downlink Shared Channel is adjusted in the downlink power control order of the last subframe of foundation, carries described NodeB according to the shared indicating channel signal generation uplink power control command word of the book vertical frame dimension speed DSCH Downlink Shared Channel that receives in the shared control channel signal of this down high speed DSCH Downlink Shared Channel that issues; In each frame of S+N subframe to the S+T-1 subframe, terminal comprises the shared indicating channel signal of this up-high speed DSCH Downlink Shared Channel of described downlink power control command word according to the shared indicating channel signal transmitting power of the up-high speed DSCH Downlink Shared Channel of shared control channel next subframe that signal calculates of current subframe down high speed DSCH Downlink Shared Channel and the downlink power control command word of current subframe in next subframe emission.
3. dispatching method as claimed in claim 2, it is characterized in that, comprise that also described terminal is scheduled with the front time interval that once is scheduled again less than predetermined value, the transmitting power of preserving according to the last time when then again being scheduled is launched as Initial Trans; Otherwise, launch according to the Initial Trans of all channel configurations.
4. dispatching method as claimed in claim 2 is characterized in that, when also being included in the described terminal of deletion, deletes the routine information of described terminal and the schedule information of this terminal that is buffered.
5. such as the described dispatching method of claim 1-4 any one, it is characterized in that in the described step 2, described conventional dispatching method comprises equity dispatching method or priority weighted dispatching method.
6. such as the described dispatching method of claim 1-4 any one, it is characterized in that, in the described step 2, described N=3.
7. such as the described dispatching method of claim 1-4 any one, it is characterized in that described mobile communication system is the TD-SCDMA mobile communication system.
8. the dispatching patcher of a high-speed downlink packet access power control is used for mobile communication system, it is characterized in that, comprises configuration module and high speed media access control module;
Configuration module is used for the continuous scheduling times T of configurating terminal, and T＞N, T are natural number, and N is the subframe numbers difference between the shared indicating channel signal of the shared control channel signal of high speed descending sharing channel and high speed descending sharing channel;
The high speed media access control module, be used for judging whether current subframe numbers S is divided exactly by T, and/or the current schedule information whether this terminal of buffer memory is arranged, and dispatch according to judged result: if current subframe numbers S is divided exactly by T, perhaps the current schedule information that does not have this terminal of buffer memory is then dispatched this terminal according to conventional dispatching method; If current subframe numbers S is not divided exactly by T, and the current schedule information that this terminal of buffer memory is arranged, then directly dispatch this terminal, to dispatch at least continuously this terminal N+1 time, realize power control.
9. dispatching patcher as claimed in claim 8 is characterized in that, also comprises removing module, is used for deleting the routine information of described terminal and the schedule information of this terminal that is buffered when the described terminal of deletion.
10. such as the described dispatching patcher of claim 8-9 any one, it is characterized in that described mobile communication system is the TD-SCDMA mobile communication system.
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| CN2007101768899A CN101159456B (en) | 2007-11-06 | 2007-11-06 | Scheduling assisted method and system for HSDPA power control |
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| CN2007101768899A CN101159456B (en) | 2007-11-06 | 2007-11-06 | Scheduling assisted method and system for HSDPA power control |
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| CN101159456B true CN101159456B (en) | 2013-03-27 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1717965A1 (en) * | 2005-04-27 | 2006-11-02 | Alcatel Alsthom Compagnie Generale D'electricite | Transmission power control for HSDPA connections |
| US7148749B2 (en) * | 2005-01-31 | 2006-12-12 | Freescale Semiconductor, Inc. | Closed loop power control with high dynamic range |
| CN1917393A (en) * | 2006-08-31 | 2007-02-21 | 华为技术有限公司 | Method and device for controlling up going transmission power |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7148749B2 (en) * | 2005-01-31 | 2006-12-12 | Freescale Semiconductor, Inc. | Closed loop power control with high dynamic range |
| EP1717965A1 (en) * | 2005-04-27 | 2006-11-02 | Alcatel Alsthom Compagnie Generale D'electricite | Transmission power control for HSDPA connections |
| CN1917393A (en) * | 2006-08-31 | 2007-02-21 | 华为技术有限公司 | Method and device for controlling up going transmission power |
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