CN101399604A - Multiplexing method for following special physical channel - Google Patents
Multiplexing method for following special physical channel Download PDFInfo
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- CN101399604A CN101399604A CNA2007101518802A CN200710151880A CN101399604A CN 101399604 A CN101399604 A CN 101399604A CN A2007101518802 A CNA2007101518802 A CN A2007101518802A CN 200710151880 A CN200710151880 A CN 200710151880A CN 101399604 A CN101399604 A CN 101399604A
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- following special
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Abstract
The invention discloses a reuse method of associated dedicated physical channels. The reuse method comprises the following steps: a reuse mode the associated dedicated physical channels is selected; states of various associated dedicated physical channels are determined according to the number of reuse users of various associated dedicated physical channels; and the associated dedicated physical channel at the reuse mode or idle mode is selected and distributed to at least one user for use. The reuse method can effectively improve the utilization rate of code resources and improve the capacity and the downlink throughput of a system.
Description
Technical field
The present invention relates to the communications field, relate more specifically to a kind of multiplexing method of following special physical channel.
Background technology
At TD SDMA (Time Division-Synchronization CodeDivision Multiple Access, abbreviation TD-SCDMA) introduced high speed downlink packet access (High Speed Downlink Packet Access in Release 5 agreements of technology, be called for short HSDPA) technology, to improve professional descending throughput.Each HSDPA user needs a up following special physical channel (Associated Dedicated PhysicalChannel, be called for short A-DPCH) and a descending following special physical channel carry transmitting power control (Transmit Power Control, abbreviation TPC) than top grade information.Each follows DPCH need take corresponding channel code.And in the TD-SCDMA wireless access technology, the number of sign indicating number resource is very limited, and channel code of each HSDPA CU can make yard resource become the HSDPA user capacity of sub-district and the bottleneck of downlink throughput capacity.
In the TD-SCDMA wireless access technology, each DPCH has the repetition period attribute of (Repetition period), repeat length (Repetition Length) and time offset (Offset).Two parameters of Repetition period and Offset can be used for determining the user's of multiplexing same DPCH Connection Frame Number (CFN), i.e. this user's the transmission opportunity of eating dishes without rice or wine: CFN mod Repetition period=Offset.In a Repetition period, the user who shares the same DPCH of following realizes that by disposing different Offset the CFN of transmission data between the user is not overlapping, reaches the purpose that multi-subscriber time shared sends.
How reasonably to set the value of repetition period (Repetition period), repeat length (Repetition Length) and time offset (Offset), promptly select which kind of channel multiplexing mode, the quality that is related to multiplexing performance needs to select as required according to different scenes and performance requirement.
Summary of the invention
One or more problems in view of the above the invention provides a kind of multiplexing method of following special physical channel.
Multiplexing method according to following special physical channel of the present invention may further comprise the steps: the multiplex mode of selecting following special physical channel; According to the users multiplexing number of each following special physical channel, determine the state of each following special physical channel; And the following special physical channel of selecting to be in multiplexing or idle condition is distributed at least one user's use.
Wherein, the multiplex mode of following special physical channel is: keep the transformat of following special physical channel constant, and make the repeat length of following special physical channel equal the Transmission Time Interval of this channel.Alternatively, the multiplex mode of following special physical channel is: the Transmission Time Interval that reduces following special physical channel, keep transmission block big or small constant of following special physical channel, and make the repeat length of following special physical channel equal the amended Transmission Time Interval of this channel.
Wherein, the preferential following special physical channel of selecting to be in multiplexing state is distributed at least one user's use.Under the situation that does not have the following special physical channel that is in multiplexing state, the following special physical channel of selecting to be in idle condition is distributed at least one user's use.
Wherein, use channel allocation to identify the state of indicating each following special physical channel.After distributing following special physical channel, the channel allocation sign of each following special physical channel is upgraded at least one user.And after at least one user is released to the following special physical channel of its distribution, the channel allocation sign of each following special physical channel is upgraded.Following special physical channel at the up direction after the renewal is under the situation of idle condition, and the physical channel that following special physical channel blocked that is in idle condition is removed.Wherein, the length and the type of channel allocation sign should be determined according to the users multiplexing number on the solid size road.
In sum, the present invention has improved the utilance of sign indicating number resource effectively by introducing the mode of the same channel of multiuser multiplexing, has increased the capacity and the downlink throughput capacity of system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the outline flowchart according to the multiplexing method of the following special physical channel of the embodiment of the invention;
Fig. 2 is the schematic diagram according to the DPCH channel multiplexing mode one of the embodiment of the invention;
Fig. 3 is the schematic diagram according to the DPCH channel multiplexing mode two of the embodiment of the invention; And
Fig. 4 is the detail flowchart according to the multiplexing method of the following special physical channel of the embodiment of the invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
With reference to figure 1, brief description is according to the multiplexing method of the following special physical channel of the embodiment of the invention.As shown in Figure 1, this multiplexing method may further comprise the steps: S102, the multiplex mode of selection following special physical channel; S104 according to the users multiplexing number of each following special physical channel, determines the state of each following special physical channel; And S106, the following special physical channel of selecting to be in multiplexing or idle condition is distributed at least one user's use.
Wherein, the multiplex mode of following special physical channel is: keep the transformat of following special physical channel constant, and make the repeat length of following special physical channel equal the Transmission Time Interval of this channel.Alternatively, the multiplex mode of following special physical channel is: the Transmission Time Interval that reduces following special physical channel, keep transmission block big or small constant of following special physical channel, and make the repeat length of following special physical channel equal the amended Transmission Time Interval of this channel.
Wherein, the preferential following special physical channel of selecting to be in multiplexing state is distributed at least one user's use.Under the situation that does not have the following special physical channel that is in multiplexing state, the following special physical channel of selecting to be in idle condition is distributed at least one user's use.
Wherein, use channel allocation to identify the state of indicating each following special physical channel.After distributing following special physical channel, the channel allocation sign of each following special physical channel is upgraded at least one user.And after at least one user is released to the following special physical channel of its distribution, the channel allocation sign of each following special physical channel is upgraded.Following special physical channel at the up direction after the renewal is under the situation of idle condition, and the physical channel that following special physical channel blocked that is in idle condition is removed.Wherein, the length and the type of channel allocation sign should be determined according to the users multiplexing number on the solid size road.
With reference to figure 2, describe in detail and to follow DPCH channel multiplexing mode one according to the embodiment of the invention.Wherein, keep following the transformat of signaling in the DPCH channel constant (establishing its Transmission Time Interval is TTIpre), and Repetition length should equal the integral multiple of Transmission Time Interval, so can make Repetition length=TTIpre.According to the attribute of Repetitionperiod and Repetition length, can set Repetition period=N*Repetition length (=N*TTIpre).Wherein, N (〉=2) be the same number of users multiplexing on the DPCH channel of following.Be not difficult to release, the service rate after multiplexing is reduced to original 1/N.
The implementation complexity of multiplex mode shown in Figure 2 is lower.If with fixed longer of Repetitionperiod, then can multiplexing more number of users on channel, but user's service rate also will descend thereupon.Simultaneously,, will increase user's the power control cycle, influence the performance of power control because professional transmission is elongated at interval.So need between users multiplexing number, professional minimum-rate and power control Cycle Length, do a balance, thereby determine Repetitionperiod and the Repetition length of each business in a repetition period.
With reference to figure 3, describe in detail and to follow DPCH channel multiplexing mode two according to the embodiment of the invention.Wherein, revising the transformat of following signaling in the DPCH channel, mainly is to reduce Transmission Time Interval, and the size of transmission block is then constant.If the Transmission Time Interval before revising is TTIpre, amended Transmission Time Interval is: TTInew=1/N*TTIpre.Wherein, N (〉=2) be the same number of users multiplexing on the DPCH channel of following.Here the span of N is subject to the span of TTI, because the span of TTI is that { 10,20,40,80} is so the value of N must satisfy the value of the TTInew that is calculated by following formula within its span.For example, if TTIpre=40ms, then N can be taken as 4 or 2, and corresponding TTInew just equals 10ms or 20ms.And thus as can be seen, this multiplex mode is not suitable for the situation of TTIpre=10ms yet.
At this moment, make Repetition length equal amended TTI value, promptly Repetitionlength=TTInew (=1/N*TTIpre), and Repetition period=N*Repetition length (=TTIpre).Because the business after multiplexing has just reduced Transmission Time Interval, and in the time period of Repetition period=TTIpre, still keep the average transmission rate of business constant.
The resource utilization of multiplex mode shown in Figure 3 is higher, and can guarantee professional average transmission rate, because Repetition length has reduced, thereby can set Repetitionperiod shorter, therefore reduced the power control Effect on Performance.But this mode need be revised the transformat of signaling, and is comparatively complicated, for the users multiplexing number certain restrictive condition arranged also, and do not support the business that multiplexing preceding Transmission Time Interval is 10ms to carry out multiplexing.
In addition, under the situation of sign indicating number resource multiplex, can use a channel allocation sign Allocate_Indic to indicate current multiplexing of channel situation.The length and the type of this channel allocation sign should be determined according to the users multiplexing number on the single channel.Suppose that the multiplexing coefficient on channel is 4 (promptly on channel at most can multiplexing 4 users), then Allocate_Indic can be made as a unsigned character type, totally 8 bits are indicated current multiplexing of channel situation with back 4 of this character.If back four is 0 entirely, show that then current channel for idle, if back four is 1 entirely, then shows current channel for taking, if back four is not 1 entirely, show that then current channel is multiplexing.1 number shows number of users multiplexing in the current channel in back four, determines each user's time offset with the bit at 1 place.That is,, then show current channel idle if Allocate_Indic is 0,000 0000; If Allocate_Indic is 0,000 1111, show that then current channel is for taking; If Allocate_Indic is 0,000 0001, show that then current channel is multiplexing, and multiplexing user, this user's time offset is 0; If Allocate_Indic is 0,000 1001, show that then current channel is multiplexing, and multiplexing two users, these two users' time offset is respectively 0 and 3.
Wherein, can identify the state (idle, multiplexing or take) that Allocate_Indic judges each channel according to channel allocation.And be to follow under the situation of DPCH channel at the channel type of application resource, preferentially select the channel allocation of multiplexing state to give the user.When not having the channel of multiplexing state, select the channel allocation of idle condition to give the user.After channel allocation is finished, need to upgrade the allocation identification Allocate_Indic of each channel.When business discharges, need to upgrade the channel allocation sign Allocate_Indic of shared channel, and the Allocate_Indic after up direction upgrades under 0 the situation, also needs to remove the channel that this channel blocks.
With reference to figure 4, describe multiplexing method in detail according to the following special physical channel of the embodiment of the invention.As shown in Figure 4, this multiplexing method specifically may further comprise the steps:
S402, multiplex process is prepared beginning.
S404 judges as required and selects which kind of multiplex mode.
S406 if select multiplex mode one, then keeps the transformat of business constant, sets Repetition length=TTIpre, Repetition period=N*TTIpre.
S408, if select multiplex mode two, then revise professional transformat as required, set TTInew=1/N*TTIpre, Repetition length=TTInew=1/N*TTIpre, Repetition period=N*Repetition length=TTIpre.
S410 according to single-channel users multiplexing number, determines the type of channel allocation sign Allocate_Indic.
S412 is prepared as new business assigned code resource.
S414, the type of judgement new business.
S416 if for following the DPCH channel, then travel through the Allocate_Indic of each channel, searches the channel allocation of multiplexing state and gives the user.
S418 if there is not multipling channel, then selects idle channel to distribute to the user.
S420 if be the other types business, then distributes required idle channel for the user.
S422 upgrades allocation identification Allocate_Indic occupied or the obstruction channel.
S424, the sign indicating number resource allocation finishes.
In sum, the present invention has introduced the multiuser multiplexing scheme to the DPCH channel of following of HSDPA, and has effectively improved the sign indicating number resource utilization of following the DPCH channel, has increased the capacity and the downlink throughput capacity of system.And follow code-resource distribution method under the DPCH channel multiplexing state, can guarantee to follow the preferential channel of selecting to be in multiplexing state of DPCH channel, and by searching the channel allocation sign, can be fast for following required channel code of DPCH channel allocation and corresponding time offset.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (9)
1. the multiplexing method of a following special physical channel is characterized in that, may further comprise the steps:
Select the multiplex mode of following special physical channel;
According to the users multiplexing number of each following special physical channel, determine the state of each following special physical channel; And
Selection is in the following special physical channel of multiplexing or idle condition and distributes at least one user's use.
2. multiplexing method according to claim 1, it is characterized in that, the multiplex mode of described following special physical channel is: keep the transformat of described following special physical channel constant, and make the repeat length of described following special physical channel equal the Transmission Time Interval of described following special physical channel.
3. multiplexing method according to claim 1, it is characterized in that, the multiplex mode of described following special physical channel is: the Transmission Time Interval that reduces described following special physical channel, keep transmission block big or small constant of described following special physical channel, and make the repeat length of described following special physical channel equal Transmission Time Interval after described following special physical channel reduces.
4. according to claim 2 or 3 described multiplexing methods, it is characterized in that, use channel allocation to indicate the state of described following special physical channel.
5. multiplexing method according to claim 4 is characterized in that, the following special physical channel of selecting to be in multiplexing state is distributed to described at least one user's use.
6. multiplexing method according to claim 5 is characterized in that, under the situation that does not have the following special physical channel that is in multiplexing state, the following special physical channel of selecting to be in idle condition is distributed to described at least one user's use.
7. multiplexing method according to claim 6 is characterized in that, after distributing described following special physical channel for described at least one user, the channel allocation sign of described each following special physical channel is upgraded.
8. multiplexing method according to claim 7 is characterized in that, after described at least one user is released to the described following special physical channel of its distribution, the channel allocation sign of described each following special physical channel is upgraded.
9. multiplexing method according to claim 8 is characterized in that, is under the situation of idle condition at the following special physical channel of the up direction after the renewal, and the physical channel that following special physical channel blocked that is in idle condition is removed.
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| CN200710151880A CN101399604B (en) | 2007-09-25 | 2007-09-25 | Multiplexing method for following special physical channel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083222A (en) * | 2009-11-27 | 2011-06-01 | 中国移动通信集团设计院有限公司 | Distribution method of adjoint channels of HSPA (High Speed Packet Access) system, base station and system |
| CN103476129A (en) * | 2013-08-30 | 2013-12-25 | 北京拓明科技有限公司 | Automatic optimization method for frame dividing and multiplexing structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100679799B1 (en) * | 2002-07-29 | 2007-02-06 | 마츠시타 덴끼 산교 가부시키가이샤 | Radio device and base station device |
| CN1254937C (en) * | 2003-07-01 | 2006-05-03 | 大唐移动通信设备有限公司 | Method and device of physical channel frame distribution in time division dupley synthronous CDMA system |
| JP2005341176A (en) * | 2004-05-26 | 2005-12-08 | Matsushita Electric Ind Co Ltd | Communication terminal and base station apparatus |
| CN100561892C (en) * | 2005-05-10 | 2009-11-18 | 鼎桥通信技术有限公司 | Downward special physical channel distribution method during time division duplex HSDPA |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083222A (en) * | 2009-11-27 | 2011-06-01 | 中国移动通信集团设计院有限公司 | Distribution method of adjoint channels of HSPA (High Speed Packet Access) system, base station and system |
| CN102083222B (en) * | 2009-11-27 | 2013-08-07 | 中国移动通信集团设计院有限公司 | Distribution method of adjoint channels of HSPA (High Speed Packet Access) system, base station and system |
| CN103476129A (en) * | 2013-08-30 | 2013-12-25 | 北京拓明科技有限公司 | Automatic optimization method for frame dividing and multiplexing structure |
| CN103476129B (en) * | 2013-08-30 | 2016-06-08 | 北京拓明科技有限公司 | A kind of frame divides the automatic optimization method of multiplexing structure |
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