CN100590996C - Method for dynamic distribution high speed physical down shared channel code resources - Google Patents

Abstract

This invention discloses a method for dynamically distributing code resources of HS-PDSCH including: initially distributing HS-PDSCH channel codes and the state of all the distributed codes is preserved and distributed, a user applies for new DPCH channel codes, if the current idle code tree meets the the applied DPCH code, then the distribution is successful, if not, then the judgement is carriedout to the HS-PDSCH channel codes to be re-configured, the user releases them to check the state of them and re-configures the codes of the HS-PDSCH, which can distribute HS-PDSCH code resource dynamically and share the code resource between down DPCH and HS-PDSCH dynamically.

Description

A kind of method of dynamic assignment high speed physical down shared channel code resources

Technical field

The present invention relates to sign indicating number resource allocation techniques in the field of wireless communication, the method for especially a kind of dynamic assignment high-speed physical downlink shared channel (HS-PDSCH) (HS-PDSCH) sign indicating number resource.

Background technology

In wireless communication technology field, from the theoretical actual conditions of CDMA, the capacity of cdma system generally all is descending limited.Along with increasing of mobile subscriber's quantity, further the carrying out of data service, the throughput demand of descending reality can be far longer than up, and descending limited problem can be more serious.HSDPA (high speed downlink packet access) be exactly on satisfying/the asymmetric demand of downstream data traffic puts forward, it is a WCDMA down high-speed data solution, it also is the key property of WCDMA technology R5 version, reduce time delay and improve downlink transmission data rate by adaptive modulation and coding (Adaptive Modulation and Coding), the automatic re-transmission of mixing (Hybrid-ARQ), fast dispatch technology such as (Scheduling), its theoretical flank speed can reach more than the 10Mbps.HSDPA will improve the performance and the capacity of grid greatly.It can not only support non-real-time service effectively, simultaneously also can be used for many real time business, as Streaming Media etc.

In the WCDMA system, the introducing of HSDPA has increased by three kinds of physical 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.

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, and operable code channel number can from 1 to 15, and TTI (time interval) length is fixed as 3 Slot.

With reference to Fig. 1, the initial configuration of HS-PDSCH channel code is by CRNC (control RNC) control, and the PHYSICAL SHARED CHANNEL RECONFIGURATION message by Iub interface realizes.

CRNC has determined base station operable HS-PDSCH channel code number in the initial configuration, simultaneously the distribution that the HS-PDSCH channel code must be continuous.Sign indicating number resource on the HSDPA channel all can change at each HS-DSCH (high speed descending sharing channel) frame, because dispatching algorithm realizes in the base station, and standard interface does not have the relevant signaling of message yet, so CRNC can't obtain true sign indicating number resource behaviour in service on the HSDPA channel.

If only use main scrambler, the sign indicating number resource of a sub-district is limited, from above describe as can be seen, after the initial configuration HS-PSDCH channel code, if do not carry out later the dynamically adjustment of sign indicating number resource, it is many that DPCH (DPCH) user appears in single sub-district, when HSDPA user is few, utilance that will significant wastage sign indicating number resource, and cause DPCH user since the resource bid of down channel sign indicating number less than and the access failure.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, a kind of method of dynamic assignment HS-PDSCH channel code resource is provided, reach the purpose that the sign indicating number resource dynamic is shared between descending DPCH and the HS-PDSCH.

The objective of the invention is to be achieved by following technical scheme:

The method of a kind of dynamic assignment high-speed physical downlink shared channel (HS-PDSCH) (HS-PDSCH) sign indicating number resource, after the original allocation HS-PDSCH channel code, according to the state and the cell status of the HS-PDSCH channel code of being distributed,, dynamically allocate HS-PDSCH sign indicating number resource, comprising:

When the DPCH sign indicating number is resource-constrained, reduces the HS-PDSCH channel code, and reconfigure the HS-PDSCH channel code; And

When DPCH sign indicating number resource discharges, increase the HS-PDSCH channel code, and reconfigure the HS-PDSCH channel code.

Initial HS-PDSCH channel code configuration comprises:

Spreading factor SF according to the HS-PDSCH channel code _HS-PDSCHAnd the initial number N of HS-PDSCH channel reservation sign indicating number of CRNC setting _{HS-PDSCH, Init}Value, from maximum original allocation HS-PDSCH channel code forward; After the distribution, all states that are assigned with sign indicating number are " reserve and distribute ".

Wherein, the spreading factor SF of HS-PDSCH channel code _HS-PDSCHBe 16, CRNC is provided with the initial number N of HS-PDSCH channel code _{HS-PDSCH, Init}Span be: 1,2 .., 15; The sign indicating number of actual allocated is { 15-N _{HS-PDSCH, Init}+ 1,15-N _{HS-PDSCH, Init}+ 2 ..., 15}.

When the DPCH sign indicating number is resource-constrained, reduce the HS-PDSCH channel code, and reconfigure the HS-PDSCH channel code and comprise:

The DPCH channel code that user applies is new, spreading factor to be allocated are SF _{DPCH, Req}, the channel yardage is N _{Codes, Req}If satisfy the sign indicating number of DPCH application in the current idle code tree, then be allocated successfully; If do not satisfy, then carry out HS-PDSCH channel code preemption decision, reconfigure the channel code of HS-PDSCH then forward from maximum, the channel code that DPCH is distributed in the success back, the state that mark is assigned with sign indicating number is " reserving occupied ".

Wherein, HS-PDSCH channel code preemption decision comprises:

The HS-PDSCH channel code number N that A, calculating need be seized _{HS-PDSCH, Preempt},

Wherein, SF _HS-PDSCHBe the spreading factor of HS-PDSCH channel code,

Expression rounds up;

B, current all states of note are N for the yardage of " reserving unallocated " _{HS-PDSCH, Resd﹠amp; Idle}If, N _{HS-PDSCH, Preempt}≤ N _{HS-PDSCH, Resd﹠amp; Idle}, then directly seize N _{HS-PDSCH, Preempt}The sign indicating number of individual " reserving unallocated ", and revise its state for " reserving occupied " is allocated successfully and withdraws from channel code and seize;

If C is N _{HS-PDSCH, Preempt}＞N _{HS-PDSCH, Resd﹠amp; Idle}, then seize whole N _{HS-PDSCH, Resd﹠amp; Idle}The sign indicating number of individual " reserving unallocated ", and revise its state and be " reserving occupied ", upgrade the HS-PDSCH channel code number that residue need be seized, continue the channel code of race to control state for " reserve and distribute ", residue need be seized HS-PDSCH channel code number and be: N ' _{HS-PDSCH, Preempt}=N _{HS-PDSCH, Preempt}-N _{HS-PDSCH, Resd﹠amp; Idle}

Among the described step C, the continuation race to control state mainly comprises for the channel code of " reserve and distribute ":

Guarantee the needed HS-PDSCH channel code of all HSDPA QoS of survice number N in C1, the calculation plot _{HS-PDSCH, GBR},

Wherein, R _{GBR, Cell}For the assurance speed of current area (unit: kbps),

K _Ave(unit: kbps), its acquisition methods can be referring to patent CN200510072110.X to represent every average transmission rate of HS-PDSCH code channel;

If C2 is N _{HS-PDSCH, Current}-N _{HS-PDSCH, GBR}〉=N _{HS-PDSCH, Preemp}, then carry out the HS-PDSCH channel code and seize, seizing number is N _{HS-PDSCH, Preempt}, otherwise seize the flow process failure, do not carry out subsequent step; After the HS-PDSCH channel code is seized successfully, reshuffle the channel code of HS-PDSCH, new HS-PDSCH channel code set is:

{15-N _{HS-PDSCH，Current}+N _{HS-PDSCH，Preempt}+1，15-N _{HS-PDSCH，Current}+N _{HS-PDSCH，Preempt}+2，...，15}。

N wherein _{HS-PDSCH, Current}Be the HS-PDSCH channel code number of current state for " reserve and distribute ".

Among the described step C1, guarantee speed R _{GBR, Cell}Computational methods are as follows:

(1) if current in this sub-district have a N HSDPA business, establishing wherein, i the professional speed that guarantees is R _{GBR, i}, N professional assurance speed and be then

(2) establishing all HSDPA of sub-district professional that guarantee speed and thresholding is R _{GBR, THD}(unit: kbps), this thresholding is set in conjunction with the specification of HSDPA business;

(3) get R _{GBR, Cell}=Max (R _GBR(N), R _{GBR, THD}).

Wherein, the assurance speed R of single business _{GBR, i}System of selection is as follows:

(1), gives selection assurance speed the RAB parameter of Access Network from the core net assignment for real time business (type of service is session or stream);

(2) for non-real-time service (type of service is mutual or background), the core net speed of not giving security, but for the speed that guarantees the user is unlikely to too low, Access Network can oneself be provided with a non-real-time service minimum speed limit and guarantee speed as it, and this speed is configurable.

When DPCH channel code resource discharges, increase the HS-PDSCH channel code, and reconfigure the HS-PDSCH channel code and comprise:

The user has discharged the DPCH channel code, if it is the channel code free time of " reserving occupied " that the release result causes original state, then put its new state and be " reserving unallocated ", check the state of all channel code among the HS-PDSCH, according to check result, reconfigure the HS-PDSCH channel code forward from maximum.

Wherein, check the state of HS-PDSCH channel code and dispose the HS-PDSCH channel code and comprise:

Check that HS-PDSCH reserves set { 15-N _{HS-PDSCH, Init}+ 1,15-N _{HS-PDSCH, Init}+ 2 ..., 15-N _{HS-PDSCH, Current}In the state of all channel code; If the channel code state that begins from channel code X all is " reserving unallocated ", then reshuffle the channel code of HS-PDSCH, new HS-PDSCH channel code set X, X+1 ..., 15}, the state that identifies the channel code of all distribution is " reserve and distribute ".

As seen from the above technical solution provided by the invention, the present invention compares with prior art, can be according to cell status, dynamic assignment HS-PDSCH sign indicating number resource, when the sub-district DPCH (DPCH) occurs when the user increases, reach between descending DPCH and the HS-PDSCH sign indicating number resource dynamic and share, effectively utilized system resource, provide cost savings.

Description of drawings

Fig. 1 reconfigures process for sharing physical channel.

Fig. 2 is when the DPCH sign indicating number is resource-constrained among the embodiment 2, reduces the HS-PDSCH channel code, and reconfigures HS-PDSCH channel code flow chart.

Embodiment

Key of the present invention is to give HS-PDSCH with sign indicating number resource original allocation, finish HS-PDSCH channel code initial configuration after, dynamically HS-PDSCH sign indicating number resource is allocated according to the demand of DPCH sign indicating number resource; When DPCH user increases or other reasons when causing the DPCH sign indicating number resource-constrained, then according to the HSDPA user situation, reduce the HS-PDSCH channel code accordingly, give DPCH user with the sign indicating number resource allocation; When DPCH user reduces or after other reasons causes DPCH to have unnecessary sign indicating number resource to discharge, the DPCH channel code that discharges distributed to HS-PDSCH, reconfiguring increases the HS-PDSCH channel code, with assurance HSDPA user's business demand.

Keep for the state of the channel code of HS-PDSCH to be set to following three kinds in the sub-district of the present invention:

State	Practical significance
		Reserve and distribute	Keep for HS-PDSCH, and be configured to the base station
Reserve unallocated	Keep for HS-PDSCH, but reality does not dispose to the base station
		Reserve occupied	Keep for HS-PDSCH, but reality does not dispose to the base station and is taken by DPCH at present

Below in conjunction with embodiment these three kinds of bright concrete conditions are done description one by one.

Embodiment 1

Initial HS-PDSCH sign indicating number configuration:

CRNC is provided with the initial number N of HS-PDSCH sign indicating number _{HS-PDSCH, Init}Be 10, consider the continuity of HS-PDSCH code word, the sign indicating number of actual allocated divides forward continuously from maximum 15, that is: { 15-N _{HS-PDSCH, Init}+ 1,15-N _{HS-PDSCH, Init}+ 2 ..., 15}, thereby the sign indicating number of actual allocated is: 6,7,8,9,10,11,12,13,14,15}.

Behind the original allocation HS-PDSCH sign indicating number, all states that are assigned with sign indicating number just are " reserve and distribute ".

Embodiment 2

Resource-constrained the reshuffling of DPCH sign indicating number reduced the HS-PDSCH channel code, and with reference to figure 2, process is as follows:

1, the user carries out the AMR audio call, applies for the spreading factor SF of new DPCH _{DPCH, Req}Be SF128, channel yardage N _{Codes, Req}Be 1;

2, do not had the idle channel sign indicating number of SF128 in the current idle code tree, carried out HS-PDSCH channel code preemption decision;

3, calculate the channel code number of the HS-PDSCH that need seize

4, current all states are the yardage N of " reserving unallocated " _{HS-PDSCH, Resd﹠amp; Idle}Be 0, and the channel code number N of the target HS-PDSCH that need seize _{HS-PDSCH, Preempt}Be 1, obvious 1＞0, N _{HS-PDSCH, Preempt}＞N _{HS-PDSCH, Resd﹠amp; Idle}, continuing race to control state is the channel code of " reserve and distribute ", need seize HS-PDSCH channel code number and be:

N _{HS-PDSCH, Preempt}=N _{HS-PDSCH, Preempt}-N _{HS-PDSCH, Rcsd﹠amp; Idle}=1, need proceed following steps;

5, guarantee the channel code number N of the needed HS-PDSCH of all HSDPA QoS of survice in the calculation plot _{HS-PDSCH, GBR}

(1) current in this sub-district have 2 HSDPA business, and professional 1 the speed that guarantees is 384kbps, and professional 2 the speed that guarantees is 16kbps, so the assurance speed of all business and Be 384+16=400kbps.

(2) establishing sub-district all HSDPA professional assurance speed and thresholding is 3,000kbps.

(3) get R _{GBR, Cell}=Max (400,3,000), promptly 3,000kbps,

If every transmission rate K that the HS-PDSCH code channel is average _AveEqual 500kbps.

Then

6, the current HS-PDSCH number of codes N that distributes (state is " reserve and distribute ") _{HS-PDSCH, Current}Be 10, obvious (10-6)＞1, N _{HS-PDSCH, Current}-N _{HS-PDSCH, GBR}〉=N _{HS-PDSCH, Preemp}, then can carry out the HS-PDSCH channel code and seize, seizing number is 1; If it is the HS-PDSCH sign indicating number deficiency of " reserve and distribute " that result of calculation shows current state, then seize the flow process failure, do not carry out subsequent step, whole flow process finishes.

7, reshuffle the channel code of HS-PDSCH, new HS-PDSCH channel code set is { 15-N _{HS-PDSCH, Current}+ N _{HS-PDSCH, Preempt}+ 1,15-N _{HS-PDSCH, Current}+ N _{HS-PDSCH, Preempt}+ 2 ..., 15}, promptly 7,8 ..., 15}; Initiate shared physical channel reconfiguration course shown in Figure 1, the channel code that DPCH is distributed in the success back, the state that mark is assigned with sign indicating number just is " reserving occupied ".

Embodiment 3

DPCH channel code resource discharges, and reshuffling increases the HS-PDSCH sign indicating number, and process is as follows:

1, the HS-PDSCH sign indicating number of this sub-district current " reserve and distribute " is for { 11,12,13,14, it is { 9} that 15}, the sign indicating number of " reserving unallocated " gather.

2, the user discharges the PS business, and to cause original state be that the SF16 channel code of " reserving occupied " is 10 free time if discharge the result, and then putting its new state is " reserving unallocated ".

3, check current HS-PDSCH reserve unallocated set 9, the state of all channel code among the 10}.If from the channel code state of channel code 9 beginnings all is " reserving unallocated ", then carry out following steps.

4, reshuffle the channel code of HS-PDSCH, new HS-PDSCH channel code set is for { 9,10,11,12,13,14,15} initiates shared physical channel reconfiguration course shown in Figure 1.After the flow process success, { 9, the 10} state is " reserve and distribute " to the marked channels sign indicating number.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1, a kind of method of dynamic assignment high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH sign indicating number resource, it is characterized in that, after the original allocation HS-PDSCH channel code, according to the state and the cell status of the HS-PDSCH channel code of being distributed, dynamically allocate HS-PDSCH sign indicating number resource, comprising:

When DPCH DPCH sign indicating number is resource-constrained, reduces the HS-PDSCH channel code, and reconfigure the HS-PDSCH channel code; And

When DPCH sign indicating number resource discharges, increase the HS-PDSCH channel code, and reconfigure the HS-PDSCH channel code;

Described minimizing HS-PDSCH channel code, and reconfigure the HS-PDSCH channel code and comprise:

The DPCH channel code that user applies is new, spreading factor to be allocated are SF _{DPCH, Req}, the channel yardage is N _{Codes, Req}If satisfy the sign indicating number of DPCH application in the current idle code tree, then be allocated successfully; If do not satisfy, then carry out HS-PDSCH channel code preemption decision, reconfigure the channel code of HS-PDSCH then forward from maximum, the channel code that DPCH is distributed in the success back, the state that mark is assigned with sign indicating number is " reserving occupied ".

2, the method for the dynamic assignment high speed physical down shared channel code resources of stating as claim 1 is characterized in that, initial HS-PDSCH channel code configuration comprises:

Spreading factor SF according to the HS-PDSCH channel code _HS-PDSCHAnd the initial number N of HS-PDSCH channel reservation sign indicating number of control radio network controller CRNC setting _{HS-PDSCH, Init}Value, from maximum original allocation HS-PDSCH channel code forward; After the distribution, all states that are assigned with sign indicating number are " reserve and distribute ".

3, the method for dynamic assignment high speed physical down shared channel code resources as claimed in claim 2 is characterized in that:

The spreading factor SF of HS-PDSCH channel code _HS-PDSCHBe 16, CRNC is provided with the initial number N of HS-PDSCH channel code _{HS-PDSCH, Init}Span be: 1,2 .., 15; The sign indicating number of actual allocated is { 15-N _{HS-PDSCH, Init}+ 1,15-N _{HS-PDSCH, Init}+ 2 ..., 15}.

4, the method for dynamic assignment high speed physical down shared channel code resources as claimed in claim 1 is characterized in that, HS-PDSCH channel code preemption decision comprises:

The HS-PDSCH channel code number N that A, calculating need be seized _{HS-PDSCH, Preempt},

Wherein, SF _HS-PDSCHBe the spreading factor of HS-PDSCH channel code,

Expression rounds up;

B, current all states of note are N for the yardage of " reserving unallocated " _{HS-PDSCH, Resd﹠amp; Idle}If, N _{HS-PDSCH, Preempt}≤ N _{HS-PDSCH, Resd﹠amp; Idle}, then directly seize N _{HS-PDSCH, Preempt}The sign indicating number of individual " reserving unallocated ", and revise its state for " reserving occupied " is allocated successfully and withdraws from channel code and seize;

If C is N _{HS-PDSCH, Preempt}＞N _{HS-PDSCH, Resd﹠amp; Idle}, then seize whole N _{HS-PDSCH, Resd﹠amp; Idle}The sign indicating number of individual " reserving unallocated ", and revise its state and be " reserving occupied ", upgrade the HS-PDSCH channel code number that residue need be seized, continue the channel code of race to control state for " reserve and distribute ", residue need be seized HS-PDSCH channel code number and be: N ' _{HS-PDSCH, Preempt}=N _{HS-PDSCH, Preempt}-N _{HS-PDSCH, Resd﹠amp; Idle}

5, the method for dynamic assignment high speed physical down shared channel code resources as claimed in claim 4 is characterized in that, among the described step C, the continuation race to control state mainly comprises for the channel code of " reserve and distribute ":

Guarantee the needed HS-PDSCH channel code of all HSDPA QoS of survice number N in C1, the calculation plot _{HS-PDSCH, GBR},

Wherein, R _{GBR, Cell}For the assurance speed of current area (unit: kbps),

K _AveRepresent every transmission rate (unit: kbps) that the HS-PDSCH code channel is average;

If C2 is N _{HS-PDSCH, Current}-N _{HS-PDSCH, GBR}〉=N _{HS-PDSCH, Preemp}, then carry out the HS-PDSCH channel code and seize, seizing number is N _{HS-PDSCH, Preempt}, otherwise seize the flow process failure, do not carry out subsequent step; After the HS-PDSCH channel code is seized successfully, reshuffle the channel code of HS-PDSCH, new HS-PDSCH channel code set is:

{15-N _{HS-PDSCH，Current}+N _{HS-PDSCH，Preempt}+1，15-N _{HS-PDSCH，Current}+N _{HS-PDSCH，Preempt}+2，...，15}。

N wherein _{HS-PDSCH, Current}Be the HS-PDSCH channel code number of current state for " reserve and distribute ".

6, the method for dynamic assignment high speed physical down shared channel code resources as claimed in claim 5 is characterized in that: among the described step C1, guarantee speed R _{GBR, Cell}Computational methods are as follows:

(1) if current in this sub-district have a N HSDPA business, establishing wherein, i the professional speed that guarantees is R _{GBR, i}, N professional assurance speed and be then $R_{\mathrm{GBR}}\left(N\right)=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{R}_{\mathrm{GBR},i};$

(2) establishing all HSDPA of sub-district professional that guarantee speed and thresholding is R _{GBR, THD}(unit: kbps), this thresholding is set in conjunction with the specification of HSDPA business;

(3) get R _{GBR, Cell}=Max (R _GBR(N), R _{GBR, THD}).

7, the method for dynamic assignment high speed physical down shared channel code resources as claimed in claim 6 is characterized in that, the assurance speed R of single business _{GBR, i}System of selection is as follows:

(1), gives selection assurance speed the RAB RAB parameter of Access Network from the core net assignment for real time business;

(2) for non-real-time service, Access Network is provided with a non-real-time service minimum speed limit and guarantees speed as it, and this speed is configurable.

8, the method for dynamic assignment high speed physical down shared channel code resources as claimed in claim 1 is characterized in that, when DPCH channel code resource discharges, increases the HS-PDSCH channel code, and reconfigures the HS-PDSCH channel code and comprise:

The user has discharged the DPCH channel code, if it is the channel code free time of " reserving occupied " that the release result causes original state, then put its new state and be " reserving unallocated ", check the state of all channel code among the HS-PDSCH, according to check result, reconfigure the HS-PDSCH channel code forward from maximum.

9, the method for the dynamic assignment high speed physical down shared channel code resources of stating as claim 8 is characterized in that, checks the state of HS-PDSCH channel code and dispose the HS-PDSCH channel code to comprise:

Check that HS-PDSCH reserves set { 15-N _{HS-PDSCH, Init}+ 1,15-N _{HS-PDSCH, Init}+ 2 ..., 15-N _{HS-PDSCH, Current}In the state of all channel code, wherein, described N _{HS-PDSCH, Init}Be the initial number of HS-PDSCH channel reservation sign indicating number, N _{HS-PDSCH, Current}Be the HS-PDSCH channel code number of current state for " reserve and distribute "; If the channel code state that begins from channel code X all is " reserving unallocated ", then reshuffle the channel code of HS-PDSCH, new HS-PDSCH channel code set X, X+1 ..., 15}, the state that identifies the channel code of all distribution is " reserve and distribute ".

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