CN102264142B - Method for improving high-speed uplink packet access rate - Google Patents

Abstract

The invention provides a method for improving a high-speed uplink packet access (HSUPA) rate, and the method comprises: according to the principle that frame division multiplexing is preferably adopted, configuring an uplink dedicated physical channel (DPCH) to an HSUPA user to be dispatched to the current dispatching subframe; and determining an E-PUCH (E-DCH Uplink Channel) resource pool used by each HSUPA user to be dispatched, wherein when the dispatching subfame contains an HS-SICH (High Speed-Shared Information Channel) but not an E-RUCCH (E-DCH Random Uplink Control channel) or an uplink DPCH, the E-PUCH resource pool contains a time slot resource in which the HS-SICH exists when the correlation between the HSUPA user to be dispatched and the channel using the HS-SICH is smaller than a threshold. By utilizing the method, the use ratio of the uplink resource can be effectively improved, and the uplink throughput of the HSUPA is improved.

Description

A kind of method of improving high-speed uplink packet access rate

Technical field

The present invention relates to mobile communication technology, particularly relate to a kind of method that promotes high speed uplink packet access (HSUPA) speed.

Background technology

At present, in typical high-speed packet access (HSPA) carrier wave allocation plan of high-speed packet access system, at up enhancing uplink physical channel (EPUCH) resource pool that only configures one or two time slot, because the resource of EPUCH resource pool is very few, thereby cause the efficiency of transmission of HSUPA to be limited by very large.For example, in the situation that uplink and downlink timeslot allocation ratio is 2: 4, only distribute the EPUCH resource pool of a time slot, in the situation that uplink and downlink timeslot allocation ratio is 3: 3, only distributed the EPUCH resource pool of two time slots.

For high-speed packet access (HSPA) system, it follows channel (DPCH) to be generally only used for command transmitting, and the bandwidth of demand is less, generally adopts frame to divide multiplexing being configured.For example, adopt SF=8,4 times of frames to divide the needs that can meet transmission.

In above-mentioned typical HSPA carrier wave allocation plan, the time slot (as TS1) at DPCH place is upper can share information channel (HS-SICH) and enhanced uplink random access channel (E-RUCCH) (as shown in fig. 1) by while configuration high-speed conventionally.Wherein, the probability that E-RUCCH sends is very little, almost can ignore, and the required bandwidth of DPCH is little as previously mentioned, and in a lot of situations, whole TS1 does not send any DPCH channel.Like this, usually can only have HS-SICH channel (as shown in Figure 2) on TS1, now, in the code channel resource of TS1, except the shared code channel resource of HS-SICH channel, other code channel resources are idle, and this will cause the significant wastage of uplink code channel resource.

A kind of method that can make full use of uplink code channel resource raising HSUPA efficiency of transmission is not yet proposed at present.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method of improving high-speed uplink packet access rate, and the method can make full use of uplink code channel resource and improve HSUPA efficiency of transmission.

In order to achieve the above object, the technical scheme that the present invention proposes is:

A method for improving high-speed uplink packet access rate, the method comprises the following steps:

A, divide multiplexing principle according to preferential employing frame, for the HSUPA user's collocating uplink to be dispatched in current scheduling subframe is followed channel (DPCH);

B, determine the E-PUCH resource pool that HSUPA user to be dispatched uses described in each; Wherein,

In the time that described scheduling subframe exists up DPCH, in described E-PUCH resource pool, do not comprise described up DPCH place time interval resource;

In the time that described scheduling subframe exists E-RUCCH, in described E-PUCH resource pool, do not comprise described E-RUCCH channel place time interval resource;

In the time there is HS-SICH and not having E-RUCCH and up DPCH in described scheduling subframe, if described in HSUPA user to be dispatched be less than default threshold value with user's the channel relevancy that uses described HS-SICH, in described E-PUCH resource pool, comprise described HS-SICH place time interval resource;

In the time that described scheduling subframe does not exist HS-SICH, E-RUCCH and up DPCH, in described E-PUCH resource pool, comprise the free timeslot resource that does not have HS-SICH, E-RUCCH and up DPCH.

In sum, the method of the improving high-speed uplink packet access rate that the present invention proposes, in the channel relevancy of having considered between user, can on the time slot of HS-SICH place, use E-PUCH, thereby can be when the E-PUCH interference level of guaranteeing TS1, TS2 be consistent substantially, greatly promote the utilance of ascending resource, improved the uplink throughput of HSUPA.

Brief description of the drawings

Fig. 1 is that in existing system, uplink and downlink timeslot allocation ratio is the HSUPA carrier wave configuration schematic diagram of 2: 4 o'clock;

Fig. 2 is that in existing system, uplink and downlink timeslot allocation ratio is the sending mode schematic diagram of the TS1 of 2: 4 o'clock;

Fig. 3 is the schematic flow sheet of the embodiment of the present invention one.

Embodiment

For making the object, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.

Core concept of the present invention is, in existing system, there is larger waste in the code channel resource on the time slot at DPCH place, the present invention will divide under multiplexing prerequisite at DPCH frame, make full use of the idle moment of DPCH, utilize idle code channel resource transmission E-PUCH, thereby can promote the utilance of ascending resource, improve the uplink throughput of HSUPA.

Fig. 3 is the schematic flow sheet of one embodiment of the invention, and as shown in Figure 3, this embodiment mainly comprises:

Step 301, divide multiplexing principle according to preferential employing frame, for the HSUPA user's collocating uplink to be dispatched in current scheduling subframe is followed channel (DPCH).

Here, use to E-PUCH channel in order to reserve complete resource pool as far as possible, when configuration DPCH, will preferentially adopt frame to divide multiplexing principle.Because HSUPA user's the up DPCH of following ordinary circumstance is only carried 3.4K signaling, adopt frame to divide the multiplexing transmission requirement that substantially just can meet.

Concrete, at least plural in the time dispatching HSUPA user when having, the identical frame of preferential employing divides multiplexer mode, the i.e. preferential identical repetition period (repetition perio) of employing, repeat length (repetitionlength), biasing (offset) and different code channel resources distribute.

Step 302, determine the E-PUCH resource pool that HSUPA user to be dispatched uses described in each.

This step is used to each HSUPA user to be dispatched to configure E-PUCH resource pool, here be with the existing methodical main distinction: in the time having HS-SICH and do not have E-RUCCH and up DPCH in scheduling subframe, to consider on the basis of the correlation between user, HS-SICH place time interval resource is included in E-PUCH resource pool, the utilance of resource can be effectively improved like this, the demodulation performance of signal can be guaranteed again simultaneously.

Particularly, for each HSUPA user to be dispatched, when for its configuration E-PUCH resource pool, under different situations, need to observe following principle:

In the time that described scheduling subframe exists up DPCH, in described E-PUCH resource pool, do not comprise described up DPCH place time interval resource;

In the time that described scheduling subframe exists E-RUCCH, in described E-PUCH resource pool, do not comprise described E-RUCCH channel place time interval resource;

In the time there is HS-SICH and not having E-RUCCH and up DPCH in described scheduling subframe, if described in HSUPA user to be dispatched be less than default threshold value with user's the channel relevancy that uses described HS-SICH, in described E-PUCH resource pool, will comprise described HS-SICH place time interval resource;

In the time that described scheduling subframe does not exist HS-SICH, E-RUCCH and up DPCH, in described E-PUCH resource pool, comprise the free timeslot resource that does not have HS-SICH, E-RUCCH and up DPCH.

In mentioned above principle, only in the time there is HS-SICH and not having E-RUCCH and up DPCH in described scheduling subframe, HSUPA user to be dispatched is less than in the situation of predetermined threshold value with the channel relevancy that uses HS-SICH user, all code channel resources on the time slot of HS-SICH place can be configured to the resource pool to E-PUCH.Can expand like this E-PUCH resource pool, effectively improve the uplink throughput of HSUPA, can effectively avoid HS-SICH and the synchronic gap of E-PUCH again on the other hand time, because the channel relevancy of different user is larger, be difficult to accurate demodulation and cause base station place to receive after upward signal.

In actual applications, the channel relevancy between user can be defined as:

Wherein, i=1,2; h _irepresent i user's channel vector.

In the time that the correlation of two UE is weak, when ρ is less than a predetermined threshold value, two users' HS-SICH and E-PUCH can share time slot.

Here, those skilled in the art can require arrange according to the difference of the demodulation performance to HS-SICH and EPUCH (as signal interference ratio, the error rate etc.) in practical application as described in threshold value.Particularly, when demodulation performance being required when high, can be by this threshold value setting large, otherwise, when demodulation performance being required when low, can be by this threshold value setting less.Those skilled in the art can obtain suitable threshold value by emulation based on mentioned above principle, do not repeat them here.

Further, in order to improve the accuracy of demodulation, be total in slot transmission situation at HS-SICH and E-PUCH, demodulation can be carried out to upward signal by the method for joint-detection in base station.Therefore, after step 302, may further include:

Describedly treat that dispatched users is utilized as its definite E-PUCH resource pool, send upward signal to base station;

Demodulation is carried out to the upward signal receiving in described base station; Wherein, in the time of HS-SICH and the common slot transmission of E-PUCH, described base station adopts the method for joint-detection to carry out described demodulation.

Here, carry out the concrete grammar of joint-detection by those skilled in the art are grasped, specifically can adopt following method to realize:

In the time of HS-SICH and the common slot transmission of E-PUCH, the reception signal of base station end can be expressed as:

r ₁＝C ₁H ₁₁x ₁+C ₂H ₂₁x ₂+n ₁

r ₂＝C ₁H ₁₂x ₁+C ₂H ₂₂x ₂+n ₂

r _Ka＝C ₁H _1，Kax ₁+C ₂H _2，Kax ₂+n _Ka (1)

Wherein, Ka represents the total number of channels of base station end antenna, r _jrepresent j the reception signal phasor on passage, j=1,2 ..., Ka.C _i, represent i user's code word matrix, i=1,2; x _irepresent i user's transmission symbolic vector; H _ijrepresent the channel matrix of j passage of i user.N _j, i=1,2 ..., Ka represents j the noise vector on passage.

Formula (1) can be reduced to:

$r=\left[\begin{array}{c}{r}_1\\ r_2\\ .\\ .\\ .\\ r_{\mathrm{Ka}}\end{array}\right]=\mathrm{Ax}+n=\left[\begin{array}{cc}{C}_1{H}_{11}& C_2{H}_{21}\\ C_1{H}_{12}& C_2{H}_{22}\\ .& .\\ .& .\\ .& .\\ C_1{H}_{1,\mathrm{Ka}}& C_2{H}_{2,\mathrm{Ka}}\end{array}\right]\left[\begin{array}{c}{x}_1\\ x_2\end{array}\right]+\left[\begin{array}{c}{n}_1\\ n_2\\ .\\ .\\ .\\ n_{\mathrm{Ka}}\end{array}\right]---\left(2\right)$

For the reception signal shown in formula (2), can adopt joint detection algorithm to carry out demodulation, for least mean-square error (MMSE) joint-detection, its deterministic is:

$\hat{x}={(A^{H}A+{\mathrm{\σ}}^2)}^{-1}{A}^{H}r---\left(3\right)$

Performance when meeting the synchronic gap of HS-SICH/E-PUCH, need to make the correlation matrix R=A shown in formula (3) ^hin fact A nonsingularization of trying one's best be exactly a little less than making channel relevancy between the UE of HS-SICH and the UE of E-PUCH as far as possible.

In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (3)

1. a method that promotes high speed uplink packet access HSUPA speed, is characterized in that, the method comprises the following steps:

A, divide multiplexing principle according to preferential employing frame, for the HSUPA user's collocating uplink to be dispatched in current scheduling subframe is followed channel DPCH;

B, determine the enhancing uplink physical channel E-PUCH resource pool that HSUPA user to be dispatched uses described in each; Wherein,

In the time that described scheduling subframe exists up DPCH, in described E-PUCH resource pool, do not comprise described up DPCH place time interval resource;

In the time that described scheduling subframe exists enhanced uplink random access channel E-RUCCH, in described E-PUCH resource pool, do not comprise described E-RUCCH channel place time interval resource;

In the time there is high-speed shared information channel HS-SICH and not having E-RUCCH and up DPCH in described scheduling subframe, if described in HSUPA user to be dispatched be less than default threshold value with user's the channel relevancy that uses described HS-SICH, in described E-PUCH resource pool, comprise described HS-SICH place time interval resource;

In the time that described scheduling subframe does not exist HS-SICH, E-RUCCH and up DPCH, in described E-PUCH resource pool, comprise the free timeslot resource that does not have HS-SICH, E-RUCCH and up DPCH.

2. method according to claim 1, is characterized in that, after described step b, further comprises:

Described treat dispatched users be utilized as its determine described E-PUCH resource pool, send upward signal to base station;

Demodulation is carried out to the upward signal receiving in described base station; Wherein, in the time of HS-SICH and the common slot transmission of E-PUCH, described base station adopts the method for joint-detection to carry out described demodulation.

3. method according to claim 1, is characterized in that, described preferential employing frame divides multiplexing principle further to comprise:

Wait dispatching HSUPA user when more than at least two, preferentially adopt identical frame point multiplexer mode to carry out the configuration of described DPCH when described.