CN103796328B - A kind of high-speed packet access carrier dedicated physical channel dispatching method and device - Google Patents

Abstract

The present invention provides an HSPA carrier DPCH scheduling method and device, the method comprising: according to the attributes of the HSPA carrier and the number of HSPA uplink and downlink users, judging whether the time slot 0 TS0 of the HSPA carrier needs to add a DPCH; When the DPCH needs to be added, the frame division multiplexed DPCH is configured according to the code channel power of the TS0. The present invention uses the attributes of the HSPA carrier of TD-SCDMA to dynamically configure the DPCH on the TS0 of the HSPA carrier, expand the HSPA carrier frequency downlink DPCH channel resources, improve the HSPA carrier capacity, and realize the HSPA carrier frequency uplink and downlink with the DPCH code channel Balance, improve the overall access user capacity of the HSPA carrier, and maximize the utilization of spectrum resources.

Description

A high-speed packet access carrier dedicated physical channel scheduling method and device

technical field

The present invention relates to time division-synchronous code division multiple access (TD-SCDMA) wireless communication technology, in particular to a high speed packet access (High Speed Packet Access, HSPA) carrier dedicated physical channel (Dedicated Physical Channel, DPCH) scheduling method and device.

Background technique

TD-SCDMA adopts TDD duplex mode, and can better support asymmetric services by adjusting the ratio of uplink and downlink time slots; among them, the subframe structure of TD-SCDMA includes uplink pilot time slot (UpPTS), guard interval (GP), downlink pilot time slot (DwPTS) and seven business time slots from time slot 0 to time slot 6 (TS0~TS6), TS0 is the downlink broadcast time slot for publishing system broadcast, and TS1~TS6 are common services Time slots can be configured with different ratios of uplink and downlink time slots according to the needs of uplink and downlink data transmission. For example, the ratio of uplink and downlink time slots for mainstream carriers in the current network is 2:4, that is, TS1~TS2 are uplink time slots. TS3~TS6 are downlink time slots.

At present, in order to further enhance the uplink and downlink transmission capabilities of the system, the TD-SCDMA system introduces HSPA technology, which includes High Speed Downlink Packet Access (HSDPA) technology and High Speed Uplink Packet Access (HSUPA) technology. Among them, compared with the HSDPA carrier, the HSUPA carrier has newly added channels such as E-HICH, E-AGCH, FPACH, ERUCCH, and EPUCH; wherein, the E-HICH, E-AGCH, FPACH, and ERUCCH are for implementing HSUPA service calls , a newly added channel for public overhead, and the E-HICH, E-AGCH, and FPACH are common overhead for the downlink. Therefore, the common overhead for the downlink uses four more code channel resources compared to the uplink, which can be used for The downlink resources used by users are correspondingly reduced, resulting in the unbalanced uplink and downlink resources of HSPA carriers, and the system capacity is limited by downlink resources.

Furthermore, with the rapid increase of wireless data services, in areas where users and services are busy, the capacity of HSPA carriers in TD-SCDMA networks has become a bottleneck, which directly affects user access and service establishment.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method and device for scheduling DPCH of HSPA carrier, which can improve the capacity of HSPA carrier.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A high-speed packet access (HSPA) carrier dedicated physical channel (DPCH) scheduling method, the method comprising:

According to the attributes of the HSPA carrier and the number of uplink and downlink users, it is judged whether the TS0 of the HSPA carrier needs to add a DPCH;

When a DPCH needs to be added, configure the DPCH according to the code channel power of the TS0.

Wherein, the method for judging whether the TS0 of the HSPA carrier needs to add a DPCH according to the attributes of the HSPA carrier and the number of uplink and downlink users is specifically:

When the HSPA carrier is the main carrier and the numbers of uplink and downlink access users are different, a downlink DPCH needs to be configured on the TS0 of the HSPA carrier.

Wherein, the method for judging whether the TS0 of the HSPA carrier needs to add a DPCH according to the attributes of the HSPA carrier and the number of uplink and downlink users is specifically:

When the HSPA carrier is a secondary carrier, judging whether the HSPA carrier has the same frequency as the main carrier of the neighboring cell, and when the frequency is different, judging whether the number of uplink and downlink access users is the same;

When the numbers of uplink and downlink access users are different, a downlink DPCH needs to be configured on the TS0 of the HSPA carrier.

Wherein, the configuration of the DPCH according to the code channel power of the TS0 is:

Determine the number of configurable code channels according to the current power headroom of the TS0, and add a DPCH to the TS0 according to the number of configurable code channels.

Further, the method also includes:

When the code channel power of TS0 exceeds the maximum code channel power after adding the DPCH, stop adding the DPCH, and start the frame division multiplexing function of the added DPCH.

A HSPA carrier DPCH scheduling device, comprising: a judging module and a configuration module; wherein,

The judging module is used to judge whether the TS0 of the HSPA carrier needs to add a DPCH according to the attributes of the HSPA carrier and the number of uplink and downlink users;

The configuration module is configured to configure the DPCH according to the code channel power of the TS0 when the DPCH needs to be added.

Wherein, the judging module is specifically configured to judge that a downlink DPCH needs to be configured on the TS0 of the HSPA carrier when the HSPA carrier is the main carrier and the number of uplink and downlink access users are different.

Wherein, the judging module is specifically used for judging whether the HSPA carrier has the same frequency as the main carrier of the adjacent cell when the HSPA carrier is a secondary carrier, and judging whether the number of uplink and downlink access users is the same when the frequency is different ; When the numbers of uplink and downlink access users are different, it is determined that a downlink DPCH needs to be configured on the TS0 of the HSPA carrier.

Wherein, the configuration module is specifically configured to determine the number of configurable code channels according to the current power headroom of the TS0, and add a DPCH to the TS0 according to the number of configurable code channels.

Further, the configuration module is further configured to stop adding DPCH and enable the frame division multiplexing function of the added DPCH when the code channel power of TS0 exceeds the maximum code channel power after the DPCH is added.

According to the attributes of the HSPA carrier of TD-SCDMA, the present invention dynamically configures the DPCH on the TS0 of the HSPA carrier, expands the DPCH channel resource of the HSPA carrier frequency downlink, improves the capacity of the HSPA carrier, and can realize the uplink and downlink code of the HSPA carrier frequency Channel balance, improve the overall access user capacity of HSPA carriers, and maximize the utilization of spectrum resources.

Description of drawings

Fig. 1 is the realization flowchart of HSPA carrier DPCH scheduling method of the present invention;

Fig. 2 is the realization flow diagram of the embodiment of HSPA carrier DPCH scheduling method of the present invention;

FIG. 3 is a schematic structural diagram of a DPCH scheduling device for an HSPA carrier according to the present invention.

detailed description

With the development of TD-SCDMA technology, TD-SCDMA system has appeared multi-frequency point technology, that is: multiple carriers are combined together to share the same group of common channel resources to form a multi-carrier cell; here, a cell can occupy multiple carrier resources, including a primary carrier and at least one secondary carrier, where the TS0 of the primary carrier is still used as a downlink broadcast time slot, and the TS0 of the secondary carrier is not used, resulting in waste of spectrum resources.

The basic idea of the present invention is: according to the attributes of the HSPA carrier and the number of uplink and downlink users, judge whether the TS0 of the HSPA carrier needs to add a DPCH; when the DPCH needs to be added, configure the DPCH according to the code channel power of the TS0.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

Fig. 1 has shown the realization process of HSPA carrier DPCH scheduling method of the present invention, as shown in Fig. 1, described method comprises the following steps:

Step 101, according to the attributes of the HSPA carrier and the number of uplink and downlink users, determine whether the TS0 of the HSPA carrier needs to add a DPCH;

Specifically, in this step, first judge the attribute of the HSPA carrier, when the HSPA carrier is the main carrier, further judge whether the number of HSPA uplink and downlink access users of the HSPA carrier is the same, if not, then determine whether the HSPA carrier needs to Configure a downlink DPCH on the TS0 of the HSPA carrier, otherwise, there is no need to configure a downlink DPCH on the TS0 of the HSPA carrier; wherein, the uplink and downlink access users can enable the uplink and downlink of the frame division multiplexing function for the carrier Downlink access users.

When the HSPA carrier is a secondary carrier, determine whether the HSPA carrier has the same frequency as the main carrier frequency of the surrounding neighboring cells. When the frequency is the same, because the scrambling code in TD-SCDMA is short, the same-frequency interference of TS0 has a greater impact , will often affect terminal measurement and produce no handover. Therefore, at this time, do not configure DPCH on TS0 of the HSPA carrier; Then it is determined that a downlink DPCH needs to be configured on the TS0 of the HSPA carrier, otherwise, no downlink DPCH needs to be configured on the TS0 of the HSPA carrier; wherein, the uplink and downlink access users can enable the frame division multiplexing function for the carrier uplink and downlink access users.

Step 102, when a DPCH needs to be added, configure the DPCH according to the code channel power of the TS0.

In this step, the maximum number of configurable code channels is determined according to the maximum code channel power of the TS0, and a DPCH is added on the TS0 according to the maximum number of configurable code channels; here, the maximum code channel power can be passed as follows Formula to calculate:

P=10log(N*PCCPCH POWER);

Wherein, the P is the maximum code channel power, N is the maximum number of configurable code channels, and PCCPCH POWER is the power of the primary common control physical channel (Primary Common Control Physical Channel, PCCPCH); for example: if the HPSA carrier described in the existing network The maximum code channel power of TS0 is 45dBm, calculated according to PCCPCH POWER 33dBm, when N=13, P=44.14, which does not exceed the total power, so, 13 is the maximum number of configurable code channels. When 9 DPCHs have been configured in TS0, only 4 DPCHs can be added dynamically at most.

Preferably, the method may further include: when the code channel power of TS0 exceeds the maximum code channel power after adding the DPCH, stop adding the DPCH, and enable the frame division multiplexing function of the added DPCH; here, the mobile communication system The terminal is required to maintain service continuity when moving, and the terminal needs to continuously measure the PCCPCH power of surrounding cells when performing data services.

In the present invention, since the TS0 of the HSUPA carrier is configured with DPCH, it has an impact on the measurement of the surrounding cells by the terminal. Therefore, by enabling the frame division multiplexing function on the DPCH, the user has free time to measure the surrounding cells in the repetition period of the DPCH. Ensure business continuity when the terminal moves; for example, when only one user is connected in the state of double frame division, the remaining 1/2 time can be used to measure the information of neighboring cells and perform handover actions.

Fig. 2 has shown the implementation flow of HSPA carrier DPCH scheduling method embodiment of the present invention, as shown in Fig. 2, described embodiment comprises the following steps:

Step 201, judge the attribute of the HSPA carrier carrying HSUPA; when the HSPA carrier is a secondary carrier, perform step 202, and when the HSPA carrier is a primary carrier, perform step 203;

Step 202, when the HSPA carrier is a secondary carrier, judge whether the HSPA carrier has the same frequency as the main carrier of the surrounding neighboring cells, if not, execute step 203, and if the frequency is the same, execute step 204;

Specifically, when the HSPA carrier is a secondary carrier, the frequency points of the main carrier in the surrounding macro-neighboring cells can be collected, and if the same frequency as the own carrier is not found, then step 203 is performed; otherwise, step 204 is performed.

Among them, since the A frequency band (2010-2025 MHz) is generally used as the main carrier frequency in the current TD-SCDMA, and the F-band (1880-1920 MHz) frequency is used for capacity expansion, so the HSPA carrier frequency can usually be configured preferentially On the non-main carrier frequency networking frequency point: F-band frequency point.

Step 203, judging whether the number of uplink and downlink access users of the frame division multiplexing of the HSPA carrier is consistent, if consistent, then perform step 204, otherwise perform step 205;

Step 204, do not configure DPCH in TS0 of the HSPA carrier, and the current processing flow ends;

Step 205, it is necessary to configure a downlink DPCH on the TS0 of the HSPA carrier, and then perform step 206;

Step 206, measuring and calculating the power headroom of the current TS0 of the HSPA;

Specifically, the maximum number of configurable code channels is determined according to the known maximum code channel power of the TS0 of the HSPA, and the power of the current TS0 of the HSPA is determined according to the maximum number of configurable code channels combined with the number of configured code channels margin.

Step 207, add DPCH on TS0 according to the power headroom;

Specifically, the DPCH code channel resource with a downlink spreading factor of 16 can be increased.

Step 208, judging whether the code channel power of TS0 after adding DPCH exceeds the maximum total code channel power, if not, return to step 207, otherwise, execute step 209;

Step 209, stop adding DPCH, and start the frame division multiplexing function of the added DPCH;

Specifically, in order to meet the switching requirements of mobile terminals, the frame division multiplexing function of the HSPA carrier frequency can be enabled to allow users to have time to perform measurements during service intervals and ensure normal service switching.

Here, on the basis of double uplink frame division and downlink quadruple frame division, the number of uplink and downlink DPCHs is calculated to ensure that the number of uplink and downlink access users is the same, to realize the balance of uplink and downlink code resources, and in the original HSPA On the basis of access users, 2×N users are added, where N is the frame division multiple; when HSPA user services are accessed, the system schedules 2×N users to TS0 carrying the secondary carrier frequency of HSPA.

Usually, the uplink and downlink code resources can be balanced by adding four downlink SF16 code resources as DPCH in TS0.

Fig. 3 shows the structure of the HSPA carrier DPCH scheduling device of the present invention, as shown in Fig. 3, the device includes: a judging module and a configuration module; wherein,

The judging module is used to judge whether the time slot 0 TS0 of the HSPA carrier needs to add a DPCH according to the attributes of the HSPA carrier and the number of uplink and downlink users;

The configuration module is configured to configure the DPCH according to the code channel power of the TS0 when the DPCH needs to be added.

Wherein, the judging module is specifically configured to configure a downlink DPCH on TS0 of the HSPA carrier when the HSPA carrier is the main carrier and the number of uplink and downlink access users is different; wherein, the uplink and downlink The access user can enable the uplink and downlink access users with the frame division multiplexing function for the carrier.

Wherein, the judging module is specifically used for judging whether the HSPA carrier has the same frequency as the main carrier of the adjacent cell when the HSPA carrier is a secondary carrier, and judging whether the number of uplink and downlink access users is the same when the frequency is different ; When the number of uplink and downlink access users is different, it is determined that a downlink DPCH needs to be configured on TS0 of the HSPA carrier; when the frequency is the same, because the scrambling code in TD-SCDMA is shorter, the impact of the same frequency interference of TS0 Larger, it will often affect the terminal measurement and produce no handover. Therefore, at this time, DPCH is not configured on TS0 of the HSPA carrier; wherein, the uplink and downlink access users can enable the uplink and downlink of the frame division multiplexing function for the carrier. Access users.

Wherein, the configuration module is specifically configured to determine the maximum number of configurable code channels according to the maximum code channel power of the TS0, and add a DPCH to the TS0 according to the maximum number of configurable code channels; here, the maximum code channel The power can be calculated by the following formula:

P=10log(N*PCCPCH POWER);

Wherein, the P is the maximum code channel power, N is the maximum configurable code channel number, and PCCPCH POWER is the power of the PCCPCH; for example, if the maximum code channel power of the TS0 of the HPSA carrier described in the existing network is 45dBm, the PCCPCH POWER is Calculated at 33dBm, when N=13, P=44.14, which does not exceed the total power, so 13 is the maximum number of configurable code channels. When TS0 has been configured with nine DPCHs, only four more DPCHs can be added dynamically at most.

Further, the configuration module is also used to stop adding DPCH and enable the frame division multiplexing function of the added DPCH when the code channel power of TS0 exceeds the maximum code channel power after adding DPCH; here, mobile communication The system requires the terminal to maintain service continuity when moving, and the terminal needs to continuously measure the PCCPCH power of surrounding cells when performing data services.

In the present invention, since the TS0 of the HSUPA carrier is configured with DPCH, it has an impact on the measurement of surrounding cells by the terminal. Therefore, by enabling the frame division multiplexing function on the DPCH, the user has free time to measure the surrounding cells in the repetition period of the DPCH, and realizes Business continuity is guaranteed when the terminal is moving; if only one user is connected in the state of double frame division, the remaining 1/2 time can be used to measure the information of neighboring cells and perform handover actions.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (6)

1. A method for scheduling a high speed packet access HSPA carrier dedicated physical channel DPCH, the method comprising:

judging whether the time slot 0TS0 of the HSPA carrier needs to increase the DPCH or not according to the attribute of the HSPA carrier and the number of uplink and downlink users;

when the DPCH needs to be added, the DPCH is configured according to the code channel power of the TS 0;

wherein, the uplink and downlink users are uplink and downlink access users with the HSPA carrier starting frame division multiplexing function;

the method for judging whether the TS0 of the HSPA carrier needs to increase the DPCH according to the attribute of the HSPA carrier and the number of uplink and downlink users specifically includes:

when the HSPA carrier is a main carrier and the number of uplink and downlink access users is different, a downlink DPCH needs to be configured on the TS0 of the HSPA carrier;

when the HSPA carrier wave is an auxiliary carrier wave, judging whether the HSPA carrier wave has the same frequency with a main carrier wave of a neighboring cell, and when the HSPA carrier wave has different frequencies, judging whether the number of uplink and downlink access users is the same; when the number of the uplink access users is different from the number of the downlink access users, a downlink DPCH needs to be configured on the TS0 of the HSPA carrier.

2. The method of claim 1, wherein the DPCH according to the code power configuration of the TS0 is:

and determining the number of configurable code channels according to the current power headroom of the TS0, and increasing the DPCH on the TS0 according to the number of the configurable code channels.

3. The method of claim 2, further comprising:

and when the code channel power of the TS0 exceeds the maximum code channel power after the DPCH is added, stopping adding the DPCH and starting the frame division multiplexing function of the added DPCH.

4. An apparatus for scheduling a HSPA carrier DPCH, the apparatus comprising: a judging module and a configuration module; wherein,

the judging module is used for judging whether the TS0 of the HSPA carrier needs to increase the DPCH according to the attribute of the HSPA carrier and the number of uplink and downlink users;

the configuration module is configured to configure the DPCH according to the code channel power of the TS0 when the DPCH needs to be increased;

wherein, the uplink and downlink users are uplink and downlink access users with the HSPA carrier starting frame division multiplexing function;

the determining module is specifically configured to determine that a downlink DPCH needs to be configured on the TS0 of the HSPA carrier when the HSPA carrier is a main carrier and the number of uplink and downlink access users is different;

the system is also used for judging whether the HSPA carrier wave has the same frequency with a main carrier wave of a neighboring cell when the HSPA carrier wave is an auxiliary carrier wave, and judging whether the number of uplink and downlink access users is the same when the HSPA carrier wave has different frequencies; and when the number of the uplink access users is different from that of the downlink access users, determining that the downlink DPCH needs to be configured on the TS0 of the HSPA carrier.

5. The apparatus of claim 4, wherein the configuration module is specifically configured to determine a configurable number of code channels according to the current power headroom of the TS0, and increase the DPCH on the TS0 according to the configurable number of code channels.

6. The apparatus of claim 5, wherein the configuring module is further configured to stop increasing the DPCH and start a frame division multiplexing function of the increased DPCH when a code power of the TS0 exceeds a maximum code power after the DPCH is increased.