WO2008019549A1

WO2008019549A1 - A method and system for implementing e-dch switching

Info

Publication number: WO2008019549A1
Application number: PCT/CN2007/000858
Authority: WO
Inventors: Yanchun Xie; Kaitao Huang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-08-10
Filing date: 2007-03-16
Publication date: 2008-02-21
Also published as: CN101123796A; CN101123796B

Abstract

A method for implementing E-DCH switching,the method comprises;sets E-DCH service amount measured information (100),network side depends on the E-DCH service amount measured report, and when meeting a presetted switching condition, carries out the switching from E-DCH to low speed channel (101).A system for implementing E-DCH switching, network side depends on the measuring of E-DCH service amount,implements the channel switching from E-DCH to low speed channel,reduces the consume of radio power and code resource by using the E-DCH,enhances the flexibility of channel switching. Meanwhile,the invention further solves the problem of ping-pong switching,finely,improves the success rate of channel switching,thereby further enhances the stability of channel switching.

Description

Method and system for implementing enhanced uplink dedicated channel switching

Technical field

The present invention relates to a High Speed Uplink Packet Access (HSUPA) technology, and more particularly to a method and system for implementing Enhanced Uplink Dedicated Channel (E-DCH) handover. Background of the invention

For the Wideband Code Division Multiple Access (WCDMA) system of Release 99 (Release 99) or Release 4, the uplink and downlink capacity of the bearer service is limited, theoretically not exceeding 2 Mbps, the actual throughput rate of a single user. The lower the maximum allowed transfer rate is 384Kbps. The actual transmission rate often does not reach such a high rate, 'this is a significant deficiency for services that provide high-speed data services.

The main purpose of the third generation mobile communication technology is to provide a relatively large transmission bandwidth and ensure that users transmit high-speed multimedia services. In order to further improve spectrum utilization and better carry out multimedia communication and packet data transmission, following the introduction of the High Speed Downlink Packet Access (HSDPA) technology to improve downlink capacity and transmission rate in the Release 5 standard, the third generation partner program ( The 3GPP) organization introduced the HSUPA technology in the Release 6 standard. HSUPA adopts the uplink fast scheduling, hybrid automatic request retransmission (HARQ), and 2ms short frame of the base station NodeB, and also adds an uplink dedicated channel, E-DCH, to support HSUPA transmission. Using E-DCH to transmit data, the user's uplink throughput rate has been greatly improved. Theoretically, the maximum peak rate is 5.76 Mbps, and the system uplink capacity has also been greatly improved.

Generally, when the traffic is large, in order to increase the uplink transmission rate, E-DCH transmission is adopted. Data, and when traffic is reduced, in order to reduce the consumption of wireless power and code resources, data transmitted by E-DCH should be switched to be transmitted by a low-speed channel such as DCH7FACH/PCH, that is, channel switching. The DCH is a dedicated channel, the FACH is a forward access channel, and the PCH is a paging channel. The low-speed channel mentioned herein is a channel relative to the E-DCH. In order to ensure the success rate of channel switching, before the channel switching, the channels before and after the handover should be measured separately, and the actual traffic volume currently carried on each channel is learned, and whether to switch is determined according to the actual traffic volume, only when The channel meets the 4B event standard, that is, when the traffic carried on the channel is lower than a certain absolute threshold, the channel switching is performed.

According to the current protocol, for the uplink channel, the user terminal (UE) can only measure the uplink shared channel (USCH) in the random access channel (RACH), DCH or time division default (TDD) mode, that is, When the UE uses the E-DCH, the E-DCH is not specified in the protocol. Therefore, the UE cannot report the actual traffic carried on the E-DCH. Thus, the current uplink uses the E-DCH, and when the uplink service is used. When the amount is reduced:

(1) If the radio network controller (RNC) wants to implement channel switching according to the traffic 4B events of all uplink transmission channels and downlink transmission channels of the UE, but the E-DCH has no traffic report, the E-DCH handover cannot be satisfied. Condition, and the E-DCH cannot be switched to the low-speed channel according to the traffic measurement.

(2) If the RNC only implements channel switching according to the traffic uplink 4B event of the UE uplink DCH channel and the downlink channel, then, when the data is switched from the E-DCH to the DCH/FACH/PCH, it is likely to be due to the original E. The actual traffic carried on the -DCH is still relatively large. In order to guarantee the quality of service (QoS), the RNC needs to re-migrate the data switched to the DCH/FACH/PCH back to the E-DCH again, thus causing the problem of continuous ping-pong switching. The success rate of channel switching is greatly reduced.

According to the current protocol, since the E-DCH is not measured, it causes the channel switching of the E-DCH to the low-speed channel, or it cannot be realized at all, and the wireless power is wasted. And code resources, affecting the flexibility of channel switching; or even if implemented, it will be greatly reduced

The success rate of E-DCH switching to a low-speed channel, which seriously affects the stability of channel switching. Summary of the invention

In view of this, the main object of the present invention is to provide a method for implementing enhanced uplink dedicated channel switching, which can successfully implement E-DCH switching.

Another object of the present invention is to provide a system for implementing enhanced uplink dedicated channel switching, which can successfully implement E-DCH switching.

In order to achieve the above object, the technical solution of the present invention is specifically implemented as follows:

A method for enhancing an E-DCH handover of an uplink dedicated channel, the method comprising the steps of:

A. Set E-DCH traffic measurement information;

B. The network side performs the E-DCH traffic measurement report reported by the user terminal, and performs E-DCH to low-speed channel switching when the preset switching condition is met.

A system for implementing enhanced E-DCH handover of an uplink dedicated channel, the system comprising a user terminal UE and a radio network controller RNC, wherein

A measurement module and a reporting module are disposed in the UE, the measurement module is configured to measure the E-DCH traffic, and the E-DCH traffic measurement report is sent to the reporting module; the reporting module is configured to receive the received E-DCH traffic. The measurement report is reported to the RNC;

The first decision module is disposed in the NC, and receives an E-DCH traffic measurement report from the UE, and performs E-DCH to low-speed channel switching when the preset handover condition is met.

It can be seen from one of the above technical solutions that the E-DCH traffic measurement information, that is, the uplink transport channel in the existing traffic measurement object information, the traffic measurement event result, and the traffic measurement report standard configuration, respectively. New E-DCH in type cell Channel type, and corresponding E-DCH MAC-d flow identity (E-DCH MAC-d flow identity) cells for distinguishing PS services carried on the E-DCH, so that the UE can measure E- The amount of traffic on the logical channel corresponding to the DCH. The network side realizes the channel switching from the E-DCH to the low-speed channel by measuring the traffic on the E-DCH, and the P-segment reduces the consumption of the wireless power and the code resource by using the E-DCH, and enhances the channel switching. flexibility.

Further, a technical solution in the foregoing technical solution sets a period of time, and counts the number of times of the E-DCH or E-DCH and the 4B event measurement report reported by the channel related to the channel switching in the time period, and collects statistics on each channel. When the number of times reaches the preset channel switching threshold, the E-DCH to low-speed channel switching is performed. This processing solves the problem of ping-pong switching well and improves the success rate of channel switching, thereby further strengthening. Channel switching stability. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a flow chart of the method of the present invention;

2 is a flow chart of an embodiment of the E-DCH handover to FACH of the present invention;

3 is a flow chart of an embodiment of the E-DCH switching to DCH of the present invention;

Figure 4 is a schematic view showing the structure of the system of the present invention. Mode for carrying out the invention

The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

Figure 1 is a flow chart of the method of the present invention, comprising the following steps:

Step 100: Set E-DCH traffic measurement information.

In order to support the UE's traffic measurement on the E-DCH channel, the uplink traffic in the existing traffic measurement object information, the traffic measurement event result, and the traffic volume measurement standard configuration respectively In the transport channel type cell, an E-DCH channel type is added; and an E-DCH MAC-d flow identity cell for distinguishing each PS service carried on the E-DCH is added. In this way, the UE can measure the traffic on the logical channel corresponding to the E-DCH, that is, when the traffic carried on the E-DCH channel is lower than a certain preset absolute threshold, the 4B measurement report is reported.

It should be noted that the method for measuring the traffic on the logical channel corresponding to the E-DCH is the same as the measurement method for the RACH, the DCH, or the USCH, but only for different channels, and belongs to the prior art. Said.

Step 101: The network side performs an E-DCH traffic measurement report reported by the user terminal, and performs E-DCH to low-speed channel switching when the preset switching condition is met.

When the service is carried on the E-DCH, the method of the present invention is based on the measurement of the E-DCH, when the traffic measurement report of the E-DCH satisfies the preset switching condition, that is, when the traffic measurement report is a 4B event measurement report, Switching from E-DCH to low speed channels such as DCH.

It should be noted that if the method is to switch from the E-DCH to the low-speed channel such as the FACH/PCH, the method further includes: determining, by the network side, the channel traffic measurement report related to the handover reported by the user terminal, whether the pre-satisfaction is satisfied at the same time. The switching element is set, and if it is satisfied, the switching of the E-DCH to the low speed channel is performed; otherwise, the flow of the present invention is ended. The relevant channel refers to all other channels currently used by the UE.

It can be seen from the flow shown in FIG. 1 that the method of the present invention implements channel switching from E-DCH to low-speed channel by measuring traffic on the E-DCH, and reduces the use of E-DCH for wireless power and code resources. The consumption increases the flexibility of channel switching.

Further, a time period is set in advance, and it is counted whether the number of times of the 4B event measurement report reported by the E-DCH or the E-DCH and the related channel in the time period reaches a preset channel switching threshold. -DCH to low speed channel switching; otherwise, channel switching is not performed. It can be easily seen that the processing of the present invention solves the problem of ping-pong switching well, improves the success rate of channel switching, and further enhances the stability of channel switching. The implementation of the method of the present invention is described in detail below in connection with two embodiments.

2 is a flowchart of an embodiment of the E-DCH handover to the FACH according to the present invention. It is assumed that the E-DCH traffic measurement information has been set, that is, the UE supports the measurement of the E-DCH traffic, as shown in FIG. 2, E- The DCH handover to the PACH includes the following steps:

Step 200: The user terminal reports the 4B event measurement report of the E-DCH to the network side. Step 201: The network side determines whether to allow switching from the E-DCH to the FACH according to the preset switching information. If yes, the process proceeds to step 202. Otherwise, the process ends.

In this embodiment, it is assumed that the network side is provided with switching information indicating whether to allow the E-DCH to switch to the low-speed channel, and the switching information is displayed as allowing switching from the E-DCH to the FACH, and the process proceeds to step 202.

Step 202: Determine whether the other channels currently used by the user terminal report the 4B event measurement report, and if yes, go to step 203; otherwise, end the process.

In this embodiment, it is assumed that the other channel currently used by the user terminal has reported the 4B event measurement report, and the process proceeds to step 203.

Step 203: Start the 4B event measurement report statistics timer, and count the number of times of the 4B event measurement report on each channel until the timer expires. ·

In this embodiment, the 4B event measurement report statistic timer is used to set a period of time, and the timing duration of the timer may be determined according to service related information, such as the type of service, etc. Generally, for real-time services, the timer may be set. The timing of the timer is shorter, and for non-real-time services, the timer can be set to have a longer timing. The timing duration depends on the simulation results of the actual situation. The timing of the 4B event measurement report statistics timer is not limited here.

In addition, different 4B event measurement report statistics timers are set for the switching of E-DCH to different low-speed channels.

Step 204: Determine whether the number of times of the 4B event measurement report reported by each channel exceeds a preset channel switching threshold. If yes, proceed to step 205; otherwise, end the process. The value of the preset channel switching threshold is related to the timing of the 415 event measurement report statistics timer. The specific value depends on the simulation result of the actual situation. The value of the channel switching threshold is not limited here.

In this embodiment, it is assumed that the number of times of the event measurement report reported by each channel exceeds the preset channel switching threshold, and the process proceeds to step 205.

Step 205: Perform E-DCH to: FACH switching.

This step is implemented through the existing radio bearer (RB) reconfiguration process. For details, refer to related protocols, and details are not mentioned here.

3 is a flowchart of an embodiment of the E-DCH handover to the DCH according to the present invention. It is assumed that E-DCH traffic measurement information has been set, that is, the UE supports measurement of the Ε-DCH traffic, as shown in FIG. 3, E- The DCH switching to the DCH includes the following steps:

Step 300: The user terminal reports the event measurement report of the E-DCH to the network side. Step 301: The network side determines whether to allow switching from the E-DCH to the DCH according to the preset switching information. If yes, the process proceeds to step 302. Otherwise, the process ends.

In this embodiment, it is assumed that the handover information indicating whether to allow the E-DCH to switch to the low-speed channel is set on the network side, and the handover information is displayed as permitting the handover from the E-DCH to the DCH, and the process proceeds to step 302. ·

Step 302: Start the 4 event measurement ^ ^: report the statistics timer, and count the number of 4 event measurement reports reported by the E-DCH until the timer expires.

In this embodiment, for the switching of the E-DCH to the DCH, the DCH event detection report statistics timer is set.

Step 303: Determine whether the number of times of the event measurement report reported by the E-DCH exceeds a preset channel switching threshold. If yes, proceed to step 305; otherwise, end the process.

In this embodiment, it is assumed that the number of times of the event measurement report reported by the E-DCH channel exceeds the preset channel switching threshold, and the process proceeds to step 305. Step 305: Perform handover of the E-DCH to the DCH.

This step is completed through the existing RB reconfiguration process. For details, refer to related protocols, and details are not mentioned here.

In conjunction with the foregoing method of the present invention, a system for implementing E-DCH switching is also provided. FIG. 4 is a schematic structural diagram of the system of the present invention. As shown in FIG. 4, the system includes: a user terminal UE and a radio network controller RC, where

A measurement module and a reporting module are disposed in the UE, the measurement module is configured to measure the E-DCH traffic, and the E-DCH traffic measurement report is sent to the reporting module; the reporting module is configured to receive the received E-DCH traffic. The measurement report is reported to the RC;

A first decision module is configured in the RNC, configured to receive the reported E-DCH traffic measurement report from the UE, and perform E-DCH to low-speed channel switching when the preset handover condition is met.

Further configured in the R C is a second decision module;

When the low-speed channel is a dedicated channel DCH, and the E-DCH traffic measurement report is a 4B event measurement report,

The second decision module is configured to receive the switching information from the E-DCH to the DCH, and the second determining module is configured to receive the reported 4B event measurement report from the UE, where the time period is set in advance. And the number of times the 4B event measurement report reported by the E-DCH reaches a preset channel switching threshold, and the first decision module is notified to perform switching of the E-DCH to the low-speed channel.

When the low-speed channel is a forward access channel FACH or a paging channel PCH, and the E-DCH traffic measurement report and the channel traffic measurement report related to the handover are both 4B event measurement reports, the second decision The module is configured to receive a reported 4B event measurement report from the UE.

The second decision module is pre-configured to allow switching from E-DCH to FACH/PCH handover The information, when the number of times of the 4B event measurement reported by the UE reaches the preset channel switching threshold, is notified to the first decision module to perform the E-DCH to low-speed channel switching. .

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included. It is within the scope of the invention.

Claims

Claim

A method for implementing enhanced uplink dedicated channel E-DCH handover, characterized in that the method comprises the following steps:

A. Set E-DCH traffic measurement information;

2. The method according to claim 1, wherein the step A specifically comprises:

In the uplink traffic channel type cells in the existing traffic measurement object information, the traffic measurement event result, and the traffic measurement report standard configuration, the E-DCH channel class type is added, and the difference is used to differentiate the bearer in the E. - E-DCH MAC-d flow identification cells for each service on the DCH.

3. The method according to claim 1, wherein the low speed channel is a dedicated channel DCH. .

4. The method according to claim 3, wherein the satisfying the switching condition is: the E-DCH traffic measurement report is a 4B event measurement report.

The method according to claim 4, wherein before the step B, the method further comprises: pre-configuring, in the network side, handover information that allows switching from E-DCH to DCH;

Before the switching of the E-DCH to the low-speed channel is performed in the step B, the method further includes: setting a time period in advance, and counting whether the number of times of the 4B event measurement report reported by the E-DCH in the time period reaches a preset. The channel switching threshold, if yes, continues to perform the E-DCH to low-speed channel switching in step B; otherwise, the process of the present invention ends.

6. The method according to claim 1, wherein the low speed channel is before To the access channel FACH or paging channel PCH;

Before performing the switching of the E-DCH to the low-speed channel in the step B, the method further includes: determining, by the network side, the channel traffic measurement report related to the handover reported by the user terminal, whether the preset handover condition is met at the same time, if the Then, the switching of the E-DCH to the low speed channel is performed; otherwise, the flow of the present invention is ended.

The method according to claim 6, wherein the satisfying handover condition is: the E-DCH traffic measurement report and the channel traffic measurement report related to the handover are all 4B event measurement reports.

The method according to claim 7, wherein, before the step B, the method further comprises: pre-configuring, in the network side, handover information that allows switching from E-DCH to FACH/PCH;

Before the switching of the E-DCH to the low-speed channel is performed in the step B, the method further includes: setting a time period in advance, and counting the number of times of the 4B event measurement report reported by the E-DCH in the time period and related to the handover If the channel traffic measurement report reaches the preset channel switching threshold, if yes, continue to perform the E-DCH to low-speed channel switching in step B; otherwise, the process of the present invention ends.

The method according to any one of claims 6 to 8, wherein the switching related channel is: all channels except the E-DCH currently used by the user terminal.

The method according to claim 5 or 8, wherein the setting of a time period is: setting and starting a timer.

The method according to claim 1, 5 or 8, wherein the method for performing the handover of the E-DCH to the low-speed channel in the step B is performed by the existing radio bearer RB reconfiguration process.

12. A system for implementing enhanced uplink dedicated channel E-DCH handover, characterized in that the system comprises a user terminal UE and a radio network controller RC, wherein A measurement module and a reporting module are disposed in the UE, the measurement module is configured to measure the E-DCH traffic, and the E-DCH traffic measurement report is sent to the reporting module; the reporting module is configured to receive the received E-DCH traffic. The measurement report is reported to the RNC;

A first decision module is configured in the R C for receiving the E-DCH traffic measurement report reported from the UI, and switching the E-DCH to the low-speed channel when the preset handover condition is met.

The system according to claim 12, wherein the RNC is further provided with a second decision module;

When the low-speed channel is a dedicated channel DCH, and the E-DCH traffic measurement ^ ^: is a 4B event measurement report,

The second decision module is configured to receive the switching information from the E-DCH to the DCH, and the second determining module is configured to receive the reported 4B event measurement report from the UE, where the time period is set in advance. And the number of times the 4B event measurement report reported by the E-DCH reaches a preset channel switching threshold, and the first decision module is notified to perform switching of the E-DCH to the low-speed channel. '

The system according to claim 12, wherein the R C is further provided with a second decision module;

When the low-speed channel is a forward access channel FACH or a paging channel PCH, and the E-DCH traffic measurement report and the channel traffic measurement report related to the handover are both 4B event measurement reports, the second decision The module is configured to receive a 4B event measurement report reported from the UE.

The second decision module pre-configures the switching information that is allowed to be switched from the E-DCH to the FACH/PCH, and the number of times of the 4B event measurement report reported by the UE reaches the preset channel switching threshold in a preset period of time. And the first decision module is notified to perform the switching of the E-DCH to the fast channel.