Networking PolicyOverviewWith the rapid development of the HSPA+, it is an inevitable trend to introduce the HSPA+ to commercial networks. The MIMO requires the STTD to set to ON. Therefore, the performance of certain HSDPA terminals of R5 and R6 deteriorates due to the rollback of the receiver type. Generally, it is recommended that a MIMO cell shares carriers with an R99 cell instead of an HSDPA cell. The network policies of the 64QAM are the same as those of the HSDPA. A 64QAM-enabled cell can share the second carrier with an HSDPA-enabled cell. The networkings of the 64QAM and MIMO are configured separately. Considering actual operation scenarios and industry policies, the prerequisite to introduce the HSPA+ is that the existing HSDPA or R99 services are not affected. That is, compared with the HSDPA and HSPA+ services, the R99 service 1. The R99, HSDPA, and HSPA+ services can share power resources dynamically. However, the R99 service is always preferred. 2. The R99, HSDPA, and HSPA+ services can share code resources dynamically. However, the R99 service is always preferred. 3. The R99, HSDPA, and HSPA+ services fully share transmission resources. However, the R99 service is always preferred. To guarantee the smooth operation of the HSPA+ service, Configure a GBR for the HSPA+ service to ensure the minimum power, code, and transmission resources obtained by the service. For the HSPA+-enabled dual-carrier service, the research focuses on how to allocate code, power, and transmission resources to the HSPA+ and R99 service to achieve the maximum resource usage in addition to the original features of the R99 service.

HSPA+ 64QAM Dual-Carrier Service Allocation PolicyHSPA+ 64QAM Networking Mode IThe first carrier supports the R99 and HSPA services (including the HSDPA service and HSPA+64QAM service) and implements continuous coverage. The second carrier supports the HSDPA service and HSPA+ 64QAM service. The following figure shows the networking.

F2 R99+H

R99+H 1

R99+H 1 R99+H

R99+H 2 R99+H R99+H

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Hot Spot

Figure Error! Bookmark not defined. Dual-carrier networking I The networking advantage is that either the networking policy or the configuration is simple, and the uniform management is implemented in the network. One clear disadvantage is that the HSPA fails to achieve load balancing. The R99 service can preempt either code or power resources of the HSDPA service. Therefore, it is difficult to guarantee smooth operation of the HSDPA and HSPA+ 64QAM services and trigger the load balancing between the two carriers. In addition, the load balancing of the HSPA service brings fluctuations and the ping-pong effect.

HSPA+ 64QAM Networking Mode IIThe first TRX implements continuous coverage and the second TRX covers hot spot areas. Both the two TRXs support the R99 and HSPA+ 64 QAM.

F2 R99+HS DPA

R99+H 1 1 R99

R99+H

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Figure Error! Bookmark not defined. Dual-carrier networking II

Networking mode II greatly differs from networking mode I in camping policies, mobility management, and load control. The advantage of networking mode II is to guarantee smooth operation of the R99 and HSPA+ 64QAM services and ensure load balancing of the HSDPA service. The disadvantage is that the networking is complex and involves multiple policies and configurations.

Comparison of Two HSPA+ 64QAM Networking ModesTable 6 shows advantages and disadvantages of the two networking modes. Table Error! Bookmark not defined. Comparison of two networking modes Scenario Name Advantage 1. The two carriers implement continuous coverage of the HSPA service. 2. Both R99 and HSPA users can make calls in this cell, and the access delay is low. 3. R99 users implement load sharing in hot spot areas. Therefore, cells served by the two carriers achieve load balancing. 4. HSPA users implement load balancing through random camping policies. 1. The R99 service is covered continuously by a single TRX. Users can obtain good experience. 2. HSPA-enabled UEs initiate PS calls in the cell covered by frequency 2. Experience of HSPA users is greatly improved because there are fewer R99 users in the cell. Disadvantage

Dual carrier scenario I: Both two carriers provide continuous coverage of the HSPA service.

1. The network is expensive to construct. 2. HSPA users do not achieve load balancing. 3. HSPA resources are configured preferentially for each TRX. Therefore, it is hard to ensure the smooth operation of the HSPA service.

Dual carrier scenario II: HSPA cells are not covered continuously (recommended).

1. If the HSPA-enabled UE enters from the area covered by the single TRX to that covered by double TRXs, the UE is handed over to the intra-frequency R99 cell and cannot be handed over to the inter-frequency HSPA cell. Therefore, the HSPA coverage cannot be implemented. 2. When initiating a call, the HSPAenabled UE is handed over to an interfrequency cell through the DRD. This can affect the access delay of the UE.

To guarantee smooth operation of the HSPA service, commercial networks of Huawei adopt networking mode II. Networking mode I involves simple policies, configuration, and algorithms and is similar to common dual carrier networking.

Introduction to MIMO Networking PolicyIf a MIMO-enabled cell shares one carrier with a common R5 or R6 cell, the type of the HSDPA receiver rolls back and performance of HSDPA UEs deteriorates. Therefore, the MIMO networking must be separate from the HSDPA networking. The general principle is as follows: Maximize the MIMO capacity grain and balance powers of the two transmit channels. Avoid performance loss of R5 HSPA UEs.

There are three MIMO networking modes.

MIMO Networking Mode IThe MIMO technology is deployed on a single frequency, which poses little impact on existing networks. However, another frequency is required. Currently, most networks adopt dual carrier networking, that is, at least operators provide three 3G frequencies.

Figure Error! Bookmark not defined. MIMO networking mode I Advantage The MIMO technology is deployed separately from existing networks. This imposes minimum impacts on existing networks and does not affect the coverage, capacity, or KPIs. Disadvantage The MIMO technology requires to be deployed on an independent frequency and has extra requirements on frequency resources. In the early application period, the penetration ratio of MIMO-enabled UEs is low, and network resource usage is not high.

MIMO Networking Mode IIIf frequency resources are limited, the MIMO deployment can be bound to the R99 service. This avoids performance loss of old R5 HSPA UEs. The networking is as follows:

Figure Error! Bookmark not defined. MIMO networking mode II Advantage Separate MIMO carrier from HSPA carriers. This avoids performance loss of original R5 HSPA UEs in the diversity cell. The MIMO service and R99 service are bound to an identical carrier to reduce the number of required frequencies. During the early period of the MIMO application, high-end users are fewer. Therefore, binding the MIMO and R99 services to an identical carrier improves user experience and increases network resource usage. Disadvantage Binding the MIMO and R99 services to an identical carrier increases the average downlink load of frequency F1 and affects KPIs of the R99 cell because the HSPA service consumes larger downlink power. In this case, you can control uplink load to relieve these impacts.

MIMO Networking Mode IIIIf the operator increases the second TRX to deploy the HSPA+ during the Tx only networking, it is recommended to deploy the MIMO on a single TRX. This imposes little impact on the existing network. The networking is as follows:

Figure Error! Bookmark not defined. MIMO networking mode III Advantage The MIMO technology is deployed separately from existing networks. This imposes minimum impacts on existing networks and does not affect the coverage, capacity, or KPIs. Disadvantage The MIMO technology requires to be deployed on an independent frequency and has extra requirements on frequency resources. In the early period, the penetration ratio of MIMO-enabled UEs is low, and network resource usage is not high. If the HSPA performance loss is acceptable, you can enable the LDR switch to increase resource usage. For the MIMO, networking mode II is recommended, that is, the R99 service shares one carrier with the MIMO service. If the frequency resource usage reaches the maximum value, the impacts on R5 HSDPA UE is minimized.